/* 基础变量与重置 */
        :root {
            --primary: #d91d36;      /* 艳红 */
            --primary-hover: #ff334b;
            --primary-dark: #a30014;
            --secondary: #ff7875;
            --dark: #1f1f1f;
            --light: #fafafa;
            --white: #ffffff;
            --gray-100: #f5f5f5;
            --gray-200: #e8e8e8;
            --gray-300: #bfbfbf;
            --gray-600: #595959;
            --shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --container-width: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans CJK SC", sans-serif;
            color: var(--dark);
            background-color: var(--white);
            line-height: 1.6;
        }

        body {
            overflow-x: hidden;
        }

        /* 统一容器 */
        .container {
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 辅助组件 */
        .section-padding {
            padding: 80px 0;
        }

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

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

        .section-title h2 span {
            color: var(--primary);
        }

        .section-title p {
            color: var(--gray-600);
            font-size: 1.1rem;
            max-width: 700px;
            margin: 0 auto;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 6px;
            transition: var(--transition);
            cursor: pointer;
            text-decoration: none;
            border: none;
        }

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

        .btn-primary:hover {
            background-color: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 4px 15px rgba(217, 29, 54, 0.4);
        }

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

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

        .badge {
            display: inline-block;
            padding: 4px 12px;
            background-color: rgba(217, 29, 54, 0.1);
            color: var(--primary);
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 15px;
        }

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

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

        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
        }

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

        .logo-text {
            font-size: 1.3rem;
            font-weight: 750;
            color: var(--primary);
            letter-spacing: 0.5px;
        }

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

        .nav-link {
            text-decoration: none;
            color: var(--dark);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
        }

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

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .burger-menu {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            border: none;
            background: transparent;
        }

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

        /* 首屏 Hero Section - 坚决不使用任何图片 */
        .hero-section {
            padding-top: 150px;
            padding-bottom: 100px;
            background: radial-gradient(circle at 10% 20%, rgba(217, 29, 54, 0.08) 0%, rgba(0, 0, 0, 0.02) 90%), linear-gradient(135deg, #ffffff 0%, #fff1f0 100%);
            position: relative;
            overflow: hidden;
            display: flex;
            align-items: center;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -10%;
            right: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(217, 29, 54, 0.12) 0%, transparent 70%);
            filter: blur(50px);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 900px;
            margin: 0 auto;
        }

        .hero-content h1 {
            font-size: 2.8rem;
            line-height: 1.25;
            font-weight: 800;
            color: var(--dark);
            margin-bottom: 24px;
            letter-spacing: -0.5px;
        }

        .hero-content h1 span {
            color: var(--primary);
            position: relative;
            display: inline-block;
        }

        .hero-content h1 span::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 0;
            width: 100%;
            height: 8px;
            background: rgba(217, 29, 54, 0.15);
            z-index: -1;
        }

        .hero-content p {
            font-size: 1.25rem;
            color: var(--gray-600);
            margin-bottom: 35px;
            line-height: 1.8;
        }

        .hero-buttons {
            display: flex;
            gap: 15px;
            justify-content: center;
            margin-bottom: 40px;
            flex-wrap: wrap;
        }

        .hero-features {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 30px;
        }

        .hero-feat-card {
            background: rgba(255, 255, 255, 0.85);
            border: 1px solid rgba(217, 29, 54, 0.1);
            padding: 20px 15px;
            border-radius: 8px;
            backdrop-filter: blur(5px);
            box-shadow: 0 4px 20px rgba(0,0,0,0.02);
            transition: var(--transition);
        }

        .hero-feat-card:hover {
            transform: translateY(-5px);
            border-color: var(--primary);
        }

        .hero-feat-card h4 {
            color: var(--primary);
            font-size: 1.15rem;
            margin-bottom: 8px;
            font-weight: 700;
        }

        .hero-feat-card p {
            font-size: 0.85rem;
            color: var(--gray-600);
            margin-bottom: 0;
            line-height: 1.4;
        }

        /* 数据指标卡片 */
        .stats-section {
            background-color: var(--white);
            margin-top: -30px;
            position: relative;
            z-index: 10;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            background-color: var(--white);
            box-shadow: 0 10px 40px rgba(217, 29, 54, 0.08);
            border-radius: 12px;
            padding: 30px;
            border: 1px solid rgba(217, 29, 54, 0.05);
        }

        .stats-item {
            text-align: center;
            border-right: 1px solid var(--gray-200);
        }

        .stats-item:last-child {
            border-right: none;
        }

        .stats-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 5px;
        }

        .stats-label {
            font-size: 0.95rem;
            color: var(--gray-600);
        }

        /* 关于我们与平台介绍 */
        .about-section {
            background-color: var(--light);
        }

        .about-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 50px;
            align-items: center;
        }

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

        .about-content p {
            margin-bottom: 20px;
            color: var(--gray-600);
            font-size: 1.05rem;
        }

        .about-features {
            list-style: none;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
            margin-top: 30px;
        }

        .about-features li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 550;
            color: var(--dark);
        }

        .about-features li::before {
            content: '✓';
            color: var(--primary);
            font-weight: bold;
            font-size: 1.1rem;
        }

        .about-media-box {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            border-radius: 16px;
            padding: 40px;
            color: var(--white);
            position: relative;
            overflow: hidden;
            box-shadow: 0 15px 35px rgba(217, 29, 54, 0.25);
        }

        .about-media-box h4 {
            font-size: 1.5rem;
            margin-bottom: 15px;
            color: var(--white);
        }

        .about-media-box p {
            font-size: 0.95rem;
            opacity: 0.9;
            margin-bottom: 30px;
            color: var(--white);
        }

        /* 全平台AIGC服务 */
        .services-section {
            background-color: var(--white);
        }

        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .service-card {
            border: 1px solid var(--gray-200);
            border-radius: 12px;
            padding: 35px;
            transition: var(--transition);
            background: var(--white);
        }

        .service-card:hover {
            transform: translateY(-8px);
            border-color: var(--primary);
            box-shadow: var(--shadow);
        }

        .service-icon {
            font-size: 2.2rem;
            color: var(--primary);
            margin-bottom: 20px;
        }

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

        .service-card p {
            color: var(--gray-600);
            font-size: 0.95rem;
            margin-bottom: 20px;
        }

        .service-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .service-tag {
            font-size: 0.75rem;
            padding: 3px 8px;
            background-color: var(--gray-100);
            color: var(--gray-600);
            border-radius: 4px;
        }

        /* 标签云支持模型展示 */
        .model-cloud-wrapper {
            margin-top: 50px;
            background-color: var(--light);
            border-radius: 12px;
            padding: 30px;
            text-align: center;
        }

        .model-cloud-wrapper h4 {
            margin-bottom: 20px;
            color: var(--dark);
        }

        .model-cloud {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
        }

        .model-badge {
            background: var(--white);
            border: 1px solid var(--gray-200);
            padding: 6px 14px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 550;
            color: var(--dark);
            transition: var(--transition);
        }

        .model-badge:hover {
            background-color: var(--primary);
            color: var(--white);
            border-color: var(--primary);
        }

        /* 一站式AIGC制作 - 包含核心场景 */
        .creation-section {
            background-color: var(--light);
        }

        .creation-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 40px;
        }

        .creation-item {
            background: var(--white);
            border-radius: 12px;
            padding: 30px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.02);
            display: flex;
            gap: 20px;
            transition: var(--transition);
        }

        .creation-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }

        .creation-num {
            font-size: 2.2rem;
            font-weight: 800;
            color: rgba(217, 29, 54, 0.2);
            line-height: 1;
        }

        .creation-info h3 {
            font-size: 1.25rem;
            margin-bottom: 10px;
            color: var(--dark);
        }

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

        /* 全行业解决方案 */
        .solutions-section {
            background-color: var(--white);
        }

        .solutions-tabs-container {
            display: grid;
            grid-template-columns: 250px 1fr;
            gap: 40px;
            margin-top: 30px;
        }

        .solutions-nav {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .solution-tab-btn {
            padding: 15px 20px;
            border: none;
            background-color: var(--light);
            color: var(--dark);
            text-align: left;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 8px;
            cursor: pointer;
            transition: var(--transition);
            border-left: 4px solid transparent;
        }

        .solution-tab-btn.active, .solution-tab-btn:hover {
            background-color: rgba(217, 29, 54, 0.05);
            color: var(--primary);
            border-left-color: var(--primary);
        }

        .solution-content-panel {
            background-color: var(--light);
            border-radius: 12px;
            padding: 40px;
            min-height: 300px;
            display: none;
        }

        .solution-content-panel.active {
            display: block;
            animation: fadeIn 0.4s ease;
        }

        .solution-content-panel h3 {
            font-size: 1.6rem;
            margin-bottom: 20px;
            color: var(--primary);
        }

        .solution-content-panel ul {
            margin-top: 20px;
            list-style-position: inside;
            color: var(--gray-600);
        }

        .solution-content-panel li {
            margin-bottom: 8px;
        }

        /* 全国服务网络 */
        .network-section {
            background: linear-gradient(135deg, #1f1f1f 0%, #111111 100%);
            color: var(--white);
        }

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

        .network-section .section-title p {
            color: var(--gray-300);
        }

        .network-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 25px;
            text-align: center;
        }

        .network-card {
            background-color: rgba(255,255,255,0.05);
            border: 1px solid rgba(255,255,255,0.1);
            padding: 30px 20px;
            border-radius: 8px;
            transition: var(--transition);
        }

        .network-card:hover {
            background-color: rgba(217, 29, 54, 0.15);
            border-color: var(--primary);
        }

        .network-card h3 {
            font-size: 1.25rem;
            color: var(--white);
            margin-bottom: 10px;
        }

        .network-card p {
            color: var(--gray-300);
            font-size: 0.85rem;
        }

        /* 标准化AIGC流程 */
        .flow-section {
            background-color: var(--light);
        }

        .flow-timeline {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
            position: relative;
            margin-top: 40px;
        }

        .flow-step {
            background-color: var(--white);
            border-radius: 8px;
            padding: 25px;
            position: relative;
            box-shadow: 0 4px 10px rgba(0,0,0,0.02);
            transition: var(--transition);
        }

        .flow-step:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow);
            border-top: 4px solid var(--primary);
        }

        .flow-step-num {
            display: inline-block;
            width: 30px;
            height: 30px;
            background-color: var(--primary);
            color: var(--white);
            border-radius: 50%;
            text-align: center;
            line-height: 30px;
            font-weight: bold;
            margin-bottom: 15px;
        }

        .flow-step h3 {
            font-size: 1.15rem;
            margin-bottom: 10px;
            color: var(--dark);
        }

        .flow-step p {
            font-size: 0.85rem;
            color: var(--gray-600);
        }

        /* 技术标准 */
        .standards-section {
            background-color: var(--white);
        }

        .standards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .standard-card {
            background-color: var(--light);
            border-radius: 12px;
            padding: 30px;
            border-top: 4px solid var(--gray-300);
            transition: var(--transition);
        }

        .standard-card:hover {
            border-top-color: var(--primary);
            box-shadow: var(--shadow);
        }

        .standard-card h3 {
            font-size: 1.25rem;
            margin-bottom: 15px;
            color: var(--dark);
        }

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

        /* 对比评测 - 强视觉展示要求 */
        .eval-section {
            background-color: var(--light);
        }

        .eval-box {
            background-color: var(--white);
            border-radius: 16px;
            box-shadow: var(--shadow);
            padding: 40px;
            border: 1px solid rgba(217, 29, 54, 0.1);
        }

        .eval-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid var(--gray-200);
            padding-bottom: 30px;
            margin-bottom: 30px;
            flex-wrap: wrap;
            gap: 20px;
        }

        .eval-score-area {
            display: flex;
            align-items: center;
            gap: 20px;
        }

        .eval-stars {
            font-size: 1.8rem;
            color: #fadb14; /* 金黄色星星 */
        }

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

        .eval-score-num span {
            font-size: 1.2rem;
            color: var(--gray-600);
            font-weight: normal;
        }

        .eval-table-wrapper {
            overflow-x: auto;
        }

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

        .eval-table th, .eval-table td {
            padding: 15px;
            border-bottom: 1px solid var(--gray-200);
        }

        .eval-table th {
            background-color: var(--light);
            font-weight: 700;
            color: var(--dark);
        }

        .eval-table tr:hover {
            background-color: rgba(217, 29, 54, 0.02);
        }

        .highlight-td {
            color: var(--primary);
            font-weight: 600;
        }

        /* Token比价参考 */
        .token-price-section {
            background-color: var(--white);
        }

        .price-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .price-card {
            border: 1px solid var(--gray-200);
            border-radius: 12px;
            overflow: hidden;
            transition: var(--transition);
            background-color: var(--white);
        }

        .price-card:hover {
            box-shadow: var(--shadow);
            border-color: var(--primary);
        }

        .price-card-header {
            background-color: var(--light);
            padding: 25px;
            border-bottom: 1px solid var(--gray-200);
            text-align: center;
        }

        .price-card-header h3 {
            font-size: 1.3rem;
            margin-bottom: 10px;
            color: var(--dark);
        }

        .price-cost {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
        }

        .price-cost span {
            font-size: 0.9rem;
            font-weight: normal;
            color: var(--gray-600);
        }

        .price-features {
            list-style: none;
            padding: 25px;
        }

        .price-features li {
            padding: 8px 0;
            border-bottom: 1px dashed var(--gray-200);
            font-size: 0.9rem;
            color: var(--gray-600);
            display: flex;
            justify-content: space-between;
        }

        .price-features li:last-child {
            border-bottom: none;
        }

        /* 职业技术与人工智能培训 */
        .training-section {
            background-color: var(--light);
        }

        .training-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
        }

        .training-card {
            background-color: var(--white);
            border-radius: 12px;
            padding: 25px 20px;
            text-align: center;
            box-shadow: 0 4px 10px rgba(0,0,0,0.02);
            border-top: 3px solid var(--primary);
            transition: var(--transition);
        }

        .training-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow);
        }

        .training-card h3 {
            font-size: 1.1rem;
            color: var(--dark);
            margin-bottom: 12px;
        }

        .training-card p {
            font-size: 0.8rem;
            color: var(--gray-600);
        }

        /* 客户案例中心 */
        .cases-section {
            background-color: var(--white);
        }

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

        .case-card {
            border-radius: 12px;
            overflow: hidden;
            background-color: var(--white);
            border: 1px solid var(--gray-200);
            transition: var(--transition);
        }

        .case-card:hover {
            box-shadow: var(--shadow);
            border-color: var(--primary);
        }

        .case-img-container {
            width: 100%;
            aspect-ratio: 16/9;
            overflow: hidden;
            background-color: var(--gray-100);
        }

        .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-info h4 {
            font-size: 1.15rem;
            margin-bottom: 10px;
            color: var(--dark);
        }

        .case-info p {
            color: var(--gray-600);
            font-size: 0.85rem;
        }

        /* 客户评论卡片 (6条要求) */
        .reviews-section {
            background-color: var(--light);
        }

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

        .review-card {
            background-color: var(--white);
            padding: 30px;
            border-radius: 12px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.02);
            transition: var(--transition);
        }

        .review-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow);
        }

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

        .review-avatar-text {
            width: 45px;
            height: 45px;
            background-color: rgba(217, 29, 54, 0.1);
            color: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
        }

        .review-meta h4 {
            font-size: 1rem;
            color: var(--dark);
            margin-bottom: 2px;
        }

        .review-meta p {
            font-size: 0.8rem;
            color: var(--gray-600);
        }

        .review-content {
            font-size: 0.9rem;
            color: var(--gray-600);
            line-height: 1.5;
        }

        /* 智能需求匹配与联系我们 */
        .contact-section {
            background-color: var(--white);
        }

        .contact-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 50px;
        }

        .contact-form-box {
            background-color: var(--light);
            padding: 40px;
            border-radius: 16px;
            border: 1px solid var(--gray-200);
        }

        .contact-form-box h3 {
            font-size: 1.5rem;
            margin-bottom: 25px;
            color: var(--dark);
        }

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

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

        .form-control {
            width: 100%;
            padding: 12px;
            border: 1px solid var(--gray-300);
            background-color: var(--white);
            border-radius: 6px;
            font-size: 1rem;
            transition: var(--transition);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(217, 29, 54, 0.1);
        }

        .contact-info-box {
            background-color: var(--white);
            border: 1px solid var(--gray-200);
            padding: 40px;
            border-radius: 16px;
            display: flex;
            flex-direction: column;
            gap: 25px;
        }

        .contact-info-item h4 {
            font-size: 1.1rem;
            color: var(--dark);
            margin-bottom: 5px;
        }

        .contact-info-item p {
            color: var(--gray-600);
            font-size: 0.95rem;
        }

        .kefu-qrcode-area {
            text-align: center;
            border-top: 1px solid var(--gray-200);
            padding-top: 25px;
        }

        .kefu-qrcode-area img {
            max-width: 150px;
            height: auto;
            border: 1px solid var(--gray-200);
            padding: 5px;
            background-color: var(--white);
            border-radius: 4px;
        }

        /* 帮助中心与FAQ */
        .help-section {
            background-color: var(--light);
        }

        .faq-accordion {
            max-width: 850px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

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

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

        .faq-header:hover {
            color: var(--primary);
        }

        .faq-icon {
            font-weight: bold;
            font-size: 1.2rem;
            transition: var(--transition);
        }

        .faq-content {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out, padding 0.3s ease-out;
            color: var(--gray-600);
            font-size: 0.95rem;
            border-top: 1px solid transparent;
        }

        .faq-item.active .faq-content {
            padding: 20px;
            max-height: 300px;
            border-top-color: var(--gray-200);
        }

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

        /* 自助排查与术语百科 */
        .troubleshoot-百科-grid {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 40px;
            margin-top: 40px;
        }

        .troubleshoot-box, .encyclopedia-box {
            background-color: var(--white);
            padding: 30px;
            border-radius: 12px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.02);
            border: 1px solid var(--gray-200);
        }

        .troubleshoot-box h3, .encyclopedia-box h3 {
            font-size: 1.3rem;
            margin-bottom: 20px;
            color: var(--dark);
            border-left: 4px solid var(--primary);
            padding-left: 10px;
        }

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

        .troubleshoot-list li, .encyclopedia-list li {
            padding-bottom: 12px;
            border-bottom: 1px dashed var(--gray-200);
        }

        .troubleshoot-list li:last-child, .encyclopedia-list li:last-child {
            border-bottom: none;
        }

        .troubleshoot-title, .encyclopedia-title {
            font-weight: 600;
            color: var(--dark);
            font-size: 0.95rem;
            margin-bottom: 4px;
        }

        .troubleshoot-desc, .encyclopedia-desc {
            font-size: 0.85rem;
            color: var(--gray-600);
        }

        /* 行业资讯 / 知识库 */
        .kb-section {
            background-color: var(--white);
        }

        .kb-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }

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

        .kb-item {
            padding: 20px;
            background-color: var(--light);
            border-radius: 8px;
            transition: var(--transition);
        }

        .kb-item:hover {
            transform: translateX(5px);
            background-color: rgba(217, 29, 54, 0.03);
        }

        .kb-item a {
            text-decoration: none;
            color: var(--dark);
            font-weight: 600;
            font-size: 1rem;
            display: block;
            margin-bottom: 5px;
            transition: var(--transition);
        }

        .kb-item a:hover {
            color: var(--primary);
        }

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

        /* 加盟代理被动收入躺赚宣传 */
        .agent-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
            color: var(--white);
            text-align: center;
        }

        .agent-section h2 {
            color: var(--white);
            font-size: 2.2rem;
            margin-bottom: 20px;
        }

        .agent-section p {
            color: rgba(255,255,255,0.9);
            max-width: 800px;
            margin: 0 auto 30px auto;
            font-size: 1.1rem;
        }

        .agent-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            margin-bottom: 40px;
        }

        .agent-card {
            background-color: rgba(255, 255, 255, 0.1);
            padding: 30px;
            border-radius: 12px;
            backdrop-filter: blur(5px);
        }

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

        .agent-card p {
            font-size: 0.9rem;
            margin-bottom: 0;
            opacity: 0.85;
        }

        /* 页脚 */
        footer {
            background-color: var(--dark);
            color: var(--gray-300);
            padding: 60px 0 30px 0;
            font-size: 0.9rem;
            border-top: 5px solid var(--primary);
        }

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

        .footer-info-brand h3 {
            color: var(--white);
            margin-bottom: 15px;
            font-size: 1.4rem;
        }

        .footer-info-brand p {
            margin-bottom: 15px;
            font-size: 0.85rem;
            line-height: 1.6;
        }

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

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

        .footer-links-col a {
            color: var(--gray-300);
            text-decoration: none;
            transition: var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }

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

        .footer-bottom-links a {
            color: var(--gray-600);
            text-decoration: none;
            font-size: 0.85rem;
            transition: var(--transition);
        }

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

        /* 浮动客服 */
        .floating-kefu {
            position: fixed;
            bottom: 40px;
            right: 40px;
            z-index: 999;
        }

        .kefu-trigger {
            width: 60px;
            height: 60px;
            background-color: var(--primary);
            color: var(--white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0 4px 20px rgba(217, 29, 54, 0.4);
            transition: var(--transition);
            position: relative;
        }

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

        .kefu-trigger svg {
            width: 28px;
            height: 28px;
            fill: currentColor;
        }

        .kefu-panel {
            position: absolute;
            bottom: 75px;
            right: 0;
            background-color: var(--white);
            border-radius: 12px;
            box-shadow: var(--shadow);
            padding: 20px;
            width: 250px;
            text-align: center;
            border: 1px solid var(--gray-200);
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
            transition: var(--transition);
        }

        .kefu-panel.show {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .kefu-panel img {
            width: 100%;
            max-width: 150px;
            height: auto;
            margin-bottom: 10px;
        }

        .kefu-panel h4 {
            color: var(--dark);
            font-size: 1rem;
            margin-bottom: 5px;
        }

        .kefu-panel p {
            color: var(--gray-600);
            font-size: 0.8rem;
            margin-bottom: 0;
        }

        /* 动画基础 */
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        /* 响应式媒体查询 */
        @media (max-width: 1024px) {
            .hero-features, .stats-grid, .services-grid, .network-grid, .cases-grid, .reviews-grid, .price-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .training-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .about-grid, .solutions-tabs-container, .contact-grid, .troubleshoot-百科-grid, .kb-grid {
                grid-template-columns: 1fr;
            }
            .solutions-nav {
                flex-direction: row;
                flex-wrap: wrap;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background-color: var(--white);
                padding: 20px;
                box-shadow: 0 4px 15px rgba(0,0,0,0.1);
                border-top: 1px solid var(--gray-200);
            }
            .nav-menu.show {
                display: flex;
            }
            .burger-menu {
                display: flex;
            }
            .hero-content h1 {
                font-size: 2.2rem;
            }
            .hero-features, .stats-grid, .services-grid, .network-grid, .cases-grid, .reviews-grid, .price-grid, .training-grid, .flow-timeline {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .eval-header {
                flex-direction: column;
                align-items: flex-start;
            }
            .eval-box {
                padding: 20px;
            }
            .floating-kefu {
                bottom: 20px;
                right: 20px;
            }
        }