/* roulang page: index */
:root {
            --bg-dark: #0C1015;
            --bg-deep: #06080B;
            --bg-card-dark: #141A22;
            --bg-card-dark-hover: #1A222D;
            --bg-light: #F8FAFC;
            --bg-light-subtle: #F1F5F9;
            --bg-card-light: #FFFFFF;
            --accent-green: #00E599;
            --accent-green-glow: rgba(0, 229, 153, 0.28);
            --accent-orange: #FF5E1E;
            --accent-orange-hover: #E04E14;
            --text-light: #F8FAFC;
            --text-dark: #0F172A;
            --text-muted-dark: #94A3B8;
            --text-muted-light: #475569;
            --border-dark: rgba(255, 255, 255, 0.09);
            --border-light: rgba(15, 23, 42, 0.08);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 18px;
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;
            --container-max: 1240px;
            --header-height: 112px;
        }

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

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

        body {
            font-family: var(--font-family);
            background-color: var(--bg-dark);
            color: var(--text-light);
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

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

        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
        }

        .container {
            width: 100%;
            max-width: var(--container-max);
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* 锚点防遮挡 */
        section {
            scroll-margin-top: 80px;
        }

        /* 排版通用 */
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 5px 14px;
            border-radius: 9999px;
            font-size: 0.8125rem;
            font-weight: 600;
            letter-spacing: 0.05em;
            text-transform: uppercase;
            margin-bottom: 16px;
        }
        .tag-green-dark {
            background: rgba(0, 229, 153, 0.12);
            color: var(--accent-green);
            border: 1px solid rgba(0, 229, 153, 0.3);
        }
        .tag-green-light {
            background: rgba(0, 229, 153, 0.15);
            color: #00875A;
            border: 1px solid rgba(0, 229, 153, 0.4);
        }

        .section-title {
            font-size: 2.25rem;
            font-weight: 800;
            line-height: 1.35;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }
        .section-desc {
            font-size: 1.0625rem;
            line-height: 1.85;
            max-width: 780px;
            margin-bottom: 48px;
        }
        .text-center {
            text-align: center;
        }
        .center-desc {
            margin-left: auto;
            margin-right: auto;
        }

        /* 按钮体系 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 13px 28px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.9375rem;
            cursor: pointer;
            border: 1px solid transparent;
            transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.25s ease, background 0.2s ease, border-color 0.2s ease;
            min-height: 48px;
        }
        .btn:hover {
            transform: translateY(-2px);
        }
        .btn:active {
            transform: translateY(0);
        }
        .btn-primary {
            background-color: var(--accent-orange);
            color: #FFFFFF;
            box-shadow: 0 4px 18px rgba(255, 94, 30, 0.32);
        }
        .btn-primary:hover {
            background-color: var(--accent-orange-hover);
            box-shadow: 0 6px 24px rgba(255, 94, 30, 0.48);
        }
        .btn-accent {
            background-color: var(--accent-green);
            color: #06110D;
            font-weight: 700;
            box-shadow: 0 4px 18px var(--accent-green-glow);
        }
        .btn-accent:hover {
            background-color: #05f8a7;
            box-shadow: 0 6px 24px rgba(0, 229, 153, 0.45);
        }
        .btn-outline-dark {
            background: rgba(255, 255, 255, 0.05);
            border-color: rgba(255, 255, 255, 0.2);
            color: var(--text-light);
        }
        .btn-outline-dark:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: var(--accent-green);
            color: var(--accent-green);
        }

        /* 顶部双行导航 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(12, 16, 21, 0.94);
            backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-dark);
        }
        .top-bar {
            background: #070A0E;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            font-size: 0.8125rem;
            color: var(--text-muted-dark);
            padding: 7px 0;
        }
        .top-bar-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .status-indicator {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .status-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: 0.45; transform: scale(0.85); }
        }

        .main-nav {
            padding: 14px 0;
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--text-light);
            letter-spacing: -0.01em;
        }
        .brand-logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent-green) 0%, #00875A 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #06110D;
            font-weight: 900;
            font-size: 1.2rem;
            box-shadow: 0 0 14px rgba(0, 229, 153, 0.35);
        }
        .nav-menu {
            display: flex;
            list-style: none;
            gap: 28px;
            align-items: center;
        }
        .nav-link {
            font-size: 0.9375rem;
            font-weight: 500;
            color: #CBD5E1;
            padding: 6px 0;
            position: relative;
        }
        .nav-link:hover {
            color: var(--accent-green);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--accent-green);
            transition: width 0.25s ease;
        }
        .nav-link:hover::after {
            width: 100%;
        }
        .nav-cta-wrapper {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: 1px solid var(--border-dark);
            color: var(--text-light);
            width: 42px;
            height: 42px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            align-items: center;
            justify-content: center;
        }
        .mobile-toggle svg {
            width: 22px;
            height: 22px;
            stroke: currentColor;
        }

        /* 移动端菜单抽屉 */
        .mobile-drawer {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(12, 16, 21, 0.98);
            backdrop-filter: blur(20px);
            padding: 28px 24px;
            flex-direction: column;
            gap: 18px;
            z-index: 999;
            border-top: 1px solid var(--border-dark);
            overflow-y: auto;
        }
        .mobile-drawer.is-open {
            display: flex;
        }
        .mobile-drawer .nav-link {
            font-size: 1.125rem;
            padding: 10px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        /* 板块一：首屏 Hero Section */
        .hero-section {
            position: relative;
            padding: 90px 0 100px;
            background: radial-gradient(circle at 80% 20%, rgba(0, 229, 153, 0.12) 0%, transparent 50%),
                        linear-gradient(180deg, #0C1015 0%, #06080B 100%);
            border-bottom: 1px solid var(--border-dark);
            overflow: hidden;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 56px;
            align-items: center;
        }
        .hero-content h1 {
            font-size: 3.25rem;
            font-weight: 900;
            line-height: 1.22;
            color: #FFFFFF;
            letter-spacing: -0.03em;
            margin-bottom: 22px;
        }
        .hero-content h1 span {
            color: var(--accent-green);
        }
        .hero-lead {
            font-size: 1.125rem;
            color: #CBD5E1;
            line-height: 1.85;
            margin-bottom: 34px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 42px;
        }
        .hero-micro-metrics {
            display: flex;
            align-items: center;
            gap: 32px;
            padding-top: 26px;
            border-top: 1px solid var(--border-dark);
        }
        .micro-metric-item {
            display: flex;
            flex-direction: column;
        }
        .micro-metric-val {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--accent-green);
        }
        .micro-metric-lbl {
            font-size: 0.8125rem;
            color: var(--text-muted-dark);
        }

        .hero-visual-card {
            position: relative;
            border-radius: var(--radius-lg);
            border: 1px solid rgba(0, 229, 153, 0.35);
            background: var(--bg-card-dark);
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), 0 0 35px rgba(0, 229, 153, 0.15);
            overflow: hidden;
        }
        .hero-visual-img {
            width: 100%;
            height: 480px;
            object-fit: cover;
            display: block;
        }
        .hero-hud-overlay {
            position: absolute;
            inset: 0;
            pointer-events: none;
            background: linear-gradient(180deg, rgba(12, 16, 21, 0.1) 0%, rgba(12, 16, 21, 0.85) 100%);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            padding: 24px;
        }
        .hud-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .hud-badge {
            background: rgba(6, 8, 11, 0.85);
            border: 1px solid var(--accent-green);
            color: var(--accent-green);
            padding: 4px 12px;
            border-radius: var(--radius-sm);
            font-size: 0.75rem;
            font-family: monospace;
            font-weight: 700;
        }
        .hud-data-strip {
            background: rgba(12, 16, 21, 0.88);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            padding: 14px 18px;
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 12px;
            backdrop-filter: blur(10px);
        }
        .hud-stat-box span {
            display: block;
            font-size: 0.75rem;
            color: var(--text-muted-dark);
        }
        .hud-stat-box strong {
            font-size: 1.0625rem;
            color: var(--accent-green);
        }

        /* 板块二：运动算法与产品架构解构 (#product-intro) - 浅色 */
        .section-light {
            background-color: var(--bg-light);
            color: var(--text-dark);
            padding: 96px 0;
            border-bottom: 1px solid var(--border-light);
        }
        .section-light .section-desc {
            color: var(--text-muted-light);
        }
        .product-intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }
        .product-image-box {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: 0 16px 40px rgba(15, 23, 42, 0.1);
            border: 1px solid var(--border-light);
        }
        .product-image-box img {
            width: 100%;
            height: 440px;
            object-fit: cover;
        }
        .algo-feature-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 20px;
            margin-top: 28px;
        }
        .algo-item {
            display: flex;
            gap: 16px;
        }
        .algo-item-icon {
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: rgba(0, 229, 153, 0.18);
            color: #00875A;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-weight: bold;
        }
        .algo-item h4 {
            font-size: 1.125rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 4px;
        }
        .algo-item p {
            font-size: 0.9375rem;
            color: var(--text-muted-light);
            line-height: 1.7;
        }

        /* 板块三：核心技术优势矩阵 (#core-features) - 深色 */
        .section-dark {
            background-color: var(--bg-dark);
            color: var(--text-light);
            padding: 100px 0;
            border-bottom: 1px solid var(--border-dark);
        }
        .section-dark .section-desc {
            color: var(--text-muted-dark);
        }
        .feature-cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-card-dark);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            padding: 34px 28px;
            transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
            position: relative;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            border-color: var(--accent-green);
            box-shadow: 0 12px 30px rgba(0, 229, 153, 0.12);
        }
        .card-num-tag {
            font-family: monospace;
            font-size: 0.875rem;
            color: var(--accent-green);
            font-weight: 700;
            margin-bottom: 18px;
            display: inline-block;
        }
        .feature-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 14px;
            color: #FFFFFF;
        }
        .feature-card p {
            font-size: 0.9375rem;
            color: var(--text-muted-dark);
            line-height: 1.75;
        }

        /* 板块四：热门训练应用矩阵与解决方案 (#solutions-matrix) - 浅色 */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .solution-card {
            background: var(--bg-card-light);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: 0 10px 28px rgba(15, 23, 42, 0.05);
            display: flex;
            flex-direction: column;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .solution-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 18px 40px rgba(15, 23, 42, 0.1);
        }
        .solution-img-wrap {
            height: 200px;
            position: relative;
            overflow: hidden;
        }
        .solution-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .solution-body {
            padding: 28px 24px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        .solution-tag-badge {
            font-size: 0.75rem;
            font-weight: 700;
            color: #00875A;
            background: rgba(0, 229, 153, 0.12);
            padding: 3px 10px;
            border-radius: 4px;
            align-self: flex-start;
            margin-bottom: 14px;
        }
        .solution-body h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 12px;
        }
        .solution-hardware {
            font-size: 0.8125rem;
            color: var(--text-muted-light);
            background: var(--bg-light-subtle);
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            margin-bottom: 18px;
        }
        .solution-spec-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
            margin-bottom: 24px;
            flex-grow: 1;
        }
        .solution-spec-list li {
            font-size: 0.875rem;
            color: var(--text-muted-light);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .solution-spec-list li::before {
            content: '✓';
            color: #00875A;
            font-weight: 900;
        }

        /* 板块五：深色对比型技术实测 (#benchmarks-case) - 极深对比 */
        .section-contrast {
            background-color: #080B0F;
            color: var(--text-light);
            padding: 100px 0;
            border-bottom: 1px solid var(--border-dark);
        }
        .benchmark-table-wrapper {
            background: var(--bg-card-dark);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            overflow: hidden;
            margin-bottom: 40px;
        }
        .benchmark-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
        }
        .benchmark-table th, .benchmark-table td {
            padding: 20px 24px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 0.9375rem;
        }
        .benchmark-table th {
            background: #10151C;
            color: #CBD5E1;
            font-weight: 700;
            font-size: 0.875rem;
            text-transform: uppercase;
        }
        .benchmark-table td.col-metric {
            font-weight: 600;
            color: #FFFFFF;
        }
        .benchmark-table td.col-trad {
            color: var(--text-muted-dark);
        }
        .benchmark-table td.col-ai {
            color: var(--accent-green);
            font-weight: 700;
            background: rgba(0, 229, 153, 0.04);
        }

        /* 板块六：高量化运营指标看板 (#metrics-dashboard) */
        .metrics-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .metric-card {
            background: var(--bg-card-dark);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
        }
        .metric-number {
            font-size: 2.75rem;
            font-weight: 900;
            color: var(--accent-green);
            line-height: 1.15;
            margin-bottom: 8px;
            font-feature-settings: "tnum";
        }
        .metric-label {
            font-size: 0.875rem;
            color: var(--text-muted-dark);
            line-height: 1.6;
        }

        /* 板块七：真实训练突破与用户故事 (#user-stories) - 浅色 */
        .stories-container {
            display: flex;
            flex-direction: column;
            gap: 40px;
        }
        .story-card {
            background: var(--bg-card-light);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 36px;
            display: grid;
            grid-template-columns: 380px 1fr;
            gap: 40px;
            align-items: center;
            box-shadow: 0 10px 30px rgba(15, 23, 42, 0.04);
        }
        .story-img-box {
            border-radius: var(--radius-sm);
            overflow: hidden;
            height: 260px;
        }
        .story-img-box img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .story-content h3 {
            font-size: 1.45rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 12px;
        }
        .story-meta-badge {
            display: inline-block;
            font-size: 0.8125rem;
            font-weight: 600;
            color: #FF5E1E;
            margin-bottom: 14px;
        }
        .story-desc {
            font-size: 0.9375rem;
            color: var(--text-muted-light);
            line-height: 1.8;
            margin-bottom: 20px;
        }
        .story-data-badges {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }
        .story-stat-pill {
            background: var(--bg-light-subtle);
            border: 1px solid rgba(15, 23, 42, 0.08);
            border-radius: var(--radius-sm);
            padding: 8px 16px;
            font-size: 0.8125rem;
            color: var(--text-dark);
        }
        .story-stat-pill strong {
            color: #00875A;
            margin-left: 6px;
        }

        /* 板块八：运动专项发展里程碑 (#milestones) - 深色 */
        .milestones-track {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
            margin-top: 20px;
        }
        .milestone-node {
            background: var(--bg-card-dark);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            padding: 28px 22px;
            position: relative;
        }
        .milestone-version {
            font-family: monospace;
            font-size: 0.875rem;
            color: var(--accent-green);
            font-weight: 700;
            margin-bottom: 10px;
        }
        .milestone-node h4 {
            font-size: 1.15rem;
            color: #FFFFFF;
            margin-bottom: 10px;
        }
        .milestone-node p {
            font-size: 0.875rem;
            color: var(--text-muted-dark);
            line-height: 1.7;
        }

        /* 板块九：多维评价与体能专家反馈 (#testimonials) - 浅色 */
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .testi-card {
            background: var(--bg-card-light);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 32px 26px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            box-shadow: 0 10px 28px rgba(15, 23, 42, 0.04);
        }
        .testi-stars {
            color: #F59E0B;
            font-size: 1.1rem;
            margin-bottom: 16px;
        }
        .testi-quote {
            font-size: 0.9375rem;
            color: var(--text-dark);
            line-height: 1.8;
            margin-bottom: 24px;
            font-style: normal;
        }
        .testi-author {
            display: flex;
            align-items: center;
            gap: 12px;
            border-top: 1px solid rgba(15, 23, 42, 0.06);
            padding-top: 16px;
        }
        .testi-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: #E2E8F0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: #475569;
        }
        .testi-info h5 {
            font-size: 0.9375rem;
            color: var(--text-dark);
        }
        .testi-info span {
            font-size: 0.8125rem;
            color: var(--text-muted-light);
            display: block;
        }

        /* 板块十：前沿体育科技资讯与训练要点 (#news-insights) - 深色 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .news-card {
            background: var(--bg-card-dark);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: transform 0.25s ease, border-color 0.25s ease;
        }
        .news-card:hover {
            transform: translateY(-3px);
            border-color: rgba(0, 229, 153, 0.4);
        }
        .news-img-wrap {
            height: 190px;
            overflow: hidden;
        }
        .news-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .news-body {
            padding: 24px;
            display: flex;
            flex-direction: column;
            flex-grow: 1;
        }
        .news-meta {
            display: flex;
            justify-content: space-between;
            font-size: 0.75rem;
            color: var(--text-muted-dark);
            margin-bottom: 12px;
        }
        .news-category {
            color: var(--accent-green);
            font-weight: 600;
        }
        .news-body h3 {
            font-size: 1.125rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 10px;
            line-height: 1.45;
        }
        .news-summary {
            font-size: 0.875rem;
            color: var(--text-muted-dark);
            line-height: 1.7;
            margin-bottom: 18px;
            flex-grow: 1;
        }
        .news-link {
            font-size: 0.8125rem;
            color: var(--accent-green);
            font-weight: 600;
            align-self: flex-start;
        }

        /* 板块十一：平台合规保障与资质认证 (#certifications) - 浅色 */
        .cert-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .cert-card {
            background: var(--bg-card-light);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 28px 20px;
            text-align: center;
            box-shadow: 0 4px 16px rgba(15, 23, 42, 0.03);
        }
        .cert-icon {
            width: 48px;
            height: 48px;
            margin: 0 auto 16px;
            border-radius: 12px;
            background: rgba(0, 229, 153, 0.12);
            color: #00875A;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
        }
        .cert-card h4 {
            font-size: 1.0625rem;
            color: var(--text-dark);
            margin-bottom: 8px;
        }
        .cert-card p {
            font-size: 0.8125rem;
            color: var(--text-muted-light);
            line-height: 1.65;
        }

        /* 板块十二：高频技术解答手风琴 (#faq-accordion) - 深色 */
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .faq-item {
            background: var(--bg-card-dark);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color 0.25s ease;
        }
        .faq-item.is-active {
            border-color: rgba(0, 229, 153, 0.45);
        }
        .faq-header {
            width: 100%;
            background: none;
            border: none;
            padding: 22px 24px;
            text-align: left;
            color: #FFFFFF;
            font-size: 1.0625rem;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
        }
        .faq-icon {
            font-size: 1.25rem;
            color: var(--accent-green);
            transition: transform 0.25s ease;
        }
        .faq-item.is-active .faq-icon {
            transform: rotate(45deg);
        }
        .faq-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
            background: rgba(6, 8, 11, 0.5);
        }
        .faq-content {
            padding: 0 24px 22px 24px;
            font-size: 0.9375rem;
            color: #CBD5E1;
            line-height: 1.8;
        }

        /* 底部转化表单 (#contact-form) */
        .contact-section {
            background: linear-gradient(180deg, #0C1015 0%, #050709 100%);
            padding: 90px 0;
            border-top: 1px solid var(--border-dark);
        }
        .contact-box {
            background: var(--bg-card-dark);
            border: 1px solid rgba(0, 229, 153, 0.25);
            border-radius: var(--radius-lg);
            padding: 50px;
            display: grid;
            grid-template-columns: 1fr 1.1fr;
            gap: 60px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
        }
        .contact-info h2 {
            font-size: 2.1rem;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 18px;
            line-height: 1.3;
        }
        .contact-info p {
            font-size: 1rem;
            color: var(--text-muted-dark);
            line-height: 1.8;
            margin-bottom: 28px;
        }
        .contact-bullets {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .contact-bullets li {
            font-size: 0.9375rem;
            color: #CBD5E1;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .contact-bullets li::before {
            content: '✓';
            color: var(--accent-green);
            font-weight: 900;
        }

        .form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 18px;
        }
        .form-full {
            grid-column: span 2;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .form-group label {
            font-size: 0.8125rem;
            font-weight: 600;
            color: #CBD5E1;
        }
        .form-input, .form-select, .form-textarea {
            width: 100%;
            background: #090D12;
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-sm);
            padding: 12px 14px;
            color: #FFFFFF;
            font-size: 0.9375rem;
            outline: none;
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }
        .form-input:focus, .form-select:focus, .form-textarea:focus {
            border-color: var(--accent-green);
            box-shadow: 0 0 0 3px rgba(0, 229, 153, 0.15);
        }
        .form-textarea {
            resize: vertical;
            min-height: 90px;
        }
        .form-privacy-note {
            font-size: 0.75rem;
            color: #64748B;
            margin-top: 10px;
            text-align: center;
        }

        /* 页脚组件 */
        .site-footer {
            background: #05070A;
            border-top: 1px solid var(--border-dark);
            padding: 70px 0 30px;
            font-size: 0.875rem;
            color: var(--text-muted-dark);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 48px;
            margin-bottom: 50px;
        }
        .footer-brand-desc {
            font-size: 0.875rem;
            line-height: 1.8;
            margin-top: 16px;
            color: #94A3B8;
        }
        .footer-col h4 {
            font-size: 1rem;
            color: #FFFFFF;
            margin-bottom: 20px;
            font-weight: 700;
        }
        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .footer-links a:hover {
            color: var(--accent-green);
        }
        .footer-contact-item {
            margin-bottom: 10px;
            line-height: 1.6;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 28px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 0.8125rem;
        }
        .icp-link {
            color: #94A3B8;
        }
        .icp-link:hover {
            color: var(--accent-green);
        }

        /* 响应式断点适配 */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 42px;
            }
            .hero-visual-card {
                max-width: 600px;
                margin: 0 auto;
            }
            .product-intro-grid {
                grid-template-columns: 1fr;
            }
            .feature-cards-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .solutions-grid {
                grid-template-columns: 1fr;
            }
            .metrics-strip {
                grid-template-columns: repeat(2, 1fr);
            }
            .story-card {
                grid-template-columns: 1fr;
            }
            .milestones-track {
                grid-template-columns: repeat(2, 1fr);
            }
            .testimonials-grid {
                grid-template-columns: 1fr;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .cert-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .contact-box {
                grid-template-columns: 1fr;
                padding: 36px 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 72px;
            }
            .top-bar {
                display: none;
            }
            .nav-menu, .nav-cta-wrapper {
                display: none;
            }
            .mobile-toggle {
                display: flex;
            }
            .hero-content h1 {
                font-size: 2.25rem;
            }
            .section-title {
                font-size: 1.85rem;
            }
            .hero-micro-metrics {
                flex-direction: column;
                align-items: flex-start;
                gap: 16px;
            }
            .feature-cards-grid {
                grid-template-columns: 1fr;
            }
            .metrics-strip {
                grid-template-columns: 1fr;
            }
            .milestones-track {
                grid-template-columns: 1fr;
            }
            .cert-grid {
                grid-template-columns: 1fr;
            }
            .form-grid {
                grid-template-columns: 1fr;
            }
            .form-full {
                grid-column: span 1;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 520px) {
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .hud-data-strip {
                grid-template-columns: 1fr;
            }
        }