/* roulang page: index */
:root {
            --bg-canvas: #0A0E17;
            --bg-surface-1: #121826;
            --bg-surface-2: #1B2236;
            --neon-green: #00FF87;
            --neon-cyan: #60EFFF;
            --text-primary: #F1F5F9;
            --text-secondary: #94A3B8;
            --border-dim: rgba(96, 239, 255, 0.15);
            --border-glow: rgba(0, 255, 135, 0.5);
            --radius-md: 8px;
            --radius-sm: 4px;
            --radius-full: 9999px;
            --transition-smooth: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }

        /* 基础重置与排版 */
        * { box-sizing: border-box; }
        body {
            background-color: var(--bg-canvas);
            color: var(--text-primary);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Noto Sans", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            line-height: 1.75;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }
        h1, h2, h3, h4, h5, h6 {
            color: var(--text-primary);
            font-weight: 700;
            line-height: 1.3;
            margin-top: 0;
        }
        p {
            color: var(--text-secondary);
            margin-bottom: 1.25rem;
        }
        a {
            color: var(--neon-cyan);
            text-decoration: none;
            transition: var(--transition-smooth);
        }
        a:hover, a:focus {
            color: var(--neon-green);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        /* 容器宽度 */
        .container-custom {
            max-width: 75rem;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }

        /* 顶部两行导航 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(10, 14, 23, 0.95);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-dim);
        }
        .top-bar-info {
            background: rgba(18, 24, 38, 0.8);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            font-size: 0.8125rem;
            padding: 0.35rem 0;
            color: var(--text-secondary);
        }
        .top-bar-info .status-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            background: var(--neon-green);
            border-radius: 50%;
            margin-right: 6px;
            box-shadow: 0 0 8px var(--neon-green);
        }
        .main-nav {
            padding: 0.875rem 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .logo-box {
            font-size: 1.35rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .logo-box .glow-dot {
            width: 12px;
            height: 12px;
            background: var(--neon-green);
            border-radius: 2px;
            box-shadow: 0 0 10px var(--neon-green);
            transform: rotate(45deg);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 1.75rem;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-links a {
            color: var(--text-secondary);
            font-size: 0.9375rem;
            font-weight: 500;
            position: relative;
            padding: 0.5rem 0;
        }
        .nav-links a:hover, .nav-links a.active {
            color: var(--neon-green);
            text-shadow: 0 0 8px rgba(0, 255, 135, 0.4);
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--neon-green);
            box-shadow: 0 0 8px var(--neon-green);
        }

        /* 按钮体系 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 0.9375rem;
            font-weight: 600;
            padding: 0.625rem 1.375rem;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition-smooth);
            border: 1px solid transparent;
            min-height: 44px;
        }
        .btn-neon {
            background: var(--neon-green);
            color: #05140b;
            box-shadow: 0 0 15px rgba(0, 255, 135, 0.3);
        }
        .btn-neon:hover {
            background: #26ff98;
            color: #000;
            box-shadow: 0 0 25px rgba(0, 255, 135, 0.6);
            transform: translateY(-2px);
        }
        .btn-outline {
            background: rgba(96, 239, 255, 0.05);
            color: var(--neon-cyan);
            border-color: var(--border-dim);
        }
        .btn-outline:hover {
            background: rgba(96, 239, 255, 0.15);
            border-color: var(--neon-cyan);
            color: #fff;
            transform: translateY(-2px);
        }

        /* 板块公用规范 */
        section {
            padding: 5rem 0;
            position: relative;
        }
        .section-alt {
            background-color: var(--bg-surface-1);
        }
        .section-title-wrap {
            margin-bottom: 3.5rem;
        }
        .section-badge {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--neon-green);
            background: rgba(0, 255, 135, 0.1);
            border: 1px solid rgba(0, 255, 135, 0.3);
            padding: 0.25rem 0.75rem;
            border-radius: var(--radius-full);
            margin-bottom: 0.75rem;
        }
        .section-heading {
            font-size: 2.125rem;
            letter-spacing: -0.5px;
            margin-bottom: 0.75rem;
        }
        .section-desc {
            max-width: 48rem;
            font-size: 1.05rem;
            line-height: 1.7;
            color: var(--text-secondary);
        }

        /* 统一卡片 */
        .card-tech {
            background: var(--bg-surface-2);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-md);
            padding: 1.75rem;
            transition: var(--transition-smooth);
            height: 100%;
        }
        .card-tech:hover {
            border-color: var(--neon-green);
            transform: translateY(-4px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5), 0 0 15px rgba(0, 255, 135, 0.15);
        }

        /* 1. Hero 屏 (左文右图 5:7 错位) */
        #hero {
            padding: 6.5rem 0 5rem 0;
            background: radial-gradient(circle at 80% 20%, rgba(0, 255, 135, 0.08) 0%, transparent 60%),
                        radial-gradient(circle at 10% 50%, rgba(96, 239, 255, 0.05) 0%, transparent 50%),
                        var(--bg-canvas);
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 5fr 7fr;
            gap: 3.5rem;
            align-items: center;
        }
        .hero-left h1 {
            font-size: 2.75rem;
            line-height: 1.2;
            margin-bottom: 1.25rem;
            letter-spacing: -1px;
        }
        .hero-lead {
            font-size: 1.05rem;
            line-height: 1.75;
            color: var(--text-secondary);
            margin-bottom: 2rem;
        }
        .hero-cta-group {
            display: flex;
            gap: 1rem;
            margin-bottom: 2.5rem;
        }
        .hero-kpis {
            display: flex;
            gap: 2rem;
            border-top: 1px solid var(--border-dim);
            padding-top: 1.5rem;
        }
        .kpi-num {
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--neon-cyan);
            line-height: 1.1;
        }
        .kpi-lbl {
            font-size: 0.8125rem;
            color: var(--text-secondary);
        }
        .hero-right-visual {
            position: relative;
        }
        .hero-image-wrap {
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-dim);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
            transform: perspective(1000px) rotateY(-4deg) rotateX(2deg);
            transition: var(--transition-smooth);
        }
        .hero-image-wrap:hover {
            transform: perspective(1000px) rotateY(0) rotateX(0);
        }

        /* 2. 资料目录 / 模块索引 (#catalog) */
        .catalog-table-wrap {
            background: var(--bg-surface-2);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-dim);
            overflow: hidden;
        }
        .catalog-row {
            display: grid;
            grid-template-columns: 2fr 4fr 3fr 2fr;
            padding: 1.25rem 1.75rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            align-items: center;
        }
        .catalog-row:last-child { border-bottom: none; }
        .catalog-header {
            background: rgba(255, 255, 255, 0.02);
            font-weight: 600;
            color: var(--neon-cyan);
            font-size: 0.875rem;
        }
        .catalog-type {
            font-weight: 600;
            color: var(--text-primary);
        }
        .catalog-tag {
            display: inline-block;
            font-size: 0.75rem;
            padding: 0.15rem 0.5rem;
            background: rgba(96, 239, 255, 0.1);
            color: var(--neon-cyan);
            border-radius: var(--radius-sm);
        }

        /* 3. 卖点三连 / 核心价值点 (#values) */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.75rem;
        }
        .value-card-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: rgba(0, 255, 135, 0.1);
            border: 1px solid rgba(0, 255, 135, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--neon-green);
            font-size: 1.25rem;
            margin-bottom: 1.25rem;
        }

        /* 4. 关键图表与指标条 (#metrics) */
        .metrics-banner {
            background: linear-gradient(180deg, rgba(18, 24, 38, 0.9) 0%, rgba(10, 14, 23, 0.9) 100%);
            border-top: 1px solid var(--border-dim);
            border-bottom: 1px solid var(--border-dim);
            padding: 3.5rem 0;
        }
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            text-align: center;
        }
        .metric-big {
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
            font-size: 2.75rem;
            font-weight: 800;
            color: var(--neon-green);
            line-height: 1.1;
            margin-bottom: 0.5rem;
            text-shadow: 0 0 15px rgba(0, 255, 135, 0.2);
        }
        .metric-sub {
            font-size: 0.875rem;
            color: var(--text-secondary);
        }

        /* 5. 产品套件矩阵 (#products) */
        .product-badge {
            float: right;
            font-size: 0.75rem;
            padding: 0.2rem 0.6rem;
            border-radius: var(--radius-sm);
            background: rgba(0, 255, 135, 0.1);
            color: var(--neon-green);
            border: 1px solid rgba(0, 255, 135, 0.2);
        }
        .feature-bullets {
            list-style: none;
            padding: 0;
            margin: 1.25rem 0;
        }
        .feature-bullets li {
            font-size: 0.875rem;
            color: var(--text-secondary);
            margin-bottom: 0.5rem;
            position: relative;
            padding-left: 1.25rem;
        }
        .feature-bullets li::before {
            content: '▹';
            position: absolute;
            left: 0;
            color: var(--neon-cyan);
        }

        /* 6. 业务场景演示 (#scenarios) */
        .scenario-box {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2.5rem;
            align-items: center;
            background: var(--bg-surface-2);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-dim);
            padding: 2.5rem;
        }
        .step-timeline {
            position: relative;
            border-left: 2px solid rgba(96, 239, 255, 0.2);
            padding-left: 1.5rem;
            margin-top: 1.5rem;
        }
        .step-item {
            margin-bottom: 1.5rem;
            position: relative;
        }
        .step-item::before {
            content: '';
            position: absolute;
            left: calc(-1.5rem - 5px);
            top: 6px;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--neon-cyan);
            box-shadow: 0 0 6px var(--neon-cyan);
        }
        .step-title {
            font-weight: 600;
            color: var(--text-primary);
            font-size: 0.95rem;
        }

        /* 7. 深色核心技术架构与协议剖析 (#technology) */
        .arch-console {
            background: #06090e;
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-md);
            padding: 2rem;
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
        }
        .terminal-header {
            display: flex;
            gap: 6px;
            margin-bottom: 1.5rem;
            padding-bottom: 0.75rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .term-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
        }
        .term-dot-red { background: #ff5f56; }
        .term-dot-yellow { background: #ffbd2e; }
        .term-dot-green { background: #27c93f; }
        .console-line {
            font-size: 0.875rem;
            color: var(--text-secondary);
            margin-bottom: 0.6rem;
            display: flex;
            gap: 1rem;
        }
        .console-line .code-green { color: var(--neon-green); }
        .console-line .code-cyan { color: var(--neon-cyan); }

        /* 8. 前后落地对比 (#comparison) */
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
        }
        .comp-card {
            border-radius: var(--radius-md);
            padding: 2rem;
            border: 1px solid var(--border-dim);
        }
        .comp-before {
            background: rgba(18, 24, 38, 0.5);
            border-left: 4px solid #ef4444;
        }
        .comp-after {
            background: var(--bg-surface-2);
            border-left: 4px solid var(--neon-green);
        }

        /* 9. 社会认同与行业口碑 (#reviews) */
        .review-card {
            background: var(--bg-surface-2);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-md);
            padding: 1.75rem;
            position: relative;
        }
        .rating-stars {
            color: #fbbf24;
            font-size: 0.875rem;
            margin-bottom: 0.75rem;
        }
        .review-author {
            margin-top: 1.25rem;
            padding-top: 1rem;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .author-corp {
            font-weight: 600;
            color: var(--text-primary);
            font-size: 0.875rem;
        }
        .author-role {
            font-size: 0.75rem;
            color: var(--text-secondary);
        }

        /* 10. 权威资讯与算法演进 (#news) */
        .news-thumb {
            border-radius: var(--radius-sm);
            overflow: hidden;
            margin-bottom: 1.25rem;
            border: 1px solid rgba(255, 255, 255, 0.05);
        }
        .news-thumb img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            transition: var(--transition-smooth);
        }
        .card-tech:hover .news-thumb img {
            transform: scale(1.05);
        }
        .news-date {
            font-size: 0.75rem;
            color: var(--neon-cyan);
            margin-bottom: 0.5rem;
            display: inline-block;
        }

        /* 11. 常见技术异议拆解 (#faq) */
        .faq-accordion {
            max-width: 54rem;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-surface-2);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-md);
            margin-bottom: 1rem;
            overflow: hidden;
        }
        .faq-question {
            padding: 1.25rem 1.75rem;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: rgba(255, 255, 255, 0.01);
        }
        .faq-question:hover {
            color: var(--neon-green);
        }
        .faq-answer {
            padding: 0 1.75rem 1.5rem 1.75rem;
            font-size: 0.9375rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* 12. 行动召唤与保障表单 (#cta) */
        #cta {
            background: radial-gradient(circle at 50% 100%, rgba(0, 255, 135, 0.1) 0%, transparent 60%),
                        var(--bg-surface-1);
            border-top: 1px solid var(--border-dim);
        }
        .cta-box {
            max-width: 44rem;
            margin: 0 auto;
            text-align: center;
        }
        .cta-form {
            display: flex;
            gap: 0.75rem;
            margin-top: 2rem;
            margin-bottom: 2rem;
        }
        .cta-input {
            flex: 1;
            background: var(--bg-surface-2);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-sm);
            padding: 0.75rem 1.25rem;
            color: #fff;
            outline: none;
            font-size: 0.9375rem;
        }
        .cta-input:focus {
            border-color: var(--neon-green);
            box-shadow: 0 0 10px rgba(0, 255, 135, 0.2);
        }
        .guarantee-badges {
            display: flex;
            justify-content: center;
            gap: 2rem;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }
        .badge-item {
            font-size: 0.8125rem;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .badge-item span {
            color: var(--neon-green);
            font-weight: bold;
        }

        /* 底部常驻悬浮转化条 */
        .floating-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: rgba(18, 24, 38, 0.95);
            backdrop-filter: blur(10px);
            border-top: 1px solid var(--border-glow);
            padding: 0.75rem 0;
            z-index: 999;
            transform: translateY(100%);
            transition: var(--transition-smooth);
        }
        .floating-bar.active {
            transform: translateY(0);
        }
        .float-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        /* 页脚规范 */
        .site-footer {
            background: #06090e;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 4rem 0 2rem 0;
            font-size: 0.875rem;
            color: var(--text-secondary);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 3rem;
            margin-bottom: 3rem;
        }
        .footer-col h4 {
            font-size: 0.9375rem;
            color: var(--text-primary);
            margin-bottom: 1rem;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 0.5rem;
        }
        .footer-links a {
            color: var(--text-secondary);
        }
        .footer-links a:hover {
            color: var(--neon-green);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 2rem;
            text-align: center;
            font-size: 0.8125rem;
        }

        /* 响应式断点适配 */
        @media (max-width: 1024px) {
            .hero-grid { grid-template-columns: 1fr; gap: 2.5rem; }
            .grid-3 { grid-template-columns: repeat(2, 1fr); }
            .metrics-grid { grid-template-columns: repeat(2, 1fr); }
            .scenario-box { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
        }
        @media (max-width: 640px) {
            section { padding: 3rem 0; }
            .hero-left h1 { font-size: 2rem; }
            .grid-3 { grid-template-columns: 1fr; }
            .grid-2 { grid-template-columns: 1fr; }
            .metrics-grid { grid-template-columns: 1fr; }
            .catalog-row { grid-template-columns: 1fr; gap: 0.5rem; }
            .nav-links { display: none; }
            .cta-form { flex-direction: column; }
            .guarantee-badges { flex-direction: column; gap: 0.75rem; align-items: center; }
            .floating-bar { display: none; }
            .footer-grid { grid-template-columns: 1fr; }
        }