:root {
            --lbqr81-primary: #0056b3;
            --lbqr81-secondary: #00c6ff;
            --lbqr81-accent: #ff8c00;
            --lbqr81-bg-dark: #0a0e14;
            --lbqr81-bg-card: #161b22;
            --lbqr81-text-main: #e6edf3;
            --lbqr81-text-dim: #8b949e;
            --lbqr81-border: #30363d;
            --lbqr81-font-fluid: clamp(1rem, 1.2vw + 0.5rem, 1.25rem);
            --lbqr81-h1-fluid: clamp(2.5rem, 5vw + 1rem, 4.5rem);
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
            background-color: var(--lbqr81-bg-dark);
            color: var(--lbqr81-text-main);
            line-height: 1.6;
            overflow-x: hidden;
            word-break: break-word;
        }

        /* 导航栏设计 */
        .lbqr81-navbar {
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(10, 14, 20, 0.85);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--lbqr81-border);
            padding: 0 5%;
        }

        .lbqr81-nav-container {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            height: 80px;
        }

        .lbqr81-logo {
            flex: 0 0 auto;
            min-width: 0;
        }

        .lbqr81-logo img {
            height: 40px;
            display: block;
        }

        .lbqr81-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 24px;
        }

        .lbqr81-nav-link {
            text-decoration: none;
            color: var(--lbqr81-text-dim);
            font-weight: 500;
            font-size: 0.95rem;
            transition: color 0.3s ease;
            position: relative;
            padding: 8px 0;
        }

        .lbqr81-nav-link:hover, .lbqr81-nav-link.active {
            color: var(--lbqr81-secondary);
        }

        .lbqr81-nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--lbqr81-secondary);
        }

        /* Hero 区：对角线分割设计 */
        .lbqr81-hero {
            position: relative;
            min-height: 85vh;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            padding-top: 80px;
            overflow: hidden;
            background: linear-gradient(135deg, #0a0e14 50%, #0d1117 50%);
        }

        .lbqr81-hero-content {
            width: 100%;
            max-width: 1400px;
            margin: 0 auto;
            padding: 48px 5%;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
        }

        .lbqr81-hero-text {
            flex: 1;
            min-width: 320px;
            padding-right: 48px;
        }

        .lbqr81-hero-h1 {
            font-size: var(--lbqr81-h1-fluid);
            line-height: 1.1;
            margin-bottom: 24px;
            background: linear-gradient(to right, #fff, var(--lbqr81-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            font-weight: 800;
        }

        .lbqr81-hero-p {
            font-size: clamp(1.1rem, 1vw + 0.5rem, 1.5rem);
            color: var(--lbqr81-text-dim);
            margin-bottom: 40px;
            max-width: 700px;
        }

        .lbqr81-btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }

        .lbqr81-btn {
            padding: 16px 32px;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 600;
            transition: transform 0.2s ease, box-shadow 0.2s ease;
            text-align: center;
        }

        .lbqr81-btn-primary {
            background: var(--lbqr81-primary);
            color: white;
            box-shadow: 0 4px 15px rgba(0, 86, 179, 0.4);
        }

        .lbqr81-btn-outline {
            border: 1px solid var(--lbqr81-border);
            color: var(--lbqr81-text-main);
        }

        .lbqr81-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(0, 198, 255, 0.3);
        }

        /* 核心对比区 - Grid布局 */
        .lbqr81-comparison-section {
            padding: 96px 5%;
            max-width: 1400px;
            margin: 0 auto;
        }

        .lbqr81-section-title {
            text-align: center;
            margin-bottom: 64px;
        }

        .lbqr81-section-title h2 {
            font-size: clamp(2rem, 3vw, 3rem);
            margin-bottom: 16px;
        }

        .lbqr81-grid-comparison {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 32px;
            margin-bottom: 64px;
        }

        .lbqr81-card {
            background: var(--lbqr81-bg-card);
            border: 1px solid var(--lbqr81-border);
            border-radius: 16px;
            padding: 40px;
            transition: border-color 0.3s ease;
        }

        .lbqr81-card:hover {
            border-color: var(--lbqr81-secondary);
        }

        .lbqr81-card h3 {
            font-size: 1.75rem;
            margin-bottom: 24px;
            color: var(--lbqr81-secondary);
            border-bottom: 2px solid var(--lbqr81-border);
            padding-bottom: 12px;
        }

        .lbqr81-feature-list {
            list-style: none;
        }

        .lbqr81-feature-item {
            margin-bottom: 16px;
            padding-left: 28px;
            position: relative;
        }

        .lbqr81-feature-item::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--lbqr81-accent);
            font-weight: bold;
        }

        /* 技术解剖区 */
        .lbqr81-tech-anatomy {
            background: #0d1117;
            padding: 96px 5%;
        }

        .lbqr81-anatomy-container {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
        }

        .lbqr81-tech-box {
            flex: 1;
            min-width: 300px;
        }

        .lbqr81-subsystem-card {
            background: rgba(255, 255, 255, 0.03);
            border-left: 4px solid var(--lbqr81-primary);
            padding: 24px;
            margin-bottom: 24px;
        }

        .lbqr81-subsystem-card h4 {
            color: var(--lbqr81-secondary);
            margin-bottom: 12px;
        }

        /* 工作流展示区 */
        .lbqr81-workflow-section {
            padding: 96px 5%;
            max-width: 1400px;
            margin: 0 auto;
        }

        .lbqr81-workflow-flex {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
        }

        .lbqr81-workflow-card {
            flex: 1;
            min-width: 400px;
            background: var(--lbqr81-bg-card);
            padding: 32px;
            border-radius: 12px;
        }

        .lbqr81-workflow-card h3 {
            margin-bottom: 20px;
            color: var(--lbqr81-accent);
        }

        .lbqr81-step {
            display: flex;
            gap: 16px;
            margin-bottom: 12px;
            padding: 12px;
            background: rgba(0, 0, 0, 0.2);
            border-radius: 6px;
        }

        .lbqr81-step-num {
            color: var(--lbqr81-secondary);
            font-weight: bold;
        }

        /* 进化路线图 */
        .lbqr81-roadmap-section {
            padding: 96px 5%;
            background: var(--lbqr81-bg-dark);
        }

        .lbqr81-roadmap-timeline {
            max-width: 900px;
            margin: 0 auto;
            position: relative;
            padding: 40px 0;
        }

        .lbqr81-roadmap-item {
            padding: 24px;
            border-left: 2px solid var(--lbqr81-border);
            margin-left: 20px;
            position: relative;
        }

        .lbqr81-roadmap-item::after {
            content: '';
            position: absolute;
            left: -9px;
            top: 30px;
            width: 16px;
            height: 16px;
            background: var(--lbqr81-secondary);
            border-radius: 50%;
        }

        .lbqr81-roadmap-era {
            font-weight: bold;
            color: var(--lbqr81-secondary);
            font-size: 1.2rem;
            display: block;
            margin-bottom: 8px;
        }

        /* 页脚 */
        .lbqr81-footer {
            padding: 64px 5% 32px;
            background: #05070a;
            border-top: 1px solid var(--lbqr81-border);
        }

        .lbqr81-footer-content {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 40px;
        }

        .lbqr81-footer-brand {
            flex: 1;
            min-width: 250px;
        }

        .lbqr81-footer-brand h2 {
            font-size: 1.5rem;
            margin-bottom: 16px;
            color: var(--lbqr81-text-main);
        }

        .lbqr81-footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
        }

        .lbqr81-footer-col h4 {
            margin-bottom: 20px;
            color: var(--lbqr81-secondary);
        }

        .lbqr81-footer-col ul {
            list-style: none;
        }

        .lbqr81-footer-col li {
            margin-bottom: 10px;
        }

        .lbqr81-footer-col a {
            color: var(--lbqr81-text-dim);
            text-decoration: none;
            transition: color 0.3s;
        }

        .lbqr81-footer-col a:hover {
            color: white;
        }

        .lbqr81-copyright {
            width: 100%;
            text-align: center;
            padding-top: 48px;
            color: var(--lbqr81-text-dim);
            font-size: 0.9rem;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .lbqr81-nav-menu {
                display: none; /* 简化移动端，实际项目中可加汉堡菜单 */
            }
            .lbqr81-hero {
                background: var(--lbqr81-bg-dark);
                text-align: center;
            }
            .lbqr81-hero-text {
                padding-right: 0;
            }
            .lbqr81-btn-group {
                justify-content: center;
            }
            .lbqr81-workflow-card {
                min-width: 100%;
            }
        }