/* roulang page: index */
:root {
            --primary: #1F6FEB;
            --primary-dark: #1B5FD0;
            --primary-light: #EEF4FF;
            --accent: #D98E04;
            --accent-hover: #C07D03;
            --bg: #F6F8FC;
            --card-bg: #FFFFFF;
            --border: #E6EDF6;
            --text-main: #1A2233;
            --text-secondary: #54647A;
            --text-muted: #7A879B;
            --danger: #D33A3A;
            --radius-card: 16px;
            --radius-img: 12px;
            --radius-btn: 10px;
            --radius-pill: 24px;
            --shadow-card: 0 4px 20px rgba(20, 40, 80, 0.06);
            --shadow-card-hover: 0 8px 28px rgba(20, 40, 80, 0.10);
            --shadow-nav: 0 2px 16px rgba(20, 40, 80, 0.05);
            --transition: 0.2s ease;
            --container: 1200px;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-main);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-img);
        }

        a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
            transition: color var(--transition);
        }

        a:hover {
            color: var(--primary-dark);
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible {
            outline: 3px solid rgba(31, 111, 235, 0.35);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 28px;
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            padding-top: 18px;
            position: relative;
            z-index: 100;
        }

        .nav-panel {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-nav);
            padding: 14px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: nowrap;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .nav-logo-icon {
            width: 42px;
            height: 42px;
            background: var(--primary);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 20px;
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }

        .nav-logo-text {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.2;
            letter-spacing: 0.5px;
        }

        .nav-logo-text span {
            color: var(--primary);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
            flex-shrink: 1;
            min-width: 0;
            padding: 2px 4px;
        }

        .nav-links::-webkit-scrollbar {
            display: none;
        }

        .nav-link-card {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 14px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 10px;
            font-size: 0.86rem;
            font-weight: 500;
            color: var(--text-secondary);
            text-decoration: none;
            white-space: nowrap;
            transition: all var(--transition);
            flex-shrink: 0;
        }

        .nav-link-card:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary);
            text-decoration: none;
        }

        .nav-link-card.active {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary);
            font-weight: 600;
        }

        .nav-link-icon {
            font-size: 0.9rem;
            opacity: 0.8;
        }

        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.9rem;
            border: none;
            cursor: pointer;
            text-decoration: none;
            white-space: nowrap;
            flex-shrink: 0;
            transition: all var(--transition);
        }

        .nav-cta-btn:hover {
            background: var(--primary-dark);
            color: #fff;
            text-decoration: none;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(31, 111, 235, 0.25);
        }

        .nav-hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--text-main);
            padding: 8px;
            border-radius: 8px;
        }

        .mobile-nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(15, 30, 61, 0.5);
            z-index: 199;
        }

        .mobile-nav-drawer {
            display: none;
            position: fixed;
            top: 0;
            right: 0;
            bottom: 0;
            width: 300px;
            max-width: 85vw;
            background: var(--card-bg);
            z-index: 200;
            padding: 20px;
            border-radius: 16px 0 0 16px;
            box-shadow: -8px 0 30px rgba(0, 0, 0, 0.1);
            overflow-y: auto;
        }

        .mobile-nav-drawer.open {
            display: block;
        }

        .mobile-nav-overlay.open {
            display: block;
        }

        .mobile-drawer-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 20px;
        }
        .mobile-drawer-close {
            background: none;
            border: none;
            font-size: 1.6rem;
            cursor: pointer;
            color: var(--text-secondary);
            padding: 4px 8px;
        }
        .mobile-drawer-links {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .mobile-drawer-links .nav-link-card {
            width: 100%;
            justify-content: flex-start;
        }

        /* ========== HERO ========== */
        .hero-section {
            padding: 40px 0 20px;
        }

.hero-inner {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 36px;
            align-items: center;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 48px 42px;
            position: relative;
            overflow: hidden;
        }
        .hero-inner::after {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 220px;
            height: 220px;
            background: radial-gradient(circle, rgba(31,111,235,0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-content {
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #FFF7E6;
            color: #B46F00;
            padding: 8px 14px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 18px;
            border: 1px solid #F5D48A;
        }
        .hero-badge-icon {
            font-size: 1rem;
        }
        .hero-title {
            font-size: 2.8rem;
            line-height: 1.25;
            font-weight: 700;
            letter-spacing: -0.5px;
            color: var(--text-main);
            margin-bottom: 18px;
        }
        .hero-title .highlight {
            color: var(--primary);
            position: relative;
        }
        .hero-title .highlight-accent {
            color: var(--accent);
        }
        .hero-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 28px;
            max-width: 90%;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 28px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 26px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.95rem;
            text-decoration: none;
            transition: all var(--transition);
            cursor: pointer;
            border: 1px solid transparent;
            line-height: 1.4;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(31,111,235,0.25);
            color: #fff;
            text-decoration: none;
        }
        .btn-secondary {
            background: #fff;
            color: var(--text-main);
            border-color: var(--border);
        }
        .btn-secondary:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
            text-decoration: none;
        }
        .btn-accent {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
        }
        .btn-accent:hover {
            background: var(--accent-hover);
            border-color: var(--accent-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(217,142,4,0.3);
            text-decoration: none;
        }
        .hero-stats {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            border-top: 1px solid var(--border);
            padding-top: 20px;
        }
        .hero-stat-item {
            display: flex;
            flex-direction: column;
        }
        .hero-stat-number {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
        }
        .hero-stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .hero-visual {
            position: relative;
            z-index: 2;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            background: #EAF0FA;
            min-height: 380px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .hero-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-card);
        }
        .hero-floating-card {
            position: absolute;
            bottom: 20px;
            left: 20px;
            background: rgba(255,255,255,0.95);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 14px 18px;
            box-shadow: var(--shadow-card);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .hero-floating-card-icon {
            width: 40px;
            height: 40px;
            background: var(--primary-light);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.2rem;
            flex-shrink: 0;
        }
        .hero-floating-card-text {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.4;
        }
        .hero-floating-card-text strong {
            color: var(--text-main);
            display: block;
            font-size: 0.95rem;
        }

        /* ========== SECTION GENERAL ========== */
        .section {
            padding: 48px 0;
        }
        .section-header {
            max-width: 720px;
            margin-bottom: 32px;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 1px;
            text-transform: uppercase;
            color: var(--accent);
            margin-bottom: 8px;
        }

        /* ========== SELLING POINTS ========== */
        .selling-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .selling-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            position: relative;
        }
        .selling-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-card-hover);
            border-color: #C9D9F0;
        }
        .selling-card-number {
            font-size: 1rem;
            font-weight: 700;
            color: var(--accent);
            margin-bottom: 12px;
        }
        .selling-card-icon {
            width: 50px;
            height: 50px;
            background: var(--primary-light);
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            margin-bottom: 18px;
            color: var(--primary);
        }
        .selling-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-main);
        }
        .selling-card p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.8;
            margin-bottom: 18px;
            flex: 1;
        }
        .selling-card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            color: var(--primary);
            text-decoration: none;
            font-size: 0.9rem;
            transition: gap var(--transition);
        }
        .selling-card-link:hover {
            gap: 10px;
            text-decoration: none;
        }

        /* ========== SCENARIO DEMO ========== */
        .scenario-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            display: grid;
            grid-template-columns: 1fr 1fr;
        }
        .scenario-visual {
            position: relative;
            min-height: 360px;
            background: #EAF0FA;
        }
        .scenario-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
        }
        .scenario-content {
            padding: 38px 32px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .scenario-steps {
            display: flex;
            flex-direction: column;
            gap: 16px;
            margin-top: 20px;
        }
        .scenario-step {
            display: flex;
            gap: 14px;
            align-items: flex-start;
        }
        .scenario-step-number {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9rem;
            flex-shrink: 0;
            margin-top: 2px;
        }
        .scenario-step-text h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 4px;
            color: var(--text-main);
        }
        .scenario-step-text p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ========== DEEP CONTENT ========== */
        .deep-content-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .deep-content-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 28px 26px;
            box-shadow: var(--shadow-card);
        }
        .deep-content-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 14px;
            color: var(--text-main);
        }
        .deep-content-card p {
            color: var(--text-secondary);
            line-height: 1.9;
            font-size: 0.98rem;
            margin-bottom: 12px;
        }

        /* ========== NEWS ========== */
        .news-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .news-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 20px;
            display: flex;
            gap: 16px;
            align-items: flex-start;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
        }
        .news-item:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .news-date-badge {
            display: flex;
            flex-direction: column;
            align-items: center;
            background: var(--primary-light);
            border-radius: 10px;
            padding: 8px 12px;
            min-width: 58px;
            flex-shrink: 0;
        }
        .news-date-day {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
        }
        .news-date-month {
            font-size: 0.75rem;
            color: var(--primary);
        }
        .news-content {
            flex: 1;
        }
        .news-content h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-main);
        }
        .news-content p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 8px;
        }
        .news-readmore {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
            text-decoration: none;
        }
        .news-readmore:hover {
            text-decoration: underline;
        }

        /* ========== BRAND INTRO ========== */
        .brand-intro-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 32px 30px;
            box-shadow: var(--shadow-card);
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
        }
        .brand-intro-text p {
            color: var(--text-secondary);
            line-height: 2;
            font-size: 1rem;
            margin-bottom: 16px;
        }

        /* ========== SOCIAL PROOF ========== */
        .proof-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .proof-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 22px;
            text-align: center;
            box-shadow: var(--shadow-card);
        }
        .proof-card .proof-number {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary);
        }
        .proof-card .proof-label {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-top: 4px;
        }
        .proof-logos {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 30px;
            margin-top: 24px;
            opacity: 0.7;
        }
        .proof-logo-item {
            font-weight: 700;
            color: var(--text-secondary);
            font-size: 1rem;
            letter-spacing: 1px;
        }

        /* ========== FAQ ========== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 14px;
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
        }
        .faq-question {
            padding: 18px 22px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            color: var(--text-main);
            background: #fff;
            border: none;
            width: 100%;
            text-align: left;
            font-size: 1rem;
        }
        .faq-question:hover {
            background: var(--primary-light);
        }
        .faq-icon {
            transition: transform var(--transition);
            font-size: 1.2rem;
            color: var(--primary);
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            padding: 0 22px 18px;
            color: var(--text-secondary);
            line-height: 1.8;
            font-size: 0.95rem;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ========== CTA SECTION ========== */
        .cta-card {
            background: var(--primary);
            border-radius: var(--radius-card);
            padding: 46px 38px;
            color: #fff;
            box-shadow: 0 12px 30px rgba(31,111,235,0.25);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 30px;
            flex-wrap: wrap;
        }
        .cta-card h3 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: #fff;
        }
        .cta-card p {
            color: rgba(255,255,255,0.9);
            font-size: 1rem;
            max-width: 500px;
        }
        .cta-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .btn-white {
            background: #fff;
            color: var(--primary);
            border: none;
        }
        .btn-white:hover {
            background: #EAF0FA;
            color: var(--primary-dark);
            transform: translateY(-2px);
        }

        /* ========== BOTTOM FIXED BAR ========== */
        .bottom-fixed-bar {
            position: fixed;
            bottom: 18px;
            left: 50%;
            transform: translateX(-50%);
            width: min(92%, 700px);
            background: rgba(15,30,61,0.95);
            border-radius: 18px;
            padding: 10px 16px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            z-index: 150;
            box-shadow: 0 8px 24px rgba(15,30,61,0.3);
            backdrop-filter: blur(10px);
            transition: opacity var(--transition), transform var(--transition);
        }
        .bottom-fixed-bar.hidden {
            opacity: 0;
            pointer-events: none;
            transform: translateX(-50%) translateY(20px);
        }
        .bottom-fixed-text {
            color: #fff;
            font-size: 0.9rem;
            font-weight: 500;
            white-space: nowrap;
        }
        .bottom-fixed-actions {
            display: flex;
            gap: 10px;
            align-items: center;
        }
        .bottom-fixed-actions .btn {
            padding: 8px 16px;
            font-size: 0.85rem;
        }
        .bottom-fixed-phone {
            color: #fff;
            text-decoration: none;
            font-weight: 600;
            font-size: 0.9rem;
            white-space: nowrap;
        }
        .bottom-fixed-phone:hover {
            text-decoration: underline;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #0F1E3D;
            color: rgba(255,255,255,0.8);
            padding: 46px 0 100px;
            margin-top: 20px;
        }
        .footer-container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 28px;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr 1fr;
            gap: 30px;
            padding-bottom: 30px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 14px;
        }
        .footer-col a,
        .footer-col p {
            color: rgba(255,255,255,0.7);
            text-decoration: none;
            font-size: 0.9rem;
            line-height: 2;
            display: block;
        }
        .footer-col a:hover {
            color: #fff;
            text-decoration: underline;
        }
        .footer-bottom {
            padding-top: 24px;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.6);
        }
        .footer-bottom a {
            color: rgba(255,255,255,0.8);
            text-decoration: none;
        }
        .footer-bottom a:hover {
            color: #fff;
            text-decoration: underline;
        }
        .footer-sep {
            margin: 0 8px;
            opacity: 0.5;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .container {
                padding: 0 20px;
            }
            .nav-links {
                gap: 6px;
            }
            .nav-link-card {
                padding: 8px 10px;
                font-size: 0.8rem;
            }
            .hero-inner {
                padding: 36px 28px;
                gap: 24px;
            }
            .hero-title {
                font-size: 2.2rem;
            }
            .selling-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 16px;
            }
            .scenario-card {
                grid-template-columns: 1fr;
            }
            .deep-content-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-panel {
                padding: 10px 14px;
            }
            .nav-links {
                display: none;
            }
            .nav-cta-btn span {
                display: none;
            }
            .nav-hamburger {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }
            .hero-inner {
                grid-template-columns: 1fr;
                padding: 28px 20px;
            }
            .hero-subtitle {
                max-width: 100%;
            }
            .hero-visual {
                min-height: 240px;
                order: -1;
            }
            .selling-grid {
                grid-template-columns: 1fr;
            }
            .news-list {
                grid-template-columns: 1fr;
            }
            .proof-grid {
                grid-template-columns: 1fr;
            }
            .footer-top {
                grid-template-columns: 1fr 1fr;
            }
            .bottom-fixed-bar {
                bottom: 10px;
                padding: 8px 12px;
                width: 96%;
            }
            .bottom-fixed-text {
                font-size: 0.8rem;
            }
            .cta-card {
                padding: 28px 20px;
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .nav-logo-text {
                font-size: 1.1rem;
            }
            .nav-cta-btn {
                padding: 8px 14px;
                font-size: 0.8rem;
            }
            .hero-title {
                font-size: 1.8rem;
            }
            .hero-subtitle {
                font-size: 0.95rem;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .selling-card {
                padding: 20px;
            }
            .scenario-content {
                padding: 24px 18px;
            }
            .footer-top {
                grid-template-columns: 1fr;
            }
            .bottom-fixed-bar {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
                height: auto;
                max-height: 70px;
            }
            .bottom-fixed-actions {
                width: 100%;
                justify-content: space-between;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #1F6FEB;
            --primary-dark: #1B5FD0;
            --primary-light: #EEF4FF;
            --accent: #D98E04;
            --accent-hover: #C07D03;
            --accent-light: #FFF6E8;
            --bg: #F6F8FC;
            --card-bg: #FFFFFF;
            --border: #E6EDF6;
            --text-main: #1A2233;
            --text-secondary: #54647A;
            --text-muted: #7A879B;
            --danger: #D33A3A;
            --radius-card: 16px;
            --radius-img: 12px;
            --radius-btn: 10px;
            --radius-pill: 24px;
            --shadow-card: 0 4px 20px rgba(20, 40, 80, 0.06);
            --shadow-card-hover: 0 8px 28px rgba(20, 40, 80, 0.10);
            --shadow-nav: 0 2px 16px rgba(20, 40, 80, 0.05);
            --shadow-accent: 0 6px 20px rgba(217, 142, 4, 0.25);
            --transition: 0.2s ease;
            --container: 1200px;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-main);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-img);
        }

        a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
            transition: color var(--transition);
        }

        a:hover {
            color: var(--primary-dark);
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 3px solid rgba(31, 111, 235, 0.35);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 28px;
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            padding-top: 18px;
            position: relative;
            z-index: 100;
        }

        .nav-panel {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-nav);
            padding: 14px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: nowrap;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            text-decoration: none;
        }

        .nav-logo-icon {
            width: 42px;
            height: 42px;
            background: var(--primary);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 20px;
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }

        .nav-logo-text {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.2;
            letter-spacing: 0.5px;
        }

        .nav-logo-text span {
            color: var(--primary);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
            flex-shrink: 1;
            min-width: 0;
            padding: 2px 4px;
        }

        .nav-links::-webkit-scrollbar {
            display: none;
        }

        .nav-link-card {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 14px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 10px;
            font-size: 0.86rem;
            font-weight: 500;
            color: var(--text-secondary);
            text-decoration: none;
            white-space: nowrap;
            transition: all var(--transition);
            flex-shrink: 0;
        }

        .nav-link-card:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary);
            text-decoration: none;
        }

        .nav-link-card.active {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary);
            font-weight: 600;
        }

        .nav-link-icon {
            font-size: 0.9rem;
            opacity: 0.8;
        }

        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.9rem;
            border: none;
            cursor: pointer;
            text-decoration: none;
            white-space: nowrap;
            flex-shrink: 0;
            transition: all var(--transition);
        }

        .nav-cta-btn:hover {
            background: var(--primary-dark);
            color: #fff;
            text-decoration: none;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(31, 111, 235, 0.25);
        }

        .nav-hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--text-main);
            padding: 8px;
            border-radius: 8px;
        }

        /* ========== BREADCRUMB ========== */
        .breadcrumb {
            padding: 28px 0 0;
        }

        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            font-size: 0.88rem;
            color: var(--text-muted);
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 10px 18px;
            box-shadow: var(--shadow-card);
        }

        .breadcrumb-nav a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: color var(--transition);
        }

        .breadcrumb-nav a:hover {
            color: var(--primary);
        }

        .breadcrumb-sep {
            color: var(--text-muted);
            opacity: 0.6;
            user-select: none;
        }

        .breadcrumb-current {
            color: var(--primary);
            font-weight: 600;
        }

        /* ========== PAGE HERO ========== */
        .page-hero {
            padding: 36px 0 24px;
        }

        .page-hero-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 36px 40px;
        }

        .page-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--accent-light);
            border: 1px solid #F7E5C2;
            color: var(--accent-hover);
            font-size: 0.82rem;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            margin-bottom: 16px;
        }

        .page-hero h1 {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 14px;
            line-height: 1.3;
            letter-spacing: 0.5px;
        }

        .page-hero-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 800px;
            margin: 0;
            line-height: 1.8;
        }

        /* ========== CONTRAST SELECTION HERO ========== */
        .contrast-hero {
            padding: 24px 0 48px;
        }

        .contrast-hero-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 36px 40px;
        }

        .contrast-hero-header {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 20px;
            margin-bottom: 28px;
        }

        .contrast-hero-header h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 0;
            line-height: 1.4;
        }

        .contrast-hero-note {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin: 6px 0 0;
        }

        .contrast-hero-highlight {
            background: var(--accent-light);
            border: 1px solid #F7E5C2;
            border-radius: 10px;
            padding: 10px 18px;
            font-size: 0.88rem;
            color: var(--accent-hover);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .contrast-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
        }

        .contrast-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 14px;
            padding: 22px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            transition: all var(--transition);
            position: relative;
        }

        .contrast-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }

        .contrast-card.recommended {
            border-color: var(--accent);
            background: #FFFDF8;
            box-shadow: var(--shadow-accent);
        }

        .contrast-card-recommend-badge {
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--accent);
            color: #fff;
            font-size: 0.78rem;
            font-weight: 700;
            padding: 4px 14px;
            border-radius: var(--radius-pill);
            white-space: nowrap;
            letter-spacing: 0.5px;
        }

        .contrast-card-name {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-main);
        }

        .contrast-card-price {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary);
        }

        .contrast-card-price .price-unit {
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-muted);
        }

        .contrast-card-features {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 6px;
            flex: 1;
        }

        .contrast-card-features li {
            font-size: 0.85rem;
            color: var(--text-secondary);
            display: flex;
            align-items: flex-start;
            gap: 6px;
        }

        .contrast-card-features li::before {
            content: "✓";
            color: var(--primary);
            font-weight: 700;
            flex-shrink: 0;
        }

        .contrast-card-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            padding: 10px 16px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.88rem;
            text-decoration: none;
            transition: all var(--transition);
            border: 1px solid var(--primary);
            background: #fff;
            color: var(--primary);
            cursor: pointer;
        }

        .contrast-card-btn:hover {
            background: var(--primary-light);
            text-decoration: none;
            color: var(--primary);
        }

        .contrast-card.recommended .contrast-card-btn {
            background: var(--accent);
            border-color: var(--accent);
            color: #fff;
        }

        .contrast-card.recommended .contrast-card-btn:hover {
            background: var(--accent-hover);
            border-color: var(--accent-hover);
            color: #fff;
            text-decoration: none;
        }

        /* ========== SECTION COMMON ========== */
        .section {
            padding: 36px 0;
        }

        .section-header {
            margin-bottom: 28px;
        }

        .section-header h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 8px;
            line-height: 1.4;
        }

        .section-header p {
            color: var(--text-secondary);
            margin: 0;
            font-size: 1rem;
        }

        /* ========== GRID CARDS SECTION ========== */
        .grid-cards-section {
            padding: 36px 0;
        }

        .program-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
        }

        .program-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: all var(--transition);
        }

        .program-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }

        .program-card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 0;
        }

        .program-card-body {
            padding: 22px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            flex: 1;
        }

        .program-card-tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 0.78rem;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            align-self: flex-start;
        }

        .program-card-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 0;
            line-height: 1.4;
        }

        .program-card-desc {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.7;
            flex: 1;
        }

        .program-card-link {
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--primary);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: color var(--transition);
        }

        .program-card-link:hover {
            color: var(--primary-dark);
        }

        /* ========== DEEP CONTENT ========== */
        .deep-content {
            padding: 36px 0;
        }

        .deep-content-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 36px 40px;
        }

        .deep-content-card h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 18px;
        }

        .deep-content-card p {
            color: var(--text-secondary);
            margin: 0 0 16px;
            line-height: 1.85;
            font-size: 0.98rem;
        }

        .deep-content-card p:last-child {
            margin-bottom: 0;
        }

        /* ========== RELATED RECOMMEND ========== */
        .related-section {
            padding: 36px 0;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 18px;
        }

        .related-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 14px;
            box-shadow: var(--shadow-card);
            padding: 22px;
            display: flex;
            gap: 16px;
            align-items: flex-start;
            transition: all var(--transition);
            text-decoration: none;
        }

        .related-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .related-card-img {
            width: 80px;
            height: 80px;
            object-fit: cover;
            border-radius: 10px;
            flex-shrink: 0;
        }

        .related-card-content h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 6px;
            line-height: 1.4;
        }

        .related-card-content p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.6;
        }

        /* ========== FAQ ========== */
        .faq-section {
            padding: 36px 0;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 14px;
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item.open {
            border-color: var(--primary);
            background: var(--primary-light);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 18px 22px;
            cursor: pointer;
            font-weight: 600;
            color: var(--text-main);
            font-size: 1rem;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: color var(--transition);
        }

        .faq-question:hover {
            color: var(--primary);
        }

        .faq-question-icon {
            flex-shrink: 0;
            width: 26px;
            height: 26px;
            border-radius: 50%;
            background: var(--bg);
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            color: var(--primary);
            transition: all var(--transition);
            user-select: none;
        }

        .faq-item.open .faq-question-icon {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            padding: 0 22px;
        }

        .faq-item.open .faq-answer {
            max-height: 500px;
            padding: 0 22px 20px;
        }

        .faq-answer p {
            margin: 0;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.8;
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            padding: 40px 0 60px;
        }

        .cta-card {
            background: var(--primary);
            border-radius: var(--radius-card);
            box-shadow: 0 10px 32px rgba(31, 111, 235, 0.28);
            padding: 40px 44px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 24px;
        }

        .cta-card h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: #fff;
            margin: 0 0 8px;
            line-height: 1.4;
        }

        .cta-card p {
            color: rgba(255, 255, 255, 0.88);
            margin: 0;
            font-size: 0.98rem;
        }

        .cta-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .cta-btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 12px 24px;
            background: #fff;
            color: var(--primary);
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 0.95rem;
            text-decoration: none;
            transition: all var(--transition);
            border: none;
            cursor: pointer;
        }

        .cta-btn-primary:hover {
            background: var(--primary-light);
            color: var(--primary);
            text-decoration: none;
            transform: translateY(-1px);
        }

        .cta-btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 12px 24px;
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.65);
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.95rem;
            text-decoration: none;
            transition: all var(--transition);
            cursor: pointer;
        }

        .cta-btn-secondary:hover {
            background: rgba(255, 255, 255, 0.12);
            text-decoration: none;
            color: #fff;
            border-color: #fff;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #0F1E3D;
            color: rgba(255, 255, 255, 0.78);
            padding: 48px 0 28px;
            margin-top: 20px;
        }

        .footer-container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 28px;
        }

        .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin: 0 0 14px;
        }

        .footer-col p {
            font-size: 0.88rem;
            line-height: 1.7;
            margin: 0 0 8px;
            color: rgba(255, 255, 255, 0.68);
        }

        .footer-col a {
            display: block;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.68);
            text-decoration: none;
            margin-bottom: 8px;
            transition: color var(--transition);
        }

        .footer-col a:hover {
            color: #fff;
            text-decoration: underline;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 20px;
            display: flex;
            flex-direction: column;
            gap: 6px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.55);
        }

        .footer-bottom p {
            margin: 0;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.7);
            text-decoration: none;
        }

        .footer-bottom a:hover {
            color: #fff;
            text-decoration: underline;
        }

        .footer-sep {
            margin: 0 6px;
            opacity: 0.5;
        }

        /* ========== BOTTOM FIXED CONVERSION BAR ========== */
        .bottom-fixed-bar {
            position: fixed;
            bottom: 16px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 90;
            width: calc(100% - 40px);
            max-width: 720px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 14px;
            box-shadow: 0 8px 30px rgba(20, 40, 80, 0.16);
            padding: 12px 18px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            transition: opacity 0.3s ease, transform 0.3s ease;
        }

        .bottom-fixed-bar.hidden {
            opacity: 0;
            pointer-events: none;
            transform: translateX(-50%) translateY(20px);
        }

        .bottom-bar-text {
            font-size: 0.85rem;
            color: var(--text-secondary);
            flex: 1;
            line-height: 1.4;
        }

        .bottom-bar-text strong {
            color: var(--text-main);
            font-weight: 700;
        }

        .bottom-bar-actions {
            display: flex;
            gap: 8px;
            flex-wrap: nowrap;
            flex-shrink: 0;
        }

        .bottom-bar-btn {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 8px 16px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 0.82rem;
            text-decoration: none;
            white-space: nowrap;
            transition: all var(--transition);
            cursor: pointer;
            border: none;
        }

        .bottom-bar-btn.primary {
            background: var(--primary);
            color: #fff;
        }

        .bottom-bar-btn.primary:hover {
            background: var(--primary-dark);
            text-decoration: none;
            color: #fff;
        }

        .bottom-bar-btn.accent {
            background: var(--accent);
            color: #fff;
        }

        .bottom-bar-btn.accent:hover {
            background: var(--accent-hover);
            text-decoration: none;
            color: #fff;
        }

        /* ========== MOBILE NAV ========== */
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(15, 30, 61, 0.55);
            z-index: 200;
            opacity: 0;
            transition: opacity 0.25s ease;
        }

        .mobile-nav-overlay.show {
            display: block;
            opacity: 1;
        }

        .mobile-nav-drawer {
            position: fixed;
            top: 0;
            right: -100%;
            width: 88%;
            max-width: 360px;
            height: 100vh;
            background: var(--card-bg);
            z-index: 210;
            transition: right 0.3s ease;
            overflow-y: auto;
            padding: 24px 20px;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .mobile-nav-drawer.open {
            right: 0;
        }

        .mobile-nav-drawer-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 12px;
        }

        .mobile-nav-drawer-close {
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--text-main);
            padding: 6px;
            border-radius: 8px;
        }

        .mobile-nav-drawer .nav-link-card {
            display: flex;
            width: 100%;
            padding: 12px 16px;
            font-size: 0.95rem;
        }

        .mobile-nav-drawer .nav-cta-btn {
            display: flex;
            justify-content: center;
            width: 100%;
            padding: 12px 20px;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .contrast-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .program-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-top {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 18px;
            }

            .nav-links {
                display: none;
            }

            .nav-hamburger {
                display: block;
            }

            .nav-cta-btn {
                display: none;
            }

            .page-hero-card {
                padding: 24px 22px;
            }

            .page-hero h1 {
                font-size: 1.7rem;
            }

            .contrast-hero-card {
                padding: 24px 22px;
            }

            .contrast-hero-header {
                flex-direction: column;
            }

            .contrast-grid {
                grid-template-columns: 1fr;
            }

            .program-grid {
                grid-template-columns: 1fr;
            }

            .related-grid {
                grid-template-columns: 1fr;
            }

            .cta-card {
                padding: 28px 24px;
                flex-direction: column;
                align-items: flex-start;
            }

            .cta-actions {
                width: 100%;
            }

            .cta-actions a,
            .cta-actions button {
                flex: 1;
                justify-content: center;
            }

            .footer-top {
                grid-template-columns: 1fr;
                gap: 22px;
            }

            .bottom-fixed-bar {
                bottom: 8px;
                width: calc(100% - 16px);
                padding: 10px 14px;
                flex-direction: column;
                align-items: stretch;
                gap: 8px;
            }

            .bottom-bar-actions {
                width: 100%;
                justify-content: stretch;
            }

            .bottom-bar-btn {
                flex: 1;
                justify-content: center;
                padding: 8px 12px;
                font-size: 0.78rem;
            }

            .bottom-bar-text {
                font-size: 0.78rem;
                text-align: center;
            }

            .deep-content-card {
                padding: 24px 22px;
            }
        }

        @media (max-width: 520px) {
            .page-hero h1 {
                font-size: 1.45rem;
            }

            .page-hero-desc {
                font-size: 0.95rem;
            }

            .section-header h2 {
                font-size: 1.3rem;
            }

            .contrast-card {
                padding: 18px;
            }

            .program-card-img {
                height: 160px;
            }

            .bottom-fixed-bar {
                bottom: 4px;
                width: calc(100% - 8px);
                border-radius: 10px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #1F6FEB;
            --primary-dark: #1B5FD0;
            --primary-light: #EEF4FF;
            --accent: #D98E04;
            --accent-hover: #C07D03;
            --bg: #F6F8FC;
            --card-bg: #FFFFFF;
            --border: #E6EDF6;
            --text-main: #1A2233;
            --text-secondary: #54647A;
            --text-muted: #7A879B;
            --danger: #D33A3A;
            --radius-card: 16px;
            --radius-img: 12px;
            --radius-btn: 10px;
            --radius-pill: 24px;
            --shadow-card: 0 4px 20px rgba(20, 40, 80, 0.06);
            --shadow-card-hover: 0 8px 28px rgba(20, 40, 80, 0.10);
            --shadow-nav: 0 2px 16px rgba(20, 40, 80, 0.05);
            --transition: 0.2s ease;
            --container: 1200px;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-main);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-img);
        }

        a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
            transition: color var(--transition);
        }

        a:hover {
            color: var(--primary-dark);
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 3px solid rgba(31, 111, 235, 0.35);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 28px;
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            padding-top: 18px;
            position: relative;
            z-index: 100;
        }

        .nav-panel {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-nav);
            padding: 14px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: nowrap;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            text-decoration: none;
        }

        .nav-logo:hover {
            text-decoration: none;
        }

        .nav-logo-icon {
            width: 42px;
            height: 42px;
            background: var(--primary);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 20px;
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }

        .nav-logo-text {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.2;
            letter-spacing: 0.5px;
        }

        .nav-logo-text span {
            color: var(--primary);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
            flex-shrink: 1;
            min-width: 0;
            padding: 2px 4px;
        }

        .nav-links::-webkit-scrollbar {
            display: none;
        }

        .nav-link-card {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 14px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 10px;
            font-size: 0.86rem;
            font-weight: 500;
            color: var(--text-secondary);
            text-decoration: none;
            white-space: nowrap;
            transition: all var(--transition);
            flex-shrink: 0;
        }

        .nav-link-card:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary);
            text-decoration: none;
        }

        .nav-link-card.active {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary);
            font-weight: 600;
        }

        .nav-link-icon {
            font-size: 0.9rem;
            opacity: 0.8;
        }

        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.9rem;
            border: none;
            cursor: pointer;
            text-decoration: none;
            white-space: nowrap;
            flex-shrink: 0;
            transition: all var(--transition);
        }

        .nav-cta-btn:hover {
            background: var(--primary-dark);
            color: #fff;
            text-decoration: none;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(31, 111, 235, 0.25);
        }

        .nav-hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--text-main);
            padding: 8px;
            border-radius: 8px;
            flex-shrink: 0;
        }

        .mobile-nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(15, 30, 61, 0.5);
            z-index: 199;
        }

        .mobile-nav-drawer {
            display: none;
            position: fixed;
            top: 0;
            right: 0;
            bottom: 0;
            width: 310px;
            max-width: 85vw;
            background: var(--card-bg);
            z-index: 200;
            border-radius: 20px 0 0 20px;
            box-shadow: -8px 0 32px rgba(15, 30, 61, 0.18);
            padding: 20px 16px;
            overflow-y: auto;
            flex-direction: column;
            gap: 10px;
        }

        .mobile-nav-drawer.open {
            display: flex;
        }

        .mobile-nav-overlay.open {
            display: block;
        }

        .mobile-nav-close {
            align-self: flex-end;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 6px 12px;
            font-size: 1rem;
            cursor: pointer;
            color: var(--text-main);
        }

        .mobile-nav-drawer .nav-link-card {
            display: flex;
            padding: 12px 16px;
            font-size: 0.95rem;
        }

        .mobile-nav-drawer .nav-cta-btn {
            justify-content: center;
            margin-top: 8px;
        }

        /* ========== BREADCRUMB ========== */
        .breadcrumb-section {
            padding-top: 24px;
            padding-bottom: 8px;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .breadcrumb a {
            color: var(--text-muted);
            text-decoration: none;
            transition: color var(--transition);
        }

        .breadcrumb a:hover {
            color: var(--primary);
            text-decoration: underline;
        }

        .breadcrumb .sep {
            color: var(--text-muted);
            font-size: 0.75rem;
        }

        .breadcrumb .current {
            color: var(--primary);
            font-weight: 600;
        }

        /* ========== PAGE HERO ========== */
        .page-hero {
            padding: 40px 0 48px;
        }

        .page-hero-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 40px 42px;
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            align-items: center;
            justify-content: space-between;
            position: relative;
            overflow: hidden;
        }

        .page-hero-card::after {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 220px;
            height: 220px;
            background: radial-gradient(circle, rgba(31, 111, 235, 0.08), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .page-hero-text {
            flex: 1 1 480px;
            position: relative;
            z-index: 1;
        }

        .page-hero-text h1 {
            font-size: 2.1rem;
            font-weight: 700;
            line-height: 1.35;
            color: var(--text-main);
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

        .page-hero-text h1 .highlight {
            color: var(--primary);
        }

        .page-hero-text .hero-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 24px;
            max-width: 720px;
        }

        .page-hero-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 8px;
        }

        .badge-item {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary-light);
            border: 1px solid var(--border);
            border-radius: var(--radius-pill);
            padding: 8px 16px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--primary);
        }

        .badge-item .badge-dot {
            width: 6px;
            height: 6px;
            background: var(--accent);
            border-radius: 50%;
            flex-shrink: 0;
        }

        .page-hero-img {
            flex: 0 0 340px;
            position: relative;
            z-index: 1;
        }

        .page-hero-img img {
            width: 100%;
            border-radius: var(--radius-img);
            box-shadow: var(--shadow-card);
            aspect-ratio: 4 / 3;
            object-fit: cover;
        }

        .page-hero-img .img-tag {
            position: absolute;
            top: 16px;
            left: 16px;
            background: rgba(255, 255, 255, 0.92);
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 8px 14px;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--primary);
            box-shadow: var(--shadow-card);
        }

        /* ========== MAIN LAYOUT ========== */
        .main-section {
            padding: 32px 0 64px;
        }

        .main-layout {
            display: flex;
            gap: 32px;
            align-items: flex-start;
        }

        /* Sidebar filter */
        .filter-sidebar {
            flex: 0 0 270px;
            position: sticky;
            top: 20px;
        }

        .filter-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 22px 20px;
        }

        .filter-card h2 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 18px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--border);
            letter-spacing: 0.3px;
        }

        .filter-group {
            margin-bottom: 20px;
        }

        .filter-group:last-child {
            margin-bottom: 0;
        }

        .filter-group label {
            display: block;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-secondary);
            margin-bottom: 10px;
        }

        .filter-option {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 7px 10px;
            border-radius: 8px;
            cursor: pointer;
            transition: background var(--transition);
            font-size: 0.88rem;
            color: var(--text-secondary);
        }

        .filter-option:hover {
            background: var(--primary-light);
        }

        .filter-option input[type="radio"],
        .filter-option input[type="checkbox"] {
            accent-color: var(--primary);
            width: 16px;
            height: 16px;
            cursor: pointer;
            flex-shrink: 0;
        }

        .filter-option .count {
            margin-left: auto;
            font-size: 0.75rem;
            color: var(--text-muted);
            background: var(--bg);
            border-radius: 10px;
            padding: 2px 8px;
        }

        .filter-reset-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            width: 100%;
            padding: 10px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-btn);
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-secondary);
            cursor: pointer;
            transition: all var(--transition);
            margin-top: 16px;
        }

        .filter-reset-btn:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary);
        }

        /* Article list */
        .article-list-area {
            flex: 1 1 auto;
            min-width: 0;
        }

        .article-list-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 20px;
            padding: 12px 4px;
        }

        .article-list-header .result-count {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-secondary);
        }

        .article-list-header .sort-btns {
            display: flex;
            gap: 8px;
        }

        .sort-btn {
            padding: 7px 14px;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-btn);
            font-size: 0.82rem;
            font-weight: 500;
            color: var(--text-secondary);
            cursor: pointer;
            transition: all var(--transition);
        }

        .sort-btn:hover,
        .sort-btn.active {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary);
        }

        .article-item-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 20px;
            display: flex;
            gap: 20px;
            margin-bottom: 18px;
            transition: all var(--transition);
        }

        .article-item-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .article-item-img {
            flex: 0 0 200px;
            border-radius: var(--radius-img);
            overflow: hidden;
            align-self: stretch;
            min-height: 140px;
        }

        .article-item-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-img);
        }

        .article-item-body {
            flex: 1;
            display: flex;
            flex-direction: column;
            min-width: 0;
        }

        .article-item-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
            margin-bottom: 8px;
        }

        .article-item-date {
            font-size: 0.8rem;
            color: var(--text-muted);
            background: var(--bg);
            border-radius: 8px;
            padding: 3px 10px;
        }

        .article-item-tag {
            font-size: 0.78rem;
            font-weight: 500;
            color: var(--primary);
            background: var(--primary-light);
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 3px 10px;
        }

        .article-item-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.5;
            margin-bottom: 8px;
            letter-spacing: 0.3px;
        }

        .article-item-title a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }

        .article-item-title a:hover {
            color: var(--primary);
            text-decoration: none;
        }

        .article-item-excerpt {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 12px;
            flex: 1;
        }

        .article-item-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
        }

        .article-read-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--primary);
            text-decoration: none;
            transition: all var(--transition);
        }

        .article-read-more:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }

        .article-read-more .arrow {
            font-size: 0.8rem;
            transition: transform var(--transition);
        }

        .article-read-more:hover .arrow {
            transform: translateX(3px);
        }

        /* Pagination */
        .pagination {
            display: flex;
            align-items: center;
            gap: 8px;
            justify-content: center;
            margin-top: 28px;
            flex-wrap: wrap;
        }

        .page-btn {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 10px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
        }

        .page-btn:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary);
        }

        .page-btn.active {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            font-weight: 600;
        }

        .page-btn.disabled {
            opacity: 0.5;
            pointer-events: none;
        }

        /* ========== DEEP CONTENT SECTION ========== */
        .deep-content-section {
            padding: 48px 0 56px;
            background: var(--card-bg);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .deep-content-card {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 36px 40px;
            box-shadow: var(--shadow-card);
        }

        .deep-content-card h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 20px;
            letter-spacing: 0.4px;
        }

        .deep-content-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary);
            margin: 24px 0 12px;
            letter-spacing: 0.3px;
        }

        .deep-content-card p {
            font-size: 0.98rem;
            color: var(--text-secondary);
            line-height: 1.9;
            margin-bottom: 16px;
        }

        .deep-content-card ul {
            list-style: none;
            padding-left: 4px;
            margin-bottom: 16px;
        }

        .deep-content-card ul li {
            position: relative;
            padding-left: 24px;
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 8px;
        }

        .deep-content-card ul li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 10px;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--accent);
            opacity: 0.8;
        }

        /* ========== STATS SECTION ========== */
        .stats-section {
            padding: 48px 0;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .stat-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 26px 22px;
            text-align: center;
            transition: all var(--transition);
        }

        .stat-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }

        .stat-number {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
            letter-spacing: 0.5px;
        }

        .stat-number .stat-unit {
            font-size: 1rem;
            font-weight: 600;
            color: var(--accent);
            margin-left: 2px;
        }

        .stat-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-top: 8px;
            font-weight: 500;
        }

        /* ========== FAQ ========== */
        .faq-section {
            padding: 48px 0 56px;
        }

        .section-header {
            margin-bottom: 28px;
        }

        .section-header h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-main);
            letter-spacing: 0.4px;
            margin-bottom: 8px;
        }

        .section-header p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            max-width: 680px;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-question {
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-main);
            letter-spacing: 0.3px;
            transition: background var(--transition);
            border: none;
            background: none;
            width: 100%;
            text-align: left;
            font-family: inherit;
        }

        .faq-question:hover {
            background: var(--primary-light);
        }

        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-light);
            border-radius: 50%;
            color: var(--primary);
            font-size: 1rem;
            font-weight: 700;
            transition: transform var(--transition);
        }

        .faq-card.open .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }

        .faq-answer {
            display: none;
            padding: 0 24px 20px;
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.85;
            border-top: 1px solid var(--border);
            padding-top: 16px;
        }

        .faq-card.open .faq-answer {
            display: block;
        }

        .faq-card.open .faq-question {
            background: var(--primary-light);
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            padding: 48px 0 64px;
        }

        .cta-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 48px 42px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-card::before {
            content: '';
            position: absolute;
            top: -80px;
            left: 50%;
            transform: translateX(-50%);
            width: 320px;
            height: 320px;
            background: radial-gradient(circle, rgba(31, 111, 235, 0.06), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-card h2 {
            font-size: 1.7rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 14px;
            letter-spacing: 0.4px;
            position: relative;
            z-index: 1;
        }

        .cta-card p {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto 28px;
            line-height: 1.8;
            position: relative;
            z-index: 1;
        }

        .cta-btns {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            text-decoration: none;
            transition: all var(--transition);
            border: 2px solid transparent;
            letter-spacing: 0.3px;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            text-decoration: none;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(31, 111, 235, 0.3);
        }

        .btn-secondary {
            background: #fff;
            color: var(--primary);
            border-color: var(--primary);
        }

        .btn-secondary:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
            text-decoration: none;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(31, 111, 235, 0.15);
        }

        .btn-accent {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
        }

        .btn-accent:hover {
            background: var(--accent-hover);
            border-color: var(--accent-hover);
            color: #fff;
            text-decoration: none;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(217, 142, 4, 0.3);
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--card-bg);
            border-top: 1px solid var(--border);
            padding: 48px 0 28px;
            margin-top: 16px;
        }

        .footer-container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 28px;
        }

        .footer-top {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.4fr;
            gap: 32px;
            padding-bottom: 32px;
            border-bottom: 1px solid var(--border);
        }

        .footer-col h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        .footer-col p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 6px;
        }

        .footer-col a {
            display: block;
            font-size: 0.9rem;
            color: var(--text-secondary);
            text-decoration: none;
            padding: 5px 0;
            transition: all var(--transition);
        }

        .footer-col a:hover {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .footer-bottom {
            padding-top: 20px;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 6px;
        }

        .footer-bottom a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: color var(--transition);
        }

        .footer-bottom a:hover {
            color: var(--primary);
            text-decoration: underline;
        }

        .footer-sep {
            margin: 0 8px;
            color: var(--border);
        }

        /* ========== BOTTOM FIXED BAR ========== */
        .bottom-fixed-bar {
            position: fixed;
            bottom: 20px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 90;
            background: rgba(255, 255, 255, 0.96);
            border: 1px solid var(--border);
            border-radius: 16px;
            box-shadow: 0 10px 32px rgba(15, 30, 61, 0.16);
            padding: 12px 22px;
            display: flex;
            align-items: center;
            gap: 20px;
            transition: opacity 0.35s ease, transform 0.35s ease;
            max-width: 94vw;
        }

        .bottom-fixed-bar.hidden {
            opacity: 0;
            pointer-events: none;
            transform: translateX(-50%) translateY(20px);
        }

        .bottom-fixed-bar .bar-text {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-main);
            white-space: nowrap;
        }

        .bottom-fixed-bar .bar-tel {
            font-size: 0.88rem;
            color: var(--text-secondary);
            white-space: nowrap;
        }

        .bottom-fixed-bar .btn {
            padding: 10px 18px;
            font-size: 0.85rem;
            white-space: nowrap;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .page-hero-img {
                flex: 0 0 280px;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-top {
                grid-template-columns: 1fr 1fr;
            }

            .filter-sidebar {
                flex: 0 0 240px;
            }

            .article-item-img {
                flex: 0 0 160px;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 18px;
            }

            .nav-links {
                display: none;
            }

            .nav-hamburger {
                display: block;
            }

            .nav-cta-btn {
                display: none;
            }

            .page-hero-card {
                padding: 28px 24px;
                flex-direction: column;
                align-items: flex-start;
            }

            .page-hero-img {
                flex: 0 0 auto;
                width: 100%;
                max-width: 420px;
            }

            .page-hero-text h1 {
                font-size: 1.6rem;
            }

            .main-layout {
                flex-direction: column;
            }

            .filter-sidebar {
                flex: 0 0 auto;
                position: static;
                width: 100%;
            }

            .article-item-card {
                flex-direction: column;
            }

            .article-item-img {
                flex: 0 0 auto;
                width: 100%;
                max-height: 200px;
            }

            .stats-grid {
                gap: 14px;
            }

            .stat-number {
                font-size: 1.7rem;
            }

            .footer-top {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .cta-card {
                padding: 32px 22px;
            }

            .cta-card h2 {
                font-size: 1.4rem;
            }

            .bottom-fixed-bar {
                padding: 10px 16px;
                gap: 12px;
                flex-wrap: nowrap;
                overflow-x: auto;
                bottom: 10px;
            }

            .bottom-fixed-bar .bar-text {
                font-size: 0.8rem;
            }

            .bottom-fixed-bar .btn {
                padding: 8px 14px;
                font-size: 0.78rem;
            }

            .deep-content-card {
                padding: 24px 20px;
            }
        }

        @media (max-width: 520px) {
            .page-hero-card {
                padding: 22px 16px;
                gap: 20px;
            }

            .page-hero-text h1 {
                font-size: 1.35rem;
            }

            .page-hero-text .hero-desc {
                font-size: 0.92rem;
            }

            .badge-item {
                font-size: 0.75rem;
                padding: 6px 12px;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }

            .stat-card {
                padding: 18px 14px;
            }

            .stat-number {
                font-size: 1.4rem;
            }

            .stat-label {
                font-size: 0.78rem;
            }

            .faq-question {
                padding: 14px 16px;
                font-size: 0.9rem;
            }

            .faq-answer {
                padding: 0 16px 16px;
                font-size: 0.85rem;
            }

            .cta-btns {
                flex-direction: column;
                width: 100%;
            }

            .cta-btns .btn {
                width: 100%;
            }

            .article-item-title {
                font-size: 1rem;
            }

            .article-item-excerpt {
                font-size: 0.85rem;
            }

            .article-item-card {
                padding: 16px;
                gap: 14px;
            }

            .bottom-fixed-bar {
                flex-direction: row;
                justify-content: space-between;
                gap: 8px;
                padding: 8px 12px;
            }

            .bottom-fixed-bar .bar-tel {
                display: none;
            }

            .breadcrumb {
                font-size: 0.75rem;
            }

            .filter-card {
                padding: 18px 16px;
            }
        }

/* roulang page: category3 */
:root {
  --primary: #1F6FEB;
  --primary-dark: #1B5FD0;
  --primary-light: #EEF4FF;
  --accent: #D98E04;
  --accent-hover: #C07D03;
  --bg: #F6F8FC;
  --card-bg: #FFFFFF;
  --border: #E6EDF6;
  --text-main: #1A2233;
  --text-secondary: #54647A;
  --text-muted: #7A879B;
  --danger: #D33A3A;
  --radius-card: 16px;
  --radius-img: 12px;
  --radius-btn: 10px;
  --radius-pill: 24px;
  --shadow-card: 0 4px 20px rgba(20, 40, 80, 0.06);
  --shadow-card-hover: 0 8px 28px rgba(20, 40, 80, 0.10);
  --shadow-nav: 0 2px 16px rgba(20, 40, 80, 0.05);
  --transition: 0.2s ease;
  --container: 1200px;
  --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-main);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-img);
}
a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition);
}
a:hover {
  color: var(--primary-dark);
}
button,
input,
select,
textarea {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}
button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 3px solid rgba(31, 111, 235, 0.35);
  outline-offset: 2px;
  border-radius: 4px;
}
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
}

/* ========== HEADER / NAV ========== */
.site-header {
  padding-top: 18px;
  position: relative;
  z-index: 100;
}
.nav-panel {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-nav);
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: nowrap;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  text-decoration: none;
}
.nav-logo-icon {
  width: 42px;
  height: 42px;
  background: var(--primary);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0.5px;
  flex-shrink: 0;
}
.nav-logo-text {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.2;
  letter-spacing: 0.5px;
}
.nav-logo-text span {
  color: var(--primary);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  flex-shrink: 1;
  min-width: 0;
  padding: 2px 4px;
}
.nav-links::-webkit-scrollbar {
  display: none;
}
.nav-link-card {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  white-space: nowrap;
  transition: all var(--transition);
  flex-shrink: 0;
}
.nav-link-card:hover {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
  text-decoration: none;
}
.nav-link-card.active {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
  font-weight: 600;
}
.nav-link-icon {
  font-size: 0.9rem;
  opacity: 0.8;
}
.nav-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  background: var(--primary);
  color: #fff;
  border-radius: var(--radius-btn);
  font-weight: 600;
  font-size: 0.9rem;
  border: none;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
  transition: all var(--transition);
}
.nav-cta-btn:hover {
  background: var(--primary-dark);
  color: #fff;
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(31, 111, 235, 0.25);
}
.nav-hamburger {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-main);
  padding: 8px;
  border-radius: 8px;
}
.mobile-nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15, 30, 61, 0.45);
  z-index: 99;
}
.mobile-nav-overlay.show {
  display: block;
}

/* ========== BREADCRUMB ========== */
.breadcrumb-wrap {
  padding: 22px 0 0;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
}
.breadcrumb a:hover {
  color: var(--primary);
  text-decoration: underline;
}
.breadcrumb .sep {
  color: var(--border);
  font-size: 0.75rem;
}
.breadcrumb .current {
  color: var(--text-secondary);
  font-weight: 500;
}

/* ========== PAGE HERO ========== */
.page-hero {
  padding: 38px 0 28px;
}
.page-hero-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 36px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.page-hero-content {
  flex: 1;
  min-width: 0;
}
.page-hero-content h1 {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text-main);
  margin-bottom: 12px;
}
.page-hero-content p {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 680px;
}
.page-hero-img {
  flex-shrink: 0;
  width: 220px;
  height: 150px;
  object-fit: cover;
  border-radius: var(--radius-img);
  background: var(--primary-light);
}
.page-hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary-light);
  color: var(--primary);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 14px;
}

/* ========== MAIN LAYOUT ========== */
.main-layout {
  padding: 24px 0 60px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 28px;
  align-items: start;
}
.article-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 36px 38px;
}
.article-card h2 {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 16px;
  line-height: 1.5;
  position: relative;
  padding-left: 16px;
}
.article-card h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 4px;
  background: var(--primary);
  border-radius: 2px;
}
.article-card h3 {
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 24px 0 10px;
  line-height: 1.5;
}
.article-card p {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 14px;
  text-align: justify;
}
.article-card ul {
  padding-left: 20px;
  margin-bottom: 14px;
}
.article-card li {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 6px;
}
.article-card img {
  margin: 20px 0;
  width: 100%;
  height: auto;
}
.article-card strong {
  color: var(--text-main);
}
.article-card .highlight-box {
  background: var(--primary-light);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 20px;
  margin: 16px 0;
  font-size: 0.93rem;
  color: var(--text-secondary);
  line-height: 1.8;
}
.article-card .accent-badge {
  display: inline-block;
  background: #FEF6E8;
  color: var(--accent-hover);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  font-weight: 600;
  border: 1px solid #F5E0BE;
}

/* ========== SIDEBAR ========== */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: sticky;
  top: 120px;
}
.sidebar-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 24px 22px;
}
.sidebar-card h4 {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.sidebar-card h4 .icon {
  font-size: 1rem;
}
.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.toc-list li {
  margin-bottom: 8px;
}
.toc-list a {
  display: block;
  padding: 8px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition);
}
.toc-list a:hover {
  background: var(--primary-light);
  color: var(--primary);
  border-color: var(--primary);
  text-decoration: none;
}
.toc-list a .num {
  display: inline-block;
  width: 22px;
  height: 22px;
  background: var(--primary);
  color: #fff;
  border-radius: 6px;
  text-align: center;
  line-height: 22px;
  font-size: 0.75rem;
  font-weight: 600;
  margin-right: 8px;
}
.data-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.data-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 12px;
  text-align: center;
}
.data-item .num {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
}
.data-item .label {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 4px;
}
.sidebar-cta {
  background: var(--primary);
  border: none;
  color: #fff;
  border-radius: var(--radius-card);
  padding: 24px 22px;
  box-shadow: var(--shadow-card);
}
.sidebar-cta h4 {
  color: #fff;
  font-size: 1rem;
  margin-bottom: 10px;
}
.sidebar-cta p {
  color: rgba(255, 255, 255, 0.88);
  font-size: 0.85rem;
  line-height: 1.7;
  margin-bottom: 14px;
}
.sidebar-cta a {
  display: inline-block;
  background: #fff;
  color: var(--primary);
  padding: 10px 18px;
  border-radius: var(--radius-btn);
  font-weight: 600;
  font-size: 0.85rem;
  text-decoration: none;
  transition: all var(--transition);
}
.sidebar-cta a:hover {
  background: var(--primary-light);
  color: var(--primary-dark);
  text-decoration: none;
  transform: translateY(-1px);
}

/* ========== SERVICE FLOW ========== */
.service-flow {
  padding: 40px 0;
}
.flow-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 36px 38px;
}
.flow-card h2 {
  font-size: 1.45rem;
  font-weight: 700;
  margin-bottom: 24px;
  text-align: center;
}
.flow-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.flow-step {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 16px;
  text-align: center;
  transition: all var(--transition);
  position: relative;
}
.flow-step:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
  border-color: var(--primary-light);
}
.flow-step .step-num {
  width: 36px;
  height: 36px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.95rem;
  margin: 0 auto 12px;
}
.flow-step h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
}
.flow-step p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ========== FAQ ========== */
.faq-section {
  padding: 40px 0;
}
.faq-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 36px 38px;
}
.faq-card h2 {
  font-size: 1.45rem;
  font-weight: 700;
  margin-bottom: 24px;
  text-align: center;
}
.faq-item {
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 12px;
  overflow: hidden;
  background: var(--bg);
  transition: all var(--transition);
}
.faq-item:last-child {
  margin-bottom: 0;
}
.faq-item.active {
  background: var(--primary-light);
  border-color: var(--primary-light);
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 20px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  text-align: left;
  transition: all var(--transition);
}
.faq-question:hover {
  color: var(--primary);
}
.faq-question .faq-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: all var(--transition);
}
.faq-item.active .faq-icon {
  transform: rotate(45deg);
  background: var(--accent);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 20px;
}
.faq-answer p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.8;
  padding-bottom: 16px;
}

/* ========== CTA ========== */
.cta-section {
  padding: 48px 0 20px;
}
.cta-card {
  background: var(--primary);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card-hover);
  padding: 44px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.cta-card h2 {
  color: #fff;
  font-size: 1.45rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.cta-card p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.93rem;
  line-height: 1.7;
  max-width: 560px;
}
.cta-card-btns {
  display: flex;
  gap: 12px;
  flex-shrink: 0;
  flex-wrap: wrap;
}
.cta-btn-white {
  background: #fff;
  color: var(--primary);
  padding: 12px 24px;
  border-radius: var(--radius-btn);
  font-weight: 600;
  font-size: 0.9rem;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition);
}
.cta-btn-white:hover {
  background: var(--primary-light);
  color: var(--primary-dark);
  text-decoration: none;
  transform: translateY(-2px);
}
.cta-btn-outline {
  background: transparent;
  color: #fff;
  padding: 12px 24px;
  border-radius: var(--radius-btn);
  font-weight: 600;
  font-size: 0.9rem;
  border: 1px solid rgba(255, 255, 255, 0.6);
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition);
}
.cta-btn-outline:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  text-decoration: none;
  transform: translateY(-2px);
  border-color: #fff;
}

/* ========== FOOTER ========== */
.site-footer {
  margin-top: 40px;
  background: #0F1E3D;
  color: #C7D0DF;
  border-radius: var(--radius-card) var(--radius-card) 0 0;
}
.footer-container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 48px 28px 28px;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 0.8fr 1fr;
  gap: 32px;
  margin-bottom: 36px;
}
.footer-col h4 {
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 16px;
}
.footer-col p {
  font-size: 0.85rem;
  color: #9DA9BE;
  line-height: 1.7;
  margin-bottom: 6px;
}
.footer-col a {
  display: block;
  color: #C7D0DF;
  font-size: 0.85rem;
  text-decoration: none;
  margin-bottom: 10px;
  transition: color var(--transition);
}
.footer-col a:hover {
  color: #fff;
  text-decoration: underline;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 20px;
  text-align: center;
}
.footer-bottom p {
  font-size: 0.8rem;
  color: #8A96AC;
  line-height: 1.8;
  margin-bottom: 4px;
}
.footer-bottom a {
  color: #C7D0DF;
  text-decoration: none;
  transition: color var(--transition);
}
.footer-bottom a:hover {
  color: #fff;
  text-decoration: underline;
}
.footer-sep {
  margin: 0 6px;
  color: rgba(255, 255, 255, 0.25);
}

/* ========== MOBILE NAV DRAWER ========== */
@media (max-width: 1024px) {
  .nav-links {
    display: none;
  }
  .nav-hamburger {
    display: block;
  }
  .nav-panel {
    flex-wrap: wrap;
    gap: 10px;
  }
  .nav-cta-btn {
    margin-left: auto;
  }
  .nav-links.show-mobile {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    padding: 12px 0 4px;
    border-top: 1px solid var(--border);
  }
  .nav-links.show-mobile .nav-link-card {
    justify-content: flex-start;
    width: 100%;
  }
}
@media (max-width: 900px) {
  .main-layout {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .sidebar {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
  }
  .sidebar-card {
    flex: 1;
    min-width: 240px;
  }
  .sidebar-cta {
    flex: 1;
    min-width: 240px;
  }
  .flow-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 640px) {
  .container {
    padding: 0 16px;
  }
  .page-hero-card {
    flex-direction: column;
    align-items: flex-start;
    padding: 26px 22px;
  }
  .page-hero-content h1 {
    font-size: 1.5rem;
  }
  .page-hero-img {
    width: 100%;
    height: auto;
    aspect-ratio: 16/9;
  }
  .article-card {
    padding: 24px 20px;
  }
  .article-card h2 {
    font-size: 1.2rem;
  }
  .flow-card {
    padding: 24px 20px;
  }
  .flow-grid {
    grid-template-columns: 1fr;
  }
  .faq-card {
    padding: 24px 20px;
  }
  .cta-card {
    padding: 30px 24px;
    flex-direction: column;
    align-items: flex-start;
  }
  .cta-card-btns {
    width: 100%;
    flex-direction: column;
  }
  .footer-container {
    padding: 36px 20px 20px;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .sidebar {
    flex-direction: column;
  }
  .nav-cta-btn {
    padding: 8px 14px;
    font-size: 0.8rem;
  }
}

/* ========== BOTTOM FIXED BAR ========== */
.bottom-fixed-bar {
  position: fixed;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 90;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 8px 28px rgba(20, 40, 80, 0.14);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  max-width: 92vw;
  transition: opacity 0.3s ease, transform 0.3s ease;
}
.bottom-fixed-bar.hide {
  opacity: 0;
  pointer-events: none;
  transform: translateX(-50%) translateY(20px);
}
.bottom-fixed-bar .bfb-text {
  font-size: 0.82rem;
  color: var(--text-secondary);
  white-space: nowrap;
}
.bottom-fixed-bar .bfb-text strong {
  color: var(--text-main);
}
.bottom-fixed-bar a {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 8px 16px;
  border-radius: var(--radius-btn);
  font-weight: 600;
  font-size: 0.82rem;
  text-decoration: none;
  white-space: nowrap;
  transition: all var(--transition);
}
.bfb-primary {
  background: var(--primary);
  color: #fff;
}
.bfb-primary:hover {
  background: var(--primary-dark);
  color: #fff;
  text-decoration: none;
  transform: translateY(-1px);
}
.bfb-secondary {
  background: var(--primary-light);
  color: var(--primary);
  border: 1px solid var(--primary-light);
}
.bfb-secondary:hover {
  background: #dfe9ff;
  color: var(--primary-dark);
  text-decoration: none;
}
.bfb-phone {
  background: none;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.bfb-phone:hover {
  background: var(--bg);
  color: var(--primary);
  text-decoration: none;
}

/* roulang page: category5 */
:root {
            --primary: #1F6FEB;
            --primary-dark: #1B5FD0;
            --primary-light: #EEF4FF;
            --accent: #D98E04;
            --accent-hover: #C07D03;
            --bg: #F6F8FC;
            --card-bg: #FFFFFF;
            --border: #E6EDF6;
            --text-main: #1A2233;
            --text-secondary: #54647A;
            --text-muted: #7A879B;
            --danger: #D33A3A;
            --radius-card: 16px;
            --radius-img: 12px;
            --radius-btn: 10px;
            --radius-pill: 24px;
            --shadow-card: 0 4px 20px rgba(20, 40, 80, 0.06);
            --shadow-card-hover: 0 8px 28px rgba(20, 40, 80, 0.10);
            --shadow-nav: 0 2px 16px rgba(20, 40, 80, 0.05);
            --transition: 0.2s ease;
            --container: 1200px;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-main);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-img);
        }

        a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
            transition: color var(--transition);
        }

        a:hover {
            color: var(--primary-dark);
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible {
            outline: 3px solid rgba(31, 111, 235, 0.35);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 28px;
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            padding-top: 18px;
            position: relative;
            z-index: 100;
        }

        .nav-panel {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-nav);
            padding: 14px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: nowrap;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .nav-logo-icon {
            width: 42px;
            height: 42px;
            background: var(--primary);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 20px;
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }

        .nav-logo-text {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.2;
            letter-spacing: 0.5px;
            text-decoration: none;
        }

        .nav-logo-text span {
            color: var(--primary);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
            flex-shrink: 1;
            min-width: 0;
            padding: 2px 4px;
        }

        .nav-links::-webkit-scrollbar {
            display: none;
        }

        .nav-link-card {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 14px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 10px;
            font-size: 0.86rem;
            font-weight: 500;
            color: var(--text-secondary);
            text-decoration: none;
            white-space: nowrap;
            transition: all var(--transition);
            flex-shrink: 0;
        }

        .nav-link-card:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary);
            text-decoration: none;
        }

        .nav-link-card.active {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary);
            font-weight: 600;
        }

        .nav-link-icon {
            font-size: 0.9rem;
            opacity: 0.8;
        }

        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.9rem;
            border: none;
            cursor: pointer;
            text-decoration: none;
            white-space: nowrap;
            flex-shrink: 0;
            transition: all var(--transition);
        }

        .nav-cta-btn:hover {
            background: var(--primary-dark);
            color: #fff;
            text-decoration: none;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(31, 111, 235, 0.25);
        }

        .nav-hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--text-main);
            padding: 8px;
            border-radius: 8px;
        }

        .mobile-nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(15, 30, 60, 0.5);
            z-index: 99;
        }

        .mobile-nav-drawer {
            display: none;
            position: fixed;
            top: 0;
            right: 0;
            bottom: 0;
            width: 320px;
            max-width: 85vw;
            background: var(--card-bg);
            z-index: 100;
            padding: 20px;
            box-shadow: -8px 0 30px rgba(20, 40, 80, 0.15);
            overflow-y: auto;
            flex-direction: column;
            gap: 12px;
        }

        .mobile-nav-drawer.open {
            display: flex;
        }

        .mobile-nav-overlay.open {
            display: block;
        }

        .mobile-nav-drawer .nav-close-btn {
            align-self: flex-end;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--text-main);
            padding: 4px 8px;
            border-radius: 8px;
        }

        .mobile-nav-drawer .nav-link-card {
            width: 100%;
            justify-content: flex-start;
            font-size: 1rem;
            padding: 12px 16px;
        }

        /* ========== BREADCRUMB ========== */
        .breadcrumb-bar {
            padding: 20px 0 0;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            color: var(--text-muted);
            flex-wrap: wrap;
            background: transparent;
            padding: 0;
            margin: 0;
        }

        .breadcrumb a {
            color: var(--text-secondary);
            text-decoration: none;
        }

        .breadcrumb a:hover {
            color: var(--primary);
        }

        .breadcrumb span {
            color: var(--text-muted);
        }

        .breadcrumb .current {
            color: var(--text-main);
            font-weight: 600;
        }

        /* ========== HERO ========== */
        .page-hero {
            padding: 32px 0 12px;
        }

        .page-hero-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 40px 44px;
            position: relative;
            overflow: hidden;
        }

        .page-hero-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: var(--radius-card) var(--radius-card) 0 0;
        }

        .page-hero-badge {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            padding: 4px 16px;
            border-radius: var(--radius-pill);
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
        }

        .page-hero h1 {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 12px;
            line-height: 1.3;
            letter-spacing: 0.5px;
        }

        .page-hero-sub {
            font-size: 1.05rem;
            color: var(--text-secondary);
            margin: 0 0 20px;
            max-width: 820px;
            line-height: 1.8;
        }

        .page-hero-meta {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            align-items: center;
        }

        .page-hero-meta-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: var(--text-secondary);
        }

        .page-hero-meta-item .meta-dot {
            width: 8px;
            height: 8px;
            background: var(--accent);
            border-radius: 50%;
            flex-shrink: 0;
        }

        /* ========== CASE SHOWCASE ========== */
        .case-showcase {
            padding: 44px 0;
        }

        .case-showcase-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }

        .case-card-large {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

        .case-card-large:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }

        .case-card-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
            border-radius: 0;
        }

        .case-card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform 0.4s ease;
        }

        .case-card-large:hover .case-card-img-wrap img {
            transform: scale(1.03);
        }

        .case-card-tag {
            position: absolute;
            top: 16px;
            left: 16px;
            background: rgba(255, 255, 255, 0.92);
            color: var(--primary);
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            backdrop-filter: blur(6px);
        }

        .case-card-body {
            padding: 24px 26px 26px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .case-card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 10px;
            line-height: 1.4;
        }

        .case-card-body p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            margin: 0 0 18px;
            line-height: 1.75;
            flex: 1;
        }

        .case-card-meta {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 0.82rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border);
            padding-top: 14px;
        }

        .case-card-meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        /* ========== CASE LIST ROW ========== */
        .case-list-row {
            padding: 32px 0;
        }

        .case-list-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
        }

        .case-card-mini {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

        .case-card-mini:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .case-card-mini .case-card-img-wrap {
            aspect-ratio: 16 / 9;
        }

        .case-card-mini .case-card-body {
            padding: 18px 20px 20px;
        }

        .case-card-mini h4 {
            font-size: 0.98rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 8px;
            line-height: 1.45;
        }

        .case-card-mini p {
            font-size: 0.84rem;
            color: var(--text-secondary);
            margin: 0 0 14px;
            line-height: 1.65;
            flex: 1;
        }

        .case-card-mini .case-link {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .case-card-mini .case-link:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }

        /* ========== TESTIMONIAL BAR ========== */
        .testimonial-section {
            padding: 44px 0;
        }

        .testimonial-bar {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 32px 36px;
            display: flex;
            gap: 28px;
            flex-wrap: wrap;
            align-items: flex-start;
            position: relative;
        }

        .testimonial-bar::before {
            content: '\201C';
            font-size: 4rem;
            color: var(--primary-light);
            position: absolute;
            top: 8px;
            left: 20px;
            font-family: Georgia, serif;
            line-height: 1;
        }

        .testimonial-content {
            flex: 1;
            min-width: 280px;
            padding-left: 42px;
            position: relative;
            z-index: 1;
        }

        .testimonial-content p {
            font-size: 1.05rem;
            color: var(--text-main);
            margin: 0 0 16px;
            line-height: 1.85;
            font-weight: 500;
        }

        .testimonial-author {
            font-size: 0.88rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .testimonial-author strong {
            color: var(--text-secondary);
            font-weight: 600;
        }

        .testimonial-stats {
            display: flex;
            gap: 36px;
            flex-wrap: wrap;
            flex-shrink: 0;
            min-width: 260px;
            justify-content: flex-end;
        }

        .testimonial-stat {
            text-align: center;
            padding: 8px 0;
        }

        .testimonial-stat .stat-num {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
        }

        .testimonial-stat .stat-label {
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ========== RELATED CASES ========== */
        .related-cases {
            padding: 44px 0;
        }

        .related-cases h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 20px;
            letter-spacing: 0.3px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
        }

        /* ========== SERVICE FEATURES ========== */
        .service-features {
            padding: 44px 0;
        }

        .service-features h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 24px;
            letter-spacing: 0.3px;
        }

        .feature-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
        }

        .feature-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 22px 20px;
            transition: all var(--transition);
        }

        .feature-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .feature-icon {
            width: 44px;
            height: 44px;
            background: var(--primary-light);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            margin-bottom: 14px;
        }

        .feature-card h4 {
            font-size: 0.98rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 8px;
            line-height: 1.4;
        }

        .feature-card p {
            font-size: 0.84rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.65;
        }

        /* ========== PROCESS ========== */
        .process-section {
            padding: 44px 0;
        }

        .process-section h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 24px;
            letter-spacing: 0.3px;
        }

        .process-timeline {
            display: flex;
            gap: 0;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: thin;
            padding: 8px 0 16px;
        }

        .process-step {
            flex: 0 0 220px;
            min-width: 200px;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 22px 20px;
            position: relative;
            margin-right: 16px;
            transition: all var(--transition);
        }

        .process-step:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .process-step-num {
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 12px;
            flex-shrink: 0;
        }

        .process-step h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 8px;
            line-height: 1.4;
        }

        .process-step p {
            font-size: 0.82rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.65;
        }

        /* ========== FAQ ========== */
        .faq-section {
            padding: 44px 0;
        }

        .faq-section h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 24px;
            letter-spacing: 0.3px;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item.active {
            border-color: var(--primary);
            background: var(--primary-light);
        }

        .faq-question {
            padding: 18px 22px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            user-select: none;
            transition: background var(--transition);
            border: none;
            background: none;
            width: 100%;
            text-align: left;
            font-size: 0.98rem;
            font-weight: 600;
            color: var(--text-main);
            font-family: var(--font-sans);
            line-height: 1.5;
        }

        .faq-question:hover {
            background: var(--primary-light);
        }

        .faq-question .faq-icon {
            font-size: 1.2rem;
            color: var(--primary);
            flex-shrink: 0;
            transition: transform var(--transition);
        }

        .faq-item.active .faq-question .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            padding: 0 22px;
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.75;
        }

        .faq-item.active .faq-answer {
            max-height: 400px;
            padding: 0 22px 18px;
        }

        .faq-answer p {
            margin: 0;
        }

        /* ========== CTA ========== */
        .cta-section {
            padding: 44px 0 60px;
        }

        .cta-card {
            background: var(--primary);
            border-radius: var(--radius-card);
            padding: 44px 48px;
            display: flex;
            align-items: center;
            gap: 32px;
            flex-wrap: wrap;
            justify-content: space-between;
            box-shadow: 0 8px 30px rgba(31, 111, 235, 0.25);
        }

        .cta-card-content {
            flex: 1;
            min-width: 280px;
        }

        .cta-card-content h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: #fff;
            margin: 0 0 12px;
            line-height: 1.35;
        }

        .cta-card-content p {
            font-size: 0.98rem;
            color: rgba(255, 255, 255, 0.88);
            margin: 0;
            line-height: 1.75;
            max-width: 640px;
        }

        .cta-card-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            flex-shrink: 0;
        }

        .btn-primary-white {
            padding: 13px 28px;
            background: #fff;
            color: var(--primary);
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all var(--transition);
        }

        .btn-primary-white:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
            text-decoration: none;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15);
        }

        .btn-outline-white {
            padding: 13px 28px;
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.7);
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all var(--transition);
        }

        .btn-outline-white:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
            text-decoration: none;
            transform: translateY(-2px);
        }

        /* ========== SECTION HEADING ========== */
        .section-heading {
            margin-bottom: 28px;
        }

        .section-heading h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 0 0 8px;
            letter-spacing: 0.3px;
        }

        .section-heading p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.7;
            max-width: 720px;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #152A4A;
            margin-top: 40px;
            border-radius: var(--radius-card) var(--radius-card) 0 0;
            color: rgba(255, 255, 255, 0.85);
        }

        .footer-container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 44px 28px 28px;
        }

        .footer-top {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-bottom: 28px;
        }

        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin: 0 0 14px;
            letter-spacing: 0.5px;
        }

        .footer-col p {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.72);
            margin: 0 0 8px;
            line-height: 1.7;
        }

        .footer-col a {
            display: block;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.72);
            text-decoration: none;
            padding: 4px 0;
            transition: color var(--transition);
        }

        .footer-col a:hover {
            color: #fff;
            text-decoration: underline;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.15);
            padding-top: 20px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.55);
        }

        .footer-bottom p {
            margin: 0;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.7);
            text-decoration: none;
            transition: color var(--transition);
        }

        .footer-bottom a:hover {
            color: #fff;
            text-decoration: underline;
        }

        .footer-sep {
            margin: 0 8px;
            opacity: 0.4;
        }

        /* ========== FIXED BOTTOM BAR ========== */
        .fixed-bottom-cta {
            position: fixed;
            bottom: 16px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 90;
            background: rgba(255, 255, 255, 0.95);
            border: 1px solid var(--border);
            border-radius: 14px;
            box-shadow: 0 8px 30px rgba(20, 40, 80, 0.15);
            padding: 10px 18px;
            display: flex;
            align-items: center;
            gap: 14px;
            backdrop-filter: blur(10px);
            transition: opacity 0.3s ease, transform 0.3s ease;
            max-width: 640px;
            width: auto;
        }

        .fixed-bottom-cta.hidden {
            opacity: 0;
            pointer-events: none;
            transform: translateX(-50%) translateY(16px);
        }

        .fixed-bottom-cta-text {
            font-size: 0.85rem;
            color: var(--text-secondary);
            font-weight: 500;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            max-width: 220px;
        }

        .fixed-bottom-cta .btn-mini-primary {
            padding: 9px 18px;
            background: var(--primary);
            color: #fff;
            border-radius: 8px;
            font-weight: 600;
            font-size: 0.82rem;
            border: none;
            cursor: pointer;
            text-decoration: none;
            white-space: nowrap;
            transition: all var(--transition);
        }

        .fixed-bottom-cta .btn-mini-primary:hover {
            background: var(--primary-dark);
            text-decoration: none;
        }

        .fixed-bottom-cta .btn-mini-outline {
            padding: 9px 18px;
            background: transparent;
            color: var(--primary);
            border: 1px solid var(--primary);
            border-radius: 8px;
            font-weight: 600;
            font-size: 0.82rem;
            cursor: pointer;
            text-decoration: none;
            white-space: nowrap;
            transition: all var(--transition);
        }

        .fixed-bottom-cta .btn-mini-outline:hover {
            background: var(--primary-light);
            text-decoration: none;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .case-list-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-top {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 900px) {
            .case-showcase-grid {
                grid-template-columns: 1fr;
            }
            .testimonial-bar {
                flex-direction: column;
                padding: 28px 24px;
            }
            .testimonial-stats {
                justify-content: flex-start;
                min-width: 100%;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
            .nav-panel {
                padding: 10px 14px;
            }
            .nav-links {
                display: none;
            }
            .nav-hamburger {
                display: block;
            }
            .nav-cta-btn {
                display: none;
            }
            .page-hero-card {
                padding: 28px 22px;
            }
            .page-hero h1 {
                font-size: 1.6rem;
            }
            .page-hero-sub {
                font-size: 0.95rem;
            }
            .case-card-body {
                padding: 18px 16px 20px;
            }
            .case-card-body h3 {
                font-size: 1.02rem;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .case-list-grid {
                grid-template-columns: 1fr;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .cta-card {
                padding: 28px 22px;
                flex-direction: column;
                text-align: center;
            }
            .cta-card-content h2 {
                font-size: 1.3rem;
            }
            .cta-card-actions {
                justify-content: center;
                width: 100%;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .testimonial-content {
                padding-left: 30px;
            }
            .testimonial-stats {
                gap: 20px;
                justify-content: flex-start;
            }
            .fixed-bottom-cta {
                bottom: 8px;
                padding: 8px 12px;
                gap: 8px;
                max-width: calc(100vw - 24px);
            }
            .fixed-bottom-cta-text {
                max-width: 120px;
                font-size: 0.78rem;
            }
            .fixed-bottom-cta .btn-mini-primary,
            .fixed-bottom-cta .btn-mini-outline {
                padding: 8px 12px;
                font-size: 0.75rem;
            }
            .process-step {
                flex: 0 0 180px;
                min-width: 160px;
                padding: 16px 14px;
            }
        }

        @media (max-width: 480px) {
            .page-hero h1 {
                font-size: 1.35rem;
            }
            .page-hero-card {
                padding: 22px 16px;
            }
            .section-heading h2 {
                font-size: 1.2rem;
            }
            .cta-card-content h2 {
                font-size: 1.2rem;
            }
            .fixed-bottom-cta-text {
                display: none;
            }
        }

/* roulang page: category4 */
:root {
            --primary: #1F6FEB;
            --primary-dark: #1B5FD0;
            --primary-light: #EEF4FF;
            --accent: #D98E04;
            --accent-hover: #C07D03;
            --bg: #F6F8FC;
            --card-bg: #FFFFFF;
            --border: #E6EDF6;
            --text-main: #1A2233;
            --text-secondary: #54647A;
            --text-muted: #7A879B;
            --danger: #D33A3A;
            --radius-card: 16px;
            --radius-img: 12px;
            --radius-btn: 10px;
            --radius-pill: 24px;
            --shadow-card: 0 4px 20px rgba(20, 40, 80, 0.06);
            --shadow-card-hover: 0 8px 28px rgba(20, 40, 80, 0.10);
            --shadow-nav: 0 2px 16px rgba(20, 40, 80, 0.05);
            --transition: 0.2s ease;
            --container: 1200px;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-main);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-img);
        }

        a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
            transition: color var(--transition);
        }

        a:hover {
            color: var(--primary-dark);
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible {
            outline: 3px solid rgba(31, 111, 235, 0.35);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 28px;
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            padding-top: 18px;
            position: relative;
            z-index: 100;
        }

        .nav-panel {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-nav);
            padding: 14px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: nowrap;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            text-decoration: none;
        }

        .nav-logo:hover {
            text-decoration: none;
        }

        .nav-logo-icon {
            width: 42px;
            height: 42px;
            background: var(--primary);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 20px;
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }

        .nav-logo-text {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.2;
            letter-spacing: 0.5px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
            flex-shrink: 1;
            min-width: 0;
            padding: 2px 4px;
        }

        .nav-links::-webkit-scrollbar {
            display: none;
        }

        .nav-link-card {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 14px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 10px;
            font-size: 0.86rem;
            font-weight: 500;
            color: var(--text-secondary);
            text-decoration: none;
            white-space: nowrap;
            transition: all var(--transition);
            flex-shrink: 0;
        }

        .nav-link-card:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary);
            text-decoration: none;
        }

        .nav-link-card.active {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary);
            font-weight: 600;
        }

        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.9rem;
            border: none;
            cursor: pointer;
            text-decoration: none;
            white-space: nowrap;
            flex-shrink: 0;
            transition: all var(--transition);
        }

        .nav-cta-btn:hover {
            background: var(--primary-dark);
            color: #fff;
            text-decoration: none;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(31, 111, 235, 0.25);
        }

        .nav-hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--text-main);
            padding: 8px;
            border-radius: 8px;
        }

        /* ========== BREADCRUMB ========== */
        .breadcrumb-nav {
            padding: 24px 0 0;
        }

        .breadcrumb-list {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .breadcrumb-list li {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            color: var(--text-muted);
        }

        .breadcrumb-list li a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: color var(--transition);
        }

        .breadcrumb-list li a:hover {
            color: var(--primary);
            text-decoration: underline;
        }

        .breadcrumb-list li:not(:last-child)::after {
            content: '/';
            color: var(--text-muted);
            margin-left: 4px;
        }

        /* ========== HERO ========== */
        .page-hero {
            padding: 32px 0 24px;
        }

        .hero-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 40px 40px;
            display: flex;
            align-items: center;
            gap: 40px;
            position: relative;
            overflow: hidden;
        }

        .hero-card::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 300px;
            height: 100%;
            background: linear-gradient(135deg, transparent 60%, rgba(31, 111, 235, 0.04));
            pointer-events: none;
        }

        .hero-content {
            flex: 1;
            min-width: 0;
            position: relative;
            z-index: 1;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 0.82rem;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            margin-bottom: 16px;
            border: 1px solid rgba(31, 111, 235, 0.2);
        }

        .hero-content h1 {
            font-size: 2.2rem;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-main);
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }

        .hero-content h1 .highlight {
            color: var(--primary);
        }

        .hero-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 24px;
            max-width: 640px;
        }

        .hero-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            text-decoration: none;
            white-space: nowrap;
            transition: all var(--transition);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            text-decoration: none;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(31, 111, 235, 0.25);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: #fff;
            color: var(--text-main);
            border: 1px solid var(--border);
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            text-decoration: none;
            white-space: nowrap;
            transition: all var(--transition);
        }

        .btn-secondary:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary);
            text-decoration: none;
            transform: translateY(-1px);
        }

        .hero-visual {
            flex-shrink: 0;
            width: 380px;
            position: relative;
            z-index: 1;
        }

        .hero-visual img {
            width: 100%;
            height: 260px;
            object-fit: cover;
            border-radius: var(--radius-img);
            box-shadow: var(--shadow-card-hover);
        }

        .hero-stat-card {
            position: absolute;
            bottom: -18px;
            right: 16px;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 14px 18px;
            box-shadow: var(--shadow-card-hover);
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .hero-stat-card .stat-number {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1;
        }

        .hero-stat-card .stat-label {
            font-size: 0.78rem;
            color: var(--text-muted);
            line-height: 1.3;
        }

        /* ========== SECTION COMMON ========== */
        .section {
            padding: 48px 0;
        }

        .section-header {
            margin-bottom: 32px;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 0.82rem;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            margin-bottom: 12px;
            border: 1px solid rgba(31, 111, 235, 0.2);
        }

        .section-header h2 {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 10px;
            letter-spacing: 0.3px;
        }

        .section-header p {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.8;
        }

        /* ========== STEPS FLOW ========== */
        .steps-flow {
            display: flex;
            flex-direction: column;
            gap: 0;
        }

        .step-card {
            display: flex;
            gap: 24px;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 28px 32px;
            margin-bottom: 20px;
            transition: all var(--transition);
            position: relative;
        }

        .step-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: rgba(31, 111, 235, 0.3);
        }

        .step-number {
            width: 56px;
            height: 56px;
            flex-shrink: 0;
            background: var(--primary);
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 1.3rem;
            letter-spacing: 0.5px;
        }

        .step-card:nth-child(2) .step-number {
            background: var(--accent);
        }

        .step-card:nth-child(3) .step-number {
            background: #2E8B57;
        }

        .step-card:nth-child(4) .step-number {
            background: #6A5ACD;
        }

        .step-card:nth-child(5) .step-number {
            background: #C0392B;
        }

        .step-card:nth-child(6) .step-number {
            background: #00838F;
        }

        .step-content {
            flex: 1;
            min-width: 0;
        }

        .step-content h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
            letter-spacing: 0.3px;
        }

        .step-content p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 10px;
        }

        .step-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .step-tag {
            display: inline-block;
            font-size: 0.78rem;
            color: var(--text-secondary);
            background: var(--bg);
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            border: 1px solid var(--border);
        }

        .step-arrow {
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            font-size: 1.2rem;
            margin: -8px 0;
        }

        /* ========== COST INFO CARD ========== */
        .cost-card {
            background: linear-gradient(135deg, #0F1E3D 0%, #152A4A 50%, #1F3A6E 100%);
            border-radius: var(--radius-card);
            padding: 36px 40px;
            display: flex;
            align-items: center;
            gap: 32px;
            margin: 32px 0;
            color: #fff;
            position: relative;
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        .cost-card::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 240px;
            height: 240px;
            background: radial-gradient(circle, rgba(217, 142, 4, 0.25), transparent);
            border-radius: 50%;
            pointer-events: none;
        }

        .cost-info {
            flex: 1;
            min-width: 0;
            position: relative;
            z-index: 1;
        }

        .cost-info h3 {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: 0.3px;
        }

        .cost-info p {
            font-size: 0.92rem;
            color: rgba(255, 255, 255, 0.78);
            line-height: 1.8;
            margin-bottom: 14px;
        }

        .cost-list {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .cost-list li {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.88);
        }

        .cost-list li::before {
            content: '◆';
            color: var(--accent);
            font-size: 0.6rem;
        }

        /* ========== EXECUTION GRID ========== */
        .execution-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
            gap: 24px;
        }

        .execution-feature-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 28px;
            transition: all var(--transition);
        }

        .execution-feature-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
            border-color: rgba(31, 111, 235, 0.3);
        }

        .execution-feature-card .card-icon {
            width: 48px;
            height: 48px;
            background: var(--primary-light);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 16px;
            border: 1px solid rgba(31, 111, 235, 0.15);
        }

        .execution-feature-card .card-icon.accent {
            background: rgba(217, 142, 4, 0.1);
            border-color: rgba(217, 142, 4, 0.25);
        }

        .execution-feature-card h3 {
            font-size: 1.08rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
        }

        .execution-feature-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        /* ========== DEEP TEXT ========== */
        .deep-text-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 36px 40px;
        }

        .deep-text-card h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 20px;
            letter-spacing: 0.3px;
        }

        .deep-text-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-main);
            margin: 24px 0 10px;
        }

        .deep-text-card p {
            font-size: 0.98rem;
            color: var(--text-secondary);
            line-height: 1.9;
            margin-bottom: 16px;
        }

        .deep-text-card ul {
            list-style: none;
            padding: 0;
            margin: 0 0 16px;
        }

        .deep-text-card ul li {
            position: relative;
            padding-left: 24px;
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 8px;
        }

        .deep-text-card ul li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--primary);
            font-weight: 700;
        }

        /* ========== FAQ ========== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 14px;
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(31, 111, 235, 0.3);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 24px;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.98rem;
            color: var(--text-main);
            border: none;
            background: none;
            width: 100%;
            text-align: left;
            transition: color var(--transition);
        }

        .faq-question:hover {
            color: var(--primary);
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            background: var(--primary-light);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-weight: 700;
            font-size: 1.1rem;
            transition: transform var(--transition);
        }

        .faq-item.active .faq-question .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.85;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            padding: 48px 0 64px;
        }

        .cta-card {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            border-radius: var(--radius-card);
            padding: 48px 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            position: relative;
            overflow: hidden;
            box-shadow: 0 8px 28px rgba(31, 111, 235, 0.3);
        }

        .cta-card::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(217, 142, 4, 0.3), transparent);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-content {
            position: relative;
            z-index: 1;
            flex: 1;
            min-width: 0;
        }

        .cta-content h2 {
            font-size: 1.7rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
            letter-spacing: 0.3px;
        }

        .cta-content p {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.8;
        }

        .cta-actions {
            display: flex;
            gap: 14px;
            flex-shrink: 0;
            position: relative;
            z-index: 1;
            flex-wrap: wrap;
        }

        .btn-white {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            background: #fff;
            color: var(--primary);
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            text-decoration: none;
            white-space: nowrap;
            transition: all var(--transition);
        }

        .btn-white:hover {
            background: var(--primary-light);
            text-decoration: none;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15);
        }

        .btn-outline-white {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.7);
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            text-decoration: none;
            white-space: nowrap;
            transition: all var(--transition);
        }

        .btn-outline-white:hover {
            background: rgba(255, 255, 255, 0.15);
            text-decoration: none;
            transform: translateY(-1px);
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #0F1E3D;
            color: rgba(255, 255, 255, 0.8);
            margin-top: 40px;
            border-radius: 20px 20px 0 0;
        }

        .footer-container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 48px 28px 24px;
        }

        .footer-top {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-col h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

        .footer-col p {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.8;
        }

        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.65);
            text-decoration: none;
            font-size: 0.88rem;
            margin-bottom: 8px;
            transition: color var(--transition);
        }

        .footer-col a:hover {
            color: #fff;
            text-decoration: underline;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 20px;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.5);
            margin-bottom: 8px;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.65);
            text-decoration: none;
            font-size: 0.82rem;
        }

        .footer-bottom a:hover {
            color: #fff;
            text-decoration: underline;
        }

        .footer-sep {
            margin: 0 8px;
            color: rgba(255, 255, 255, 0.3);
        }

        /* ========== STICKY BOTTOM BAR ========== */
        .sticky-bottom-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 99;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-top: 1px solid var(--border);
            box-shadow: 0 -4px 20px rgba(20, 40, 80, 0.08);
            padding: 10px 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            transition: transform 0.3s ease;
        }

        .sticky-bottom-bar.hidden {
            transform: translateY(100%);
        }

        .sticky-bar-inner {
            display: flex;
            align-items: center;
            gap: 14px;
            max-width: 720px;
            width: 100%;
            flex-wrap: nowrap;
        }

        .sticky-bar-text {
            flex: 1;
            min-width: 0;
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.4;
        }

        .sticky-bar-text strong {
            color: var(--text-main);
            font-weight: 700;
        }

        .sticky-bar-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.82rem;
            border: none;
            cursor: pointer;
            text-decoration: none;
            white-space: nowrap;
            transition: all var(--transition);
        }

        .sticky-bar-btn:hover {
            background: var(--primary-dark);
            color: #fff;
            text-decoration: none;
            transform: translateY(-1px);
        }

        .sticky-bar-phone {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            background: var(--accent);
            color: #fff;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.82rem;
            text-decoration: none;
            white-space: nowrap;
            transition: all var(--transition);
        }

        .sticky-bar-phone:hover {
            background: var(--accent-hover);
            color: #fff;
            text-decoration: none;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .hero-card {
                flex-direction: column;
                align-items: flex-start;
                gap: 28px;
                padding: 28px;
            }

            .hero-visual {
                width: 100%;
                max-width: 480px;
            }

            .hero-content h1 {
                font-size: 1.8rem;
            }

            .cost-card {
                flex-direction: column;
                align-items: flex-start;
                padding: 28px;
            }

            .cta-card {
                flex-direction: column;
                align-items: flex-start;
                padding: 32px 28px;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }

            .nav-panel {
                padding: 12px 16px;
                gap: 10px;
            }

            .nav-links {
                display: none;
                position: absolute;
                top: calc(100% + 12px);
                left: 0;
                right: 0;
                background: var(--card-bg);
                border: 1px solid var(--border);
                border-radius: var(--radius-card);
                box-shadow: var(--shadow-card-hover);
                padding: 16px;
                flex-direction: column;
                align-items: stretch;
                gap: 8px;
                overflow: visible;
                min-width: auto;
            }

            .nav-links.open {
                display: flex;
            }

            .nav-link-card {
                width: 100%;
                justify-content: flex-start;
                font-size: 0.92rem;
                padding: 12px 16px;
            }

            .nav-hamburger {
                display: block;
            }

            .nav-cta-btn {
                display: none;
            }

            .nav-panel {
                position: relative;
            }

            .hero-content h1 {
                font-size: 1.55rem;
            }

            .hero-desc {
                font-size: 0.95rem;
            }

            .hero-card {
                padding: 24px 20px;
            }

            .hero-visual img {
                height: 200px;
            }

            .hero-stat-card {
                bottom: -12px;
                right: 8px;
                padding: 10px 14px;
            }

            .section {
                padding: 32px 0;
            }

            .section-header h2 {
                font-size: 1.4rem;
            }

            .step-card {
                padding: 20px 18px;
                gap: 16px;
            }

            .step-number {
                width: 44px;
                height: 44px;
                font-size: 1.1rem;
                border-radius: 10px;
            }

            .execution-grid {
                grid-template-columns: 1fr;
            }

            .deep-text-card {
                padding: 24px 20px;
            }

            .cta-content h2 {
                font-size: 1.4rem;
            }

            .cta-actions {
                width: 100%;
                flex-direction: column;
            }

            .btn-white,
            .btn-outline-white {
                width: 100%;
                justify-content: center;
            }

            .footer-top {
                grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
                gap: 24px;
            }

            .sticky-bottom-bar {
                padding: 8px 12px;
                gap: 8px;
            }

            .sticky-bar-inner {
                gap: 8px;
            }

            .sticky-bar-text {
                font-size: 0.75rem;
                white-space: nowrap;
                overflow: hidden;
                text-overflow: ellipsis;
            }

            .sticky-bar-btn,
            .sticky-bar-phone {
                padding: 7px 12px;
                font-size: 0.75rem;
            }

            .breadcrumb-nav {
                padding: 16px 0 0;
            }
        }

        @media (max-width: 520px) {
            body {
                font-size: 15px;
            }

            .nav-logo-text {
                font-size: 1.1rem;
            }

            .nav-logo-icon {
                width: 36px;
                height: 36px;
                font-size: 16px;
            }

            .hero-content h1 {
                font-size: 1.35rem;
            }

            .hero-actions {
                flex-direction: column;
                width: 100%;
            }

            .hero-actions .btn-primary,
            .hero-actions .btn-secondary {
                width: 100%;
                justify-content: center;
            }

            .hero-visual img {
                height: 170px;
            }

            .step-card {
                flex-direction: column;
                gap: 12px;
            }

            .step-number {
                width: 38px;
                height: 38px;
                font-size: 1rem;
                border-radius: 8px;
            }

            .cost-card {
                padding: 20px 16px;
            }

            .cost-info h3 {
                font-size: 1.2rem;
            }

            .faq-question {
                padding: 14px 16px;
                font-size: 0.9rem;
            }

            .faq-answer {
                padding: 0 16px;
                font-size: 0.86rem;
            }

            .sticky-bottom-bar {
                flex-direction: column;
                gap: 6px;
                padding: 6px 10px;
            }

            .sticky-bar-inner {
                gap: 6px;
                justify-content: center;
            }

            .sticky-bar-text {
                display: none;
            }
        }

/* roulang page: category6 */
:root {
            --primary: #1F6FEB;
            --primary-dark: #1B5FD0;
            --primary-light: #EEF4FF;
            --accent: #D98E04;
            --accent-hover: #C07D03;
            --bg: #F6F8FC;
            --card-bg: #FFFFFF;
            --border: #E6EDF6;
            --text-main: #1A2233;
            --text-secondary: #54647A;
            --text-muted: #7A879B;
            --danger: #D33A3A;
            --radius-card: 16px;
            --radius-img: 12px;
            --radius-btn: 10px;
            --radius-pill: 24px;
            --shadow-card: 0 4px 20px rgba(20, 40, 80, 0.06);
            --shadow-card-hover: 0 8px 28px rgba(20, 40, 80, 0.10);
            --shadow-nav: 0 2px 16px rgba(20, 40, 80, 0.05);
            --transition: 0.2s ease;
            --container: 1200px;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-main);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        main {
            flex: 1;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-img);
        }

        a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
            transition: color var(--transition);
        }

        a:hover {
            color: var(--primary-dark);
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible {
            outline: 3px solid rgba(31, 111, 235, 0.35);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 28px;
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            padding-top: 18px;
            position: relative;
            z-index: 100;
        }

        .nav-panel {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-nav);
            padding: 14px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: nowrap;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .nav-logo-icon {
            width: 42px;
            height: 42px;
            background: var(--primary);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 20px;
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }

        .nav-logo-text {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.2;
            letter-spacing: 0.5px;
            text-decoration: none;
        }

        .nav-logo-text:hover {
            color: var(--text-main);
        }

        .nav-logo-text span {
            color: var(--primary);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
            flex-shrink: 1;
            min-width: 0;
            padding: 2px 4px;
        }

        .nav-links::-webkit-scrollbar {
            display: none;
        }

        .nav-link-card {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 14px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 10px;
            font-size: 0.86rem;
            font-weight: 500;
            color: var(--text-secondary);
            text-decoration: none;
            white-space: nowrap;
            transition: all var(--transition);
            flex-shrink: 0;
        }

        .nav-link-card:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary);
            text-decoration: none;
        }

        .nav-link-card.active {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary);
            font-weight: 600;
        }

        .nav-link-icon {
            font-size: 0.9rem;
            opacity: 0.8;
        }

        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.9rem;
            border: none;
            cursor: pointer;
            text-decoration: none;
            white-space: nowrap;
            flex-shrink: 0;
            transition: all var(--transition);
        }

        .nav-cta-btn:hover {
            background: var(--primary-dark);
            color: #fff;
            text-decoration: none;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(31, 111, 235, 0.25);
        }

        .nav-hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--text-main);
            padding: 8px;
            border-radius: 8px;
        }

        /* Mobile drawer */
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(15, 30, 61, 0.5);
            z-index: 200;
            opacity: 0;
            transition: opacity 0.25s ease;
        }

        .mobile-nav-overlay.open {
            opacity: 1;
        }

        .mobile-drawer {
            position: fixed;
            top: 0;
            right: -320px;
            width: 300px;
            height: 100vh;
            background: var(--card-bg);
            border-radius: 16px 0 0 16px;
            box-shadow: -8px 0 30px rgba(0, 0, 0, 0.12);
            padding: 24px 20px;
            z-index: 210;
            transition: right 0.3s ease;
            overflow-y: auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .mobile-drawer.open {
            right: 0;
        }

        .mobile-drawer-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 16px;
        }

        .mobile-drawer-title {
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--text-main);
        }

        .mobile-drawer-close {
            background: none;
            border: none;
            font-size: 1.8rem;
            cursor: pointer;
            color: var(--text-muted);
            padding: 4px 8px;
            border-radius: 8px;
            transition: color var(--transition);
            line-height: 1;
        }

        .mobile-drawer-close:hover {
            color: var(--text-main);
        }

        .mobile-drawer .nav-link-card {
            width: 100%;
            padding: 12px 16px;
            font-size: 0.95rem;
        }

        .mobile-drawer .nav-cta-btn {
            width: 100%;
            justify-content: center;
            margin-top: 12px;
        }

        /* ========== BREADCRUMB ========== */
        .breadcrumb-section {
            padding: 24px 0 0;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: color var(--transition);
        }

        .breadcrumb a:hover {
            color: var(--primary);
        }

        .breadcrumb .sep {
            color: var(--text-muted);
            user-select: none;
        }

        .breadcrumb .current {
            color: var(--primary);
            font-weight: 500;
        }

        /* ========== KNOWLEDGE HERO ========== */
        .knowledge-hero {
            padding: 32px 0 48px;
        }

        .knowledge-hero-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 40px 44px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
            position: relative;
            overflow: hidden;
        }

        .knowledge-hero-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
        }

        .knowledge-hero-text {
            flex: 1 1 480px;
            max-width: 640px;
        }

        .knowledge-hero-text .badge-row {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
            flex-wrap: wrap;
        }

        .badge-light {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 14px;
            background: var(--primary-light);
            border-radius: var(--radius-pill);
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--primary);
            letter-spacing: 0.3px;
        }

        .badge-accent {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 14px;
            background: #FFF8EC;
            border-radius: var(--radius-pill);
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--accent);
            letter-spacing: 0.3px;
        }

        .knowledge-hero-text h1 {
            font-size: 2.2rem;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 16px;
            color: var(--text-main);
            letter-spacing: 0.5px;
        }

        .knowledge-hero-text .hero-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 24px;
        }

        .hero-search-box {
            display: flex;
            gap: 10px;
            max-width: 520px;
            flex-wrap: wrap;
        }

        .hero-search-input {
            flex: 1;
            min-width: 200px;
            padding: 12px 18px;
            border: 1px solid var(--border);
            border-radius: var(--radius-btn);
            font-size: 0.95rem;
            color: var(--text-main);
            background: var(--bg);
            transition: all var(--transition);
        }

        .hero-search-input:focus {
            outline: none;
            border-color: var(--primary);
            background: #fff;
            box-shadow: 0 0 0 3px rgba(31, 111, 235, 0.12);
        }

        .hero-search-input::placeholder {
            color: var(--text-muted);
        }

        .hero-search-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 12px 24px;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.92rem;
            cursor: pointer;
            transition: all var(--transition);
            white-space: nowrap;
        }

        .hero-search-btn:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(31, 111, 235, 0.25);
        }

        .knowledge-hero-visual {
            flex: 0 0 320px;
            max-width: 360px;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card-hover);
            position: relative;
        }

        .knowledge-hero-visual img {
            width: 100%;
            height: 260px;
            object-fit: cover;
            border-radius: var(--radius-card);
        }

        .hero-visual-tag {
            position: absolute;
            bottom: 16px;
            left: 16px;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(8px);
            padding: 8px 16px;
            border-radius: 10px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--text-main);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        /* ========== SECTION HEADINGS ========== */
        .section-heading {
            margin-bottom: 32px;
        }

        .section-heading h2 {
            font-size: 1.7rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
            letter-spacing: 0.3px;
            line-height: 1.35;
        }

        .section-heading p {
            color: var(--text-secondary);
            font-size: 0.98rem;
            max-width: 720px;
            line-height: 1.75;
        }

        /* ========== KNOWLEDGE CATEGORY GRID ========== */
        .knowledge-categories {
            padding: 0 0 56px;
        }

        .cat-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
        }

        .cat-entry-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 22px 20px;
            display: flex;
            align-items: flex-start;
            gap: 14px;
            text-decoration: none;
            transition: all var(--transition);
            position: relative;
        }

        .cat-entry-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--primary);
            text-decoration: none;
        }

        .cat-entry-icon {
            width: 44px;
            height: 44px;
            background: var(--primary-light);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            flex-shrink: 0;
        }

        .cat-entry-content h3 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .cat-entry-content p {
            font-size: 0.82rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 0;
        }

        .cat-entry-arrow {
            position: absolute;
            top: 22px;
            right: 20px;
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: all var(--transition);
        }

        .cat-entry-card:hover .cat-entry-arrow {
            color: var(--primary);
            transform: translateX(3px);
        }

        /* ========== DOCUMENT LIST ========== */
        .doc-list-section {
            padding: 0 0 64px;
        }

        .doc-list {
            display: grid;
            grid-template-columns: 1fr;
            gap: 16px;
        }

        .doc-item-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
            transition: all var(--transition);
            text-decoration: none;
        }

        .doc-item-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: var(--primary-light);
            transform: translateY(-2px);
            text-decoration: none;
        }

        .doc-item-main {
            flex: 1 1 420px;
            min-width: 0;
            display: flex;
            align-items: flex-start;
            gap: 16px;
        }

        .doc-thumb {
            flex: 0 0 100px;
            width: 100px;
            height: 72px;
            border-radius: 10px;
            overflow: hidden;
        }

        .doc-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 10px;
        }

        .doc-info h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .doc-info p {
            font-size: 0.86rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .doc-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        .doc-tag {
            display: inline-flex;
            align-items: center;
            padding: 3px 10px;
            background: var(--primary-light);
            border-radius: var(--radius-pill);
            color: var(--primary);
            font-weight: 500;
            font-size: 0.72rem;
        }

        .doc-read-btn {
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 18px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-btn);
            font-size: 0.82rem;
            font-weight: 500;
            color: var(--text-secondary);
            text-decoration: none;
            transition: all var(--transition);
            white-space: nowrap;
        }

        .doc-item-card:hover .doc-read-btn {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }

        /* ========== DEEP READING ========== */
        .deep-reading {
            padding: 0 0 64px;
        }

        .deep-reading-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            display: flex;
            flex-wrap: wrap;
        }

        .deep-reading-img {
            flex: 1 1 380px;
            min-height: 280px;
            background-image: url('/assets/images/coverpic/cover-5.webp');
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .deep-reading-img::after {
            content: '金年会年会攻略精选';
            position: absolute;
            bottom: 16px;
            left: 16px;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(8px);
            padding: 8px 16px;
            border-radius: 10px;
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--text-main);
        }

        .deep-reading-body {
            flex: 1 1 420px;
            padding: 36px 40px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .deep-reading-body h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 16px;
            line-height: 1.4;
        }

        .deep-reading-body p {
            color: var(--text-secondary);
            line-height: 1.85;
            font-size: 0.95rem;
            margin-bottom: 20px;
        }

        .deep-reading-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 26px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.9rem;
            text-decoration: none;
            transition: all var(--transition);
            align-self: flex-start;
        }

        .deep-reading-cta:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(31, 111, 235, 0.25);
            text-decoration: none;
        }

        /* ========== SUBSCRIBE CTA ========== */
        .subscribe-section {
            padding: 0 0 64px;
        }

        .subscribe-card {
            background: linear-gradient(135deg, #1F6FEB 0%, #1B5FD0 60%, #1648A0 100%);
            border-radius: var(--radius-card);
            box-shadow: 0 8px 30px rgba(31, 111, 235, 0.2);
            padding: 44px 48px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 30px;
            flex-wrap: wrap;
            position: relative;
            overflow: hidden;
        }

        .subscribe-card::after {
            content: '';
            position: absolute;
            top: -60px;
            right: -40px;
            width: 220px;
            height: 220px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 50%;
        }

        .subscribe-text {
            flex: 1 1 380px;
            position: relative;
            z-index: 1;
        }

        .subscribe-text h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .subscribe-text p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 0.95rem;
            line-height: 1.75;
            margin-bottom: 0;
        }

        .subscribe-form {
            flex: 1 1 360px;
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
            background: rgba(255, 255, 255, 0.12);
            padding: 8px;
            border-radius: 14px;
            max-width: 520px;
        }

        .subscribe-input {
            flex: 1;
            min-width: 180px;
            padding: 12px 18px;
            border: 1px solid rgba(255, 255, 255, 0.25);
            border-radius: 10px;
            font-size: 0.92rem;
            background: #fff;
            color: var(--text-main);
            transition: all var(--transition);
        }

        .subscribe-input:focus {
            outline: none;
            border-color: #fff;
            box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.25);
        }

        .subscribe-input::placeholder {
            color: var(--text-muted);
        }

        .subscribe-btn {
            padding: 12px 26px;
            background: var(--accent);
            color: #fff;
            border: none;
            border-radius: 10px;
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            white-space: nowrap;
            transition: all var(--transition);
        }

        .subscribe-btn:hover {
            background: var(--accent-hover);
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(217, 142, 4, 0.3);
        }

        .subscribe-note {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.78rem;
            margin-top: 8px;
            position: relative;
            z-index: 1;
            flex-basis: 100%;
        }

        /* ========== FAQ ========== */
        .faq-section {
            padding: 0 0 64px;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 900px;
        }

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item.open {
            border-color: var(--primary);
            box-shadow: var(--shadow-card-hover);
        }

        .faq-question {
            width: 100%;
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            background: none;
            border: none;
            cursor: pointer;
            text-align: left;
            font-size: 0.98rem;
            font-weight: 600;
            color: var(--text-main);
            transition: all var(--transition);
        }

        .faq-question:hover {
            color: var(--primary);
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--bg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.9rem;
            color: var(--text-muted);
            transition: all var(--transition);
        }

        .faq-item.open .faq-question .faq-icon {
            background: var(--primary);
            color: #fff;
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 24px;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        .faq-answer p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.8;
            margin-bottom: 0;
        }

        /* ========== BOTTOM CTA ========== */
        .bottom-cta {
            padding: 0 0 80px;
        }

        .bottom-cta-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 44px 48px;
            text-align: center;
        }

        .bottom-cta-card h2 {
            font-size: 1.7rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .bottom-cta-card p {
            color: var(--text-secondary);
            font-size: 0.98rem;
            max-width: 640px;
            margin: 0 auto 28px;
            line-height: 1.75;
        }

        .cta-btn-group {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
        }

        .btn-primary-lg {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 1rem;
            text-decoration: none;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
        }

        .btn-primary-lg:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(31, 111, 235, 0.3);
            text-decoration: none;
        }

        .btn-secondary-lg {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: #fff;
            color: var(--text-main);
            border: 1px solid var(--border);
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 1rem;
            text-decoration: none;
            cursor: pointer;
            transition: all var(--transition);
        }

        .btn-secondary-lg:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary);
            text-decoration: none;
        }

        /* ========== FIXED BOTTOM BAR ========== */
        .fixed-bottom-bar {
            position: fixed;
            bottom: 16px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 95;
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border);
            border-radius: 14px;
            box-shadow: 0 4px 24px rgba(20, 40, 80, 0.12);
            padding: 10px 18px;
            display: flex;
            align-items: center;
            gap: 12px;
            max-width: 560px;
            width: calc(100% - 32px);
            transition: opacity 0.3s ease, transform 0.3s ease;
        }

        .fixed-bottom-bar.hidden {
            opacity: 0;
            pointer-events: none;
            transform: translateX(-50%) translateY(20px);
        }

        .fixed-bottom-bar .bar-text {
            flex: 1;
            min-width: 0;
            font-size: 0.82rem;
            color: var(--text-secondary);
            line-height: 1.4;
        }

        .fixed-bottom-bar .bar-text strong {
            color: var(--text-main);
            font-weight: 600;
        }

        .bar-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 8px 18px;
            background: var(--primary);
            color: #fff;
            border-radius: 8px;
            font-weight: 600;
            font-size: 0.82rem;
            border: none;
            cursor: pointer;
            text-decoration: none;
            white-space: nowrap;
            transition: all var(--transition);
            flex-shrink: 0;
        }

        .bar-cta-btn:hover {
            background: var(--primary-dark);
            color: #fff;
            text-decoration: none;
        }

        .bar-phone-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 8px 14px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 8px;
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--text-main);
            text-decoration: none;
            white-space: nowrap;
            flex-shrink: 0;
            transition: all var(--transition);
        }

        .bar-phone-link:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary);
            text-decoration: none;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--card-bg);
            border-top: 1px solid var(--border);
            margin-top: auto;
            padding: 48px 0 32px;
        }

        .footer-container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 28px;
        }

        .footer-top {
            display: grid;
            grid-template-columns: 2fr 1.2fr 1.2fr 1.4fr;
            gap: 36px;
            margin-bottom: 36px;
        }

        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }

        .footer-col p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 8px;
        }

        .footer-col a {
            display: block;
            font-size: 0.88rem;
            color: var(--text-secondary);
            text-decoration: none;
            margin-bottom: 8px;
            transition: color var(--transition);
        }

        .footer-col a:hover {
            color: var(--primary);
            text-decoration: underline;
        }

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding-top: 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .footer-bottom p {
            margin-bottom: 0;
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }

        .footer-bottom a {
            color: var(--text-muted);
            text-decoration: none;
            transition: color var(--transition);
        }

        .footer-bottom a:hover {
            color: var(--primary);
            text-decoration: underline;
        }

        .footer-sep {
            color: var(--border);
            user-select: none;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .footer-top {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }

            .knowledge-hero-card {
                padding: 32px 28px;
            }

            .knowledge-hero-text h1 {
                font-size: 1.8rem;
            }

            .knowledge-hero-visual {
                flex: 0 0 260px;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }

            .nav-hamburger {
                display: block;
            }

            .nav-cta-btn {
                display: none;
            }

            .mobile-nav-overlay {
                display: block;
                pointer-events: none;
            }

            .mobile-nav-overlay.open {
                pointer-events: auto;
            }

            .cat-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .knowledge-hero-card {
                flex-direction: column;
                padding: 28px 22px;
            }

            .knowledge-hero-visual {
                flex: 1 1 auto;
                width: 100%;
                max-width: none;
            }

            .knowledge-hero-visual img {
                height: 200px;
            }

            .doc-item-card {
                padding: 16px 18px;
            }

            .doc-item-main {
                flex: 1 1 100%;
            }

            .doc-thumb {
                flex: 0 0 80px;
                width: 80px;
                height: 60px;
            }

            .doc-read-btn {
                width: 100%;
                justify-content: center;
            }

            .subscribe-card {
                padding: 32px 24px;
            }

            .deep-reading-body {
                padding: 28px 24px;
            }

            .footer-top {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .footer-container {
                padding: 0 16px;
            }

            .site-header {
                padding-top: 10px;
            }

            .nav-panel {
                padding: 10px 14px;
                border-radius: 12px;
            }

            .nav-logo-icon {
                width: 36px;
                height: 36px;
                font-size: 17px;
                border-radius: 10px;
            }

            .nav-logo-text {
                font-size: 1.15rem;
            }

            .knowledge-hero {
                padding: 20px 0 32px;
            }

            .knowledge-hero-card {
                padding: 24px 18px;
                border-radius: 14px;
            }

            .knowledge-hero-text h1 {
                font-size: 1.5rem;
            }

            .knowledge-hero-text .hero-desc {
                font-size: 0.92rem;
            }

            .cat-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }

            .knowledge-categories,
            .doc-list-section,
            .deep-reading,
            .subscribe-section,
            .faq-section,
            .bottom-cta {
                padding-bottom: 40px;
            }

            .section-heading h2 {
                font-size: 1.35rem;
            }

            .doc-info h3 {
                font-size: 0.95rem;
            }

            .doc-info p {
                font-size: 0.8rem;
                -webkit-line-clamp: 2;
            }

            .doc-thumb {
                flex: 0 0 70px;
                width: 70px;
                height: 52px;
            }

            .deep-reading-img {
                min-height: 180px;
                flex-basis: 100%;
            }

            .deep-reading-body h2 {
                font-size: 1.25rem;
            }

            .subscribe-card {
                padding: 28px 20px;
                border-radius: 14px;
            }

            .subscribe-text h2 {
                font-size: 1.3rem;
            }

            .faq-question {
                font-size: 0.88rem;
                padding: 14px 16px;
            }

            .faq-answer p {
                font-size: 0.82rem;
            }

            .bottom-cta-card {
                padding: 28px 20px;
                border-radius: 14px;
            }

            .bottom-cta-card h2 {
                font-size: 1.3rem;
            }

            .btn-primary-lg,
            .btn-secondary-lg {
                padding: 11px 22px;
                font-size: 0.88rem;
                width: 100%;
                justify-content: center;
            }

            .fixed-bottom-bar {
                bottom: 10px;
                padding: 8px 12px;
                border-radius: 10px;
                width: calc(100% - 20px);
                gap: 6px;
            }

            .fixed-bottom-bar .bar-text {
                font-size: 0.72rem;
            }

            .bar-cta-btn,
            .bar-phone-link {
                padding: 7px 12px;
                font-size: 0.72rem;
            }

            .hero-search-box {
                flex-direction: column;
            }

            .hero-search-btn {
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: category7 */
:root {
            --primary: #1F6FEB;
            --primary-dark: #1B5FD0;
            --primary-light: #EEF4FF;
            --accent: #D98E04;
            --accent-hover: #C07D03;
            --bg: #F6F8FC;
            --card-bg: #FFFFFF;
            --border: #E6EDF6;
            --text-main: #1A2233;
            --text-secondary: #54647A;
            --text-muted: #7A879B;
            --danger: #D33A3A;
            --radius-card: 16px;
            --radius-img: 12px;
            --radius-btn: 10px;
            --radius-pill: 24px;
            --shadow-card: 0 4px 20px rgba(20, 40, 80, 0.06);
            --shadow-card-hover: 0 8px 28px rgba(20, 40, 80, 0.10);
            --shadow-nav: 0 2px 16px rgba(20, 40, 80, 0.05);
            --transition: 0.2s ease;
            --container: 1200px;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-main);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-bottom: 72px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-img);
        }

        a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
            transition: color var(--transition);
        }

        a:hover {
            color: var(--primary-dark);
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible {
            outline: 3px solid rgba(31, 111, 235, 0.35);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 28px;
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            padding-top: 18px;
            position: relative;
            z-index: 100;
        }

        .nav-panel {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-nav);
            padding: 14px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: nowrap;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            text-decoration: none;
        }

        .nav-logo-icon {
            width: 42px;
            height: 42px;
            background: var(--primary);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 20px;
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }

        .nav-logo-text {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.2;
            letter-spacing: 0.5px;
        }

        .nav-logo-text span {
            color: var(--primary);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
            flex-shrink: 1;
            min-width: 0;
            padding: 2px 4px;
        }

        .nav-links::-webkit-scrollbar {
            display: none;
        }

        .nav-link-card {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 14px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 10px;
            font-size: 0.86rem;
            font-weight: 500;
            color: var(--text-secondary);
            text-decoration: none;
            white-space: nowrap;
            transition: all var(--transition);
            flex-shrink: 0;
        }

        .nav-link-card:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary);
            text-decoration: none;
        }

        .nav-link-card.active {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary);
            font-weight: 600;
            box-shadow: 0 0 0 1px rgba(31, 111, 235, 0.15);
        }

        .nav-link-icon {
            font-size: 0.9rem;
            opacity: 0.8;
        }

        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.9rem;
            border: none;
            cursor: pointer;
            text-decoration: none;
            white-space: nowrap;
            flex-shrink: 0;
            transition: all var(--transition);
        }

        .nav-cta-btn:hover {
            background: var(--primary-dark);
            color: #fff;
            text-decoration: none;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(31, 111, 235, 0.25);
        }

        .nav-hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--text-main);
            padding: 8px;
            border-radius: 8px;
            flex-shrink: 0;
        }

        .mobile-nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(15, 30, 61, 0.45);
            z-index: 999;
            opacity: 0;
            transition: opacity 0.25s ease;
        }

        .mobile-nav-overlay.open {
            opacity: 1;
        }

        .mobile-drawer {
            position: fixed;
            top: 0;
            right: -320px;
            width: 300px;
            max-width: 85vw;
            height: 100vh;
            background: var(--card-bg);
            border-left: 1px solid var(--border);
            box-shadow: -8px 0 40px rgba(20, 40, 80, 0.12);
            z-index: 1000;
            padding: 24px 20px;
            overflow-y: auto;
            transition: right 0.3s ease;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .mobile-drawer.open {
            right: 0;
        }

        .mobile-drawer-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 16px;
        }

        .mobile-drawer-close {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 8px;
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            font-size: 1.2rem;
            color: var(--text-main);
            transition: all var(--transition);
        }

        .mobile-drawer-close:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary);
        }

        .mobile-nav-link {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 16px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 10px;
            color: var(--text-secondary);
            text-decoration: none;
            font-weight: 500;
            font-size: 0.92rem;
            transition: all var(--transition);
        }

        .mobile-nav-link:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary);
            text-decoration: none;
        }

        .mobile-nav-link.active {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary);
            font-weight: 600;
        }

        /* ========== BREADCRUMB ========== */
        .breadcrumb-section {
            padding: 18px 0 4px;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: color var(--transition);
        }

        .breadcrumb a:hover {
            color: var(--primary);
            text-decoration: underline;
        }

        .breadcrumb-sep {
            color: var(--text-muted);
            opacity: 0.6;
        }

        .breadcrumb-current {
            color: var(--primary);
            font-weight: 500;
        }

        /* ========== HERO (拼团转化) ========== */
        .hero-cases {
            padding: 36px 0 48px;
        }

        .hero-cases-grid {
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 36px;
            align-items: stretch;
        }

        .hero-cases-main {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 40px 36px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-light);
            border: 1px solid rgba(31, 111, 235, 0.25);
            color: var(--primary);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            width: fit-content;
            margin-bottom: 18px;
        }

        .hero-cases-main h1 {
            font-size: 2.35rem;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-main);
            letter-spacing: 0.5px;
            margin-bottom: 16px;
        }

        .hero-cases-main h1 .highlight {
            color: var(--primary);
        }

        .hero-cases-sub {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 26px;
            max-width: 520px;
        }

        .hero-cta-row {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 24px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            text-decoration: none;
            transition: all var(--transition);
            white-space: nowrap;
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            text-decoration: none;
            transform: translateY(-1px);
            box-shadow: 0 8px 22px rgba(31, 111, 235, 0.3);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: var(--card-bg);
            color: var(--text-main);
            border: 1px solid rgba(31, 111, 235, 0.4);
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            text-decoration: none;
            transition: all var(--transition);
            white-space: nowrap;
        }

        .btn-secondary:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary);
            text-decoration: none;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(31, 111, 235, 0.12);
        }

        .btn-accent {
            background: var(--accent);
            color: #fff;
        }

        .btn-accent:hover {
            background: var(--accent-hover);
            color: #fff;
            box-shadow: 0 8px 22px rgba(217, 142, 4, 0.3);
        }

        .hero-group-proof {
            display: flex;
            align-items: center;
            gap: 12px;
            padding-top: 18px;
            border-top: 1px solid var(--border);
        }

        .hero-group-proof .proof-icon {
            width: 44px;
            height: 44px;
            background: rgba(217, 142, 4, 0.12);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            flex-shrink: 0;
        }

        .hero-group-proof .proof-text {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        .hero-group-proof .proof-text strong {
            color: var(--text-main);
            font-weight: 700;
        }

        .hero-cases-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 28px 24px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            position: relative;
            overflow: hidden;
        }

        .hero-cases-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
        }

        .group-badge-center {
            text-align: center;
            margin-bottom: 20px;
        }

        .group-number {
            font-size: 3.2rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.1;
            letter-spacing: -1px;
        }

        .group-number-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        .group-progress-wrap {
            margin-bottom: 18px;
        }

        .group-progress-bar {
            width: 100%;
            height: 10px;
            background: var(--bg);
            border-radius: 8px;
            overflow: hidden;
            border: 1px solid var(--border);
        }

        .group-progress-fill {
            height: 100%;
            background: linear-gradient(90deg, var(--primary), #4D8DFF);
            border-radius: 8px;
            transition: width 0.5s ease;
        }

        .group-progress-label {
            display: flex;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 8px;
        }

        .group-mini-stats {
            display: flex;
            gap: 16px;
            justify-content: center;
            padding: 16px 0;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            margin-bottom: 16px;
        }

        .group-mini-stat {
            text-align: center;
        }

        .group-mini-stat strong {
            display: block;
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text-main);
        }

        .group-mini-stat span {
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        .group-btn-row {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }

        .group-btn-row .btn-primary,
        .group-btn-row .btn-secondary {
            flex: 1;
            justify-content: center;
            padding: 11px 16px;
            font-size: 0.88rem;
        }

        /* ========== CASE IMAGE WALL ========== */
        .case-wall-section {
            padding: 48px 0 56px;
        }

        .section-header-row {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 20px;
            margin-bottom: 28px;
            flex-wrap: wrap;
        }

        .section-title-group h2 {
            font-size: 1.9rem;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.35;
            letter-spacing: 0.4px;
            margin-bottom: 8px;
        }

        .section-title-group p {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 560px;
            line-height: 1.7;
        }

        .section-link-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-weight: 600;
            font-size: 0.9rem;
            text-decoration: none;
            white-space: nowrap;
            transition: all var(--transition);
        }

        .section-link-more:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }

        .case-wall-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
        }

        .case-wall-item {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            aspect-ratio: 4/3;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
            cursor: pointer;
        }

        .case-wall-item:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }

        .case-wall-item img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
        }

        .case-wall-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(15, 30, 61, 0.82) 100%);
            display: flex;
            align-items: flex-end;
            padding: 14px;
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .case-wall-item:hover .case-wall-overlay {
            opacity: 1;
        }

        .case-wall-overlay span {
            color: #fff;
            font-size: 0.85rem;
            font-weight: 600;
            line-height: 1.4;
        }

        /* ========== FEATURED CASES ========== */
        .featured-cases {
            padding: 48px 0 56px;
        }

        .featured-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 28px;
            display: grid;
            grid-template-columns: 280px 1fr;
            gap: 28px;
            margin-bottom: 20px;
            transition: all var(--transition);
        }

        .featured-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .featured-card-img {
            border-radius: var(--radius-img);
            overflow: hidden;
            aspect-ratio: 16/10;
            border: 1px solid var(--border);
        }

        .featured-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
        }

        .featured-card-body {
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .featured-card-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-light);
            border: 1px solid rgba(31, 111, 235, 0.25);
            color: var(--primary);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            width: fit-content;
            margin-bottom: 12px;
        }

        .featured-card-body h3 {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .featured-card-body p {
            font-size: 0.94rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
        }

        .featured-case-meta {
            display: flex;
            gap: 18px;
            flex-wrap: wrap;
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        .featured-case-meta span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* ========== CATEGORY QUICK LINKS ========== */
        .quick-links-section {
            padding: 48px 0 56px;
        }

        .quick-links-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }

        .quick-link-card {
            display: flex;
            align-items: center;
            gap: 14px;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 20px 22px;
            box-shadow: var(--shadow-card);
            text-decoration: none;
            transition: all var(--transition);
        }

        .quick-link-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            text-decoration: none;
            border-color: rgba(31, 111, 235, 0.4);
        }

        .quick-link-icon {
            width: 48px;
            height: 48px;
            background: var(--primary-light);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            flex-shrink: 0;
        }

        .quick-link-info h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 4px;
        }

        .quick-link-info p {
            font-size: 0.82rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* ========== BRAND INTRO ========== */
        .brand-intro-section {
            padding: 48px 0 56px;
        }

        .brand-intro-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 36px 32px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: center;
        }

        .brand-intro-text h2 {
            font-size: 1.7rem;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.35;
            margin-bottom: 16px;
        }

        .brand-intro-text p {
            font-size: 0.98rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 12px;
        }

        .brand-intro-text p:last-child {
            margin-bottom: 0;
        }

        .brand-intro-image {
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            aspect-ratio: 16/10;
        }

        .brand-intro-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
        }

        /* ========== FAQ ========== */
        .faq-section {
            padding: 48px 0 56px;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item:hover {
            box-shadow: var(--shadow-card-hover);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-main);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: all var(--transition);
        }

        .faq-question:hover {
            color: var(--primary);
        }

        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.1rem;
            font-weight: 600;
            transition: transform 0.3s ease;
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 22px;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 22px 20px;
        }

        .faq-answer p {
            font-size: 0.94rem;
            color: var(--text-secondary);
            line-height: 1.8;
            background: var(--primary-light);
            border-radius: 10px;
            padding: 16px 18px;
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            padding: 48px 0 56px;
        }

        .cta-card {
            background: linear-gradient(135deg, var(--primary) 0%, #1557B8 100%);
            border-radius: var(--radius-card);
            padding: 44px 36px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 28px;
            flex-wrap: wrap;
            box-shadow: 0 12px 36px rgba(31, 111, 235, 0.25);
        }

        .cta-card-text h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: #fff;
            line-height: 1.35;
            margin-bottom: 10px;
        }

        .cta-card-text p {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 480px;
            line-height: 1.7;
        }

        .cta-card-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        .cta-card-actions .btn-primary {
            background: #fff;
            color: var(--primary);
        }

        .cta-card-actions .btn-primary:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
            box-shadow: 0 6px 18px rgba(255, 255, 255, 0.25);
        }

        .cta-card-actions .btn-secondary {
            background: transparent;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.5);
        }

        .cta-card-actions .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
            color: #fff;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--card-bg);
            border-top: 1px solid var(--border);
            padding: 48px 0 28px;
            margin-top: 20px;
        }

        .footer-container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 28px;
        }

        .footer-top {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-col h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 14px;
        }

        .footer-col p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 6px;
        }

        .footer-col a {
            display: block;
            font-size: 0.88rem;
            color: var(--text-secondary);
            text-decoration: none;
            margin-bottom: 8px;
            transition: color var(--transition);
        }

        .footer-col a:hover {
            color: var(--primary);
            text-decoration: underline;
        }

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding-top: 20px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            text-align: center;
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        .footer-bottom a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: color var(--transition);
        }

        .footer-bottom a:hover {
            color: var(--primary);
            text-decoration: underline;
        }

        .footer-sep {
            margin: 0 6px;
            opacity: 0.5;
        }

        /* ========== BOTTOM FIXED BAR ========== */
        .bottom-fixed-bar {
            position: fixed;
            bottom: 16px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 900;
            width: auto;
            max-width: 680px;
            background: rgba(255, 255, 255, 0.96);
            border: 1px solid var(--border);
            border-radius: 14px;
            box-shadow: 0 8px 30px rgba(20, 40, 80, 0.15);
            padding: 10px 16px;
            display: none;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
        }

        .bottom-fixed-bar .bfb-text {
            font-size: 0.88rem;
            color: var(--text-main);
            font-weight: 500;
        }

        .bottom-fixed-bar .bfb-actions {
            display: flex;
            gap: 10px;
            flex-wrap: nowrap;
        }

        .bottom-fixed-bar .bfb-actions .btn-primary,
        .bottom-fixed-bar .bfb-actions .btn-secondary {
            padding: 9px 16px;
            font-size: 0.85rem;
            border-radius: 8px;
            white-space: nowrap;
            text-decoration: none;
        }

        .bottom-fixed-bar .bfb-phone {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            color: var(--text-secondary);
            text-decoration: none;
            white-space: nowrap;
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            .hero-cases-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .case-wall-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .quick-links-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-top {
                grid-template-columns: repeat(2, 1fr);
            }
            .featured-card {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .brand-intro-card {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-panel {
                flex-wrap: wrap;
                justify-content: space-between;
            }
            .nav-links {
                display: none;
            }
            .nav-cta-btn {
                display: none;
            }
            .nav-hamburger {
                display: block;
            }
            .hero-cases-main {
                padding: 28px 22px;
            }
            .hero-cases-main h1 {
                font-size: 1.8rem;
            }
            .hero-cases-sub {
                font-size: 0.95rem;
            }
            .section-title-group h2 {
                font-size: 1.5rem;
            }
            .cta-card {
                padding: 28px 22px;
                text-align: center;
                justify-content: center;
            }
            .cta-card-actions {
                justify-content: center;
                width: 100%;
            }
        }

        @media (max-width: 640px) {
            .case-wall-grid {
                grid-template-columns: 1fr;
            }
            .quick-links-grid {
                grid-template-columns: 1fr;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .hero-cta-row {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-cta-row .btn-primary,
            .hero-cta-row .btn-secondary {
                width: 100%;
                justify-content: center;
            }
            .group-btn-row {
                flex-direction: column;
            }
            .group-btn-row .btn-primary,
            .group-btn-row .btn-secondary {
                width: 100%;
            }
            .bottom-fixed-bar {
                bottom: 8px;
                left: 8px;
                right: 8px;
                transform: none;
                max-width: none;
            }
            .bottom-fixed-bar .bfb-actions {
                gap: 6px;
            }
            .bottom-fixed-bar .bfb-phone {
                display: none;
            }
        }