/* roulang page: index */
:root {
            --primary: #0F52BA;
            --primary-dark: #0A3A85;
            --primary-light: #EBF3FC;
            --accent: #00A86B;
            --accent-gold: #D4AF37;
            --accent-gold-dark: #AA820A;
            --action: #FF6B35;
            --action-hover: #E8551F;
            --bg-body: #F8FAFC;
            --bg-card: #FFFFFF;
            --bg-dark: #0B132B;
            --bg-dark-card: #141F3E;
            --text-main: #1E293B;
            --text-muted: #475569;
            --text-light: #94A3B8;
            --border-color: #E2E8F0;
            --border-dark: #22325E;
            --shadow-sm: 0 2px 8px rgba(15, 82, 186, 0.04);
            --shadow-md: 0 8px 24px -4px rgba(15, 82, 186, 0.08);
            --shadow-lg: 0 16px 36px -8px rgba(15, 82, 186, 0.12);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 18px;
            --font-stack: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
            --container-max: 1200px;
        }

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

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

        body {
            font-family: var(--font-stack);
            background-color: var(--bg-body);
            color: var(--text-main);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

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

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

        ul, ol {
            list-style: none;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 顶部通栏 */
        .top-utility-bar {
            background-color: #070D1E;
            color: #94A3B8;
            font-size: 0.85rem;
            padding: 8px 0;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .utility-flex {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .utility-left, .utility-right {
            display: flex;
            align-items: center;
            gap: 20px;
        }
        .utility-badge {
            background: rgba(212, 175, 55, 0.15);
            color: var(--accent-gold);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.75rem;
            border: 1px solid rgba(212, 175, 55, 0.3);
        }

        /* 主导航 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            transition: all 0.3s ease;
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 74px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.01em;
        }
        .brand-logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.2rem;
            box-shadow: 0 4px 10px rgba(15, 82, 186, 0.25);
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav-link {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-muted);
            padding: 6px 0;
            position: relative;
        }
        .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-color: var(--primary);
            border-radius: 2px;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-main);
            cursor: pointer;
        }

        /* 按钮体系 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            font-size: 0.95rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            border: 1px solid transparent;
        }
        .btn-primary {
            background-color: var(--primary);
            color: #FFFFFF;
            box-shadow: 0 4px 14px rgba(15, 82, 186, 0.24);
        }
        .btn-primary:hover {
            background-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(15, 82, 186, 0.32);
        }
        .btn-action {
            background: linear-gradient(135deg, var(--action), #FF8552);
            color: #FFFFFF;
            box-shadow: 0 4px 15px rgba(255, 107, 53, 0.3);
        }
        .btn-action:hover {
            background: linear-gradient(135deg, var(--action-hover), var(--action));
            transform: translateY(-2px);
            box-shadow: 0 6px 22px rgba(255, 107, 53, 0.4);
        }
        .btn-gold {
            background: linear-gradient(135deg, #ECC94B, #D4AF37);
            color: #1A1A1A;
            font-weight: 700;
            border: 1px solid #F6E05E;
            box-shadow: 0 4px 16px rgba(212, 175, 55, 0.3);
        }
        .btn-gold:hover {
            background: linear-gradient(135deg, #F6E05E, #ECC94B);
            transform: translateY(-2px);
            box-shadow: 0 6px 22px rgba(212, 175, 55, 0.45);
        }
        .btn-outline-light {
            background: rgba(255, 255, 255, 0.08);
            color: #FFFFFF;
            border-color: rgba(255, 255, 255, 0.25);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.18);
            border-color: #FFFFFF;
        }
        .btn-outline-primary {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline-primary:hover {
            background: var(--primary-light);
        }

        /* 标签与徽章 */
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 12px;
            font-size: 0.85rem;
            font-weight: 600;
            border-radius: 20px;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 12px;
        }
        .tag-blue {
            background-color: var(--primary-light);
            color: var(--primary);
            border: 1px solid rgba(15, 82, 186, 0.15);
        }
        .tag-dark {
            background: rgba(255, 255, 255, 0.08);
            color: var(--accent-gold);
            border: 1px solid rgba(212, 175, 55, 0.3);
        }

        /* 板块通用 */
        .site-section {
            padding: 80px 0;
            position: relative;
        }
        .section-alt {
            background-color: #FFFFFF;
        }
        .section-dark {
            background-color: var(--bg-dark);
            color: #FFFFFF;
        }
        .section-header {
            text-align: center;
            max-width: 760px;
            margin: 0 auto 50px auto;
        }
        .section-header.text-left {
            text-align: left;
            margin-left: 0;
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.01em;
            margin-bottom: 16px;
            color: var(--text-main);
        }
        .section-dark .section-title {
            color: #FFFFFF;
        }
        .section-desc {
            font-size: 1.05rem;
            color: var(--text-muted);
            line-height: 1.7;
        }
        .section-dark .section-desc {
            color: var(--text-light);
        }

        /* 1. Hero 蓝图变体：黑金俱乐部特权感 */
        .hero-section {
            position: relative;
            background: linear-gradient(135deg, #070D1E 0%, #0F1D40 50%, #17162A 100%);
            color: #FFFFFF;
            padding: 90px 0 100px 0;
            overflow: hidden;
            border-bottom: 1px solid var(--border-dark);
        }
        .hero-bg-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: url('/assets/images/4b01978009cc18c2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.18;
            mix-blend-mode: overlay;
        }
        .hero-grid {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 48px;
            align-items: center;
        }
        .hero-h1 {
            font-size: 2.85rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #FFFFFF 60%, #E2E8F0 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-lead {
            font-size: 1.1rem;
            color: #CBD5E1;
            margin-bottom: 32px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            margin-bottom: 40px;
            flex-wrap: wrap;
        }
        .hero-tier-pills {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            border-top: 1px solid rgba(255,255,255,0.12);
            padding-top: 24px;
        }
        .tier-pill {
            display: flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            padding: 6px 14px;
            border-radius: 30px;
            font-size: 0.85rem;
            color: #E2E8F0;
        }
        .tier-pill span {
            color: var(--accent-gold);
            font-weight: 700;
        }

        /* Hero 右侧尊享会员俱乐部卡片 */
        .vip-club-card {
            background: linear-gradient(145deg, #16203F, #0E162C);
            border: 1px solid rgba(212, 175, 55, 0.35);
            border-radius: var(--radius-lg);
            padding: 32px;
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
            position: relative;
        }
        .vip-badge-ribbon {
            position: absolute;
            top: -12px;
            right: 24px;
            background: linear-gradient(135deg, #ECC94B, #D4AF37);
            color: #1A1A1A;
            font-size: 0.75rem;
            font-weight: 800;
            padding: 4px 12px;
            border-radius: 4px;
            letter-spacing: 0.05em;
        }
        .vip-header {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-bottom: 24px;
        }
        .vip-avatar {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: rgba(212, 175, 55, 0.2);
            border: 2px solid var(--accent-gold);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--accent-gold);
        }
        .vip-title-wrap h3 {
            font-size: 1.2rem;
            color: #FFFFFF;
            margin-bottom: 2px;
        }
        .vip-title-wrap p {
            font-size: 0.85rem;
            color: var(--accent-gold);
        }
        .vip-privileges {
            margin-bottom: 24px;
        }
        .privilege-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 10px 0;
            border-bottom: 1px solid rgba(255,255,255,0.06);
            font-size: 0.9rem;
        }
        .privilege-item:last-child {
            border-bottom: none;
        }
        .privilege-name {
            color: #CBD5E1;
        }
        .privilege-val {
            color: var(--accent-gold);
            font-weight: 600;
        }

        /* 2. 核心指标看板 */
        .metric-dashboard-strip {
            background-color: #070E22;
            padding: 36px 0;
            border-bottom: 1px solid var(--border-dark);
        }
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .metric-item {
            text-align: center;
            padding: 16px;
            border-right: 1px solid rgba(255,255,255,0.08);
        }
        .metric-item:last-child {
            border-right: none;
        }
        .metric-num {
            font-size: 2.6rem;
            font-weight: 800;
            color: #FFFFFF;
            line-height: 1.1;
            margin-bottom: 6px;
            font-feature-settings: "tnum";
        }
        .metric-num span {
            font-size: 1.25rem;
            color: var(--accent);
            font-weight: 600;
            margin-left: 2px;
        }
        .metric-label {
            font-size: 0.95rem;
            color: #94A3B8;
            font-weight: 500;
        }

        /* 3. 全球与全域算力覆盖网络 */
        .coverage-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .coverage-img-wrap {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border-color);
        }
        .node-stat-box {
            position: absolute;
            bottom: 20px;
            left: 20px;
            right: 20px;
            background: rgba(15, 23, 42, 0.85);
            backdrop-filter: blur(8px);
            padding: 16px 20px;
            border-radius: var(--radius-sm);
            color: #FFFFFF;
            display: flex;
            justify-content: space-around;
            border: 1px solid rgba(255,255,255,0.15);
        }
        .node-stat-item {
            text-align: center;
        }
        .node-stat-item strong {
            display: block;
            font-size: 1.3rem;
            color: var(--accent-gold);
        }
        .node-stat-item span {
            font-size: 0.8rem;
            color: #94A3B8;
        }

        /* 4. 核心业务场景卡 */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .scenario-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
        }
        .scenario-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary);
        }
        .scenario-img {
            height: 180px;
            width: 100%;
            object-fit: cover;
        }
        .scenario-content {
            padding: 24px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        .scenario-content h3 {
            font-size: 1.25rem;
            margin-bottom: 12px;
            color: var(--text-main);
        }
        .scenario-content p {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-bottom: 16px;
            line-height: 1.65;
            flex-grow: 1;
        }
        .scenario-features {
            border-top: 1px solid var(--border-color);
            padding-top: 14px;
            margin-bottom: 18px;
        }
        .scenario-features li {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .scenario-features li::before {
            content: "✓";
            color: var(--accent);
            font-weight: bold;
        }

        /* 5. 本地化多云协同与交付能力 */
        .capability-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .cap-box {
            background: #FFFFFF;
            padding: 28px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            transition: all 0.3s ease;
        }
        .cap-box:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
        }
        .cap-icon {
            width: 44px;
            height: 44px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .cap-box h3 {
            font-size: 1.15rem;
            margin-bottom: 10px;
            color: var(--text-main);
        }
        .cap-box p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 6. 技术优势矩阵 (6卡片) */
        .advantage-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .adv-card {
            background: var(--bg-dark-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            padding: 28px;
            transition: all 0.3s ease;
        }
        .adv-card:hover {
            border-color: var(--accent-gold);
            transform: translateY(-4px);
        }
        .adv-card h3 {
            font-size: 1.2rem;
            color: #FFFFFF;
            margin-bottom: 10px;
        }
        .adv-card p {
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.65;
        }

        /* 7. 关键结果对比与架构演进 (左右对比看板) */
        .comparison-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            margin-bottom: 48px;
        }
        .comp-card {
            border-radius: var(--radius-md);
            padding: 32px;
            border: 1px solid var(--border-color);
        }
        .comp-card.legacy {
            background: #F1F5F9;
            border-color: #CBD5E1;
        }
        .comp-card.innovative {
            background: #FFFFFF;
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
            position: relative;
        }
        .comp-tag {
            display: inline-block;
            padding: 4px 10px;
            border-radius: 4px;
            font-size: 0.8rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .comp-tag.legacy-tag {
            background: #94A3B8;
            color: #FFFFFF;
        }
        .comp-tag.innovative-tag {
            background: var(--primary);
            color: #FFFFFF;
        }
        .comp-card h3 {
            font-size: 1.3rem;
            margin-bottom: 16px;
        }
        .comp-list li {
            padding: 12px 0;
            border-bottom: 1px solid rgba(0,0,0,0.06);
            font-size: 0.95rem;
            color: var(--text-muted);
            display: flex;
            justify-content: space-between;
        }
        .comp-list li:last-child {
            border-bottom: none;
        }
        .comp-list strong {
            color: var(--text-main);
        }

        /* 8. 平台架构演进里程碑 (时间线) */
        .timeline-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }
        .timeline-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px;
            position: relative;
        }
        .timeline-item::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: var(--primary);
            border-top-left-radius: var(--radius-md);
            border-top-right-radius: var(--radius-md);
        }
        .timeline-year {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .timeline-item h4 {
            font-size: 1.05rem;
            margin-bottom: 8px;
            color: var(--text-main);
        }
        .timeline-item p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 9. 客户案例与效能复盘 */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .case-card {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            padding: 28px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            box-shadow: var(--shadow-sm);
        }
        .case-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }
        .case-icon {
            width: 38px;
            height: 38px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
        }
        .case-header h3 {
            font-size: 1.15rem;
            color: var(--text-main);
        }
        .case-body p {
            font-size: 0.92rem;
            color: var(--text-muted);
            margin-bottom: 16px;
            line-height: 1.65;
        }
        .case-stat-pill {
            background: #F1F5F9;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            font-size: 0.88rem;
            color: var(--text-main);
            display: flex;
            justify-content: space-between;
            font-weight: 600;
        }
        .case-stat-pill span {
            color: var(--primary);
        }

        /* 10. 前沿技术资讯与白皮书 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .news-card {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: all 0.3s ease;
        }
        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .news-thumb {
            height: 180px;
            width: 100%;
            object-fit: cover;
        }
        .news-body {
            padding: 22px;
        }
        .news-meta {
            font-size: 0.8rem;
            color: var(--text-light);
            margin-bottom: 8px;
            display: flex;
            justify-content: space-between;
        }
        .news-body h3 {
            font-size: 1.15rem;
            color: var(--text-main);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .news-body p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 11. 安全合规与可信认证保障 */
        .trust-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .trust-card {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px;
            text-align: center;
        }
        .trust-icon-box {
            width: 52px;
            height: 52px;
            margin: 0 auto 16px auto;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: bold;
        }
        .trust-card h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
            color: var(--text-main);
        }
        .trust-card p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 12. 咨询试用与算力对接表单 (收口转化) */
        .lead-section {
            background: linear-gradient(135deg, #070D1E, #0F1E44);
            color: #FFFFFF;
            padding: 90px 0;
            border-top: 1px solid var(--border-dark);
        }
        .lead-container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .lead-form-box {
            background: #FFFFFF;
            color: var(--text-main);
            padding: 36px;
            border-radius: var(--radius-md);
            box-shadow: 0 20px 40px rgba(0,0,0,0.3);
        }
        .lead-form-box h3 {
            font-size: 1.4rem;
            margin-bottom: 8px;
            color: var(--text-main);
        }
        .lead-form-box p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 24px;
        }
        .form-group {
            margin-bottom: 16px;
        }
        .form-label {
            display: block;
            font-size: 0.88rem;
            font-weight: 600;
            margin-bottom: 6px;
            color: var(--text-main);
        }
        .form-control {
            width: 100%;
            padding: 12px 14px;
            font-size: 0.95rem;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            background-color: #F8FAFC;
            color: var(--text-main);
            font-family: inherit;
            outline: none;
            transition: all 0.2s ease;
        }
        .form-control:focus {
            border-color: var(--primary);
            background-color: #FFFFFF;
            box-shadow: 0 0 0 3px rgba(15, 82, 186, 0.15);
        }
        .form-privacy {
            font-size: 0.8rem;
            color: var(--text-light);
            margin-top: 12px;
            line-height: 1.5;
        }

        /* 浮动吸底转化条 */
        .sticky-bottom-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            width: 100%;
            background: rgba(11, 19, 43, 0.95);
            backdrop-filter: blur(10px);
            color: #FFFFFF;
            padding: 14px 0;
            z-index: 990;
            border-top: 1px solid rgba(255,255,255,0.15);
            box-shadow: 0 -4px 20px rgba(0,0,0,0.25);
            transform: translateY(100%);
            transition: transform 0.3s ease;
        }
        .sticky-bottom-bar.is-visible {
            transform: translateY(0);
        }
        .sticky-bar-flex {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .sticky-bar-text {
            font-size: 0.95rem;
            color: #CBD5E1;
        }
        .sticky-bar-text strong {
            color: var(--accent-gold);
        }

        /* 页脚 */
        .site-footer {
            background-color: #050914;
            color: #94A3B8;
            padding: 70px 0 30px 0;
            font-size: 0.9rem;
            border-top: 1px solid rgba(255,255,255,0.06);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 50px;
        }
        .footer-brand h4 {
            color: #FFFFFF;
            font-size: 1.25rem;
            margin-bottom: 14px;
            font-weight: 700;
        }
        .footer-brand p {
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .footer-col h4 {
            color: #FFFFFF;
            font-size: 1rem;
            margin-bottom: 18px;
            font-weight: 600;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a:hover {
            color: #FFFFFF;
            padding-left: 4px;
        }
        .footer-bottom {
            padding-top: 30px;
            border-top: 1px solid rgba(255,255,255,0.08);
            text-align: center;
            font-size: 0.85rem;
            color: #64748B;
            line-height: 1.8;
        }

        /* 响应式断点 */
        @media (max-width: 1024px) {
            .hero-grid, .coverage-layout, .comparison-wrap, .lead-container {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .scenario-grid, .capability-grid, .advantage-grid, .cases-grid, .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .metrics-grid, .timeline-grid, .trust-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .top-utility-bar {
                display: none;
            }
            .nav-menu {
                display: none;
                position: absolute;
                top: 74px;
                left: 0;
                width: 100%;
                background: #FFFFFF;
                flex-direction: column;
                padding: 20px;
                box-shadow: 0 10px 20px rgba(0,0,0,0.1);
                border-bottom: 1px solid var(--border-color);
            }
            .nav-menu.open {
                display: flex;
            }
            .mobile-toggle {
                display: block;
            }
            .hero-h1 {
                font-size: 2.1rem;
            }
            .section-title {
                font-size: 1.75rem;
            }
            .scenario-grid, .capability-grid, .advantage-grid, .cases-grid, .news-grid, .metrics-grid, .timeline-grid, .trust-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .sticky-bar-flex {
                flex-direction: column;
                gap: 12px;
                text-align: center;
            }
        }