/* 页面标题区域 */
        .page-header {
            margin-top: 70px;
            padding: 60px 0;
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
            color: white;
            text-align: center;
        }
        
        .page-header h1 {
            font-size: 2.8rem;
            margin-bottom: 20px;
            color: var(--secondary-color);
        }
        
        .page-header p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto;
        }
        
        .breadcrumb {
            display: flex;
            justify-content: center;
            margin-top: 20px;
            font-size: 0.9rem;
        }
        
        .breadcrumb a {
            color: var(--secondary-color);
            transition: var(--transition);
        }
        
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        
        .breadcrumb span {
            margin: 0 10px;
        }
        
        /* 知识库内容区域 */
        .knowledge-content {
            padding: 80px 0;
            background-color: white;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 50px;
        }
        
        .section-title h2 {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
        }
        
        .section-title h2::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 3px;
            background-color: var(--secondary-color);
        }
        
        .section-title p {
            color: #718096;
            max-width: 700px;
            margin: 0 auto;
        }
        
        /* 文章网格 */
        .articles-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 30px;
            margin-bottom: 50px;
        }
        
        .article-card {
            background-color: white;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: var(--transition);
        }
        
        .article-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        
        .article-image {
            height: 200px;
            overflow: hidden;
        }
        
        .article-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        
        .article-card:hover .article-image img {
            transform: scale(1.1);
        }
        
        .article-content {
            padding: 25px;
        }
        
        .article-meta {
            display: flex;
            align-items: center;
            margin-bottom: 15px;
            font-size: 0.9rem;
            color: #718096;
        }
        
        .article-category {
            background-color: var(--secondary-color);
            color: var(--primary-color);
            padding: 4px 12px;
            border-radius: 20px;
            font-weight: 600;
            font-size: 0.8rem;
            margin-right: 15px;
        }
        
        .article-date {
            display: flex;
            align-items: center;
        }
        
        .article-date i {
            margin-right: 5px;
        }
        
        .article-content h3 {
            font-size: 1.4rem;
            margin-bottom: 15px;
            color: var(--primary-color);
            line-height: 1.4;
        }
        
        .article-content p {
            color: #718096;
            margin-bottom: 20px;
            line-height: 1.6;
        }
        
        .read-more {
            color: var(--secondary-color);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
        }
        
        .read-more i {
            margin-left: 5px;
            transition: var(--transition);
        }
        
        .read-more:hover i {
            transform: translateX(5px);
        }
        
        /* 分页 */
        .pagination {
            display: flex;
            justify-content: center;
            margin-top: 40px;
        }
        
        .page-num {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 5px;
            border-radius: 5px;
            background-color: var(--gray-color);
            color: var(--dark-color);
            font-weight: 600;
            transition: var(--transition);
        }
        
        .page-num.active, .page-num:hover {
            background-color: var(--secondary-color);
            color: var(--primary-color);
        }
        
        /* 热门文章侧边栏 */
        .knowledge-sidebar {
            padding: 80px 0;
            background-color: var(--gray-color);
        }
        
        .sidebar-title {
            font-size: 1.8rem;
            color: var(--primary-color);
            margin-bottom: 30px;
            padding-bottom: 15px;
            border-bottom: 2px solid var(--secondary-color);
        }
        
        .popular-articles {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        
        .popular-article {
            display: flex;
            background-color: white;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
            transition: var(--transition);
        }
        
        .popular-article:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        }
        
        .popular-article-image {
            width: 100px;
            height: 100px;
            flex-shrink: 0;
            overflow: hidden;
        }
        
        .popular-article-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        
        .popular-article:hover .popular-article-image img {
            transform: scale(1.1);
        }
        
        .popular-article-content {
            padding: 15px;
            flex: 1;
        }
        
        .popular-article-content h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
            color: var(--primary-color);
        }
        
        .popular-article-meta {
            font-size: 0.8rem;
            color: #718096;
            display: flex;
            align-items: center;
        }
        
        .popular-article-meta i {
            margin-right: 5px;
        }
        
        /* 问答区域 */
        .faq-section {
            padding: 80px 0;
            background-color: white;
        }
        
        .faq-item {
            margin-bottom: 30px;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        
        .faq-question {
            padding: 20px;
            background-color: var(--primary-color);
            color: white;
            font-size: 1.2rem;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .faq-question i {
            transition: var(--transition);
        }
        
        .faq-question.active i {
            transform: rotate(180deg);
        }
        
        .faq-answer {
            padding: 0;
            max-height: 0;
            overflow: hidden;
            transition: var(--transition);
            background-color: white;
        }
        
        .faq-answer.active {
            padding: 20px;
            max-height: 300px;
        }
        
        /* 按钮样式 */
        .btn {
            display: inline-block;
            padding: 12px 30px;
            background-color: var(--secondary-color);
            color: var(--primary-color);
            border-radius: 5px;
            font-weight: 600;
            transition: var(--transition);
        }
        
        .btn:hover {
            background-color: #c6990f;
            transform: translateY(-2px);
        }
        
        /* 广告区 */
        .cta {
            padding: 80px 0;
            background: linear-gradient(to right, var(--primary-color), var(--accent-color));
            color: white;
            text-align: center;
        }
        
        .cta h2 {
            font-size: 2.5rem;
            margin-bottom: 20px;
        }
        
        .cta p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto 30px;
        }
                /* 响应式设计 */
        @media (max-width: 992px) {
            .header-container {
                flex-direction: column;
                padding: 15px 20px;
            }
            
            nav ul {
                margin: 15px 0;
            }
            
            .page-header {
                margin-top: 130px;
            }
        }
        
        @media (max-width: 768px) {
            nav ul {
                flex-wrap: wrap;
                justify-content: center;
            }
            
            nav ul li {
                margin: 5px 10px;
            }
            
            .section-title h2 {
                font-size: 2rem;
            }
            
            .page-header h1 {
                font-size: 2.2rem;
            }
            
            .articles-grid {
                grid-template-columns: 1fr;
            }
        }
        
        @media (max-width: 576px) {
            .page-header {
                padding: 40px 0;
            }
            
            .page-header h1 {
                font-size: 1.8rem;
            }
            
            .page-header p {
                font-size: 1rem;
            }
            
            .footer-content {
                flex-direction: column;
            }
        }