/* ====== 知识库页面独享CSS ====== */
        
        /* 知识库英雄区域 */
        .knowledge-hero {
            height: 60vh;
            min-height: 500px;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
            background: linear-gradient(135deg, var(--primary) 0%, var(--dark) 100%);
            color: white;
            margin-top: 80px;
        }
        
        .knowledge-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><rect width="100" height="100" fill="none"/><path d="M0,50 Q25,30 50,50 T100,50" stroke="rgba(255,255,255,0.05)" stroke-width="1" fill="none"/></svg>');
            opacity: 0.3;
        }
        
        .knowledge-hero-content {
            width: 100%;
            text-align: center;
            position: relative;
            z-index: 2;
        }
        
        .knowledge-hero h1 {
            color: white;
            margin-bottom: 1.5rem;
        }
        
        .knowledge-hero p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto 2.5rem;
        }
        
        /* 知识库分类筛选 */
        .knowledge-categories {
            background-color: white;
            padding: 2rem 0;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            position: sticky;
            top: 80px;
            z-index: 100;
        }
        
        .category-filters {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 1rem;
        }
        
        .category-filter {
            padding: 0.8rem 2rem;
            background-color: transparent;
            border: 2px solid var(--primary);
            border-radius: 50px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        
        .category-filter.active,
        .category-filter:hover {
            background-color: var(--primary);
            color: white;
            transform: translateY(-3px);
            box-shadow: var(--shadow-sm);
        }
        
        /* 知识库文章网格 */
        .knowledge-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
            gap: 2.5rem;
            margin-top: 3rem;
        }
        
        .knowledge-article {
            background: white;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        
        .knowledge-article:hover {
            transform: translateY(-15px);
            box-shadow: var(--shadow-lg);
        }
        
        .article-thumbnail {
            height: 220px;
            width: 100%;
            position: relative;
            overflow: hidden;
        }
        
        .article-thumbnail img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        
        .knowledge-article:hover .article-thumbnail img {
            transform: scale(1.05);
        }
        
        .article-thumbnail::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(to right, rgba(255,107,107,0.3), rgba(78,205,196,0.3));
            opacity: 0;
            transition: var(--transition);
            z-index: 1;
        }
        
        .knowledge-article:hover .article-thumbnail::before {
            opacity: 1;
        }
        
        .article-category {
            position: absolute;
            top: 1.5rem;
            left: 1.5rem;
            background-color: var(--secondary);
            color: white;
            padding: 0.5rem 1rem;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            z-index: 2;
        }
        
        .article-content {
            padding: 2rem;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        
        /* 知识库H3链接样式 - 无下划线 */
        .article-content h3 a {
            text-decoration: none;
            color: var(--primary);
            transition: var(--transition);
            display: block;
        }
        
        .article-content h3 a:hover {
            color: var(--secondary);
        }
        
        .article-excerpt {
            margin-bottom: 1.5rem;
            flex-grow: 1;
        }
        
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: auto;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(141, 153, 174, 0.2);
        }
        
        .read-more {
            color: var(--secondary);
            font-weight: 700;
            display: inline-flex;
            align-items: center;
        }
        
        .read-more i {
            margin-left: 8px;
            transition: var(--transition);
        }
        
        .read-more:hover i {
            transform: translateX(5px);
        }
        
        /* 分页样式 */
        .pagination {
            display: flex;
            justify-content: center;
            align-items: center;
            margin-top: 5rem;
            gap: 0.5rem;
        }
        
        .page-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 50px;
            height: 50px;
            border-radius: 12px;
            font-weight: 700;
            background-color: white;
            color: var(--primary);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        
        .page-num:hover {
            transform: translateY(-5px);
            background-color: var(--primary);
            color: white;
        }
        
        .page-num-current {
            background-color: var(--secondary);
            color: white;
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(255, 107, 107, 0.3);
        }
        
        .page-num-current:hover {
            background-color: var(--secondary);
            transform: translateY(-5px);
        }
        
        /* 响应式设计 */
        @media (max-width: 1200px) {
            .knowledge-grid {
                grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            }
        }
        
        @media (max-width: 992px) {
            .knowledge-hero {
                height: 50vh;
                min-height: 400px;
                margin-top: 70px;
            }
            
            .knowledge-categories {
                top: 70px;
            }
        }
        
        @media (max-width: 768px) {
            .container {
                padding: 0 1.5rem;
            }
            
            section {
                padding: 4rem 0;
            }
            
            .section-title .title-bg {
                font-size: 4rem;
                top: -2rem;
            }
            
            .nav-menu {
                position: fixed;
                top: 0;
                right: -100%;
                width: 80%;
                height: 100vh;
                flex-direction: column;
                background-color: white;
                padding: 6rem 2rem 2rem;
                transition: var(--transition);
                box-shadow: var(--shadow-lg);
                z-index: 1000;
            }
            
            .nav-menu.active {
                right: 0;
            }
            
            .mobile-menu-btn {
                display: block;
            }
            
            .phone-link {
                display: none;
            }
            
            .knowledge-grid {
                grid-template-columns: 1fr;
            }
            
            .category-filters {
                gap: 0.8rem;
            }
            
            .category-filter {
                padding: 0.6rem 1.5rem;
                font-size: 0.9rem;
            }
        }
        
        @media (max-width: 576px) {
            h1 {
                font-size: 2.5rem;
            }
            
            h2 {
                font-size: 2rem;
            }
            
            .section-title .title-bg {
                font-size: 3rem;
            }
            
            .knowledge-hero {
                height: 40vh;
                min-height: 350px;
            }
            
            .page-num {
                width: 40px;
                height: 40px;
                font-size: 0.9rem;
            }
        }