/* ========== 独享CSS部分 - 知识库页面 ========== */
        
        /* 知识库页面头部 */
        .knowledge-header {
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            padding: 120px 0 80px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        
        .knowledge-header:before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 40%;
            height: 100%;
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            opacity: 0.05;
            clip-path: polygon(100% 0, 0% 100%, 100% 100%);
        }
        
        .knowledge-header h1 {
            font-size: 3.5rem;
            color: var(--dark);
            margin-bottom: 20px;
            position: relative;
            z-index: 2;
        }
        
        .knowledge-header h1 span {
            color: var(--primary);
        }
        
        .knowledge-header p {
            font-size: 1.2rem;
            color: var(--gray);
            max-width: 800px;
            margin: 0 auto 30px;
            position: relative;
            z-index: 2;
        }
        
        /* 知识分类导航 */
        .knowledge-nav {
            background-color: white;
            padding: 20px 0;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
            position: sticky;
            top: 70px; /* 与顶部导航高度匹配 */
            z-index: 998;
            border-top: 1px solid var(--light-gray);
        }
        
        .knowledge-nav-list {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 10px;
        }
        
        .knowledge-nav-list a {
            padding: 10px 20px;
            border-radius: 30px;
            background-color: var(--light-gray);
            color: var(--dark);
            font-weight: 500;
            transition: var(--transition);
        }
        
        .knowledge-nav-list a:hover,
        .knowledge-nav-list a.active {
            background-color: var(--primary);
            color: white;
        }
        
        /* 知识库内容区域 */
        .knowledge-content {
            padding: 80px 0;
            background-color: var(--light);
        }
        
        .knowledge-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
            gap: 40px;
            margin-bottom: 60px;
        }
        
        .knowledge-card {
            background-color: white;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid var(--light-gray);
            height: 100%;
        }
        
        .knowledge-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
            border-color: var(--primary);
        }
        
        .knowledge-image {
            height: 220px;
            overflow: hidden;
        }
        
        .knowledge-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        
        .knowledge-card:hover .knowledge-image img {
            transform: scale(1.1);
        }
        
        .knowledge-info {
            padding: 25px;
        }
        
        /* 知识库H3标题链接 - 修复：不要有横线 */
        .knowledge-info h3 {
            font-size: 1.4rem;
            color: var(--dark);
            margin-bottom: 15px;
        }
        
        .knowledge-info h3 a {
            color: var(--dark);
            transition: var(--transition);
            /* 确保没有下划线 */
            text-decoration: none !important;
            border-bottom: none !important;
        }
        
        .knowledge-info h3 a:hover {
            color: var(--primary);
        }
        
        .knowledge-meta {
            display: flex;
            align-items: center;
            margin-bottom: 15px;
            color: var(--gray);
            font-size: 0.9rem;
        }
        
        .knowledge-category {
            display: inline-block;
            background-color: rgba(0, 102, 204, 0.1);
            color: var(--primary);
            padding: 4px 12px;
            border-radius: 30px;
            font-size: 0.8rem;
            font-weight: 500;
            margin-right: 15px;
        }
        
        .knowledge-date {
            display: flex;
            align-items: center;
        }
        
        .knowledge-date i {
            margin-right: 5px;
            font-size: 0.9rem;
        }
        
        .knowledge-info p {
            color: var(--gray);
            margin-bottom: 20px;
            line-height: 1.7;
            font-size: 0.95rem;
        }
        
        .read-more {
            color: var(--primary);
            font-weight: 600;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
        }
        
        .read-more i {
            margin-left: 5px;
            transition: var(--transition);
        }
        
        .read-more:hover i {
            transform: translateX(5px);
        }
        
        /* 热门知识板块 */
        .popular-knowledge {
            background-color: white;
            padding: 80px 0;
        }
        
        .popular-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 30px;
        }
        
        .popular-item {
            display: flex;
            align-items: flex-start;
            padding: 20px;
            background-color: var(--light);
            border-radius: var(--border-radius);
            transition: var(--transition);
            border: 1px solid var(--light-gray);
        }
        
        .popular-item:hover {
            transform: translateY(-5px);
            border-color: var(--primary);
            background-color: rgba(0, 102, 204, 0.02);
        }
        
        .popular-number {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
            font-weight: 700;
            font-size: 1.2rem;
            border-radius: 8px;
            margin-right: 15px;
            flex-shrink: 0;
        }
        
        .popular-content h4 {
            font-size: 1.1rem;
            color: var(--dark);
            margin-bottom: 8px;
        }
        
        .popular-content h4 a {
            color: var(--dark);
            transition: var(--transition);
            /* 确保没有下划线 */
            text-decoration: none !important;
            border-bottom: none !important;
        }
        
        .popular-content h4 a:hover {
            color: var(--primary);
        }
        
        .popular-content p {
            color: var(--gray);
            font-size: 0.9rem;
            line-height: 1.6;
        }
        
        /* 分页样式 */
        .pagination {
            display: flex;
            justify-content: center;
            align-items: center;
            margin-top: 60px;
            gap: 8px;
        }
        
        .page-num {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: var(--border-radius);
            background-color: white;
            color: var(--dark);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            border: 1px solid var(--light-gray);
        }
        
        .page-num:hover {
            background-color: var(--primary);
            color: white;
            border-color: var(--primary);
            transform: translateY(-2px);
        }
        
        .page-num-current {
            background-color: var(--primary);
            color: white;
            border-color: var(--primary);
        }
        
        .page-num i {
            font-size: 0.9rem;
        }
        
        /* 侧边栏样式（知识库页面独有） */
        .knowledge-sidebar {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 30px;
            box-shadow: var(--shadow);
            border: 1px solid var(--light-gray);
            margin-bottom: 30px;
        }
        
        .sidebar-title {
            font-size: 1.3rem;
            color: var(--dark);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--light-gray);
        }
        
        .sidebar-links {
            margin-bottom: 25px;
        }
        
        .sidebar-links li {
            margin-bottom: 12px;
        }
        
        .sidebar-links a {
            display: flex;
            align-items: center;
            color: var(--gray);
            transition: var(--transition);
            padding: 8px 0;
        }
        
        .sidebar-links a:hover {
            color: var(--primary);
            padding-left: 5px;
        }
        
        .sidebar-links a i {
            margin-right: 10px;
            color: var(--primary);
            font-size: 0.9rem;
        }
        
        /* 知识库搜索框 */
        .knowledge-search {
            position: relative;
            margin-bottom: 30px;
        }
        
        .knowledge-search input {
            width: 100%;
            padding: 12px 15px 12px 45px;
            border-radius: var(--border-radius);
            border: 1px solid var(--light-gray);
            font-family: 'Inter', sans-serif;
            font-size: 0.95rem;
            transition: var(--transition);
        }
        
        .knowledge-search input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
        }
        
        .knowledge-search i {
            position: absolute;
            left: 15px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--gray);
            font-size: 1rem;
        }
        
        /* 动画效果 */
        .animate-on-scroll {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.8s ease, transform 0.8s ease;
        }
        
        .animate-on-scroll.animated {
            opacity: 1;
            transform: translateY(0);
        }
        
        /* ========== 响应式设计 ========== */
        @media (max-width: 992px) {
            .knowledge-header h1 {
                font-size: 2.8rem;
            }
            
            .knowledge-grid {
                grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
                gap: 30px;
            }
            
            .popular-grid {
                grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            }
        }
        
        @media (max-width: 768px) {
            .mobile-toggle {
                display: block;
            }
            
            .nav-menu {
                position: fixed;
                top: 90px;
                left: 0;
                width: 100%;
                background-color: white;
                flex-direction: column;
                padding: 20px;
                box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
                transform: translateY(-100%);
                opacity: 0;
                transition: var(--transition);
                z-index: 999;
            }
            
            .nav-menu.active {
                transform: translateY(0);
                opacity: 1;
            }
            
            .nav-menu li {
                margin: 0 0 15px 0;
            }
            
            /* 移动端调整导航位置 */
            .knowledge-nav {
                top: 70px;
            }
            
            .section-padding {
                padding: 60px 0;
            }
            
            .knowledge-header {
                padding: 80px 0 60px;
            }
            
            .knowledge-header h1 {
                font-size: 2.2rem;
            }
            
            .knowledge-nav-list {
                justify-content: flex-start;
                overflow-x: auto;
                padding-bottom: 10px;
            }
            
            .knowledge-nav-list a {
                white-space: nowrap;
            }
            
            .knowledge-content {
                padding: 60px 0;
            }
            
            .knowledge-grid {
                grid-template-columns: 1fr;
            }
        }
        
        @media (max-width: 576px) {
            .knowledge-header h1 {
                font-size: 1.8rem;
            }
            
            .knowledge-header p {
                font-size: 1rem;
            }
            
            .knowledge-image {
                height: 180px;
            }
            
            .knowledge-info h3 {
                font-size: 1.2rem;
            }
            
            .popular-grid {
                grid-template-columns: 1fr;
            }
            
            .popular-item {
                padding: 15px;
            }
            
            /* 移动端调整电话链接 */
            .phone-link {
                min-width: 160px;
                padding: 10px 20px;
                font-size: 0.95rem;
            }
            
            /* 移动端调整导航位置 */
            .knowledge-nav {
                top: 60px;
            }
        }