:root {
            --lbqr81-primary: #0055aa;
            --lbqr81-primary-dark: #003366;
            --lbqr81-accent: #00ff9d;
            --lbqr81-text: #2c3e50;
            --lbqr81-text-light: #666666;
            --lbqr81-bg: #f8fafc;
            --lbqr81-white: #ffffff;
            --lbqr81-grid-line: rgba(0, 85, 170, 0.05);
            --lbqr81-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            --lbqr81-radius: 16px;
        }

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

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--lbqr81-text);
            background-color: var(--lbqr81-bg);
            line-height: 1.7;
            word-break: break-word;
            overflow-wrap: break-word;
        }

        /* 布局容器 */
        .lbqr81-container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 导航栏 */
        .lbqr81-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
        }

        .lbqr81-header.lbqr81-scrolled {
            box-shadow: var(--lbqr81-shadow);
        }

        .lbqr81-nav-inner {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            height: 72px;
        }

        .lbqr81-logo {
            display: flex;
            align-items: center;
            min-width: 0;
        }

        .lbqr81-logo img {
            height: 40px;
            width: auto;
            object-fit: contain;
        }

        .lbqr81-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 8px;
        }

        .lbqr81-nav-item a {
            text-decoration: none;
            color: var(--lbqr81-text);
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 8px;
            font-size: 0.95rem;
            transition: all 0.2s ease;
            word-break: keep-all;
        }

        .lbqr81-nav-item a:hover {
            background: rgba(0, 85, 170, 0.05);
            color: var(--lbqr81-primary);
        }

        .lbqr81-nav-item.lbqr81-active a {
            background: var(--lbqr81-primary);
            color: var(--lbqr81-white);
        }

        /* Hero 区域 */
        .lbqr81-hero {
            padding-top: 160px;
            padding-bottom: 96px;
            background: linear-gradient(135deg, #f0f4f8 0%, #d9e2ec 100%);
            position: relative;
            overflow: hidden;
            text-align: center;
        }

        .lbqr81-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: radial-gradient(var(--lbqr81-grid-line) 1px, transparent 1px);
            background-size: 30px 30px;
        }

        .lbqr81-hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
            margin: 0 auto;
        }

        .lbqr81-hero h1 {
            font-size: clamp(2.2rem, 5vw + 1rem, 3.8rem);
            line-height: 1.2;
            margin-bottom: 24px;
            color: var(--lbqr81-primary-dark);
            font-weight: 800;
        }

        .lbqr81-hero p {
            font-size: clamp(1.1rem, 1.5vw + 0.5rem, 1.3rem);
            color: var(--lbqr81-text-light);
            margin-bottom: 40px;
        }

        /* 核心架构区块 - 蓝图风格布局 */
        .lbqr81-section {
            padding: 96px 0;
            position: relative;
        }

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

        .lbqr81-section-title h2 {
            font-size: clamp(1.8rem, 3vw + 0.5rem, 2.5rem);
            color: var(--lbqr81-primary-dark);
            margin-bottom: 16px;
        }

        .lbqr81-blueprint-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
        }

        .lbqr81-blueprint-card {
            background: var(--lbqr81-white);
            border: 1px solid rgba(0, 0, 0, 0.05);
            border-radius: var(--lbqr81-radius);
            padding: 40px;
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            box-shadow: var(--lbqr81-shadow);
            position: relative;
            overflow: hidden;
        }

        .lbqr81-blueprint-card:hover {
            transform: translateY(-8px);
            border-color: var(--lbqr81-primary);
        }

        .lbqr81-card-icon {
            width: 56px;
            height: 56px;
            background: var(--lbqr81-primary);
            border-radius: 12px;
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--lbqr81-white);
            font-weight: bold;
            font-size: 1.2rem;
        }

        .lbqr81-blueprint-card h3 {
            font-size: 1.5rem;
            margin-bottom: 16px;
            color: var(--lbqr81-primary);
        }

        /* 插件体系可视化布局 */
        .lbqr81-plugin-tetrad {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            margin-top: 48px;
        }

        .lbqr81-plugin-box {
            flex: 1;
            min-width: 240px;
            background: #ffffff;
            padding: 24px;
            border-left: 4px solid var(--lbqr81-primary);
            border-radius: 4px 12px 12px 4px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.03);
        }

        .lbqr81-plugin-box h4 {
            color: var(--lbqr81-primary-dark);
            margin-bottom: 8px;
            font-size: 1.1rem;
        }

        /* 工作流场景 - 步骤条设计 */
        .lbqr81-workflow-section {
            background: var(--lbqr81-primary-dark);
            color: var(--lbqr81-white);
            border-radius: 40px;
            margin: 64px 24px;
            padding: 80px 48px;
        }

        .lbqr81-workflow-item {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            margin-bottom: 64px;
            align-items: center;
        }

        .lbqr81-workflow-item:nth-child(even) {
            flex-direction: row-reverse;
        }

        .lbqr81-workflow-content {
            flex: 1;
            min-width: 300px;
        }

        .lbqr81-workflow-content h3 {
            font-size: 1.8rem;
            margin-bottom: 24px;
            color: var(--lbqr81-accent);
        }

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

        .lbqr81-step-list li {
            position: relative;
            padding-left: 32px;
            margin-bottom: 16px;
            font-size: 1.05rem;
        }

        .lbqr81-step-list li::before {
            content: '→';
            position: absolute;
            left: 0;
            color: var(--lbqr81-accent);
            font-weight: bold;
        }

        .lbqr81-visual-pane {
            flex: 1;
            min-width: 300px;
            background: rgba(255,255,255,0.05);
            height: 300px;
            border-radius: 20px;
            border: 2px dashed rgba(255,255,255,0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: monospace;
            padding: 20px;
        }

        /* 演进路线图 */
        .lbqr81-roadmap {
            padding: 96px 0;
            background: var(--lbqr81-white);
        }

        .lbqr81-timeline {
            position: relative;
            padding: 40px 0;
        }

        .lbqr81-timeline::before {
            content: '';
            position: absolute;
            left: 50%;
            width: 2px;
            height: 100%;
            background: #eee;
            transform: translateX(-50%);
        }

        .lbqr81-timeline-item {
            width: 50%;
            padding: 20px 40px;
            position: relative;
        }

        .lbqr81-timeline-item:nth-child(odd) {
            left: 0;
            text-align: right;
        }

        .lbqr81-timeline-item:nth-child(even) {
            left: 50%;
            text-align: left;
        }

        .lbqr81-timeline-dot {
            position: absolute;
            top: 30px;
            width: 16px;
            height: 16px;
            background: var(--lbqr81-primary);
            border-radius: 50%;
            z-index: 2;
        }

        .lbqr81-timeline-item:nth-child(odd) .lbqr81-timeline-dot {
            right: -8px;
        }

        .lbqr81-timeline-item:nth-child(even) .lbqr81-timeline-dot {
            left: -8px;
        }

        /* 页脚 */
        .lbqr81-footer {
            background: #1a202c;
            color: #a0aec0;
            padding: 80px 0 40px;
        }

        .lbqr81-footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            margin-bottom: 64px;
        }

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

        .lbqr81-footer-links h4 {
            color: var(--lbqr81-white);
            margin-bottom: 24px;
        }

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

        .lbqr81-footer-links li {
            margin-bottom: 12px;
        }

        .lbqr81-footer-links a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s;
        }

        .lbqr81-footer-links a:hover {
            color: var(--lbqr81-accent);
        }

        .lbqr81-footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 32px;
            text-align: center;
            font-size: 0.9rem;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .lbqr81-nav-inner {
                height: auto;
                padding: 16px 0;
            }
            .lbqr81-nav-menu {
                justify-content: center;
                margin-top: 16px;
            }
            .lbqr81-timeline::before {
                left: 20px;
            }
            .lbqr81-timeline-item {
                width: 100%;
                left: 0 !important;
                text-align: left !important;
                padding-left: 50px;
            }
            .lbqr81-timeline-dot {
                left: 12px !important;
            }
            .lbqr81-workflow-item {
                flex-direction: column !important;
            }
        }

        /* 按钮样式 */
        .lbqr81-btn {
            display: inline-block;
            padding: 16px 32px;
            border-radius: 50px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s;
            cursor: pointer;
        }

        .lbqr81-btn-primary {
            background: var(--lbqr81-primary);
            color: var(--lbqr81-white);
            box-shadow: 0 4px 15px rgba(0, 85, 170, 0.3);
        }

        .lbqr81-btn-primary:hover {
            transform: scale(1.05);
            box-shadow: 0 6px 20px rgba(0, 85, 170, 0.4);
        }