:root {
            --aisitex-bg: #0B0F19;
            --aisitex-surface: #131A2B;
            --aisitex-surface-hover: #1A243B;
            --aisitex-border: #222F47;
            --aisitex-border-active: #00D2FF;
            --aisitex-primary: #F5A623;
            --aisitex-primary-glow: rgba(245, 166, 35, 0.25);
            --aisitex-cyan: #00D2FF;
            --aisitex-cyan-glow: rgba(0, 210, 255, 0.2);
            --aisitex-text-main: #E2E8F0;
            --aisitex-text-muted: #94A3B8;
            --aisitex-text-dim: #64748B;
            --aisitex-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            --aisitex-font-mono: "SF Mono", "Cascadia Code", "Roboto Mono", Consolas, monospace;
            --aisitex-container: 1280px;
        }

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

        body {
            background-color: var(--aisitex-bg);
            color: var(--aisitex-text-main);
            font-family: var(--aisitex-font);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
            background-image: 
                radial-gradient(circle at 50% 0%, rgba(0, 210, 255, 0.08) 0%, transparent 60%),
                linear-gradient(to right, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
                linear-gradient(to bottom, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
            background-size: 100% 100%, 40px 40px, 40px 40px;
        }

        /* 顶部导航 */
        .aisitex-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(11, 15, 25, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--aisitex-border);
            transition: all 0.3s ease;
        }

        .aisitex-header.is-scrolled {
            background: rgba(11, 15, 25, 0.95);
            border-bottom-color: rgba(0, 210, 255, 0.3);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
        }

        .aisitex-header-inner {
            max-width: var(--aisitex-container);
            margin: 0 auto;
            padding: 0 24px;
            height: 72px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .aisitex-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            text-decoration: none;
            color: var(--aisitex-text-main);
        }

        .aisitex-brand-logo {
            height: 36px;
            width: auto;
            object-fit: contain;
        }

        .aisitex-brand-text {
            font-size: 20px;
            font-weight: 700;
            letter-spacing: 1px;
            background: linear-gradient(135deg, #FFFFFF 0%, #E2E8F0 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .aisitex-brand-badge {
            font-size: 11px;
            font-family: var(--aisitex-font-mono);
            padding: 2px 8px;
            border-radius: 4px;
            background: rgba(0, 210, 255, 0.12);
            color: var(--aisitex-cyan);
            border: 1px solid rgba(0, 210, 255, 0.3);
            text-transform: uppercase;
        }

        .aisitex-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .aisitex-nav-link {
            padding: 8px 16px;
            color: var(--aisitex-text-muted);
            text-decoration: none;
            font-size: 15px;
            font-weight: 500;
            border-radius: 6px;
            transition: all 0.2s ease;
        }

        .aisitex-nav-link:hover {
            color: var(--aisitex-text-main);
            background: rgba(255, 255, 255, 0.05);
        }

        .aisitex-nav-link.active {
            color: #000;
            background: var(--aisitex-primary);
            font-weight: 600;
            box-shadow: 0 0 12px var(--aisitex-primary-glow);
        }

        .aisitex-nav-link.active:hover {
            color: #000;
            background: #FFB73B;
        }

        .aisitex-menu-toggle {
            display: none;
            background: none;
            border: 1px solid var(--aisitex-border);
            color: var(--aisitex-text-main);
            padding: 8px;
            border-radius: 6px;
            cursor: pointer;
        }

        /* 统一 Layout */
        .aisitex-main {
            padding-top: 72px;
            min-height: 100vh;
        }

        .aisitex-container-inner {
            max-width: var(--aisitex-container);
            margin: 0 auto;
            padding: 40px 24px;
        }

        /* Hero 节点与首屏总览 */
        .aisitex-hero-atlas {
            padding: 40px 0 30px;
            border-bottom: 1px solid var(--aisitex-border);
            position: relative;
        }

        .aisitex-hero-grid {
            display: grid;
            grid-template-columns: 1fr 380px;
            gap: 32px;
            align-items: center;
        }

        .aisitex-hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-family: var(--aisitex-font-mono);
            font-size: 13px;
            color: var(--aisitex-cyan);
            background: rgba(0, 210, 255, 0.1);
            border: 1px solid rgba(0, 210, 255, 0.25);
            padding: 6px 14px;
            border-radius: 20px;
            margin-bottom: 16px;
        }

        .aisitex-hero-tag-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--aisitex-cyan);
            box-shadow: 0 0 8px var(--aisitex-cyan);
            animation: aisitex-pulse 2s infinite;
        }

        @keyframes aisitex-pulse {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.4; transform: scale(0.8); }
        }

        .aisitex-hero-title {
            font-size: 38px;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
            color: #FFFFFF;
        }

        .aisitex-hero-title span {
            color: var(--aisitex-primary);
        }

        .aisitex-hero-desc {
            font-size: 16px;
            color: var(--aisitex-text-muted);
            max-width: 680px;
            margin-bottom: 28px;
            line-height: 1.7;
        }

        /* 顶部横向信息带 */
        .aisitex-nav-strip {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .aisitex-strip-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            background: var(--aisitex-surface);
            border: 1px solid var(--aisitex-border);
            border-radius: 6px;
            color: var(--aisitex-text-main);
            text-decoration: none;
            font-size: 14px;
            font-weight: 500;
            transition: all 0.2s ease;
        }

        .aisitex-strip-btn:hover {
            border-color: var(--aisitex-cyan);
            background: var(--aisitex-surface-hover);
            color: var(--aisitex-cyan);
        }

        .aisitex-strip-btn.primary {
            background: var(--aisitex-primary);
            border-color: var(--aisitex-primary);
            color: #000;
            font-weight: 700;
        }

        .aisitex-strip-btn.primary:hover {
            background: #FFB73B;
            box-shadow: 0 0 16px var(--aisitex-primary-glow);
        }

        /* 首屏右侧控制台快照卡片 */
        .aisitex-snapshot-card {
            background: var(--aisitex-surface);
            border: 1px solid var(--aisitex-border);
            border-radius: 12px;
            padding: 20px;
            position: relative;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
        }

        .aisitex-snapshot-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid var(--aisitex-border);
            padding-bottom: 12px;
            margin-bottom: 16px;
        }

        .aisitex-snapshot-title {
            font-size: 13px;
            font-family: var(--aisitex-font-mono);
            color: var(--aisitex-text-muted);
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .aisitex-status-indicator {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-family: var(--aisitex-font-mono);
            color: #10B981;
        }

        .aisitex-status-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: #10B981;
            box-shadow: 0 0 6px #10B981;
        }

        .aisitex-snapshot-metrics {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
            margin-bottom: 16px;
        }

        .aisitex-metric-box {
            background: rgba(11, 15, 25, 0.6);
            border: 1px solid rgba(255, 255, 255, 0.05);
            padding: 10px 14px;
            border-radius: 6px;
        }

        .aisitex-metric-label {
            font-size: 12px;
            color: var(--aisitex-text-dim);
            margin-bottom: 4px;
        }

        .aisitex-metric-val {
            font-size: 18px;
            font-family: var(--aisitex-font-mono);
            font-weight: 700;
            color: var(--aisitex-cyan);
        }

        .aisitex-app-preview-mini {
            display: flex;
            gap: 12px;
            align-items: center;
            background: rgba(0, 210, 255, 0.03);
            border: 1px dashed rgba(0, 210, 255, 0.2);
            padding: 10px;
            border-radius: 8px;
        }

        .aisitex-app-thumb {
            width: 50px;
            height: auto;
            border-radius: 4px;
        }

        .aisitex-app-info {
            font-size: 12px;
        }

        .aisitex-app-info-title {
            color: var(--aisitex-text-main);
            font-weight: 600;
        }

        .aisitex-app-info-sub {
            color: var(--aisitex-text-dim);
            font-size: 11px;
        }

        /* 图谱章节通用规范 */
        .aisitex-section {
            padding: 56px 0;
            border-bottom: 1px solid var(--aisitex-border);
        }

        .aisitex-section-header {
            margin-bottom: 36px;
        }

        .aisitex-section-sub {
            font-family: var(--aisitex-font-mono);
            font-size: 12px;
            color: var(--aisitex-cyan);
            text-transform: uppercase;
            letter-spacing: 1.5px;
            margin-bottom: 8px;
            display: block;
        }

        .aisitex-section-title {
            font-size: 26px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 10px;
        }

        .aisitex-section-desc {
            font-size: 15px;
            color: var(--aisitex-text-muted);
            max-width: 800px;
        }

        /* 架构映射层级排版 (module_architecture) */
        .aisitex-arch-container {
            display: flex;
            flex-direction: column;
            gap: 16px;
            position: relative;
        }

        .aisitex-arch-layer {
            background: var(--aisitex-surface);
            border: 1px solid var(--aisitex-border);
            border-radius: 10px;
            padding: 24px;
            display: grid;
            grid-template-columns: 220px 1fr;
            gap: 24px;
            align-items: center;
            transition: all 0.25s ease;
            position: relative;
        }

        .aisitex-arch-layer:hover {
            border-color: var(--aisitex-cyan);
            box-shadow: 0 0 20px var(--aisitex-cyan-glow);
            transform: translateX(4px);
        }

        .aisitex-arch-layer-info {
            border-right: 1px solid var(--aisitex-border);
            padding-right: 20px;
        }

        .aisitex-layer-badge {
            display: inline-block;
            font-family: var(--aisitex-font-mono);
            font-size: 11px;
            color: var(--aisitex-primary);
            background: rgba(245, 166, 35, 0.1);
            padding: 2px 8px;
            border-radius: 4px;
            margin-bottom: 8px;
        }

        .aisitex-layer-name {
            font-size: 18px;
            font-weight: 700;
            color: #FFFFFF;
        }

        .aisitex-components-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }

        .aisitex-component-node {
            background: rgba(11, 15, 25, 0.7);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 8px;
            padding: 14px 16px;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .aisitex-node-icon {
            width: 32px;
            height: 32px;
            border-radius: 6px;
            background: rgba(0, 210, 255, 0.1);
            border: 1px solid rgba(0, 210, 255, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--aisitex-cyan);
            flex-shrink: 0;
        }

        .aisitex-node-text {
            font-size: 14px;
            font-weight: 600;
            color: var(--aisitex-text-main);
        }

        /* 全地形场景支撑 (capability_matrix) */
        .aisitex-matrix-grid {
            display: grid;
            grid-template-columns: 460px 1fr;
            gap: 32px;
            align-items: start;
        }

        .aisitex-visual-card {
            background: var(--aisitex-surface);
            border: 1px solid var(--aisitex-border);
            border-radius: 12px;
            overflow: hidden;
            position: relative;
        }

        .aisitex-visual-img {
            width: 100%;
            height: 480px;
            object-fit: cover;
            display: block;
        }

        .aisitex-visual-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 20px;
            background: linear-gradient(to top, rgba(11, 15, 25, 0.95), transparent);
        }

        .aisitex-visual-caption {
            font-size: 14px;
            color: var(--aisitex-text-main);
            font-weight: 600;
        }

        .aisitex-table-wrap {
            background: var(--aisitex-surface);
            border: 1px solid var(--aisitex-border);
            border-radius: 12px;
            overflow: hidden;
        }

        .aisitex-matrix-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
        }

        .aisitex-matrix-table th {
            background: rgba(11, 15, 25, 0.9);
            padding: 16px 20px;
            font-size: 13px;
            font-weight: 600;
            color: var(--aisitex-text-muted);
            border-bottom: 1px solid var(--aisitex-border);
            font-family: var(--aisitex-font-mono);
        }

        .aisitex-matrix-table td {
            padding: 18px 20px;
            border-bottom: 1px solid var(--aisitex-border);
            font-size: 14px;
            color: var(--aisitex-text-main);
        }

        .aisitex-matrix-table tr:last-child td {
            border-bottom: none;
        }

        .aisitex-matrix-table tr:hover td {
            background: var(--aisitex-surface-hover);
        }

        .aisitex-scenario-tag {
            font-weight: 700;
            color: #FFFFFF;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .aisitex-status-pill {
            display: inline-block;
            font-size: 12px;
            font-family: var(--aisitex-font-mono);
            padding: 4px 10px;
            border-radius: 4px;
            background: rgba(0, 210, 255, 0.1);
            color: var(--aisitex-cyan);
            border: 1px solid rgba(0, 210, 255, 0.3);
        }

        /* 纯电驾趣与数字续航 (interaction_nodes) */
        .aisitex-nodes-grid {
            display: grid;
            grid-template-columns: 1fr 420px;
            gap: 32px;
            align-items: center;
        }

        .aisitex-nodes-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .aisitex-node-card {
            background: var(--aisitex-surface);
            border: 1px solid var(--aisitex-border);
            border-radius: 10px;
            padding: 20px 24px;
            transition: all 0.2s ease;
        }

        .aisitex-node-card:hover {
            border-color: var(--aisitex-primary);
            transform: translateY(-2px);
        }

        .aisitex-node-head {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 8px;
        }

        .aisitex-node-num {
            font-family: var(--aisitex-font-mono);
            font-size: 14px;
            font-weight: 700;
            color: var(--aisitex-primary);
            background: rgba(245, 166, 35, 0.1);
            width: 28px;
            height: 28px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .aisitex-node-name {
            font-size: 17px;
            font-weight: 700;
            color: #FFFFFF;
        }

        .aisitex-node-text {
            font-size: 14px;
            color: var(--aisitex-text-muted);
            line-height: 1.6;
            padding-left: 40px;
        }

        .aisitex-side-visual {
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid var(--aisitex-border);
            position: relative;
        }

        .aisitex-side-img {
            width: 100%;
            height: auto;
            display: block;
            object-fit: cover;
        }

        /* 平台入口与行动路径 (CTA) */
        .aisitex-cta-block {
            background: linear-gradient(135deg, rgba(19, 26, 43, 0.9) 0%, rgba(11, 15, 25, 0.95) 100%);
            border: 1px solid var(--aisitex-border-active);
            border-radius: 16px;
            padding: 48px;
            text-align: center;
            position: relative;
            box-shadow: 0 0 30px rgba(0, 210, 255, 0.15);
            margin: 40px 0;
        }

        .aisitex-cta-title {
            font-size: 28px;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 12px;
        }

        .aisitex-cta-desc {
            font-size: 16px;
            color: var(--aisitex-text-muted);
            max-width: 600px;
            margin: 0 auto 32px;
        }

        .aisitex-cta-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* 页脚 */
        .aisitex-footer {
            background: #070A12;
            border-top: 1px solid var(--aisitex-border);
            padding: 40px 0 24px;
            color: var(--aisitex-text-dim);
            font-size: 13px;
        }

        .aisitex-footer-inner {
            max-width: var(--aisitex-container);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }

        .aisitex-footer-links {
            display: flex;
            gap: 20px;
        }

        .aisitex-footer-link {
            color: var(--aisitex-text-muted);
            text-decoration: none;
            transition: color 0.2s ease;
        }

        .aisitex-footer-link:hover {
            color: var(--aisitex-cyan);
        }

        /* 响应式支持 */
        @media (max-width: 1024px) {
            .aisitex-hero-grid {
                grid-template-columns: 1fr;
            }
            .aisitex-matrix-grid {
                grid-template-columns: 1fr;
            }
            .aisitex-visual-img {
                height: 320px;
            }
            .aisitex-nodes-grid {
                grid-template-columns: 1fr;
            }
            .aisitex-arch-layer {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .aisitex-arch-layer-info {
                border-right: none;
                border-bottom: 1px solid var(--aisitex-border);
                padding-right: 0;
                padding-bottom: 12px;
            }
        }

        @media (max-width: 768px) {
            .aisitex-menu-toggle {
                display: block;
            }
            .aisitex-nav {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background: #0B0F19;
                border-bottom: 1px solid var(--aisitex-border);
                flex-direction: column;
                padding: 16px 24px;
                gap: 12px;
            }
            .aisitex-nav[aria-hidden="false"] {
                display: flex;
            }
            .aisitex-components-grid {
                grid-template-columns: 1fr;
            }
            .aisitex-hero-title {
                font-size: 28px;
            }
            .aisitex-cta-block {
                padding: 28px 20px;
            }
        }