:root {
            --lbqr81-primary: #004a99;
            --lbqr81-accent: #00c2ff;
            --lbqr81-dark: #1a1c20;
            --lbqr81-light: #f8f9fa;
            --lbqr81-text: #333333;
            --lbqr81-gray: #666666;
            --lbqr81-border: #e1e4e8;
            --lbqr81-container-width: 1320px;
        }

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

        body {
            font-family: "Inter", "Segoe UI", "Microsoft YaHei", sans-serif;
            color: var(--lbqr81-text);
            background-color: #ffffff;
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* Layout Helpers */
        .lbqr81-container {
            max-width: var(--lbqr81-container-width);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        .lbqr81-flex {
            display: flex;
            flex-wrap: wrap;
        }

        .lbqr81-grid {
            display: grid;
            gap: 32px;
        }

        /* Typography */
        h1, h2, h3 {
            word-break: keep-all;
            overflow-wrap: break-word;
            line-height: 1.3;
            color: var(--lbqr81-dark);
        }

        p {
            word-break: keep-all;
            overflow-wrap: break-word;
            line-height: 1.8;
            margin-bottom: 16px;
        }

        /* Navigation */
        .lbqr81-nav-wrapper {
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--lbqr81-border);
            transition: all 0.3s ease;
        }

        .lbqr81-nav-container {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 16px 24px;
            max-width: var(--lbqr81-container-width);
            margin: 0 auto;
        }

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

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

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

        .lbqr81-menu li a {
            text-decoration: none;
            color: var(--lbqr81-dark);
            padding: 8px 16px;
            font-weight: 500;
            font-size: 14px;
            border-radius: 6px;
            transition: all 0.2s ease;
        }

        .lbqr81-menu li a:hover {
            color: var(--lbqr81-primary);
            background: rgba(0, 74, 153, 0.05);
        }

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

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

        .lbqr81-hero-content {
            flex: 1;
            min-width: 320px;
            padding-right: 48px;
            z-index: 2;
        }

        .lbqr81-hero-title {
            font-size: clamp(2.5rem, 5vw, 4rem);
            font-weight: 800;
            margin-bottom: 24px;
            background: linear-gradient(to right, var(--lbqr81-primary), var(--lbqr81-accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .lbqr81-hero-subtitle {
            font-size: clamp(1.1rem, 2vw, 1.4rem);
            color: var(--lbqr81-gray);
            margin-bottom: 40px;
            max-width: 600px;
        }

        .lbqr81-hero-image {
            flex: 1;
            min-width: 320px;
            position: relative;
        }

        .lbqr81-hero-image img {
            width: 100%;
            height: auto;
            border-radius: 24px;
            box-shadow: 0 40px 80px rgba(0, 0, 0, 0.15);
            transform: perspective(1000px) rotateY(-5deg);
        }

        /* Technical Anatomy Section */
        .lbqr81-anatomy {
            padding: 96px 0;
            background: var(--lbqr81-dark);
            color: #fff;
        }

        .lbqr81-section-tag {
            color: var(--lbqr81-accent);
            text-transform: uppercase;
            letter-spacing: 2px;
            font-weight: 700;
            margin-bottom: 16px;
            display: block;
        }

        .lbqr81-anatomy h2 {
            color: #fff;
            font-size: clamp(2rem, 4vw, 3rem);
            margin-bottom: 48px;
        }

        .lbqr81-anatomy-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 24px;
        }

        .lbqr81-anatomy-card {
            background: rgba(255, 255, 255, 0.05);
            padding: 40px;
            border-radius: 16px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            transition: transform 0.3s ease;
        }

        .lbqr81-anatomy-card:hover {
            transform: translateY(-8px);
            background: rgba(255, 255, 255, 0.08);
        }

        .lbqr81-card-title {
            font-size: 24px;
            margin-bottom: 16px;
            color: var(--lbqr81-accent);
        }

        .lbqr81-card-detail {
            color: #bdc3c7;
            font-size: 15px;
        }

        /* Plugin Tetrad Section */
        .lbqr81-plugins {
            padding: 96px 0;
            background: #fff;
        }

        .lbqr81-plugin-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
            margin-bottom: 80px;
        }

        .lbqr81-plugin-image {
            flex: 1;
            min-width: 320px;
        }

        .lbqr81-plugin-image img {
            width: 100%;
            border-radius: 16px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.08);
        }

        .lbqr81-plugin-content {
            flex: 1;
            min-width: 320px;
        }

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

        .lbqr81-plugin-item {
            padding: 24px;
            margin-bottom: 16px;
            background: var(--lbqr81-light);
            border-left: 4px solid var(--lbqr81-primary);
            border-radius: 0 8px 8px 0;
        }

        .lbqr81-plugin-type {
            font-weight: 800;
            color: var(--lbqr81-primary);
            display: block;
            margin-bottom: 4px;
        }

        /* Workflow Section */
        .lbqr81-workflow {
            padding: 96px 0;
            background: #fdfdfd;
        }

        .lbqr81-workflow-header {
            text-align: center;
            max-width: 800px;
            margin: 0 auto 64px;
        }

        .lbqr81-workflow-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
            gap: 40px;
        }

        .lbqr81-workflow-box {
            background: #fff;
            border: 1px solid var(--lbqr81-border);
            border-radius: 20px;
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }

        .lbqr81-workflow-box-title {
            padding: 24px;
            background: var(--lbqr81-primary);
            color: #fff;
            font-size: 20px;
        }

        .lbqr81-workflow-steps {
            padding: 32px;
            list-style: none;
        }

        .lbqr81-workflow-steps li {
            padding-left: 28px;
            position: relative;
            margin-bottom: 16px;
        }

        .lbqr81-workflow-steps li::before {
            content: "→";
            position: absolute;
            left: 0;
            color: var(--lbqr81-accent);
            font-weight: 900;
        }

        /* Evolutionary Roadmap */
        .lbqr81-roadmap {
            padding: 96px 0;
            background: linear-gradient(180deg, #ffffff 0%, #f0f4f8 100%);
        }

        .lbqr81-timeline {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            margin-top: 48px;
        }

        .lbqr81-timeline-item {
            flex: 1;
            min-width: 280px;
            background: #fff;
            padding: 32px;
            border-radius: 16px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
            position: relative;
        }

        .lbqr81-era {
            font-size: 14px;
            font-weight: 700;
            color: var(--lbqr81-primary);
            margin-bottom: 8px;
        }

        /* CTA Section */
        .lbqr81-cta {
            padding: 80px 0;
            text-align: center;
            background: var(--lbqr81-primary);
            color: #fff;
        }

        .lbqr81-btn {
            display: inline-block;
            padding: 18px 48px;
            background: #fff;
            color: var(--lbqr81-primary);
            text-decoration: none;
            font-weight: 700;
            border-radius: 50px;
            font-size: 18px;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            margin-top: 32px;
        }

        .lbqr81-btn:hover {
            transform: scale(1.05);
            box-shadow: 0 10px 25px rgba(0,0,0,0.2);
        }

        /* Footer */
        .lbqr81-footer {
            padding: 64px 0 32px;
            background: var(--lbqr81-dark);
            color: #999;
            border-top: 1px solid rgba(255,255,255,0.1);
        }

        .lbqr81-footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
        }

        .lbqr81-brand-text {
            color: #fff;
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .lbqr81-copyright {
            font-size: 14px;
            width: 100%;
            text-align: center;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid rgba(255,255,255,0.05);
        }

        /* Responsive Breakpoints */
        @media (max-width: 1024px) {
            .lbqr81-hero-content { padding-right: 0; text-align: center; }
            .lbqr81-hero-image { margin-top: 48px; }
            .lbqr81-hero-subtitle { margin-left: auto; margin-right: auto; }
        }

        @media (max-width: 768px) {
            .lbqr81-menu { display: none; } /* Simplified for demo, would normally have a burger menu */
            .lbqr81-anatomy-grid, .lbqr81-workflow-grid, .lbqr81-timeline {
                grid-template-columns: 1fr;
            }
            .lbqr81-plugin-row { gap: 32px; }
        }