/* roulang page: index */
:root {
            --bg-base: #0a0d14;
            --bg-elevated: #101726;
            --bg-card: #151d30;
            --border-color: rgba(255, 255, 255, 0.08);
            --border-hover: rgba(16, 185, 129, 0.4);
            --text-main: #f8fafc;
            --text-muted: #94a3b8;
            --text-dim: #64748b;
            --accent-green: #10b981;
            --accent-cyan: #06b6d4;
            --accent-amber: #f59e0b;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 18px;
            --container-max: 1280px;
            --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }

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

        body {
            background-color: var(--bg-base);
            color: var(--text-main);
            font-family: var(--font-sans);
            font-size: 15px;
            line-height: 1.6;
            -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;
        }

        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        .tabular-num {
            font-variant-numeric: tabular-nums;
            font-feature-settings: "tnum";
        }

        /* 顶部两层导航 */
        .top-status-bar {
            background: #060910;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            font-size: 0.8rem;
            color: var(--text-dim);
            padding: 0.4rem 0;
        }

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

        .status-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--text-muted);
        }

        .status-dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background-color: var(--accent-green);
            box-shadow: 0 0 8px var(--accent-green);
            animation: pulseDot 2s infinite;
        }

        @keyframes pulseDot {
            0% { transform: scale(0.95); opacity: 0.8; }
            50% { transform: scale(1.2); opacity: 1; }
            100% { transform: scale(0.95); opacity: 0.8; }
        }

        header.site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            background-color: rgba(10, 13, 20, 0.85);
            border-bottom: 1px solid var(--border-color);
        }

        .navbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 1.15rem;
            font-weight: 700;
            letter-spacing: -0.01em;
            color: var(--text-main);
        }

        .brand-logo svg {
            width: 32px;
            height: 32px;
            fill: var(--accent-green);
        }

        .nav-links {
            display: flex;
            align-items: center;
            list-style: none;
            gap: 2rem;
        }

        .nav-links a {
            color: var(--text-muted);
            font-weight: 500;
            font-size: 0.95rem;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.65rem 1.4rem;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
            border: 1px solid transparent;
            text-align: center;
        }

        .btn-primary {
            background-color: var(--accent-green);
            color: #042417;
            box-shadow: 0 4px 14px rgba(16, 185, 129, 0.25);
        }

        .btn-primary:hover {
            background-color: #34d399;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
        }

        .btn-secondary {
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-main);
            border-color: var(--border-color);
        }

        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: var(--accent-cyan);
            color: #fff;
        }

        /* 基础 Section 排版与视觉 */
        section {
            padding: 5.5rem 0;
            border-bottom: 1px solid var(--border-color);
            position: relative;
        }

        .section-header {
            margin-bottom: 3rem;
        }

        .section-header.text-center {
            text-align: center;
            max-width: 780px;
            margin-left: auto;
            margin-right: auto;
        }

        .section-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--accent-green);
            margin-bottom: 0.75rem;
            padding: 0.2rem 0.6rem;
            background: rgba(16, 185, 129, 0.1);
            border: 1px solid rgba(16, 185, 129, 0.2);
            border-radius: var(--radius-sm);
        }

        .section-title {
            font-size: 2.15rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            line-height: 1.25;
            color: var(--text-main);
            margin-bottom: 1rem;
        }

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

        /* 1. 首屏全宽矮横幅 (Hero Banner) */
        .hero-banner-section {
            padding: 3.5rem 0 4rem;
            background: radial-gradient(circle at 80% 20%, rgba(6, 182, 212, 0.12), transparent 45%),
                        radial-gradient(circle at 10% 70%, rgba(16, 185, 129, 0.08), transparent 50%),
                        var(--bg-base);
            position: relative;
            overflow: hidden;
        }

        .hero-strip {
            display: grid;
            grid-template-columns: 1.25fr 0.95fr;
            align-items: center;
            gap: 3rem;
        }

        .hero-title {
            font-size: 2.85rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            line-height: 1.15;
            margin-bottom: 1.25rem;
            color: #ffffff;
        }

        .hero-title span {
            background: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-summary {
            font-size: 1.05rem;
            color: var(--text-muted);
            line-height: 1.75;
            margin-bottom: 2rem;
            max-width: 620px;
        }

        .hero-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .hero-preview-frame {
            background: var(--bg-elevated);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 1.25rem;
            box-shadow: 0 20px 40px rgba(0,0,0,0.4);
            position: relative;
        }

        .hero-preview-frame img {
            border-radius: var(--radius-sm);
            width: 100%;
            height: 260px;
            object-fit: cover;
            border: 1px solid rgba(255, 255, 255, 0.05);
        }

        .hero-metrics-pill {
            position: absolute;
            bottom: -15px;
            right: 25px;
            background: #111a2e;
            border: 1px solid var(--border-hover);
            border-radius: var(--radius-sm);
            padding: 0.6rem 1rem;
            display: flex;
            gap: 1.5rem;
            box-shadow: 0 10px 25px rgba(0,0,0,0.5);
        }

        .hero-metrics-pill .pill-item {
            display: flex;
            flex-direction: column;
        }

        .hero-metrics-pill .pill-item span:first-child {
            font-size: 0.75rem;
            color: var(--text-dim);
        }

        .hero-metrics-pill .pill-item span:last-child {
            font-size: 1rem;
            font-weight: 700;
            color: var(--accent-green);
        }

        /* 2. 双列架构解析区 */
        .arch-split-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3.5rem;
            align-items: center;
        }

        .spec-list {
            margin-top: 1.5rem;
            display: flex;
            flex-direction: column;
            gap: 1.25rem;
        }

        .spec-item {
            background: var(--bg-elevated);
            border-left: 3px solid var(--accent-cyan);
            padding: 1rem 1.25rem;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        }

        .spec-item h4 {
            font-size: 1rem;
            margin-bottom: 0.35rem;
            color: #fff;
        }

        .spec-item p {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* 3. 核心服务矩阵网格 (3x2) */
        .matrix-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.75rem;
        }

        .matrix-card {
            background: var(--bg-elevated);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 2rem;
            transition: transform 0.25s ease, border-color 0.25s ease;
        }

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

        .matrix-icon {
            width: 44px;
            height: 44px;
            background: rgba(16, 185, 129, 0.12);
            color: var(--accent-green);
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            margin-bottom: 1.25rem;
            font-weight: 700;
            font-size: 1.2rem;
        }

        .matrix-card h3 {
            font-size: 1.2rem;
            margin-bottom: 0.75rem;
            color: #fff;
        }

        .matrix-card p {
            color: var(--text-muted);
            font-size: 0.92rem;
            line-height: 1.65;
        }

        /* 4. 技术优势交错对比 */
        .advantage-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }

        .adv-card {
            background: linear-gradient(180deg, #121929 0%, #0c121e 100%);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 2.2rem;
        }

        .adv-tag {
            font-size: 0.8rem;
            color: var(--accent-cyan);
            font-weight: 600;
            margin-bottom: 0.75rem;
            display: block;
        }

        .adv-card h3 {
            font-size: 1.3rem;
            margin-bottom: 0.85rem;
            color: #fff;
        }

        .adv-card p {
            color: var(--text-muted);
            font-size: 0.92rem;
            line-height: 1.7;
        }

        /* 5. 三大产品套件区 (中卡高亮) */
        .suites-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
            align-items: stretch;
        }

        .suite-card {
            background: var(--bg-elevated);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 2.5rem 2rem;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .suite-card.highlight {
            background: linear-gradient(180deg, #152238 0%, #10192a 100%);
            border-color: var(--accent-green);
            box-shadow: 0 10px 30px rgba(16, 185, 129, 0.15);
            transform: scale(1.02);
            position: relative;
        }

        .suite-badge {
            display: inline-block;
            background: var(--accent-green);
            color: #062115;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 0.2rem 0.6rem;
            border-radius: 4px;
            margin-bottom: 1rem;
            width: fit-content;
        }

        .suite-title {
            font-size: 1.45rem;
            color: #fff;
            margin-bottom: 0.5rem;
        }

        .suite-desc {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-bottom: 1.5rem;
        }

        .suite-features {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.85rem;
            margin-bottom: 2rem;
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        .suite-features li::before {
            content: "✓";
            color: var(--accent-green);
            margin-right: 8px;
            font-weight: bold;
        }

        /* 6. 深色闭环图谱区 */
        .blueprint-section {
            background: #06080d;
            border-color: rgba(255, 255, 255, 0.04);
        }

        .flow-container {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            position: relative;
            margin-top: 2rem;
        }

        .flow-step {
            background: #0d121c;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 1.75rem 1.25rem;
            position: relative;
        }

        .step-index {
            font-size: 0.85rem;
            font-weight: 800;
            color: var(--accent-amber);
            margin-bottom: 0.75rem;
            display: block;
        }

        .flow-step h4 {
            font-size: 1.1rem;
            margin-bottom: 0.5rem;
            color: #fff;
        }

        .flow-step p {
            color: var(--text-muted);
            font-size: 0.88rem;
            line-height: 1.6;
        }

        /* 7. 实战用户故事 */
        .story-container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2.5rem;
            align-items: center;
            background: var(--bg-elevated);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 3rem;
        }

        .story-content h3 {
            font-size: 1.65rem;
            color: #fff;
            margin-bottom: 1rem;
            line-height: 1.35;
        }

        .story-content p {
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 1.5rem;
        }

        .story-stats {
            display: flex;
            gap: 2.5rem;
            border-top: 1px solid var(--border-color);
            padding-top: 1.5rem;
        }

        .story-stat-val {
            font-size: 1.85rem;
            font-weight: 700;
            color: var(--accent-green);
        }

        .story-stat-lbl {
            font-size: 0.85rem;
            color: var(--text-dim);
        }

        /* 8. 关键业务表现条 */
        .metrics-bar-section {
            background: linear-gradient(90deg, #0f1624 0%, #151f33 100%);
            padding: 3.5rem 0;
        }

        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            text-align: center;
        }

        .metric-item-num {
            font-size: 3rem;
            font-weight: 800;
            color: #fff;
            line-height: 1;
            margin-bottom: 0.65rem;
            letter-spacing: -0.03em;
        }

        .metric-item-num span {
            color: var(--accent-green);
        }

        .metric-item-label {
            color: var(--text-muted);
            font-size: 0.95rem;
            font-weight: 500;
        }

        /* 9. 专家评价区 */
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }

        .testi-card {
            background: var(--bg-elevated);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 2.2rem;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .testi-quote {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 1.75rem;
            position: relative;
        }

        .testi-author {
            display: flex;
            align-items: center;
            gap: 12px;
            border-top: 1px solid var(--border-color);
            padding-top: 1.25rem;
        }

        .author-meta h4 {
            font-size: 0.95rem;
            color: #fff;
        }

        .author-meta p {
            font-size: 0.8rem;
            color: var(--text-dim);
        }

        /* 10. 深度资讯与洞察 */
        .insights-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }

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

        .insight-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }

        .insight-body {
            padding: 1.5rem;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .insight-tag-bar {
            display: flex;
            justify-content: space-between;
            font-size: 0.75rem;
            margin-bottom: 0.75rem;
            color: var(--text-dim);
        }

        .insight-tag {
            color: var(--accent-cyan);
            font-weight: 600;
        }

        .insight-title {
            font-size: 1.15rem;
            color: #fff;
            margin-bottom: 0.65rem;
            line-height: 1.4;
        }

        .insight-summary {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 1.25rem;
            flex: 1;
        }

        .insight-link {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent-green);
        }

        /* 11. 常见问题手风琴 */
        .faq-wrapper {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .faq-item {
            background: var(--bg-elevated);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            overflow: hidden;
        }

        .faq-summary {
            padding: 1.25rem 1.5rem;
            font-weight: 600;
            color: #fff;
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
        }

        .faq-summary::-webkit-details-marker {
            display: none;
        }

        .faq-summary::after {
            content: "+";
            font-size: 1.25rem;
            color: var(--accent-green);
            transition: transform 0.25s ease;
        }

        details[open] .faq-summary::after {
            content: "−";
        }

        .faq-answer {
            padding: 0 1.5rem 1.25rem 1.5rem;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
            border-top: 1px solid rgba(255, 255, 255, 0.03);
        }

        /* 12. 底座合规与SLA保障条 */
        .compliance-bar {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }

        .compliance-card {
            background: #0d1321;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 1.25rem;
            text-align: center;
        }

        .compliance-card h4 {
            font-size: 0.95rem;
            color: #fff;
            margin-bottom: 0.35rem;
        }

        .compliance-card p {
            font-size: 0.82rem;
            color: var(--text-dim);
        }

        /* 行动召唤区 (CTA) */
        .cta-section {
            background: radial-gradient(circle at 50% 50%, rgba(16, 185, 129, 0.12), transparent 70%), #0c101a;
            text-align: center;
            padding: 5.5rem 0;
        }

        .cta-box {
            max-width: 680px;
            margin: 0 auto;
        }

        .cta-box h2 {
            font-size: 2.3rem;
            color: #fff;
            margin-bottom: 1rem;
            letter-spacing: -0.02em;
        }

        .cta-box p {
            color: var(--text-muted);
            font-size: 1.05rem;
            margin-bottom: 2rem;
        }

        .cta-form {
            display: flex;
            gap: 0.75rem;
            justify-content: center;
            max-width: 520px;
            margin: 0 auto;
        }

        .cta-input {
            flex: 1;
            padding: 0.85rem 1.2rem;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.15);
            background: #080b12;
            color: #fff;
            font-size: 0.95rem;
            outline: none;
            transition: border-color 0.25s ease;
        }

        .cta-input:focus {
            border-color: var(--accent-green);
            box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
        }

        /* 页脚系统 */
        footer.site-footer {
            background: #07090f;
            border-top: 1px solid var(--border-color);
            padding: 4.5rem 0 2rem;
            font-size: 0.9rem;
            color: var(--text-dim);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.25fr;
            gap: 3rem;
            margin-bottom: 3.5rem;
        }

        .footer-brand h3 {
            font-size: 1.2rem;
            color: #fff;
            margin-bottom: 1rem;
        }

        .footer-brand p {
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 1.5rem;
        }

        .footer-col h4 {
            font-size: 0.95rem;
            color: #fff;
            margin-bottom: 1.25rem;
            font-weight: 600;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }

        .footer-col a:hover {
            color: var(--accent-green);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.82rem;
        }

        /* 响应式断点 */
        @media (max-width: 1024px) {
            .hero-strip {
                grid-template-columns: 1fr;
                gap: 2.5rem;
            }
            .matrix-grid, .advantage-grid, .suites-grid, .testimonials-grid, .insights-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .arch-split-grid, .story-container {
                grid-template-columns: 1fr;
            }
            .flow-container, .metrics-grid, .compliance-bar {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .top-status-bar {
                display: none;
            }
            .navbar {
                height: 60px;
            }
            .nav-links {
                display: none;
            }
            .hero-title {
                font-size: 2.15rem;
            }
            .matrix-grid, .advantage-grid, .suites-grid, .testimonials-grid, .insights-grid, .flow-container, .metrics-grid, .compliance-bar {
                grid-template-columns: 1fr;
            }
            .suite-card.highlight {
                transform: none;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .cta-form {
                flex-direction: column;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 1rem;
                text-align: center;
            }
        }