/* roulang page: index */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #60a5fa;
            --accent: #0ea5e9;
            --accent-glow: rgba(14, 165, 233, 0.15);
            --bg-page: #f8fafc;
            --bg-card: #ffffff;
            --bg-muted: #f1f5f9;
            --text-main: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --border-light: #e2e8f0;
            --border-focus: #3b82f6;
            --success: #10b981;
            --warning: #f59e0b;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-subtle: 0 4px 12px rgba(15, 23, 42, 0.05);
            --shadow-card: 0 10px 30px -5px rgba(15, 23, 42, 0.08);
            --shadow-hover: 0 20px 40px -10px rgba(37, 99, 235, 0.18);
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }

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

        body {
            font-family: var(--font-family);
            background-color: var(--bg-page);
            color: var(--text-main);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

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

        .container {
            width: 100%;
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 顶部导航 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            transition: all 0.3s ease;
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 76px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 24px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
        }

        .logo-symbol {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #ffffff;
            font-size: 18px;
            font-weight: 900;
            box-shadow: 0 4px 10px rgba(37, 99, 235, 0.25);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            list-style: none;
            gap: 28px;
        }

        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            padding: 8px 0;
        }

        .nav-link:hover, .nav-link.active {
            color: var(--primary);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .nav-meta-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #ecfdf5;
            color: #065f46;
            font-size: 13px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 999px;
            border: 1px solid #a7f3d0;
        }

        .pulse-dot {
            width: 8px;
            height: 8px;
            background: #10b981;
            border-radius: 50%;
            box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
            animation: pulseAnimation 2s infinite;
        }

        @keyframes pulseAnimation {
            0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
            70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
            100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
        }

        .btn-nav-action {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #ffffff;
            font-size: 14px;
            font-weight: 600;
            padding: 10px 22px;
            border-radius: var(--radius-sm);
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
            transition: all 0.2s ease;
        }

        .btn-nav-action:hover {
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(37, 99, 235, 0.3);
            color: #ffffff;
        }

        /* 基础板块公用 */
        section {
            padding: 80px 0;
            position: relative;
        }

        .section-header {
            text-align: center;
            max-width: 820px;
            margin: 0 auto 56px auto;
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 1px;
            text-transform: uppercase;
            color: var(--primary);
            background: rgba(37, 99, 235, 0.08);
            padding: 5px 14px;
            border-radius: 999px;
            margin-bottom: 14px;
        }

        .section-title {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: -0.5px;
            line-height: 1.35;
            margin-bottom: 16px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        /* Hero 区域：卡片堆叠交错 */
        .hero-section {
            padding: 70px 0 100px 0;
            background: radial-gradient(circle at 50% 20%, rgba(37, 99, 235, 0.08) 0%, transparent 60%);
            overflow: hidden;
        }

        .hero-intro-box {
            text-align: center;
            max-width: 860px;
            margin: 0 auto 50px auto;
        }

        .hero-title {
            font-size: 42px;
            font-weight: 900;
            color: var(--text-main);
            line-height: 1.28;
            margin-bottom: 20px;
            letter-spacing: -1px;
        }

        .hero-paragraph {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 32px;
        }

        .hero-cta-group {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #ffffff;
            font-size: 16px;
            font-weight: 600;
            padding: 14px 34px;
            border-radius: var(--radius-md);
            box-shadow: 0 10px 20px -5px rgba(37, 99, 235, 0.35);
            transition: all 0.25s ease;
            cursor: pointer;
            border: none;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 14px 28px -5px rgba(37, 99, 235, 0.45);
            color: #ffffff;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #ffffff;
            color: var(--text-main);
            font-size: 16px;
            font-weight: 600;
            padding: 14px 30px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-subtle);
            transition: all 0.25s ease;
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: #f8fafc;
        }

        /* 堆叠卡片舞台 */
        .hero-stage-stack {
            position: relative;
            max-width: 1040px;
            height: 400px;
            margin: 40px auto 0 auto;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .stack-card {
            position: absolute;
            background: #ffffff;
            border-radius: var(--radius-xl);
            padding: 30px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-light);
            transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
        }

        .stack-card.left {
            width: 320px;
            left: 20px;
            transform: translateY(20px) scale(0.92) rotate(-3deg);
            z-index: 2;
            opacity: 0.95;
            background: linear-gradient(180deg, #ffffff, #f8fafc);
        }

        .stack-card.right {
            width: 320px;
            right: 20px;
            transform: translateY(20px) scale(0.92) rotate(3deg);
            z-index: 2;
            opacity: 0.95;
            background: linear-gradient(180deg, #ffffff, #f8fafc);
        }

        .stack-card.main {
            width: 580px;
            z-index: 5;
            transform: translateY(0) scale(1);
            border: 2px solid rgba(37, 99, 235, 0.2);
            box-shadow: 0 25px 50px -12px rgba(37, 99, 235, 0.2);
        }

        .stack-card:hover {
            transform: translateY(-5px) scale(1.02);
            z-index: 10;
        }

        .card-pill-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: 999px;
            margin-bottom: 14px;
        }

        .pill-blue { background: #eff6ff; color: #1d4ed8; }
        .pill-purple { background: #faf5ff; color: #7e22ce; }
        .pill-emerald { background: #ecfdf5; color: #047857; }

        .matrix-grid-visual {
            display: grid;
            grid-template-columns: repeat(8, 1fr);
            gap: 6px;
            margin: 20px 0;
            background: #0f172a;
            padding: 16px;
            border-radius: var(--radius-md);
        }

        .matrix-grid-node {
            height: 18px;
            background: #334155;
            border-radius: 3px;
            transition: all 0.2s ease;
        }

        .matrix-grid-node.active {
            background: #38bdf8;
            box-shadow: 0 0 8px #38bdf8;
        }

        .matrix-grid-node.hot {
            background: #10b981;
            box-shadow: 0 0 8px #10b981;
        }

        .channel-stat-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: var(--text-secondary);
            border-top: 1px dashed var(--border-light);
            padding-top: 12px;
        }

        /* 痛点板块 */
        .pain-points-section {
            background: #ffffff;
        }

        .pain-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .pain-card {
            background: #f8fafc;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            transition: all 0.3s ease;
        }

        .pain-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
            border-color: #cbd5e1;
        }

        .pain-icon-wrapper {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-md);
            background: #fee2e2;
            color: #ef4444;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            font-weight: bold;
            margin-bottom: 20px;
        }

        .pain-card h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
        }

        .pain-card p {
            font-size: 14.5px;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        /* 解决方案架构 */
        .solution-section {
            background: #f1f5f9;
        }

        .solution-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .solution-card {
            background: #ffffff;
            border-radius: var(--radius-lg);
            padding: 36px 30px;
            box-shadow: var(--shadow-subtle);
            border: 1px solid rgba(226, 232, 240, 0.8);
            position: relative;
            overflow: hidden;
            transition: all 0.3s ease;
        }

        .solution-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .solution-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-card);
        }

        .solution-card:hover::before {
            opacity: 1;
        }

        .solution-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 14px;
            color: var(--text-main);
        }

        .solution-card p {
            font-size: 14.5px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 20px;
        }

        .feature-bullets {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .feature-bullets li {
            font-size: 13.5px;
            color: var(--text-main);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .feature-bullets li::before {
            content: '✓';
            color: var(--success);
            font-weight: 800;
        }

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

        .ladder-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .ladder-card {
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            background: #ffffff;
            text-align: center;
            position: relative;
            transition: all 0.3s ease;
        }

        .ladder-card.popular {
            border: 2px solid var(--primary);
            box-shadow: 0 12px 30px -5px rgba(37, 99, 235, 0.15);
            transform: scale(1.03);
            z-index: 2;
        }

        .popular-badge {
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--primary);
            color: #ffffff;
            font-size: 12px;
            font-weight: 700;
            padding: 3px 16px;
            border-radius: 999px;
            letter-spacing: 0.5px;
        }

        .ladder-level {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-muted);
            margin-bottom: 10px;
        }

        .ladder-name {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 14px;
        }

        .ladder-discount {
            font-size: 34px;
            font-weight: 900;
            color: var(--primary);
            margin-bottom: 16px;
        }

        .ladder-discount span {
            font-size: 15px;
            font-weight: normal;
            color: var(--text-secondary);
        }

        .ladder-card p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 24px;
            line-height: 1.6;
        }

        /* 套餐对比板块 */
        .tier-comparison-section {
            background: #f8fafc;
        }

        .table-responsive {
            width: 100%;
            overflow-x: auto;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-subtle);
            background: #ffffff;
            border: 1px solid var(--border-light);
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            font-size: 14.5px;
        }

        .comparison-table th, .comparison-table td {
            padding: 20px 24px;
            border-bottom: 1px solid var(--border-light);
        }

        .comparison-table th {
            background: #f1f5f9;
            font-size: 16px;
            font-weight: 700;
            color: var(--text-main);
        }

        .comparison-table tr:hover td {
            background: #f8fafc;
        }

        .highlight-col {
            background: rgba(37, 99, 235, 0.03);
            font-weight: 600;
            color: var(--primary);
        }

        /* 限时入口与活动排期 */
        .limited-entry-section {
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            color: #ffffff;
            padding: 90px 0;
        }

        .limited-entry-section .section-title {
            color: #ffffff;
        }

        .limited-entry-section .section-desc {
            color: #94a3b8;
        }

        .entry-box-container {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-xl);
            padding: 48px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
        }

        .entry-content-side {
            flex: 1;
        }

        .countdown-badges-wrap {
            display: flex;
            align-items: center;
            gap: 16px;
            margin: 24px 0 32px 0;
        }

        .time-card {
            background: rgba(15, 23, 42, 0.8);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-sm);
            padding: 12px 18px;
            text-align: center;
            min-width: 72px;
        }

        .time-card .number {
            font-size: 26px;
            font-weight: 900;
            color: #38bdf8;
            display: block;
            line-height: 1.1;
        }

        .time-card .label {
            font-size: 11px;
            color: #94a3b8;
            text-transform: uppercase;
        }

        /* 爆款清单板块 */
        .featured-list-section {
            background: #ffffff;
        }

        .product-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .product-card {
            background: #ffffff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 24px;
            display: flex;
            flex-direction: column;
            transition: all 0.3s ease;
        }

        .product-card:hover {
            transform: translateY(-5px);
            border-color: var(--primary);
            box-shadow: var(--shadow-card);
        }

        .product-thumb {
            height: 140px;
            background: linear-gradient(135deg, #f1f5f9, #e2e8f0);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-weight: 800;
            font-size: 20px;
            margin-bottom: 20px;
            letter-spacing: 1px;
        }

        .product-card h4 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
        }

        .product-card p {
            font-size: 13.5px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 16px;
            flex-grow: 1;
        }

        .product-param-chip {
            display: inline-block;
            font-size: 12px;
            color: var(--primary-dark);
            background: #eff6ff;
            padding: 3px 8px;
            border-radius: 4px;
            margin-bottom: 14px;
            align-self: flex-start;
        }

        /* 评价墙板块 */
        .testimonial-wall-section {
            background: #f8fafc;
        }

        .wall-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 26px;
        }

        .testimonial-card {
            background: #ffffff;
            border-radius: var(--radius-lg);
            padding: 30px;
            box-shadow: var(--shadow-subtle);
            border: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .rating-stars {
            color: #f59e0b;
            font-size: 16px;
            margin-bottom: 14px;
            letter-spacing: 2px;
        }

        .quote-text {
            font-size: 14.5px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 24px;
        }

        .client-profile {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .client-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 15px;
        }

        .client-info h5 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-main);
        }

        .client-info span {
            font-size: 12.5px;
            color: var(--text-muted);
        }

        /* 联盟推广板块 */
        .affiliate-matrix-section {
            background: #ffffff;
        }

        .affiliate-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
        }

        .affiliate-item-card {
            border: 1px dashed #cbd5e1;
            border-radius: var(--radius-md);
            padding: 26px 20px;
            text-align: center;
            background: #fbfcfe;
            transition: all 0.3s ease;
        }

        .affiliate-item-card:hover {
            border-color: var(--primary);
            background: #ffffff;
            box-shadow: var(--shadow-subtle);
            transform: translateY(-3px);
        }

        .affiliate-icon-circle {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: #e0f2fe;
            color: var(--primary);
            font-size: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px auto;
            font-weight: bold;
        }

        .affiliate-item-card h4 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-main);
        }

        .affiliate-item-card p {
            font-size: 13.5px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* 保障图标条板块 */
        .guarantee-strip-section {
            background: #f1f5f9;
            padding: 60px 0;
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

        .guarantee-flex {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 24px;
        }

        .guarantee-point {
            display: flex;
            align-items: center;
            gap: 16px;
            flex: 1;
            min-width: 200px;
        }

        .guarantee-glyph {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: #ffffff;
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
            flex-shrink: 0;
        }

        .guarantee-point-info h5 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-main);
        }

        .guarantee-point-info p {
            font-size: 12.5px;
            color: var(--text-muted);
        }

        /* 资讯动态板块 */
        .news-insights-section {
            background: #ffffff;
        }

        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .news-card {
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: #ffffff;
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
        }

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

        .news-header-banner {
            height: 150px;
            background: linear-gradient(135deg, #1e293b, #334155);
            padding: 20px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .news-category-badge {
            align-self: flex-start;
            background: rgba(255, 255, 255, 0.2);
            color: #ffffff;
            font-size: 11.5px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 4px;
        }

        .news-date-text {
            color: #94a3b8;
            font-size: 12px;
        }

        .news-body {
            padding: 24px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .news-body h4 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
            line-height: 1.45;
        }

        .news-body p {
            font-size: 13.8px;
            color: var(--text-secondary);
            line-height: 1.65;
            margin-bottom: 16px;
        }

        .news-read-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .news-read-link:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }

        /* 加购与收口引导板块 */
        .cart-guidance-section {
            background: radial-gradient(circle at 50% 50%, #eff6ff 0%, #f8fafc 100%);
            padding: 90px 0;
        }

        .closing-cta-card {
            background: #ffffff;
            border-radius: var(--radius-xl);
            border: 2px solid rgba(37, 99, 235, 0.15);
            padding: 56px 48px;
            box-shadow: 0 20px 40px -10px rgba(37, 99, 235, 0.12);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 48px;
        }

        .closing-text-wrap {
            max-width: 640px;
        }

        .closing-text-wrap h3 {
            font-size: 30px;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .closing-text-wrap p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .closing-action-wrap {
            display: flex;
            flex-direction: column;
            gap: 14px;
            min-width: 240px;
        }

        /* 页脚体系 */
        .site-footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 70px 0 30px 0;
            border-top: 1px solid #1e293b;
        }

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

        .footer-brand h4 {
            color: #ffffff;
            font-size: 22px;
            font-weight: 800;
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: 20px;
            color: #94a3b8;
        }

        .footer-col h5 {
            color: #f1f5f9;
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 18px;
        }

        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-links a {
            font-size: 14px;
            color: #94a3b8;
        }

        .footer-links a:hover {
            color: #38bdf8;
        }

        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            flex-wrap: wrap;
            gap: 16px;
        }

        /* 响应式断点 */
        @media (max-width: 1024px) {
            .hero-title { font-size: 34px; }
            .hero-stage-stack { height: auto; flex-direction: column; gap: 20px; margin-top: 30px; }
            .stack-card.left, .stack-card.right, .stack-card.main {
                position: static;
                width: 100%;
                max-width: 540px;
                transform: none !important;
            }
            .product-grid { grid-template-columns: repeat(2, 1fr); }
            .ladder-grid { grid-template-columns: 1fr; max-width: 460px; margin: 0 auto; }
            .ladder-card.popular { transform: none; }
            .wall-grid { grid-template-columns: 1fr; }
            .affiliate-grid { grid-template-columns: repeat(2, 1fr); }
            .news-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .entry-box-container { flex-direction: column; text-align: center; }
            .countdown-badges-wrap { justify-content: center; }
            .closing-cta-card { flex-direction: column; text-align: center; }
        }

        @media (max-width: 768px) {
            .site-header .nav-menu { display: none; }
            .pain-grid { grid-template-columns: 1fr; }
            .solution-grid { grid-template-columns: 1fr; }
            .product-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; }
            .guarantee-flex { flex-direction: column; align-items: flex-start; }
            .hero-title { font-size: 28px; }
            .section-title { font-size: 25px; }
            .closing-cta-card { padding: 36px 24px; }
        }

        @media (max-width: 520px) {
            .hero-cta-group { flex-direction: column; width: 100%; }
            .btn-primary, .btn-outline { width: 100%; justify-content: center; }
            .stack-card { padding: 20px; }
            .entry-box-container { padding: 28px 18px; }
            .time-card { min-width: 58px; padding: 8px 10px; }
            .time-card .number { font-size: 20px; }
        }