/* roulang page: index */
:root {
            --primary: #0F52BA;
            --primary-hover: #0c4399;
            --secondary: #00A86B;
            --secondary-hover: #008f5b;
            --accent: #F59E0B;
            --dark-bg: #0A1128;
            --dark-card: #131E3D;
            --bg-light: #F8FAFC;
            --bg-white: #FFFFFF;
            --text-main: #1E293B;
            --text-muted: #64748B;
            --border-light: rgba(226, 232, 240, 0.9);
            --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 6px 16px -2px rgba(15, 82, 186, 0.08);
            --shadow-lg: 0 12px 28px -4px rgba(15, 82, 186, 0.12);
            --radius-md: 12px;
            --radius-lg: 18px;
            --container-max: 1280px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-light);
            color: var(--text-main);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: all 0.25s ease;
        }

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

        .container {
            width: 100%;
            max-width: var(--container-max);
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        /* 顶部通栏导航 */
        .top-bar {
            background-color: #0d1a38;
            color: #94a3b8;
            font-size: 0.85rem;
            padding: 0.5rem 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .top-bar-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .top-bar-info {
            display: flex;
            gap: 1.5rem;
        }
        .top-bar-badge {
            color: #38bdf8;
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }

        .navbar-sticky {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
        }
        .nav-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 72px;
        }
        .logo-area {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.02em;
        }
        .logo-badge {
            background: rgba(15, 82, 186, 0.1);
            color: var(--primary);
            font-size: 0.75rem;
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
            font-weight: 600;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 2rem;
            list-style: none;
        }
        .nav-item {
            font-weight: 500;
            color: #334155;
            font-size: 0.95rem;
        }
        .nav-item:hover, .nav-item.active {
            color: var(--primary);
        }
        .btn-trial {
            background-color: var(--primary);
            color: #ffffff;
            padding: 0.65rem 1.4rem;
            border-radius: 8px;
            font-weight: 600;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            box-shadow: 0 4px 10px rgba(15, 82, 186, 0.25);
        }
        .btn-trial:hover {
            background-color: var(--primary-hover);
            transform: translateY(-1px);
        }

        /* 倒计时通告条 */
        .promo-banner {
            background: linear-gradient(90deg, #0F52BA 0%, #1e40af 100%);
            color: #ffffff;
            padding: 0.75rem 0;
            font-size: 0.9rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .promo-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.75rem;
        }
        .countdown-box {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 600;
        }
        .cd-num {
            background: rgba(0, 0, 0, 0.25);
            padding: 0.15rem 0.45rem;
            border-radius: 4px;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        /* Hero 双栏门户：左主张右快捷入口网格 */
        .hero-section {
            position: relative;
            background: #ffffff;
            padding: 4.5rem 0 5rem 0;
            overflow: hidden;
            border-bottom: 1px solid #e2e8f0;
        }
        .hero-bg-overlay {
            position: absolute;
            top: 0;
            right: 0;
            width: 45%;
            height: 100%;
            background: url('/assets/images/99069126bfc06710.webp') center/cover no-repeat;
            opacity: 0.08;
            pointer-events: none;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1.25fr 1fr;
            gap: 3.5rem;
            align-items: center;
            position: relative;
            z-index: 2;
        }
        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: #eef2ff;
            color: var(--primary);
            font-size: 0.85rem;
            font-weight: 600;
            padding: 0.4rem 0.9rem;
            border-radius: 30px;
            margin-bottom: 1.25rem;
            border: 1px solid rgba(15, 82, 186, 0.2);
        }
        h1.hero-title {
            font-size: 2.75rem;
            line-height: 1.25;
            letter-spacing: -0.02em;
            color: #0f172a;
            margin-bottom: 1.25rem;
            font-weight: 800;
        }
        .hero-title span {
            color: var(--primary);
        }
        .hero-desc {
            font-size: 1.05rem;
            color: #475569;
            margin-bottom: 2rem;
            line-height: 1.8;
        }
        .hero-cta-group {
            display: flex;
            align-items: center;
            gap: 1rem;
            margin-bottom: 2.5rem;
        }
        .btn-primary {
            background-color: var(--primary);
            color: #ffffff;
            padding: 0.9rem 2rem;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 8px;
            box-shadow: 0 4px 14px rgba(15, 82, 186, 0.3);
        }
        .btn-primary:hover {
            background-color: var(--primary-hover);
        }
        .btn-secondary {
            background-color: #f1f5f9;
            color: #334155;
            padding: 0.9rem 1.8rem;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 8px;
            border: 1px solid #cbd5e1;
        }
        .btn-secondary:hover {
            background-color: #e2e8f0;
        }
        .hero-metrics-pill {
            display: flex;
            gap: 1.75rem;
            border-top: 1px solid #e2e8f0;
            padding-top: 1.5rem;
        }
        .pill-item h4 {
            font-size: 1.4rem;
            font-weight: 700;
            color: #0f172a;
        }
        .pill-item p {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* Hero 右侧快捷入口网格 */
        .portal-grid-panel {
            background: #ffffff;
            border-radius: var(--radius-lg);
            padding: 2rem;
            border: 1px solid #e2e8f0;
            box-shadow: var(--shadow-lg);
            position: relative;
        }
        .portal-panel-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: #1e293b;
            margin-bottom: 1.25rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .portal-items {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1rem;
        }
        .portal-card {
            background: #f8fafc;
            border: 1px solid #e2e8f0;
            border-radius: var(--radius-md);
            padding: 1.25rem;
            transition: all 0.25s ease;
        }
        .portal-card:hover {
            transform: translateY(-3px);
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
            background: #ffffff;
        }
        .portal-icon {
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background: #eef2ff;
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            margin-bottom: 0.75rem;
        }
        .portal-card h5 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #0f172a;
            margin-bottom: 0.25rem;
        }
        .portal-card p {
            font-size: 0.8rem;
            color: #64748b;
            line-height: 1.4;
        }

        /* 统一板块样式 */
        .section-padding {
            padding: 5rem 0;
        }
        .section-alt {
            background-color: #ffffff;
            border-top: 1px solid #e2e8f0;
            border-bottom: 1px solid #e2e8f0;
        }
        .section-dark {
            background-color: var(--dark-bg);
            color: #ffffff;
        }
        .section-header {
            max-width: 720px;
            margin: 0 auto 3.5rem auto;
            text-align: center;
        }
        .badge-tag {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            color: var(--primary);
            background: rgba(15, 82, 186, 0.08);
            padding: 0.35rem 0.8rem;
            border-radius: 4px;
            margin-bottom: 0.75rem;
        }
        .section-header h2 {
            font-size: 2.15rem;
            color: #0f172a;
            margin-bottom: 1rem;
            letter-spacing: -0.02em;
        }
        .section-dark .section-header h2 {
            color: #ffffff;
        }
        .section-header p {
            color: var(--text-muted);
            font-size: 1rem;
            line-height: 1.75;
        }
        .section-dark .section-header p {
            color: #94a3b8;
        }

        /* 2. 全景指标看板 */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }
        .metric-card {
            background: #ffffff;
            border-radius: var(--radius-md);
            padding: 2rem 1.5rem;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            position: relative;
            overflow: hidden;
            transition: all 0.25s ease;
        }
        .metric-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary);
        }
        .metric-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
        }
        .metric-val {
            font-size: 2.4rem;
            font-weight: 800;
            color: #0f172a;
            display: flex;
            align-items: baseline;
            gap: 0.35rem;
            margin-bottom: 0.5rem;
        }
        .metric-unit {
            font-size: 1rem;
            color: var(--primary);
            font-weight: 600;
        }
        .metric-label {
            font-size: 0.95rem;
            font-weight: 700;
            color: #334155;
            margin-bottom: 0.5rem;
        }
        .metric-sub {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* 3. 优惠阶梯与选型套餐 */
        .tier-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
            align-items: stretch;
        }
        .tier-card {
            background: #ffffff;
            border-radius: var(--radius-lg);
            border: 1px solid #e2e8f0;
            padding: 2.5rem 2rem;
            display: flex;
            flex-direction: column;
            position: relative;
            transition: all 0.25s ease;
        }
        .tier-card.popular {
            border: 2px solid var(--primary);
            box-shadow: var(--shadow-lg);
            transform: scale(1.03);
            z-index: 2;
        }
        .popular-badge {
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            background: linear-gradient(90deg, var(--primary), #2563eb);
            color: #ffffff;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 0.3rem 1rem;
            border-radius: 20px;
            letter-spacing: 0.05em;
        }
        .tier-name {
            font-size: 1.25rem;
            font-weight: 700;
            color: #0f172a;
            margin-bottom: 0.5rem;
        }
        .tier-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
            min-height: 2.8rem;
            margin-bottom: 1.5rem;
        }
        .tier-price {
            display: flex;
            align-items: baseline;
            gap: 0.35rem;
            margin-bottom: 2rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px solid #f1f5f9;
        }
        .tier-price .amount {
            font-size: 2.2rem;
            font-weight: 800;
            color: #0f172a;
        }
        .tier-price .period {
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .tier-features {
            list-style: none;
            margin-bottom: 2rem;
            flex-grow: 1;
        }
        .tier-features li {
            font-size: 0.9rem;
            color: #334155;
            margin-bottom: 0.85rem;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .tier-features li i {
            color: var(--secondary);
            font-size: 0.85rem;
        }

        /* 4. 套餐横向对比表 */
        .comparison-table-wrapper {
            background: #ffffff;
            border-radius: var(--radius-lg);
            border: 1px solid #e2e8f0;
            overflow-x: auto;
            box-shadow: var(--shadow-sm);
        }
        .comp-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 780px;
        }
        .comp-table th, .comp-table td {
            padding: 1.2rem 1.5rem;
            border-bottom: 1px solid #f1f5f9;
            font-size: 0.9rem;
        }
        .comp-table th {
            background: #f8fafc;
            color: #1e293b;
            font-weight: 700;
        }
        .comp-table tr:hover td {
            background-color: #fafbfc;
        }
        .check-icon {
            color: var(--secondary);
            font-size: 1rem;
        }
        .cross-icon {
            color: #cbd5e1;
            font-size: 1rem;
        }

        /* 5. 技术底座与参数架构 */
        .arch-grid {
            display: grid;
            grid-template-columns: 1.1fr 1fr;
            gap: 3.5rem;
            align-items: center;
        }
        .arch-list {
            margin-top: 1.5rem;
        }
        .arch-item {
            margin-bottom: 1.5rem;
            padding-left: 1.25rem;
            border-left: 3px solid var(--primary);
        }
        .arch-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: #0f172a;
            margin-bottom: 0.35rem;
        }
        .arch-item p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.6;
        }
        .arch-visual-card {
            background: #ffffff;
            border-radius: var(--radius-lg);
            padding: 1rem;
            border: 1px solid #e2e8f0;
            box-shadow: var(--shadow-md);
        }
        .arch-visual-card img {
            border-radius: var(--radius-md);
            width: 100%;
            height: 380px;
            object-fit: cover;
        }

        /* 6. 六维核心优势矩阵 */
        .advantage-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.75rem;
        }
        .advantage-card {
            background: #ffffff;
            border-radius: var(--radius-md);
            padding: 2.2rem 1.75rem;
            border: 1px solid #e2e8f0;
            transition: all 0.25s ease;
        }
        .advantage-card:hover {
            transform: translateY(-4px);
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
        }
        .adv-num {
            font-size: 0.8rem;
            font-weight: 800;
            color: var(--primary);
            background: #eef2ff;
            display: inline-block;
            padding: 0.2rem 0.6rem;
            border-radius: 4px;
            margin-bottom: 1rem;
        }
        .advantage-card h3 {
            font-size: 1.15rem;
            color: #0f172a;
            margin-bottom: 0.75rem;
            font-weight: 700;
        }
        .advantage-card p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* 7. 爆款清单（热门教学套件） */
        .products-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }
        .product-card {
            background: #ffffff;
            border-radius: var(--radius-lg);
            border: 1px solid #e2e8f0;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            transition: all 0.25s ease;
        }
        .product-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .product-card img {
            width: 100%;
            height: 220px;
            object-fit: cover;
        }
        .product-body {
            padding: 1.75rem;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        .product-tag {
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--secondary);
            background: rgba(0, 168, 107, 0.1);
            padding: 0.25rem 0.6rem;
            border-radius: 4px;
            width: fit-content;
            margin-bottom: 0.75rem;
        }
        .product-body h3 {
            font-size: 1.2rem;
            color: #0f172a;
            margin-bottom: 0.75rem;
            font-weight: 700;
        }
        .product-body p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 1.25rem;
        }
        .product-bullets {
            list-style: none;
            margin-bottom: 1.5rem;
            flex-grow: 1;
        }
        .product-bullets li {
            font-size: 0.85rem;
            color: #475569;
            margin-bottom: 0.5rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .product-bullets li i {
            color: var(--primary);
            font-size: 0.75rem;
        }

        /* 8. 技术交付服务体系 */
        .pipeline-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }
        .pipeline-card {
            background: #ffffff;
            border: 1px solid #e2e8f0;
            border-radius: var(--radius-md);
            padding: 2rem 1.5rem;
            position: relative;
        }
        .pipe-step {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--primary);
            color: #ffffff;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.25rem;
            font-size: 0.9rem;
        }
        .pipeline-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: #0f172a;
            margin-bottom: 0.6rem;
        }
        .pipeline-card p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 9. 深色沉浸式教学理念与案例 */
        .dark-case-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3.5rem;
            align-items: center;
        }
        .dark-case-card {
            background: var(--dark-card);
            border-radius: var(--radius-lg);
            padding: 2.5rem;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .dark-case-card h3 {
            font-size: 1.45rem;
            color: #ffffff;
            margin-bottom: 1.25rem;
            font-weight: 700;
        }
        .dark-case-card p {
            font-size: 0.95rem;
            color: #94a3b8;
            line-height: 1.8;
            margin-bottom: 1.75rem;
        }
        .stat-badge-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.25rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 1.5rem;
        }
        .stat-badge-item h5 {
            font-size: 1.75rem;
            color: #38bdf8;
            font-weight: 800;
            margin-bottom: 0.2rem;
        }
        .stat-badge-item span {
            font-size: 0.82rem;
            color: #cbd5e1;
        }
        .dark-media-frame {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }
        .dark-media-frame img {
            width: 100%;
            height: 420px;
            object-fit: cover;
        }

        /* 10. 传统教学 vs AI教育平台对比 */
        .vs-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
        }
        .vs-card {
            border-radius: var(--radius-lg);
            padding: 2.5rem;
            border: 1px solid #e2e8f0;
        }
        .vs-card.traditional {
            background: #ffffff;
            border-top: 4px solid #ef4444;
        }
        .vs-card.ai-powered {
            background: #ffffff;
            border-top: 4px solid var(--secondary);
            box-shadow: var(--shadow-md);
        }
        .vs-card h3 {
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .vs-list {
            list-style: none;
        }
        .vs-list li {
            padding: 1rem 0;
            border-bottom: 1px solid #f1f5f9;
            font-size: 0.92rem;
            display: flex;
            gap: 0.8rem;
            line-height: 1.6;
        }
        .vs-list li:last-child {
            border-bottom: none;
        }
        .vs-list.bad li i {
            color: #ef4444;
            font-size: 1.1rem;
            margin-top: 0.2rem;
        }
        .vs-list.good li i {
            color: var(--secondary);
            font-size: 1.1rem;
            margin-top: 0.2rem;
        }

        /* 11. 里程碑时间线 */
        .timeline-wrapper {
            position: relative;
            max-width: 960px;
            margin: 0 auto;
        }
        .timeline-wrapper::before {
            content: '';
            position: absolute;
            top: 0;
            bottom: 0;
            left: 50%;
            width: 2px;
            background: #e2e8f0;
            transform: translateX(-50%);
        }
        .timeline-node {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 3rem;
            position: relative;
        }
        .timeline-node:nth-child(even) {
            flex-direction: row-reverse;
        }
        .timeline-content {
            width: 44%;
            background: #ffffff;
            padding: 1.75rem;
            border-radius: var(--radius-md);
            border: 1px solid #e2e8f0;
            box-shadow: var(--shadow-sm);
        }
        .timeline-date {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 0.4rem;
        }
        .timeline-content h4 {
            font-size: 1.1rem;
            color: #0f172a;
            margin-bottom: 0.5rem;
            font-weight: 700;
        }
        .timeline-content p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
        }
        .timeline-dot {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: #ffffff;
            border: 4px solid var(--primary);
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            z-index: 2;
        }

        /* 12. 评价墙 */
        .review-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.75rem;
        }
        .review-card {
            background: #ffffff;
            border-radius: var(--radius-md);
            padding: 2rem;
            border: 1px solid #e2e8f0;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            box-shadow: var(--shadow-sm);
        }
        .review-stars {
            color: #fbbf24;
            font-size: 0.85rem;
            margin-bottom: 1rem;
        }
        .review-text {
            font-size: 0.92rem;
            color: #334155;
            line-height: 1.7;
            margin-bottom: 1.5rem;
            font-style: italic;
        }
        .reviewer-meta {
            display: flex;
            align-items: center;
            gap: 0.85rem;
            border-top: 1px solid #f1f5f9;
            padding-top: 1.25rem;
        }
        .reviewer-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: #e2e8f0;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #64748b;
            font-weight: 700;
        }
        .reviewer-info h5 {
            font-size: 0.95rem;
            color: #0f172a;
            font-weight: 700;
        }
        .reviewer-info span {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* 13. 保障图标条 */
        .trust-strip {
            background: #ffffff;
            padding: 2.5rem 0;
            border-top: 1px solid #e2e8f0;
            border-bottom: 1px solid #e2e8f0;
        }
        .trust-grid {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 1.5rem;
            align-items: center;
            text-align: center;
        }
        .trust-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 0.6rem;
        }
        .trust-icon {
            font-size: 1.75rem;
            color: var(--primary);
        }
        .trust-item span {
            font-size: 0.82rem;
            font-weight: 600;
            color: #475569;
        }

        /* 14. 资讯摘要列表 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }
        .news-card {
            background: #ffffff;
            border-radius: var(--radius-md);
            padding: 1.75rem;
            border: 1px solid #e2e8f0;
            display: flex;
            flex-direction: column;
            transition: all 0.25s ease;
        }
        .news-card:hover {
            transform: translateY(-4px);
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
        }
        .news-date {
            font-size: 0.78rem;
            color: var(--text-muted);
            margin-bottom: 0.6rem;
            display: flex;
            justify-content: space-between;
        }
        .news-card h3 {
            font-size: 1.05rem;
            color: #0f172a;
            margin-bottom: 0.75rem;
            font-weight: 700;
            line-height: 1.45;
        }
        .news-card p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 1.25rem;
            flex-grow: 1;
        }
        .news-link {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
        }

        /* 15. FAQ 手风琴 */
        .faq-layout {
            display: grid;
            grid-template-columns: 1fr 1.6fr;
            gap: 3.5rem;
        }
        .faq-intro-card {
            background: #ffffff;
            border-radius: var(--radius-lg);
            padding: 2.5rem;
            border: 1px solid #e2e8f0;
            height: fit-content;
        }
        .faq-intro-card h3 {
            font-size: 1.35rem;
            color: #0f172a;
            margin-bottom: 1rem;
            font-weight: 700;
        }
        .faq-intro-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 1.5rem;
        }
        .faq-accordion {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        details.faq-item {
            background: #ffffff;
            border-radius: var(--radius-md);
            border: 1px solid #e2e8f0;
            overflow: hidden;
            transition: all 0.25s ease;
        }
        details.faq-item[open] {
            border-color: var(--primary);
            box-shadow: var(--shadow-sm);
        }
        summary.faq-header {
            padding: 1.25rem 1.5rem;
            font-size: 1rem;
            font-weight: 700;
            color: #0f172a;
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        summary.faq-header::-webkit-details-marker {
            display: none;
        }
        summary.faq-header::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 0.85rem;
            color: var(--primary);
            transition: transform 0.25s ease;
        }
        details.faq-item[open] summary.faq-header::after {
            transform: rotate(180deg);
        }
        .faq-body {
            padding: 0 1.5rem 1.25rem 1.5rem;
            font-size: 0.88rem;
            color: #475569;
            line-height: 1.75;
            border-top: 1px solid #f8fafc;
        }

        /* 16. 加购与转化收口表单 (Bottom CTA) */
        .bottom-cta-section {
            background: linear-gradient(135deg, #0A1128 0%, #172554 100%);
            color: #ffffff;
            padding: 5rem 0;
            position: relative;
        }
        .cta-box-grid {
            display: grid;
            grid-template-columns: 1fr 1.1fr;
            gap: 4rem;
            align-items: center;
        }
        .cta-info h2 {
            font-size: 2.35rem;
            line-height: 1.3;
            margin-bottom: 1.25rem;
            font-weight: 800;
        }
        .cta-info p {
            font-size: 1.05rem;
            color: #94a3b8;
            margin-bottom: 2rem;
            line-height: 1.75;
        }
        .cta-badges {
            display: flex;
            gap: 1.5rem;
        }
        .cta-badge-item {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.88rem;
            color: #cbd5e1;
        }
        .cta-form-container {
            background: #ffffff;
            border-radius: var(--radius-lg);
            padding: 2.5rem;
            color: #1e293b;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
        }
        .cta-form-container h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: #0f172a;
            margin-bottom: 0.5rem;
        }
        .cta-form-container p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 1.5rem;
        }
        .form-group {
            margin-bottom: 1.25rem;
        }
        .form-label {
            display: block;
            font-size: 0.85rem;
            font-weight: 600;
            color: #334155;
            margin-bottom: 0.4rem;
        }
        .form-control {
            width: 100%;
            padding: 0.8rem 1rem;
            border-radius: 8px;
            border: 1px solid #cbd5e1;
            font-size: 0.9rem;
            outline: none;
            transition: all 0.25s ease;
        }
        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(15, 82, 186, 0.15);
        }
        .form-select {
            width: 100%;
            padding: 0.8rem 1rem;
            border-radius: 8px;
            border: 1px solid #cbd5e1;
            font-size: 0.9rem;
            background-color: #ffffff;
            outline: none;
        }
        .form-submit-btn {
            width: 100%;
            background: var(--primary);
            color: #ffffff;
            border: none;
            padding: 0.95rem;
            font-size: 1rem;
            font-weight: 700;
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.25s ease;
            box-shadow: 0 4px 12px rgba(15, 82, 186, 0.3);
        }
        .form-submit-btn:hover {
            background: var(--primary-hover);
        }
        .form-privacy-note {
            font-size: 0.75rem;
            color: #94a3b8;
            text-align: center;
            margin-top: 0.85rem;
        }

        /* 页脚规范设计 */
        .site-footer {
            background-color: #070d1e;
            color: #94a3b8;
            padding: 4.5rem 0 2rem 0;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.88rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 3rem;
            margin-bottom: 3.5rem;
        }
        .footer-brand h4 {
            color: #ffffff;
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .footer-brand p {
            line-height: 1.7;
            margin-bottom: 1.25rem;
            font-size: 0.85rem;
        }
        .footer-col h5 {
            color: #ffffff;
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 1.2rem;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 0.65rem;
        }
        .footer-links a:hover {
            color: #ffffff;
        }
        .footer-contact li {
            display: flex;
            align-items: flex-start;
            gap: 0.6rem;
            margin-bottom: 0.75rem;
            line-height: 1.5;
        }
        .footer-contact i {
            color: var(--primary);
            margin-top: 0.25rem;
        }
        .footer-bottom {
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 1rem;
            font-size: 0.8rem;
        }
        .footer-icp {
            display: flex;
            align-items: center;
            gap: 1.5rem;
        }

        /* 移动端菜单抽屉 */
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: #1e293b;
            cursor: pointer;
        }

        /* 响应式断点 */
        @media (max-width: 1024px) {
            .hero-grid, .cta-box-grid, .arch-grid, .dark-case-grid, .faq-layout {
                grid-template-columns: 1fr;
                gap: 2.5rem;
            }
            .metrics-grid, .advantage-grid, .pipeline-grid, .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .trust-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .timeline-wrapper::before {
                left: 20px;
            }
            .timeline-node, .timeline-node:nth-child(even) {
                flex-direction: row;
                justify-content: flex-start;
            }
            .timeline-dot {
                left: 20px;
            }
            .timeline-content {
                width: calc(100% - 50px);
                margin-left: 50px;
            }
        }

        @media (max-width: 768px) {
            .nav-links, .top-bar-info {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .tier-grid, .products-grid, .vs-grid, .review-grid {
                grid-template-columns: 1fr;
            }
            h1.hero-title {
                font-size: 2.1rem;
            }
            .portal-items {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }