/* roulang page: index */
:root {
            --primary: #6366f1;
            --primary-gradient: linear-gradient(135deg, #6366f1 0%, #3b82f6 100%);
            --accent-green: #10b981;
            --accent-amber: #f59e0b;
            --bg-main: #f8fafc;
            --bg-card: #ffffff;
            --bg-alt: #f1f5f9;
            --bg-dark: #0f172a;
            --card-dark: #1e293b;
            --text-main: #0f172a;
            --text-muted: #64748b;
            --text-white: #ffffff;
            --border-light: #e2e8f0;
            --border-dark: #334155;
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-full: 9999px;
            --shadow-subtle: 0 4px 20px -2px rgba(99, 102, 241, 0.08);
            --shadow-card: 0 10px 25px -5px rgba(15, 23, 42, 0.05), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
            --shadow-glow: 0 10px 30px -5px rgba(99, 102, 241, 0.35);
            --transition: all 0.3s 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: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-main);
            color: var(--text-main);
            line-height: 1.7;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

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

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

        ul, ol {
            list-style: none;
        }

        button, input {
            font-family: inherit;
        }

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

        /* 徽章组件与微动效 */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 14px;
            border-radius: var(--radius-full);
            font-size: 0.825rem;
            font-weight: 600;
            background: rgba(99, 102, 241, 0.08);
            color: var(--primary);
            border: 1px solid rgba(99, 102, 241, 0.2);
            box-shadow: var(--shadow-subtle);
        }

        .badge-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--accent-green);
            box-shadow: 0 0 8px var(--accent-green);
            animation: pulse-dot 2s infinite ease-in-out;
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.4; transform: scale(0.85); }
        }

        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 50px;
        }

        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-main);
            margin: 12px 0 16px;
            line-height: 1.3;
        }

        .section-header p {
            color: var(--text-muted);
            font-size: 1.05rem;
            line-height: 1.7;
        }

        /* 顶部通栏与主导航 */
        .top-bar {
            background-color: #eef2f6;
            font-size: 0.8rem;
            color: var(--text-muted);
            border-bottom: 1px solid var(--border-light);
            padding: 7px 0;
        }

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

        .top-ticker {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .top-tag {
            background: #e0e7ff;
            color: var(--primary);
            padding: 2px 8px;
            border-radius: 4px;
            font-weight: bold;
            font-size: 0.75rem;
        }

        .top-links {
            display: flex;
            gap: 18px;
        }

        .top-links a:hover {
            color: var(--primary);
        }

        .main-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 74px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: -0.5px;
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            background: var(--primary-gradient);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-white);
            font-weight: 900;
            font-size: 1.1rem;
            box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 28px;
        }

        .nav-item {
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-main);
            position: relative;
            padding: 6px 0;
        }

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

        .nav-item::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary-gradient);
            transition: var(--transition);
        }

        .nav-item:hover::after, .nav-item.active::after {
            width: 100%;
        }

        .nav-cta {
            background: var(--primary-gradient);
            color: var(--text-white);
            padding: 10px 22px;
            border-radius: var(--radius-full);
            font-weight: 700;
            font-size: 0.95rem;
            box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
            display: inline-block;
        }

        .nav-cta:hover {
            box-shadow: 0 6px 20px rgba(99, 102, 241, 0.45);
            transform: translateY(-1px);
            color: #fff;
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
        }

        .mobile-toggle span {
            display: block;
            width: 24px;
            height: 2.5px;
            background-color: var(--text-main);
            margin: 5px 0;
            transition: var(--transition);
            border-radius: 2px;
        }

        /* 优惠券通告与秒杀条 */
        .coupon-strip {
            background: #fffbeb;
            border-bottom: 1px solid #fde68a;
            padding: 12px 0;
        }

        .coupon-strip-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }

        .flash-clock {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            color: #b45309;
            font-size: 0.9rem;
        }

        .clock-box {
            background: #78350f;
            color: #fff;
            padding: 2px 7px;
            border-radius: 4px;
            font-family: monospace;
            font-size: 0.95rem;
        }

        .coupon-ticker-text {
            color: #92400e;
            font-size: 0.9rem;
        }

        /* 首屏 Hero 区 */
        .hero-section {
            position: relative;
            padding: 80px 0 90px;
            background: linear-gradient(180deg, #f8fafc 0%, #edf2f7 100%);
            overflow: hidden;
        }

        .hero-bg-overlay {
            position: absolute;
            inset: 0;
            opacity: 0.08;
            pointer-events: none;
            background-image: url('/assets/images/ca2ffa9b86849169.jpg');
            background-size: cover;
            background-position: center;
        }

        .hero-layout {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 50px;
            align-items: center;
        }

        .hero-content h1 {
            font-size: 3rem;
            line-height: 1.25;
            font-weight: 900;
            color: var(--text-main);
            margin: 18px 0 20px;
            letter-spacing: -0.02em;
        }

        .hero-content h1 span {
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-intro {
            font-size: 1.1rem;
            color: var(--text-muted);
            margin-bottom: 32px;
            line-height: 1.8;
            text-align: justify;
        }

        .hero-btn-group {
            display: flex;
            gap: 16px;
            align-items: center;
            flex-wrap: wrap;
            margin-bottom: 36px;
        }

        .btn-primary {
            background: var(--primary-gradient);
            color: var(--text-white);
            padding: 14px 32px;
            border-radius: var(--radius-full);
            font-weight: 700;
            font-size: 1rem;
            box-shadow: var(--shadow-glow);
            border: none;
            cursor: pointer;
            transition: var(--transition);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 14px 28px -4px rgba(99, 102, 241, 0.45);
        }

        .btn-outline {
            background: #fff;
            color: var(--text-main);
            border: 1px solid var(--border-light);
            padding: 14px 28px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            box-shadow: var(--shadow-subtle);
        }

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

        .hero-badges-row {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .mini-badge {
            background: #ffffff;
            border: 1px solid var(--border-light);
            padding: 8px 16px;
            border-radius: var(--radius-full);
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-muted);
            box-shadow: 0 2px 6px rgba(0, 0, 0, 0.03);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .mini-badge strong {
            color: var(--text-main);
        }

        /* 优惠券卡与主券面放大 */
        .coupon-card-wall {
            background: #ffffff;
            border-radius: var(--radius-lg);
            padding: 30px;
            box-shadow: var(--shadow-card);
            border: 2px dashed #c7d2fe;
            position: relative;
            background-color: #fcfdff;
        }

        .coupon-top-tag {
            position: absolute;
            top: -14px;
            left: 30px;
            background: #ef4444;
            color: #fff;
            font-size: 0.75rem;
            font-weight: 800;
            padding: 4px 12px;
            border-radius: var(--radius-full);
            text-transform: uppercase;
        }

        .coupon-value {
            font-size: 2.8rem;
            font-weight: 900;
            color: #ef4444;
            display: flex;
            align-items: baseline;
            gap: 4px;
        }

        .coupon-value small {
            font-size: 1.2rem;
            font-weight: 700;
        }

        .coupon-title {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--text-main);
            margin: 8px 0 6px;
        }

        .coupon-desc {
            font-size: 0.875rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        .coupon-stock-bar {
            background: #fee2e2;
            height: 8px;
            border-radius: var(--radius-full);
            overflow: hidden;
            margin-bottom: 12px;
        }

        .coupon-stock-fill {
            width: 82%;
            height: 100%;
            background: #ef4444;
            border-radius: var(--radius-full);
        }

        .stock-meta {
            display: flex;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        .coupon-action-btn {
            width: 100%;
            background: #ef4444;
            color: #fff;
            padding: 13px 0;
            border-radius: var(--radius-md);
            font-weight: 800;
            border: none;
            cursor: pointer;
            font-size: 1rem;
            transition: var(--transition);
        }

        .coupon-action-btn:hover {
            background: #dc2626;
            box-shadow: 0 8px 20px -2px rgba(239, 68, 68, 0.4);
        }

        /* 统计数据大看板 */
        .dashboard-section {
            padding: 60px 0;
            background: #ffffff;
            border-bottom: 1px solid var(--border-light);
        }

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

        .metric-card {
            background: var(--bg-main);
            padding: 28px 24px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }

        .metric-card:hover {
            transform: translateY(-4px);
            border-color: var(--primary);
            box-shadow: var(--shadow-card);
        }

        .metric-num {
            font-size: 2.6rem;
            font-weight: 900;
            color: var(--text-main);
            font-family: Consolas, Monaco, monospace;
            line-height: 1.1;
            margin-bottom: 8px;
        }

        .metric-label {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-muted);
            margin-bottom: 10px;
        }

        .metric-trend {
            display: inline-flex;
            align-items: center;
            font-size: 0.8rem;
            color: var(--accent-green);
            font-weight: 700;
        }

        /* 安全主张与核心技术 */
        .safe-section {
            padding: 90px 0;
            background: #ffffff;
        }

        .safe-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .safe-img-box {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }

        .safe-img-box img {
            width: 100%;
            height: 420px;
            object-fit: cover;
        }

        .tech-spec-badge {
            position: absolute;
            bottom: 20px;
            left: 20px;
            background: rgba(15, 23, 42, 0.85);
            backdrop-filter: blur(8px);
            color: #ffffff;
            padding: 12px 20px;
            border-radius: var(--radius-md);
            border: 1px solid rgba(255, 255, 255, 0.15);
            font-size: 0.85rem;
        }

        .safe-list {
            margin-top: 24px;
        }

        .safe-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            margin-bottom: 20px;
        }

        .safe-icon-circle {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: #eef2ff;
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            flex-shrink: 0;
        }

        .safe-item h4 {
            font-size: 1.15rem;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 4px;
        }

        .safe-item p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 核心优势矩阵 6 大卡 */
        .features-section {
            padding: 100px 0;
            background: var(--bg-alt);
        }

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

        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 36px 30px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .feature-card:hover {
            transform: translateY(-6px);
            border-color: rgba(99, 102, 241, 0.4);
            box-shadow: 0 16px 32px -4px rgba(99, 102, 241, 0.15);
        }

        .feature-icon-wrapper {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: #e0e7ff;
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            font-weight: 900;
            margin-bottom: 22px;
        }

        .feature-card h3 {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 12px;
        }

        .feature-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
            margin-bottom: 20px;
        }

        .feature-footer-tag {
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--primary);
            border-top: 1px solid var(--border-light);
            padding-top: 14px;
        }

        /* 终端版本展示卡 */
        .products-section {
            padding: 90px 0;
            background: #ffffff;
        }

        .terminal-card {
            background: #ffffff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .terminal-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-glow);
        }

        .terminal-cover {
            height: 190px;
            overflow: hidden;
            background-color: #cbd5e1;
        }

        .terminal-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

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

        .terminal-body {
            padding: 26px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .terminal-body h3 {
            font-size: 1.25rem;
            font-weight: 800;
            margin-bottom: 8px;
        }

        .terminal-body p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 16px;
        }

        .terminal-meta-list {
            margin-bottom: 20px;
            font-size: 0.825rem;
            color: var(--text-muted);
        }

        .terminal-meta-list li {
            margin-bottom: 6px;
            display: flex;
            justify-content: space-between;
        }

        .terminal-btn {
            display: block;
            text-align: center;
            background: var(--bg-alt);
            color: var(--text-main);
            padding: 10px 0;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 0.9rem;
            border: 1px solid var(--border-light);
        }

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

        /* 沉浸式深色案例与理念区块 */
        .dark-concept-section {
            padding: 100px 0;
            background: var(--bg-dark);
            color: #ffffff;
        }

        .dark-concept-section .section-header h2 {
            color: #ffffff;
        }

        .dark-concept-section .section-header p {
            color: #94a3b8;
        }

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

        .dark-card {
            background: var(--card-dark);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-lg);
            padding: 32px 26px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
            transition: var(--transition);
        }

        .dark-card:hover {
            border-color: var(--primary);
            transform: translateY(-4px);
        }

        .dark-card h3 {
            font-size: 1.25rem;
            font-weight: 800;
            margin-bottom: 12px;
            color: #f8fafc;
        }

        .dark-card p {
            font-size: 0.95rem;
            color: #94a3b8;
            line-height: 1.7;
            margin-bottom: 20px;
        }

        .dark-spec-row {
            display: flex;
            justify-content: space-between;
            font-size: 0.8rem;
            color: #64748b;
            border-top: 1px solid var(--border-dark);
            padding-top: 14px;
        }

        .dark-spec-row span strong {
            color: var(--accent-green);
        }

        /* 真实玩家故事区 */
        .stories-section {
            padding: 90px 0;
            background: #ffffff;
        }

        .stories-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }

        .story-card {
            background: var(--bg-main);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 34px 30px;
            display: flex;
            gap: 22px;
            align-items: center;
        }

        .story-avatar {
            width: 76px;
            height: 76px;
            border-radius: 50%;
            object-fit: cover;
            flex-shrink: 0;
            border: 3px solid #e0e7ff;
        }

        .story-content h4 {
            font-size: 1.15rem;
            font-weight: 800;
            margin-bottom: 6px;
        }

        .story-tag {
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
        }

        .story-content p {
            font-size: 0.925rem;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* 发展里程碑与数据线 */
        .milestones-section {
            padding: 80px 0;
            background: var(--bg-alt);
        }

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

        .milestones-timeline::before {
            content: '';
            position: absolute;
            top: 24px;
            left: 20px;
            right: 20px;
            height: 3px;
            background: #cbd5e1;
            z-index: 1;
        }

        .milestone-node {
            position: relative;
            z-index: 2;
        }

        .node-dot {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: #ffffff;
            border: 5px solid var(--primary);
            margin-bottom: 18px;
        }

        .milestone-node h4 {
            font-size: 1.1rem;
            font-weight: 800;
            margin-bottom: 6px;
        }

        .milestone-node span {
            font-size: 0.825rem;
            font-weight: 700;
            color: var(--primary);
            display: block;
            margin-bottom: 8px;
        }

        .milestone-node p {
            font-size: 0.875rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 玩家口碑评价墙 */
        .reviews-section {
            padding: 90px 0;
            background: #ffffff;
        }

        .review-card {
            background: var(--bg-main);
            border-radius: var(--radius-md);
            padding: 26px;
            border: 1px solid var(--border-light);
        }

        .review-stars {
            color: var(--accent-amber);
            font-size: 1rem;
            margin-bottom: 10px;
        }

        .review-card p {
            font-size: 0.925rem;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 14px;
        }

        .review-author {
            display: flex;
            justify-content: space-between;
            font-size: 0.825rem;
            color: var(--text-main);
            font-weight: 700;
            border-top: 1px solid var(--border-light);
            padding-top: 10px;
        }

        .review-device {
            color: var(--text-muted);
            font-weight: normal;
        }

        /* 内嵌热点资讯列表与更新快讯 */
        .feed-section {
            padding: 90px 0;
            background: var(--bg-alt);
        }

        .feed-layout {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 32px;
        }

        .featured-feed-card {
            background: #ffffff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
        }

        .featured-feed-img {
            height: 260px;
            position: relative;
        }

        .featured-feed-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .feed-badge-float {
            position: absolute;
            top: 16px;
            left: 16px;
            background: rgba(15, 23, 42, 0.85);
            color: #ffffff;
            font-size: 0.8rem;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: 4px;
        }

        .featured-feed-body {
            padding: 30px;
            flex: 1;
        }

        .featured-feed-body h3 {
            font-size: 1.4rem;
            font-weight: 800;
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .featured-feed-body p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
            margin-bottom: 20px;
        }

        .feed-list-side {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .feed-item-small {
            background: #ffffff;
            border-radius: var(--radius-md);
            padding: 18px 20px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-subtle);
            transition: var(--transition);
        }

        .feed-item-small:hover {
            border-color: var(--primary);
            transform: translateX(4px);
        }

        .feed-item-small span {
            font-size: 0.775rem;
            font-weight: 700;
            color: var(--primary);
            display: block;
            margin-bottom: 4px;
        }

        .feed-item-small h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .feed-item-small p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* 平台合规与安全保障 */
        .security-section {
            padding: 80px 0;
            background: #ffffff;
        }

        .sec-card {
            background: var(--bg-main);
            border-radius: var(--radius-md);
            padding: 24px;
            border: 1px solid var(--border-light);
            text-align: center;
        }

        .sec-icon {
            font-size: 1.8rem;
            color: var(--accent-green);
            margin-bottom: 12px;
        }

        .sec-card h4 {
            font-size: 1.1rem;
            font-weight: 800;
            margin-bottom: 8px;
        }

        .sec-card p {
            font-size: 0.875rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 常见问答手风琴 */
        .faq-section {
            padding: 90px 0;
            background: var(--bg-alt);
        }

        .faq-accordion {
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-item {
            background: #ffffff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
            box-shadow: var(--shadow-subtle);
        }

        .faq-question {
            width: 100%;
            text-align: left;
            padding: 20px 24px;
            background: none;
            border: none;
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-main);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
        }

        .faq-question::after {
            content: '+';
            font-size: 1.4rem;
            color: var(--primary);
            transition: var(--transition);
        }

        .faq-item.active .faq-question::after {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            padding: 0 24px;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        .faq-item.active .faq-answer {
            padding-bottom: 20px;
        }

        /* 底部强转化 CTA */
        .cta-section {
            padding: 80px 0;
            background: var(--primary-gradient);
            color: #ffffff;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-content {
            position: relative;
            z-index: 2;
            max-width: 740px;
            margin: 0 auto;
        }

        .cta-content h2 {
            font-size: 2.4rem;
            font-weight: 900;
            margin-bottom: 18px;
        }

        .cta-content p {
            font-size: 1.1rem;
            opacity: 0.95;
            margin-bottom: 34px;
            line-height: 1.8;
        }

        .cta-btn-white {
            background: #ffffff;
            color: var(--primary);
            padding: 16px 38px;
            border-radius: var(--radius-full);
            font-weight: 800;
            font-size: 1.05rem;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
            display: inline-block;
            transition: var(--transition);
        }

        .cta-btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 14px 30px rgba(0, 0, 0, 0.3);
            background: #f8fafc;
        }

        /* 全局页脚 Footer */
        .footer {
            background: #090d16;
            color: #94a3b8;
            padding: 70px 0 30px;
            font-size: 0.9rem;
            border-top: 1px solid #1e293b;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 50px;
        }

        .footer-brand h4 {
            color: #ffffff;
            font-size: 1.3rem;
            font-weight: 800;
            margin-bottom: 16px;
        }

        .footer-brand p {
            line-height: 1.7;
            margin-bottom: 20px;
            font-size: 0.875rem;
        }

        .footer-links h5 {
            color: #ffffff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 18px;
        }

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

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

        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 26px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 0.8rem;
        }

        /* 响应式断点适配 */
        @media (max-width: 1024px) {
            .hero-layout {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .dark-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .milestones-timeline {
                grid-template-columns: repeat(2, 1fr);
                gap: 30px;
            }
            .milestones-timeline::before {
                display: none;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .top-bar {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .nav-menu {
                position: fixed;
                top: 74px;
                left: 0;
                width: 100%;
                background: #ffffff;
                flex-direction: column;
                padding: 30px 20px;
                gap: 20px;
                border-bottom: 1px solid var(--border-light);
                transform: translateY(-150%);
                transition: var(--transition);
                box-shadow: 0 10px 20px rgba(0,0,0,0.1);
            }
            .nav-menu.open {
                transform: translateY(0);
            }
            .hero-content h1 {
                font-size: 2.2rem;
            }
            .safe-grid, .stories-grid, .feed-layout {
                grid-template-columns: 1fr;
            }
            .grid-3, .dark-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .grid-4 {
                grid-template-columns: 1fr;
            }
            .hero-btn-group {
                flex-direction: column;
                width: 100%;
            }
            .btn-primary, .btn-outline {
                width: 100%;
                text-align: center;
            }
        }