:root {
            --primary-neon: #00ff87; /* 荧光绿 */
            --secondary-neon: #60efff; /* 荧光蓝 */
            --accent-neon: #ff007f; /* 霓虹粉 */
            --bg-color: #f6f9fc; /* 浅灰色背景 */
            --text-main: #0f172a; /* 深灰正文 */
            --text-muted: #475569; /* 次要文字 */
            --card-bg: #ffffff; /* 卡片白背景 */
            --border-color: #e2e8f0;
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            font-family: var(--font-family);
            color: var(--text-main);
            background-color: var(--bg-color);
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: all 0.3s ease;
        }

        /* 布局容器 */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 顶部导航 */
        header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 4px 20px rgba(0, 255, 135, 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;
        }

        .logo-text {
            font-size: 1.25rem;
            font-weight: 800;
            letter-spacing: 1px;
            background: linear-gradient(135deg, #0f172a 30%, #00ff87 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        nav {
            display: flex;
            gap: 20px;
            align-items: center;
        }

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

        .nav-link:hover {
            color: var(--text-main);
            text-shadow: 0 0 10px rgba(0, 255, 135, 0.3);
        }

        .nav-btn {
            background: linear-gradient(135deg, var(--primary-neon), var(--secondary-neon));
            color: #0f172a;
            padding: 8px 18px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.9rem;
            border: 1px solid rgba(0, 0, 0, 0.1);
        }

        .nav-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 15px rgba(0, 255, 135, 0.3);
        }

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

        /* Hero 首屏 - 炫彩荧光风 - 无图片 */
        .hero {
            padding: 100px 0 80px 0;
            background: radial-gradient(circle at 80% 20%, rgba(96, 239, 255, 0.15), transparent 40%),
                        radial-gradient(circle at 20% 80%, rgba(0, 255, 135, 0.15), transparent 40%),
                        #ffffff;
            border-bottom: 1px solid var(--border-color);
            position: relative;
            overflow: hidden;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            background: rgba(0, 255, 135, 0.1);
            border: 1px solid rgba(0, 255, 135, 0.3);
            border-radius: 20px;
            color: #00aa5b;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 20px;
        }

        .hero-title {
            font-size: 3rem;
            line-height: 1.25;
            font-weight: 900;
            color: var(--text-main);
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }

        .hero-title span {
            position: relative;
            z-index: 1;
        }

        .hero-title span::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 0;
            width: 100%;
            height: 8px;
            background: linear-gradient(90deg, var(--primary-neon), var(--secondary-neon));
            z-index: -1;
            opacity: 0.8;
        }

        .hero-desc {
            font-size: 1.15rem;
            color: var(--text-muted);
            max-width: 750px;
            margin-bottom: 40px;
        }

        .hero-btns {
            display: flex;
            gap: 15px;
            flex-wrap: wrap;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary-neon), var(--secondary-neon));
            color: #0f172a;
            padding: 14px 32px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 1.05rem;
            border: 1px solid rgba(0,0,0,0.1);
            box-shadow: 0 4px 20px rgba(0, 255, 135, 0.25);
            transition: all 0.3s;
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 25px rgba(0, 255, 135, 0.4);
        }

        .btn-secondary {
            background: #ffffff;
            color: var(--text-main);
            padding: 14px 32px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 1.05rem;
            border: 2px solid var(--text-main);
            transition: all 0.3s;
        }

        .btn-secondary:hover {
            transform: translateY(-3px);
            background: var(--text-main);
            color: #ffffff;
        }

        /* 标签云组件 */
        .tag-cloud-wrapper {
            margin-top: 50px;
            border-top: 1px solid rgba(0,0,0,0.05);
            padding-top: 30px;
        }

        .tag-cloud-title {
            font-size: 0.85rem;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            color: var(--text-muted);
            margin-bottom: 15px;
            font-weight: 600;
        }

        .tags-container {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .tag-item {
            padding: 4px 12px;
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 15px;
            font-size: 0.8rem;
            color: var(--text-muted);
            transition: all 0.2s;
        }

        .tag-item:hover {
            border-color: var(--primary-neon);
            color: var(--text-main);
            box-shadow: 0 2px 10px rgba(0, 255, 135, 0.15);
        }

        /* 全局Section标题 */
        .section-title-area {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-subtitle {
            font-size: 0.9rem;
            font-weight: 700;
            color: #00aa5b;
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 10px;
            display: block;
        }

        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-main);
        }

        .section-title span {
            background: linear-gradient(90deg, #00b4d8, #00f5d4);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

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

        .bg-white {
            background-color: #ffffff;
        }

        /* 数据指标卡片 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
        }

        .stat-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 30px;
            text-align: center;
            transition: all 0.3s;
            position: relative;
            overflow: hidden;
        }

        .stat-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: linear-gradient(to bottom, var(--primary-neon), var(--secondary-neon));
        }

        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
            border-color: var(--primary-neon);
        }

        .stat-num {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 10px;
            background: linear-gradient(135deg, var(--text-main), #00aa5b);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .stat-label {
            font-size: 0.95rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* 服务能力卡片 */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
        }

        .service-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 20px;
            padding: 40px 30px;
            transition: all 0.3s;
        }

        .service-card:hover {
            transform: translateY(-5px);
            border-color: var(--secondary-neon);
            box-shadow: 0 12px 30px rgba(96, 239, 255, 0.15);
        }

        .service-icon {
            width: 50px;
            height: 50px;
            border-radius: 12px;
            background: rgba(96, 239, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 25px;
            font-size: 1.5rem;
            color: #00aa5b;
            border: 1px solid rgba(96, 239, 255, 0.3);
        }

        .service-card h3 {
            font-size: 1.3rem;
            font-weight: 750;
            margin-bottom: 15px;
        }

        .service-card p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 流程步骤 */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 30px;
            position: relative;
        }

        .step-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            padding: 30px;
            border-radius: 16px;
            position: relative;
            transition: all 0.3s;
        }

        .step-card:hover {
            border-color: var(--primary-neon);
            box-shadow: 0 10px 25px rgba(0, 255, 135, 0.1);
        }

        .step-num {
            position: absolute;
            top: 20px;
            right: 20px;
            font-size: 3rem;
            font-weight: 900;
            line-height: 1;
            color: rgba(0, 255, 135, 0.15);
        }

        .step-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
            position: relative;
            z-index: 2;
        }

        .step-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            position: relative;
            z-index: 2;
        }

        /* 对比评测板块 */
        .rating-box {
            background: linear-gradient(135deg, rgba(0, 255, 135, 0.05), rgba(96, 239, 255, 0.05));
            border: 1px solid var(--primary-neon);
            border-radius: 20px;
            padding: 40px;
            text-align: center;
            margin-bottom: 40px;
        }

        .rating-score {
            font-size: 4rem;
            font-weight: 900;
            line-height: 1;
            color: var(--text-main);
            margin-bottom: 10px;
        }

        .rating-stars {
            font-size: 1.8rem;
            color: #ffb703;
            margin-bottom: 15px;
        }

        .table-responsive {
            width: 100%;
            overflow-x: auto;
            border: 1px solid var(--border-color);
            border-radius: 16px;
            background: #ffffff;
        }

        table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            font-size: 0.95rem;
            min-width: 700px;
        }

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

        th {
            background-color: #f8fafc;
            font-weight: 700;
            color: var(--text-main);
        }

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

        .highlight-col {
            background-color: rgba(0, 255, 135, 0.05);
            font-weight: 600;
        }

        /* 案例展示区 */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }

        .case-card {
            background: #ffffff;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: all 0.3s ease;
        }

        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(0,0,0,0.08);
            border-color: var(--primary-neon);
        }

        .case-img-container {
            position: relative;
            width: 100%;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: #e2e8f0;
        }

        .case-img-container img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

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

        .case-content {
            padding: 25px;
        }

        .case-tag {
            display: inline-block;
            padding: 3px 10px;
            background: rgba(0, 255, 135, 0.1);
            color: #00aa5b;
            font-size: 0.75rem;
            border-radius: 4px;
            font-weight: 600;
            margin-bottom: 12px;
        }

        .case-content h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

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

        /* 需求提交表单 */
        .form-section {
            background: radial-gradient(circle at 10% 10%, rgba(96, 239, 255, 0.1), transparent 30%), #ffffff;
        }

        .form-container {
            max-width: 650px;
            margin: 0 auto;
            background: #ffffff;
            border: 1px solid var(--border-color);
            padding: 40px;
            border-radius: 24px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.03);
        }

        .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: 1px solid var(--border-color);
            border-radius: 8px;
            font-size: 0.95rem;
            color: var(--text-main);
            background-color: #f8fafc;
            transition: all 0.3s;
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary-neon);
            background-color: #ffffff;
            box-shadow: 0 0 0 3px rgba(0, 255, 135, 0.15);
        }

        textarea.form-control {
            resize: vertical;
            min-height: 100px;
        }

        .form-btn {
            width: 100%;
            background: linear-gradient(135deg, var(--primary-neon), var(--secondary-neon));
            color: #0f172a;
            border: 1px solid rgba(0,0,0,0.1);
            padding: 14px;
            font-size: 1rem;
            font-weight: 700;
            border-radius: 8px;
            cursor: pointer;
            box-shadow: 0 4px 15px rgba(0, 255, 135, 0.2);
            transition: all 0.3s;
        }

        .form-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 255, 135, 0.35);
        }

        /* FAQ折叠面板 */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            margin-bottom: 15px;
            overflow: hidden;
            transition: all 0.3s;
        }

        .faq-item:hover {
            border-color: var(--secondary-neon);
        }

        .faq-header {
            padding: 20px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--text-main);
            user-select: none;
        }

        .faq-icon {
            font-size: 1.2rem;
            transition: transform 0.3s ease;
            color: var(--text-muted);
        }

        .faq-content {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: all 0.3s ease-out;
            color: var(--text-muted);
            font-size: 0.95rem;
            border-top: 0 solid transparent;
        }

        .faq-item.active .faq-content {
            padding: 20px 24px;
            max-height: 500px;
            border-top: 1px solid var(--border-color);
        }

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

        /* 用户评论区 */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
        }

        .review-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 30px;
            position: relative;
            transition: all 0.3s;
        }

        .review-card:hover {
            border-color: var(--primary-neon);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
        }

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

        .avatar-placeholder {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary-neon), var(--secondary-neon));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: #0f172a;
        }

        .reviewer-info h4 {
            font-size: 1rem;
            font-weight: 700;
        }

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

        .review-text {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 资讯与知识库列表 */
        .articles-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
        }

        .article-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 20px;
            transition: all 0.3s;
        }

        .article-card:hover {
            border-color: var(--secondary-neon);
            transform: translateY(-3px);
        }

        .article-card h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .article-link {
            font-size: 0.85rem;
            color: #00aa5b;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .article-link:hover {
            color: var(--text-main);
        }

        /* 合作伙伴 & 技术标准 */
        .tech-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            max-width: 900px;
            margin: 0 auto;
        }

        .tech-tag {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 30px;
            padding: 8px 20px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-main);
            transition: all 0.2s;
        }

        .tech-tag:hover {
            background: var(--text-main);
            color: #ffffff;
            border-color: var(--text-main);
        }

        /* 浮动客服工具栏 */
        .floating-service {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

        .float-btn:hover {
            background: linear-gradient(135deg, var(--primary-neon), var(--secondary-neon));
            transform: scale(1.1);
        }

        .float-btn svg {
            width: 22px;
            height: 22px;
            fill: var(--text-main);
        }

        .float-qr-panel {
            position: absolute;
            bottom: 60px;
            right: 0;
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 15px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.15);
            display: none;
            width: 160px;
            text-align: center;
        }

        .float-qr-panel img {
            width: 100%;
            height: auto;
            border-radius: 8px;
            margin-bottom: 8px;
        }

        .float-qr-panel p {
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--text-main);
        }

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

        /* 页脚 */
        footer {
            background-color: #0f172a;
            color: #94a3b8;
            padding: 60px 0 30px 0;
            font-size: 0.9rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

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

        .footer-logo-desc .ai-page-logo {
            
            max-width: 140px;
        }

        .footer-title {
            color: #ffffff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 20px;
            position: relative;
        }

        .footer-title::after {
            content: '';
            position: absolute;
            bottom: -6px;
            left: 0;
            width: 30px;
            height: 2px;
            background: var(--primary-neon);
        }

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

        .footer-links a:hover {
            color: var(--primary-neon);
            padding-left: 5px;
        }

        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }

        .footer-friendships {
            width: 100%;
            border-top: 1px solid #1e293b;
            padding-top: 20px;
            margin-top: 20px;
            font-size: 0.8rem;
        }

        .footer-friendships-title {
            color: #ffffff;
            margin-bottom: 10px;
            font-weight: 600;
        }

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

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

        .footer-friendships-links a:hover {
            color: var(--secondary-neon);
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .menu-toggle {
                display: block;
            }

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

            nav.show {
                display: flex;
            }

            .hero-title {
                font-size: 2.2rem;
            }

            .section-title {
                font-size: 1.8rem;
            }

            .rating-box {
                padding: 25px;
            }

            .form-container {
                padding: 25px 20px;
            }
        }