:root {
            --lbqr81-primary: #0056b3;
            --lbqr81-secondary: #00c6ff;
            --lbqr81-dark: #1a1c20;
            --lbqr81-light: #f8f9fa;
            --lbqr81-accent: #ff6b6b;
            --lbqr81-text: #333333;
            --lbqr81-gray: #6c757d;
            --lbqr81-pane-bg: #e9ecef;
            --lbqr81-spacing: 8px;
            --lbqr81-container-width: 1100px;
        }

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

        body {
            font-family: "Inter", "Segoe UI", "Microsoft YaHei", sans-serif;
            line-height: 1.7;
            color: var(--lbqr81-text);
            background-color: #ffffff;
            word-break: break-word;
            overflow-wrap: break-word;
        }

        /* 导航栏 */
        .lbqr81-header {
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            box-shadow: 0 2px 20px rgba(0,0,0,0.05);
            padding: calc(var(--lbqr81-spacing) * 2) 0;
        }

        .lbqr81-nav-container {
            max-width: var(--lbqr81-container-width);
            margin: 0 auto;
            padding: 0 calc(var(--lbqr81-spacing) * 3);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
        }

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

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

        .lbqr81-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: calc(var(--lbqr81-spacing) * 2);
            min-width: 0;
        }

        .lbqr81-nav-menu li {
            min-width: 0;
        }

        .lbqr81-nav-menu a {
            text-decoration: none;
            color: var(--lbqr81-dark);
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 12px;
            border-radius: 6px;
            transition: all 0.3s ease;
        }

        .lbqr81-nav-menu a:hover {
            color: var(--lbqr81-primary);
            background: rgba(0, 86, 179, 0.05);
        }

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

        /* Hero 区 - 独特对角线分割布局 */
        .lbqr81-hero {
            padding-top: 140px;
            padding-bottom: 80px;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            position: relative;
            overflow: hidden;
        }

        .lbqr81-hero::after {
            content: "";
            position: absolute;
            bottom: 0;
            right: 0;
            width: 50%;
            height: 100%;
            background: rgba(0, 86, 179, 0.03);
            transform: skewX(-15deg) translateX(100px);
            z-index: 1;
        }

        .lbqr81-hero-content {
            max-width: var(--lbqr81-container-width);
            margin: 0 auto;
            padding: 0 calc(var(--lbqr81-spacing) * 3);
            position: relative;
            z-index: 2;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
        }

        .lbqr81-hero-text {
            flex: 1 1 500px;
            min-width: 0;
        }

        .lbqr81-hero-badge {
            display: inline-block;
            background: var(--lbqr81-primary);
            color: #fff;
            padding: 4px 16px;
            border-radius: 50px;
            font-size: 0.8rem;
            margin-bottom: 24px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .lbqr81-hero h1 {
            font-size: clamp(2rem, 4vw + 1rem, 3.5rem);
            line-height: 1.2;
            margin-bottom: 24px;
            color: var(--lbqr81-dark);
            font-weight: 800;
        }

        .lbqr81-hero p {
            font-size: clamp(1rem, 1vw + 0.5rem, 1.25rem);
            color: var(--lbqr81-gray);
            max-width: 600px;
            margin-bottom: 40px;
        }

        /* 教程主体 - 仿双面板布局 */
        .lbqr81-tutorial-grid {
            max-width: var(--lbqr81-container-width);
            margin: -40px auto 80px;
            padding: 0 calc(var(--lbqr81-spacing) * 3);
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
            position: relative;
            z-index: 10;
        }

        .lbqr81-step-card {
            background: #fff;
            padding: 40px;
            border-radius: 16px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
            transition: transform 0.3s ease;
            border: 1px solid rgba(0,0,0,0.05);
            min-width: 0;
        }

        .lbqr81-step-card:hover {
            transform: translateY(-10px);
        }

        .lbqr81-step-num {
            font-size: 3rem;
            font-weight: 900;
            color: rgba(0, 86, 179, 0.1);
            line-height: 1;
            margin-bottom: 16px;
        }

        .lbqr81-step-card h3 {
            margin-bottom: 16px;
            color: var(--lbqr81-dark);
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .lbqr81-step-card ul {
            list-style: none;
            padding-left: 0;
        }

        .lbqr81-step-card li {
            margin-bottom: 12px;
            padding-left: 24px;
            position: relative;
            font-size: 0.95rem;
        }

        .lbqr81-step-card li::before {
            content: "→";
            position: absolute;
            left: 0;
            color: var(--lbqr81-primary);
        }

        /* 技术剖析区块 */
        .lbqr81-anatomy {
            background: var(--lbqr81-dark);
            padding: 96px 0;
            color: #fff;
        }

        .lbqr81-section-header {
            max-width: var(--lbqr81-container-width);
            margin: 0 auto 64px;
            text-align: center;
            padding: 0 calc(var(--lbqr81-spacing) * 3);
        }

        .lbqr81-section-header h2 {
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            margin-bottom: 16px;
        }

        .lbqr81-anatomy-grid {
            max-width: var(--lbqr81-container-width);
            margin: 0 auto;
            padding: 0 calc(var(--lbqr81-spacing) * 3);
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
        }

        .lbqr81-anatomy-item {
            flex: 1 1 45%;
            min-width: 0;
            background: rgba(255, 255, 255, 0.05);
            padding: 32px;
            border-radius: 12px;
            border-left: 4px solid var(--lbqr81-primary);
        }

        .lbqr81-anatomy-item h4 {
            color: var(--lbqr81-secondary);
            margin-bottom: 12px;
            font-size: 1.2rem;
        }

        .lbqr81-plugin-tag {
            display: inline-block;
            padding: 2px 8px;
            background: rgba(0, 198, 255, 0.2);
            color: var(--lbqr81-secondary);
            font-size: 0.75rem;
            border-radius: 4px;
            margin-right: 8px;
            margin-bottom: 8px;
        }

        /* 场景化工作流 */
        .lbqr81-workflow {
            padding: 96px 0;
            background: #fff;
        }

        .lbqr81-workflow-container {
            max-width: var(--lbqr81-container-width);
            margin: 0 auto;
            padding: 0 calc(var(--lbqr81-spacing) * 3);
        }

        .lbqr81-workflow-card {
            display: flex;
            flex-wrap: wrap;
            background: var(--lbqr81-light);
            border-radius: 20px;
            overflow: hidden;
            margin-bottom: 48px;
            box-shadow: 0 15px 40px rgba(0,0,0,0.04);
        }

        .lbqr81-workflow-info {
            flex: 1 1 50%;
            padding: 48px;
            min-width: 0;
        }

        .lbqr81-workflow-steps {
            flex: 1 1 50%;
            padding: 48px;
            background: var(--lbqr81-primary);
            color: #fff;
            min-width: 0;
        }

        .lbqr81-workflow-steps h5 {
            font-size: 1.4rem;
            margin-bottom: 24px;
            border-bottom: 1px solid rgba(255,255,255,0.2);
            padding-bottom: 12px;
        }

        .lbqr81-workflow-steps ol {
            padding-left: 20px;
        }

        .lbqr81-workflow-steps li {
            margin-bottom: 16px;
            font-weight: 300;
        }

        /* 发展历程 */
        .lbqr81-roadmap {
            padding: 80px 0;
            background: #f8f9fa;
        }

        .lbqr81-roadmap-flex {
            max-width: var(--lbqr81-container-width);
            margin: 0 auto;
            padding: 0 calc(var(--lbqr81-spacing) * 3);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 24px;
        }

        .lbqr81-roadmap-item {
            flex: 1 1 30%;
            min-width: 280px;
            text-align: center;
            padding: 24px;
            background: #fff;
            border-radius: 12px;
        }

        .lbqr81-era {
            font-weight: 800;
            color: var(--lbqr81-primary);
            display: block;
            margin-bottom: 8px;
        }

        /* 页脚 */
        .lbqr81-footer {
            background: var(--lbqr81-dark);
            color: rgba(255, 255, 255, 0.6);
            padding: 64px 0 32px;
        }

        .lbqr81-footer-content {
            max-width: var(--lbqr81-container-width);
            margin: 0 auto;
            padding: 0 calc(var(--lbqr81-spacing) * 3);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
        }

        .lbqr81-footer-brand {
            flex: 1 1 300px;
            margin-bottom: 40px;
            min-width: 0;
        }

        .lbqr81-footer-brand h2 {
            color: #fff;
            margin-bottom: 16px;
            font-size: 1.5rem;
        }

        .lbqr81-footer-links {
            flex: 1 1 200px;
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            min-width: 0;
        }

        .lbqr81-footer-group h4 {
            color: #fff;
            margin-bottom: 20px;
            font-size: 1rem;
        }

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

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

        .lbqr81-footer-group a {
            color: inherit;
            text-decoration: none;
            transition: color 0.3s;
        }

        .lbqr81-footer-group a:hover {
            color: var(--lbqr81-secondary);
        }

        .lbqr81-copyright {
            max-width: var(--lbqr81-container-width);
            margin: 48px auto 0;
            padding: 24px calc(var(--lbqr81-spacing) * 3) 0;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            text-align: center;
            font-size: 0.85rem;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .lbqr81-nav-menu {
                display: none; /* 简化移动端，实际开发可加汉堡菜单 */
            }
            .lbqr81-hero {
                padding-top: 100px;
                text-align: center;
            }
            .lbqr81-hero-text {
                flex: 1 1 100%;
            }
            .lbqr81-hero p {
                margin: 0 auto 32px;
            }
            .lbqr81-workflow-info, .lbqr81-workflow-steps {
                flex: 1 1 100%;
            }
            .lbqr81-anatomy-item {
                flex: 1 1 100%;
            }
        }