:root {
            --primary: #4f46e5;
            --primary-light: #818cf8;
            --primary-dark: #3730a3;
            --accent-pink: #ec4899;
            --accent-teal: #14b8a6;
            --accent-purple: #a855f7;
            --accent-orange: #f97316;
            
            --bg-base: #f8fafc;
            --bg-card: #ffffff;
            --text-dark: #0f172a;
            --text-muted: #475569;
            --border-color: #e2e8f0;
            --container-width: 1200px;
        }

        /* Base Reset */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans CJK SC", sans-serif;
            scroll-behavior: smooth;
        }

        body {
            background-color: var(--bg-base);
            color: var(--text-dark);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* Layout Container */
        .container {
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* Typography */
        h1, h2, h3, h4 {
            color: var(--text-dark);
            font-weight: 700;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: all 0.3s ease;
        }

        /* Color Accent Background Gradients (斑斓彩调风) */
        .gradient-text {
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent-purple) 50%, var(--accent-pink) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .gradient-btn {
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent-purple) 100%);
            color: #ffffff !important;
            border: none;
            padding: 0.75rem 1.5rem;
            border-radius: 9999px;
            font-weight: 600;
            box-shadow: 0 4px 15px rgba(79, 70, 229, 0.3);
            transition: transform 0.2s, box-shadow 0.2s;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
        }

        .gradient-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(79, 70, 229, 0.4);
        }

        /* Header Navigation */
        header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 4.5rem;
        }

        .logo-area {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .ai-page-logo {
            height: 2.2rem;
            object-fit: contain;
        }

        .brand-name {
            font-size: 1.25rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), var(--accent-purple));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        nav ul {
            display: flex;
            list-style: none;
            gap: 1.5rem;
            align-items: center;
        }

        nav a {
            color: var(--text-muted);
            font-size: 0.95rem;
            font-weight: 500;
        }

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

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

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

        /* Hero Section (No Image Restriction) */
        .hero-section {
            padding: 6rem 0 5rem;
            position: relative;
            background: radial-gradient(circle at 10% 20%, rgba(79, 70, 229, 0.05) 0%, rgba(168, 85, 247, 0.05) 90%);
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -20%;
            right: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(20, 184, 166, 0.1) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-content {
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
        }

        .hero-badge {
            display: inline-block;
            padding: 0.35rem 1rem;
            background: rgba(79, 70, 229, 0.08);
            border: 1px solid rgba(79, 70, 229, 0.15);
            color: var(--primary-dark);
            border-radius: 9999px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 1.5rem;
        }

        .hero-title-wrap {
            margin-bottom: 1.5rem;
        }

        .hero-title-wrap h1 {
            font-size: 3rem;
            line-height: 1.25;
            letter-spacing: -0.02em;
        }

        .hero-desc {
            font-size: 1.15rem;
            color: var(--text-muted);
            margin-bottom: 2.5rem;
            line-height: 1.7;
        }

        .hero-btns {
            display: flex;
            justify-content: center;
            gap: 1rem;
            flex-wrap: wrap;
        }

        .btn-outline {
            border: 1px solid var(--border-color);
            background: #ffffff;
            color: var(--text-dark) !important;
            padding: 0.75rem 1.5rem;
            border-radius: 9999px;
            font-weight: 600;
            transition: all 0.3s ease;
        }

        .btn-outline:hover {
            background: var(--bg-base);
            border-color: var(--text-muted);
        }

        /* Quick Stats Grid */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            margin-top: 4rem;
        }

        .stat-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 1.5rem;
            text-align: center;
            box-shadow: 0 4px 6px rgba(0,0,0,0.02);
            transition: transform 0.3s;
        }

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

        .stat-num {
            font-size: 2.25rem;
            font-weight: 800;
            margin-bottom: 0.25rem;
        }

        .stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* General Section Layout */
        section {
            padding: 5rem 0;
            border-bottom: 1px solid var(--border-color);
        }

        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 3.5rem;
        }

        .section-tag {
            font-size: 0.85rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            color: var(--accent-pink);
            margin-bottom: 0.5rem;
            display: block;
        }

        .section-title {
            font-size: 2rem;
            margin-bottom: 1rem;
        }

        .section-subtitle {
            color: var(--text-muted);
            font-size: 1rem;
        }

        /* About Us & Platform Intro */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3.5rem;
            align-items: center;
        }

        .about-text h3 {
            font-size: 1.5rem;
            margin-bottom: 1.25rem;
        }

        .about-text p {
            color: var(--text-muted);
            margin-bottom: 1.5rem;
            font-size: 0.95rem;
        }

        .about-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.25rem;
        }

        .about-feat-item {
            background: #ffffff;
            border-left: 3px solid var(--accent-purple);
            padding: 1rem;
            border-radius: 0 8px 8px 0;
            box-shadow: 0 2px 4px rgba(0,0,0,0.02);
        }

        .about-feat-item h4 {
            font-size: 0.95rem;
            margin-bottom: 0.25rem;
        }

        .about-feat-item p {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        /* Model Integration Section */
        .platform-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
            justify-content: center;
            max-width: 900px;
            margin: 0 auto;
        }

        .model-tag {
            background: #ffffff;
            border: 1px solid var(--border-color);
            color: var(--text-dark);
            padding: 0.5rem 1rem;
            border-radius: 9999px;
            font-size: 0.85rem;
            font-weight: 500;
            transition: all 0.2s;
        }

        .model-tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: scale(1.05);
            box-shadow: 0 4px 10px rgba(0,0,0,0.05);
        }

        /* Services & Scenarios */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }

        .service-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 2.25rem 2rem;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent-pink));
            opacity: 0;
            transition: opacity 0.3s;
        }

        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.05);
        }

        .service-card:hover::before {
            opacity: 1;
        }

        .service-icon {
            width: 3rem;
            height: 3rem;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: 1.5rem;
            font-weight: bold;
        }

        .service-card h3 {
            font-size: 1.25rem;
            margin-bottom: 0.75rem;
        }

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

        /* Process Steps */
        .process-flow {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            position: relative;
        }

        .process-step {
            background: #ffffff;
            border: 1px solid var(--border-color);
            padding: 2rem 1.5rem;
            border-radius: 12px;
            position: relative;
            z-index: 2;
        }

        .step-num {
            font-size: 2.5rem;
            font-weight: 800;
            color: rgba(79, 70, 229, 0.1);
            position: absolute;
            top: 0.5rem;
            right: 1rem;
        }

        .process-step h4 {
            font-size: 1.05rem;
            margin-bottom: 0.5rem;
            margin-top: 1rem;
        }

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

        /* Comparison Board */
        .comparison-wrap {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 2.5rem;
            box-shadow: 0 4px 20px rgba(0,0,0,0.02);
        }

        .comp-score-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 2.5rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px solid var(--border-color);
            flex-wrap: wrap;
            gap: 1.5rem;
        }

        .score-info {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .score-badge {
            background: linear-gradient(135deg, var(--accent-pink), var(--accent-orange));
            color: white;
            padding: 0.5rem 1.25rem;
            font-weight: 800;
            font-size: 1.5rem;
            border-radius: 8px;
        }

        .stars {
            color: #fbbf24;
            font-size: 1.25rem;
        }

        .table-responsive {
            width: 100%;
            overflow-x: auto;
        }

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

        th, td {
            padding: 1rem 1.25rem;
            border-bottom: 1px solid var(--border-color);
            font-size: 0.9rem;
        }

        th {
            background: var(--bg-base);
            font-weight: 700;
        }

        .highlight-col {
            background: rgba(79, 70, 229, 0.02);
            font-weight: 600;
        }

        .check-icon {
            color: #10b981;
            font-weight: bold;
        }

        .cross-icon {
            color: #ef4444;
        }

        /* Token Price Reference Table Style */
        .price-badge {
            display: inline-block;
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
            font-size: 0.8rem;
            background: #f1f5f9;
        }
        .price-badge.promo {
            background: #dcfce7;
            color: #15803d;
            font-weight: 600;
        }

        /* Showcase / Media Gallery */
        .gallery-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .gallery-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 4px 6px rgba(0,0,0,0.01);
            transition: all 0.3s;
        }

        .gallery-card:hover {
            transform: scale(1.02);
            box-shadow: 0 10px 15px rgba(0,0,0,0.05);
        }

        .gallery-img-wrap {
            width: 100%;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: #e2e8f0;
            position: relative;
        }

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

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

        .gallery-info {
            padding: 1.25rem;
        }

        .gallery-info h4 {
            font-size: 1rem;
            margin-bottom: 0.5rem;
        }

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

        /* Training & Certification */
        .training-cards {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 1rem;
        }

        .train-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 10px;
            padding: 1.25rem 1rem;
            text-align: center;
            box-shadow: 0 2px 4px rgba(0,0,0,0.02);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            min-height: 180px;
        }

        .train-card h4 {
            font-size: 0.95rem;
            margin-bottom: 0.5rem;
            color: var(--text-dark);
        }

        .train-badge {
            background: rgba(20, 184, 166, 0.08);
            border: 1px solid rgba(20, 184, 166, 0.15);
            color: var(--accent-teal);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.25rem 0.5rem;
            border-radius: 4px;
            display: inline-block;
            margin-top: auto;
        }

        /* FAQ Accordion */
        .faq-list {
            max-width: 900px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }

        .faq-item {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            overflow: hidden;
            transition: all 0.3s;
        }

        .faq-trigger {
            width: 100%;
            background: none;
            border: none;
            padding: 1.25rem 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            text-align: left;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-dark);
            outline: none;
        }

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

        .faq-content {
            padding: 0 1.5rem 1.25rem;
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        .faq-trigger::after {
            content: '+';
            font-size: 1.25rem;
            color: var(--primary);
            transition: transform 0.3s;
        }

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

        /* Testimonials */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .review-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 1.5rem;
            box-shadow: 0 4px 6px rgba(0,0,0,0.01);
        }

        .reviewer-info {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            margin-bottom: 1rem;
        }

        .reviewer-avatar {
            width: 2.5rem;
            height: 2.5rem;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary-light), var(--accent-purple));
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9rem;
        }

        .reviewer-name {
            font-weight: 600;
            font-size: 0.95rem;
        }

        .reviewer-title {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        .review-text {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* Forms & Contact Section */
        .contact-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3.5rem;
            align-items: start;
        }

        .contact-info-panel {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 2.5rem;
        }

        .contact-info-panel h3 {
            font-size: 1.5rem;
            margin-bottom: 1.5rem;
        }

        .contact-details {
            display: flex;
            flex-direction: column;
            gap: 1.25rem;
            margin-bottom: 2rem;
        }

        .contact-detail-item {
            display: flex;
            align-items: flex-start;
            gap: 0.75rem;
        }

        .contact-label {
            font-weight: 700;
            min-width: 5rem;
            font-size: 0.9rem;
        }

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

        .qr-codes {
            display: flex;
            gap: 1.5rem;
            flex-wrap: wrap;
        }

        .qr-box {
            text-align: center;
            border: 1px solid var(--border-color);
            padding: 0.75rem;
            border-radius: 8px;
            background: #ffffff;
        }

        .qr-box img {
            width: 100px;
            height: 100px;
            object-fit: cover;
            display: block;
            margin: 0 auto 0.5rem;
        }

        .qr-box p {
            font-size: 0.75rem;
            color: var(--text-muted);
            margin: 0;
        }

        /* Form Styling */
        .form-panel {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 2.5rem;
        }

        .form-group {
            margin-bottom: 1.25rem;
        }

        .form-group label {
            display: block;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
        }

        .form-control {
            width: 100%;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 0.75rem 1rem;
            font-size: 0.9rem;
            transition: all 0.3s;
            outline: none;
        }

        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
        }

        textarea.form-control {
            resize: vertical;
            min-height: 120px;
        }

        /* Footer & Links */
        footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 4rem 0 2rem;
        }

        footer h4 {
            color: #ffffff;
            font-size: 1rem;
            margin-bottom: 1.25rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2.5rem;
            margin-bottom: 3rem;
        }

        .footer-col p {
            font-size: 0.85rem;
            line-height: 1.6;
        }

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

        .footer-links li {
            margin-bottom: 0.75rem;
        }

        .footer-links a {
            color: #94a3b8;
            font-size: 0.85rem;
        }

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

        .footer-bottom {
            border-top: 1px solid #334155;
            padding-top: 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.8rem;
            flex-wrap: wrap;
            gap: 1rem;
        }

        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-top: 1rem;
        }

        .friend-links a {
            color: #64748b;
            font-size: 0.75rem;
        }

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

        /* Floating Contact widget */
        .floating-widget {
            position: fixed;
            right: 1.5rem;
            bottom: 1.5rem;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }

        .float-btn {
            width: 3.5rem;
            height: 3.5rem;
            border-radius: 50%;
            background: #ffffff;
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.3s;
            position: relative;
        }

        .float-btn:hover {
            transform: translateY(-3px);
            background: var(--primary);
            color: white;
            border-color: var(--primary);
        }

        .float-btn img {
            width: 1.5rem;
            height: 1.5rem;
        }

        .float-qr-pop {
            display: none;
            position: absolute;
            right: 4rem;
            bottom: 0;
            background: #ffffff;
            border: 1px solid var(--border-color);
            padding: 1rem;
            border-radius: 12px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.15);
            text-align: center;
            width: 150px;
        }

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

        .float-qr-pop img {
            width: 120px;
            height: 120px;
            margin-bottom: 0.5rem;
        }

        .float-qr-pop p {
            font-size: 0.75rem;
            color: var(--text-dark);
            margin: 0;
        }

        /* Top Home Link style */
        .ai-page-home-link {
            font-weight: 600;
        }

        /* Responsive Design */
        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .training-cards {
                grid-template-columns: repeat(3, 1fr);
            }
            .reviews-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            nav {
                display: none;
                position: absolute;
                top: 4.5rem;
                left: 0;
                right: 0;
                background: #ffffff;
                border-bottom: 1px solid var(--border-color);
                padding: 1.5rem;
                box-shadow: 0 10px 15px rgba(0,0,0,0.05);
            }
            nav.active {
                display: block;
            }
            nav ul {
                flex-direction: column;
                gap: 1rem;
                align-items: flex-start;
            }
            .nav-menu-toggle {
                display: block;
            }
            .about-grid, .contact-layout {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .process-flow {
                grid-template-columns: 1fr;
            }
            .gallery-grid {
                grid-template-columns: 1fr;
            }
            .training-cards {
                grid-template-columns: repeat(2, 1fr);
            }
            .reviews-grid {
                grid-template-columns: 1fr;
            }
            .hero-title-wrap h1 {
                font-size: 2.25rem;
            }
        }

        @media (max-width: 480px) {
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .grid-3 {
                grid-template-columns: 1fr;
            }
            .training-cards {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }