:root {
            --primary: #4f46e5;
            --primary-hover: #4338ca;
            --accent-purple: #d946ef;
            --accent-cyan: #06b6d4;
            --accent-yellow: #eab308;
            --bg-base: #f8fafc;
            --bg-card: #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);
            --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        }

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

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

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

        /* Utility Classes */
        .section-padding {
            padding: 80px 0;
        }
        .text-center { text-align: center; }
        .badge {
            display: inline-block;
            padding: 6px 16px;
            font-size: 14px;
            font-weight: 600;
            border-radius: 50px;
            margin-bottom: 16px;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }
        .badge-cyan { background-color: rgba(6, 182, 212, 0.1); color: #0891b2; }
        .badge-purple { background-color: rgba(217, 70, 239, 0.1); color: #c026d3; }
        .badge-yellow { background-color: rgba(234, 179, 8, 0.1); color: #a16207; }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            font-size: 16px;
            font-weight: 600;
            border-radius: 8px;
            transition: all 0.3s ease;
            cursor: pointer;
            text-decoration: none;
            border: none;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--accent-purple));
            color: #ffffff;
            box-shadow: 0 4px 14px rgba(79, 70, 229, 0.4);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(79, 70, 229, 0.6);
        }
        .btn-cyan {
            background: linear-gradient(135deg, var(--accent-cyan), var(--primary));
            color: #ffffff;
            box-shadow: 0 4px 14px rgba(6, 182, 212, 0.4);
        }
        .btn-cyan:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(6, 182, 212, 0.6);
        }
        .btn-outline {
            border: 2px solid var(--primary);
            color: var(--primary);
            background: transparent;
        }
        .btn-outline:hover {
            background-color: var(--primary);
            color: #ffffff;
        }

        /* Grid Layout System */
        .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; }
        .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
        .grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

        /* Typography */
        h1, h2, h3, h4 {
            font-weight: 800;
            line-height: 1.25;
            color: var(--text-main);
        }
        h2 { font-size: 36px; margin-bottom: 20px; position: relative; }
        h3 { font-size: 22px; margin-bottom: 12px; }
        p { color: var(--text-muted); font-size: 16px; margin-bottom: 16px; }

        /* Header & Navigation */
        header {
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            position: fixed;
            width: 100%;
            top: 0;
            left: 0;
            z-index: 1000;
            transition: all 0.3s ease;
        }
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 80px;
        }
        .logo-area {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .ai-page-logo {
            height: 40px;
            width: auto;
        }
        .logo-text {
            font-size: 20px;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), var(--accent-purple));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .nav-links {
            display: flex;
            gap: 20px;
            list-style: none;
            align-items: center;
        }
        .nav-links a {
            text-decoration: none;
            color: var(--text-muted);
            font-weight: 500;
            transition: color 0.3s;
            font-size: 14px;
        }
        .nav-links a:hover, .nav-links a.active {
            color: var(--primary);
        }
        .nav-cta {
            display: flex;
            align-items: center;
            gap: 15px;
        }
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            cursor: pointer;
            color: var(--text-main);
        }

        /* Hero Section (No Image) */
        .hero-section {
            padding: 160px 0 100px 0;
            background: radial-gradient(circle at 10% 20%, rgba(217, 70, 239, 0.05) 0%, rgba(6, 182, 212, 0.05) 90.1%), var(--bg-card);
            border-bottom: 1px solid var(--border-color);
        }
        .hero-content {
            max-width: 850px;
            margin: 0 auto;
            text-align: center;
        }
        .hero-title {
            font-size: 48px;
            line-height: 1.15;
            margin-bottom: 24px;
            letter-spacing: -0.02em;
        }
        .hero-title span {
            background: linear-gradient(135deg, var(--primary) 30%, var(--accent-purple) 70%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-desc {
            font-size: 20px;
            color: var(--text-muted);
            margin-bottom: 36px;
            line-height: 1.6;
        }
        .hero-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            margin-bottom: 48px;
            flex-wrap: wrap;
        }

        /* Info Metrics (数据指标) */
        .metrics-bar {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 30px;
            box-shadow: var(--shadow-md);
            margin-top: -40px;
            position: relative;
            z-index: 10;
        }
        .metric-item {
            text-align: center;
        }
        .metric-number {
            font-size: 40px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1;
            margin-bottom: 8px;
        }
        .metric-label {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 600;
        }

        /* Card styles */
        .card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 30px;
            box-shadow: var(--shadow-sm);
            transition: all 0.3s ease;
        }
        .card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            border-color: var(--accent-purple);
        }

        /* 3. 全平台AIGC服务 */
        .service-tag-container {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-top: 30px;
        }
        .service-tag {
            background-color: var(--bg-card);
            border: 1px solid var(--border-color);
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-muted);
            box-shadow: var(--shadow-sm);
            transition: all 0.2s;
        }
        .service-tag:hover {
            background-color: var(--primary);
            color: #ffffff;
            border-color: var(--primary);
            transform: scale(1.05);
        }

        /* 4. 一站式AIGC制作 */
        .showcase-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 40px;
        }
        .showcase-card {
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }
        .showcase-icon {
            font-size: 32px;
            margin-bottom: 16px;
            color: var(--accent-purple);
        }

        /* 5. 全行业解决方案 */
        .solution-card {
            border-left: 4px solid var(--accent-cyan);
        }

        /* 7. 标准化AIGC流程 */
        .workflow-timeline {
            position: relative;
            max-width: 800px;
            margin: 40px auto 0 auto;
        }
        .workflow-step {
            position: relative;
            padding-left: 40px;
            margin-bottom: 30px;
        }
        .workflow-step::before {
            content: '';
            position: absolute;
            left: 8px;
            top: 6px;
            width: 4px;
            height: 100%;
            background-color: var(--border-color);
        }
        .workflow-step:last-child::before {
            display: none;
        }
        .workflow-step::after {
            content: '';
            position: absolute;
            left: 0;
            top: 4px;
            width: 20px;
            height: 20px;
            border-radius: 50px;
            background-color: var(--primary);
            border: 4px solid var(--bg-card);
            box-shadow: var(--shadow-sm);
        }
        .workflow-step-num {
            font-size: 14px;
            font-weight: 700;
            color: var(--accent-purple);
            margin-bottom: 4px;
        }

        /* 8. 技术标准 */
        .tech-box {
            background-color: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 20px;
            text-align: center;
        }

        /* 9. 客户案例中心 */
        .case-gallery {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 20px;
            margin-top: 40px;
        }
        .case-item {
            position: relative;
            border-radius: 16px;
            overflow: hidden;
            height: 300px;
            background-color: #000;
        }
        .case-item img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.8;
            transition: all 0.5s ease;
        }
        .case-item:hover img {
            transform: scale(1.05);
            opacity: 0.9;
        }
        .case-info {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 20px;
            background: linear-gradient(0deg, rgba(0,0,0,0.9) 0%, rgba(0,0,0,0) 100%);
            color: #ffffff;
        }
        .case-info h4 {
            color: #ffffff;
            font-size: 18px;
            margin-bottom: 4px;
        }
        .case-info p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 12px;
            margin-bottom: 0;
        }

        /* 10. 对比评测 */
        .table-responsive {
            overflow-x: auto;
            margin-top: 30px;
            border-radius: 12px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            background-color: var(--bg-card);
        }
        .compare-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 600px;
        }
        .compare-table th, .compare-table td {
            padding: 16px 24px;
            border-bottom: 1px solid var(--border-color);
        }
        .compare-table th {
            background-color: rgba(79, 70, 229, 0.05);
            color: var(--text-main);
            font-weight: 700;
        }
        .compare-table tr:last-child td {
            border-bottom: none;
        }
        .highlight-col {
            background-color: rgba(6, 182, 212, 0.03);
            font-weight: 600;
        }
        .rating-stars {
            color: var(--accent-yellow);
            font-size: 18px;
        }

        /* 11. 智能需求匹配 (表单) */
        .form-section {
            background: linear-gradient(135deg, rgba(79, 70, 229, 0.05) 0%, rgba(217, 70, 239, 0.05) 100%);
            border-radius: 24px;
            padding: 50px;
            border: 1px solid var(--border-color);
        }
        .match-form {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
            margin-top: 30px;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .form-group-full {
            grid-column: span 2;
        }
        .form-control {
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            background-color: var(--bg-card);
            font-size: 15px;
            color: var(--text-main);
            outline: none;
            transition: all 0.3s;
        }
        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
        }
        label {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
        }

        /* 12. Token比价参考 */
        .price-list {
            margin-top: 30px;
        }
        .price-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            margin-bottom: 10px;
        }
        .price-row:hover {
            border-color: var(--accent-purple);
        }

        /* 13-14. 职业技术培训 / 人工智能培训 */
        .training-card {
            border-top: 4px solid var(--primary);
        }

        /* 15. 帮助中心 */
        .help-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        /* 16. FAQ 折叠面板 */
        .faq-accordion {
            max-width: 800px;
            margin: 40px auto 0 auto;
        }
        .faq-item {
            background-color: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            margin-bottom: 12px;
            overflow: hidden;
            transition: all 0.3s;
        }
        .faq-header {
            padding: 20px 24px;
            font-weight: 600;
            font-size: 16px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
        }
        .faq-header::after {
            content: '+';
            font-size: 20px;
            color: var(--primary);
            transition: transform 0.3s;
        }
        .faq-item.active .faq-header::after {
            content: '−';
        }
        .faq-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
            background-color: rgba(248, 250, 252, 0.5);
        }
        .faq-content {
            padding: 20px 24px;
            font-size: 15px;
            color: var(--text-muted);
            border-top: 1px solid var(--border-color);
        }

        /* 17. 常见问题自助排查 */
        .self-check-flow {
            background-color: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 30px;
            margin-top: 30px;
        }

        /* 18. AI术语百科 */
        .glossary-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .glossary-item h4 {
            color: var(--primary);
            font-size: 16px;
            margin-bottom: 8px;
        }

        /* 19. 行业资讯 / 知识库 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .news-card {
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .news-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-purple);
            text-decoration: none;
            margin-top: 15px;
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }
        .news-link:hover {
            text-decoration: underline;
        }

        /* 20. 联系我们 & 21. 加盟代理 */
        .contact-info {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .info-block {
            display: flex;
            align-items: center;
            gap: 15px;
        }
        .info-icon {
            font-size: 24px;
            color: var(--primary);
            width: 40px;
            height: 40px;
            background-color: rgba(79, 70, 229, 0.05);
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
        }
        .qr-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
        }
        .qr-card img {
            width: 150px;
            height: 150px;
            object-fit: contain;
            margin-bottom: 12px;
        }

        /* 7. 用户评论 */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 40px;
        }
        .testimonial-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 24px;
            box-shadow: var(--shadow-sm);
            position: relative;
        }
        .testimonial-user {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 20px;
        }
        .user-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: var(--accent-purple);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
        }

        /* Footer */
        footer {
            background-color: var(--text-main);
            color: #ffffff;
            padding: 60px 0 30px 0;
            border-top: 1px solid #1e293b;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            font-size: 24px;
            font-weight: 800;
            margin-bottom: 16px;
            color: #fff;
        }
        .footer-title {
            color: #ffffff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 20px;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: #94a3b8;
            text-decoration: none;
            font-size: 14px;
            transition: color 0.3s;
        }
        .footer-links a:hover {
            color: #ffffff;
        }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 20px;
            padding-top: 20px;
            border-top: 1px solid #334155;
        }
        .friend-links a {
            color: #94a3b8;
            font-size: 12px;
            text-decoration: none;
            transition: color 0.3s;
        }
        .friend-links a:hover {
            color: var(--accent-cyan);
        }
        .footer-bottom {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #334155;
            font-size: 13px;
            color: #64748b;
        }

        /* Float Customer Service */
        .float-cs {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            background-color: var(--primary);
            color: #fff;
            width: 60px;
            height: 60px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            box-shadow: var(--shadow-lg);
            cursor: pointer;
            transition: all 0.3s;
        }
        .float-cs:hover {
            transform: scale(1.1);
            background-color: var(--accent-purple);
        }
        .cs-panel {
            position: fixed;
            bottom: 100px;
            right: 30px;
            width: 280px;
            background-color: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            box-shadow: var(--shadow-lg);
            padding: 20px;
            display: none;
            z-index: 999;
        }
        .cs-panel.show {
            display: block;
        }

        /* Responsive Breakpoints */
        @media (max-width: 1024px) {
            .grid-3 { grid-template-columns: repeat(2, 1fr); }
            .grid-4 { grid-template-columns: repeat(2, 1fr); }
            .showcase-grid { grid-template-columns: repeat(2, 1fr); }
            .case-gallery { grid-template-columns: repeat(2, 1fr); }
            .testimonial-grid { grid-template-columns: repeat(2, 1fr); }
            .news-grid { grid-template-columns: repeat(2, 1fr); }
        }

        @media (max-width: 768px) {
            .grid-2, .grid-3, .grid-4, .showcase-grid, .case-gallery, .testimonial-grid, .news-grid, .help-grid, .glossary-grid {
                grid-template-columns: 1fr;
            }
            .hero-title { font-size: 32px; }
            .hero-desc { font-size: 16px; }
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 80px;
                left: 0;
                width: 100%;
                background-color: var(--bg-card);
                border-bottom: 1px solid var(--border-color);
                padding: 20px;
                box-shadow: var(--shadow-md);
            }
            .nav-links.active {
                display: flex;
            }
            .mobile-menu-btn {
                display: block;
            }
            .match-form {
                grid-template-columns: 1fr;
            }
            .form-group-full {
                grid-column: span 1;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }