:root {
            --primary: #6366f1;
            --secondary: #ec4899;
            --accent: #14b8a6;
            --warning: #f59e0b;
            --dark: #0f172a;
            --light-bg: #f8fafc;
            --card-bg: #ffffff;
            --text-main: #334155;
            --text-muted: #64748b;
            --border: #e2e8f0;
            --gradient: linear-gradient(135deg, #6366f1 0%, #ec4899 50%, #14b8a6 100%);
            --gradient-soft: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(236, 72, 153, 0.05) 50%, rgba(20, 184, 166, 0.05) 100%);
        }

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

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--text-main);
            background-color: var(--light-bg);
        }

        body {
            line-height: 1.6;
            overflow-x: hidden;
            position: relative;
        }

        /* Ambient Background blobs to match 斑斓彩调风 */
        .ambient-bg {
            position: absolute;
            width: 100%;
            height: 100%;
            top: 0;
            left: 0;
            z-index: -1;
            pointer-events: none;
            overflow: hidden;
        }
        .blob {
            position: absolute;
            border-radius: 50%;
            filter: blur(120px);
            opacity: 0.12;
        }
        .blob-1 { top: 5%; left: 10%; width: 400px; height: 400px; background-color: var(--primary); }
        .blob-2 { top: 25%; right: 5%; width: 500px; height: 500px; background-color: var(--secondary); }
        .blob-3 { top: 60%; left: -10%; width: 600px; height: 600px; background-color: var(--accent); }
        .blob-4 { top: 85%; right: 10%; width: 450px; height: 450px; background-color: var(--primary); }

        /* Container */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Typography */
        h1, h2, h3, h4 {
            color: var(--dark);
            font-weight: 700;
            line-height: 1.3;
        }
        .section-title {
            text-align: center;
            font-size: 2.25rem;
            margin-bottom: 12px;
            background: linear-gradient(135deg, var(--dark) 0%, var(--primary) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .section-desc {
            text-align: center;
            color: var(--text-muted);
            max-width: 700px;
            margin: 0 auto 48px;
            font-size: 1.1rem;
        }

        /* Header */
        header {
            position: sticky;
            top: 0;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            z-index: 1000;
            transition: all 0.3s ease;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .logo-area {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .ai-page-logo {
            height: 40px;
            width: auto;
        }
        .brand-name {
            font-size: 1.4rem;
            font-weight: 800;
            background: var(--gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .nav-menu {
            display: flex;
            gap: 20px;
            list-style: none;
        }
        .nav-link {
            text-decoration: none;
            color: var(--text-main);
            font-weight: 500;
            font-size: 0.95rem;
            transition: color 0.2s;
        }
        .nav-link:hover {
            color: var(--primary);
        }
        .nav-btn {
            background: var(--gradient);
            color: #fff;
            padding: 8px 20px;
            border-radius: 99px;
            text-decoration: none;
            font-weight: 600;
            font-size: 0.9rem;
            transition: opacity 0.2s, transform 0.2s;
            box-shadow: 0 4px 12px rgba(99, 102, 241, 0.2);
        }
        .nav-btn:hover {
            opacity: 0.9;
            transform: translateY(-1px);
        }
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
        }
        .menu-toggle span {
            width: 25px;
            height: 3px;
            background-color: var(--dark);
            border-radius: 3px;
            transition: 0.3s;
        }

        /* Hero (No image as requested) */
        .hero {
            padding: 100px 0 80px;
            text-align: center;
            position: relative;
        }
        .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            background: var(--gradient-soft);
            border: 1px solid rgba(99, 102, 241, 0.2);
            color: var(--primary);
            border-radius: 99px;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 24px;
            box-shadow: 0 4px 12px rgba(99, 102, 241, 0.05);
        }
        .hero h1 {
            font-size: 3.5rem;
            margin-bottom: 24px;
            background: var(--gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            letter-spacing: -0.02em;
        }
        .hero-desc {
            font-size: 1.25rem;
            color: var(--text-muted);
            max-width: 800px;
            margin: 0 auto 40px;
        }
        .hero-ctas {
            display: flex;
            justify-content: center;
            gap: 16px;
            margin-bottom: 48px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 28px;
            font-size: 1.05rem;
            font-weight: 600;
            border-radius: 12px;
            text-decoration: none;
            transition: all 0.2s;
        }
        .btn-primary {
            background: var(--gradient);
            color: white;
            box-shadow: 0 6px 20px rgba(236, 72, 153, 0.25);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(236, 72, 153, 0.35);
        }
        .btn-secondary {
            background: var(--card-bg);
            color: var(--dark);
            border: 1px solid var(--border);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
        }
        .btn-secondary:hover {
            transform: translateY(-2px);
            border-color: var(--primary);
            color: var(--primary);
        }
        
        /* Stats Component */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 40px;
        }
        .stat-card {
            background: var(--card-bg);
            padding: 30px 24px;
            border-radius: 16px;
            border: 1px solid var(--border);
            box-shadow: 0 4px 20px rgba(0,0,0,0.02);
            transition: transform 0.3s;
        }
        .stat-card:hover {
            transform: translateY(-5px);
        }
        .stat-num {
            font-size: 2.5rem;
            font-weight: 800;
            background: var(--gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 8px;
        }
        .stat-label {
            font-size: 0.95rem;
            color: var(--text-muted);
        }

        /* Sections */
        section {
            padding: 90px 0;
            border-bottom: 1px solid rgba(226, 232, 240, 0.6);
        }

        /* About Us & Platform Intro */
        .about-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 48px;
            align-items: center;
        }
        .about-content h3 {
            font-size: 1.75rem;
            margin-bottom: 20px;
        }
        .about-text {
            color: var(--text-main);
            font-size: 1.05rem;
            margin-bottom: 24px;
        }
        .about-features {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .about-feat-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
        }
        .about-feat-icon {
            color: var(--accent);
            font-size: 1.25rem;
        }
        .about-feat-text h4 {
            font-size: 1rem;
            margin-bottom: 4px;
        }
        .about-feat-text p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .about-promo-wrap {
            position: relative;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
            border: 4px solid var(--card-bg);
        }
        .about-promo-wrap img {
            display: block;
            width: 100%;
        }

        /* AIGC Services Grid */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .service-card {
            background: var(--card-bg);
            border-radius: 20px;
            padding: 36px 30px;
            border: 1px solid var(--border);
            box-shadow: 0 4px 20px rgba(0,0,0,0.02);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: var(--gradient);
            opacity: 0;
            transition: opacity 0.3s;
        }
        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 30px rgba(99, 102, 241, 0.08);
        }
        .service-card:hover::before {
            opacity: 1;
        }
        .service-icon {
            font-size: 2.2rem;
            margin-bottom: 24px;
        }
        .service-card h3 {
            font-size: 1.35rem;
            margin-bottom: 12px;
        }
        .service-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        /* AIGC Production Scenarios */
        .production-scenarios {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .scenario-card {
            background: var(--card-bg);
            border-radius: 16px;
            padding: 24px;
            border: 1px solid var(--border);
            text-align: center;
            transition: all 0.2s;
        }
        .scenario-card:hover {
            border-color: var(--primary);
            box-shadow: 0 4px 15px rgba(99,102,241,0.05);
        }
        .scenario-tag {
            display: inline-block;
            padding: 4px 10px;
            background: var(--gradient-soft);
            color: var(--primary);
            border-radius: 6px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .scenario-card h4 {
            font-size: 1.1rem;
            margin-bottom: 8px;
        }
        .scenario-card p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* Solutions */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .solution-card {
            background: var(--gradient-soft);
            border: 1px solid rgba(99, 102, 241, 0.1);
            border-radius: 20px;
            padding: 32px;
            position: relative;
        }
        .solution-tag {
            position: absolute;
            top: -12px;
            left: 32px;
            background: var(--gradient);
            color: white;
            font-size: 0.8rem;
            padding: 4px 12px;
            border-radius: 6px;
            font-weight: 600;
        }
        .solution-card h3 {
            font-size: 1.25rem;
            margin: 12px 0 16px;
        }
        .solution-list {
            list-style: none;
            margin-bottom: 24px;
        }
        .solution-list li {
            font-size: 0.9rem;
            margin-bottom: 8px;
            color: var(--text-main);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .solution-list li::before {
            content: '✓';
            color: var(--accent);
            font-weight: bold;
        }

        /* Service Network & Material Img */
        .network-wrap {
            display: grid;
            grid-template-columns: 1.12fr 0.88fr;
            gap: 48px;
            align-items: center;
        }
        .network-regions {
            display:grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }
        .region-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            padding: 16px;
            border-radius: 12px;
            text-align: center;
        }
        .region-card h4 {
            font-size: 1rem;
            color: var(--primary);
            margin-bottom: 4px;
        }
        .region-card p {
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .material-showcase {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .material-showcase img {
            border-radius: 16px;
            width: 100%;
            object-fit: cover;
            box-shadow: 0 4px 15px rgba(0,0,0,0.05);
        }

        /* Process Steps */
        .steps-container {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }
        .step-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 30px 24px;
            position: relative;
            transition: all 0.3s;
        }
        .step-item:hover {
            border-color: var(--primary);
        }
        .step-num {
            position: absolute;
            top: -20px;
            right: 24px;
            font-size: 3rem;
            font-weight: 800;
            color: rgba(99, 102, 241, 0.1);
        }
        .step-item h3 {
            font-size: 1.15rem;
            margin-top: 10px;
            margin-bottom: 12px;
        }
        .step-item p {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* Tech Standards */
        .tech-standards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .tech-std-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 24px;
            display: flex;
            gap: 16px;
        }
        .tech-std-icon {
            font-size: 1.75rem;
            color: var(--secondary);
        }
        .tech-std-info h4 {
            font-size: 1.05rem;
            margin-bottom: 6px;
        }
        .tech-std-info p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* Supported Platforms (Tag Cloud) */
        .platforms-cloud {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            max-width: 1000px;
            margin: 0 auto;
        }
        .platform-tag {
            background: var(--card-bg);
            border: 1px solid var(--border);
            padding: 8px 18px;
            border-radius: 99px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-main);
            transition: all 0.2s;
        }
        .platform-tag:hover {
            background: var(--gradient-soft);
            border-color: var(--primary);
            color: var(--primary);
            transform: scale(1.05);
        }

        /* Comparison Board */
        .compare-section {
            background: var(--gradient-soft);
        }
        .compare-flex {
            display: grid;
            grid-template-columns: 0.7fr 1.3fr;
            gap: 40px;
            align-items: center;
        }
        .rating-box {
            background: var(--card-bg);
            border-radius: 20px;
            padding: 40px 30px;
            text-align: center;
            border: 1px solid var(--border);
            box-shadow: 0 8px 30px rgba(0,0,0,0.03);
        }
        .rating-score {
            font-size: 4.5rem;
            font-weight: 800;
            background: var(--gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1;
            margin-bottom: 12px;
        }
        .rating-stars {
            color: var(--warning);
            font-size: 1.5rem;
            margin-bottom: 16px;
        }
        .compare-table-wrapper {
            background: var(--card-bg);
            border-radius: 20px;
            border: 1px solid var(--border);
            overflow-x: auto;
            box-shadow: 0 8px 30px rgba(0,0,0,0.03);
        }
        .compare-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 500px;
        }
        .compare-table th, .compare-table td {
            padding: 16px 24px;
            border-bottom: 1px solid var(--border);
        }
        .compare-table th {
            background-color: var(--light-bg);
            font-weight: 700;
            color: var(--dark);
        }
        .compare-table tr:last-child td {
            border-bottom: none;
        }
        .highlight-row {
            background-color: rgba(99, 102, 241, 0.02);
            font-weight: 600;
        }
        .status-check {
            color: var(--accent);
            font-weight: bold;
        }
        .status-cross {
            color: var(--text-muted);
        }

        /* Token Price Comparison Table */
        .price-table-wrapper {
            background: var(--card-bg);
            border-radius: 20px;
            border: 1px solid var(--border);
            overflow-x: auto;
            margin-top: 30px;
        }
        .price-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 600px;
        }
        .price-table th, .price-table td {
            padding: 16px 24px;
            border-bottom: 1px solid var(--border);
        }
        .price-table th {
            background-color: var(--light-bg);
            color: var(--dark);
        }
        .price-tag-low {
            color: var(--accent);
            font-weight: 700;
        }

        /* Vocational/AI Training */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
        }
        .train-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 24px;
            text-align: center;
            transition: all 0.2s;
        }
        .train-card:hover {
            border-color: var(--secondary);
            transform: translateY(-4px);
        }
        .train-icon {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 16px;
        }
        .train-card h4 {
            font-size: 1rem;
            margin-bottom: 8px;
        }
        .train-card p {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* Case Studies & Articles */
        .case-articles-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }
        .case-show {
            background: var(--card-bg);
            border-radius: 20px;
            border: 1px solid var(--border);
            padding: 32px;
        }
        .case-box {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .case-item {
            border-left: 3px solid var(--primary);
            padding-left: 16px;
        }
        .case-item h4 {
            font-size: 1.05rem;
            margin-bottom: 6px;
        }
        .case-item p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .articles-box {
            background: var(--card-bg);
            border-radius: 20px;
            border: 1px solid var(--border);
            padding: 32px;
        }
        .article-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .article-list li {
            border-bottom: 1px dashed var(--border);
            padding-bottom: 12px;
        }
        .article-list li:last-child {
            border-bottom: none;
        }
        .article-link {
            text-decoration: none;
            color: var(--text-main);
            font-weight: 500;
            display: block;
            transition: color 0.2s;
        }
        .article-link:hover {
            color: var(--primary);
        }
        .article-meta {
            font-size: 0.75rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* User Reviews */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .review-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 28px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .review-stars {
            color: var(--warning);
            margin-bottom: 12px;
        }
        .review-text {
            font-size: 0.95rem;
            color: var(--text-main);
            margin-bottom: 20px;
            font-style: italic;
        }
        .review-user {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .user-avatar-placeholder {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--gradient-soft);
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            color: var(--primary);
            font-size: 0.85rem;
        }
        .user-info h5 {
            font-size: 0.95rem;
            color: var(--dark);
        }
        .user-info p {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        /* Help Center / FAQ / Glossary / Troubleshooting */
        .help-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
        }
        .faq-accordion {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 12px;
            overflow: hidden;
        }
        .faq-question {
            width: 100%;
            text-align: left;
            background: none;
            border: none;
            padding: 18px 24px;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: background-color 0.2s;
        }
        .faq-question:hover {
            background-color: var(--light-bg);
        }
        .faq-question::after {
            content: '+';
            font-size: 1.5rem;
            color: var(--text-muted);
            transition: transform 0.2s;
        }
        .faq-item.active .faq-question::after {
            content: '−';
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background-color: var(--light-bg);
        }
        .faq-answer-inner {
            padding: 20px 24px;
            font-size: 0.95rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border);
        }
        
        .side-help-box {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
        .troubleshoot-box, .glossary-box {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 24px;
        }
        .troubleshoot-box h3, .glossary-box h3 {
            font-size: 1.2rem;
            margin-bottom: 16px;
            border-bottom: 2px solid var(--border);
            padding-bottom: 8px;
        }
        .ts-list, .glossary-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .ts-list li h4, .glossary-list li h4 {
            font-size: 0.95rem;
            margin-bottom: 2px;
        }
        .ts-list li p, .glossary-list li p {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* Agency / Franchise Callout */
        .agency-box {
            background: var(--gradient);
            color: white;
            border-radius: 24px;
            padding: 60px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(99, 102, 241, 0.2);
        }
        .agency-box h2 {
            color: white;
            font-size: 2.25rem;
            margin-bottom: 16px;
        }
        .agency-box p {
            font-size: 1.1rem;
            max-width: 700px;
            margin: 0 auto 32px;
            opacity: 0.9;
        }

        /* Contact & Smart Match Form */
        .contact-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 48px;
        }
        .form-box {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: 40px;
            box-shadow: 0 8px 30px rgba(0,0,0,0.02);
        }
        .form-box h3 {
            font-size: 1.5rem;
            margin-bottom: 24px;
        }
        .form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-bottom: 20px;
        }
        .form-group-full {
            grid-column: span 2;
        }
        .form-group label {
            display: block;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--dark);
        }
        .form-input, .form-select, .form-textarea {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border);
            border-radius: 8px;
            font-size: 0.95rem;
            background-color: var(--light-bg);
            color: var(--dark);
            transition: border-color 0.2s;
        }
        .form-input:focus, .form-select:focus, .form-textarea:focus {
            outline: none;
            border-color: var(--primary);
            background-color: #fff;
        }
        .contact-info-panel {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: 40px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .contact-info-panel h3 {
            font-size: 1.5rem;
            margin-bottom: 24px;
        }
        .contact-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 20px;
            margin-bottom: 30px;
        }
        .contact-list li {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 1rem;
        }
        .contact-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--gradient-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-weight: bold;
        }
        .qr-codes {
            display: flex;
            gap: 24px;
            align-items: center;
        }
        .qr-item {
            text-align: center;
        }
        .qr-item img {
            width: 120px;
            height: 120px;
            border-radius: 8px;
            border: 1px solid var(--border);
            padding: 4px;
            background-color: #fff;
        }
        .qr-item p {
            font-size: 0.8rem;
            margin-top: 8px;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* Footer */
        footer {
            background-color: var(--dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 30px;
            border-top: 1px solid rgba(255,255,255,0.1);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo img {
            height: 40px;
            margin-bottom: 16px;
        }
        .footer-about p {
            font-size: 0.9rem;
            line-height: 1.6;
        }
        .footer-links h4, .footer-friend h4 {
            color: white;
            font-size: 1.1rem;
            margin-bottom: 16px;
        }
        .footer-links-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px;
        }
        .footer-links-grid a {
            color: rgba(255,255,255,0.7);
            text-decoration: none;
            font-size: 0.9rem;
            transition: color 0.2s;
        }
        .footer-links-grid a:hover {
            color: white;
        }
        .friend-links-area {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .friend-links-area a {
            color: rgba(255,255,255,0.7);
            text-decoration: none;
            font-size: 0.85rem;
            background: rgba(255,255,255,0.05);
            padding: 4px 10px;
            border-radius: 4px;
            transition: all 0.2s;
        }
        .friend-links-area a:hover {
            color: white;
            background: rgba(255,255,255,0.15);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.8rem;
        }
        .ai-page-home-link {
            color: white;
            text-decoration: underline;
        }

        /* Floating customer service */
        .floating-service {
            position: fixed;
            right: 24px;
            bottom: 24px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            z-index: 999;
        }
        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--gradient);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 15px rgba(0,0,0,0.15);
            cursor: pointer;
            text-decoration: none;
            font-size: 1.25rem;
            position: relative;
        }
        .float-btn-qr {
            position: absolute;
            bottom: 60px;
            right: 0;
            background: white;
            padding: 12px;
            border-radius: 12px;
            box-shadow: 0 8px 30px rgba(0,0,0,0.15);
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s;
            text-align: center;
        }
        .float-btn-qr img {
            width: 120px;
            height: 120px;
        }
        .float-btn-qr p {
            color: var(--dark);
            font-size: 0.75rem;
            margin-top: 6px;
            white-space: nowrap;
        }
        .float-btn:hover .float-btn-qr {
            opacity: 1;
            visibility: visible;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .services-grid { grid-template-columns: repeat(2, 1fr); }
            .production-scenarios { grid-template-columns: repeat(2, 1fr); }
            .solutions-grid { grid-template-columns: 1fr; }
            .network-wrap { grid-template-columns: 1fr; }
            .steps-container { grid-template-columns: repeat(2, 1fr); }
            .tech-standards-grid { grid-template-columns: repeat(2, 1fr); }
            .compare-flex { grid-template-columns: 1fr; }
            .training-grid { grid-template-columns: repeat(3, 1fr); }
            .case-articles-grid { grid-template-columns: 1fr; }
            .reviews-grid { grid-template-columns: repeat(2, 1fr); }
            .help-grid { grid-template-columns: 1fr; }
            .contact-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 72px;
                left: 0;
                width: 100%;
                background: white;
                border-bottom: 1px solid var(--border);
                padding: 20px;
                gap: 15px;
                box-shadow: 0 4px 10px rgba(0,0,0,0.05);
            }
            .nav-menu.active {
                display: flex;
            }
            .menu-toggle {
                display: flex;
            }
            .hero h1 { font-size: 2.25rem; }
            .hero-desc { font-size: 1.05rem; }
            .stats-grid { grid-template-columns: 1fr; }
            .services-grid { grid-template-columns: 1fr; }
            .about-grid { grid-template-columns: 1fr; }
            .about-features { grid-template-columns: 1fr; }
            .training-grid { grid-template-columns: repeat(2, 1fr); }
            .reviews-grid { grid-template-columns: 1fr; }
            .form-grid { grid-template-columns: 1fr; }
            .form-group-full { grid-column: span 1; }
        }