:root {
            --lbqr81-primary: #004a99;
            --lbqr81-accent: #ff6b00;
            --lbqr81-dark: #1a1a1a;
            --lbqr81-light: #f4f7f9;
            --lbqr81-text: #333333;
            --lbqr81-white: #ffffff;
            --lbqr81-gray: #666666;
            --lbqr81-border: #e0e6ed;
            --lbqr81-radius: 12px;
            --lbqr81-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --lbqr81-container-width: 1300px;
        }

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

        body {
            font-family: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
            line-height: 1.7;
            color: var(--lbqr81-text);
            background-color: var(--lbqr81-light);
            word-break: keep-all;
            overflow-x: hidden;
        }

        /* Navigation */
        .lbqr81-navbar {
            position: fixed;
            top: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            z-index: 1000;
            box-shadow: 0 2px 15px rgba(0,0,0,0.05);
            border-bottom: 1px solid var(--lbqr81-border);
        }

        .lbqr81-nav-container {
            max-width: var(--lbqr81-container-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding: 0 24px;
            height: 80px;
        }

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

        .lbqr81-logo img {
            height: 48px;
            width: auto;
            object-fit: contain;
        }

        .lbqr81-nav-links {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 20px;
            min-width: 0;
        }

        .lbqr81-nav-links a {
            text-decoration: none;
            color: var(--lbqr81-dark);
            font-weight: 500;
            font-size: 15px;
            transition: color 0.3s;
            padding: 8px 4px;
            border-bottom: 2px solid transparent;
        }

        .lbqr81-nav-links a:hover {
            color: var(--lbqr81-primary);
        }

        .lbqr81-nav-links a.active {
            color: var(--lbqr81-primary);
            border-bottom-color: var(--lbqr81-primary);
        }

        /* Hero Section - Unique Diagonal Split */
        .lbqr81-hero {
            padding-top: 140px;
            padding-bottom: 100px;
            background: linear-gradient(135deg, #004a99 0%, #002d5e 100%);
            color: var(--lbqr81-white);
            position: relative;
            overflow: hidden;
        }

        .lbqr81-hero-container {
            max-width: var(--lbqr81-container-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
        }

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

        .lbqr81-hero-title {
            font-size: clamp(2.5rem, 5vw, 4rem);
            line-height: 1.1;
            margin-bottom: 24px;
            font-weight: 800;
            word-break: break-word;
        }

        .lbqr81-hero-subtitle {
            font-size: clamp(1.1rem, 2vw, 1.4rem);
            opacity: 0.9;
            margin-bottom: 40px;
            max-width: 600px;
        }

        .lbqr81-hero-visual {
            flex: 1;
            min-width: 320px;
            display: flex;
            justify-content: center;
            position: relative;
        }

        .lbqr81-shortcut-card {
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(15px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: var(--lbqr81-radius);
            padding: 32px;
            box-shadow: 0 20px 50px rgba(0,0,0,0.3);
            transform: perspective(1000px) rotateY(-10deg);
            transition: transform 0.5s;
        }

        .lbqr81-shortcut-card:hover {
            transform: perspective(1000px) rotateY(0deg);
        }

        .lbqr81-key-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 12px;
        }

        .lbqr81-key {
            background: var(--lbqr81-white);
            color: var(--lbqr81-dark);
            padding: 12px;
            border-radius: 6px;
            text-align: center;
            font-weight: bold;
            font-size: 14px;
            box-shadow: 0 4px 0 #cbd5e0;
        }

        /* Technical Anatomy Section */
        .lbqr81-anatomy {
            padding: 96px 24px;
            max-width: var(--lbqr81-container-width);
            margin: 0 auto;
        }

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

        .lbqr81-section-tag {
            display: inline-block;
            background: var(--lbqr81-primary);
            color: var(--lbqr81-white);
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .lbqr81-section-title {
            font-size: clamp(2rem, 4vw, 2.5rem);
            color: var(--lbqr81-dark);
            margin-bottom: 24px;
        }

        .lbqr81-grid-3 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 32px;
        }

        .lbqr81-anatomy-card {
            background: var(--lbqr81-white);
            padding: 40px;
            border-radius: var(--lbqr81-radius);
            box-shadow: var(--lbqr81-shadow);
            border: 1px solid var(--lbqr81-border);
            transition: transform 0.3s, box-shadow 0.3s;
        }

        .lbqr81-anatomy-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.12);
        }

        .lbqr81-card-icon {
            width: 48px;
            height: 48px;
            background: var(--lbqr81-light);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 24px;
            font-size: 24px;
            color: var(--lbqr81-primary);
        }

        .lbqr81-card-title {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--lbqr81-dark);
        }

        .lbqr81-card-desc {
            color: var(--lbqr81-gray);
            font-size: 15px;
            line-height: 1.6;
        }

        /* Workflow Section - Feature List */
        .lbqr81-workflow {
            background: var(--lbqr81-dark);
            color: var(--lbqr81-white);
            padding: 96px 24px;
        }

        .lbqr81-workflow-container {
            max-width: var(--lbqr81-container-width);
            margin: 0 auto;
        }

        .lbqr81-workflow-item {
            display: flex;
            flex-wrap: wrap;
            margin-bottom: 80px;
            align-items: center;
        }

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

        .lbqr81-workflow-text {
            flex: 1;
            min-width: 300px;
            padding: 40px;
        }

        .lbqr81-workflow-visual {
            flex: 1;
            min-width: 300px;
            padding: 20px;
        }

        .lbqr81-workflow-tag {
            color: var(--lbqr81-accent);
            text-transform: uppercase;
            letter-spacing: 2px;
            font-weight: 700;
            font-size: 13px;
            margin-bottom: 16px;
            display: block;
        }

        .lbqr81-workflow-title {
            font-size: 32px;
            margin-bottom: 24px;
        }

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

        .lbqr81-workflow-list li {
            position: relative;
            padding-left: 32px;
            margin-bottom: 16px;
            font-size: 16px;
            opacity: 0.85;
        }

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

        /* Roadmap Section */
        .lbqr81-roadmap {
            padding: 96px 24px;
            max-width: 1000px;
            margin: 0 auto;
        }

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

        .lbqr81-roadmap-track::before {
            content: '';
            position: absolute;
            left: 50%;
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--lbqr81-border);
            transform: translateX(-50%);
        }

        .lbqr81-roadmap-item {
            margin-bottom: 64px;
            position: relative;
            width: 50%;
            padding: 0 40px;
        }

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

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

        .lbqr81-roadmap-dot {
            position: absolute;
            width: 20px;
            height: 20px;
            background: var(--lbqr81-primary);
            border-radius: 50%;
            top: 0;
            border: 4px solid var(--lbqr81-white);
            box-shadow: 0 0 0 4px var(--lbqr81-primary);
        }

        .lbqr81-roadmap-item:nth-child(odd) .lbqr81-roadmap-dot {
            right: -10px;
        }

        .lbqr81-roadmap-item:nth-child(even) .lbqr81-roadmap-dot {
            left: -10px;
        }

        .lbqr81-roadmap-era {
            font-weight: 800;
            font-size: 18px;
            color: var(--lbqr81-primary);
            margin-bottom: 8px;
        }

        .lbqr81-roadmap-focus {
            font-size: 16px;
            color: var(--lbqr81-gray);
        }

        /* Footer */
        .lbqr81-footer {
            background: #ffffff;
            padding: 80px 24px 40px;
            border-top: 1px solid var(--lbqr81-border);
        }

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

        .lbqr81-footer-brand {
            flex: 1;
            min-width: 250px;
            margin-bottom: 40px;
        }

        .lbqr81-brand-name {
            font-size: 24px;
            font-weight: 800;
            color: var(--lbqr81-primary);
            margin-bottom: 16px;
        }

        .lbqr81-footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 60px;
            flex: 2;
            min-width: 300px;
        }

        .lbqr81-footer-col h4 {
            font-size: 16px;
            margin-bottom: 24px;
            color: var(--lbqr81-dark);
        }

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

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

        .lbqr81-footer-col a {
            text-decoration: none;
            color: var(--lbqr81-gray);
            font-size: 14px;
            transition: color 0.3s;
        }

        .lbqr81-footer-col a:hover {
            color: var(--lbqr81-primary);
        }

        .lbqr81-copyright {
            max-width: var(--lbqr81-container-width);
            margin: 40px auto 0;
            padding-top: 40px;
            border-top: 1px solid var(--lbqr81-border);
            text-align: center;
            font-size: 14px;
            color: var(--lbqr81-gray);
        }

        /* Responsive */
        @media (max-width: 768px) {
            .lbqr81-nav-container {
                height: auto;
                padding: 16px;
            }
            .lbqr81-nav-links {
                width: 100%;
                justify-content: center;
                gap: 10px;
                margin-top: 16px;
            }
            .lbqr81-hero-content {
                padding-right: 0;
                text-align: center;
                margin-bottom: 40px;
            }
            .lbqr81-hero-visual {
                width: 100%;
            }
            .lbqr81-roadmap-track::before {
                left: 20px;
            }
            .lbqr81-roadmap-item {
                width: 100%;
                padding-left: 60px;
                padding-right: 0;
                text-align: left !important;
            }
            .lbqr81-roadmap-item:nth-child(even) {
                left: 0;
            }
            .lbqr81-roadmap-dot {
                left: 10px !important;
            }
            .lbqr81-grid-3 {
                grid-template-columns: 1fr;
            }
        }