:root {
            --primary: #E60012; /* 艳红 */
            --primary-hover: #C4000F;
            --secondary: #FFCC00; /* 金黄辅助 */
            --dark: #1A1A1A;
            --light-bg: #FFF5F5;
            --white: #FFFFFF;
            --gray-100: #F8F9FA;
            --gray-200: #E9ECEF;
            --gray-600: #6C757D;
            --gray-800: #343A40;
            --transition: all 0.3s ease;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--white);
            color: var(--dark);
            line-height: 1.6;
            overflow-x: hidden;
        }

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

        section {
            padding: 80px 0;
        }

        .section-title {
            text-align: center;
            margin-bottom: 50px;
            position: relative;
        }

        .section-title h2 {
            font-size: 2.2rem;
            color: var(--dark);
            font-weight: 700;
            margin-bottom: 15px;
        }

        .section-title h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background-color: var(--primary);
            margin: 10px auto 0;
            border-radius: 2px;
        }

        .section-title p {
            color: var(--gray-600);
            font-size: 1.1rem;
        }

        /* 按钮样式 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 4px;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
        }

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

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

        .btn-secondary {
            background-color: var(--secondary);
            color: var(--dark);
        }

        .btn-secondary:hover {
            background-color: #E6B800;
            transform: translateY(-2px);
        }

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

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

        /* 导航栏 */
        .header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: 0 2px 15px rgba(0,0,0,0.05);
            backdrop-filter: blur(10px);
        }

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

        .logo-box {
            display: flex;
            align-items: center;
        }

        .ai-page-logo {
            max-height: 45px;
            width: auto;
        }

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

        .nav-link {
            text-decoration: none;
            color: var(--gray-800);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            padding: 5px 0;
            border-bottom: 2px solid transparent;
        }

        .nav-link:hover {
            color: var(--primary);
            border-bottom-color: var(--primary);
        }

        .ai-page-home-link {
            text-decoration: none;
            color: var(--primary);
            font-weight: bold;
        }

        /* 汉堡按钮 */
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            background: none;
            border: none;
        }

        .nav-toggle span {
            display: block;
            width: 25px;
            height: 3px;
            background-color: var(--dark);
            transition: var(--transition);
        }

        /* 首屏 Hero - 无图片，纯色/渐变/科技感 */
        .hero {
            background: linear-gradient(135deg, #7A000A 0%, #E60012 50%, #FF3B30 100%);
            color: var(--white);
            padding: 120px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        /* 装饰背景粒子效果，通过CSS渲染 */
        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(circle at 80% 20%, rgba(255, 204, 0, 0.15) 0%, transparent 50%),
                        radial-gradient(circle at 10% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 40%);
            pointer-events: none;
        }

        .hero-content {
            max-width: 800px;
            margin: 0 auto;
            position: relative;
            z-index: 10;
        }

        .hero-title-h1 {
            font-size: 2.8rem;
            font-weight: 800;
            margin-bottom: 20px;
            line-height: 1.2;
            text-shadow: 0 2px 10px rgba(0,0,0,0.2);
        }

        .hero-subtitle {
            font-size: 1.25rem;
            margin-bottom: 40px;
            opacity: 0.9;
        }

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

        /* 数据指标 */
        .stats {
            background-color: var(--white);
            margin-top: -50px;
            position: relative;
            z-index: 20;
            border-radius: 8px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
            padding: 30px 10px;
        }

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

        .stats-item h3 {
            font-size: 2.2rem;
            color: var(--primary);
            margin-bottom: 5px;
        }

        .stats-item p {
            font-size: 0.9rem;
            color: var(--gray-600);
        }

        /* 关于我们与服务网络 */
        .about-section {
            background-color: var(--light-bg);
        }

        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

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

        .about-text p {
            color: var(--gray-600);
            margin-bottom: 20px;
        }

        .network-card {
            background-color: var(--white);
            padding: 30px;
            border-radius: 8px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.05);
            border-left: 5px solid var(--primary);
        }

        /* AIGC能力卡片 */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            margin-top: 40px;
        }

        .service-card {
            background-color: var(--white);
            border: 1px solid var(--gray-200);
            border-radius: 8px;
            padding: 30px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(230,0,18,0.1);
            border-color: var(--primary);
        }

        .service-card h3 {
            font-size: 1.3rem;
            margin-bottom: 15px;
            color: var(--dark);
        }

        .service-card p {
            color: var(--gray-600);
            font-size: 0.95rem;
        }

        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 15px;
        }

        .tag {
            background-color: var(--light-bg);
            color: var(--primary);
            padding: 3px 8px;
            border-radius: 4px;
            font-size: 0.8rem;
            font-weight: 500;
        }

        /* 聚合平台列表 */
        .platform-section {
            background-color: var(--dark);
            color: var(--white);
        }

        .platform-section .section-title h2 {
            color: var(--white);
        }

        .platform-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 15px;
        }

        .platform-badge {
            background-color: rgba(255,255,255,0.1);
            padding: 10px 20px;
            border-radius: 20px;
            font-size: 0.95rem;
            transition: var(--transition);
        }

        .platform-badge:hover {
            background-color: var(--primary);
            transform: scale(1.05);
        }

        /* 解决方案 */
        .solutions-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }

        .solution-card {
            background-color: var(--light-bg);
            padding: 35px;
            border-radius: 8px;
            transition: var(--transition);
        }

        .solution-card:hover {
            background-color: var(--white);
            box-shadow: 0 10px 25px rgba(0,0,0,0.08);
        }

        /* 步骤流程 */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .step-item {
            background-color: var(--white);
            border: 1px solid var(--gray-200);
            border-radius: 8px;
            padding: 25px;
            text-align: center;
            position: relative;
        }

        .step-number {
            width: 40px;
            height: 40px;
            background-color: var(--primary);
            color: var(--white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            margin: 0 auto 15px;
        }

        /* 对比评测 */
        .compare-section {
            background-color: var(--light-bg);
        }

        .compare-header {
            background: linear-gradient(135deg, #1A1A1A 0%, #2C2C2C 100%);
            color: var(--white);
            padding: 30px;
            border-radius: 8px 8px 0 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }

        .compare-score {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .score-num {
            font-size: 3rem;
            color: var(--secondary);
            font-weight: 800;
            line-height: 1;
        }

        .score-star {
            color: var(--secondary);
            font-size: 1.5rem;
        }

        .table-responsive {
            width: 100%;
            overflow-x: auto;
            background-color: var(--white);
            border-radius: 0 0 8px 8px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.05);
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 700px;
        }

        .compare-table th, .compare-table td {
            padding: 18px 20px;
            text-align: left;
            border-bottom: 1px solid var(--gray-200);
        }

        .compare-table th {
            background-color: var(--gray-100);
            font-weight: 700;
        }

        .compare-table td strong {
            color: var(--primary);
        }

        /* 案例与素材图 */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

        .case-card {
            border: 1px solid var(--gray-200);
            border-radius: 8px;
            overflow: hidden;
            background-color: var(--white);
            transition: var(--transition);
        }

        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        }

        .case-img-box {
            position: relative;
            background-color: var(--gray-200);
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .ai-page-image {
            width: 100%;
            height: auto;
            object-fit: cover;
            display: block;
        }

        .case-info {
            padding: 20px;
        }

        /* 培训板块 */
        .training-section {
            background-color: var(--light-bg);
        }

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

        .training-card {
            background-color: var(--white);
            border-top: 4px solid var(--primary);
            padding: 30px;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }

        .training-card h3 {
            margin-bottom: 15px;
            font-size: 1.25rem;
        }

        /* 用户评论 */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

        .review-card {
            background-color: var(--white);
            border: 1px solid var(--gray-200);
            padding: 25px;
            border-radius: 8px;
            box-shadow: 0 4px 10px rgba(0,0,0,0.02);
        }

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

        .avatar-placeholder {
            width: 45px;
            height: 45px;
            background-color: var(--primary);
            color: var(--white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
        }

        .user-info h4 {
            font-size: 0.95rem;
            margin-bottom: 2px;
        }

        .user-info span {
            font-size: 0.8rem;
            color: var(--gray-600);
        }

        .review-content {
            font-size: 0.9rem;
            color: var(--gray-800);
            font-style: italic;
        }

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

        .faq-item {
            border-bottom: 1px solid var(--gray-200);
            padding: 15px 0;
        }

        .faq-question {
            width: 100%;
            background: none;
            border: none;
            text-align: left;
            font-size: 1.05rem;
            font-weight: 600;
            padding: 10px 0;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--dark);
        }

        .faq-question::after {
            content: '+';
            font-size: 1.5rem;
            color: var(--primary);
            transition: var(--transition);
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            color: var(--gray-600);
            font-size: 0.95rem;
        }

        .faq-item.active .faq-answer {
            max-height: 200px;
            padding-bottom: 10px;
        }

        /* 文章与知识库 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 25px;
        }

        .news-card {
            border: 1px solid var(--gray-200);
            padding: 20px;
            border-radius: 8px;
            background-color: var(--white);
        }

        .news-card h3 {
            font-size: 1.15rem;
            margin-bottom: 10px;
        }

        .news-card a {
            color: var(--primary);
            text-decoration: none;
            font-weight: 600;
            font-size: 0.9rem;
        }

        .news-card a:hover {
            text-decoration: underline;
        }

        /* 自助排查与术语 */
        .tools-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }

        .tool-box {
            background-color: var(--light-bg);
            padding: 30px;
            border-radius: 8px;
        }

        .tool-box h3 {
            font-size: 1.3rem;
            margin-bottom: 20px;
            color: var(--dark);
        }

        .term-list {
            list-style: none;
        }

        .term-list li {
            margin-bottom: 10px;
            padding-left: 15px;
            position: relative;
        }

        .term-list li::before {
            content: '•';
            color: var(--primary);
            position: absolute;
            left: 0;
        }

        /* 表单与联系我们 */
        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 50px;
            align-items: start;
        }

        .contact-info {
            background-color: var(--dark);
            color: var(--white);
            padding: 40px;
            border-radius: 8px;
        }

        .contact-info h3 {
            font-size: 1.5rem;
            margin-bottom: 25px;
            border-bottom: 2px solid var(--primary);
            padding-bottom: 10px;
        }

        .contact-item {
            margin-bottom: 20px;
            display: flex;
            gap: 15px;
        }

        .contact-item span {
            font-weight: bold;
            color: var(--secondary);
        }

        .qr-codes {
            display: flex;
            gap: 20px;
            margin-top: 30px;
            flex-wrap: wrap;
        }

        .qr-item {
            text-align: center;
            font-size: 0.85rem;
        }

        .qr-item img {
            width: 120px;
            height: 120px;
            border-radius: 4px;
            margin-bottom: 5px;
            background-color: var(--white);
            padding: 5px;
        }

        .contact-form {
            background-color: var(--white);
            border: 1px solid var(--gray-200);
            padding: 40px;
            border-radius: 8px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.05);
        }

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

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            font-size: 0.9rem;
        }

        .form-control {
            width: 100%;
            padding: 10px 15px;
            border: 1px solid var(--gray-200);
            border-radius: 4px;
            font-size: 0.95rem;
            outline: none;
            transition: var(--transition);
        }

        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 5px rgba(230,0,18,0.2);
        }

        /* 友情链接与页脚 */
        .footer {
            background-color: #111111;
            color: var(--gray-600);
            padding: 50px 0 20px;
            font-size: 0.85rem;
            border-top: 3px solid var(--primary);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-column h4 {
            color: var(--white);
            font-size: 1rem;
            margin-bottom: 20px;
        }

        .friend-links a {
            color: var(--gray-600);
            text-decoration: none;
            margin-right: 15px;
            display: inline-block;
            margin-bottom: 10px;
            transition: var(--transition);
        }

        .friend-links a:hover {
            color: var(--white);
        }

        .footer-bottom {
            border-top: 1px solid #222;
            padding-top: 20px;
            text-align: center;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
        }

        /* 浮动客服 */
        .floating-kf {
            position: fixed;
            right: 20px;
            bottom: 40px;
            z-index: 999;
            background-color: var(--primary);
            color: var(--white);
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0 5px 15px rgba(0,0,0,0.2);
            transition: var(--transition);
        }

        .floating-kf:hover {
            transform: scale(1.1);
        }

        .kf-popover {
            display: none;
            position: absolute;
            bottom: 60px;
            right: 0;
            background-color: var(--white);
            border: 1px solid var(--gray-200);
            padding: 15px;
            border-radius: 8px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.15);
            text-align: center;
            color: var(--dark);
            width: 160px;
        }

        .kf-popover img {
            width: 130px;
            height: 130px;
            margin-bottom: 8px;
        }

        .floating-kf:hover .kf-popover {
            display: block;
        }

        /* 响应式调整 */
        @media (max-width: 992px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .about-grid, .solutions-grid, .contact-grid, .tools-grid {
                grid-template-columns: 1fr;
            }
            .services-grid, .case-grid, .training-grid, .reviews-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: var(--white);
                padding: 20px;
                box-shadow: 0 10px 15px rgba(0,0,0,0.05);
                gap: 15px;
            }
            .nav-menu.show {
                display: flex;
            }
            .nav-toggle {
                display: flex;
            }
            .hero-title-h1 {
                font-size: 2rem;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .services-grid, .case-grid, .training-grid, .reviews-grid, .news-grid {
                grid-template-columns: 1fr;
            }
        }