:root {
            --primary: #FF5A00;
            --primary-hover: #e04f00;
            --secondary: #00E1D9;
            --dark-blue: #0F172A;
            --text-main: #334155;
            --bg-light: #F8FAFC;
            --bg-card: #FFFFFF;
            --border-color: #E2E8F0;
            --accent: #4F46E5;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
            background-color: var(--bg-light);
            color: var(--text-main);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* 统一外层容器 */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        section {
            padding: 80px 0;
            border-bottom: 1px solid var(--border-color);
        }

        .section-title {
            text-align: center;
            font-size: 2rem;
            color: var(--dark-blue);
            margin-bottom: 15px;
            font-weight: 800;
        }

        .section-subtitle {
            text-align: center;
            color: #64748B;
            max-width: 700px;
            margin: 0 auto 50px;
            font-size: 1.1rem;
        }

        /* 顶部导航 */
        header {
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(8px);
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
        }

        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
        }

        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
        }

        .ai-page-logo {
            height: 40px;
            width: auto;
        }

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

        .nav-links {
            display: flex;
            gap: 20px;
            list-style: none;
        }

        .nav-links a {
            text-decoration: none;
            color: #475569;
            font-weight: 500;
            font-size: 0.95rem;
            transition: color 0.3s;
        }

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

        .nav-actions {
            display: flex;
            gap: 12px;
            align-items: center;
        }

        .btn-outline {
            border: 1.5px solid var(--primary);
            color: var(--primary);
            padding: 8px 16px;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all 0.3s;
        }

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

        .btn-primary {
            background-color: var(--primary);
            color: white;
            padding: 9px 18px;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 600;
            font-size: 0.9rem;
            transition: background 0.3s;
            border: none;
            cursor: pointer;
        }

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

        /* 移动端菜单按钮 */
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--dark-blue);
        }

        /* 首屏 Hero (无图) */
        .hero {
            padding-top: 140px;
            padding-bottom: 90px;
            background: radial-gradient(circle at 90% 10%, rgba(255, 90, 0, 0.05) 0%, transparent 40%),
                        radial-gradient(circle at 10% 90%, rgba(79, 70, 229, 0.05) 0%, transparent 40%),
                        var(--bg-light);
            text-align: center;
            position: relative;
        }

        .hero-badge {
            display: inline-block;
            background-color: rgba(255, 90, 0, 0.1);
            color: var(--primary);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 25px;
            border: 1px solid rgba(255, 90, 0, 0.2);
        }

        .hero h1 {
            font-size: 2.8rem;
            color: var(--dark-blue);
            line-height: 1.25;
            margin-bottom: 20px;
            font-weight: 800;
            letter-spacing: -0.5px;
        }

        .hero-desc {
            font-size: 1.2rem;
            color: #475569;
            max-width: 800px;
            margin: 0 auto 35px;
        }

        .hero-btns {
            display: flex;
            justify-content: center;
            gap: 15px;
            margin-bottom: 50px;
        }

        .hero-btns .btn-primary {
            padding: 12px 30px;
            font-size: 1.05rem;
        }

        .hero-btns .btn-outline {
            padding: 12px 30px;
            font-size: 1.05rem;
        }

        /* 首屏数据指标卡片 */
        .hero-stats {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin-top: 20px;
        }

        .stat-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            padding: 25px;
            border-radius: 12px;
            box-shadow: 0 4px 6px -1px rgba(0,0,0,0.02);
            transition: transform 0.3s;
        }

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

        .stat-val {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 5px;
        }

        .stat-lbl {
            font-size: 0.9rem;
            color: #64748B;
            font-weight: 500;
        }

        /* 关于我们 & 软件介绍 */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .about-text h3 {
            font-size: 1.8rem;
            color: var(--dark-blue);
            margin-bottom: 20px;
            font-weight: 700;
        }

        .about-text p {
            margin-bottom: 20px;
            color: #475569;
            font-size: 1.05rem;
        }

        .about-features {
            list-style: none;
        }

        .about-features li {
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 500;
            color: var(--dark-blue);
        }

        .about-features li::before {
            content: "✓";
            color: var(--primary);
            font-weight: 800;
        }

        /* 平台服务体系 (支持模型展示) */
        .model-badges-wrap {
            background-color: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 40px;
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.02);
        }

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

        .model-tag {
            background: var(--bg-light);
            border: 1px solid var(--border-color);
            padding: 8px 18px;
            border-radius: 8px;
            font-weight: 500;
            font-size: 0.9rem;
            color: var(--dark-blue);
            transition: all 0.3s;
        }

        .model-tag:hover {
            background: var(--primary);
            color: white;
            border-color: var(--primary);
            transform: scale(1.05);
        }

        .model-tag.highlight {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(255, 90, 0, 0.05);
        }

        /* 全自动制作流程 & 标准服务 */
        .process-flow {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 30px;
            position: relative;
        }

        .process-step {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            padding: 30px;
            border-radius: 12px;
            position: relative;
            transition: all 0.3s;
        }

        .process-step:hover {
            box-shadow: 0 12px 20px rgba(0, 0, 0, 0.05);
            border-color: var(--primary);
        }

        .step-num {
            position: absolute;
            top: 20px;
            right: 20px;
            font-size: 2.5rem;
            font-weight: 900;
            color: rgba(255, 90, 0, 0.1);
        }

        .step-title {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--dark-blue);
            margin-bottom: 12px;
            margin-top: 10px;
        }

        .step-desc {
            font-size: 0.95rem;
            color: #64748B;
        }

        /* 解决方案 & 技术标准 */
        .grid-3col {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }

        .solution-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            transition: all 0.3s;
        }

        .solution-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.05);
        }

        .solution-icon {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 20px;
        }

        .solution-title {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--dark-blue);
            margin-bottom: 12px;
        }

        /* 全国服务网络 */
        .network-section {
            background: radial-gradient(circle at center, rgba(255, 90, 0, 0.03) 0%, transparent 70%);
        }

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

        /* 客户案例中心 */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

        .case-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 4px 6px -1px rgba(0,0,0,0.02);
            transition: transform 0.3s;
        }

        .case-item:hover {
            transform: translateY(-5px);
        }

        .case-img-container {
            width: 100%;
            height: 250px;
            overflow: hidden;
            background: #e2e8f0;
            display: flex;
            align-items: center;
            justify-content: center;
        }

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

        .case-info {
            padding: 25px;
        }

        .case-tag {
            display: inline-block;
            background: rgba(255, 90, 0, 0.08);
            color: var(--primary);
            padding: 4px 10px;
            border-radius: 4px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 12px;
        }

        .case-title {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--dark-blue);
            margin-bottom: 10px;
        }

        .case-desc {
            font-size: 0.95rem;
            color: #64748B;
        }

        /* 对比评测 */
        .rating-box {
            background: linear-gradient(135deg, var(--dark-blue), #1e293b);
            color: white;
            border-radius: 16px;
            padding: 40px;
            text-align: center;
            margin-bottom: 40px;
        }

        .rating-stars {
            font-size: 2.2rem;
            color: #FBBF24;
            margin-bottom: 10px;
        }

        .rating-num {
            font-size: 3.5rem;
            font-weight: 900;
            color: white;
            line-height: 1;
        }

        .rating-scale {
            font-size: 1.2rem;
            color: #94a3b8;
        }

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

        .compare-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 600px;
        }

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

        .compare-table th {
            background-color: #F1F5F9;
            color: var(--dark-blue);
            font-weight: 700;
        }

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

        .compare-table td.highlight-cell {
            background-color: rgba(255, 90, 0, 0.02);
            font-weight: 600;
            color: var(--primary);
        }

        /* Token 比价 */
        .token-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
        }

        .token-card {
            background: var(--bg-card);
            border: 1.5px solid var(--border-color);
            border-radius: 12px;
            padding: 25px;
            transition: all 0.3s;
            text-align: center;
        }

        .token-card.best-deal {
            border-color: var(--primary);
            position: relative;
            transform: scale(1.03);
        }

        .token-card.best-deal::before {
            content: "超低特惠";
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--primary);
            color: white;
            padding: 2px 12px;
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 20px;
        }

        .token-price {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--dark-blue);
            margin: 15px 0;
        }

        .token-price span {
            font-size: 1rem;
            font-weight: 400;
            color: #64748B;
        }

        /* 培训教育 */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
        }

        .training-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 25px;
            text-align: center;
            transition: all 0.3s;
        }

        .training-card:hover {
            border-color: var(--primary);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.04);
        }

        .training-badge {
            background: rgba(79, 70, 229, 0.08);
            color: var(--accent);
            padding: 4px 12px;
            border-radius: 4px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 15px;
            display: inline-block;
        }

        .training-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--dark-blue);
            margin-bottom: 10px;
        }

        /* 用户评论 */
        .comment-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .comment-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            box-shadow: 0 4px 6px -1px rgba(0,0,0,0.01);
        }

        .comment-user {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-bottom: 15px;
        }

        .user-avatar {
            width: 48px;
            height: 48px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: bold;
        }

        .user-meta h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--dark-blue);
        }

        .user-meta span {
            font-size: 0.8rem;
            color: #64748B;
        }

        .comment-text {
            font-size: 0.95rem;
            color: #475569;
        }

        /* 帮助中心 & FAQ */
        .faq-wrap {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            margin-bottom: 15px;
            overflow: hidden;
        }

        .faq-question {
            padding: 20px;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--dark-blue);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out, padding 0.3s ease-out;
            padding: 0 20px;
            color: #475569;
            font-size: 0.95rem;
            border-top: 0px solid var(--border-color);
        }

        .faq-item.active .faq-answer {
            max-height: 200px;
            padding: 20px;
            border-top-width: 1px;
        }

        .faq-item.active .faq-question::after {
            content: "−";
        }

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

        /* 自助排查 & 百科 */
        .troubleshoot-box {
            background: #FFF7ED;
            border: 1px solid #FFEDD5;
            border-radius: 12px;
            padding: 30px;
            margin-top: 40px;
        }

        /* 资讯 / 知识库 */
        .news-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
        }

        .news-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 25px;
            transition: all 0.3s;
        }

        .news-card:hover {
            border-color: var(--primary);
        }

        .news-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--dark-blue);
            margin-bottom: 12px;
        }

        .news-link {
            color: var(--accent);
            text-decoration: none;
            font-weight: 600;
            font-size: 0.9rem;
            display: inline-block;
            margin-top: 15px;
        }

        /* 联系我们与表单 */
        .contact-layout {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 50px;
        }

        .form-wrap {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            padding: 40px;
            border-radius: 16px;
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.02);
        }

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

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

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            font-size: 0.95rem;
            outline: none;
            transition: border-color 0.3s;
        }

        .form-control:focus {
            border-color: var(--primary);
        }

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

        .contact-info-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            padding: 25px;
            border-radius: 12px;
        }

        .kefu-qrcode-wrap {
            text-align: center;
            margin-top: 15px;
        }

        .kefu-qrcode-wrap img {
            width: 140px;
            height: 140px;
            border: 1px solid var(--border-color);
            padding: 5px;
            border-radius: 8px;
        }

        /* 页脚 */
        footer {
            background-color: var(--dark-blue);
            color: #94A3B8;
            padding: 60px 0 30px;
            font-size: 0.9rem;
            border-top: none;
        }

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

        .footer-logo-desc {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .footer-links-title {
            color: white;
            font-weight: 700;
            margin-bottom: 20px;
            font-size: 1rem;
        }

        .footer-links-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-links-list a {
            color: #94A3B8;
            text-decoration: none;
            transition: color 0.3s;
        }

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

        .footer-bottom {
            border-top: 1px solid #1E293B;
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
        }

        .friendly-links {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
        }

        .friendly-links a {
            color: #64748B;
            text-decoration: none;
            transition: color 0.3s;
        }

        .friendly-links a:hover {
            color: white;
        }

        /* 悬浮客服 */
        .sticky-kefu {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            background: white;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 15px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
            text-align: center;
            width: 120px;
            display: none;
        }

        .sticky-kefu.active {
            display: block;
        }

        .sticky-kefu img {
            width: 90px;
            height: 90px;
            margin-bottom: 8px;
        }

        .sticky-kefu-txt {
            font-size: 0.75rem;
            color: var(--dark-blue);
            font-weight: 600;
        }

        /* 响应式样式适配 */
        @media (max-width: 1024px) {
            .comment-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .contact-layout {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background: white;
                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;
            }

            .mobile-menu-btn {
                display: block;
            }

            .hero h1 {
                font-size: 2.1rem;
            }

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

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

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

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

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

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }