:root {
            --primary: #0052ff;
            --primary-dark: #003db3;
            --secondary: #ff007f;
            --accent: #00f0ff;
            --dark: #0f172a;
            --light-bg: #f8fafc;
            --card-bg: #ffffff;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --border-color: #e2e8f0;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --container-w: 1200px;
        }

        * {
            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;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

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

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            font-weight: 600;
            border-radius: 8px;
            border: 2px solid transparent;
            cursor: pointer;
            transition: var(--transition);
            font-size: 1rem;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #ffffff;
            box-shadow: 0 4px 15px rgba(0, 82, 255, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 82, 255, 0.4);
        }

        .btn-outline {
            border-color: var(--primary);
            color: var(--primary);
            background: transparent;
        }

        .btn-outline:hover {
            background-color: rgba(0, 82, 255, 0.05);
            transform: translateY(-2px);
        }

        .btn-accent {
            background: var(--accent);
            color: var(--dark);
            font-weight: bold;
        }

        .btn-accent:hover {
            background: #00d8e6;
            transform: translateY(-2px);
        }

        /* Typography */
        h1, h2, h3, h4 {
            color: var(--dark);
            font-weight: 800;
        }

        section {
            padding: 80px 0;
            border-bottom: 1px solid var(--border-color);
        }

        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 50px auto;
        }

        .section-header p {
            color: var(--text-muted);
            font-size: 1.1rem;
            margin-top: 10px;
        }

        .tag-badge {
            display: inline-block;
            padding: 4px 12px;
            background-color: rgba(0, 82, 255, 0.1);
            color: var(--primary);
            font-weight: 700;
            border-radius: 20px;
            font-size: 0.85rem;
            margin-bottom: 12px;
            text-transform: uppercase;
        }

        /* Header & Nav */
        header {
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.02);
        }

        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
        }

        .logo-wrap {
            display: flex;
            align-items: center;
        }

        .ai-page-logo {
            height: 40px;
            width: auto;
        }

        .nav-menu {
            display: flex;
            gap: 20px;
            list-style: none;
        }

        .nav-link {
            font-weight: 500;
            color: var(--text-main);
            font-size: 0.95rem;
            padding: 8px 4px;
        }

        .nav-link:hover {
            color: var(--primary);
        }

        .nav-cta {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 6px;
            cursor: pointer;
            border: none;
            background: transparent;
        }

        .menu-toggle span {
            width: 25px;
            height: 3px;
            background-color: var(--dark);
            border-radius: 3px;
            transition: var(--transition);
        }

        /* Hero Section (Strictly No Images) */
        .hero-section {
            padding-top: 150px;
            padding-bottom: 100px;
            background: linear-gradient(135deg, #ffffff 0%, #f0f4ff 100%);
            position: relative;
            overflow: hidden;
            text-align: center;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -20%;
            left: -10%;
            width: 50%;
            height: 80%;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.1) 0%, transparent 70%);
            z-index: 1;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            bottom: -20%;
            right: -10%;
            width: 50%;
            height: 80%;
            background: radial-gradient(circle, rgba(255, 0, 127, 0.08) 0%, transparent 70%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 900px;
            margin: 0 auto;
        }

        .hero-title {
            font-size: 2.8rem;
            line-height: 1.2;
            margin-bottom: 24px;
            color: var(--dark);
        }

        .hero-title span {
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            font-size: 1.25rem;
            color: var(--text-muted);
            margin-bottom: 40px;
            max-width: 750px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero-actions {
            display: flex;
            gap: 20px;
            justify-content: center;
            flex-wrap: wrap;
            margin-bottom: 50px;
        }

        /* Stats Cards */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 24px;
            margin-top: 40px;
        }

        .stat-card {
            background-color: var(--card-bg);
            padding: 30px 20px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
            transition: var(--transition);
        }

        .stat-card:hover {
            transform: translateY(-5px);
            border-color: var(--primary);
        }

        .stat-num {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1;
            margin-bottom: 8px;
        }

        .stat-label {
            font-size: 0.95rem;
            color: var(--text-muted);
            font-weight: 600;
        }

        /* About Section */
        .about-section {
            background-color: #ffffff;
        }

        .about-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .about-text h3 {
            font-size: 2rem;
            margin-bottom: 20px;
        }

        .about-text p {
            color: var(--text-muted);
            margin-bottom: 24px;
            font-size: 1.05rem;
        }

        .about-bullets {
            list-style: none;
        }

        .about-bullets li {
            position: relative;
            padding-left: 28px;
            margin-bottom: 12px;
            font-weight: 600;
        }

        .about-bullets li::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--secondary);
            font-weight: 900;
            font-size: 1.2rem;
        }

        .about-highlight-box {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.05), rgba(255, 0, 127, 0.05));
            border-left: 5px solid var(--primary);
            padding: 30px;
            border-radius: 0 12px 12px 0;
        }

        /* Service Capabilities (AIGC models) */
        .model-showcase {
            background-color: var(--light-bg);
        }

        .model-list-wrapper {
            margin-top: 30px;
        }

        .model-tags-container {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
        }

        .model-tag {
            background-color: var(--card-bg);
            border: 1px solid var(--border-color);
            padding: 10px 20px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--dark);
            transition: var(--transition);
            box-shadow: 0 2px 5px rgba(0,0,0,0.02);
        }

        .model-tag:hover {
            background-color: var(--primary);
            color: #ffffff;
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        /* One-stop creation tools */
        .creation-section {
            background-color: #ffffff;
        }

        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }

        .creation-card {
            background-color: var(--light-bg);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .creation-card::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }

        .creation-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
            background-color: #ffffff;
        }

        .creation-card:hover::after {
            opacity: 1;
        }

        .card-icon {
            font-size: 2.5rem;
            margin-bottom: 20px;
            display: inline-block;
        }

        .creation-card h3 {
            font-size: 1.3rem;
            margin-bottom: 12px;
        }

        .creation-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        /* Solutions */
        .solutions-section {
            background-color: var(--light-bg);
        }

        /* Network & Standards */
        .network-section {
            background-color: #ffffff;
        }

        .network-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .map-placeholder {
            background: linear-gradient(135deg, #e2e8f0 0%, #cbd5e1 100%);
            border-radius: 16px;
            padding: 40px;
            text-align: center;
            border: 2px dashed var(--primary);
        }

        .map-title {
            font-weight: 800;
            color: var(--dark);
            font-size: 1.5rem;
            margin-bottom: 10px;
        }

        .map-cities {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-top: 20px;
        }

        .city-tag {
            background: var(--dark);
            color: #fff;
            padding: 6px 14px;
            border-radius: 4px;
            font-size: 0.85rem;
            font-weight: bold;
        }

        /* Process Steps */
        .process-section {
            background-color: var(--light-bg);
        }

        .process-flow {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 20px;
            margin-top: 40px;
        }

        .process-step {
            background-color: var(--card-bg);
            padding: 24px;
            border-radius: 8px;
            border: 1px solid var(--border-color);
            position: relative;
            text-align: center;
        }

        .step-num {
            position: absolute;
            top: -15px;
            left: 50%;
            transform: translateX(-50%);
            width: 30px;
            height: 30px;
            background: var(--secondary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 0.9rem;
        }

        .process-step h4 {
            margin-top: 15px;
            margin-bottom: 10px;
        }

        .process-step p {
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        /* Cases Center */
        .cases-section {
            background-color: #ffffff;
        }

        .gallery-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }

        .gallery-item {
            background-color: var(--light-bg);
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .gallery-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.05);
        }

        .gallery-img-container {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 9;
            background-color: #e2e8f0;
        }

        .gallery-img-container.square {
            aspect-ratio: 1 / 1;
        }

        .gallery-img-container img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .gallery-body {
            padding: 20px;
        }

        .gallery-body h4 {
            font-size: 1.1rem;
            margin-bottom: 8px;
        }

        .gallery-body p {
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        /* Comparison Board */
        .comparison-section {
            background-color: var(--light-bg);
        }

        .score-card {
            background: linear-gradient(135deg, var(--dark) 0%, #1e293b 100%);
            color: #ffffff;
            padding: 40px;
            border-radius: 16px;
            text-align: center;
            margin-bottom: 40px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
        }

        .score-value {
            font-size: 4rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1;
        }

        .score-stars {
            color: #ffd600;
            font-size: 1.8rem;
            margin: 15px 0;
        }

        .table-wrapper {
            overflow-x: auto;
            background-color: var(--card-bg);
            border-radius: 12px;
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 15px rgba(0,0,0,0.02);
        }

        table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 600px;
        }

        th, td {
            padding: 16px 24px;
            border-bottom: 1px solid var(--border-color);
        }

        th {
            background-color: #f1f5f9;
            color: var(--dark);
            font-weight: 700;
        }

        tr:last-child td {
            border-bottom: none;
        }

        .highlight-col {
            background-color: rgba(0, 82, 255, 0.02);
            font-weight: 600;
        }

        .badge-yes {
            color: #10b981;
            font-weight: bold;
        }

        .badge-no {
            color: #ef4444;
            font-weight: bold;
        }

        /* Token Pricing & Matcher */
        .pricing-section {
            background-color: #ffffff;
        }

        .pricing-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }

        /* Form styling */
        .matcher-form {
            background-color: var(--light-bg);
            padding: 30px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            font-size: 0.95rem;
        }

        .form-control {
            width: 100%;
            padding: 12px;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            background-color: #ffffff;
            color: var(--text-main);
            font-size: 1rem;
            transition: var(--transition);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(0, 82, 255, 0.1);
        }

        /* Training section */
        .training-section {
            background-color: var(--light-bg);
        }

        /* FAQ Section */
        .faq-section {
            background-color: #ffffff;
        }

        .faq-accordion {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            border-bottom: 1px solid var(--border-color);
            padding: 16px 0;
        }

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            padding: 8px 0;
        }

        .faq-question h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--dark);
        }

        .faq-icon {
            font-size: 1.5rem;
            color: var(--primary);
            transition: var(--transition);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            padding-right: 20px;
        }

        .faq-answer p {
            color: var(--text-muted);
            font-size: 0.95rem;
            padding: 10px 0;
        }

        .faq-item.active .faq-answer {
            max-height: 200px;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }

        /* Term Encyclopedia */
        .encyclopedia-section {
            background-color: var(--light-bg);
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            max-width: 900px;
            margin: 0 auto;
        }

        .cloud-tag {
            background-color: var(--card-bg);
            border: 1px solid var(--border-color);
            padding: 8px 16px;
            border-radius: 4px;
            font-size: 0.9rem;
            color: var(--text-main);
            font-weight: 500;
        }

        /* Reviews */
        .reviews-section {
            background-color: #ffffff;
        }

        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .review-card {
            background-color: var(--light-bg);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .review-text {
            font-style: italic;
            color: var(--text-main);
            margin-bottom: 20px;
        }

        .review-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .author-info h5 {
            font-weight: bold;
            color: var(--dark);
        }

        .author-info span {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* News Section */
        .news-section {
            background-color: var(--light-bg);
        }

        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
        }

        .news-card {
            background-color: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 24px;
            transition: var(--transition);
        }

        .news-card:hover {
            border-color: var(--primary);
            transform: translateY(-3px);
        }

        .news-date {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 8px;
            display: block;
        }

        .news-card h4 {
            margin-bottom: 12px;
            font-size: 1.15rem;
        }

        .news-card p {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-bottom: 16px;
        }

        .news-link {
            color: var(--primary);
            font-weight: 600;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        /* Contact Section */
        .contact-section {
            background-color: #ffffff;
        }

        .contact-layout {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 50px;
        }

        .contact-info {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }

        .info-item {
            display: flex;
            gap: 16px;
        }

        .info-icon {
            font-size: 1.5rem;
            color: var(--primary);
        }

        .info-content h4 {
            font-size: 1.1rem;
            margin-bottom: 4px;
        }

        .info-content p, .info-content a {
            color: var(--text-muted);
        }

        .qr-codes {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            margin-top: 20px;
        }

        .qr-item {
            text-align: center;
            font-size: 0.8rem;
            font-weight: bold;
            color: var(--dark);
        }

        .qr-item img {
            border: 1px solid var(--border-color);
            border-radius: 8px;
            margin-bottom: 8px;
            width: 100%;
        }

        /* Footer */
        footer {
            background-color: var(--dark);
            color: #94a3b8;
            padding: 60px 0 20px 0;
            font-size: 0.9rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-col h4 {
            color: #ffffff;
            margin-bottom: 20px;
            font-size: 1.1rem;
        }

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

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

        .footer-links a {
            color: #94a3b8;
        }

        .footer-links a:hover {
            color: #ffffff;
        }

        .friend-links {
            border-top: 1px solid #334155;
            padding: 20px 0;
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            align-items: center;
        }

        .friend-links span {
            font-weight: bold;
            color: #cbd5e1;
        }

        .friend-links a {
            color: #94a3b8;
            margin-right: 10px;
        }

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

        .footer-bottom {
            border-top: 1px solid #334155;
            padding-top: 20px;
            text-align: center;
            font-size: 0.8rem;
        }

        /* Float Customer Service */
        .float-service {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: var(--primary);
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 10px rgba(0,0,0,0.15);
            cursor: pointer;
            position: relative;
        }

        .float-btn:hover {
            background-color: var(--secondary);
        }

        .qr-popover {
            position: absolute;
            bottom: 60px;
            right: 0;
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            padding: 12px;
            border-radius: 8px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.15);
            display: none;
            width: 140px;
            text-align: center;
        }

        .qr-popover img {
            width: 100%;
            height: auto;
            margin-bottom: 5px;
        }

        .qr-popover span {
            font-size: 0.75rem;
            color: var(--dark);
            font-weight: bold;
        }

        .float-btn:hover .qr-popover {
            display: block;
        }

        /* Responsive design */
        @media (max-width: 992px) {
            .hero-title {
                font-size: 2.2rem;
            }
            .about-layout, .network-grid, .pricing-layout, .contact-layout {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background-color: #ffffff;
                border-bottom: 1px solid var(--border-color);
                padding: 20px;
                gap: 15px;
            }
            .nav-menu.active {
                display: flex;
            }
            .menu-toggle {
                display: flex;
            }
        }

        @media (max-width: 576px) {
            .hero-title {
                font-size: 1.8rem;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .qr-codes {
                grid-template-columns: 1fr;
            }
        }