/* roulang page: index */
:root {
            --primary: #0F4C81;
            --primary-dark: #0A3257;
            --primary-light: #E8F1F8;
            --accent: #0284C7;
            --accent-warm: #D97706;
            --text-main: #1E293B;
            --text-muted: #64748B;
            --text-light: #94A3B8;
            --bg-body: #F8FAFC;
            --bg-white: #FFFFFF;
            --bg-alt: #F1F5F9;
            --bg-dark: #0B192C;
            --border: #E2E8F0;
            --border-hover: #CBD5E1;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 6px -1px rgba(15, 76, 129, 0.08), 0 2px 4px -2px rgba(15, 76, 129, 0.06);
            --shadow-lg: 0 10px 25px -5px rgba(15, 76, 129, 0.1), 0 8px 10px -6px rgba(15, 76, 129, 0.06);
            --shadow-xl: 0 20px 30px -8px rgba(15, 76, 129, 0.14);
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-body);
            color: var(--text-main);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

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

        ul, ol {
            list-style: none;
        }

        button, input, select, textarea {
            font: inherit;
        }

        .container {
            width: 100%;
            max-width: 1240px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        /* 顶部辅助条 */
        .top-bar {
            background-color: #0A192F;
            color: #94A3B8;
            font-size: 0.8125rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            padding: 0.5rem 0;
        }
        .top-bar-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .top-bar-info span {
            margin-right: 1.5rem;
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
        }
        .top-bar-tags {
            display: flex;
            gap: 1rem;
        }
        .top-badge {
            background-color: rgba(2, 132, 199, 0.18);
            color: #38BDF8;
            padding: 0.125rem 0.5rem;
            border-radius: var(--radius-sm);
            font-size: 0.75rem;
        }

        /* 导航栏 */
        .header-sticky {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
        }
        .header-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #ffffff;
            font-size: 1.25rem;
            box-shadow: 0 4px 10px rgba(15, 76, 129, 0.25);
        }
        .logo-text {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.02em;
        }
        .logo-sub {
            font-size: 0.75rem;
            color: var(--text-muted);
            display: block;
            margin-top: -2px;
            font-weight: 500;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 1.75rem;
        }
        .nav-link {
            font-size: 0.9375rem;
            font-weight: 500;
            color: var(--text-main);
            position: relative;
            padding: 0.5rem 0;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--accent);
            transition: var(--transition);
        }
        .nav-link:hover::after, .nav-link.active::after {
            width: 100%;
        }
        .nav-cta {
            background-color: var(--primary);
            color: #ffffff;
            padding: 0.625rem 1.25rem;
            border-radius: var(--radius-md);
            font-size: 0.875rem;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            box-shadow: 0 4px 12px rgba(15, 76, 129, 0.2);
        }
        .nav-cta:hover {
            background-color: var(--primary-dark);
            transform: translateY(-1px);
        }
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-main);
            cursor: pointer;
        }

        /* 统一 Section 通用样式 */
        .section-padding {
            padding: 5rem 0;
        }
        .section-header {
            max-width: 780px;
            margin: 0 auto 3.5rem auto;
            text-align: center;
        }
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            background-color: var(--primary-light);
            color: var(--primary);
            font-size: 0.8125rem;
            font-weight: 600;
            padding: 0.3rem 0.85rem;
            border-radius: 999px;
            margin-bottom: 0.85rem;
            letter-spacing: 0.03em;
        }
        .section-title {
            font-size: 2.125rem;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.3;
            margin-bottom: 1rem;
            letter-spacing: -0.02em;
        }
        .section-desc {
            font-size: 1.05rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* 按钮通用 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.85rem 1.75rem;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: var(--transition);
            min-height: 48px;
        }
        .btn-primary {
            background-color: var(--primary);
            color: #ffffff;
            border: 1px solid var(--primary);
            box-shadow: 0 4px 14px rgba(15, 76, 129, 0.25);
        }
        .btn-primary:hover {
            background-color: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(15, 76, 129, 0.3);
        }
        .btn-secondary {
            background-color: #ffffff;
            color: var(--primary);
            border: 1px solid var(--border);
        }
        .btn-secondary:hover {
            border-color: var(--primary);
            background-color: var(--primary-light);
            transform: translateY(-2px);
        }

        /* 1. Hero 区 */
        .hero-section {
            position: relative;
            background-color: #07192C;
            color: #ffffff;
            padding: 5.5rem 0 4.5rem 0;
            overflow: hidden;
        }
        .hero-bg-overlay {
            position: absolute;
            inset: 0;
            background-image: linear-gradient(135deg, rgba(7, 25, 44, 0.92) 0%, rgba(15, 76, 129, 0.82) 100%), url('/assets/images/8e28419d9df337b0.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.65;
            z-index: 1;
        }
        .hero-container {
            position: relative;
            z-index: 2;
        }
        .hero-content {
            max-width: 860px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(2, 132, 199, 0.25);
            border: 1px solid rgba(56, 189, 248, 0.35);
            color: #7DD3FC;
            padding: 0.35rem 0.95rem;
            border-radius: 999px;
            font-size: 0.8125rem;
            font-weight: 600;
            margin-bottom: 1.5rem;
        }
        .hero-title {
            font-size: 2.75rem;
            font-weight: 800;
            line-height: 1.22;
            margin-bottom: 1.25rem;
            color: #ffffff;
            letter-spacing: -0.03em;
        }
        .hero-subtitle {
            font-size: 1.125rem;
            line-height: 1.75;
            color: #CBD5E1;
            margin-bottom: 2rem;
            max-width: 760px;
        }
        .hero-selling-points {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1rem;
            margin-bottom: 2.5rem;
            max-width: 700px;
        }
        .selling-item {
            display: flex;
            align-items: center;
            gap: 0.65rem;
            color: #E2E8F0;
            font-size: 0.95rem;
        }
        .selling-item i {
            color: #38BDF8;
            font-size: 1rem;
        }
        .hero-actions {
            display: flex;
            gap: 1.25rem;
            align-items: center;
            margin-bottom: 3.5rem;
        }
        .hero-trust-bar {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 2rem;
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.15);
        }
        .trust-item {
            display: flex;
            align-items: center;
            gap: 0.65rem;
            color: #94A3B8;
            font-size: 0.85rem;
        }
        .trust-item i {
            color: #0284C7;
            font-size: 1.15rem;
        }

        /* 2. 优惠阶梯 (批采与选型阶梯) */
        .tier-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }
        .tier-card {
            background-color: var(--bg-white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            padding: 2rem 1.5rem;
            position: relative;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .tier-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            border-color: var(--accent);
        }
        .tier-popular {
            border: 2px solid var(--primary);
            box-shadow: var(--shadow-md);
        }
        .tier-badge {
            position: absolute;
            top: -12px;
            right: 1.5rem;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #ffffff;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 0.2rem 0.75rem;
            border-radius: 999px;
            letter-spacing: 0.05em;
        }
        .tier-phase {
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 0.5rem;
        }
        .tier-title {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 0.75rem;
        }
        .tier-vol {
            font-size: 1.65rem;
            font-weight: 800;
            color: var(--primary-dark);
            margin-bottom: 1rem;
            display: flex;
            align-items: baseline;
            gap: 0.25rem;
        }
        .tier-vol small {
            font-size: 0.875rem;
            font-weight: 500;
            color: var(--text-muted);
        }
        .tier-desc {
            font-size: 0.875rem;
            color: var(--text-muted);
            margin-bottom: 1.5rem;
            line-height: 1.6;
            min-height: 56px;
        }
        .tier-list {
            margin-bottom: 1.75rem;
            flex-grow: 1;
        }
        .tier-list li {
            display: flex;
            align-items: flex-start;
            gap: 0.5rem;
            font-size: 0.85rem;
            color: var(--text-main);
            margin-bottom: 0.65rem;
        }
        .tier-list li i {
            color: var(--accent);
            margin-top: 3px;
        }

        /* 3. 套餐对比 (工规与车规矩阵对比) */
        .matrix-table-wrap {
            background-color: var(--bg-white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        .matrix-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
        }
        .matrix-table th, .matrix-table td {
            padding: 1.25rem 1.5rem;
            border-bottom: 1px solid var(--border);
        }
        .matrix-table th {
            background-color: #F8FAFC;
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-main);
        }
        .matrix-table td {
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .matrix-table tr:last-child td {
            border-bottom: none;
        }
        .matrix-table tr:hover td {
            background-color: #F1F5F9;
        }
        .param-name {
            font-weight: 600;
            color: var(--text-main);
        }
        .highlight-col {
            background-color: rgba(15, 76, 129, 0.03);
            font-weight: 600;
            color: var(--primary) !important;
        }

        /* 4. 限时入口 (样片直通通道) */
        .fast-track-box {
            background: linear-gradient(135deg, #0F4C81 0%, #0284C7 100%);
            border-radius: var(--radius-xl);
            padding: 3.5rem;
            color: #ffffff;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .fast-track-grid {
            display: grid;
            grid-template-columns: 1.3fr 0.7fr;
            gap: 2.5rem;
            align-items: center;
        }
        .fast-track-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 1rem;
            line-height: 1.3;
        }
        .fast-track-desc {
            font-size: 1rem;
            line-height: 1.7;
            color: #E0F2FE;
            margin-bottom: 1.5rem;
        }
        .fast-track-perks {
            display: flex;
            gap: 1.5rem;
        }
        .perk-item {
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(8px);
            padding: 0.75rem 1.25rem;
            border-radius: var(--radius-md);
            font-size: 0.875rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .fast-track-action {
            text-align: right;
        }

        /* 5. 爆款清单 (旗舰产品矩阵) */
        .product-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }
        .product-card {
            background-color: var(--bg-white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .product-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-xl);
            border-color: var(--primary);
        }
        .product-img-wrap {
            height: 220px;
            position: relative;
            overflow: hidden;
            background-color: #E2E8F0;
        }
        .product-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .product-card:hover .product-img-wrap img {
            transform: scale(1.05);
        }
        .product-tag-float {
            position: absolute;
            top: 1rem;
            left: 1rem;
            background-color: rgba(15, 76, 129, 0.9);
            color: #ffffff;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.25rem 0.65rem;
            border-radius: var(--radius-sm);
            backdrop-filter: blur(4px);
        }
        .product-body {
            padding: 1.75rem;
            display: flex;
            flex-direction: column;
            flex-grow: 1;
        }
        .product-title {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 0.5rem;
        }
        .product-brief {
            font-size: 0.875rem;
            color: var(--text-muted);
            margin-bottom: 1.25rem;
            line-height: 1.6;
        }
        .spec-list {
            background-color: var(--bg-alt);
            border-radius: var(--radius-md);
            padding: 0.85rem 1rem;
            margin-bottom: 1.5rem;
        }
        .spec-row {
            display: flex;
            justify-content: space-between;
            font-size: 0.8125rem;
            padding: 0.3rem 0;
            border-bottom: 1px dashed var(--border);
        }
        .spec-row:last-child {
            border-bottom: none;
        }
        .spec-label {
            color: var(--text-muted);
        }
        .spec-val {
            color: var(--text-main);
            font-weight: 600;
        }
        .product-action {
            margin-top: auto;
        }

        /* 6. 核心研发与制造测试理念 (深色工业视觉) */
        .dark-tech-section {
            background-color: var(--bg-dark);
            color: #ffffff;
            position: relative;
            overflow: hidden;
        }
        .dark-tech-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
            align-items: center;
        }
        .process-flow {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }
        .process-step {
            display: flex;
            gap: 1.25rem;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            padding: 1.25rem;
            transition: var(--transition);
        }
        .process-step:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: var(--accent);
            transform: translateX(6px);
        }
        .step-num {
            width: 44px;
            height: 44px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.125rem;
            flex-shrink: 0;
        }
        .step-body h4 {
            font-size: 1.05rem;
            margin-bottom: 0.35rem;
            color: #ffffff;
        }
        .step-body p {
            font-size: 0.875rem;
            color: #94A3B8;
            line-height: 1.55;
        }
        .tech-visual-frame {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.15);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
        }

        /* 7. 典型行业应用场景 */
        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }
        .scenario-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 1.75rem 1.25rem;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .scenario-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
            border-color: var(--accent);
        }
        .scenario-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-md);
            background-color: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.35rem;
            margin-bottom: 1.25rem;
        }
        .scenario-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 0.5rem;
        }
        .scenario-text {
            font-size: 0.875rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 1rem;
        }
        .scenario-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.35rem;
        }
        .scenario-badge {
            font-size: 0.75rem;
            background-color: var(--bg-alt);
            color: var(--primary);
            padding: 0.2rem 0.5rem;
            border-radius: var(--radius-sm);
            font-weight: 500;
        }

        /* 8. 关键数据统计条 */
        .metric-strip-section {
            background: linear-gradient(135deg, #0F4C81, #093359);
            color: #ffffff;
            padding: 3.5rem 0;
        }
        .metric-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            text-align: center;
        }
        .metric-item {
            padding: 1rem;
            border-right: 1px solid rgba(255, 255, 255, 0.12);
        }
        .metric-item:last-child {
            border-right: none;
        }
        .metric-number {
            font-size: 2.75rem;
            font-weight: 800;
            color: #38BDF8;
            margin-bottom: 0.35rem;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
        }
        .metric-label {
            font-size: 1.05rem;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 0.25rem;
        }
        .metric-sub {
            font-size: 0.8125rem;
            color: #94A3B8;
        }

        /* 9. 评价墙 (工程客户评价) */
        .review-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }
        .review-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 2rem;
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            transition: var(--transition);
        }
        .review-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .review-rating {
            color: var(--accent-warm);
            margin-bottom: 1rem;
            font-size: 0.875rem;
        }
        .review-quote {
            font-size: 0.9375rem;
            color: var(--text-main);
            line-height: 1.65;
            margin-bottom: 1.5rem;
            font-style: normal;
        }
        .review-author {
            display: flex;
            align-items: center;
            gap: 0.85rem;
            border-top: 1px solid var(--border);
            padding-top: 1rem;
        }
        .author-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background-color: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1rem;
        }
        .author-name {
            font-size: 0.9375rem;
            font-weight: 700;
            color: var(--text-main);
        }
        .author-title {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        /* 10. 保障图标条 */
        .guarantee-bar {
            background-color: var(--bg-white);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            padding: 3rem 0;
        }
        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
        }
        .guarantee-item {
            display: flex;
            align-items: center;
            gap: 1.25rem;
        }
        .guarantee-icon {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background-color: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            flex-shrink: 0;
        }
        .guarantee-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 0.25rem;
        }
        .guarantee-text {
            font-size: 0.8125rem;
            color: var(--text-muted);
            line-height: 1.4;
        }

        /* 11. 资讯 (技术应用与白皮书) */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }
        .news-card {
            background-color: var(--bg-white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
        }
        .news-img {
            height: 190px;
            overflow: hidden;
            background-color: #E2E8F0;
        }
        .news-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .news-card:hover .news-img img {
            transform: scale(1.06);
        }
        .news-body {
            padding: 1.5rem;
            display: flex;
            flex-direction: column;
            flex-grow: 1;
        }
        .news-meta {
            display: flex;
            align-items: center;
            gap: 0.85rem;
            font-size: 0.75rem;
            color: var(--text-muted);
            margin-bottom: 0.65rem;
        }
        .news-category {
            color: var(--primary);
            font-weight: 600;
        }
        .news-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 0.75rem;
            line-height: 1.4;
        }
        .news-desc {
            font-size: 0.875rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 1.25rem;
            flex-grow: 1;
        }
        .news-link {
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
        }

        /* 12. 加购引导与定制咨询表单 (CTA) */
        .cta-section {
            background-color: var(--bg-alt);
        }
        .cta-card-box {
            background-color: var(--bg-white);
            border-radius: var(--radius-xl);
            border: 1px solid var(--border);
            padding: 3.5rem;
            box-shadow: var(--shadow-xl);
        }
        .cta-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3.5rem;
        }
        .cta-left h3 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 1rem;
            line-height: 1.3;
        }
        .cta-left p {
            font-size: 1rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 2rem;
        }
        .contact-channel {
            display: flex;
            flex-direction: column;
            gap: 1.25rem;
        }
        .channel-item {
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        .channel-icon {
            width: 44px;
            height: 44px;
            border-radius: var(--radius-md);
            background-color: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.15rem;
        }
        .channel-text strong {
            display: block;
            font-size: 0.9375rem;
            color: var(--text-main);
        }
        .channel-text span {
            font-size: 0.8125rem;
            color: var(--text-muted);
        }
        .cta-form {
            display: flex;
            flex-direction: column;
            gap: 1.25rem;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 0.4rem;
        }
        .form-label {
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--text-main);
        }
        .form-control {
            height: 46px;
            padding: 0 1rem;
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            background-color: var(--bg-white);
            font-size: 0.9rem;
            color: var(--text-main);
            outline: none;
            transition: var(--transition);
        }
        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(15, 76, 129, 0.15);
        }
        textarea.form-control {
            height: 90px;
            padding: 0.75rem 1rem;
            resize: vertical;
        }

        /* 页脚 Footer */
        .footer-site {
            background-color: #0B192C;
            color: #94A3B8;
            padding: 5rem 0 2rem 0;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 3rem;
            margin-bottom: 4rem;
        }
        .footer-brand .logo-text {
            color: #ffffff;
            font-size: 1.35rem;
        }
        .footer-desc {
            font-size: 0.875rem;
            line-height: 1.7;
            margin: 1.25rem 0;
            color: #94A3B8;
        }
        .footer-domain-note {
            font-size: 0.8125rem;
            color: #64748B;
        }
        .footer-col h4 {
            color: #ffffff;
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 1.25rem;
            position: relative;
        }
        .footer-links li {
            margin-bottom: 0.75rem;
        }
        .footer-links a {
            font-size: 0.875rem;
            color: #94A3B8;
        }
        .footer-links a:hover {
            color: #38BDF8;
            padding-left: 4px;
        }
        .footer-contact li {
            font-size: 0.875rem;
            margin-bottom: 0.85rem;
            display: flex;
            align-items: flex-start;
            gap: 0.75rem;
            color: #94A3B8;
        }
        .footer-contact i {
            color: #38BDF8;
            margin-top: 3px;
        }
        .footer-bottom {
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.8125rem;
            flex-wrap: wrap;
            gap: 1rem;
        }
        .footer-bottom a {
            color: #94A3B8;
        }
        .footer-bottom a:hover {
            color: #ffffff;
        }

        /* 响应式断点控制 */
        @media (max-width: 1024px) {
            .hero-title {
                font-size: 2.25rem;
            }
            .tier-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .product-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .scenarios-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .metric-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .metric-item:nth-child(2) {
                border-right: none;
            }
            .guarantee-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 2.5rem;
            }
            .dark-tech-grid {
                grid-template-columns: 1fr;
            }
            .cta-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .top-bar {
                display: none;
            }
            .nav-links, .nav-cta {
                display: none;
            }
            .mobile-menu-btn {
                display: block;
            }
            .hero-section {
                padding: 3.5rem 0 3rem 0;
            }
            .hero-title {
                font-size: 1.85rem;
            }
            .hero-selling-points {
                grid-template-columns: 1fr;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .fast-track-grid {
                grid-template-columns: 1fr;
            }
            .fast-track-action {
                text-align: left;
            }
            .fast-track-box {
                padding: 2rem;
            }
            .product-grid {
                grid-template-columns: 1fr;
            }
            .review-grid {
                grid-template-columns: 1fr;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .cta-card-box {
                padding: 2rem 1.5rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .matrix-table-wrap {
                overflow-x: auto;
            }
            .matrix-table {
                min-width: 600px;
            }
        }

        @media (max-width: 520px) {
            .tier-grid {
                grid-template-columns: 1fr;
            }
            .scenarios-grid {
                grid-template-columns: 1fr;
            }
            .metric-grid {
                grid-template-columns: 1fr;
            }
            .metric-item {
                border-right: none;
                border-bottom: 1px solid rgba(255, 255, 255, 0.12);
            }
            .guarantee-grid {
                grid-template-columns: 1fr;
            }
        }

        /* 移动端菜单抽屉 */
        .mobile-drawer {
            display: none;
            position: fixed;
            top: 72px;
            left: 0;
            width: 100%;
            background-color: #ffffff;
            box-shadow: var(--shadow-lg);
            border-bottom: 1px solid var(--border);
            padding: 1.5rem;
            z-index: 999;
        }
        .mobile-drawer.active {
            display: block;
        }
        .mobile-nav-item {
            display: block;
            padding: 0.75rem 0;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-main);
            border-bottom: 1px solid var(--border);
        }
        .mobile-nav-item:last-child {
            border-bottom: none;
        }