/* roulang page: index */
:root {
            --color-primary: #0F2B48;
            --color-primary-dark: #0A192F;
            --color-accent: #D97706;
            --color-accent-hover: #B45309;
            --color-teal: #0D9488;
            --color-bg-light: #F8FAFC;
            --color-card-bg: #FFFFFF;
            --color-text-main: #0F172A;
            --color-text-body: #334155;
            --color-text-muted: #64748B;
            --color-border: #E2E8F0;
            --radius-sm: 8px;
            --radius-lg: 16px;
            --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08);
            --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -1px rgba(15, 23, 42, 0.04);
            --shadow-lg: 0 10px 25px -5px rgba(15, 23, 42, 0.12);
            --container-width: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--color-text-body);
            background-color: var(--color-bg-light);
            line-height: 1.6;
        }

        body {
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
        }

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

        .container {
            width: 100%;
            max-width: var(--container-width);
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: all 0.25s ease;
            border: 1px solid transparent;
            line-height: 1.2;
            text-align: center;
        }

        .btn-primary {
            background-color: var(--color-accent);
            color: #FFFFFF;
        }
        .btn-primary:hover {
            background-color: var(--color-accent-hover);
            box-shadow: 0 4px 14px rgba(217, 119, 6, 0.35);
        }

        .btn-navy {
            background-color: var(--color-primary);
            color: #FFFFFF;
        }
        .btn-navy:hover {
            background-color: #173b61;
        }

        .btn-outline {
            background-color: transparent;
            color: #FFFFFF;
            border-color: rgba(255, 255, 255, 0.6);
        }
        .btn-outline:hover {
            background-color: rgba(255, 255, 255, 0.15);
            border-color: #FFFFFF;
        }

        .btn-outline-dark {
            background-color: transparent;
            color: var(--color-primary);
            border-color: var(--color-primary);
        }
        .btn-outline-dark:hover {
            background-color: var(--color-primary);
            color: #FFFFFF;
        }

        .badge {
            display: inline-block;
            padding: 4px 12px;
            font-size: 12px;
            font-weight: 600;
            border-radius: 9999px;
            background-color: rgba(13, 148, 136, 0.1);
            color: var(--color-teal);
            margin-bottom: 12px;
        }

        .badge-amber {
            background-color: rgba(217, 119, 6, 0.12);
            color: var(--color-accent);
        }

        .section-header {
            text-align: center;
            max-width: 780px;
            margin: 0 auto 50px auto;
        }
        .section-header h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--color-text-main);
            line-height: 1.3;
            margin-bottom: 14px;
        }
        .section-header p {
            font-size: 16px;
            color: var(--color-text-muted);
            line-height: 1.7;
        }

        .section-padding {
            padding-top: 80px;
            padding-bottom: 80px;
        }

        .section-alt {
            background-color: #F1F5F9;
        }

        /* Top Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background-color: #FFFFFF;
            box-shadow: var(--shadow-sm);
        }
        .header-topbar {
            background-color: var(--color-primary-dark);
            color: #94A3B8;
            font-size: 13px;
            padding: 6px 0;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .header-topbar-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .header-main {
            padding: 14px 0;
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .brand-logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--color-primary);
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .brand-logo span {
            color: var(--color-accent);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
        }
        .nav-links a {
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text-body);
        }
        .nav-links a:hover {
            color: var(--color-accent);
        }
        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            cursor: pointer;
            color: var(--color-primary);
        }

        /* 1. Hero Metric Dashboard (Video Mask Blueprint) */
        .hero-section {
            position: relative;
            background-color: var(--color-primary);
            background-image: linear-gradient(rgba(10, 25, 47, 0.88), rgba(15, 43, 72, 0.92)), url('/assets/images/eae0bebbe5fe24b9.webp');
            background-size: cover;
            background-position: center;
            color: #FFFFFF;
            padding: 100px 0 80px 0;
            overflow: hidden;
        }
        .hero-content {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
            align-items: center;
        }
        .hero-text h1 {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 20px;
            color: #FFFFFF;
        }
        .hero-text p {
            font-size: 16px;
            line-height: 1.8;
            color: #E2E8F0;
            margin-bottom: 32px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-metric-card {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(10px);
            border-radius: var(--radius-lg);
            padding: 30px;
        }
        .metric-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        .metric-item {
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            padding-bottom: 16px;
        }
        .metric-item:nth-last-child(-n+2) {
            border-bottom: none;
            padding-bottom: 0;
        }
        .metric-value {
            font-size: 32px;
            font-weight: 800;
            color: var(--color-accent);
            line-height: 1.1;
        }
        .metric-label {
            font-size: 13px;
            color: #CBD5E1;
            margin-top: 4px;
        }

        /* 2. Service Matrix */
        .matrix-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .matrix-card {
            background: var(--color-card-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .matrix-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .matrix-card-img {
            height: 200px;
            overflow: hidden;
        }
        .matrix-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .matrix-card:hover .matrix-card-img img {
            transform: scale(1.05);
        }
        .matrix-card-body {
            padding: 24px;
        }
        .matrix-card-body h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-text-main);
            margin-bottom: 12px;
        }
        .matrix-card-body p {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.6;
            margin-bottom: 16px;
        }
        .matrix-features {
            list-style: none;
            font-size: 13px;
            color: var(--color-text-body);
            border-top: 1px solid var(--color-border);
            padding-top: 16px;
        }
        .matrix-features li {
            position: relative;
            padding-left: 18px;
            margin-bottom: 8px;
        }
        .matrix-features li::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--color-teal);
            font-weight: bold;
        }

        /* 3. Key Strengths */
        .strengths-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .strength-card {
            background: var(--color-card-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 28px;
            transition: border-color 0.25s ease;
        }
        .strength-card:hover {
            border-color: var(--color-teal);
        }
        .strength-icon {
            width: 44px;
            height: 44px;
            border-radius: 8px;
            background: rgba(13, 148, 136, 0.1);
            color: var(--color-teal);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: bold;
            margin-bottom: 18px;
        }
        .strength-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text-main);
            margin-bottom: 10px;
        }
        .strength-card p {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.6;
        }

        /* 4. Featured Programs */
        .programs-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .program-card {
            background: var(--color-card-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 30px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            position: relative;
        }
        .program-card.highlight {
            border: 2px solid var(--color-accent);
            box-shadow: var(--shadow-md);
        }
        .program-badge {
            position: absolute;
            top: -12px;
            right: 24px;
            background: var(--color-accent);
            color: #FFFFFF;
            font-size: 12px;
            padding: 2px 10px;
            border-radius: 12px;
            font-weight: 600;
        }
        .program-header h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--color-text-main);
            margin-bottom: 8px;
        }
        .program-desc {
            font-size: 14px;
            color: var(--color-text-muted);
            margin-bottom: 20px;
        }
        .program-specs {
            margin-bottom: 24px;
            border-top: 1px dashed var(--color-border);
            border-bottom: 1px dashed var(--color-border);
            padding: 16px 0;
            font-size: 13px;
        }
        .program-spec-item {
            display: flex;
            justify-content: space-between;
            margin-bottom: 8px;
        }
        .program-spec-item:last-child {
            margin-bottom: 0;
        }
        .spec-label {
            color: var(--color-text-muted);
        }
        .spec-val {
            font-weight: 600;
            color: var(--color-text-main);
        }

        /* 5. Deep Dark Philosophy & Outcomes */
        .philosophy-section {
            background-color: var(--color-primary-dark);
            color: #FFFFFF;
            padding: 80px 0;
        }
        .philosophy-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .philosophy-content h2 {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 18px;
            line-height: 1.3;
        }
        .philosophy-content p {
            font-size: 15px;
            color: #94A3B8;
            line-height: 1.8;
            margin-bottom: 24px;
        }
        .comparison-table-wrapper {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-lg);
            overflow: hidden;
        }
        .compare-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            padding: 18px 24px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 14px;
        }
        .compare-row:last-child {
            border-bottom: none;
        }
        .compare-row.head {
            background: rgba(255, 255, 255, 0.08);
            font-weight: 700;
            color: #FFFFFF;
        }
        .compare-dim {
            color: #94A3B8;
        }
        .compare-emp {
            color: #38BDF8;
            font-weight: 600;
        }

        /* 6. Milestones Timeline */
        .timeline-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }
        .timeline-card {
            background: var(--color-card-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 24px;
            position: relative;
        }
        .timeline-step {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--color-primary);
            color: #FFFFFF;
            font-size: 14px;
            font-weight: bold;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 14px;
        }
        .timeline-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text-main);
            margin-bottom: 8px;
        }
        .timeline-card p {
            font-size: 13px;
            color: var(--color-text-muted);
            line-height: 1.6;
        }

        /* 7. Data Impact Bar */
        .impact-bar-section {
            background: linear-gradient(135deg, var(--color-primary) 0%, #1E3A5F 100%);
            color: #FFFFFF;
            padding: 50px 0;
        }
        .impact-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .impact-item h3 {
            font-size: 38px;
            font-weight: 800;
            color: var(--color-accent);
            line-height: 1.1;
            margin-bottom: 6px;
        }
        .impact-item p {
            font-size: 14px;
            color: #E2E8F0;
        }

        /* 8. Testimonials */
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .testimonial-card {
            background: var(--color-card-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 28px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .testimonial-rating {
            color: #F59E0B;
            font-size: 16px;
            margin-bottom: 12px;
        }
        .testimonial-quote {
            font-size: 14px;
            color: var(--color-text-body);
            line-height: 1.7;
            margin-bottom: 20px;
            font-style: italic;
        }
        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 12px;
            border-top: 1px solid var(--color-border);
            padding-top: 16px;
        }
        .author-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: #E2E8F0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            color: var(--color-primary);
        }
        .author-meta h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--color-text-main);
        }
        .author-meta span {
            font-size: 12px;
            color: var(--color-text-muted);
        }

        /* 9. News & Blueprint Layout (Left News Stream, Right Ranking) */
        .blueprint-news-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr;
            gap: 32px;
        }
        .news-stream-card {
            display: flex;
            gap: 18px;
            background: var(--color-card-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 16px;
            margin-bottom: 16px;
            transition: border-color 0.2s ease;
        }
        .news-stream-card:hover {
            border-color: var(--color-accent);
        }
        .news-thumb {
            width: 140px;
            height: 95px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
        }
        .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .news-info h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text-main);
            margin-bottom: 6px;
            line-height: 1.4;
        }
        .news-info p {
            font-size: 13px;
            color: var(--color-text-muted);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .ranking-panel {
            background: var(--color-card-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 24px;
        }
        .ranking-panel h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text-main);
            margin-bottom: 18px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--color-border);
        }
        .ranking-list {
            list-style: none;
        }
        .ranking-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 10px 0;
            border-bottom: 1px dashed var(--color-border);
            font-size: 14px;
        }
        .ranking-item:last-child {
            border-bottom: none;
        }
        .rank-num {
            width: 22px;
            height: 22px;
            border-radius: 4px;
            background: #F1F5F9;
            color: var(--color-text-muted);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: 700;
        }
        .rank-num.top {
            background: var(--color-accent);
            color: #FFFFFF;
        }

        /* 10. Platform & Security */
        .security-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .security-card {
            background: var(--color-card-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 24px;
            text-align: center;
        }
        .security-card .icon-wrap {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: rgba(15, 43, 72, 0.06);
            color: var(--color-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px auto;
            font-size: 20px;
            font-weight: bold;
        }
        .security-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text-main);
            margin-bottom: 8px;
        }
        .security-card p {
            font-size: 13px;
            color: var(--color-text-muted);
            line-height: 1.5;
        }

        /* 11. Diagnostic Preview */
        .diag-wrapper {
            background: #FFFFFF;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 36px;
            box-shadow: var(--shadow-sm);
        }
        .diag-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-bottom: 28px;
        }
        .diag-col label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text-main);
            margin-bottom: 8px;
        }
        .diag-select {
            width: 100%;
            padding: 12px 14px;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            background: #F8FAFC;
            font-size: 14px;
            color: var(--color-text-body);
        }

        /* 12. FAQ Accordion */
        .faq-accordion {
            max-width: 860px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--color-card-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            overflow: hidden;
        }
        .faq-item summary {
            padding: 18px 20px;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text-main);
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: "+";
            font-size: 20px;
            font-weight: 400;
            color: var(--color-text-muted);
            transition: transform 0.2s ease;
        }
        .faq-item[open] summary::after {
            content: "−";
        }
        .faq-content {
            padding: 0 20px 20px 20px;
            font-size: 14px;
            color: var(--color-text-body);
            line-height: 1.7;
            border-top: 1px solid #F1F5F9;
            padding-top: 14px;
        }

        /* 13. Conversion Form CTA */
        .conversion-section {
            background: linear-gradient(rgba(10, 25, 47, 0.95), rgba(15, 43, 72, 0.95)), url('/assets/images/172d334563e6be7c.webp');
            background-size: cover;
            background-position: center;
            color: #FFFFFF;
            padding: 80px 0;
        }
        .conversion-box {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .conv-info h2 {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 16px;
            line-height: 1.3;
        }
        .conv-info p {
            font-size: 15px;
            color: #CBD5E1;
            line-height: 1.8;
            margin-bottom: 24px;
        }
        .conv-promise-list {
            list-style: none;
            font-size: 14px;
            color: #94A3B8;
        }
        .conv-promise-list li {
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .conv-form {
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            padding: 36px;
            color: var(--color-text-main);
            box-shadow: var(--shadow-lg);
        }
        .conv-form h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 20px;
            text-align: center;
            color: var(--color-primary);
        }
        .form-group {
            margin-bottom: 16px;
        }
        .form-group label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-text-body);
            margin-bottom: 6px;
        }
        .form-control {
            width: 100%;
            padding: 12px 14px;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            font-size: 14px;
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }
        .form-control:focus {
            outline: none;
            border-color: var(--color-accent);
            box-shadow: 0 0 0 3px rgba(217, 119, 6, 0.15);
        }

        /* Footer */
        .site-footer {
            background-color: var(--color-primary-dark);
            color: #94A3B8;
            font-size: 14px;
            padding: 60px 0 24px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-col h3 {
            font-size: 16px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 18px;
        }
        .footer-col p {
            line-height: 1.7;
            font-size: 13px;
            margin-bottom: 14px;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a:hover {
            color: var(--color-accent);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 24px;
            text-align: center;
            font-size: 13px;
            color: #64748B;
        }

        /* Responsive Breakpoints */
        @media (max-width: 1024px) {
            .hero-content, .philosophy-grid, .blueprint-news-grid, .conversion-box {
                grid-template-columns: 1fr;
            }
            .matrix-grid, .strengths-grid, .programs-grid, .testimonials-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .timeline-grid, .security-grid, .impact-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .header-topbar {
                display: none;
            }
            .nav-links {
                display: none;
            }
            .mobile-menu-toggle {
                display: block;
            }
            .matrix-grid, .strengths-grid, .programs-grid, .testimonials-grid, .diag-grid, .security-grid, .impact-grid, .footer-grid {
                grid-template-columns: 1fr;
            }
            .hero-text h1 {
                font-size: 30px;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .hero-actions {
                flex-direction: column;
            }
            .hero-actions .btn {
                width: 100%;
            }
        }