:root {
            --primary: #FF5500;
            --primary-hover: #E04400;
            --secondary: #FF8800;
            --dark-bg: #1A1A1A;
            --light-bg: #FFFDFB;
            --section-bg: #FFF8F2;
            --card-bg: #FFFFFF;
            --border-color: #FFEADF;
            --text-main: #2C2C2C;
            --text-muted: #666666;
            --success: #10B981;
            --shadow: 0 4px 20px rgba(255, 85, 0, 0.06);
            --shadow-hover: 0 10px 30px rgba(255, 85, 0, 0.12);
        }

        * {
            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);
            line-height: 1.6;
        }

        body {
            overflow-x: hidden;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            width: 100%;
        }

        /* Header & Nav */
        header {
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 2px 10px rgba(0,0,0,0.02);
        }

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

        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
        }

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

        .brand-name {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 0.5px;
        }

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

        .nav-menu a {
            text-decoration: none;
            color: var(--text-main);
            font-weight: 500;
            font-size: 0.95rem;
            transition: color 0.3s;
        }

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

        .nav-btn {
            background-color: var(--primary);
            color: #fff !important;
            padding: 8px 18px;
            border-radius: 20px;
            font-weight: 600 !important;
            transition: background 0.3s;
        }

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

        .menu-toggle {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            color: var(--primary);
            cursor: pointer;
        }

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

        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-header h2 {
            font-size: 2.2rem;
            color: var(--dark-bg);
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
        }

        .section-header h2::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            width: 50px;
            height: 4px;
            background: var(--primary);
            border-radius: 2px;
        }

        .section-header p {
            color: var(--text-muted);
            font-size: 1.1rem;
            max-width: 700px;
            margin: 0 auto;
        }

        /* 1. Hero Section (NO IMAGES AS PER INSTRUCTION) */
        #home {
            padding-top: 140px;
            padding-bottom: 100px;
            background: radial-gradient(circle at 80% 20%, rgba(255, 85, 0, 0.08) 0%, rgba(255, 255, 255, 0) 60%), linear-gradient(135deg, #FFFDFB 0%, #FFF5EE 100%);
            text-align: center;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            background: rgba(255, 85, 0, 0.08);
            color: var(--primary);
            padding: 6px 16px;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 700;
            margin-bottom: 25px;
            border: 1px solid rgba(255, 85, 0, 0.15);
        }

        .hero-title {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.25;
            color: var(--dark-bg);
            max-width: 900px;
            margin: 0 auto 25px auto;
        }

        .hero-desc {
            font-size: 1.25rem;
            color: var(--text-muted);
            max-width: 750px;
            margin: 0 auto 40px auto;
        }

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

        .btn-primary {
            display: inline-block;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            text-decoration: none;
            padding: 14px 32px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 1.05rem;
            box-shadow: 0 4px 15px rgba(255, 85, 0, 0.3);
            transition: all 0.3s;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(255, 85, 0, 0.4);
        }

        .btn-secondary {
            display: inline-block;
            background: #fff;
            color: var(--primary);
            text-decoration: none;
            padding: 14px 32px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 1.05rem;
            border: 2px solid var(--primary);
            transition: all 0.3s;
        }

        .btn-secondary:hover {
            background: rgba(255, 85, 0, 0.05);
            transform: translateY(-2px);
        }

        /* 2. Data Indicators */
        .data-cards {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 50px;
        }

        .data-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 25px;
            text-align: center;
            box-shadow: var(--shadow);
            transition: transform 0.3s;
        }

        .data-card:hover {
            transform: translateY(-5px);
        }

        .data-num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 5px;
        }

        .data-label {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* 3. About Us (Platform Intro) */
        #about {
            background-color: var(--section-bg);
        }

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

        .about-text h3 {
            font-size: 1.8rem;
            margin-bottom: 20px;
            color: var(--dark-bg);
        }

        .about-text p {
            margin-bottom: 15px;
            color: var(--text-muted);
        }

        .about-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-top: 30px;
        }

        .about-feat-item {
            background: #fff;
            padding: 15px;
            border-radius: 8px;
            border-left: 4px solid var(--primary);
            box-shadow: 0 2px 10px rgba(0,0,0,0.01);
        }

        .about-feat-item h4 {
            font-size: 1rem;
            margin-bottom: 5px;
            color: var(--dark-bg);
        }

        .about-feat-item p {
            font-size: 0.85rem;
            margin-bottom: 0;
        }

        /* 4. All Platform AIGC Services */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

        .service-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 30px;
            box-shadow: var(--shadow);
            transition: all 0.3s;
        }

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
        }

        .service-icon {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: 20px;
        }

        .service-card h3 {
            font-size: 1.3rem;
            margin-bottom: 12px;
            color: var(--dark-bg);
        }

        .service-card p {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-bottom: 15px;
        }

        .model-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }

        .model-tag {
            background: #FFF0E6;
            color: var(--primary);
            font-size: 0.75rem;
            padding: 3px 8px;
            border-radius: 4px;
            font-weight: 500;
        }

        /* 5. One-Stop AIGC Production */
        .production-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .prod-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 20px;
            box-shadow: var(--shadow);
            text-align: center;
        }

        .prod-card h4 {
            color: var(--dark-bg);
            margin: 15px 0 10px 0;
            font-size: 1.1rem;
        }

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

        /* 6. Industry Solutions */
        #solutions {
            background-color: var(--section-bg);
        }

        .solution-tabs {
            display: flex;
            justify-content: center;
            gap: 15px;
            margin-bottom: 40px;
            flex-wrap: wrap;
        }

        .solution-tab-btn {
            background: #fff;
            border: 1px solid var(--border-color);
            padding: 10px 24px;
            border-radius: 20px;
            cursor: pointer;
            font-weight: 600;
            transition: all 0.3s;
        }

        .solution-tab-btn.active, .solution-tab-btn:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        .solution-content {
            background: #fff;
            border-radius: 16px;
            padding: 40px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow);
        }

        .solution-panel {
            display: none;
        }

        .solution-panel.active {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .sol-list {
            list-style: none;
            margin-top: 20px;
        }

        .sol-list li {
            position: relative;
            padding-left: 25px;
            margin-bottom: 12px;
            font-size: 0.95rem;
        }

        .sol-list li::before {
            content: "✓";
            color: var(--primary);
            position: absolute;
            left: 0;
            font-weight: bold;
        }

        /* 7. National Service Network & 8. Steps & 9. Standards */
        .step-timeline {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
            position: relative;
            margin-top: 40px;
        }

        .step-item {
            text-align: center;
            position: relative;
        }

        .step-num {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 15px auto;
            font-weight: 700;
            font-size: 1.2rem;
            box-shadow: 0 4px 10px rgba(255, 85, 0, 0.2);
        }

        .step-item h4 {
            font-size: 1.1rem;
            margin-bottom: 8px;
            color: var(--dark-bg);
        }

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

        /* 10. Cases with Images */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .case-card {
            background: #fff;
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow);
            transition: transform 0.3s;
        }

        .case-card:hover {
            transform: translateY(-5px);
        }

        .case-img-wrap {
            width: 100%;
            height: 200px;
            overflow: hidden;
            background: #eee;
        }

        .case-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .case-info {
            padding: 20px;
        }

        .case-info h4 {
            font-size: 1.15rem;
            margin-bottom: 10px;
            color: var(--dark-bg);
        }

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

        /* 11. Comparison Evaluation */
        .comparison-table-wrapper {
            overflow-x: auto;
            margin-top: 30px;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            background: #fff;
        }

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

        .comparison-table th, .comparison-table td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--border-color);
        }

        .comparison-table th {
            background-color: var(--section-bg);
            color: var(--dark-bg);
            font-weight: 700;
        }

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

        .rating-badge {
            background: var(--primary);
            color: #fff;
            padding: 2px 8px;
            border-radius: 4px;
            font-weight: 700;
            font-size: 0.85rem;
        }

        /* 12. Token & Matching */
        .matching-box {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 40px;
            box-shadow: var(--shadow);
            max-width: 800px;
            margin: 0 auto;
        }

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

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--dark-bg);
        }

        .form-control {
            width: 100%;
            padding: 12px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            font-size: 1rem;
            background: #FFFDFB;
            transition: border 0.3s;
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
        }

        /* 13. Training */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 15px;
        }

        .train-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 20px;
            text-align: center;
            transition: all 0.3s;
        }

        .train-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow);
        }

        .train-icon {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 10px;
        }

        .train-card h4 {
            font-size: 0.95rem;
            color: var(--dark-bg);
        }

        /* 14. FAQ Section */
        .faq-list {
            max-width: 900px;
            margin: 0 auto;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            margin-bottom: 12px;
            overflow: hidden;
        }

        .faq-quest {
            padding: 18px 24px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            color: var(--dark-bg);
            transition: background 0.3s;
            user-select: none;
        }

        .faq-quest:hover {
            background: var(--section-bg);
        }

        .faq-quest::after {
            content: "+";
            font-size: 1.4rem;
            color: var(--primary);
            transition: transform 0.3s;
        }

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

        .faq-ans {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background: #FFFDFB;
        }

        .faq-ans-content {
            padding: 20px 24px;
            border-top: 1px solid var(--border-color);
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        /* 15. User Reviews */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

        .review-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 25px;
            box-shadow: var(--shadow);
        }

        .review-user {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 15px;
        }

        .review-avatar {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background: var(--section-bg);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
        }

        .review-meta h5 {
            font-size: 0.95rem;
            color: var(--dark-bg);
        }

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

        .review-content {
            font-size: 0.9rem;
            color: var(--text-muted);
            font-style: italic;
        }

        /* 16. Articles Section */
        .articles-list {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

        .article-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 20px;
            transition: all 0.3s;
        }

        .article-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow);
        }

        .article-card h4 {
            font-size: 1.1rem;
            margin-bottom: 12px;
        }

        .article-card a {
            color: var(--primary);
            text-decoration: none;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 0.9rem;
        }

        .article-card a:hover {
            color: var(--primary-hover);
        }

        /* 17. Contact & Submit Form */
        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 50px;
        }

        .contact-info-panel {
            background: var(--section-bg);
            border-radius: 16px;
            padding: 40px;
            border: 1px solid var(--border-color);
        }

        .contact-info-panel h3 {
            margin-bottom: 25px;
            font-size: 1.6rem;
            color: var(--dark-bg);
        }

        .contact-list {
            list-style: none;
        }

        .contact-list li {
            margin-bottom: 20px;
            display: flex;
            align-items: flex-start;
            gap: 15px;
        }

        .contact-icon {
            color: var(--primary);
            font-weight: bold;
            font-size: 1.1rem;
        }

        .qrcode-box {
            margin-top: 30px;
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }

        .qrcode-item {
            text-align: center;
            background: #fff;
            padding: 10px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            width: 140px;
        }

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

        .qrcode-item span {
            font-size: 0.8rem;
            color: var(--text-muted);
            display: block;
        }

        /* 18. Tag Cloud */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-top: 30px;
        }

        .cloud-tag {
            background: #fff;
            border: 1px solid var(--border-color);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.9rem;
            color: var(--text-main);
            transition: all 0.3s;
        }

        .cloud-tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: scale(1.05);
        }

        /* Footer */
        footer {
            background-color: var(--dark-bg);
            color: #ccc;
            padding: 60px 0 30px 0;
            border-top: 3px solid var(--primary);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand h4 {
            color: #fff;
            font-size: 1.4rem;
            margin-bottom: 15px;
        }

        .footer-links h5, .footer-contact h5 {
            color: #fff;
            font-size: 1.1rem;
            margin-bottom: 15px;
        }

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

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

        .footer-links a {
            color: #bbb;
            text-decoration: none;
            transition: color 0.3s;
        }

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

        .footer-bottom {
            border-top: 1px solid #333;
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 0.9rem;
        }

        .friendship-links {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
        }

        .friendship-links a {
            color: #888;
            text-decoration: none;
            transition: color 0.3s;
        }

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

        /* Floating Widgets */
        .floating-widgets {
            position: fixed;
            right: 20px;
            bottom: 30px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            z-index: 999;
        }

        .widget-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
            cursor: pointer;
            text-decoration: none;
            font-weight: 700;
            transition: all 0.3s;
            position: relative;
        }

        .widget-btn:hover {
            background: var(--primary-hover);
            transform: scale(1.05);
        }

        .widget-qr-hover {
            position: absolute;
            right: 60px;
            bottom: 0;
            background: #fff;
            border: 1px solid var(--border-color);
            padding: 10px;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            display: none;
            width: 140px;
            text-align: center;
        }

        .widget-qr-hover img {
            width: 100%;
            height: auto;
        }

        .widget-qr-hover span {
            color: var(--text-main);
            font-size: 0.8rem;
            margin-top: 5px;
            display: block;
        }

        .widget-btn:hover .widget-qr-hover {
            display: block;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .services-grid, .cases-grid, .reviews-grid, .articles-list {
                grid-template-columns: repeat(2, 1fr);
            }
            .production-grid, .training-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .data-cards {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: #fff;
                border-bottom: 1px solid var(--border-color);
                padding: 20px;
                gap: 15px;
                box-shadow: 0 10px 20px rgba(0,0,0,0.05);
            }

            .nav-menu.active {
                display: flex;
            }

            .menu-toggle {
                display: block;
            }

            .about-grid, .solution-panel.active, .contact-grid, .footer-grid {
                grid-template-columns: 1fr;
            }

            .hero-title {
                font-size: 2.2rem;
            }

            .step-timeline {
                grid-template-columns: 1fr;
                gap: 30px;
            }

            .step-timeline::before {
                display: none;
            }

            .production-grid, .training-grid, .services-grid, .cases-grid, .reviews-grid, .articles-list {
                grid-template-columns: 1fr;
            }
        }