/* roulang page: index */
:root {
            --brand-dark: #111215;
            --brand-black: #0D0D0E;
            --brand-primary: #FF3B30;
            --brand-primary-hover: #E02E24;
            --brand-slate: #8E8E93;
            --brand-light-gray: #F4F4F6;
            --brand-body-bg: #F8F8FA;
            --brand-card-bg: #FFFFFF;
            --brand-border: #E5E5EA;
            --brand-border-dark: #24262B;
            --brand-text-main: #1C1C1E;
            --brand-text-muted: #636366;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 12px;
            --shadow-subtle: 0 4px 20px rgba(0, 0, 0, 0.04);
            --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.08);
            --transition-smooth: all 0.28s cubic-bezier(0.25, 1, 0.5, 1);
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--brand-body-bg);
            color: var(--brand-text-main);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
            padding-bottom: 0;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-smooth);
        }

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

        /* Typography & Headings */
        h1, h2, h3, h4, h5 {
            font-weight: 700;
            color: var(--brand-text-main);
            letter-spacing: -0.02em;
        }

        .section-tag {
            display: inline-block;
            font-size: 11px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.12em;
            color: var(--brand-primary);
            background: rgba(255, 59, 48, 0.08);
            padding: 4px 10px;
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            border: 1px solid rgba(255, 59, 48, 0.15);
        }

        .section-header {
            margin-bottom: 40px;
        }

        .section-title {
            font-size: 28px;
            line-height: 1.25;
            margin-bottom: 12px;
        }

        .section-subtitle {
            font-size: 15px;
            color: var(--brand-text-muted);
            max-width: 680px;
            line-height: 1.65;
        }

        /* Standard Buttons */
        .btn-brand {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            background-color: var(--brand-primary);
            color: #FFFFFF !important;
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            border: 1px solid transparent;
            box-shadow: 0 4px 12px rgba(255, 59, 48, 0.25);
            transition: var(--transition-smooth);
            cursor: pointer;
        }

        .btn-brand:hover {
            background-color: var(--brand-primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(255, 59, 48, 0.35);
        }

        .btn-brand:active {
            transform: scale(0.98);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 26px;
            background-color: transparent;
            color: var(--brand-text-main);
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            border: 1px solid var(--brand-border);
            transition: var(--transition-smooth);
            cursor: pointer;
        }

        .btn-outline:hover {
            border-color: var(--brand-dark);
            background-color: #FFFFFF;
            transform: translateY(-2px);
        }

        /* Top Sticky Header (Desktop) */
        .site-header {
            position: sticky;
            top: 0;
            height: 72px;
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--brand-border);
            z-index: 1000;
            display: flex;
            align-items: center;
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 19px;
            font-weight: 800;
            color: var(--brand-dark);
            letter-spacing: -0.03em;
        }

        .brand-logo .logo-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            background: var(--brand-dark);
            color: var(--brand-primary);
            font-size: 12px;
            font-weight: 900;
            border-radius: var(--radius-sm);
        }

        .desktop-nav {
            display: flex;
            align-items: center;
            list-style: none;
            gap: 32px;
            margin: 0;
        }

        .desktop-nav li a {
            font-size: 14px;
            font-weight: 500;
            color: var(--brand-text-main);
            position: relative;
            padding: 6px 0;
        }

        .desktop-nav li a.active,
        .desktop-nav li a:hover {
            color: var(--brand-primary);
        }

        .desktop-nav li a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--brand-primary);
        }

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

        /* Mobile Bottom Tab Bar */
        .mobile-bottom-tabs {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: #FFFFFF;
            border-top: 1px solid var(--brand-border);
            z-index: 1100;
            box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.04);
        }

        .mobile-tabs-grid {
            display: flex;
            height: 100%;
            width: 100%;
        }

        .mobile-tab-item {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            color: var(--brand-slate);
            font-size: 11px;
            font-weight: 500;
            gap: 4px;
        }

        .mobile-tab-item.active,
        .mobile-tab-item:hover {
            color: var(--brand-primary);
        }

        .mobile-tab-icon {
            font-size: 16px;
            line-height: 1;
        }

        /* General Section Blocks */
        .page-section {
            padding: 80px 0;
            position: relative;
        }

        .page-section.bg-light {
            background-color: var(--brand-light-gray);
            border-top: 1px solid var(--brand-border);
            border-bottom: 1px solid var(--brand-border);
        }

        .page-section.bg-dark {
            background-color: var(--brand-black);
            color: #FFFFFF;
            border-top: 1px solid var(--brand-border-dark);
            border-bottom: 1px solid var(--brand-border-dark);
        }

        .page-section.bg-dark h1,
        .page-section.bg-dark h2,
        .page-section.bg-dark h3,
        .page-section.bg-dark h4 {
            color: #FFFFFF;
        }

        .page-section.bg-dark .section-subtitle {
            color: #A1A1A6;
        }

        /* 1. Hero Section */
        .hero-section {
            padding: 72px 0 88px;
            background: radial-gradient(circle at 80% 20%, rgba(255, 59, 48, 0.04) 0%, transparent 60%), #FFFFFF;
            border-bottom: 1px solid var(--brand-border);
        }

        .hero-title {
            font-size: 44px;
            line-height: 1.15;
            font-weight: 800;
            color: var(--brand-dark);
            margin-bottom: 20px;
        }

        .hero-desc {
            font-size: 16px;
            color: var(--brand-text-muted);
            line-height: 1.7;
            margin-bottom: 32px;
        }

        .hero-stats-row {
            display: flex;
            gap: 24px;
            margin-top: 36px;
            padding-top: 28px;
            border-top: 1px solid var(--brand-border);
        }

        .hero-stat-item {
            flex: 1;
        }

        .hero-stat-value {
            font-size: 26px;
            font-weight: 800;
            color: var(--brand-dark);
            line-height: 1;
            margin-bottom: 6px;
        }

        .hero-stat-label {
            font-size: 12px;
            color: var(--brand-slate);
        }

        .hero-mockup-window {
            background: var(--brand-black);
            border: 1px solid var(--brand-border-dark);
            border-radius: var(--radius-lg);
            padding: 16px;
            box-shadow: 0 20px 48px rgba(0, 0, 0, 0.15);
            color: #FFFFFF;
        }

        .mockup-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-bottom: 12px;
            border-bottom: 1px solid #2C2C2E;
            margin-bottom: 16px;
            font-size: 12px;
            color: #8E8E93;
        }

        .mockup-dots {
            display: flex;
            gap: 6px;
        }

        .mockup-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: #3A3A3C;
        }

        .mockup-body {
            background: #1C1C1E;
            border-radius: var(--radius-sm);
            padding: 24px;
            border: 1px solid #2C2C2E;
        }

        .mockup-metric-pill {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 10px;
            border-radius: 4px;
            background: rgba(255, 59, 48, 0.2);
            color: var(--brand-primary);
            font-size: 11px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .mockup-code-block {
            font-family: SFMono-Regular, Menlo, Monaco, Consolas, monospace;
            font-size: 12px;
            color: #D1D1D6;
            line-height: 1.6;
        }

        /* 2. Feature Grid (Retail Shelf 2+3 layout) */
        .feature-grid-card {
            background: var(--brand-card-bg);
            border: 1px solid var(--brand-border);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            height: 100%;
            transition: var(--transition-smooth);
            position: relative;
        }

        .feature-grid-card:hover {
            border-color: #C7C7CC;
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }

        .feature-icon-box {
            width: 44px;
            height: 44px;
            background: var(--brand-light-gray);
            border: 1px solid var(--brand-border);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--brand-primary);
            margin-bottom: 20px;
            font-weight: 700;
        }

        .feature-grid-card h3 {
            font-size: 18px;
            margin-bottom: 12px;
        }

        .feature-grid-card p {
            font-size: 13.5px;
            color: var(--brand-text-muted);
            line-height: 1.6;
            margin: 0;
        }

        /* 3. Scenarios Section */
        .scenario-box {
            background: var(--brand-card-bg);
            border: 1px solid var(--brand-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            height: 100%;
            transition: var(--transition-smooth);
        }

        .scenario-box:hover {
            box-shadow: var(--shadow-hover);
        }

        .scenario-top-banner {
            height: 120px;
            background: linear-gradient(135deg, #1C1C1E 0%, #2C2C2E 100%);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 24px;
            border-bottom: 1px solid var(--brand-border);
        }

        .scenario-badge {
            background: rgba(255, 59, 48, 0.18);
            border: 1px solid var(--brand-primary);
            color: #FF5E3A;
            font-size: 11px;
            padding: 3px 8px;
            border-radius: 4px;
            font-weight: 600;
        }

        .scenario-body {
            padding: 28px 24px;
        }

        .scenario-body h3 {
            font-size: 18px;
            margin-bottom: 10px;
        }

        .scenario-body p {
            font-size: 13.5px;
            color: var(--brand-text-muted);
            line-height: 1.65;
            margin-bottom: 16px;
        }

        .scenario-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }

        .scenario-tag-item {
            font-size: 11px;
            background: var(--brand-light-gray);
            border: 1px solid var(--brand-border);
            padding: 3px 8px;
            border-radius: 3px;
            color: var(--brand-text-main);
        }

        /* 4. Interface Showcase */
        .console-frame {
            border-radius: var(--radius-lg);
            background: #16171B;
            border: 1px solid #2B2C33;
            overflow: hidden;
            box-shadow: 0 24px 60px rgba(0, 0, 0, 0.3);
        }

        .console-topbar {
            background: #111215;
            padding: 14px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-bottom: 1px solid #24252C;
            font-size: 12px;
            color: #8E8E93;
        }

        .console-grid {
            display: grid;
            grid-template-columns: 240px 1fr;
            min-height: 380px;
        }

        .console-sidebar {
            background: #141519;
            border-right: 1px solid #24252C;
            padding: 20px;
        }

        .console-side-item {
            padding: 10px 12px;
            border-radius: 6px;
            font-size: 13px;
            color: #8E8E93;
            margin-bottom: 6px;
            display: flex;
            justify-content: space-between;
        }

        .console-side-item.active {
            background: rgba(255, 59, 48, 0.12);
            color: #FF5E3A;
            font-weight: 600;
        }

        .console-main-view {
            padding: 28px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .stream-monitor-panel {
            background: #0D0D0E;
            border: 1px solid #24252C;
            border-radius: 8px;
            padding: 20px;
            margin-bottom: 20px;
        }

        .monitor-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 8px 0;
            border-bottom: 1px dashed #24252C;
            font-size: 13px;
        }

        .monitor-row:last-child {
            border-bottom: none;
        }

        /* 5. Case Studies */
        .case-card {
            background: var(--brand-card-bg);
            border: 1px solid var(--brand-border);
            border-radius: var(--radius-md);
            padding: 28px;
            height: 100%;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            transition: var(--transition-smooth);
        }

        .case-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: #C7C7CC;
        }

        .case-kpi-badge {
            font-size: 28px;
            font-weight: 800;
            color: var(--brand-primary);
            line-height: 1;
            margin-bottom: 4px;
        }

        .case-kpi-desc {
            font-size: 12px;
            color: var(--brand-slate);
            margin-bottom: 18px;
        }

        .case-card h3 {
            font-size: 17px;
            margin-bottom: 10px;
        }

        .case-card p {
            font-size: 13.5px;
            color: var(--brand-text-muted);
            line-height: 1.6;
            margin-bottom: 20px;
        }

        .case-footer-meta {
            border-top: 1px solid var(--brand-border);
            padding-top: 14px;
            font-size: 12px;
            color: var(--brand-slate);
            display: flex;
            justify-content: space-between;
        }

        /* 6. Technical Specs Table */
        .specs-table-wrapper {
            background: var(--brand-card-bg);
            border: 1px solid var(--brand-border);
            border-radius: var(--radius-md);
            overflow-x: auto;
        }

        .specs-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 13.5px;
            margin: 0;
        }

        .specs-table th {
            background: #FAFAFC;
            padding: 16px 20px;
            text-align: left;
            font-weight: 700;
            color: var(--brand-dark);
            border-bottom: 1px solid var(--brand-border);
        }

        .specs-table td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--brand-border);
            color: var(--brand-text-main);
        }

        .specs-table tr:last-child td {
            border-bottom: none;
        }

        .specs-table tr:hover td {
            background: #F8F8FA;
        }

        .param-tag {
            display: inline-block;
            padding: 2px 6px;
            background: var(--brand-light-gray);
            border-radius: 4px;
            font-size: 11px;
            font-family: monospace;
            color: var(--brand-dark);
            border: 1px solid var(--brand-border);
        }

        /* 7. Category Gateway */
        .gateway-card {
            background: #FFFFFF;
            border: 1px solid var(--brand-border);
            border-radius: var(--radius-lg);
            padding: 36px 32px;
            height: 100%;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            position: relative;
            overflow: hidden;
            transition: var(--transition-smooth);
        }

        .gateway-card.dark-theme {
            background: var(--brand-black);
            border-color: var(--brand-border-dark);
            color: #FFFFFF;
        }

        .gateway-card.dark-theme h3 {
            color: #FFFFFF;
        }

        .gateway-card.dark-theme p {
            color: #8E8E93;
        }

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

        .gateway-card h3 {
            font-size: 22px;
            margin-bottom: 12px;
        }

        .gateway-card p {
            font-size: 14px;
            line-height: 1.65;
            margin-bottom: 24px;
        }

        .gateway-list {
            list-style: none;
            margin: 0 0 28px 0;
            padding: 0;
        }

        .gateway-list li {
            padding: 8px 0;
            font-size: 13px;
            border-bottom: 1px solid var(--brand-border);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .gateway-card.dark-theme .gateway-list li {
            border-color: #24252C;
            color: #D1D1D6;
        }

        /* 8. Pricing Tiers */
        .pricing-card {
            background: var(--brand-card-bg);
            border: 1px solid var(--brand-border);
            border-radius: var(--radius-lg);
            padding: 36px 28px;
            height: 100%;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            position: relative;
            transition: var(--transition-smooth);
        }

        .pricing-card.featured {
            background: var(--brand-black);
            border-color: var(--brand-primary);
            color: #FFFFFF;
            transform: scale(1.02);
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.2);
        }

        .pricing-card.featured h3,
        .pricing-card.featured .pricing-cost {
            color: #FFFFFF;
        }

        .pricing-card.featured .pricing-sub {
            color: #8E8E93;
        }

        .pricing-badge {
            position: absolute;
            top: -12px;
            right: 24px;
            background: var(--brand-primary);
            color: #FFFFFF;
            font-size: 11px;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: var(--radius-sm);
            text-transform: uppercase;
        }

        .pricing-header {
            margin-bottom: 24px;
        }

        .pricing-cost {
            font-size: 36px;
            font-weight: 800;
            line-height: 1;
            margin: 16px 0 6px;
            color: var(--brand-dark);
        }

        .pricing-cost span {
            font-size: 14px;
            font-weight: 500;
            color: var(--brand-slate);
        }

        .pricing-features-list {
            list-style: none;
            margin: 0 0 32px 0;
            padding: 0;
        }

        .pricing-features-list li {
            padding: 9px 0;
            font-size: 13px;
            border-bottom: 1px solid var(--brand-border);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .pricing-card.featured .pricing-features-list li {
            border-color: #24252C;
            color: #D1D1D6;
        }

        /* 9. Testimonial Wall */
        .testimonial-card {
            background: var(--brand-card-bg);
            border: 1px solid var(--brand-border);
            border-radius: var(--radius-md);
            padding: 24px;
            margin-bottom: 24px;
            transition: var(--transition-smooth);
        }

        .testimonial-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: #C7C7CC;
        }

        .testimonial-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 14px;
        }

        .testimonial-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--brand-light-gray);
            border: 1px solid var(--brand-border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 14px;
            color: var(--brand-dark);
        }

        .testimonial-user h4 {
            font-size: 14px;
            margin: 0;
        }

        .testimonial-user p {
            font-size: 11.5px;
            color: var(--brand-slate);
            margin: 0;
        }

        .testimonial-body {
            font-size: 13px;
            color: var(--brand-text-main);
            line-height: 1.65;
            margin: 0;
        }

        /* 10. Trust & Certifications */
        .trust-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .trust-card {
            background: #FFFFFF;
            border: 1px solid var(--brand-border);
            border-radius: var(--radius-md);
            padding: 20px;
            text-align: center;
        }

        .trust-card h4 {
            font-size: 15px;
            margin-bottom: 6px;
        }

        .trust-card p {
            font-size: 12px;
            color: var(--brand-slate);
            margin: 0;
        }

        /* 11. FAQ Accordion */
        .faq-item {
            background: var(--brand-card-bg);
            border: 1px solid var(--brand-border);
            border-radius: var(--radius-sm);
            margin-bottom: 14px;
            overflow: hidden;
        }

        .faq-question {
            padding: 20px 24px;
            font-size: 15px;
            font-weight: 600;
            color: var(--brand-dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
        }

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

        .faq-answer {
            padding: 0 24px 20px 24px;
            font-size: 13.5px;
            color: var(--brand-text-muted);
            line-height: 1.7;
        }

        /* 12. News & Insights */
        .news-featured-card {
            background: var(--brand-card-bg);
            border: 1px solid var(--brand-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .news-cover-box {
            height: 200px;
            background: linear-gradient(135deg, #2C2C2E 0%, #111215 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFFFFF;
            font-size: 16px;
            font-weight: 700;
        }

        .news-featured-body {
            padding: 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .news-item-row {
            background: var(--brand-card-bg);
            border: 1px solid var(--brand-border);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            margin-bottom: 16px;
            transition: var(--transition-smooth);
        }

        .news-item-row:hover {
            border-color: #C7C7CC;
            box-shadow: var(--shadow-hover);
        }

        .news-item-row h4 {
            font-size: 15px;
            margin-bottom: 6px;
        }

        .news-item-row p {
            font-size: 12.5px;
            color: var(--brand-text-muted);
            margin: 0;
            line-height: 1.5;
        }

        /* 13. Final CTA Banner */
        .final-cta-box {
            background: var(--brand-black);
            border: 1px solid var(--brand-border-dark);
            border-radius: var(--radius-lg);
            padding: 56px 40px;
            color: #FFFFFF;
            text-align: center;
            position: relative;
        }

        .final-cta-box h2 {
            font-size: 32px;
            color: #FFFFFF;
            margin-bottom: 14px;
        }

        .final-cta-box p {
            color: #A1A1A6;
            max-width: 620px;
            margin: 0 auto 32px auto;
            font-size: 15px;
        }

        .cta-form {
            display: flex;
            max-width: 480px;
            margin: 0 auto;
            gap: 10px;
        }

        .cta-input {
            flex: 1;
            height: 48px;
            padding: 0 16px;
            background: #1C1C1E;
            border: 1px solid #3A3A3C;
            border-radius: var(--radius-sm);
            color: #FFFFFF;
            font-size: 14px;
            margin: 0;
        }

        .cta-input:focus {
            outline: none;
            border-color: var(--brand-primary);
            background: #242426;
        }

        /* Footer */
        .site-footer {
            background: #111215;
            color: #8E8E93;
            padding: 64px 0 32px 0;
            border-top: 1px solid #24252C;
            font-size: 13px;
        }

        .footer-col h4 {
            color: #FFFFFF;
            font-size: 14px;
            margin-bottom: 18px;
            font-weight: 600;
        }

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

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links li a {
            color: #8E8E93;
        }

        .footer-links li a:hover {
            color: #FFFFFF;
        }

        .footer-bottom {
            margin-top: 48px;
            padding-top: 24px;
            border-top: 1px solid #1C1D22;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
        }

        /* Responsive Breakpoints */
        @media (max-width: 1024px) {
            .trust-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .pricing-card.featured {
                transform: none;
            }
        }

        @media (max-width: 768px) {
            body {
                padding-bottom: 70px;
            }
            .site-header {
                height: 56px;
            }
            .desktop-nav,
            .header-actions .btn-brand {
                display: none;
            }
            .mobile-bottom-tabs {
                display: block;
            }
            .hero-title {
                font-size: 32px;
            }
            .section-title {
                font-size: 24px;
            }
            .console-grid {
                grid-template-columns: 1fr;
            }
            .console-sidebar {
                display: none;
            }
            .cta-form {
                flex-direction: column;
            }
            .cta-input,
            .cta-form .btn-brand {
                width: 100%;
            }
            .trust-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 12px;
                text-align: center;
            }
        }

/* roulang page: category1 */
:root {
    --brand-dark: #111215;
    --brand-black: #0D0D0E;
    --brand-primary: #FF3B30;
    --brand-primary-hover: #E02E24;
    --brand-slate: #8E8E93;
    --brand-light-gray: #F4F4F6;
    --brand-body-bg: #F8F8FA;
    --brand-card-bg: #FFFFFF;
    --brand-border: #E5E5EA;
    --brand-border-dark: #24262B;
    --brand-text-main: #1C1C1E;
    --brand-text-muted: #636366;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 12px;
    --shadow-subtle: 0 4px 20px rgba(0, 0, 0, 0.04);
    --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.08);
    --transition-smooth: all 0.28s cubic-bezier(0.25, 1, 0.5, 1);
  }
  * {
    box-sizing: border-box;
  }
  body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background-color: var(--brand-body-bg);
    color: var(--brand-text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    padding-bottom: 70px;
  }
  a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition-smooth);
  }
  a:hover {
    color: var(--brand-primary);
  }
  h1, h2, h3, h4, h5 {
    font-weight: 700;
    color: var(--brand-text-main);
    letter-spacing: -0.02em;
  }
  .section-tag {
    display: inline-block;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--brand-primary);
    background: rgba(255, 59, 48, 0.08);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
    border: 1px solid rgba(255, 59, 48, 0.15);
  }
  .section-header {
    margin-bottom: 32px;
  }
  .section-title {
    font-size: 26px;
    line-height: 1.3;
    margin-bottom: 10px;
  }
  .section-subtitle {
    font-size: 14px;
    color: var(--brand-text-muted);
    max-width: 680px;
    line-height: 1.6;
  }
  .btn-brand {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    background-color: var(--brand-primary);
    color: #FFFFFF !important;
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    box-shadow: 0 4px 12px rgba(255, 59, 48, 0.25);
    transition: var(--transition-smooth);
    cursor: pointer;
  }
  .btn-brand:hover {
    background-color: var(--brand-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(255, 59, 48, 0.35);
  }
  .btn-brand:active {
    transform: scale(0.98);
  }
  .btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 26px;
    background-color: transparent;
    color: var(--brand-text-main);
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: 1px solid var(--brand-border);
    transition: var(--transition-smooth);
    cursor: pointer;
  }
  .btn-outline:hover {
    border-color: var(--brand-dark);
    background-color: #FFFFFF;
    transform: translateY(-2px);
  }
  .site-header {
    position: sticky;
    top: 0;
    height: 72px;
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--brand-border);
    z-index: 1000;
    display: flex;
    align-items: center;
  }
  .nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
  }
  .brand-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 19px;
    font-weight: 800;
    color: var(--brand-dark);
    letter-spacing: -0.03em;
  }
  .brand-logo .logo-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: var(--brand-dark);
    color: var(--brand-primary);
    font-size: 12px;
    font-weight: 900;
    border-radius: var(--radius-sm);
  }
  .desktop-nav {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 32px;
    margin: 0;
  }
  .desktop-nav li a {
    font-size: 14px;
    font-weight: 500;
    color: var(--brand-text-main);
    position: relative;
    padding: 6px 0;
  }
  .desktop-nav li a.active,
  .desktop-nav li a:hover {
    color: var(--brand-primary);
  }
  .desktop-nav li a.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--brand-primary);
  }
  .header-actions {
    display: flex;
    align-items: center;
    gap: 14px;
  }
  .mobile-bottom-tabs {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: #FFFFFF;
    border-top: 1px solid var(--brand-border);
    z-index: 1100;
    box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.04);
  }
  .mobile-tabs-grid {
    display: flex;
    height: 100%;
    margin: 0;
    padding: 0;
    list-style: none;
  }
  .mobile-tabs-grid li {
    flex: 1;
  }
  .mobile-tab-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    font-size: 11px;
    font-weight: 500;
    color: var(--brand-slate);
    gap: 3px;
  }
  .mobile-tab-item svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
  }
  .mobile-tab-item.active {
    color: var(--brand-primary);
  }
  .category-hero {
    background: #FFFFFF;
    border-bottom: 1px solid var(--brand-border);
    padding: 38px 0 28px;
  }
  .breadcrumb-nav {
    font-size: 12px;
    color: var(--brand-slate);
    margin-bottom: 12px;
  }
  .breadcrumb-nav a {
    color: var(--brand-text-muted);
  }
  .breadcrumb-nav a:hover {
    color: var(--brand-primary);
  }
  .category-h1 {
    font-size: 32px;
    line-height: 1.2;
    margin-bottom: 10px;
    letter-spacing: -0.02em;
  }
  .category-lead {
    font-size: 14px;
    color: var(--brand-text-muted);
    max-width: 820px;
    line-height: 1.6;
    margin-bottom: 16px;
  }
  .category-meta-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 20px;
    font-size: 12px;
    color: var(--brand-slate);
  }
  .meta-stat-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }
  .meta-stat-item strong {
    color: var(--brand-dark);
    font-weight: 700;
    font-size: 13px;
  }
  .filter-sticky-bar {
    position: sticky;
    top: 72px;
    z-index: 900;
    background: rgba(248, 248, 250, 0.96);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--brand-border);
    padding: 14px 0;
  }
  .filter-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
  }
  .filter-chips {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
  }
  .chip-btn {
    display: inline-flex;
    align-items: center;
    font-size: 12px;
    font-weight: 500;
    padding: 6px 14px;
    border-radius: 20px;
    background: #FFFFFF;
    border: 1px solid var(--brand-border);
    color: var(--brand-text-main);
    cursor: pointer;
    transition: var(--transition-smooth);
  }
  .chip-btn:hover {
    border-color: var(--brand-dark);
    color: var(--brand-dark);
  }
  .chip-btn.active {
    background: var(--brand-dark);
    color: #FFFFFF;
    border-color: var(--brand-dark);
  }
  .sort-group {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 12px;
    color: var(--brand-text-muted);
  }
  .sort-select {
    font-size: 12px;
    padding: 5px 26px 5px 10px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--brand-border);
    background: #FFFFFF;
    color: var(--brand-text-main);
    cursor: pointer;
    height: 32px;
    margin-bottom: 0;
  }
  .grid-section {
    padding: 44px 0 54px;
  }
  .spec-card {
    background: var(--brand-card-bg);
    border: 1px solid var(--brand-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition-smooth);
    margin-bottom: 24px;
    box-shadow: var(--shadow-subtle);
    display: flex;
    flex-direction: column;
    height: calc(100% - 24px);
  }
  .spec-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(255, 59, 48, 0.4);
  }
  .card-poster {
    position: relative;
    width: 100%;
    padding-top: 56.25%;
    background: linear-gradient(135deg, #1C1C1E 0%, #0D0D0E 100%);
    overflow: hidden;
  }
  .poster-pattern {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.15;
    background-image: radial-gradient(#FFFFFF 1px, transparent 1px);
    background-size: 12px 12px;
  }
  .poster-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(17, 18, 21, 0.85);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #FFFFFF;
    font-size: 10px;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    letter-spacing: 0.05em;
  }
  .poster-format {
    position: absolute;
    bottom: 10px;
    left: 10px;
    display: flex;
    gap: 6px;
  }
  .format-tag {
    background: var(--brand-primary);
    color: #FFFFFF;
    font-size: 10px;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 4px;
  }
  .card-body {
    padding: 18px 16px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
  }
  .card-title {
    font-size: 15px;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 8px;
    color: var(--brand-text-main);
  }
  .card-title a:hover {
    color: var(--brand-primary);
  }
  .card-desc {
    font-size: 12px;
    color: var(--brand-text-muted);
    line-height: 1.55;
    margin-bottom: 14px;
    flex-grow: 1;
  }
  .card-metrics {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    background: var(--brand-light-gray);
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    font-size: 11px;
    margin-bottom: 14px;
  }
  .metric-item span {
    color: var(--brand-slate);
    display: block;
  }
  .metric-item strong {
    color: var(--brand-dark);
    font-weight: 600;
  }
  .card-footer-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 11px;
    color: var(--brand-slate);
    border-top: 1px solid var(--brand-border);
    padding-top: 10px;
    margin-top: auto;
  }
  .special-curation-section {
    background: #FFFFFF;
    padding: 60px 0;
    border-top: 1px solid var(--brand-border);
    border-bottom: 1px solid var(--brand-border);
  }
  .curation-card {
    background: linear-gradient(145deg, #111215 0%, #1A1C22 100%);
    color: #FFFFFF;
    border-radius: var(--radius-lg);
    padding: 36px;
    position: relative;
    overflow: hidden;
    height: 100%;
    border: 1px solid var(--brand-border-dark);
  }
  .curation-card h3 {
    color: #FFFFFF;
    font-size: 20px;
    margin-bottom: 12px;
  }
  .curation-card p {
    color: #A0A0A5;
    font-size: 13px;
    line-height: 1.65;
    margin-bottom: 22px;
  }
  .curation-list {
    list-style: none;
    margin: 0 0 24px 0;
    padding: 0;
  }
  .curation-list li {
    font-size: 13px;
    color: #D1D1D6;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
  }
  .curation-list li::before {
    content: '';
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--brand-primary);
  }
  .guide-section {
    padding: 64px 0;
  }
  .guide-box {
    background: #FFFFFF;
    border: 1px solid var(--brand-border);
    border-radius: var(--radius-md);
    padding: 30px;
    height: 100%;
    transition: var(--transition-smooth);
  }
  .guide-box:hover {
    border-color: var(--brand-dark);
    box-shadow: var(--shadow-subtle);
  }
  .guide-icon-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
  }
  .guide-step-tag {
    font-size: 11px;
    font-weight: 800;
    background: var(--brand-light-gray);
    color: var(--brand-dark);
    padding: 3px 8px;
    border-radius: 4px;
    letter-spacing: 0.05em;
  }
  .guide-box h4 {
    font-size: 17px;
    margin: 0;
  }
  .guide-box p {
    font-size: 13px;
    color: var(--brand-text-muted);
    line-height: 1.65;
    margin-bottom: 16px;
  }
  .guide-checklist {
    list-style: none;
    margin: 0;
    padding: 0;
    font-size: 12px;
    color: var(--brand-text-main);
  }
  .guide-checklist li {
    padding: 6px 0;
    border-bottom: 1px dashed var(--brand-border);
    display: flex;
    justify-content: space-between;
  }
  .guide-checklist li:last-child {
    border-bottom: none;
  }
  .faq-section {
    background: #FFFFFF;
    padding: 60px 0;
    border-top: 1px solid var(--brand-border);
    border-bottom: 1px solid var(--brand-border);
  }
  .accordion-item-wrap {
    border: 1px solid var(--brand-border);
    border-radius: var(--radius-sm);
    margin-bottom: 14px;
    background: var(--brand-body-bg);
    overflow: hidden;
  }
  .accordion-item-header {
    padding: 16px 20px;
    font-size: 15px;
    font-weight: 600;
    color: var(--brand-text-main);
    background: #FFFFFF;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  .accordion-item-body {
    padding: 16px 20px;
    font-size: 13px;
    color: var(--brand-text-muted);
    line-height: 1.7;
    border-top: 1px solid var(--brand-border);
    background: #FAFAFB;
  }
  .sub-cta-bar {
    padding: 56px 0;
  }
  .sub-cta-card {
    background: var(--brand-dark);
    border-radius: var(--radius-lg);
    padding: 40px;
    color: #FFFFFF;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 28px;
    border: 1px solid var(--brand-border-dark);
  }
  .sub-cta-info {
    max-width: 580px;
  }
  .sub-cta-info h3 {
    color: #FFFFFF;
    font-size: 22px;
    margin-bottom: 8px;
  }
  .sub-cta-info p {
    color: #8E8E93;
    font-size: 13px;
    margin-bottom: 0;
    line-height: 1.6;
  }
  .sub-form {
    display: flex;
    gap: 10px;
    flex-grow: 1;
    max-width: 440px;
  }
  .sub-input {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.18);
    color: #FFFFFF;
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    height: 44px;
    margin-bottom: 0;
  }
  .sub-input:focus {
    background: rgba(255, 255, 255, 0.12);
    border-color: var(--brand-primary);
    box-shadow: none;
    color: #FFFFFF;
  }
  .site-footer {
    background: #111215;
    color: #8E8E93;
    padding: 60px 0 32px;
    border-top: 1px solid #24262B;
  }
  .site-footer .brand-logo {
    color: #FFFFFF;
  }
  .site-footer .brand-logo .logo-badge {
    background: var(--brand-primary);
    color: #FFFFFF;
  }
  .footer-col h4 {
    font-size: 14px;
    color: #FFFFFF;
    margin-bottom: 16px;
    letter-spacing: -0.01em;
  }
  .footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
  }
  .footer-links li {
    font-size: 13px;
    margin-bottom: 10px;
  }
  .footer-links li a {
    color: #8E8E93;
  }
  .footer-links li a:hover {
    color: #FFFFFF;
  }
  .footer-bottom {
    border-top: 1px solid #1E2026;
    padding-top: 24px;
    margin-top: 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    flex-wrap: wrap;
    gap: 12px;
  }
  @media (max-width: 1024px) {
    .desktop-nav {
      gap: 18px;
    }
  }
  @media (max-width: 768px) {
.desktop-nav,
    .header-actions {
      display: none;
    }
    .mobile-bottom-tabs {
      display: block;
    }
    .category-h1 {
      font-size: 24px;
    }
    .filter-wrap {
      flex-direction: column;
      align-items: flex-start;
    }
    .sub-cta-card {
      padding: 24px;
      flex-direction: column;
      align-items: flex-start;
    }
    .sub-form {
      width: 100%;
      flex-direction: column;
    }
    .sub-input {
      width: 100%;
    }
  }

/* roulang page: category2 */
:root {
            --brand-dark: #111215;
            --brand-black: #0D0D0E;
            --brand-primary: #FF3B30;
            --brand-primary-hover: #E02E24;
            --brand-slate: #8E8E93;
            --brand-light-gray: #F4F4F6;
            --brand-body-bg: #F8F8FA;
            --brand-card-bg: #FFFFFF;
            --brand-border: #E5E5EA;
            --brand-border-dark: #24262B;
            --brand-text-main: #1C1C1E;
            --brand-text-muted: #636366;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 12px;
            --shadow-subtle: 0 4px 20px rgba(0, 0, 0, 0.04);
            --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.08);
            --transition-smooth: all 0.28s cubic-bezier(0.25, 1, 0.5, 1);
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--brand-body-bg);
            color: var(--brand-text-main);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
            padding-bottom: 0;
            margin: 0;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-smooth);
        }

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

        h1, h2, h3, h4, h5 {
            font-weight: 700;
            color: var(--brand-text-main);
            letter-spacing: -0.02em;
            margin-top: 0;
        }

        .section-tag {
            display: inline-block;
            font-size: 11px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.12em;
            color: var(--brand-primary);
            background: rgba(255, 59, 48, 0.08);
            padding: 4px 10px;
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            border: 1px solid rgba(255, 59, 48, 0.15);
        }

        /* Buttons */
        .btn-brand {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            background-color: var(--brand-primary);
            color: #FFFFFF !important;
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            border: 1px solid transparent;
            box-shadow: 0 4px 12px rgba(255, 59, 48, 0.25);
            transition: var(--transition-smooth);
            cursor: pointer;
        }

        .btn-brand:hover {
            background-color: var(--brand-primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(255, 59, 48, 0.35);
        }

        .btn-brand:active {
            transform: scale(0.98);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 26px;
            background-color: transparent;
            color: var(--brand-text-main);
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            border: 1px solid var(--brand-border);
            transition: var(--transition-smooth);
            cursor: pointer;
        }

        .btn-outline:hover {
            border-color: var(--brand-dark);
            background-color: #FFFFFF;
            transform: translateY(-2px);
        }

        /* Site Header */
        .site-header {
            position: sticky;
            top: 0;
            height: 72px;
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--brand-border);
            z-index: 1000;
            display: flex;
            align-items: center;
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 19px;
            font-weight: 800;
            color: var(--brand-dark);
            letter-spacing: -0.03em;
        }

        .brand-logo .logo-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            background: var(--brand-dark);
            color: var(--brand-primary);
            font-size: 12px;
            font-weight: 900;
            border-radius: var(--radius-sm);
        }

        .desktop-nav {
            display: flex;
            align-items: center;
            list-style: none;
            gap: 32px;
            margin: 0;
            padding: 0;
        }

        .desktop-nav li a {
            font-size: 14px;
            font-weight: 500;
            color: var(--brand-text-main);
            position: relative;
            padding: 6px 0;
        }

        .desktop-nav li a.active,
        .desktop-nav li a:hover {
            color: var(--brand-primary);
        }

        .desktop-nav li a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--brand-primary);
        }

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

        /* Mobile Bottom Tab Bar */
        .mobile-bottom-tabs {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: #FFFFFF;
            border-top: 1px solid var(--brand-border);
            z-index: 1100;
            box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.04);
        }

        .mobile-tabs-grid {
            display: flex;
            height: 100%;
            width: 100%;
        }

        .mobile-tab-item {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 3px;
            font-size: 11px;
            font-weight: 600;
            color: var(--brand-slate);
        }

        .mobile-tab-item svg {
            width: 20px;
            height: 20px;
            fill: currentColor;
        }

        .mobile-tab-item.active {
            color: var(--brand-primary);
        }

        /* Category Hero H1 */
        .cat-hero-section {
            background: #FFFFFF;
            border-bottom: 1px solid var(--brand-border);
            padding: 38px 0 34px 0;
        }

        .breadcrumbs-bar {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 12px;
            color: var(--brand-slate);
            margin-bottom: 14px;
        }

        .breadcrumbs-bar a {
            color: var(--brand-slate);
        }

        .breadcrumbs-bar a:hover {
            color: var(--brand-primary);
        }

        .cat-title-wrap {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 20px;
        }

        .cat-h1 {
            font-size: 32px;
            line-height: 1.2;
            margin: 0 0 10px 0;
            font-weight: 800;
            color: var(--brand-dark);
        }

        .cat-desc {
            font-size: 14px;
            color: var(--brand-text-muted);
            max-width: 720px;
            line-height: 1.6;
            margin: 0;
        }

        .cat-metric-badge {
            display: inline-flex;
            align-items: center;
            gap: 16px;
            background: var(--brand-light-gray);
            border: 1px solid var(--brand-border);
            padding: 10px 18px;
            border-radius: var(--radius-md);
        }

        .cat-metric-item {
            display: flex;
            flex-direction: column;
        }

        .cat-metric-value {
            font-size: 18px;
            font-weight: 800;
            color: var(--brand-dark);
            line-height: 1;
        }

        .cat-metric-label {
            font-size: 11px;
            color: var(--brand-slate);
            margin-top: 4px;
        }

        /* Filter Toolbar */
        .filter-toolbar-section {
            background: #FFFFFF;
            border-bottom: 1px solid var(--brand-border);
            position: sticky;
            top: 72px;
            z-index: 900;
            padding: 14px 0;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.02);
        }

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

        .chip-group {
            display: flex;
            align-items: center;
            gap: 8px;
            overflow-x: auto;
            white-space: nowrap;
            padding-bottom: 2px;
        }

        .chip-btn {
            padding: 6px 14px;
            font-size: 12px;
            font-weight: 600;
            border-radius: 40px;
            background: var(--brand-light-gray);
            color: var(--brand-text-muted);
            border: 1px solid transparent;
            cursor: pointer;
            transition: var(--transition-smooth);
        }

        .chip-btn.active, .chip-btn:hover {
            background: var(--brand-dark);
            color: #FFFFFF;
        }

        .filter-sort-select {
            font-size: 12px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--brand-border);
            background: #FFFFFF;
            color: var(--brand-text-main);
            outline: none;
            cursor: pointer;
        }

        /* Main Scenarios List (Wide Row Cards) */
        .scenarios-section {
            padding: 50px 0;
        }

        .scenario-item-card {
            background: var(--brand-card-bg);
            border: 1px solid var(--brand-border);
            border-radius: var(--radius-md);
            padding: 24px;
            margin-bottom: 24px;
            box-shadow: var(--shadow-subtle);
            transition: var(--transition-smooth);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .scenario-item-card:hover {
            border-color: #C7C7CC;
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .scenario-header {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 16px;
            margin-bottom: 16px;
            border-bottom: 1px solid var(--brand-border);
            padding-bottom: 16px;
        }

        .scenario-title-area h2 {
            font-size: 19px;
            margin: 0 0 6px 0;
            color: var(--brand-dark);
            font-weight: 700;
        }

        .scenario-tagline {
            font-size: 13px;
            color: var(--brand-text-muted);
            margin: 0;
        }

        .scenario-status-pill {
            font-size: 11px;
            font-weight: 700;
            color: #34C759;
            background: rgba(52, 199, 89, 0.1);
            padding: 4px 10px;
            border-radius: 40px;
            white-space: nowrap;
            border: 1px solid rgba(52, 199, 89, 0.2);
        }

        .scenario-body-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            background: var(--brand-light-gray);
            border-radius: var(--radius-sm);
            padding: 16px;
            margin-bottom: 18px;
        }

        .scenario-param-cell {
            display: flex;
            flex-direction: column;
        }

        .param-cell-title {
            font-size: 11px;
            color: var(--brand-slate);
            margin-bottom: 4px;
            font-weight: 500;
        }

        .param-cell-val {
            font-size: 14px;
            font-weight: 700;
            color: var(--brand-dark);
        }

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

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

        .scenario-meta-tag {
            font-size: 11px;
            color: var(--brand-text-muted);
            background: #FFFFFF;
            border: 1px solid var(--brand-border);
            padding: 3px 8px;
            border-radius: var(--radius-sm);
        }

        /* Featured Specials (Section 4) */
        .featured-specials-section {
            padding: 50px 0;
            background: #FFFFFF;
            border-top: 1px solid var(--brand-border);
            border-bottom: 1px solid var(--brand-border);
        }

        .special-topic-card {
            background: var(--brand-black);
            color: #FFFFFF;
            border-radius: var(--radius-lg);
            padding: 36px;
            position: relative;
            overflow: hidden;
            height: 100%;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .special-topic-card::after {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 160px;
            height: 160px;
            background: radial-gradient(circle, rgba(255, 59, 48, 0.25) 0%, transparent 70%);
            border-radius: 50%;
        }

        .special-topic-card h3 {
            color: #FFFFFF;
            font-size: 22px;
            margin-bottom: 12px;
        }

        .special-topic-card p {
            color: #AEAEB2;
            font-size: 14px;
            line-height: 1.6;
            margin-bottom: 24px;
        }

        .special-spec-list {
            list-style: none;
            margin: 0 0 28px 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .special-spec-list li {
            font-size: 13px;
            color: #E5E5EA;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .special-spec-list li::before {
            content: "✓";
            color: var(--brand-primary);
            font-weight: 900;
        }

        /* Deployment Guidelines (Section 5) */
        .standards-section {
            padding: 50px 0;
        }

        .guide-box {
            background: #FFFFFF;
            border: 1px solid var(--brand-border);
            border-radius: var(--radius-md);
            padding: 30px;
            height: 100%;
            box-shadow: var(--shadow-subtle);
        }

        .guide-box h4 {
            font-size: 18px;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .guide-box p {
            font-size: 13px;
            color: var(--brand-text-muted);
            line-height: 1.65;
            margin-bottom: 18px;
        }

        .guide-step-row {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            margin-bottom: 12px;
            font-size: 13px;
        }

        .guide-step-num {
            width: 20px;
            height: 20px;
            background: var(--brand-light-gray);
            color: var(--brand-dark);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 11px;
            font-weight: 700;
            flex-shrink: 0;
            margin-top: 2px;
        }

        /* Category FAQ (Section 6) */
        .faq-section {
            padding: 50px 0;
            background: #FFFFFF;
            border-top: 1px solid var(--brand-border);
        }

        .faq-accordion-item {
            background: var(--brand-body-bg);
            border: 1px solid var(--brand-border);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
        }

        .faq-question {
            padding: 18px 22px;
            font-size: 15px;
            font-weight: 700;
            color: var(--brand-dark);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            user-select: none;
        }

        .faq-question::after {
            content: "+";
            font-size: 18px;
            color: var(--brand-slate);
            transition: var(--transition-smooth);
        }

        .faq-accordion-item.active .faq-question::after {
            transform: rotate(45deg);
            color: var(--brand-primary);
        }

        .faq-answer {
            padding: 0 22px 18px 22px;
            font-size: 13px;
            color: var(--brand-text-muted);
            line-height: 1.65;
            display: none;
        }

        .faq-accordion-item.active .faq-answer {
            display: block;
        }

        /* Subscription & CTA (Section 7) */
        .cta-banner-section {
            padding: 50px 0 60px 0;
            background: var(--brand-body-bg);
        }

        .cta-inner-card {
            background: var(--brand-dark);
            color: #FFFFFF;
            border-radius: var(--radius-lg);
            padding: 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 24px;
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.12);
        }

        .cta-text-side h3 {
            color: #FFFFFF;
            font-size: 24px;
            margin-bottom: 8px;
        }

        .cta-text-side p {
            color: #8E8E93;
            font-size: 13px;
            margin: 0;
            max-width: 520px;
        }

        .cta-form-side {
            display: flex;
            align-items: center;
            gap: 10px;
            min-width: 360px;
        }

        .cta-input {
            background: #1C1C1E;
            border: 1px solid #2C2C2E;
            color: #FFFFFF;
            font-size: 13px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            outline: none;
            width: 100%;
            transition: var(--transition-smooth);
        }

        .cta-input:focus {
            border-color: var(--brand-primary);
            background: #242426;
        }

        /* Site Footer */
        .site-footer {
            background-color: var(--brand-dark);
            color: #8E8E93;
            padding: 60px 0 30px 0;
            border-top: 1px solid var(--brand-border-dark);
            font-size: 13px;
        }

        .footer-col h4 {
            color: #FFFFFF;
            font-size: 14px;
            margin-bottom: 18px;
            font-weight: 700;
        }

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

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            color: #8E8E93;
        }

        .footer-links a:hover {
            color: #FFFFFF;
        }

        .footer-bottom {
            border-top: 1px solid var(--brand-border-dark);
            margin-top: 40px;
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 12px;
            color: #636366;
        }

        /* Responsive Breakpoints */
        @media screen and (max-width: 1024px) {
            .scenario-body-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .desktop-nav {
                gap: 18px;
            }
        }

        @media screen and (max-width: 768px) {
            .desktop-nav, .header-actions {
                display: none;
            }
            .mobile-bottom-tabs {
                display: block;
            }
            body {
                padding-bottom: 70px;
            }
            .cat-hero-section {
                padding: 24px 0 20px 0;
            }
            .cat-h1 {
                font-size: 24px;
            }
            .scenario-body-grid {
                grid-template-columns: 1fr;
            }
            .cta-inner-card {
                padding: 24px;
            }
            .cta-form-side {
                min-width: 100%;
                flex-direction: column;
                align-items: stretch;
            }
            .cat-title-wrap {
                flex-direction: column;
                align-items: flex-start;
            }
        }