/* roulang page: index */
:root {
            --primary: #0f172a;
            --primary-light: #1e293b;
            --accent: #0ea5e9;
            --accent-glow: #38bdf8;
            --highlight: #f59e0b;
            --success: #10b981;
            --bg-base: #f8fafc;
            --bg-surface: #ffffff;
            --text-main: #0f172a;
            --text-muted: #64748b;
            --border-color: #e2e8f0;
            --border-subtle: rgba(226, 232, 240, 0.8);
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
            --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.05), 0 2px 4px -1px rgba(0,0,0,0.03);
            --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.08);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
            background-color: var(--bg-base);
            color: var(--text-main);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

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

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

        .container {
            width: 100%;
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 顶部导航 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
        }

        .top-bar {
            background: var(--primary);
            color: #94a3b8;
            font-size: 13px;
            padding: 6px 0;
        }

        .top-bar-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .top-info span {
            margin-right: 20px;
        }

        .main-nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 72px;
        }

        .nav-logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: -0.5px;
        }

        .nav-logo .badge-tag {
            background: var(--accent);
            color: #fff;
            font-size: 11px;
            font-weight: 600;
            padding: 2px 8px;
            border-radius: 4px;
        }

        .nav-links {
            display: flex;
            gap: 32px;
            list-style: none;
        }

        .nav-links a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-main);
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        /* 按钮体系 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 22px;
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition);
            border: 1px solid transparent;
            gap: 8px;
        }

        .btn-primary {
            background: var(--accent);
            color: #ffffff;
            box-shadow: 0 4px 12px rgba(14, 165, 233, 0.3);
        }

        .btn-primary:hover {
            background: #0284c7;
            transform: translateY(-2px);
        }

        .btn-highlight {
            background: var(--highlight);
            color: #ffffff;
            box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
        }

        .btn-highlight:hover {
            background: #d97706;
            transform: translateY(-2px);
        }

        .btn-outline {
            border-color: var(--border-color);
            background: #ffffff;
            color: var(--text-main);
        }

        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
        }

        .btn-dark {
            background: var(--primary);
            color: #ffffff;
        }

        .btn-dark:hover {
            background: var(--primary-light);
        }

        /* 通用板式 */
        .section-padding {
            padding: 80px 0;
        }

        .section-header {
            text-align: center;
            max-width: 760px;
            margin: 0 auto 50px;
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            text-transform: uppercase;
            color: var(--accent);
            letter-spacing: 1px;
            margin-bottom: 12px;
            background: rgba(14, 165, 233, 0.1);
            padding: 4px 12px;
            border-radius: 20px;
        }

        .section-title {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--primary);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .section-desc {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.8;
        }

        /* 1. 秒杀与首屏 Hero */
        .hero-section {
            background: linear-gradient(135deg, #090d16 0%, #111827 100%);
            color: #ffffff;
            padding: 50px 0 70px;
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }

        .flash-bar {
            background: rgba(245, 158, 11, 0.15);
            border: 1px solid rgba(245, 158, 11, 0.3);
            border-radius: var(--radius-md);
            padding: 12px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 36px;
        }

        .flash-info {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 14px;
            font-weight: 600;
            color: #fef3c7;
        }

        .flash-badge {
            background: var(--highlight);
            color: #fff;
            padding: 3px 8px;
            border-radius: 4px;
            font-size: 12px;
        }

        .countdown-timer {
            display: flex;
            align-items: center;
            gap: 6px;
            font-family: monospace;
            font-weight: bold;
        }

        .time-box {
            background: #000;
            padding: 4px 8px;
            border-radius: 4px;
            color: #f59e0b;
            font-size: 15px;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 40px;
            align-items: center;
        }

        .hero-content h1 {
            font-size: 42px;
            font-weight: 900;
            line-height: 1.25;
            margin-bottom: 20px;
            letter-spacing: -0.8px;
        }

        .hero-content h1 span {
            color: var(--accent-glow);
        }

        .hero-lead {
            font-size: 16px;
            color: #94a3b8;
            margin-bottom: 30px;
            line-height: 1.8;
        }

        .hero-features {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 15px;
            margin-bottom: 35px;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.1);
        }

        .hero-f-item h4 {
            font-size: 18px;
            color: #fff;
            margin-bottom: 4px;
        }

        .hero-f-item p {
            font-size: 13px;
            color: #64748b;
        }

        .hero-card-stage {
            background: rgba(30, 41, 59, 0.7);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.4);
            position: relative;
        }

        .stage-image {
            border-radius: var(--radius-md);
            overflow: hidden;
            margin-bottom: 20px;
            height: 260px;
        }

        .stage-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .stage-meta {
            display: flex;
            justify-content: space-between;
            align-items: flex-end;
        }

        .stage-title {
            font-size: 20px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 6px;
        }

        .stage-sub {
            font-size: 13px;
            color: #94a3b8;
        }

        .stage-pricing {
            text-align: right;
        }

        .price-tag {
            font-size: 22px;
            font-weight: 800;
            color: var(--highlight);
        }

        /* 2. 优惠阶梯板块 */
        .tier-section {
            background: #ffffff;
        }

        .tier-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

        .tier-card {
            background: var(--bg-base);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 30px;
            position: relative;
            transition: var(--transition);
        }

        .tier-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            border-color: var(--accent);
        }

        .tier-level {
            font-size: 13px;
            font-weight: 700;
            color: var(--accent);
            text-transform: uppercase;
            margin-bottom: 10px;
        }

        .tier-name {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .tier-desc {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 20px;
            min-height: 48px;
        }

        .tier-incentive {
            background: #ffffff;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            border-left: 3px solid var(--accent);
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 20px;
        }

        /* 3. 套餐对比矩阵 */
        .compare-section {
            background: #f1f5f9;
        }

        .compare-table-wrapper {
            background: #ffffff;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            font-size: 14px;
        }

        .compare-table th, .compare-table td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--border-color);
        }

        .compare-table th {
            background: #f8fafc;
            font-weight: 700;
            color: var(--primary);
        }

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

        .compare-table tr:hover td {
            background: #fcfcfd;
        }

        .badge-check {
            color: var(--success);
            font-weight: bold;
        }

        /* 4. 限时入口板块 */
        .limited-entry-section {
            background: linear-gradient(rgba(15, 23, 42, 0.92), rgba(15, 23, 42, 0.92)), url('/assets/images/ff508d2b87b8a1f9.webp') center/cover no-repeat;
            color: #ffffff;
            text-align: center;
        }

        .entry-box {
            max-width: 800px;
            margin: 0 auto;
            border: 1px solid rgba(255,255,255,0.2);
            padding: 40px;
            border-radius: var(--radius-lg);
            background: rgba(30, 41, 59, 0.6);
            backdrop-filter: blur(8px);
        }

        .entry-box h2 {
            font-size: 30px;
            font-weight: 800;
            margin-bottom: 15px;
            color: #ffffff;
        }

        .entry-box p {
            font-size: 15px;
            color: #cbd5e1;
            margin-bottom: 25px;
        }

        /* 5. 爆款清单（3大主力机型） */
        .products-section {
            background: #ffffff;
        }

        .product-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .product-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .product-card:hover {
            box-shadow: var(--shadow-lg);
            border-color: var(--accent);
        }

        .product-img {
            height: 220px;
            overflow: hidden;
            position: relative;
        }

        .product-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .product-card:hover .product-img img {
            transform: scale(1.05);
        }

        .product-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(15, 23, 42, 0.85);
            color: #fff;
            padding: 4px 10px;
            font-size: 12px;
            font-weight: 600;
            border-radius: 4px;
            backdrop-filter: blur(4px);
        }

        .product-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .product-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--primary);
        }

        .product-specs {
            list-style: none;
            margin: 15px 0 20px;
            padding: 12px 0;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .product-specs li {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 6px;
            display: flex;
            justify-content: space-between;
        }

        .product-specs li span:last-child {
            font-weight: 600;
            color: var(--primary);
        }

        /* 6. 硬核研发与参数矩阵 */
        .rnd-section {
            background: var(--bg-base);
        }

        .rnd-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

        .rnd-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            padding: 24px;
            border-radius: var(--radius-md);
        }

        .rnd-icon {
            width: 44px;
            height: 44px;
            background: rgba(14, 165, 233, 0.1);
            color: var(--accent);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 18px;
            margin-bottom: 16px;
        }

        .rnd-card h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .rnd-card p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 7. 解决方案作业流程 */
        .solution-section {
            background: #ffffff;
        }

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

        .flow-step {
            background: var(--bg-base);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px;
            position: relative;
        }

        .step-num {
            font-size: 32px;
            font-weight: 900;
            color: #cbd5e1;
            line-height: 1;
            margin-bottom: 12px;
        }

        .flow-step h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .flow-step p {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* 8. 案例精选 */
        .cases-section {
            background: #f1f5f9;
        }

        .case-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

        .case-card {
            background: #ffffff;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            display: flex;
        }

        .case-media {
            width: 45%;
            height: 220px;
        }

        .case-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .case-info {
            width: 55%;
            padding: 24px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .case-info h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .case-info p {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 12px;
        }

        .case-data {
            font-size: 12px;
            font-weight: 700;
            color: var(--accent);
        }

        /* 9. 评价墙（客户真实口碑） */
        .testimonials-section {
            background: #ffffff;
        }

        .testi-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

        .testi-card {
            background: var(--bg-base);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px;
        }

        .testi-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }

        .testi-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary-light);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-size: 14px;
        }

        .testi-name {
            font-size: 15px;
            font-weight: 700;
        }

        .testi-role {
            font-size: 12px;
            color: var(--text-muted);
        }

        .testi-text {
            font-size: 13px;
            color: #475569;
            line-height: 1.6;
        }

        /* 10. 保障图标条 */
        .guarantee-bar-section {
            background: var(--primary);
            color: #ffffff;
            padding: 40px 0;
        }

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

        .guarantee-item h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 6px;
            color: #f8fafc;
        }

        .guarantee-item p {
            font-size: 12px;
            color: #94a3b8;
        }

        /* 11. 行业前沿资讯 */
        .news-section {
            background: #f8fafc;
        }

        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

        .news-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }

        .news-card-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .news-date {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 8px;
        }

        .news-card h3 {
            font-size: 16px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 10px;
        }

        .news-card p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 15px;
        }

        /* 12. 加购与方案定制引导 */
        .cta-box-section {
            background: #ffffff;
        }

        .cta-card {
            background: linear-gradient(135deg, #0ea5e9 0%, #0284c7 100%);
            border-radius: var(--radius-lg);
            padding: 50px;
            color: #ffffff;
            display: flex;
            justify-content: space-between;
            align-items: center;
            box-shadow: 0 15px 30px rgba(14, 165, 233, 0.25);
        }

        .cta-content {
            max-width: 650px;
        }

        .cta-content h2 {
            font-size: 30px;
            font-weight: 800;
            margin-bottom: 12px;
        }

        .cta-content p {
            font-size: 15px;
            color: #e0f2fe;
            line-height: 1.7;
        }

        /* 页脚统一规范 */
        .site-footer {
            background: #090d16;
            color: #94a3b8;
            font-size: 13px;
            padding: 60px 0 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 50px;
        }

        .footer-brand h3 {
            font-size: 20px;
            font-weight: 800;
            color: #ffffff;
            margin-bottom: 16px;
        }

        .footer-brand p {
            line-height: 1.8;
            margin-bottom: 20px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 18px;
        }

        .footer-links {
            list-style: none;
        }

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

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

        .footer-bottom {
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
        }

        /* 移动端适配 */
        @media (max-width: 1024px) {
            .hero-grid, .case-grid, .footer-grid {
                grid-template-columns: 1fr;
            }
            .tier-grid, .product-grid, .rnd-grid, .flow-grid, .testi-grid, .guarantee-grid, .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cta-card {
                flex-direction: column;
                text-align: center;
                gap: 25px;
            }
        }

        @media (max-width: 768px) {
            .top-bar { display: none; }
            .nav-links { display: none; }
            .hero-content h1 { font-size: 30px; }
            .section-title { font-size: 24px; }
            .tier-grid, .product-grid, .rnd-grid, .flow-grid, .testi-grid, .guarantee-grid, .news-grid {
                grid-template-columns: 1fr;
            }
            .case-card {
                flex-direction: column;
            }
            .case-media, .case-info {
                width: 100%;
            }
            .flash-bar {
                flex-direction: column;
                gap: 10px;
                text-align: center;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 10px;
                text-align: center;
            }
        }