:root {
            --primary: #00a896;
            --primary-dark: #028090;
            --primary-light: #f0fdfa;
            --dark: #2d3748;
            --gray-light: #f4f9f9;
            --gray-border: #e2e8f0;
            --text-dark: #1a202c;
            --text-muted: #718096;
            --white: #ffffff;
            --accent: #05c46b;
            --transition: all 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
            background-color: var(--gray-light);
            color: var(--text-dark);
            line-height: 1.6;
        }

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

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

        /* 顶部导航 */
        header {
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--gray-border);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .nav-container {
            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;
        }

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

        .nav-menu a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-dark);
        }

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

        .nav-btn {
            background-color: var(--primary);
            color: var(--white) !important;
            padding: 8px 18px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: bold;
            box-shadow: 0 4px 6px rgba(0, 168, 150, 0.2);
        }

        .nav-btn:hover {
            background-color: var(--primary-dark);
            transform: translateY(-2px);
        }

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

        .menu-toggle span {
            width: 25px;
            height: 3px;
            background-color: var(--dark);
            border-radius: 2px;
            transition: var(--transition);
        }

        /* 首屏 Hero */
        .hero {
            background: linear-gradient(135deg, #eefdf9 0%, #e6f6f7 100%);
            padding: 100px 0 80px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(0, 168, 150, 0.05) 0%, transparent 60%);
            pointer-events: none;
        }

        .badge-promo {
            display: inline-block;
            background-color: rgba(0, 168, 150, 0.1);
            color: var(--primary-dark);
            padding: 6px 16px;
            border-radius: 30px;
            font-size: 14px;
            font-weight: bold;
            margin-bottom: 20px;
            border: 1px solid rgba(0, 168, 150, 0.2);
            animation: pulse 2s infinite;
        }

        h1.hero-title {
            font-size: 2.5rem;
            line-height: 1.25;
            color: var(--dark);
            font-weight: 800;
            max-width: 900px;
            margin: 0 auto 20px;
        }

        .hero-desc {
            font-size: 1.15rem;
            color: var(--text-muted);
            max-width: 700px;
            margin: 0 auto 35px;
        }

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

        .btn-primary {
            background-color: var(--primary);
            color: var(--white);
            padding: 14px 32px;
            border-radius: 8px;
            font-weight: bold;
            font-size: 16px;
            box-shadow: 0 4px 15px rgba(0, 168, 150, 0.3);
            border: none;
            cursor: pointer;
        }

        .btn-primary:hover {
            background-color: var(--primary-dark);
            transform: translateY(-2px);
        }

        .btn-secondary {
            background-color: var(--white);
            color: var(--primary-dark);
            border: 1px solid var(--primary);
            padding: 14px 32px;
            border-radius: 8px;
            font-weight: bold;
            font-size: 16px;
        }

        .btn-secondary:hover {
            background-color: var(--primary-light);
            transform: translateY(-2px);
        }

        /* 核心优势数据指标 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 60px;
        }

        .stat-card {
            background: var(--white);
            border: 1px solid var(--gray-border);
            border-radius: 12px;
            padding: 24px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.02);
            transition: var(--transition);
        }

        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0, 168, 150, 0.08);
            border-color: var(--primary);
        }

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

        .stat-label {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: bold;
        }

        /* 通用区块样式 */
        section {
            padding: 80px 0;
            border-bottom: 1px solid var(--gray-border);
        }

        .section-light {
            background-color: var(--white);
        }

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

        .section-header h2 {
            font-size: 2rem;
            color: var(--dark);
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
        }

        .section-header h2::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            width: 50px;
            height: 3px;
            background-color: var(--primary);
            border-radius: 2px;
        }

        .section-header p {
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
        }

        /* 服务能力卡片 */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .service-card {
            background-color: var(--gray-light);
            border-radius: 12px;
            padding: 30px;
            transition: var(--transition);
            border: 1px solid transparent;
        }

        .service-card:hover {
            background-color: var(--white);
            border-color: var(--primary);
            box-shadow: 0 10px 25px rgba(0, 168, 150, 0.06);
            transform: translateY(-5px);
        }

        .service-icon {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: 20px;
        }

        .service-card h3 {
            font-size: 18px;
            color: var(--dark);
            margin-bottom: 12px;
        }

        .service-card p {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* 模型聚合展示 */
        .model-cloud {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            max-width: 1000px;
            margin: 0 auto;
        }

        .model-tag {
            background-color: var(--white);
            border: 1px solid var(--gray-border);
            padding: 8px 18px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 500;
            color: var(--dark);
            transition: var(--transition);
        }

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

        /* 制作场景与工作流 */
        .workflow-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .step-item {
            background: var(--white);
            border: 1px solid var(--gray-border);
            padding: 30px 20px;
            border-radius: 12px;
            text-align: center;
            position: relative;
            z-index: 2;
        }

        .step-num {
            width: 40px;
            height: 40px;
            background-color: var(--primary);
            color: var(--white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            margin: 0 auto 20px;
        }

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

        .case-card {
            background: var(--white);
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid var(--gray-border);
            transition: var(--transition);
        }

        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 25px rgba(0,0,0,0.08);
        }

        .case-img-container {
            width: 100%;
            height: 200px;
            overflow: hidden;
            background-color: var(--gray-light);
        }

        .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-info {
            padding: 20px;
        }

        .case-tag {
            display: inline-block;
            background-color: var(--primary-light);
            color: var(--primary-dark);
            font-size: 12px;
            padding: 3px 10px;
            border-radius: 4px;
            margin-bottom: 10px;
            font-weight: bold;
        }

        .case-title {
            font-size: 16px;
            color: var(--dark);
            font-weight: bold;
            margin-bottom: 8px;
        }

        .case-desc {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* 对比评测表格与评测卡片 */
        .review-panel {
            background: var(--primary-light);
            border-radius: 16px;
            padding: 40px;
            margin-bottom: 40px;
            border: 1px dashed var(--primary);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 30px;
        }

        .review-left h3 {
            font-size: 24px;
            color: var(--primary-dark);
            margin-bottom: 10px;
        }

        .review-stars {
            color: #ff9f43;
            font-size: 24px;
            margin-bottom: 10px;
        }

        .review-score {
            font-size: 5rem;
            font-weight: 800;
            color: var(--primary-dark);
            line-height: 1;
        }

        .review-score-wrapper {
            display: flex;
            align-items: baseline;
            gap: 5px;
        }

        .review-score-max {
            font-size: 20px;
            color: var(--text-muted);
        }

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

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

        th, td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--gray-border);
            font-size: 14px;
        }

        th {
            background-color: var(--gray-light);
            color: var(--dark);
            font-weight: bold;
        }

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

        .highlight-col {
            background-color: rgba(0, 168, 150, 0.03);
            font-weight: 500;
        }

        /* 培训版块 */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 15px;
        }

        .training-card {
            background: var(--white);
            border: 1px solid var(--gray-border);
            border-radius: 12px;
            padding: 24px 15px;
            text-align: center;
            transition: var(--transition);
        }

        .training-card:hover {
            border-color: var(--primary);
            box-shadow: 0 10px 20px rgba(0, 168, 150, 0.05);
            transform: translateY(-3px);
        }

        .training-card h3 {
            font-size: 15px;
            color: var(--dark);
            margin-bottom: 15px;
        }

        .training-badge {
            background-color: var(--primary-light);
            color: var(--primary);
            font-size: 12px;
            padding: 4px 10px;
            border-radius: 12px;
            font-weight: bold;
        }

        /* FAQ折叠面板 */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

        .faq-question {
            padding: 18px 24px;
            font-weight: bold;
            color: var(--dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
        }

        .faq-question::after {
            content: '+';
            font-size: 20px;
            color: var(--primary);
            transition: var(--transition);
        }

        .faq-item.active .faq-question::after {
            content: '-';
            transform: rotate(90deg);
        }

        .faq-answer {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            color: var(--text-muted);
            font-size: 14px;
            border-top: 1px solid transparent;
        }

        .faq-item.active .faq-answer {
            padding: 18px 24px;
            max-height: 200px;
            border-top-color: var(--gray-border);
        }

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

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

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

        .avatar-placeholder {
            width: 48px;
            height: 48px;
            background-color: var(--primary-light);
            color: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
        }

        .user-info h4 {
            font-size: 15px;
            color: var(--dark);
        }

        .user-info span {
            font-size: 12px;
            color: var(--text-muted);
        }

        .review-text {
            font-size: 14px;
            color: var(--text-muted);
            font-style: italic;
        }

        /* 最新资讯与文章 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

        .news-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .news-item {
            background: var(--white);
            padding: 20px;
            border-radius: 8px;
            border: 1px solid var(--gray-border);
            display: flex;
            flex-direction: column;
            gap: 8px;
            transition: var(--transition);
        }

        .news-item:hover {
            border-color: var(--primary);
            transform: translateX(5px);
        }

        .news-title {
            font-weight: bold;
            color: var(--dark);
            font-size: 15px;
        }

        .news-link {
            color: var(--primary);
            font-size: 13px;
            font-weight: bold;
            align-self: flex-start;
        }

        /* 需求匹配与联系我们表单 */
        .contact-section-grid {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 50px;
        }

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

        .info-item {
            display: flex;
            gap: 15px;
        }

        .info-icon {
            font-size: 24px;
            color: var(--primary);
        }

        .info-content h4 {
            font-size: 16px;
            color: var(--dark);
            margin-bottom: 5px;
        }

        .info-content p {
            font-size: 14px;
            color: var(--text-muted);
        }

        .qr-codes {
            display: flex;
            gap: 20px;
            margin-top: 20px;
        }

        .qr-card {
            background: var(--white);
            border: 1px solid var(--gray-border);
            padding: 15px;
            border-radius: 8px;
            text-align: center;
            width: 140px;
        }

        .qr-card img {
            width: 110px;
            height: 110px;
            margin-bottom: 10px;
        }

        .qr-card span {
            font-size: 12px;
            color: var(--text-dark);
            font-weight: 500;
        }

        .contact-form {
            background: var(--white);
            border-radius: 12px;
            padding: 40px;
            border: 1px solid var(--gray-border);
            box-shadow: 0 10px 30px rgba(0,0,0,0.03);
        }

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

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-size: 14px;
            font-weight: 500;
            color: var(--dark);
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--gray-border);
            border-radius: 8px;
            font-size: 14px;
            outline: none;
            transition: var(--transition);
        }

        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(0, 168, 150, 0.1);
        }

        textarea.form-control {
            height: 120px;
            resize: vertical;
        }

        /* 友情链接与合作 */
        .links-area {
            background-color: var(--white);
            padding: 30px 0;
            border-top: 1px solid var(--gray-border);
        }

        .links-wrap {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            font-size: 13px;
            color: var(--text-muted);
            align-items: center;
        }

        .links-wrap a {
            color: var(--text-muted);
        }

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

        /* 页脚 */
        footer {
            background-color: var(--dark);
            color: rgba(255,255,255,0.7);
            padding: 50px 0 30px;
            font-size: 14px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr repeat(3, 1fr);
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand h3 {
            color: var(--white);
            font-size: 20px;
            margin-bottom: 15px;
        }

        .footer-col h4 {
            color: var(--white);
            font-size: 16px;
            margin-bottom: 15px;
            position: relative;
        }

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

        .footer-col a {
            color: rgba(255,255,255,0.7);
        }

        .footer-col a:hover {
            color: var(--primary);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
        }

        /* 侧边悬浮 */
        .floating-action {
            position: fixed;
            right: 20px;
            bottom: 30px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            z-index: 999;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            background-color: var(--white);
            border: 1px solid var(--gray-border);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0 4px 10px rgba(0,0,0,0.1);
            transition: var(--transition);
            position: relative;
        }

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

        .float-btn svg {
            width: 22px;
            height: 22px;
            fill: currentColor;
        }

        .qr-popover {
            position: absolute;
            right: 60px;
            bottom: 0;
            background: var(--white);
            border: 1px solid var(--gray-border);
            padding: 15px;
            border-radius: 8px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.15);
            display: none;
            text-align: center;
            width: 150px;
        }

        .qr-popover img {
            width: 120px;
            height: 120px;
            margin-bottom: 5px;
        }

        .qr-popover span {
            font-size: 12px;
            color: var(--text-dark);
            font-weight: bold;
        }

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

        /* 动画效果 */
        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.03); }
            100% { transform: scale(1); }
        }

        /* 响应式媒体查询 */
        @media (max-width: 992px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .service-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cases-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .training-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .contact-section-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            h1.hero-title {
                font-size: 1.8rem;
            }
            .nav-menu {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: var(--white);
                border-bottom: 1px solid var(--gray-border);
                flex-direction: column;
                padding: 20px;
                gap: 15px;
                box-shadow: 0 4px 6px rgba(0,0,0,0.05);
            }
            .nav-menu.active {
                display: flex;
            }
            .menu-toggle {
                display: flex;
            }
            .workflow-steps {
                grid-template-columns: 1fr;
            }
            .training-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .reviews-grid {
                grid-template-columns: 1fr;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }