/* CSS Reset & Variables */
        :root {
            --primary: #2563eb;       /* 科技宝蓝 */
            --accent: #f97316;        /* 活力亮橙 */
            --highlight: #10b981;     /* 极客青绿 */
            --bg-main: #f8fafc;       /* 浅底灰 */
            --bg-card: #ffffff;       /* 纯白卡片 */
            --text-main: #0f172a;     /* 深slate正文 */
            --text-muted: #475569;    /* 灰slate */
            --border-color: #e2e8f0;  /* 边框灰 */
            --max-width: 1200px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            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(--bg-main);
        }

        body {
            line-height: 1.6;
            overflow-x: hidden;
        }

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

        ul {
            list-style: none;
        }

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

        /* Common Layout Grid */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }

        .section-padding {
            padding: 80px 0;
        }

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

        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-main);
            position: relative;
            display: inline-block;
            margin-bottom: 15px;
        }

        .section-header h2::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 2px;
        }

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

        /* Buttons & Badges */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 8px;
            cursor: pointer;
            transition: var(--transition);
            border: none;
        }

        .btn-primary {
            background-color: var(--primary);
            color: #ffffff;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
            background-color: #1d4ed8;
        }

        .btn-accent {
            background-color: var(--accent);
            color: #ffffff;
            box-shadow: 0 4px 14px rgba(249, 115, 22, 0.3);
        }

        .btn-accent:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(249, 115, 22, 0.4);
            background-color: #ea580c;
        }

        .btn-outline {
            background-color: transparent;
            border: 2px solid var(--primary);
            color: var(--primary);
        }

        .btn-outline:hover {
            background-color: var(--primary);
            color: #ffffff;
        }

        /* Header Navigation */
        .site-header {
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .nav-container {
            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: 1.3rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .nav-menu {
            display: flex;
        }

        .nav-link {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-muted);
            padding: 8px 12px;
            border-radius: 6px;
        }

        .nav-link:hover {
            color: var(--primary);
            background-color: rgba(37, 99, 235, 0.05);
        }

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

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

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

        /* Hero Section (No Image Allowed) */
        .hero-section {
            position: relative;
            background: radial-gradient(circle at 80% 20%, rgba(37, 99, 235, 0.08) 0%, transparent 50%),
                        radial-gradient(circle at 10% 80%, rgba(249, 115, 22, 0.08) 0%, transparent 50%),
                        var(--bg-card);
            padding: 100px 0 80px 0;
            overflow: hidden;
            border-bottom: 1px solid var(--border-color);
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
            align-items: center;
        }

        .hero-content h1 {
            font-size: 2.8rem;
            line-height: 1.25;
            font-weight: 900;
            margin-bottom: 20px;
            color: var(--text-main);
        }

        .hero-content h1 span {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            font-size: 1.2rem;
            color: var(--text-muted);
            margin-bottom: 35px;
            max-width: 600px;
        }

        .hero-btn-group {
            display: flex;
            gap: 15px;
            margin-bottom: 40px;
            flex-wrap: wrap;
        }

        .hero-badge-group {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }

        .hero-badge-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        .hero-badge-item svg {
            color: var(--highlight);
        }

        /* Hero Right: Tech Cards Container */
        .hero-visual-card {
            background-color: var(--bg-main);
            border: 2px solid var(--border-color);
            border-radius: 16px;
            padding: 30px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.03);
            position: relative;
        }

        .hero-visual-card::before {
            content: '';
            position: absolute;
            top: -2px;
            left: -2px;
            right: -2px;
            bottom: -2px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            z-index: -1;
            border-radius: 18px;
            opacity: 0.4;
        }

        .card-stat-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

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

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

        .stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            font-weight: 600;
        }

        /* Platform Intro Section */
        .intro-section {
            background-color: var(--bg-card);
        }

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

        .intro-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .intro-card {
            background-color: var(--bg-main);
            padding: 25px;
            border-radius: 12px;
            border-left: 4px solid var(--primary);
            transition: var(--transition);
        }

        .intro-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.05);
        }

        .intro-card h3 {
            font-size: 1.1rem;
            margin-bottom: 10px;
            color: var(--text-main);
        }

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

        /* Services Grid (AIGC Platform Services) */
        .services-section {
            background-color: var(--bg-main);
        }

        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
        }

        .service-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 30px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

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

        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.06);
        }

        .service-card:hover::after {
            transform: scaleX(1);
        }

        .service-icon {
            font-size: 2rem;
            margin-bottom: 20px;
            display: inline-block;
        }

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

        .service-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-bottom: 20px;
        }

        .model-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .model-tag {
            font-size: 0.75rem;
            padding: 3px 8px;
            border-radius: 4px;
            background-color: var(--bg-main);
            color: var(--primary);
            font-weight: 600;
        }

        /* Workflow Steps */
        .workflow-section {
            background-color: var(--bg-card);
        }

        .workflow-timeline {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            position: relative;
        }

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

        .step-num {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background-color: var(--primary);
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: 800;
            margin: 0 auto 20px auto;
            box-shadow: 0 6px 15px rgba(37,99,235,0.3);
        }

        .workflow-step:nth-child(even) .step-num {
            background-color: var(--accent);
            box-shadow: 0 6px 15px rgba(249,115,22,0.3);
        }

        .workflow-step h3 {
            font-size: 1.15rem;
            margin-bottom: 10px;
        }

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

        /* Technical Standards */
        .standards-section {
            background-color: var(--bg-main);
        }

        .standards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

        .standard-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-color);
            padding: 30px;
            border-radius: 12px;
            text-align: center;
            transition: var(--transition);
        }

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

        /* Contrast / Comparison Table */
        .compare-section {
            background-color: var(--bg-card);
        }

        .table-responsive {
            width: 100%;
            overflow-x: auto;
            margin-top: 30px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 800px;
        }

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

        .compare-table th {
            background-color: var(--bg-main);
            font-weight: 700;
            color: var(--text-main);
        }

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

        .highlight-col {
            background-color: rgba(37, 99, 235, 0.03);
            font-weight: 600;
        }

        /* Cases Center with Assets */
        .cases-section {
            background-color: var(--bg-main);
        }

        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .case-card {
            background-color: var(--bg-card);
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .case-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.08);
        }

        .case-img-container {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background-color: #eaeaea;
        }

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

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

        .case-body {
            padding: 25px;
        }

        .case-tag {
            display: inline-block;
            padding: 4px 10px;
            background-color: rgba(37, 99, 235, 0.1);
            color: var(--primary);
            font-size: 0.8rem;
            border-radius: 4px;
            font-weight: 600;
            margin-bottom: 15px;
        }

        .case-body h3 {
            font-size: 1.2rem;
            margin-bottom: 10px;
            color: var(--text-main);
        }

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

        /* Token Pricing */
        .token-section {
            background-color: var(--bg-card);
        }

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

        .token-card {
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 25px;
            text-align: center;
            background-color: var(--bg-main);
            transition: var(--transition);
        }

        .token-card.popular {
            border: 2px solid var(--accent);
            background-color: var(--bg-card);
            position: relative;
        }

        .token-card.popular::before {
            content: '超值推荐';
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            background-color: var(--accent);
            color: #ffffff;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 2px 10px;
            border-radius: 20px;
        }

        .token-price {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary);
            margin: 15px 0;
        }

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

        .training-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
        }

        .training-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-color);
            padding: 25px;
            border-radius: 12px;
            text-align: center;
            transition: var(--transition);
        }

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

        .training-card h3 {
            font-size: 1.05rem;
            margin-bottom: 10px;
            color: var(--text-main);
        }

        /* Testimonials (6 Comments) */
        .testimonials-section {
            background-color: var(--bg-card);
        }

        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

        .testimonial-card {
            background-color: var(--bg-main);
            padding: 30px;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            position: relative;
        }

        .testi-text {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            font-style: italic;
        }

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

        .author-avatar {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background-color: var(--primary);
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.2rem;
        }

        .author-info h4 {
            font-size: 0.95rem;
            color: var(--text-main);
        }

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

        /* Articles & Wiki */
        .wiki-section {
            background-color: var(--bg-main);
        }

        .wiki-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
        }

        .glossary-card {
            background-color: var(--bg-card);
            border-radius: 12px;
            padding: 30px;
            border: 1px solid var(--border-color);
        }

        .glossary-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-top: 20px;
        }

        .glossary-item h4 {
            font-size: 1rem;
            color: var(--primary);
            margin-bottom: 5px;
        }

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

        .articles-card {
            background-color: var(--bg-card);
            border-radius: 12px;
            padding: 30px;
            border: 1px solid var(--border-color);
        }

        .article-list {
            margin-top: 20px;
        }

        .article-list li {
            padding: 12px 0;
            border-bottom: 1px solid var(--border-color);
        }

        .article-list li:last-child {
            border-bottom: none;
        }

        .article-list a {
            display: block;
            font-size: 0.95rem;
            color: var(--text-main);
            font-weight: 500;
        }

        .article-list a:hover {
            color: var(--primary);
            padding-left: 5px;
        }

        /* FAQ Section (Accordion) */
        .faq-section {
            background-color: var(--bg-card);
        }

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

        .faq-item {
            border-bottom: 1px solid var(--border-color);
            padding: 18px 0;
        }

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-main);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-top: 0;
        }

        .faq-answer p {
            padding-top: 10px;
        }

        .faq-icon {
            font-size: 1.2rem;
            transition: transform 0.3s ease;
        }

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

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

        /* Contact & Lead Form & Agent */
        .contact-section {
            background-color: var(--bg-main);
        }

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

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

        .contact-method {
            display: flex;
            align-items: flex-start;
            gap: 15px;
            margin-bottom: 30px;
        }

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

        .qr-box {
            margin-top: 30px;
            display: flex;
            gap: 20px;
            align-items: center;
        }

        .qr-code img {
            width: 120px;
            height: 120px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 5px;
            background-color: #fff;
        }

        .form-card {
            background-color: var(--bg-card);
            padding: 40px;
            border-radius: 16px;
            border: 1px solid var(--border-color);
        }

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

        .form-group label {
            display: block;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-main);
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1.5px solid var(--border-color);
            border-radius: 8px;
            font-size: 0.95rem;
            transition: var(--transition);
            background-color: var(--bg-main);
        }

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

        /* Footer & Partners */
        .site-footer {
            background-color: #0f172a;
            color: #94a3b8;
            padding: 60px 0 30px 0;
            border-top: 1px solid #1e293b;
        }

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

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 15px;
        }

        .footer-logo .brand-name {
            background: linear-gradient(135deg, #ffffff, var(--primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .footer-links h4 {
            color: #ffffff;
            margin-bottom: 20px;
            font-size: 1rem;
        }

        .footer-links ul {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px;
        }

        .footer-links a {
            font-size: 0.85rem;
        }

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

        .friend-links {
            border-top: 1px solid #1e293b;
            padding-top: 25px;
            margin-top: 25px;
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            align-items: center;
            font-size: 0.85rem;
        }

        .friend-links a {
            color: #64748b;
        }

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

        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.8rem;
        }

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

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

        .widget-item:hover {
            transform: scale(1.1);
        }

        .widget-item.kefu:hover .kefu-popover {
            opacity: 1;
            visibility: visible;
        }

        .kefu-popover {
            position: absolute;
            right: 60px;
            bottom: 0;
            background-color: var(--bg-card);
            border: 1px solid var(--border-color);
            padding: 15px;
            border-radius: 12px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
            width: 150px;
            text-align: center;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
        }

        .kefu-popover img {
            width: 120px;
            height: 120px;
            margin: 0 auto 8px auto;
        }

        .kefu-popover p {
            color: var(--text-main);
            font-size: 0.8rem;
            font-weight: 600;
        }

        /* Responsive Design */
        @media (max-width: 1024px) {
            .hero-grid, .intro-grid, .contact-grid {
                grid-template-columns: 1fr;
            }
            .hero-visual-card {
                max-width: 600px;
                margin: 0 auto;
            }
            .workflow-timeline {
                grid-template-columns: 1fr 1fr;
            }
            .training-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .cases-grid, .testimonials-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background-color: var(--bg-card);
                border-bottom: 1px solid var(--border-color);
                padding: 20px;
                box-shadow: 0 10px 15px rgba(0,0,0,0.05);
            }
            .nav-menu.active {
                display: flex;
            }
            .menu-toggle {
                display: flex;
            }
            .hero-content h1 {
                font-size: 2.2rem;
            }
            .training-grid {
                grid-template-columns: 1fr 1fr;
            }
            .cases-grid, .testimonials-grid, .standards-grid, .wiki-grid, .token-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }