/* roulang page: index */
:root {
            --primary: #1A5FAA;
            --primary-hover: #164d8a;
            --primary-light: #E6F0FA;
            --primary-faint: #E9F0F7;
            --bg-page: #F5F8FC;
            --bg-card: #FFFFFF;
            --bg-card-soft: #FBFDFF;
            --text-primary: #1A2B3C;
            --text-secondary: #52687A;
            --text-muted: #7A8FA3;
            --border-color: #DCE6F0;
            --border-focus: rgba(26, 95, 170, 0.45);
            --radius-card: 10px;
            --radius-btn: 8px;
            --radius-nav: 14px;
            --radius-sm: 6px;
            --shadow-card: 0 4px 16px rgba(26, 43, 60, 0.06);
            --shadow-card-hover: 0 8px 24px rgba(26, 95, 170, 0.12);
            --shadow-nav: 0 2px 12px rgba(26, 43, 60, 0.05);
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            --section-gap: 80px;
            --section-gap-mobile: 48px;
            --card-padding: 28px;
            --card-padding-mobile: 18px;
            --max-width: 1200px;
        }

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

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

        body {
            font-family: var(--font-stack);
            font-size: 15px;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--bg-page);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition-base), text-decoration var(--transition-base);
        }

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

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

        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .section-gap {
            padding-top: var(--section-gap);
            padding-bottom: var(--section-gap);
        }

        .section-gap-sm {
            padding-top: 48px;
            padding-bottom: 48px;
        }

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

        .section-heading h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 10px 0;
            letter-spacing: -0.01em;
        }

        .section-heading p {
            font-size: 16px;
            color: var(--text-secondary);
            margin: 0;
            max-width: 720px;
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 4px 14px;
            border-radius: 20px;
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            padding: 16px 0 12px;
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--bg-page);
        }

        .nav-panel {
            background: var(--bg-card);
            border-radius: var(--radius-nav);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-nav);
            padding: 8px 16px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: nowrap;
            transition: box-shadow var(--transition-base);
        }

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

        .nav-brand .brand-icon {
            width: 38px;
            height: 38px;
            background: var(--primary);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            letter-spacing: -0.01em;
        }

        .nav-brand .brand-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
            justify-content: center;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: thin;
            -webkit-overflow-scrolling: touch;
            padding: 2px 4px;
        }

        .nav-links::-webkit-scrollbar {
            height: 4px;
        }

        .nav-links::-webkit-scrollbar-thumb {
            background: var(--border-color);
            border-radius: 4px;
        }

        .nav-card-link {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 8px 14px;
            border-radius: 8px;
            font-size: 13.5px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            border: 1px solid transparent;
            transition: all var(--transition-base);
            flex-shrink: 0;
        }

        .nav-card-link i {
            font-size: 14px;
            color: var(--text-muted);
            transition: color var(--transition-base);
        }

        .nav-card-link:hover {
            background: var(--primary-faint);
            color: var(--primary);
            text-decoration: none;
            border-color: var(--border-color);
            box-shadow: 0 2px 8px rgba(26, 95, 170, 0.06);
        }

        .nav-card-link:hover i {
            color: var(--primary);
        }

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

        .nav-card-link.active i {
            color: var(--primary);
        }

        .nav-cta {
            flex-shrink: 0;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: var(--radius-btn);
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: all var(--transition-base);
            text-decoration: none;
            white-space: nowrap;
            letter-spacing: 0.01em;
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            color: #fff;
            text-decoration: none;
            box-shadow: 0 4px 12px rgba(26, 95, 170, 0.3);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 6px rgba(26, 95, 170, 0.2);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            color: var(--primary);
            border: 1.5px solid var(--primary);
            border-radius: var(--radius-btn);
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: all var(--transition-base);
            text-decoration: none;
            white-space: nowrap;
            letter-spacing: 0.01em;
        }

        .btn-outline:hover {
            background: var(--primary-faint);
            color: var(--primary-hover);
            text-decoration: none;
            box-shadow: 0 4px 12px rgba(26, 95, 170, 0.1);
            transform: translateY(-1px);
        }

        .btn-outline:active {
            transform: translateY(0);
        }

        .nav-toggle {
            display: none;
            background: none;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 8px 12px;
            font-size: 18px;
            color: var(--text-primary);
            cursor: pointer;
            transition: all var(--transition-base);
            flex-shrink: 0;
        }

        .nav-toggle:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .mobile-menu {
            display: none;
            background: var(--bg-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            padding: 16px;
            margin-top: 8px;
            flex-direction: column;
            gap: 6px;
        }

        .mobile-menu.open {
            display: flex;
        }

        .mobile-menu .nav-card-link {
            width: 100%;
            justify-content: flex-start;
            padding: 12px 14px;
            font-size: 14px;
        }

        .mobile-menu .btn-primary {
            justify-content: center;
            margin-top: 8px;
            width: 100%;
        }

        /* ===== Hero ===== */
        .hero-section {
            padding: 48px 0 56px;
            background: linear-gradient(180deg, #fff 0%, var(--bg-page) 100%);
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 48px;
            align-items: center;
        }

        .hero-content h1 {
            font-size: 34px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 16px 0;
            letter-spacing: -0.02em;
            line-height: 1.35;
        }

        .hero-content .hero-desc {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin: 0 0 24px 0;
            max-width: 560px;
        }

        .hero-cta-group {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 28px;
        }

        .hero-metrics {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            padding-top: 20px;
            border-top: 1px solid var(--border-color);
        }

        .hero-metric {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13.5px;
            color: var(--text-secondary);
            background: var(--bg-card);
            border-radius: 20px;
            padding: 6px 14px;
            border: 1px solid var(--border-color);
            transition: all var(--transition-base);
        }

        .hero-metric i {
            color: var(--primary);
            font-size: 14px;
        }

        .hero-metric strong {
            color: var(--primary);
            font-weight: 700;
            font-size: 15px;
        }

        .hero-visual {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            min-height: 340px;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            display: flex;
            align-items: flex-end;
            justify-content: flex-start;
        }

        .hero-visual .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(26,43,60,0.05) 0%, rgba(26,43,60,0.55) 100%);
            pointer-events: none;
        }

        .hero-visual-content {
            position: relative;
            z-index: 2;
            padding: 28px;
            color: #fff;
        }

        .hero-visual-content h3 {
            font-size: 18px;
            font-weight: 700;
            margin: 0 0 8px 0;
            color: #fff;
        }

        .hero-visual-content p {
            font-size: 13.5px;
            margin: 0;
            color: rgba(255, 255, 255, 0.9);
            line-height: 1.6;
        }

        /* ===== Metrics Board ===== */
        .metrics-section {
            padding: 0 0 48px;
        }

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

        .metric-card {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            padding: 24px 22px;
            transition: all var(--transition-base);
            text-align: left;
        }

        .metric-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: var(--primary-light);
            transform: translateY(-2px);
        }

        .metric-card .metric-number {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            margin: 0 0 6px 0;
            letter-spacing: -0.02em;
            line-height: 1.2;
        }

        .metric-card .metric-label {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0;
            font-weight: 500;
        }

        .metric-card .metric-trend {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 8px;
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .metric-card .metric-trend i {
            color: #2e8b57;
        }

        /* ===== Service Matrix ===== */
        .services-section {
            background: var(--bg-card-soft);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .service-card {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            padding: var(--card-padding);
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .service-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: var(--primary-light);
            transform: translateY(-2px);
        }

        .service-card.featured {
            grid-column: span 1;
            border-left: 3px solid var(--primary);
        }

        .service-card .service-icon {
            width: 46px;
            height: 46px;
            background: var(--primary-light);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
            color: var(--primary);
            font-size: 20px;
            transition: all var(--transition-base);
        }

        .service-card:hover .service-icon {
            background: var(--primary);
            color: #fff;
        }

        .service-card h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 8px 0;
        }

        .service-card p {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0 0 12px 0;
            line-height: 1.6;
        }

        .service-card .service-link {
            font-size: 13.5px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 5px;
            transition: all var(--transition-base);
        }

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

        .service-card.wide {
            grid-column: span 2;
            display: grid;
            grid-template-columns: 1fr auto;
            gap: 20px;
            align-items: center;
        }

        .service-card.wide .service-info {
            flex: 1;
        }

        .service-card .service-img {
            width: 120px;
            height: 90px;
            border-radius: 8px;
            object-fit: cover;
            box-shadow: 0 2px 8px rgba(26, 43, 60, 0.08);
        }

        /* ===== Comparison Section ===== */
        .comparison-section {
            padding: 48px 0;
        }

        .comparison-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr 1fr;
            gap: 0;
            background: var(--bg-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            overflow: hidden;
        }

        .comparison-col {
            padding: 28px 24px;
            border-right: 1px solid var(--border-color);
        }

        .comparison-col:last-child {
            border-right: none;
        }

        .comparison-col.header-col {
            background: var(--primary-faint);
        }

        .comparison-col.recommended {
            background: var(--primary-light);
            position: relative;
            border-right: 1px solid var(--primary-light);
        }

        .comparison-col.recommended::before {
            content: '推荐方案';
            position: absolute;
            top: 18px;
            right: 18px;
            background: var(--primary);
            color: #fff;
            font-size: 11px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 12px;
            letter-spacing: 0.02em;
        }

        .comparison-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 14px 0;
        }

        .comparison-col .compare-item {
            font-size: 13.5px;
            color: var(--text-secondary);
            padding: 8px 0;
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .comparison-col .compare-item:last-child {
            border-bottom: none;
        }

        .comparison-col .compare-item i {
            color: var(--primary);
            font-size: 13px;
            flex-shrink: 0;
        }

        .comparison-col .compare-item i.fa-xmark {
            color: #c0392b;
        }

        /* ===== News Section ===== */
        .news-section {
            background: var(--bg-card-soft);
            border-top: 1px solid var(--border-color);
        }

        .news-layout {
            display: grid;
            grid-template-columns: 1.4fr 0.6fr;
            gap: 32px;
        }

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

        .news-item {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--border-color);
            box-shadow: 0 2px 8px rgba(26, 43, 60, 0.04);
            padding: 18px 20px;
            display: flex;
            gap: 16px;
            align-items: flex-start;
            transition: all var(--transition-base);
        }

        .news-item:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: var(--primary-light);
            transform: translateY(-1px);
        }

        .news-item .news-date {
            flex-shrink: 0;
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 4px 10px;
            border-radius: 6px;
            min-width: 54px;
            text-align: center;
            letter-spacing: 0.02em;
        }

        .news-item .news-content h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 5px 0;
        }

        .news-item .news-content p {
            font-size: 13.5px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.6;
        }

        .news-sidebar {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .news-sidebar .panel {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--border-color);
            padding: 20px;
            box-shadow: 0 2px 8px rgba(26, 43, 60, 0.04);
        }

        .news-sidebar .panel h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 12px 0;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border-color);
        }

        .news-sidebar .panel ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .news-sidebar .panel ul li {
            font-size: 13.5px;
            color: var(--text-secondary);
            padding: 8px 0;
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .news-sidebar .panel ul li:last-child {
            border-bottom: none;
        }

        .news-sidebar .panel ul li i {
            color: var(--primary);
            font-size: 12px;
            flex-shrink: 0;
        }

        /* ===== Reviews Section ===== */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .review-card {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--border-color);
            box-shadow: 0 2px 8px rgba(26, 43, 60, 0.04);
            padding: 22px 20px;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .review-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: var(--primary-light);
            transform: translateY(-2px);
        }

        .review-card .review-stars {
            display: flex;
            gap: 3px;
            color: #e67e22;
            font-size: 13px;
        }

        .review-card .review-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
            flex: 1;
        }

        .review-card .review-author {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .review-card .review-author .avatar {
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            font-weight: 700;
            flex-shrink: 0;
        }

        /* ===== Partners Section ===== */
        .partners-section {
            background: var(--bg-card-soft);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .partners-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 8px;
        }

        .partner-tag {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 20px;
            padding: 8px 18px;
            font-size: 13.5px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 7px;
        }

        .partner-tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            box-shadow: 0 2px 8px rgba(26, 95, 170, 0.08);
            transform: translateY(-1px);
        }

        .partner-tag i {
            color: var(--primary);
            font-size: 13px;
        }

        /* ===== Brand Intro ===== */
        .brand-intro-section {
            padding: 48px 0;
        }

        .brand-intro-card {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            padding: 32px 36px;
            display: grid;
            grid-template-columns: 1fr auto;
            gap: 32px;
            align-items: center;
        }

        .brand-intro-card .brand-text h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 12px 0;
        }

        .brand-intro-card .brand-text p {
            font-size: 14.5px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin: 0 0 12px 0;
        }

        .brand-intro-card .brand-text p:last-child {
            margin-bottom: 0;
        }

        .brand-intro-card .brand-img {
            width: 180px;
            height: 140px;
            border-radius: 10px;
            object-fit: cover;
            box-shadow: 0 4px 16px rgba(26, 43, 60, 0.08);
            flex-shrink: 0;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-card-soft);
            border-top: 1px solid var(--border-color);
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--border-color);
            box-shadow: 0 2px 8px rgba(26, 43, 60, 0.04);
            transition: all var(--transition-base);
            overflow: hidden;
        }

        .faq-item:hover {
            box-shadow: var(--shadow-card-hover);
        }

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

        .faq-item .faq-question {
            padding: 18px 22px;
            display: flex;
            align-items: center;
            gap: 14px;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            transition: all var(--transition-base);
            user-select: none;
            width: 100%;
            background: none;
            border: none;
            text-align: left;
        }

        .faq-item .faq-question .faq-icon {
            flex-shrink: 0;
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 14px;
            transition: all var(--transition-base);
        }

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

        .faq-item .faq-question .faq-arrow {
            margin-left: auto;
            transition: transform var(--transition-base);
            color: var(--text-muted);
            font-size: 13px;
            flex-shrink: 0;
        }

        .faq-item.active .faq-question .faq-arrow {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .faq-item .faq-answer {
            padding: 0 22px 20px 68px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            display: none;
        }

        .faq-item.active .faq-answer {
            display: block;
            animation: faqFadeIn 0.3s ease;
        }

        @keyframes faqFadeIn {
            from {
                opacity: 0;
                transform: translateY(-6px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* ===== CTA Form ===== */
        .cta-section {
            padding: 48px 0 72px;
        }

        .cta-card {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card-hover);
            padding: 36px;
            display: grid;
            grid-template-columns: 0.9fr 1.1fr;
            gap: 36px;
            align-items: center;
            position: relative;
            overflow: hidden;
        }

        .cta-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: var(--primary);
        }

        .cta-card .cta-info h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 12px 0;
        }

        .cta-card .cta-info p {
            font-size: 14.5px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0 0 16px 0;
        }

        .cta-card .cta-info .cta-benefits {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .cta-card .cta-info .cta-benefits li {
            font-size: 13.5px;
            color: var(--text-secondary);
            padding: 5px 0;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .cta-card .cta-info .cta-benefits li i {
            color: var(--primary);
            font-size: 13px;
            flex-shrink: 0;
        }

        .form-group {
            margin-bottom: 16px;
        }

        .form-group label {
            display: block;
            font-size: 13.5px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 5px;
        }

        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 11px 14px;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-btn);
            font-size: 14px;
            color: var(--text-primary);
            background: #fff;
            transition: all var(--transition-base);
            outline: none;
        }

        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px var(--border-focus);
        }

        .form-group textarea {
            resize: vertical;
            min-height: 90px;
        }

        .form-submit {
            margin-top: 20px;
        }

        .form-submit .btn-primary {
            width: 100%;
            justify-content: center;
            padding: 13px 24px;
            font-size: 15px;
        }

        .form-privacy {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 12px;
            text-align: center;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #1A2B3C;
            color: rgba(255, 255, 255, 0.85);
            padding: 48px 0 28px;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr 0.8fr 0.8fr;
            gap: 36px;
            margin-bottom: 32px;
        }

        .footer-brand .footer-logo {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-brand .footer-logo span {
            background: var(--primary);
            width: 32px;
            height: 32px;
            border-radius: 8px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            color: #fff;
            flex-shrink: 0;
        }

        .footer-brand p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.7;
            margin: 0 0 16px 0;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 14px 0;
            letter-spacing: 0.01em;
        }

        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .footer-col ul li {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
            padding: 5px 0;
        }

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

        .footer-col ul li 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-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 12.5px;
            color: rgba(255, 255, 255, 0.65);
        }

        .footer-bottom .footer-legal {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.65);
            text-decoration: none;
            transition: color var(--transition-base);
        }

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

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .hero-content h1 {
                font-size: 30px;
            }

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

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

            .service-card.wide {
                grid-column: span 2;
            }

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

            .comparison-col {
                border-right: none;
                border-bottom: 1px solid var(--border-color);
            }

            .comparison-col:last-child {
                border-bottom: none;
            }

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

            .news-layout {
                grid-template-columns: 1fr;
            }

            .brand-intro-card {
                grid-template-columns: 1fr;
            }

            .cta-card {
                grid-template-columns: 1fr;
            }

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

            .nav-links {
                display: none;
            }

            .nav-toggle {
                display: block;
            }

            .nav-cta {
                display: none;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: 48px;
                --card-padding: 18px;
            }

            .section-heading h2 {
                font-size: 22px;
            }

            .hero-content h1 {
                font-size: 26px;
                line-height: 1.4;
            }

            .hero-content .hero-desc {
                font-size: 15px;
            }

            .metrics-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .metric-card .metric-number {
                font-size: 26px;
            }

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

            .service-card.wide {
                grid-column: span 1;
                grid-template-columns: 1fr;
            }

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

            .brand-intro-card {
                padding: 22px;
            }

            .cta-card {
                padding: 24px;
            }

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

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }

            .nav-panel {
                padding: 6px 12px;
            }

            .nav-brand .brand-text {
                font-size: 16px;
            }

            .hero-visual {
                min-height: 220px;
            }
        }

        @media (max-width: 480px) {
            .container {
                padding-left: 14px;
                padding-right: 14px;
            }

            .hero-section {
                padding: 28px 0 36px;
            }

            .hero-content h1 {
                font-size: 22px;
            }

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

            .hero-cta-group .btn-primary,
            .hero-cta-group .btn-outline {
                width: 100%;
                justify-content: center;
            }

            .hero-metrics {
                flex-direction: column;
                gap: 8px;
            }

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

            .metric-card {
                padding: 16px;
            }

            .comparison-col {
                padding: 18px 16px;
            }

            .news-item {
                flex-direction: column;
                gap: 8px;
                padding: 14px 16px;
            }

            .faq-item .faq-question {
                padding: 14px 16px;
                font-size: 14px;
                gap: 10px;
            }

            .faq-item .faq-answer {
                padding: 0 16px 16px 58px;
                font-size: 13.5px;
            }

            .cta-card {
                padding: 20px;
            }

            .brand-intro-card .brand-img {
                width: 100%;
                height: auto;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #1A5FAA;
            --primary-hover: #164d8a;
            --primary-light: #E6F0FA;
            --primary-faint: #E9F0F7;
            --bg-page: #F5F8FC;
            --bg-card: #FFFFFF;
            --bg-card-soft: #FBFDFF;
            --text-primary: #1A2B3C;
            --text-secondary: #52687A;
            --text-muted: #7A8FA3;
            --border-color: #DCE6F0;
            --border-focus: rgba(26, 95, 170, 0.45);
            --radius-card: 10px;
            --radius-btn: 8px;
            --radius-nav: 14px;
            --radius-sm: 6px;
            --shadow-card: 0 4px 16px rgba(26, 43, 60, 0.06);
            --shadow-card-hover: 0 8px 24px rgba(26, 95, 170, 0.12);
            --shadow-nav: 0 2px 12px rgba(26, 43, 60, 0.05);
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            --section-gap: 80px;
            --section-gap-mobile: 48px;
            --card-padding: 28px;
            --card-padding-mobile: 18px;
            --max-width: 1200px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-stack);
            font-size: 15px;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--bg-page);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition-base), text-decoration var(--transition-base);
        }
        a:hover {
            color: var(--primary-hover);
            text-decoration: underline;
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        .section-gap {
            padding-top: var(--section-gap);
            padding-bottom: var(--section-gap);
        }
        .section-gap-sm {
            padding-top: 48px;
            padding-bottom: 48px;
        }
        .section-heading {
            margin-bottom: 32px;
        }
        .section-heading h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 10px 0;
            letter-spacing: -0.01em;
        }
        .section-heading p {
            font-size: 16px;
            color: var(--text-secondary);
            margin: 0;
            max-width: 720px;
        }
        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 4px 14px;
            border-radius: 20px;
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            padding: 16px 0 12px;
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--bg-page);
        }
        .nav-panel {
            background: var(--bg-card);
            border-radius: var(--radius-nav);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-nav);
            padding: 8px 16px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: nowrap;
            transition: box-shadow var(--transition-base);
        }
        .nav-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .nav-brand .brand-icon {
            width: 38px;
            height: 38px;
            background: var(--primary);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            letter-spacing: -0.01em;
        }
        .nav-brand .brand-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
            justify-content: center;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: thin;
            -webkit-overflow-scrolling: touch;
            padding: 2px 4px;
        }
        .nav-links::-webkit-scrollbar {
            height: 4px;
        }
        .nav-links::-webkit-scrollbar-thumb {
            background: var(--border-color);
            border-radius: 4px;
        }
        .nav-card-link {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 8px 14px;
            border-radius: 8px;
            font-size: 13.5px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            border: 1px solid transparent;
            transition: all var(--transition-base);
        }
        .nav-card-link:hover {
            background: var(--primary-faint);
            color: var(--primary);
            text-decoration: none;
            box-shadow: 0 2px 8px rgba(26, 95, 170, 0.08);
        }
        .nav-card-link.active {
            background: var(--primary-light);
            color: var(--primary);
            border-color: var(--primary);
            font-weight: 600;
        }
        .nav-card-link i {
            font-size: 14px;
            width: 16px;
            text-align: center;
        }
        .nav-cta {
            flex-shrink: 0;
        }
        .nav-cta .btn-primary {
            white-space: nowrap;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            color: var(--text-primary);
            font-size: 18px;
            flex-shrink: 0;
            transition: all var(--transition-base);
        }
        .nav-toggle:hover {
            background: var(--primary-faint);
            border-color: var(--primary);
            color: var(--primary);
        }
        .nav-toggle[aria-expanded="true"] {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary);
        }

        /* ===== Buttons ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            padding: 10px 22px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all var(--transition-base);
            text-decoration: none;
            line-height: 1.5;
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            color: #fff;
            text-decoration: none;
            box-shadow: 0 4px 12px rgba(26, 95, 170, 0.25);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 6px rgba(26, 95, 170, 0.18);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            color: var(--primary);
            padding: 10px 22px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            border: 1px solid var(--primary);
            cursor: pointer;
            transition: all var(--transition-base);
            text-decoration: none;
            line-height: 1.5;
        }
        .btn-secondary:hover {
            background: var(--primary-light);
            color: var(--primary);
            text-decoration: none;
            border-color: var(--primary);
        }
        .btn-secondary:active {
            transform: translateY(1px);
        }
        .btn-large {
            padding: 14px 32px;
            font-size: 16px;
            border-radius: 10px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #1A2B3C;
            color: #fff;
            padding: 56px 0 28px;
            margin-top: 40px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 32px;
            margin-bottom: 40px;
        }
        .footer-brand p {
            font-size: 14px;
            color: #B8C7D6;
            line-height: 1.7;
            margin-top: 14px;
            max-width: 320px;
        }
        .footer-logo {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: -0.01em;
        }
        .footer-logo span {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--primary);
            border-radius: 9px;
            font-size: 16px;
            font-weight: 700;
            color: #fff;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.01em;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            color: #B8C7D6;
            font-size: 13.5px;
            text-decoration: none;
            transition: color var(--transition-base);
        }
        .footer-col ul li a:hover {
            color: #fff;
            text-decoration: none;
        }
        .footer-col ul li:not(:has(a)) {
            color: #B8C7D6;
            font-size: 13.5px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            justify-content: space-between;
        }
        .footer-legal {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            font-size: 12.5px;
            color: #8FA3B8;
        }
        .footer-legal a {
            color: #8FA3B8;
            text-decoration: none;
            transition: color var(--transition-base);
        }
        .footer-legal a:hover {
            color: #fff;
            text-decoration: none;
        }

        /* ===== Category Page 1 Specific Styles ===== */
        /* Hero with large image */
        .cat-hero {
            padding: 56px 0 64px;
            position: relative;
            overflow: hidden;
        }
        .cat-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, var(--primary-faint) 0%, var(--bg-page) 40%, #fff 100%);
            z-index: 0;
        }
        .cat-hero .container {
            position: relative;
            z-index: 1;
        }
        .cat-hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .cat-hero-content h1 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 16px 0;
            letter-spacing: -0.015em;
            line-height: 1.3;
        }
        .cat-hero-content .hero-subtitle {
            font-size: 16.5px;
            color: var(--text-secondary);
            margin: 0 0 24px 0;
            line-height: 1.75;
            max-width: 480px;
        }
        .hero-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 28px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: 20px;
            padding: 6px 14px;
            font-size: 12.5px;
            font-weight: 500;
            color: var(--text-secondary);
            box-shadow: var(--shadow-card);
        }
        .hero-badge i {
            color: var(--primary);
            font-size: 13px;
        }
        .cat-hero-image {
            position: relative;
        }
        .cat-hero-image img {
            border-radius: 14px;
            box-shadow: 0 12px 40px rgba(26, 43, 60, 0.15);
            width: 100%;
            height: auto;
            object-fit: cover;
            aspect-ratio: 16/10;
        }
        .cat-hero-image::after {
            content: '';
            position: absolute;
            top: 12px;
            left: 12px;
            right: -12px;
            bottom: -12px;
            border: 2px solid var(--primary);
            border-radius: 14px;
            z-index: -1;
            opacity: 0.15;
        }

        /* Function cards grid */
        .function-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .function-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-card);
            padding: var(--card-padding);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .function-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(26, 95, 170, 0.3);
            transform: translateY(-2px);
        }
        .function-icon {
            width: 48px;
            height: 48px;
            background: var(--primary-light);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--primary);
            flex-shrink: 0;
        }
        .function-card h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0;
            letter-spacing: -0.005em;
        }
        .function-card p {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.7;
            flex: 1;
        }
        .function-card .func-link {
            font-size: 13.5px;
            font-weight: 500;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            text-decoration: none;
            transition: all var(--transition-base);
        }
        .function-card .func-link:hover {
            color: var(--primary-hover);
            text-decoration: underline;
        }
        .function-card .func-link i {
            font-size: 12px;
            transition: transform var(--transition-base);
        }
        .function-card .func-link:hover i {
            transform: translateX(3px);
        }

        /* Steps section */
        .steps-section {
            background: #fff;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }
        .steps-list {
            display: flex;
            flex-direction: column;
            gap: 24px;
            max-width: 780px;
        }
        .step-item {
            display: flex;
            gap: 20px;
            background: var(--bg-card-soft);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-card);
            padding: 22px 26px;
            transition: all var(--transition-base);
        }
        .step-item:hover {
            box-shadow: var(--shadow-card);
            border-color: rgba(26, 95, 170, 0.25);
        }
        .step-num {
            width: 44px;
            height: 44px;
            min-width: 44px;
            background: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            flex-shrink: 0;
        }
        .step-content h3 {
            font-size: 16.5px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 8px 0;
        }
        .step-content p {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.7;
        }
        .step-content .step-meta {
            display: flex;
            gap: 12px;
            margin-top: 10px;
            flex-wrap: wrap;
        }
        .step-meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 12px;
            color: var(--text-muted);
            background: var(--primary-faint);
            padding: 3px 10px;
            border-radius: 12px;
        }
        .step-meta span i {
            color: var(--primary);
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: all var(--transition-base);
            box-shadow: var(--shadow-card);
        }
        .faq-item.open {
            border-color: var(--primary);
            box-shadow: 0 6px 20px rgba(26, 95, 170, 0.1);
        }
        .faq-question {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 16px 22px;
            cursor: pointer;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            font-size: 15.5px;
            font-weight: 600;
            color: var(--text-primary);
            transition: color var(--transition-base);
            position: relative;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question .faq-q-icon {
            width: 28px;
            height: 28px;
            min-width: 28px;
            background: var(--primary-light);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 13px;
            font-weight: 700;
        }
        .faq-question .faq-arrow {
            margin-left: auto;
            color: var(--text-muted);
            transition: transform var(--transition-base);
            font-size: 14px;
            flex-shrink: 0;
        }
        .faq-item.open .faq-arrow {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .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 18px;
        }
        .faq-answer p {
            font-size: 14.5px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.75;
        }

        /* CTA section */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, #1a4d8a 100%);
            border-radius: var(--radius-card);
            padding: 48px 40px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -40px;
            width: 140px;
            height: 140px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-section h2 {
            font-size: 24px;
            font-weight: 700;
            margin: 0 0 12px 0;
            color: #fff;
            position: relative;
            z-index: 1;
        }
        .cta-section p {
            font-size: 15.5px;
            color: rgba(255, 255, 255, 0.85);
            margin: 0 0 24px 0;
            max-width: 540px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.7;
            position: relative;
            z-index: 1;
        }
        .cta-section .btn-white {
            background: #fff;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 30px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all var(--transition-base);
            text-decoration: none;
            position: relative;
            z-index: 1;
        }
        .cta-section .btn-white:hover {
            background: var(--primary-light);
            color: var(--primary);
            text-decoration: none;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
            transform: translateY(-1px);
        }
        .cta-section .btn-white:active {
            transform: translateY(0);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            :root {
                --section-gap: 56px;
            }
            .cat-hero-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .cat-hero-content {
                text-align: center;
            }
            .cat-hero-content .hero-subtitle {
                margin-left: auto;
                margin-right: auto;
                max-width: 560px;
            }
            .hero-badges {
                justify-content: center;
            }
            .function-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: 48px;
                --card-padding: 18px;
            }
            .nav-panel {
                flex-wrap: wrap;
                padding: 8px 12px;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                align-items: stretch;
                width: 100%;
                order: 3;
                gap: 4px;
                overflow: visible;
                padding: 8px 0;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-card-link {
                width: 100%;
                padding: 10px 14px;
            }
            .nav-cta {
                margin-left: auto;
            }
            .nav-toggle {
                display: flex;
            }
            .cat-hero {
                padding: 40px 0 48px;
            }
            .cat-hero-content h1 {
                font-size: 26px;
            }
            .cat-hero-content .hero-subtitle {
                font-size: 15px;
            }
            .function-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .step-item {
                flex-direction: column;
                gap: 14px;
                padding: 18px 20px;
            }
            .step-num {
                width: 38px;
                height: 38px;
                min-width: 38px;
                font-size: 16px;
            }
            .cta-section {
                padding: 36px 22px;
            }
            .cta-section h2 {
                font-size: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 10px;
                align-items: flex-start;
            }
        }

        @media (max-width: 520px) {
            :root {
                --section-gap: 40px;
                --card-padding: 16px;
            }
            .cat-hero-content h1 {
                font-size: 24px;
            }
            .hero-badges {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-badge {
                justify-content: center;
            }
            .cta-section h2 {
                font-size: 18px;
            }
            .faq-question {
                font-size: 14px;
                padding: 14px 16px;
            }
            .faq-answer {
                padding: 0 16px;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 14px;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #1A5FAA;
            --primary-hover: #164d8a;
            --primary-light: #E6F0FA;
            --primary-faint: #E9F0F7;
            --bg-page: #F5F8FC;
            --bg-card: #FFFFFF;
            --bg-card-soft: #FBFDFF;
            --text-primary: #1A2B3C;
            --text-secondary: #52687A;
            --text-muted: #7A8FA3;
            --border-color: #DCE6F0;
            --border-focus: rgba(26, 95, 170, 0.45);
            --radius-card: 10px;
            --radius-btn: 8px;
            --radius-nav: 14px;
            --radius-sm: 6px;
            --shadow-card: 0 4px 16px rgba(26, 43, 60, 0.06);
            --shadow-card-hover: 0 8px 24px rgba(26, 95, 170, 0.12);
            --shadow-nav: 0 2px 12px rgba(26, 43, 60, 0.05);
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            --section-gap: 72px;
            --section-gap-mobile: 44px;
            --card-padding: 26px;
            --card-padding-mobile: 18px;
            --max-width: 1200px;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-stack);
            font-size: 15px;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--bg-page);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition-base), text-decoration var(--transition-base);
        }
        a:hover {
            color: var(--primary-hover);
            text-decoration: underline;
        }
        button, input, textarea, select {
            font-family: inherit;
            font-size: inherit;
        }
        button:focus-visible, a:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        .section-gap {
            padding-top: var(--section-gap);
            padding-bottom: var(--section-gap);
        }
        .section-gap-sm {
            padding-top: 44px;
            padding-bottom: 44px;
        }
        .section-heading {
            margin-bottom: 28px;
        }
        .section-heading h2 {
            font-size: 25px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 8px 0;
            letter-spacing: -0.01em;
        }
        .section-heading p {
            font-size: 15px;
            color: var(--text-secondary);
            margin: 0;
            max-width: 700px;
            line-height: 1.7;
        }
        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 4px 14px;
            border-radius: 20px;
            margin-bottom: 10px;
            letter-spacing: 0.02em;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            padding: 16px 0 10px;
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--bg-page);
        }
        .nav-panel {
            background: var(--bg-card);
            border-radius: var(--radius-nav);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-nav);
            padding: 8px 16px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: nowrap;
            transition: box-shadow var(--transition-base);
        }
        .nav-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .nav-brand .brand-icon {
            width: 38px;
            height: 38px;
            background: var(--primary);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            letter-spacing: -0.01em;
        }
        .nav-brand .brand-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
            justify-content: center;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: thin;
            -webkit-overflow-scrolling: touch;
            padding: 2px 4px;
        }
        .nav-links::-webkit-scrollbar {
            height: 4px;
        }
        .nav-links::-webkit-scrollbar-thumb {
            background: var(--border-color);
            border-radius: 4px;
        }
        .nav-card-link {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 8px 14px;
            border-radius: 8px;
            font-size: 13.5px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            border: 1px solid transparent;
            background: transparent;
            transition: all var(--transition-base);
        }
        .nav-card-link i {
            font-size: 14px;
            color: var(--text-muted);
            transition: color var(--transition-base);
        }
        .nav-card-link:hover {
            color: var(--primary);
            text-decoration: none;
            background: var(--primary-light);
            border-color: var(--border-color);
            box-shadow: 0 2px 8px rgba(26, 95, 170, 0.08);
        }
        .nav-card-link:hover i {
            color: var(--primary);
        }
        .nav-card-link.active {
            color: var(--primary);
            background: var(--primary-light);
            border-color: var(--primary);
            font-weight: 600;
        }
        .nav-card-link.active i {
            color: var(--primary);
        }
        .nav-cta {
            flex-shrink: 0;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all var(--transition-base);
            white-space: nowrap;
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            color: #fff;
            text-decoration: none;
            box-shadow: 0 4px 14px rgba(26, 95, 170, 0.25);
        }
        .btn-primary:active {
            transform: translateY(1px);
        }
        .btn-primary:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            box-shadow: 0 0 0 4px var(--border-focus);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            color: var(--primary);
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            border: 1px solid var(--primary);
            cursor: pointer;
            transition: all var(--transition-base);
            white-space: nowrap;
        }
        .btn-secondary:hover {
            background: var(--primary-light);
            color: var(--primary-hover);
            text-decoration: none;
            border-color: var(--primary-hover);
        }
        .nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            color: var(--text-primary);
            font-size: 18px;
            padding: 8px 12px;
            cursor: pointer;
            transition: all var(--transition-base);
        }
        .nav-toggle:hover {
            background: var(--primary-light);
            color: var(--primary);
            border-color: var(--primary);
        }
        .nav-toggle:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        /* ===== Hero ===== */
        .hero-scenarios {
            padding: 48px 0 52px;
            background: linear-gradient(180deg, var(--primary-faint) 0%, var(--bg-page) 100%);
            border-bottom: 1px solid var(--border-color);
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 40px;
            align-items: center;
        }
        .hero-badge {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 5px 16px;
            border-radius: 20px;
            margin-bottom: 14px;
        }
        .hero-scenarios h1 {
            font-size: 34px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 14px 0;
            line-height: 1.3;
            letter-spacing: -0.01em;
        }
        .hero-scenarios .hero-sub {
            font-size: 17px;
            color: var(--text-secondary);
            margin: 0 0 22px 0;
            line-height: 1.7;
            max-width: 580px;
        }
        .hero-metrics {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-top: 20px;
        }
        .hero-metric {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 14px 20px;
            text-align: center;
            min-width: 110px;
            flex: 1;
            max-width: 160px;
        }
        .hero-metric .metric-num {
            font-size: 22px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
        }
        .hero-metric .metric-label {
            font-size: 12px;
            color: var(--text-secondary);
            margin-top: 4px;
        }
        .hero-image-wrap {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card-hover);
            border: 1px solid var(--border-color);
            position: relative;
        }
        .hero-image-wrap img {
            width: 100%;
            height: 340px;
            object-fit: cover;
        }
        .hero-image-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: linear-gradient(0deg, rgba(26,43,60,0.85) 0%, rgba(26,43,60,0.3) 70%, transparent 100%);
            padding: 60px 24px 18px;
            color: #fff;
        }
        .hero-image-overlay span {
            font-size: 13px;
            font-weight: 500;
            color: rgba(255,255,255,0.9);
        }

        /* ===== Sidebar Layout ===== */
        .layout-grid {
            display: grid;
            grid-template-columns: 260px 1fr 280px;
            gap: 28px;
            align-items: start;
        }
        .sidebar-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 22px;
            margin-bottom: 22px;
            transition: box-shadow var(--transition-base);
        }
        .sidebar-card:hover {
            box-shadow: var(--shadow-card-hover);
        }
        .sidebar-card h3 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 12px 0;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i {
            color: var(--primary);
            font-size: 16px;
        }
        .sidebar-card ul {
            margin: 0;
            padding: 0;
            list-style: none;
        }
        .sidebar-card ul li {
            margin-bottom: 6px;
        }
        .sidebar-card ul li:last-child {
            margin-bottom: 0;
        }
        .sidebar-card ul a {
            display: block;
            padding: 8px 12px;
            border-radius: 6px;
            font-size: 13.5px;
            color: var(--text-secondary);
            transition: all var(--transition-base);
        }
        .sidebar-card ul a:hover {
            background: var(--primary-light);
            color: var(--primary);
            text-decoration: none;
        }
        .sidebar-card ul a i {
            margin-right: 8px;
            font-size: 12px;
            color: var(--text-muted);
        }
        .sidebar-toc-link.active {
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 600;
        }

        /* ===== Scenario Cards ===== */
        .scenario-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 24px;
            margin-bottom: 20px;
            transition: all var(--transition-base);
        }
        .scenario-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(26, 95, 170, 0.4);
        }
        .scenario-card-header {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            margin-bottom: 14px;
        }
        .scenario-icon {
            width: 48px;
            height: 48px;
            flex-shrink: 0;
            border-radius: var(--radius-sm);
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 22px;
        }
        .scenario-card-header h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 4px 0;
        }
        .scenario-card-header .scenario-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 2px 10px;
            border-radius: 12px;
        }
        .scenario-card p {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0 0 12px 0;
            line-height: 1.7;
        }
        .scenario-card ul {
            margin: 0;
            padding: 0;
            list-style: none;
        }
        .scenario-card ul li {
            font-size: 13.5px;
            color: var(--text-secondary);
            padding: 4px 0;
            padding-left: 20px;
            position: relative;
        }
        .scenario-card ul li::before {
            content: "\f00c";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            position: absolute;
            left: 0;
            top: 4px;
            color: var(--primary);
            font-size: 12px;
        }

        /* ===== Recommended Cards ===== */
        .recommend-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            margin-bottom: 18px;
            transition: all var(--transition-base);
        }
        .recommend-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(26, 95, 170, 0.4);
        }
        .recommend-card img {
            width: 100%;
            height: 140px;
            object-fit: cover;
        }
        .recommend-card .recommend-body {
            padding: 16px 18px;
        }
        .recommend-card .recommend-body h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 6px 0;
        }
        .recommend-card .recommend-body p {
            font-size: 13px;
            color: var(--text-secondary);
            margin: 0 0 10px 0;
            line-height: 1.6;
        }
        .recommend-card .recommend-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* ===== Process Steps ===== */
        .process-section {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 40px 32px;
            margin-top: 20px;
        }
        .process-steps {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
            margin-top: 24px;
        }
        .process-step {
            text-align: center;
        }
        .process-step .step-num {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 17px;
            font-weight: 700;
            margin: 0 auto 10px;
        }
        .process-step .step-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        .process-step .step-desc {
            font-size: 12.5px;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        /* ===== FAQ ===== */
        .faq-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            margin-bottom: 12px;
            transition: all var(--transition-base);
        }
        .faq-card:hover {
            border-color: rgba(26, 95, 170, 0.4);
        }
        .faq-card .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 22px;
            background: transparent;
            border: none;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            text-align: left;
            gap: 12px;
        }
        .faq-card .faq-question span {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .faq-card .faq-question .faq-icon {
            width: 28px;
            height: 28px;
            flex-shrink: 0;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
        }
        .faq-card .faq-question .faq-toggle {
            font-size: 14px;
            color: var(--text-muted);
            transition: transform var(--transition-base);
        }
        .faq-card.is-open .faq-question .faq-toggle {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-card .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 22px;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.7;
        }
        .faq-card.is-open .faq-answer {
            max-height: 300px;
            padding: 0 22px 18px;
        }
        .faq-card.is-open {
            border-color: var(--primary);
            box-shadow: var(--shadow-card-hover);
        }

        /* ===== CTA Form ===== */
        .cta-section {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 40px 36px;
            margin-top: 28px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: center;
        }
        .cta-section .cta-info h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 10px 0;
        }
        .cta-section .cta-info p {
            font-size: 14.5px;
            color: var(--text-secondary);
            margin: 0 0 16px 0;
            line-height: 1.7;
        }
        .cta-section .cta-info ul {
            margin: 0;
            padding: 0;
            list-style: none;
        }
        .cta-section .cta-info ul li {
            font-size: 14px;
            color: var(--text-secondary);
            padding: 5px 0;
            padding-left: 24px;
            position: relative;
        }
        .cta-section .cta-info ul li::before {
            content: "\f058";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            position: absolute;
            left: 0;
            top: 5px;
            color: var(--primary);
            font-size: 13px;
        }
        .form-group {
            margin-bottom: 14px;
        }
        .form-group label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-btn);
            padding: 10px 14px;
            font-size: 14px;
            color: var(--text-primary);
            transition: border-color var(--transition-base), box-shadow var(--transition-base);
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 4px var(--border-focus);
        }
        .form-group textarea {
            resize: vertical;
            min-height: 90px;
        }
        .form-footnote {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 8px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--text-primary);
            color: #fff;
            padding: 52px 0 24px;
            margin-top: 60px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.3fr;
            gap: 36px;
            margin-bottom: 36px;
        }
        .footer-grid h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin: 0 0 14px 0;
        }
        .footer-grid p {
            font-size: 13.5px;
            color: rgba(255,255,255,0.7);
            line-height: 1.7;
            margin-bottom: 12px;
        }
        .footer-logo {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-logo span {
            background: var(--primary);
            border-radius: 6px;
            padding: 4px 8px;
            font-size: 14px;
        }
        .footer-grid ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-grid ul li {
            margin-bottom: 7px;
            font-size: 13.5px;
            color: rgba(255,255,255,0.65);
        }
        .footer-grid ul li a {
            color: rgba(255,255,255,0.65);
            transition: color var(--transition-base);
        }
        .footer-grid ul li a:hover {
            color: #fff;
            text-decoration: none;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.15);
            padding-top: 18px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-legal {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 12.5px;
            color: rgba(255,255,255,0.55);
        }
        .footer-legal a {
            color: rgba(255,255,255,0.55);
        }
        .footer-legal a:hover {
            color: #fff;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .layout-grid {
                grid-template-columns: 1fr;
                gap: 22px;
            }
            .sidebar-card {
                margin-bottom: 0;
            }
            .sidebar-card ul {
                display: flex;
                flex-wrap: wrap;
                gap: 8px;
            }
            .sidebar-card ul li {
                margin-bottom: 0;
            }
            .sidebar-card ul a {
                padding: 6px 14px;
                border: 1px solid var(--border-color);
                font-size: 12.5px;
            }
            .sidebar-card ul a i {
                display: none;
            }
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .hero-image-wrap img {
                height: 260px;
            }
            .process-steps {
                grid-template-columns: repeat(3, 1fr);
                gap: 16px;
            }
            .cta-section {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .nav-card-link {
                padding: 6px 10px;
                font-size: 12.5px;
            }
            .nav-card-link i {
                font-size: 12px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --section-gap: var(--section-gap-mobile);
                --card-padding: var(--card-padding-mobile);
            }
            .site-header {
                padding: 10px 0 6px;
            }
            .nav-panel {
                flex-wrap: wrap;
                padding: 10px 12px;
            }
            .nav-brand .brand-text {
                font-size: 16px;
            }
            .nav-cta {
                margin-left: auto;
            }
            .btn-primary {
                padding: 8px 14px;
                font-size: 12.5px;
            }
            .nav-toggle {
                display: block;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                width: 100%;
                overflow-y: auto;
                max-height: 60vh;
                padding: 8px 0 4px;
            }
            .nav-links.is-open {
                display: flex;
            }
            .nav-card-link {
                padding: 10px 14px;
                font-size: 13.5px;
                border: 1px solid var(--border-color);
                justify-content: flex-start;
            }
            .nav-card-link i {
                font-size: 14px;
            }
            .nav-cta {
                display: none;
            }
            .nav-cta.is-open {
                display: flex;
                width: 100%;
                padding-top: 6px;
            }
            .nav-cta.is-open .btn-primary {
                width: 100%;
                justify-content: center;
            }
            .hero-scenarios {
                padding: 32px 0 36px;
            }
            .hero-scenarios h1 {
                font-size: 26px;
            }
            .hero-scenarios .hero-sub {
                font-size: 15px;
            }
            .hero-metrics {
                gap: 8px;
            }
            .hero-metric {
                min-width: 80px;
                padding: 10px 14px;
                max-width: 120px;
            }
            .hero-metric .metric-num {
                font-size: 18px;
            }
            .hero-metric .metric-label {
                font-size: 11px;
            }
            .hero-image-wrap img {
                height: 200px;
            }
            .layout-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .sidebar-card {
                padding: 16px;
            }
            .sidebar-card ul {
                flex-direction: column;
            }
            .sidebar-card ul a {
                border: none;
                padding: 8px 10px;
                font-size: 13.5px;
            }
            .sidebar-card ul a i {
                display: inline;
                margin-right: 8px;
            }
            .scenario-card {
                padding: 18px;
            }
            .scenario-card-header {
                gap: 12px;
            }
            .scenario-icon {
                width: 40px;
                height: 40px;
                font-size: 18px;
            }
            .scenario-card-header h3 {
                font-size: 15.5px;
            }
            .process-section {
                padding: 24px 18px;
            }
            .process-steps {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .process-step .step-num {
                width: 36px;
                height: 36px;
                font-size: 15px;
            }
            .process-step .step-title {
                font-size: 13px;
            }
            .process-step .step-desc {
                font-size: 11.5px;
            }
            .cta-section {
                padding: 24px 20px;
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .cta-section .cta-info h2 {
                font-size: 19px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
            .footer-legal {
                gap: 10px;
                font-size: 11.5px;
            }
            .faq-card .faq-question {
                padding: 14px 16px;
                font-size: 13.5px;
            }
            .faq-card .faq-answer {
                padding: 0 16px;
                font-size: 13px;
            }
            .faq-card.is-open .faq-answer {
                padding: 0 16px 16px;
            }
        }
        @media (max-width: 480px) {
            .hero-scenarios h1 {
                font-size: 23px;
            }
            .hero-scenarios .hero-sub {
                font-size: 14px;
            }
            .hero-image-wrap img {
                height: 160px;
            }
            .hero-metrics {
                gap: 6px;
            }
            .hero-metric {
                min-width: 70px;
                padding: 8px 10px;
            }
            .hero-metric .metric-num {
                font-size: 16px;
            }
            .hero-metric .metric-label {
                font-size: 10px;
            }
            .process-steps {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .nav-brand .brand-icon {
                width: 32px;
                height: 32px;
                font-size: 15px;
                border-radius: 8px;
            }
            .nav-brand .brand-text {
                font-size: 15px;
            }
            .section-heading h2 {
                font-size: 21px;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #1A5FAA;
            --primary-hover: #164d8a;
            --primary-light: #E6F0FA;
            --primary-faint: #E9F0F7;
            --bg-page: #F5F8FC;
            --bg-card: #FFFFFF;
            --bg-card-soft: #FBFDFF;
            --text-primary: #1A2B3C;
            --text-secondary: #52687A;
            --text-muted: #7A8FA3;
            --border-color: #DCE6F0;
            --border-focus: rgba(26, 95, 170, 0.45);
            --radius-card: 10px;
            --radius-btn: 8px;
            --radius-nav: 14px;
            --radius-sm: 6px;
            --shadow-card: 0 4px 16px rgba(26, 43, 60, 0.06);
            --shadow-card-hover: 0 8px 24px rgba(26, 95, 170, 0.12);
            --shadow-nav: 0 2px 12px rgba(26, 43, 60, 0.05);
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            --section-gap: 64px;
            --section-gap-mobile: 40px;
            --card-padding: 28px;
            --card-padding-mobile: 18px;
            --max-width: 1200px;
        }

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

        body {
            font-family: var(--font-stack);
            font-size: 15px;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--bg-page);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition-base), text-decoration var(--transition-base);
        }

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

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

        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .section-gap {
            padding-top: var(--section-gap);
            padding-bottom: var(--section-gap);
        }

        .section-gap-sm {
            padding-top: 40px;
            padding-bottom: 40px;
        }

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

        .section-heading h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 10px 0;
            letter-spacing: -0.01em;
        }

        .section-heading p {
            font-size: 16px;
            color: var(--text-secondary);
            margin: 0;
            max-width: 720px;
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 4px 14px;
            border-radius: 20px;
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            padding: 16px 0 12px;
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--bg-page);
        }

        .nav-panel {
            background: var(--bg-card);
            border-radius: var(--radius-nav);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-nav);
            padding: 8px 16px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: nowrap;
            transition: box-shadow var(--transition-base);
        }

        .nav-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            color: var(--text-primary);
        }

        .nav-brand:hover {
            text-decoration: none;
            color: var(--text-primary);
        }

        .nav-brand .brand-icon {
            width: 38px;
            height: 38px;
            background: var(--primary);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            letter-spacing: -0.01em;
            flex-shrink: 0;
        }

        .nav-brand .brand-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
            justify-content: center;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: thin;
            -webkit-overflow-scrolling: touch;
            padding: 2px 4px;
        }

        .nav-links::-webkit-scrollbar {
            height: 4px;
        }

        .nav-links::-webkit-scrollbar-thumb {
            background: var(--border-color);
            border-radius: 4px;
        }

        .nav-card-link {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 8px 14px;
            border-radius: 8px;
            font-size: 13.5px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            border: 1px solid transparent;
            transition: all var(--transition-base);
            flex-shrink: 0;
        }

        .nav-card-link i {
            font-size: 13px;
            color: var(--text-muted);
            transition: color var(--transition-base);
        }

        .nav-card-link:hover {
            background: var(--primary-faint);
            color: var(--text-primary);
            text-decoration: none;
            box-shadow: var(--shadow-card);
        }

        .nav-card-link:hover i {
            color: var(--primary);
        }

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

        .nav-card-link.active i {
            color: var(--primary);
        }

        .nav-cta {
            flex-shrink: 0;
        }

        .nav-cta .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
        }

        .nav-toggle {
            display: none;
            background: none;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            color: var(--text-primary);
            cursor: pointer;
            flex-shrink: 0;
            font-size: 17px;
            transition: all var(--transition-base);
        }

        .nav-toggle:hover {
            background: var(--primary-faint);
            border-color: var(--primary);
        }

        /* ===== Buttons ===== */
        .btn-primary {
            display: inline-block;
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all var(--transition-base);
            text-align: center;
            line-height: 1.4;
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            color: #fff;
            text-decoration: none;
            box-shadow: var(--shadow-card-hover);
        }

        .btn-primary:active {
            transform: translateY(1px);
        }

        .btn-secondary {
            display: inline-block;
            background: #fff;
            color: var(--primary);
            border: 1px solid var(--primary);
            padding: 11px 23px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all var(--transition-base);
            text-align: center;
            line-height: 1.4;
        }

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

        .btn-secondary:active {
            transform: translateY(1px);
        }

        /* ===== Hero ===== */
        .page-hero {
            position: relative;
            background: var(--bg-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            margin-top: 8px;
        }

        .page-hero-bg {
            position: absolute;
            top: 0;
            right: 0;
            bottom: 0;
            width: 45%;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.08;
            pointer-events: none;
        }

        .page-hero-content {
            position: relative;
            z-index: 2;
            padding: 48px 44px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 32px;
        }

        .page-hero-text {
            flex: 1;
            min-width: 280px;
        }

        .page-hero-text h1 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 14px 0;
            letter-spacing: -0.01em;
            line-height: 1.3;
        }

        .page-hero-text .hero-desc {
            font-size: 16px;
            color: var(--text-secondary);
            margin: 0 0 24px 0;
            max-width: 560px;
            line-height: 1.8;
        }

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

        .hero-metrics {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-top: 24px;
        }

        .hero-metric-chip {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--bg-card-soft);
            border: 1px solid var(--border-color);
            border-radius: 20px;
            padding: 6px 16px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
        }

        .hero-metric-chip i {
            color: var(--primary);
            font-size: 13px;
        }

        .page-hero-visual {
            flex: 0 0 260px;
            min-width: 200px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .page-hero-visual img {
            width: 100%;
            max-width: 260px;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-color);
        }

        /* ===== Stats / Metric Badges ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .stat-card {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            padding: 22px 20px;
            text-align: center;
            transition: all var(--transition-base);
        }

        .stat-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(26, 95, 170, 0.3);
        }

        .stat-card .stat-number {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 6px;
            letter-spacing: -0.01em;
        }

        .stat-card .stat-label {
            font-size: 13px;
            color: var(--text-secondary);
            font-weight: 500;
        }

        .stat-card .stat-detail {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ===== Comparison Cards ===== */
        .compare-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

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

        .compare-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(26, 95, 170, 0.3);
            transform: translateY(-3px);
        }

        .compare-card.recommended {
            border: 2px solid var(--primary);
            position: relative;
        }

        .compare-card.recommended::before {
            content: '推荐方案';
            position: absolute;
            top: 12px;
            right: 12px;
            background: var(--primary);
            color: #fff;
            font-size: 11px;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 16px;
            z-index: 5;
            letter-spacing: 0.02em;
        }

        .compare-card-header {
            padding: 22px 24px 16px;
            border-bottom: 1px solid var(--border-color);
            text-align: center;
        }

        .compare-card-header h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 6px 0;
        }

        .compare-card-header .compare-sub {
            font-size: 13px;
            color: var(--text-muted);
        }

        .compare-card-body {
            padding: 20px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .compare-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
            padding: 8px 0;
            border-bottom: 1px dashed var(--border-color);
        }

        .compare-item:last-child {
            border-bottom: none;
        }

        .compare-item-label {
            font-size: 13px;
            color: var(--text-secondary);
            white-space: nowrap;
        }

        .compare-item-value {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            text-align: right;
        }

        .compare-item-value.highlight {
            color: var(--primary);
        }

        .compare-card-footer {
            padding: 16px 24px 20px;
            text-align: center;
        }

        .compare-card-footer .btn-primary {
            width: 100%;
            padding: 10px 16px;
            font-size: 14px;
        }

        .compare-card-footer .btn-secondary {
            width: 100%;
            padding: 10px 16px;
            font-size: 14px;
        }

        /* ===== Feature Detail Cards ===== */
        .feature-detail-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }

        .feature-detail-card {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            padding: 24px 22px;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .feature-detail-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(26, 95, 170, 0.3);
        }

        .feature-detail-card .feature-icon {
            width: 42px;
            height: 42px;
            background: var(--primary-light);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 18px;
            flex-shrink: 0;
        }

        .feature-detail-card h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0;
        }

        .feature-detail-card p {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.7;
        }

        /* ===== Steps ===== */
        .steps-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            counter-reset: step-counter;
        }

        .step-item {
            display: flex;
            gap: 20px;
            align-items: flex-start;
            position: relative;
            padding-bottom: 28px;
        }

        .step-item:last-child {
            padding-bottom: 0;
        }

        .step-item::after {
            content: '';
            position: absolute;
            left: 21px;
            top: 48px;
            bottom: 0;
            width: 2px;
            background: var(--border-color);
        }

        .step-item:last-child::after {
            display: none;
        }

        .step-number {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            background: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            z-index: 2;
        }

        .step-content {
            flex: 1;
            background: var(--bg-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            padding: 18px 22px;
        }

        .step-content h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 6px 0;
        }

        .step-content p {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-wrapper {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--border-color);
            margin-bottom: 10px;
            overflow: hidden;
            transition: all var(--transition-base);
            box-shadow: 0 2px 6px rgba(26, 43, 60, 0.03);
        }

        .faq-item:hover {
            border-color: rgba(26, 95, 170, 0.3);
        }

        .faq-item.active {
            border-color: var(--primary);
            box-shadow: var(--shadow-card);
        }

        .faq-question {
            width: 100%;
            background: none;
            border: none;
            text-align: left;
            padding: 18px 20px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: color var(--transition-base);
            line-height: 1.5;
        }

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

        .faq-question .faq-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            flex-shrink: 0;
            transition: transform var(--transition-base);
        }

        .faq-item.active .faq-icon {
            transform: rotate(180deg);
            background: var(--primary);
            color: #fff;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1), padding 0.25s ease;
            padding: 0 20px;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 20px 18px;
        }

        .faq-answer p {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.8;
        }

        /* ===== Form CTA ===== */
        .cta-section {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            overflow: hidden;
        }

        .cta-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0;
        }

        .cta-info {
            padding: 36px 32px;
            background: var(--primary-faint);
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .cta-info h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 12px 0;
        }

        .cta-info p {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0 0 16px 0;
            line-height: 1.8;
        }

        .cta-info ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .cta-info ul li {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-secondary);
        }

        .cta-info ul li i {
            color: var(--primary);
            font-size: 13px;
            flex-shrink: 0;
        }

        .cta-form-wrap {
            padding: 36px 32px;
        }

        .cta-form-wrap .form-group {
            margin-bottom: 16px;
        }

        .cta-form-wrap label {
            display: block;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-primary);
            margin-bottom: 6px;
        }

        .cta-form-wrap input,
        .cta-form-wrap textarea,
        .cta-form-wrap select {
            width: 100%;
            padding: 10px 14px;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-btn);
            font-size: 14px;
            color: var(--text-primary);
            background: #fff;
            transition: all var(--transition-base);
        }

        .cta-form-wrap input:focus,
        .cta-form-wrap textarea:focus,
        .cta-form-wrap select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px var(--border-focus);
        }

        .cta-form-wrap textarea {
            min-height: 100px;
            resize: vertical;
        }

        .cta-form-wrap .btn-primary {
            width: 100%;
            padding: 13px 20px;
            font-size: 15px;
        }

        .form-note {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 10px;
            text-align: center;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--text-primary);
            color: #fff;
            padding: 48px 0 24px;
            margin-top: 48px;
        }

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

        .footer-brand .footer-logo {
            font-size: 20px;
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 12px;
        }

        .footer-brand .footer-logo span {
            background: var(--primary);
            width: 32px;
            height: 32px;
            border-radius: 8px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
        }

        .footer-brand p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.8;
            margin: 0;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin: 0 0 12px 0;
            letter-spacing: 0.02em;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col ul li {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.5;
        }

        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.65);
            transition: color var(--transition-base);
        }

        .footer-col ul li a:hover {
            color: #fff;
            text-decoration: none;
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
        }

        .footer-legal {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-legal a {
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-legal a:hover {
            color: #fff;
            text-decoration: none;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .nav-links {
                justify-content: flex-start;
            }

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

            .compare-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .compare-card.recommended {
                grid-column: span 2;
            }

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

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

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

        @media (max-width: 768px) {
            :root {
                --section-gap: 40px;
                --card-padding: 18px;
            }

            .site-header {
                padding: 10px 0 8px;
            }

            .nav-panel {
                flex-wrap: wrap;
                padding: 8px 12px;
                position: relative;
            }

            .nav-brand .brand-text {
                font-size: 16px;
            }

            .nav-brand .brand-icon {
                width: 32px;
                height: 32px;
                font-size: 15px;
                border-radius: 8px;
            }

            .nav-toggle {
                display: flex;
            }

            .nav-cta {
                display: none;
            }

            .nav-links {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--bg-card);
                border-radius: var(--radius-card);
                border: 1px solid var(--border-color);
                box-shadow: var(--shadow-card);
                padding: 10px;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                margin-top: 8px;
                z-index: 200;
            }

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

            .nav-card-link {
                padding: 12px 14px;
                font-size: 14px;
                border-radius: 8px;
            }

            .page-hero-content {
                padding: 28px 20px;
                flex-direction: column;
                align-items: flex-start;
            }

            .page-hero-visual {
                flex: 0 0 auto;
                width: 100%;
                justify-content: flex-start;
            }

            .page-hero-visual img {
                max-width: 200px;
            }

            .page-hero-text h1 {
                font-size: 24px;
            }

            .hero-metrics {
                gap: 8px;
            }

            .hero-metric-chip {
                font-size: 11px;
                padding: 4px 10px;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }

            .stat-card {
                padding: 16px 12px;
            }

            .stat-card .stat-number {
                font-size: 24px;
            }

            .compare-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }

            .compare-card.recommended {
                grid-column: span 1;
            }

            .feature-detail-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }

            .feature-detail-card {
                padding: 18px 16px;
            }

            .step-item {
                gap: 12px;
                padding-bottom: 20px;
            }

            .step-number {
                width: 36px;
                height: 36px;
                font-size: 14px;
            }

            .step-item::after {
                left: 17px;
                top: 40px;
            }

            .step-content {
                padding: 14px 16px;
            }

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

            .faq-answer p {
                font-size: 13px;
            }

            .cta-info,
            .cta-form-wrap {
                padding: 24px 20px;
            }

            .cta-info h2 {
                font-size: 19px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 480px) {
            .page-hero-text h1 {
                font-size: 21px;
            }

            .page-hero-text .hero-desc {
                font-size: 14px;
            }

            .btn-primary,
            .btn-secondary {
                padding: 10px 18px;
                font-size: 14px;
                width: 100%;
                text-align: center;
            }

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

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }

            .stat-card .stat-number {
                font-size: 20px;
            }

            .stat-card .stat-label {
                font-size: 11px;
            }

            .stat-card .stat-detail {
                font-size: 10px;
            }

            .section-heading h2 {
                font-size: 21px;
            }

            .section-heading p {
                font-size: 14px;
            }

            .compare-card-header h3 {
                font-size: 16px;
            }

            .compare-item-label {
                font-size: 12px;
            }

            .compare-item-value {
                font-size: 13px;
            }
        }

/* roulang page: category4 */
:root {
        --primary: #1A5FAA;
        --primary-hover: #164d8a;
        --primary-light: #E6F0FA;
        --primary-faint: #E9F0F7;
        --bg-page: #F5F8FC;
        --bg-card: #FFFFFF;
        --bg-card-soft: #FBFDFF;
        --text-primary: #1A2B3C;
        --text-secondary: #52687A;
        --text-muted: #7A8FA3;
        --border-color: #DCE6F0;
        --border-focus: rgba(26, 95, 170, 0.45);
        --radius-card: 10px;
        --radius-btn: 8px;
        --radius-nav: 14px;
        --radius-sm: 6px;
        --shadow-card: 0 4px 16px rgba(26, 43, 60, 0.06);
        --shadow-card-hover: 0 8px 24px rgba(26, 95, 170, 0.12);
        --shadow-nav: 0 2px 12px rgba(26, 43, 60, 0.05);
        --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        --section-gap: 48px;
        --section-gap-mobile: 40px;
        --card-padding: 28px;
        --card-padding-mobile: 18px;
        --max-width: 1200px;
    }
    html {
        scroll-behavior: smooth;
        -webkit-text-size-adjust: 100%;
    }
    body {
        font-family: var(--font-stack);
        font-size: 15px;
        line-height: 1.7;
        color: var(--text-primary);
        background-color: var(--bg-page);
        margin: 0;
        padding: 0;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
    img {
        max-width: 100%;
        height: auto;
        display: block;
    }
    a {
        color: var(--primary);
        text-decoration: none;
        transition: color var(--transition-base), text-decoration var(--transition-base);
    }
    a:hover {
        color: var(--primary-hover);
        text-decoration: underline;
    }
    button,
    input,
    textarea,
    select {
        font-family: inherit;
        font-size: inherit;
    }
    button:focus-visible,
    a:focus-visible,
    input:focus-visible,
    textarea:focus-visible,
    select:focus-visible {
        outline: 2px solid var(--primary);
        outline-offset: 2px;
    }
    .container {
        max-width: var(--max-width);
        margin: 0 auto;
        padding-left: 20px;
        padding-right: 20px;
    }
    .section-gap {
        padding-top: var(--section-gap);
        padding-bottom: var(--section-gap);
    }
    .section-gap-sm {
        padding-top: 36px;
        padding-bottom: 36px;
    }
    .section-heading {
        margin-bottom: 32px;
    }
    .section-heading h2 {
        font-size: 26px;
        font-weight: 700;
        color: var(--text-primary);
        margin: 0 0 10px 0;
        letter-spacing: -0.01em;
    }
    .section-heading p {
        font-size: 16px;
        color: var(--text-secondary);
        margin: 0;
        max-width: 760px;
    }
    .section-tag {
        display: inline-block;
        font-size: 13px;
        font-weight: 600;
        color: var(--primary);
        background: var(--primary-light);
        padding: 4px 14px;
        border-radius: 20px;
        margin-bottom: 12px;
        letter-spacing: 0.02em;
    }
    /* Header / Nav */
    .site-header {
        padding: 16px 0 12px;
        position: sticky;
        top: 0;
        z-index: 100;
        background: var(--bg-page);
    }
    .nav-panel {
        background: var(--bg-card);
        border-radius: var(--radius-nav);
        border: 1px solid var(--border-color);
        box-shadow: var(--shadow-nav);
        padding: 8px 16px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 12px;
        flex-wrap: nowrap;
    }
    .nav-brand {
        display: flex;
        align-items: center;
        gap: 10px;
        flex-shrink: 0;
    }
    .nav-brand .brand-icon {
        width: 38px;
        height: 38px;
        background: var(--primary);
        border-radius: 10px;
        display: flex;
        align-items: center;
        justify-content: center;
        color: #fff;
        font-size: 18px;
        font-weight: 700;
        letter-spacing: -0.01em;
    }
    .nav-brand .brand-text {
        font-size: 18px;
        font-weight: 700;
        color: var(--text-primary);
        letter-spacing: -0.01em;
        white-space: nowrap;
    }
    .nav-links {
        display: flex;
        align-items: center;
        gap: 6px;
        flex: 1;
        justify-content: center;
        flex-wrap: nowrap;
        overflow-x: auto;
        scrollbar-width: thin;
        -webkit-overflow-scrolling: touch;
        padding: 2px 4px;
    }
    .nav-links::-webkit-scrollbar {
        height: 4px;
    }
    .nav-links::-webkit-scrollbar-thumb {
        background: var(--border-color);
        border-radius: 4px;
    }
    .nav-card-link {
        display: inline-flex;
        align-items: center;
        gap: 7px;
        padding: 8px 14px;
        border-radius: 8px;
        font-size: 13.5px;
        font-weight: 500;
        color: var(--text-secondary);
        white-space: nowrap;
        border: 1px solid transparent;
        transition: background var(--transition-base), color var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
    }
    .nav-card-link i {
        font-size: 14px;
        color: var(--text-muted);
        transition: color var(--transition-base);
    }
    .nav-card-link:hover {
        background: var(--primary-faint);
        color: var(--text-primary);
        text-decoration: none;
        box-shadow: 0 4px 12px rgba(26,43,60,0.06);
    }
    .nav-card-link:hover i {
        color: var(--primary);
    }
    .nav-card-link.active {
        background: var(--primary-light);
        color: var(--primary);
        border-color: rgba(26,95,170,0.18);
    }
    .nav-card-link.active i {
        color: var(--primary);
    }
    .nav-cta {
        flex-shrink: 0;
    }
    .btn-primary {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        background: var(--primary);
        color: #fff;
        padding: 10px 18px;
        border-radius: var(--radius-btn);
        font-size: 14px;
        font-weight: 600;
        border: 1px solid var(--primary);
        cursor: pointer;
        transition: background var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
        white-space: nowrap;
    }
    .btn-primary:hover {
        background: var(--primary-hover);
        border-color: var(--primary-hover);
        color: #fff;
        text-decoration: none;
        box-shadow: 0 6px 16px rgba(26,95,170,0.18);
    }
    .btn-primary:active {
        transform: translateY(1px);
    }
    .btn-secondary {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        background: #fff;
        color: var(--primary);
        padding: 10px 18px;
        border-radius: var(--radius-btn);
        font-size: 14px;
        font-weight: 600;
        border: 1px solid var(--border-color);
        cursor: pointer;
        transition: background var(--transition-base), border-color var(--transition-base), transform var(--transition-base);
        white-space: nowrap;
    }
    .btn-secondary:hover {
        background: var(--primary-light);
        border-color: rgba(26,95,170,0.35);
        color: var(--primary);
        text-decoration: none;
    }
    .btn-secondary:active {
        transform: translateY(1px);
    }
    .nav-toggle {
        display: none;
        align-items: center;
        justify-content: center;
        width: 42px;
        height: 42px;
        border-radius: 8px;
        background: var(--primary-light);
        color: var(--primary);
        border: 1px solid var(--border-color);
        cursor: pointer;
        transition: background var(--transition-base);
    }
    .nav-toggle:hover {
        background: var(--primary-faint);
    }

    /* Category 4 Layout */
    .security-banner {
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-card);
        overflow: hidden;
        display: flex;
        flex-wrap: wrap;
        align-items: center;
    }
    .security-banner-copy {
        flex: 1 1 52%;
        padding: 40px 32px;
    }
    .security-banner-copy h1 {
        font-size: 32px;
        font-weight: 700;
        color: var(--text-primary);
        margin: 0 0 14px 0;
        letter-spacing: -0.02em;
        line-height: 1.25;
    }
    .security-banner-copy p {
        font-size: 16px;
        color: var(--text-secondary);
        margin: 0 0 20px 0;
        max-width: 620px;
    }
    .banner-actions {
        display: flex;
        gap: 12px;
        flex-wrap: wrap;
    }
    .security-banner-media {
        flex: 1 1 42%;
        min-height: 280px;
        background-color: var(--primary-faint);
        background-image: url('/assets/images/coverpic/cover-6.webp');
        background-size: cover;
        background-position: center;
        position: relative;
    }
    .security-banner-media::after {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(140deg, rgba(26,95,170,0.2), rgba(26,43,60,0.05));
    }
    .banner-badge-row {
        display: flex;
        gap: 16px;
        flex-wrap: wrap;
        margin-top: 24px;
        padding-top: 18px;
        border-top: 1px solid var(--border-color);
    }
    .banner-badge {
        font-size: 13px;
        color: var(--text-secondary);
        display: flex;
        align-items: center;
        gap: 7px;
    }
    .banner-badge i {
        color: var(--primary);
    }

    .card-wall {
        display: grid;
        grid-template-columns: repeat(12, 1fr);
        gap: 18px;
    }
    .card-wall-item {
        background: var(--bg-card-soft);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-card);
        padding: 22px;
        transition: box-shadow var(--transition-base), border-color var(--transition-base);
    }
    .card-wall-item:hover {
        box-shadow: var(--shadow-card-hover);
        border-color: rgba(26,95,170,0.24);
    }
    .card-wall-item.wide-5 {
        grid-column: span 5;
    }
    .card-wall-item.wide-7 {
        grid-column: span 7;
    }
    .card-wall-item.wide-6 {
        grid-column: span 6;
    }
    .card-wall-item.wide-4 {
        grid-column: span 4;
    }
    .card-wall-item.wide-8 {
        grid-column: span 8;
    }
    .card-wall-item.wide-12 {
        grid-column: span 12;
    }
    .card-wall-icon {
        width: 44px;
        height: 44px;
        background: var(--primary-light);
        border-radius: 10px;
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--primary);
        font-size: 20px;
        margin-bottom: 16px;
    }
    .card-wall-title {
        font-size: 17px;
        font-weight: 600;
        color: var(--text-primary);
        margin: 0 0 8px 0;
        line-height: 1.4;
    }
    .card-wall-text {
        font-size: 14px;
        color: var(--text-secondary);
        line-height: 1.75;
        margin: 0;
    }
    .card-wall-list {
        margin: 12px 0 0;
        padding: 0;
        list-style: none;
    }
    .card-wall-list li {
        font-size: 14px;
        color: var(--text-secondary);
        padding: 7px 0;
        border-bottom: 1px dashed var(--border-color);
        display: flex;
        align-items: flex-start;
        gap: 8px;
    }
    .card-wall-list li:last-child {
        border-bottom: 0;
    }
    .card-wall-list i {
        color: var(--primary);
        font-size: 13px;
        margin-top: 4px;
    }

    .metric-strip {
        background: var(--primary);
        border-radius: var(--radius-card);
        box-shadow: 0 8px 24px rgba(26,95,170,0.15);
        padding: 28px 24px;
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
        gap: 20px;
    }
    .metric-strip-item {
        flex: 1 1 150px;
        color: #fff;
    }
    .metric-strip-value {
        font-size: 28px;
        font-weight: 700;
        letter-spacing: -0.01em;
        line-height: 1.2;
    }
    .metric-strip-label {
        font-size: 13px;
        color: rgba(255,255,255,0.78);
        margin-top: 4px;
    }

    .security-split {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 24px;
        align-items: stretch;
    }
    .split-card {
        background: var(--bg-card-soft);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-card);
        padding: 28px;
    }
    .split-card h3 {
        font-size: 20px;
        font-weight: 600;
        color: var(--text-primary);
        margin: 0 0 12px 0;
    }
    .split-card p {
        font-size: 15px;
        color: var(--text-secondary);
        margin: 0 0 16px 0;
        line-height: 1.8;
    }
    .compliance-flow {
        display: flex;
        flex-wrap: wrap;
        gap: 14px;
        margin-top: 18px;
    }
    .flow-step {
        flex: 1 1 170px;
        background: #fff;
        border: 1px solid var(--border-color);
        border-radius: 10px;
        padding: 16px;
        text-align: left;
        box-shadow: var(--shadow-card);
    }
    .flow-step-num {
        width: 30px;
        height: 30px;
        background: var(--primary-light);
        color: var(--primary);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-weight: 700;
        font-size: 14px;
        margin-bottom: 10px;
    }
    .flow-step h4 {
        font-size: 15px;
        font-weight: 600;
        color: var(--text-primary);
        margin: 0 0 6px 0;
    }
    .flow-step p {
        font-size: 13px;
        color: var(--text-secondary);
        margin: 0;
        line-height: 1.65;
    }

    .faq-accordion {
        background: var(--bg-card-soft);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-card);
        overflow: hidden;
        box-shadow: var(--shadow-card);
    }
    .faq-item {
        border-bottom: 1px solid var(--border-color);
    }
    .faq-item:last-child {
        border-bottom: 0;
    }
    .faq-question {
        width: 100%;
        background: #fff;
        border: 0;
        padding: 18px 22px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        text-align: left;
        cursor: pointer;
        font-size: 15px;
        font-weight: 600;
        color: var(--text-primary);
        transition: background var(--transition-base);
    }
    .faq-question:hover {
        background: var(--primary-faint);
    }
    .faq-question .faq-icon {
        color: var(--primary);
        flex-shrink: 0;
        transition: transform var(--transition-base);
    }
    .faq-item.open .faq-icon {
        transform: rotate(180deg);
    }
    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--transition-base), padding var(--transition-base);
        background: #fff;
    }
    .faq-item.open .faq-answer {
        max-height: 260px;
    }
    .faq-answer-inner {
        padding: 0 22px 20px;
        font-size: 14px;
        color: var(--text-secondary);
        line-height: 1.8;
    }

    .cta-panel {
        background: var(--bg-card-soft);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-card);
        overflow: hidden;
        display: flex;
        flex-wrap: wrap;
        align-items: stretch;
    }
    .cta-panel-copy {
        flex: 1 1 45%;
        padding: 36px 32px;
    }
    .cta-panel-copy h2 {
        font-size: 24px;
        font-weight: 700;
        color: var(--text-primary);
        margin: 0 0 12px 0;
    }
    .cta-panel-copy p {
        font-size: 15px;
        color: var(--text-secondary);
        margin: 0 0 20px 0;
        line-height: 1.8;
    }
    .cta-panel-form {
        flex: 1 1 50%;
        background: #fff;
        padding: 32px;
        border-left: 1px solid var(--border-color);
        display: flex;
        flex-direction: column;
        justify-content: center;
    }
    .form-field {
        margin-bottom: 16px;
    }
    .form-field label {
        display: block;
        font-size: 13px;
        font-weight: 600;
        color: var(--text-secondary);
        margin-bottom: 6px;
    }
    .form-field input,
    .form-field textarea {
        width: 100%;
        background: #fff;
        border: 1px solid var(--border-color);
        border-radius: 8px;
        padding: 10px 12px;
        font-size: 14px;
        color: var(--text-primary);
        transition: border-color var(--transition-base), box-shadow var(--transition-base);
    }
    .form-field input:focus,
    .form-field textarea:focus {
        border-color: var(--primary);
        box-shadow: 0 0 0 3px var(--border-focus);
        outline: none;
    }
    .form-field textarea {
        min-height: 88px;
        resize: vertical;
    }
    .form-note {
        font-size: 12px;
        color: var(--text-muted);
        margin-top: 8px;
        line-height: 1.6;
    }

    /* Footer */
    .site-footer {
        background: var(--text-primary);
        color: rgba(255,255,255,0.78);
        margin-top: 48px;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 1.3fr 1fr 1fr 1.2fr;
        gap: 30px;
        padding: 40px 0 28px;
    }
    .footer-brand p {
        font-size: 13px;
        line-height: 1.8;
        margin: 14px 0 0;
        color: rgba(255,255,255,0.68);
    }
    .footer-logo {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        font-size: 17px;
        font-weight: 700;
        color: #fff;
    }
    .footer-logo span {
        background: var(--primary);
        border-radius: 8px;
        padding: 4px 8px;
        color: #fff;
        font-size: 15px;
    }
    .footer-col h4 {
        color: #fff;
        font-size: 15px;
        font-weight: 600;
        margin: 0 0 14px 0;
    }
    .footer-col ul {
        list-style: none;
        margin: 0;
        padding: 0;
    }
    .footer-col li {
        margin-bottom: 8px;
        font-size: 13px;
        color: rgba(255,255,255,0.68);
    }
    .footer-col a {
        color: rgba(255,255,255,0.68);
        text-decoration: none;
        transition: color var(--transition-base);
    }
    .footer-col a:hover {
        color: #fff;
        text-decoration: underline;
    }
    .footer-bottom {
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
        gap: 12px;
        padding: 18px 0 20px;
        border-top: 1px solid rgba(255,255,255,0.12);
        font-size: 12px;
        color: rgba(255,255,255,0.55);
    }
    .footer-legal {
        display: flex;
        flex-wrap: wrap;
        gap: 14px;
    }
    .footer-legal a {
        color: rgba(255,255,255,0.68);
        text-decoration: none;
    }
    .footer-legal a:hover {
        color: #fff;
        text-decoration: underline;
    }

    /* Responsive */
    @media (max-width: 1024px) {
        .nav-links {
            justify-content: flex-start;
        }
        .card-wall-item.wide-5,
        .card-wall-item.wide-7,
        .card-wall-item.wide-6,
        .card-wall-item.wide-4,
        .card-wall-item.wide-8 {
            grid-column: span 6;
        }
        .security-split {
            grid-template-columns: 1fr;
        }
        .footer-grid {
            grid-template-columns: 1fr 1fr;
        }
    }
    @media (max-width: 768px) {
        .nav-panel {
            flex-wrap: wrap;
        }
        .nav-links {
            display: none;
            flex: 1 0 100%;
            flex-direction: column;
            align-items: stretch;
            gap: 4px;
            background: #fff;
            border-radius: 10px;
            padding: 10px 8px;
            border: 1px solid var(--border-color);
        }
        .nav-links.mobile-open {
            display: flex;
        }
        .nav-card-link {
            width: 100%;
            padding: 10px 12px;
        }
        .nav-toggle {
            display: flex;
        }
        .nav-cta {
            display: none;
        }
        .security-banner-copy {
            padding: 28px 20px;
        }
        .security-banner-copy h1 {
            font-size: 26px;
        }
        .security-banner-media {
            min-height: 210px;
            flex-basis: 100%;
        }
        .card-wall-item.wide-5,
        .card-wall-item.wide-7,
        .card-wall-item.wide-6,
        .card-wall-item.wide-4,
        .card-wall-item.wide-8,
        .card-wall-item.wide-12 {
            grid-column: span 12;
        }
        .metric-strip {
            flex-direction: column;
            gap: 14px;
        }
        .cta-panel-form {
            border-left: 0;
            border-top: 1px solid var(--border-color);
        }
        .footer-grid {
            grid-template-columns: 1fr;
            gap: 22px;
        }
        .footer-bottom {
            flex-direction: column;
        }
    }
    @media (max-width: 520px) {
        .section-heading h2 {
            font-size: 22px;
        }
        .security-banner-copy h1 {
            font-size: 24px;
        }
        .section-gap {
            padding-top: 36px;
            padding-bottom: 36px;
        }
        .btn-primary,
        .btn-secondary {
            width: 100%;
            justify-content: center;
        }
    }

/* roulang page: category5 */
:root {
            --primary: #1A5FAA;
            --primary-hover: #164d8a;
            --primary-light: #E6F0FA;
            --primary-faint: #E9F0F7;
            --bg-page: #F5F8FC;
            --bg-card: #FFFFFF;
            --bg-card-soft: #FBFDFF;
            --text-primary: #1A2B3C;
            --text-secondary: #52687A;
            --text-muted: #7A8FA3;
            --border-color: #DCE6F0;
            --border-focus: rgba(26, 95, 170, 0.45);
            --radius-card: 10px;
            --radius-btn: 8px;
            --radius-nav: 14px;
            --radius-sm: 6px;
            --shadow-card: 0 4px 16px rgba(26, 43, 60, 0.06);
            --shadow-card-hover: 0 8px 24px rgba(26, 95, 170, 0.12);
            --shadow-nav: 0 2px 12px rgba(26, 43, 60, 0.05);
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            --section-gap: 72px;
            --section-gap-mobile: 44px;
            --card-padding: 28px;
            --card-padding-mobile: 18px;
            --max-width: 1200px;
        }

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

        body {
            font-family: var(--font-stack);
            font-size: 15px;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--bg-page);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition-base), text-decoration var(--transition-base);
        }

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

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

        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .section-gap {
            padding-top: var(--section-gap);
            padding-bottom: var(--section-gap);
        }

        .section-gap-sm {
            padding-top: 48px;
            padding-bottom: 48px;
        }

        .section-heading {
            margin-bottom: 36px;
        }

        .section-heading h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 10px 0;
            letter-spacing: -0.01em;
        }

        .section-heading p {
            font-size: 16px;
            color: var(--text-secondary);
            margin: 0;
            max-width: 760px;
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 4px 14px;
            border-radius: 20px;
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            padding: 16px 0 12px;
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--bg-page);
        }

        .nav-panel {
            background: var(--bg-card);
            border-radius: var(--radius-nav);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-nav);
            padding: 8px 16px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: nowrap;
            transition: box-shadow var(--transition-base);
        }

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

        .nav-brand .brand-icon {
            width: 38px;
            height: 38px;
            background: var(--primary);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            letter-spacing: -0.01em;
        }

        .nav-brand .brand-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
            justify-content: center;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: thin;
            -webkit-overflow-scrolling: touch;
            padding: 2px 4px;
        }

        .nav-links::-webkit-scrollbar {
            height: 4px;
        }

        .nav-links::-webkit-scrollbar-thumb {
            background: var(--border-color);
            border-radius: 4px;
        }

        .nav-card-link {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 8px 14px;
            border-radius: 8px;
            font-size: 13.5px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            border: 1px solid transparent;
            transition: all var(--transition-base);
        }

        .nav-card-link i {
            font-size: 13px;
            color: var(--text-muted);
            transition: color var(--transition-base);
        }

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

        .nav-card-link:hover i {
            color: var(--primary);
        }

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

        .nav-card-link.active i {
            color: var(--primary);
        }

        .nav-cta {
            flex-shrink: 0;
        }

        .nav-cta .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13.5px;
            font-weight: 600;
            padding: 10px 20px;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: var(--radius-btn);
            cursor: pointer;
            font-weight: 600;
            transition: all var(--transition-base);
            text-decoration: none;
            display: inline-block;
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            color: #fff;
            text-decoration: none;
            box-shadow: 0 4px 12px rgba(26, 95, 170, 0.25);
        }

        .btn-primary:active {
            transform: translateY(1px);
        }

        .btn-secondary {
            background: #fff;
            color: var(--primary);
            border: 1px solid var(--primary);
            border-radius: var(--radius-btn);
            cursor: pointer;
            font-weight: 600;
            transition: all var(--transition-base);
            text-decoration: none;
            display: inline-block;
            padding: 12px 24px;
        }

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

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 22px;
            color: var(--text-primary);
            cursor: pointer;
            padding: 6px 10px;
            border-radius: 8px;
            transition: background var(--transition-base);
        }

        .nav-toggle:hover {
            background: var(--primary-faint);
        }

        /* ===== Hero ===== */
        .hero-section {
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            border-radius: var(--radius-card);
            position: relative;
            overflow: hidden;
            min-height: 420px;
            display: flex;
            align-items: center;
            margin-top: 20px;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 43, 60, 0.88) 0%, rgba(26, 95, 170, 0.78) 55%, rgba(26, 43, 60, 0.65) 100%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            padding: 56px 52px;
            max-width: 820px;
            color: #fff;
        }

        .hero-content .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.16);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.32);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            color: #e6f0fa;
            margin-bottom: 18px;
        }

        .hero-content h1 {
            font-size: 36px;
            font-weight: 700;
            margin: 0 0 16px 0;
            line-height: 1.3;
            letter-spacing: -0.01em;
            color: #fff;
        }

        .hero-content .hero-subtitle {
            font-size: 17px;
            line-height: 1.75;
            color: rgba(255, 255, 255, 0.88);
            margin: 0 0 28px 0;
            max-width: 640px;
        }

        .hero-metrics {
            display: flex;
            gap: 18px;
            flex-wrap: wrap;
        }

        .hero-metric-item {
            background: rgba(255, 255, 255, 0.14);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.24);
            border-radius: 10px;
            padding: 12px 20px;
            text-align: center;
            min-width: 110px;
        }

        .hero-metric-item .metric-num {
            font-size: 24px;
            font-weight: 700;
            color: #fff;
            line-height: 1.2;
        }

        .hero-metric-item .metric-label {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.75);
            margin-top: 2px;
        }

        /* ===== Feature Cards ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-card);
            padding: var(--card-padding);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }

        .feature-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(26, 95, 170, 0.4);
            transform: translateY(-2px);
        }

        .feature-card-icon {
            width: 48px;
            height: 48px;
            background: var(--primary-light);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--primary);
            margin-bottom: 16px;
            flex-shrink: 0;
        }

        .feature-card h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 10px 0;
            letter-spacing: -0.01em;
        }

        .feature-card p {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.7;
        }

        /* ===== Timeline ===== */
        .timeline-section {
            background: var(--bg-card-soft);
            border-radius: var(--radius-card);
            border: 1px solid var(--border-color);
            padding: var(--card-padding);
            box-shadow: var(--shadow-card);
        }

        .timeline {
            position: relative;
            padding-left: 36px;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 12px;
            top: 6px;
            bottom: 6px;
            width: 2px;
            background: var(--border-color);
            border-radius: 2px;
        }

        .timeline-item {
            position: relative;
            margin-bottom: 28px;
            padding-left: 24px;
        }

        .timeline-item:last-child {
            margin-bottom: 0;
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: -30px;
            top: 8px;
            width: 14px;
            height: 14px;
            background: var(--primary);
            border-radius: 50%;
            border: 3px solid #fff;
            box-shadow: 0 0 0 3px var(--primary-light);
            z-index: 1;
        }

        .timeline-item .timeline-step {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            color: var(--primary);
            background: var(--primary-light);
            padding: 3px 12px;
            border-radius: 14px;
            margin-bottom: 8px;
            letter-spacing: 0.03em;
        }

        .timeline-item h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 8px 0;
            letter-spacing: -0.01em;
        }

        .timeline-item p {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.7;
        }

        .timeline-item .timeline-detail {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 10px;
        }

        .timeline-tag {
            font-size: 12px;
            color: var(--text-secondary);
            background: var(--primary-faint);
            padding: 3px 10px;
            border-radius: 6px;
            border: 1px solid var(--border-color);
        }

        /* ===== Compliance List ===== */
        .compliance-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .compliance-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-card);
            padding: 22px 24px;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            display: flex;
            align-items: flex-start;
            gap: 14px;
        }

        .compliance-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(26, 95, 170, 0.4);
        }

        .compliance-icon {
            width: 42px;
            height: 42px;
            background: var(--primary-light);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--primary);
            flex-shrink: 0;
        }

        .compliance-card h3 {
            font-size: 15.5px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 6px 0;
        }

        .compliance-card p {
            font-size: 13.5px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.65;
        }

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

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

        .faq-item.active {
            border-color: var(--primary);
            box-shadow: var(--shadow-card-hover);
        }

        .faq-question {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 18px 24px;
            cursor: pointer;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            font-size: 15.5px;
            font-weight: 600;
            color: var(--text-primary);
            transition: color var(--transition-base);
            font-family: inherit;
        }

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

        .faq-question .faq-icon {
            width: 32px;
            height: 32px;
            background: var(--primary-light);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--primary);
            flex-shrink: 0;
            transition: all var(--transition-base);
        }

        .faq-item.active .faq-icon {
            background: var(--primary);
            color: #fff;
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.3s ease;
            padding: 0 24px;
        }

        .faq-item.active .faq-answer {
            max-height: 400px;
            padding: 0 24px 20px 24px;
        }

        .faq-answer p {
            font-size: 14.5px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.75;
        }

        /* ===== CTA Form ===== */
        .cta-section {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0;
        }

        .cta-info {
            padding: 36px 40px;
            background: var(--primary);
            color: #fff;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .cta-info h2 {
            font-size: 24px;
            font-weight: 700;
            margin: 0 0 14px 0;
            letter-spacing: -0.01em;
            color: #fff;
        }

        .cta-info p {
            font-size: 14.5px;
            color: rgba(255, 255, 255, 0.85);
            margin: 0 0 20px 0;
            line-height: 1.7;
        }

        .cta-info .cta-feature-list {
            list-style: none;
            margin: 0 0 0 0;
            padding: 0;
        }

        .cta-info .cta-feature-list li {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.9);
            padding: 6px 0;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .cta-info .cta-feature-list li i {
            color: #a8d4ff;
            font-size: 14px;
            flex-shrink: 0;
        }

        .cta-form-wrap {
            padding: 36px 40px;
            background: var(--bg-card-soft);
        }

        .cta-form-wrap h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 20px 0;
        }

        .form-group {
            margin-bottom: 16px;
        }

        .form-group label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
        }

        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 10px 14px;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-btn);
            font-size: 14px;
            color: var(--text-primary);
            background: #fff;
            transition: border-color var(--transition-base), box-shadow var(--transition-base);
            box-sizing: border-box;
        }

        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px var(--border-focus);
            outline: none;
        }

        .form-group textarea {
            resize: vertical;
            min-height: 82px;
        }

        .form-hint {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 6px;
        }

        .btn-submit {
            width: 100%;
            padding: 12px 24px;
            font-size: 15px;
            font-weight: 600;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: var(--radius-btn);
            cursor: pointer;
            transition: all var(--transition-base);
            margin-top: 8px;
        }

        .btn-submit:hover {
            background: var(--primary-hover);
            box-shadow: 0 4px 12px rgba(26, 95, 170, 0.25);
        }

        .btn-submit:active {
            transform: translateY(1px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--text-primary);
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 28px;
            margin-top: var(--section-gap);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.4fr;
            gap: 36px;
            margin-bottom: 36px;
        }

        .footer-brand .footer-logo {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 14px;
        }

        .footer-brand .footer-logo span {
            background: var(--primary);
            border-radius: 8px;
            padding: 4px 10px;
            font-size: 16px;
            color: #fff;
        }

        .footer-brand p {
            font-size: 13.5px;
            line-height: 1.75;
            margin: 0;
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin: 0 0 14px 0;
        }

        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 13.5px;
            transition: color var(--transition-base);
        }

        .footer-col ul li a:hover {
            color: #fff;
            text-decoration: none;
        }

        .footer-col ul li {
            font-size: 13.5px;
            color: rgba(255, 255, 255, 0.65);
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-legal {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 12.5px;
            color: rgba(255, 255, 255, 0.5);
            flex-wrap: wrap;
        }

        .footer-legal a {
            color: rgba(255, 255, 255, 0.5);
            transition: color var(--transition-base);
        }

        .footer-legal a:hover {
            color: #fff;
            text-decoration: none;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .nav-links {
                gap: 4px;
            }
            .nav-card-link {
                padding: 7px 10px;
                font-size: 12.5px;
            }
            .nav-card-link i {
                font-size: 12px;
            }
            .hero-content {
                padding: 40px 32px;
            }
            .hero-content h1 {
                font-size: 30px;
            }
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cta-section {
                grid-template-columns: 1fr;
            }
            .cta-info {
                padding: 28px 32px;
            }
            .cta-form-wrap {
                padding: 28px 32px;
            }
        }

        @media (max-width: 768px) {
            .site-header {
                padding: 10px 0 8px;
            }
            .nav-panel {
                flex-wrap: wrap;
                padding: 8px 12px;
            }
            .nav-toggle {
                display: block;
            }
            .nav-links {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                padding: 8px 0 4px;
                border-top: 1px solid var(--border-color);
            }
            .nav-links.nav-open {
                display: flex;
            }
            .nav-card-link {
                padding: 10px 14px;
                font-size: 14px;
                justify-content: flex-start;
            }
            .nav-cta {
                display: none;
            }
            .nav-cta.nav-cta-mobile-show {
                display: block;
                width: 100%;
                padding: 6px 0 2px;
                border-top: 1px solid var(--border-color);
            }
            .nav-cta.nav-cta-mobile-show .btn-primary {
                width: 100%;
                justify-content: center;
            }
            .hero-section {
                min-height: 320px;
                margin-top: 12px;
            }
            .hero-content {
                padding: 28px 20px;
            }
            .hero-content h1 {
                font-size: 26px;
            }
            .hero-content .hero-subtitle {
                font-size: 15px;
            }
            .hero-metrics {
                gap: 10px;
            }
            .hero-metric-item {
                min-width: 80px;
                padding: 8px 14px;
            }
            .hero-metric-item .metric-num {
                font-size: 20px;
            }
            :root {
                --section-gap: var(--section-gap-mobile);
                --card-padding: var(--card-padding-mobile);
            }
            .section-heading h2 {
                font-size: 22px;
            }
            .feature-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .compliance-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .timeline {
                padding-left: 28px;
            }
            .timeline::before {
                left: 8px;
            }
            .timeline-item {
                padding-left: 16px;
            }
            .timeline-item::before {
                left: -22px;
                top: 7px;
                width: 12px;
                height: 12px;
            }
            .cta-section {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
        }

        @media (max-width: 480px) {
            .hero-content h1 {
                font-size: 22px;
            }
            .hero-content .hero-subtitle {
                font-size: 14px;
            }
            .hero-metric-item {
                min-width: 70px;
                padding: 6px 10px;
            }
            .hero-metric-item .metric-num {
                font-size: 18px;
            }
            .section-heading h2 {
                font-size: 20px;
            }
            .cta-info {
                padding: 22px 18px;
            }
            .cta-form-wrap {
                padding: 22px 18px;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 14px;
                gap: 10px;
            }
            .faq-answer {
                padding: 0 16px;
            }
            .faq-item.active .faq-answer {
                padding: 0 16px 16px 16px;
            }
        }