:root {
            --primary: #2563eb;
            --primary-hover: #1d4ed8;
            --secondary: #f97316;
            --secondary-hover: #ea580c;
            --accent: #10b981;
            --bg-light: #f8fafc;
            --bg-white: #ffffff;
            --text-main: #0f172a;
            --text-muted: #475569;
            --border-color: #e2e8f0;
            --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
            --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
            --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
            --radius-md: 12px;
            --radius-lg: 20px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* Reset & Global */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--text-main);
            background-color: var(--bg-light);
        }
        body {
            line-height: 1.6;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        /* Layout Container */
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Navigation Header */
        header {
            background-color: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .ai-page-logo {
            height: 40px;
            width: auto;
        }
        .logo-text {
            font-size: 20px;
            font-weight: 850;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 24px;
        }
        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-muted);
        }
        .nav-link:hover {
            color: var(--primary);
        }
        .nav-btn {
            background-color: var(--primary);
            color: white;
            padding: 10px 20px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 14px;
            border: none;
            cursor: pointer;
            box-shadow: var(--shadow-sm);
        }
        .nav-btn:hover {
            background-color: var(--primary-hover);
            transform: translateY(-1px);
        }
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 6px;
            cursor: pointer;
            border: none;
            background: transparent;
        }
        .menu-toggle span {
            display: block;
            width: 25px;
            height: 3px;
            background-color: var(--text-main);
            border-radius: 2px;
            transition: var(--transition);
        }

        /* Hero Section (No Image, High Contrast, Dynamic Gradient) */
        .hero {
            padding: 160px 0 100px 0;
            background: linear-gradient(135deg, #eff6ff 0%, #fef3c7 50%, #ecfdf5 100%);
            position: relative;
            overflow: hidden;
            text-align: center;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            padding: 6px 16px;
            background-color: rgba(37, 99, 235, 0.1);
            color: var(--primary);
            font-weight: 600;
            font-size: 14px;
            border-radius: 100px;
            margin-bottom: 24px;
            border: 1px solid rgba(37, 99, 235, 0.15);
        }
        .hero-title {
            font-size: 48px;
            font-weight: 800;
            line-height: 1.25;
            color: var(--text-main);
            max-width: 900px;
            margin: 0 auto 24px auto;
        }
        .hero-desc {
            font-size: 18px;
            color: var(--text-muted);
            max-width: 700px;
            margin: 0 auto 36px auto;
        }
        .hero-actions {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary {
            background-color: var(--primary);
            color: white;
            padding: 16px 36px;
            border-radius: 50px;
            font-size: 16px;
            font-weight: 600;
            box-shadow: 0 10px 15px -3px rgba(37, 99, 235, 0.3);
        }
        .btn-primary:hover {
            background-color: var(--primary-hover);
            transform: translateY(-2px);
        }
        .btn-secondary {
            background-color: var(--bg-white);
            color: var(--text-main);
            padding: 16px 36px;
            border-radius: 50px;
            font-size: 16px;
            font-weight: 600;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }
        .btn-secondary:hover {
            background-color: var(--bg-light);
            border-color: #cbd5e1;
            transform: translateY(-2px);
        }

        /* Decorative CSS Elements for Hero */
        .hero-decor-1 {
            position: absolute;
            top: 20%;
            left: 5%;
            width: 120px;
            height: 120px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(37,99,235,0.15) 0%, transparent 70%);
            animation: float 6s ease-in-out infinite alternate;
        }
        .hero-decor-2 {
            position: absolute;
            bottom: 15%;
            right: 5%;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(249,115,22,0.15) 0%, transparent 70%);
            animation: float 8s ease-in-out infinite alternate-reverse;
        }

        /* Section Layout Utilities */
        section {
            padding: 90px 0;
            border-bottom: 1px solid var(--border-color);
        }
        .section-title-wrap {
            text-align: center;
            margin-bottom: 50px;
        }
        .section-subtitle {
            font-size: 14px;
            color: var(--primary);
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 12px;
            display: block;
        }
        .section-title {
            font-size: 36px;
            font-weight: 800;
            color: var(--text-main);
        }

        /* Data Metrics Grid */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: -50px;
            position: relative;
            z-index: 10;
        }
        .metric-card {
            background-color: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 30px 20px;
            text-align: center;
            box-shadow: var(--shadow-lg);
            border: 1px solid rgba(226, 232, 240, 0.8);
            transition: var(--transition);
        }
        .metric-card:hover {
            transform: translateY(-5px);
        }
        .metric-num {
            font-size: 40px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 8px;
            line-height: 1;
        }
        .metric-label {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 600;
        }

        /* About Us & Platform Intro */
        .about-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .about-text h3 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--text-main);
        }
        .about-text p {
            color: var(--text-muted);
            margin-bottom: 24px;
            font-size: 16px;
        }
        .feature-bullets {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }
        .bullet-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 600;
            color: var(--text-main);
        }
        .bullet-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background-color: rgba(16, 185, 129, 0.1);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
        }
        .about-media-box {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        /* Model Badges Grid (All Platforms) */
        .model-list-grid {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 16px;
            margin-top: 30px;
        }
        .model-badge {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 16px;
            border-radius: var(--radius-md);
            text-align: center;
            font-weight: 700;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .model-badge:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: scale(1.05);
            box-shadow: var(--shadow-md);
        }

        /* One-stop AIGC Solutions Cards */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .service-card {
            background-color: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 40px 30px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(37, 99, 235, 0.2);
        }
        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background-color: var(--primary);
            opacity: 0;
            transition: var(--transition);
        }
        .service-card:hover::before {
            opacity: 1;
        }
        .service-icon {
            font-size: 32px;
            color: var(--primary);
            margin-bottom: 24px;
        }
        .service-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .service-card p {
            color: var(--text-muted);
            font-size: 14px;
        }

        /* Flow & Timeline */
        .timeline {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }
        .timeline-step {
            background-color: var(--bg-white);
            padding: 30px 24px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            position: relative;
        }
        .step-num {
            position: absolute;
            top: -20px;
            left: 24px;
            width: 40px;
            height: 40px;
            background-color: var(--secondary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            box-shadow: 0 4px 6px rgba(249,115,22,0.3);
        }
        .timeline-step h4 {
            font-size: 18px;
            font-weight: 700;
            margin: 10px 0 12px 0;
        }
        .timeline-step p {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* Comparison Board */
        .comparison-table-wrap {
            overflow-x: auto;
            background-color: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-md);
        }
        table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 700px;
        }
        th, td {
            padding: 18px 24px;
            border-bottom: 1px solid var(--border-color);
        }
        th {
            background-color: #f1f5f9;
            font-weight: 700;
            color: var(--text-main);
        }
        tr:last-child td {
            border-bottom: none;
        }
        .tag-winner {
            background-color: rgba(16, 185, 129, 0.1);
            color: var(--accent);
            padding: 4px 10px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 12px;
        }
        .rating-box {
            background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
            border: 1px solid #fde68a;
            padding: 24px;
            border-radius: var(--radius-md);
            margin-top: 30px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 20px;
        }
        .rating-score {
            font-size: 24px;
            font-weight: 800;
            color: #d97706;
        }

        /* Interactive Form & Custom Form Style */
        .interactive-form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
        }
        .form-info h3 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .form-info p {
            color: var(--text-muted);
            margin-bottom: 30px;
        }
        .form-card {
            background-color: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 40px;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border-color);
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-main);
        }
        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            font-size: 15px;
            background-color: var(--bg-light);
            outline: none;
            transition: var(--transition);
        }
        .form-control:focus {
            border-color: var(--primary);
            background-color: white;
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }
        .btn-submit {
            width: 100%;
            background-color: var(--secondary);
            color: white;
            border: none;
            padding: 14px;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 16px;
            cursor: pointer;
            box-shadow: 0 4px 6px rgba(249, 115, 22, 0.2);
            transition: var(--transition);
        }
        .btn-submit:hover {
            background-color: var(--secondary-hover);
        }

        /* FAQ (Accordion) */
        .faq-accordion {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-header {
            padding: 20px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 700;
            font-size: 16px;
            user-select: none;
        }
        .faq-header:hover {
            background-color: #f8fafc;
        }
        .faq-icon {
            font-size: 20px;
            transition: var(--transition);
        }
        .faq-content {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.7;
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }
        .faq-item.active .faq-content {
            padding-bottom: 20px;
        }

        /* Testimonials Section */
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .comment-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 30px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
        }
        .comment-stars {
            color: #fbbf24;
            margin-bottom: 12px;
        }
        .comment-text {
            color: var(--text-muted);
            font-size: 14px;
            margin-bottom: 20px;
            font-style: italic;
        }
        .comment-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .author-avatar {
            width: 44px;
            height: 44px;
            background-color: #e2e8f0;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--primary);
        }
        .author-info h5 {
            font-weight: 700;
            font-size: 14px;
        }
        .author-info span {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* Knowledge Base / Articles Section */
        .knowledge-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }
        .article-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: var(--transition);
        }
        .article-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
        }
        .article-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .article-link {
            color: var(--primary);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 12px;
        }

        /* Floating Contact Box */
        .floating-contact {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .floating-btn {
            width: 56px;
            height: 56px;
            background-color: var(--primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-lg);
            cursor: pointer;
            position: relative;
        }
        .floating-btn:hover {
            transform: scale(1.1);
        }
        .floating-btn .hover-qr {
            position: absolute;
            bottom: 70px;
            right: 0;
            background: white;
            padding: 16px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border-color);
            display: none;
            width: 180px;
        }
        .floating-btn:hover .hover-qr {
            display: block;
        }

        /* Footer */
        footer {
            background-color: #0f172a;
            color: #94a3b8;
            padding: 80px 0 30px 0;
            border-top: none;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 2fr;
            gap: 40px;
            margin-bottom: 50px;
        }
        .footer-logo-desc p {
            margin-top: 16px;
            font-size: 14px;
            line-height: 1.7;
        }
        .footer-title {
            color: white;
            font-weight: 700;
            font-size: 16px;
            margin-bottom: 20px;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a:hover {
            color: white;
        }
        .footer-qr-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            text-align: center;
            font-size: 12px;
        }
        .footer-qr-box img {
            border-radius: 8px;
            margin-bottom: 8px;
            background-color: white;
            padding: 4px;
        }
        .friendship-links {
            border-top: 1px solid #334155;
            padding-top: 30px;
            margin-bottom: 30px;
        }
        .friendship-links h5 {
            color: white;
            margin-bottom: 12px;
            font-size: 14px;
        }
        .friendship-links-list {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }
        .friendship-links-list a {
            font-size: 13px;
            color: #94a3b8;
        }
        .friendship-links-list a:hover {
            color: white;
        }
        .copyright-area {
            border-top: 1px solid #334155;
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            flex-wrap: wrap;
            gap: 16px;
        }

        /* Animations */
        @keyframes float {
            0% { transform: translateY(0px) rotate(0deg); }
            100% { transform: translateY(-15px) rotate(5deg); }
        }
        .fade-in {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.6s ease-out, transform 0.6s ease-out;
        }
        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* Responsive Breakpoints */
        @media (max-width: 1024px) {
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                margin-top: 20px;
            }
            .about-wrap {
                grid-template-columns: 1fr;
            }
            .model-list-grid {
                grid-template-columns: repeat(4, 1fr);
            }
            .services-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .timeline {
                grid-template-columns: repeat(2, 1fr);
            }
            .timeline-step {
                margin-top: 20px;
            }
            .testimonials-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .hero-title {
                font-size: 32px;
            }
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background-color: var(--bg-white);
                border-bottom: 1px solid var(--border-color);
                padding: 24px;
                gap: 16px;
                box-shadow: var(--shadow-md);
            }
            .nav-menu.active {
                display: flex;
            }
            .menu-toggle {
                display: flex;
            }
            .interactive-form-grid {
                grid-template-columns: 1fr;
            }
            .knowledge-grid {
                grid-template-columns: 1fr;
            }
            .model-list-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .services-grid {
                grid-template-columns: 1fr;
            }
            .testimonials-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .copyright-area {
                flex-direction: column;
                text-align: center;
            }
        }