/* CSS Reset & Variables */
        :root {
            --primary: #6366f1;
            --primary-grad: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
            --secondary: #ec4899;
            --dark: #0f172a;
            --light-bg: #f8fafc;
            --card-bg: #ffffff;
            --gray-text: #475569;
            --border-color: #e2e8f0;
            --radius: 12px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--light-bg);
            color: var(--dark);
            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: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* Header */
        header {
            background-color: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
        }

        .nav-wrapper {
            display: flex;
            justify-content: space-between;
            align-items: center;
            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;
            background: var(--primary-grad);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .nav-links {
            display: flex;
            gap: 1.5rem;
            align-items: center;
        }

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

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

        .nav-cta {
            background: var(--primary-grad);
            color: #fff !important;
            padding: 8px 18px;
            border-radius: 50px;
            font-weight: bold;
            font-size: 0.9rem;
            box-shadow: 0 4px 10px rgba(99, 102, 241, 0.3);
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 15px rgba(99, 102, 241, 0.4);
        }

        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            border: none;
            background: none;
        }

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

        /* Hero Section (No Images!) */
        .hero {
            position: relative;
            padding: 100px 0 80px;
            background: radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.05) 0%, rgba(236, 72, 153, 0.05) 90.2%);
            overflow: hidden;
            text-align: center;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -20%;
            left: -10%;
            width: 50%;
            height: 60%;
            background: radial-gradient(circle, rgba(168, 85, 247, 0.1) 0%, transparent 70%);
            z-index: 1;
            pointer-events: none;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: -10%;
            right: -10%;
            width: 50%;
            height: 60%;
            background: radial-gradient(circle, rgba(236, 72, 153, 0.08) 0%, transparent 70%);
            z-index: 1;
            pointer-events: none;
        }

        .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(99, 102, 241, 0.1);
            color: var(--primary);
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 20px;
            letter-spacing: 1px;
            animation: pulse 2s infinite;
        }

        .hero-title {
            font-size: 3rem;
            line-height: 1.2;
            font-weight: 800;
            color: var(--dark);
            margin-bottom: 20px;
            max-width: 850px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero-title span {
            background: var(--primary-grad);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            font-size: 1.2rem;
            color: var(--gray-text);
            max-width: 650px;
            margin: 0 auto 35px;
        }

        .hero-actions {
            display: flex;
            justify-content: center;
            gap: 15px;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 28px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
        }

        .btn-primary {
            background: var(--primary-grad);
            color: #fff;
            box-shadow: 0 4px 15px rgba(99, 102, 241, 0.35);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(99, 102, 241, 0.45);
        }

        .btn-secondary {
            background: #fff;
            color: var(--dark);
            border: 1px solid var(--border-color);
        }

        .btn-secondary:hover {
            background: #f1f5f9;
            transform: translateY(-2px);
        }

        /* Stats Bar */
        .stats-bar {
            background: #fff;
            padding: 40px 0;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            box-shadow: inset 0 2px 4px rgba(0,0,0,0.02);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            text-align: center;
        }

        .stat-item h3 {
            font-size: 2.25rem;
            font-weight: 800;
            background: var(--primary-grad);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 5px;
        }

        .stat-item p {
            font-size: 0.9rem;
            color: var(--gray-text);
            font-weight: 500;
        }

        /* Section Global Styles */
        section {
            padding: 80px 0;
        }

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

        .section-tag {
            color: var(--secondary);
            font-size: 0.85rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 10px;
            display: block;
        }

        .section-title {
            font-size: 2.25rem;
            font-weight: 800;
            color: var(--dark);
            margin-bottom: 15px;
        }

        .section-desc {
            color: var(--gray-text);
            font-size: 1.05rem;
        }

        /* Section Styles & Cards */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 40px;
        }

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

        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.05);
            border-color: rgba(99, 102, 241, 0.3);
        }

        .card-icon {
            width: 50px;
            height: 50px;
            border-radius: 10px;
            background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(236, 72, 153, 0.1) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.5rem;
            margin-bottom: 20px;
        }

        .card-title {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 12px;
        }

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

        /* Models Aggregation Grid */
        .models-box {
            background: #fff;
            border-radius: var(--radius);
            padding: 40px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.02);
            border: 1px solid var(--border-color);
        }

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

        .model-tag {
            padding: 8px 16px;
            background: var(--light-bg);
            border: 1px solid var(--border-color);
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--dark);
            transition: var(--transition);
        }

        .model-tag:hover {
            background: var(--primary-grad);
            color: #fff;
            border-color: transparent;
            transform: scale(1.05);
        }

        /* Flow / Timeline */
        .flow-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

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

        .step-num {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary-grad);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            margin: 0 auto 15px;
            font-size: 1.1rem;
            box-shadow: 0 4px 10px rgba(99, 102, 241, 0.2);
        }

        .flow-step h4 {
            font-size: 1.1rem;
            margin-bottom: 8px;
            font-weight: 700;
        }

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

        /* Evaluation Comparison Section */
        .comparison-table-wrapper {
            overflow-x: auto;
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 15px rgba(0,0,0,0.02);
        }

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

        table.comparison-table th, table.comparison-table td {
            padding: 16px 24px;
            border-bottom: 1px solid var(--border-color);
            font-size: 0.95rem;
        }

        table.comparison-table th {
            background: #f8fafc;
            font-weight: 700;
            color: var(--dark);
        }

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

        .highlight-row {
            background: rgba(99, 102, 241, 0.02);
            font-weight: 500;
        }

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

        .cross-icon {
            color: #ef4444;
            font-weight: bold;
        }

        .score-badge {
            display: inline-block;
            padding: 4px 8px;
            background: #fef08a;
            color: #854d0e;
            border-radius: 4px;
            font-weight: 700;
            font-size: 0.85rem;
        }

        /* Cases Center (Media Showcase) */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

        .case-card {
            background: #fff;
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
        }

        .case-image-wrapper {
            position: relative;
            background: #e2e8f0;
            overflow: hidden;
            aspect-ratio: 16/9;
        }

        .case-image-wrapper img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

        .case-card:hover .case-image-wrapper img {
            transform: scale(1.05);
        }

        .case-badge {
            position: absolute;
            top: 15px;
            left: 15px;
            padding: 4px 12px;
            background: rgba(15, 23, 42, 0.8);
            backdrop-filter: blur(4px);
            color: #fff;
            border-radius: 4px;
            font-size: 0.75rem;
            font-weight: 600;
        }

        .case-content {
            padding: 24px;
        }

        .case-title {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .case-desc {
            color: var(--gray-text);
            font-size: 0.9rem;
        }

        /* Token Price list */
        .price-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .price-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 25px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .price-card.featured {
            border: 2px solid var(--primary);
            box-shadow: 0 10px 20px rgba(99, 102, 241, 0.08);
        }

        .price-card.featured::before {
            content: '首选推荐';
            position: absolute;
            top: 15px;
            right: -30px;
            background: var(--secondary);
            color: #fff;
            font-size: 0.7rem;
            padding: 4px 30px;
            transform: rotate(45deg);
            font-weight: bold;
        }

        .price-val {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            margin: 15px 0;
        }

        .price-val span {
            font-size: 0.9rem;
            color: var(--gray-text);
            font-weight: normal;
        }

        .price-features {
            list-style: none;
            margin-bottom: 20px;
        }

        .price-features li {
            padding: 6px 0;
            font-size: 0.85rem;
            color: var(--gray-text);
            border-bottom: 1px dashed var(--border-color);
        }

        .price-features li:last-child {
            border-bottom: none;
        }

        /* Training section */
        .training-card {
            background: linear-gradient(135deg, #1e1b4b 0%, #311042 100%);
            color: #fff;
            padding: 45px;
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
        }

        .training-info {
            max-width: 60%;
        }

        .training-tag {
            background: rgba(236, 72, 153, 0.2);
            color: #f472b6;
            border: 1px solid rgba(236, 72, 153, 0.4);
            padding: 4px 12px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            display: inline-block;
            margin-bottom: 15px;
        }

        .training-info h3 {
            font-size: 1.85rem;
            font-weight: 800;
            margin-bottom: 15px;
        }

        .training-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 12px;
            margin-top: 20px;
        }

        .training-list-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.95rem;
        }

        .training-list-item span {
            color: #ec4899;
            font-weight: bold;
        }

        .training-action {
            text-align: center;
        }

        /* Articles list */
        .articles-box {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 35px;
        }

        .articles-list {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .article-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-bottom: 15px;
            border-bottom: 1px solid var(--border-color);
        }

        .article-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .article-title {
            font-weight: 600;
            font-size: 1rem;
            color: var(--dark);
        }

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

        .article-date {
            font-size: 0.85rem;
            color: var(--gray-text);
        }

        /* FAQ Section */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 15px;
            max-width: 800px;
            margin: 0 auto;
        }

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

        .faq-question {
            padding: 20px 24px;
            font-weight: 600;
            font-size: 1.05rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: #fff;
            user-select: none;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background: #f8fafc;
            color: var(--gray-text);
            font-size: 0.95rem;
        }

        .faq-answer-inner {
            padding: 20px 24px;
            border-top: 1px solid var(--border-color);
        }

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

        .faq-icon::after {
            content: '+';
            font-size: 1.3rem;
            font-weight: bold;
            color: var(--primary);
        }

        .faq-item.active .faq-icon::after {
            content: '−';
        }

        /* 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: var(--radius);
            padding: 25px;
            position: relative;
        }

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

        .author-avatar {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background: var(--primary-grad);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: bold;
            font-size: 0.9rem;
        }

        .author-meta h4 {
            font-size: 0.95rem;
            font-weight: 700;
        }

        .author-meta p {
            font-size: 0.8rem;
            color: var(--gray-text);
        }

        .review-content {
            font-size: 0.9rem;
            color: var(--gray-text);
            line-height: 1.5;
        }

        /* Contact & Form Section */
        .contact-layout {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 50px;
        }

        .form-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 40px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.02);
        }

        .form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-bottom: 20px;
        }

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .form-group-full {
            grid-column: span 2;
        }

        .form-group label {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--dark);
        }

        .form-group input, .form-group select, .form-group textarea {
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            font-size: 0.95rem;
            color: var(--dark);
            outline: none;
            transition: var(--transition);
        }

        .form-group input:focus, .form-group select:focus, .form-group textarea:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
        }

        .form-group textarea {
            height: 120px;
            resize: none;
        }

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

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

        .qr-wrapper {
            display: flex;
            align-items: center;
            gap: 20px;
            margin-top: 15px;
        }

        .qr-wrapper img {
            width: 100px;
            height: 100px;
            border: 1px solid var(--border-color);
            padding: 5px;
            border-radius: 6px;
            background: #fff;
        }

        .qr-text p {
            font-size: 0.9rem;
            margin-bottom: 4px;
        }

        /* Footer */
        footer {
            background-color: #0f172a;
            color: #94a3b8;
            padding: 60px 0 30px;
            font-size: 0.9rem;
            border-top: 1px solid #1e293b;
        }

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

        .footer-logo {
            margin-bottom: 15px;
        }

        .footer-logo img {
            max-height: 45px;
        }

        .footer-links-col h4 {
            color: #f1f5f9;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 15px;
        }

        .footer-links-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

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

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

        .footer-bottom {
            padding-top: 30px;
            border-top: 1px solid #1e293b;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
        }

        .friend-links-box {
            margin-top: 20px;
            padding-top: 20px;
            border-top: 1px dashed #1e293b;
        }

        .friend-links-box a {
            color: #64748b;
            margin-right: 15px;
            font-size: 0.8rem;
            display: inline-block;
        }

        .friend-links-box a:hover {
            color: #cbd5e1;
        }

        /* Back to top & floating contact */
        .floating-widgets {
            position: fixed;
            bottom: 30px;
            right: 30px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            z-index: 99;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: #fff;
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
        }

        .float-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 16px rgba(0,0,0,0.15);
            background: var(--primary-grad);
            color: #fff;
        }

        /* Responsive Design */
        @media (max-width: 1024px) {
            .grid-3, .price-grid, .reviews-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .flow-steps {
                grid-template-columns: repeat(2, 1fr);
                gap: 30px;
            }
            .training-card {
                flex-direction: column;
                align-items: flex-start;
                padding: 30px;
            }
            .training-info {
                max-width: 100%;
            }
        }

        @media (max-width: 768px) {
            .menu-toggle {
                display: flex;
            }

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

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

            .hero-title {
                font-size: 2.25rem;
            }

            .grid-2, .grid-3, .cases-grid, .price-grid, .reviews-grid, .contact-layout {
                grid-template-columns: 1fr;
            }

            .form-grid {
                grid-template-columns: 1fr;
            }

            .form-group-full {
                grid-column: span 1;
            }

            .footer-grid {
                grid-template-columns: 1fr;
            }
            
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 480px) {
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .flow-steps {
                grid-template-columns: 1fr;
            }
        }

        /* Animation utilities */
        @keyframes pulse {
            0% { transform: scale(1); opacity: 1; }
            50% { transform: scale(1.05); opacity: 0.9; }
            100% { transform: scale(1); opacity: 1; }
        }