/* ====== 独享CSS部分 - 知识库页面（无侧边栏） ====== */
        
        /* 主内容区域 */
        .main-content {
            margin-top: 80px;
        }
        
        /* 页面标题区域 */
        .page-hero {
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            color: var(--white);
            padding: 120px 0 80px;
            position: relative;
            overflow: hidden;
        }
        
        .page-hero::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 40%;
            height: 100%;
            background: linear-gradient(135deg, rgba(0, 168, 232, 0.2) 0%, transparent 100%);
            clip-path: polygon(25% 0%, 100% 0%, 100% 100%, 0% 100%);
        }
        
        .page-hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
        }
        
        .page-hero-content h1 {
            font-size: 56px;
            margin-bottom: 20px;
            line-height: 1.1;
        }
        
        .page-hero-content p {
            font-size: 20px;
            opacity: 0.9;
            line-height: 1.7;
            margin-bottom: 30px;
        }
        
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 16px;
            margin-bottom: 40px;
        }
        
        .breadcrumb a {
            color: rgba(255, 255, 255, 0.8);
            transition: var(--transition);
        }
        
        .breadcrumb a:hover {
            color: var(--white);
        }
        
        .breadcrumb i {
            font-size: 14px;
            opacity: 0.7;
        }
        
        .breadcrumb .current {
            color: var(--accent);
            font-weight: 600;
        }
        
        /* 知识库筛选器 */
        .knowledge-filter {
            background-color: var(--white);
            padding: 30px;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            margin-top: -40px;
            position: relative;
            z-index: 10;
        }
        
        .filter-title {
            font-size: 20px;
            color: var(--primary);
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .filter-options {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
        }
        
        .filter-btn {
            padding: 10px 24px;
            background-color: var(--light);
            color: var(--dark);
            border-radius: 50px;
            font-weight: 500;
            font-size: 15px;
            transition: var(--transition);
            border: 2px solid transparent;
            cursor: pointer;
        }
        
        .filter-btn:hover, .filter-btn.active {
            background-color: var(--accent);
            color: var(--white);
            border-color: var(--accent);
        }
        
        /* 知识库内容区域 */
        .knowledge-content-section {
            background-color: var(--white);
            padding: 100px 0;
        }
        
        /* 搜索框 */
        .knowledge-search {
            max-width: 600px;
            margin: 0 auto 60px;
        }
        
        .search-box {
            position: relative;
        }
        
        .search-box input {
            width: 100%;
            padding: 16px 24px 16px 56px;
            border-radius: 50px;
            border: 2px solid var(--light-gray);
            background-color: var(--white);
            font-size: 16px;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        
        .search-box input:focus {
            outline: none;
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(0, 168, 232, 0.1);
        }
        
        .search-box i {
            position: absolute;
            left: 24px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--gray);
            font-size: 18px;
        }
        
        /* 文章列表 */
        .article-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 40px;
            margin-bottom: 60px;
        }
        
        .article-card {
            background-color: var(--white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            transition: var(--transition);
            border: 1px solid var(--light-gray);
            opacity: 0;
            transform: translateY(30px);
            display: flex;
            flex-direction: column;
            height: 100%;
        }
        
        .article-card.visible {
            opacity: 1;
            transform: translateY(0);
        }
        
        .article-card:hover {
            transform: translateY(-10px);
            box-shadow: var(--shadow-lg);
        }
        
        /* 文章缩略图 */
        .article-thumbnail {
            width: 100%;
            height: 220px;
            overflow: hidden;
            position: relative;
        }
        
        .article-thumbnail img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        
        .article-card:hover .article-thumbnail img {
            transform: scale(1.05);
        }
        
        .article-category {
            position: absolute;
            top: 20px;
            left: 20px;
            background-color: rgba(0, 168, 232, 0.9);
            color: var(--white);
            padding: 6px 15px;
            border-radius: 50px;
            font-size: 12px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        
        /* 文章内容 */
        .article-content {
            padding: 30px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        
        .article-title {
            font-size: 22px;
            color: var(--primary);
            margin-bottom: 15px;
            line-height: 1.3;
        }
        
        /* H3标签链接样式 - 无下划线 */
        .article-title a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        
        .article-title a:hover {
            color: var(--accent);
        }
        
        .article-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            color: var(--gray);
            font-size: 14px;
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        
        .meta-item {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        .meta-item i {
            color: var(--accent);
            font-size: 14px;
        }
        
        .article-excerpt {
            color: var(--gray);
            font-size: 16px;
            line-height: 1.7;
            margin-bottom: 20px;
            flex: 1;
        }
        
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 25px;
        }
        
        .article-tag {
            display: inline-block;
            background-color: var(--light);
            color: var(--dark);
            padding: 5px 12px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 500;
            transition: var(--transition);
        }
        
        .article-tag:hover {
            background-color: var(--accent);
            color: var(--white);
        }
        
        .article-footer {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 20px;
            border-top: 1px solid var(--light-gray);
        }
        
        .read-more {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--accent);
            font-weight: 600;
            font-size: 15px;
            transition: var(--transition);
        }
        
        .read-more:hover {
            gap: 12px;
        }
        
        .article-views {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--gray);
            font-size: 14px;
        }
        
        /* 分页 */
        .pagination-section {
            margin-top: 60px;
        }
        
        .pagination {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }
        
        .page-num {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: var(--radius);
            background-color: var(--light);
            color: var(--dark);
            font-weight: 600;
            font-size: 16px;
            transition: var(--transition);
        }
        
        .page-num:hover {
            background-color: var(--accent);
            color: var(--white);
        }
        
        .page-num-current {
            background-color: var(--accent);
            color: var(--white);
            box-shadow: 0 4px 12px rgba(0, 168, 232, 0.3);
        }
        
        .page-num i {
            font-size: 14px;
        }
        
        /* 分类标签区域 */
        .category-tags {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 15px;
            margin: 30px 0 60px;
        }
        
        .category-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: var(--light);
            color: var(--dark);
            padding: 10px 20px;
            border-radius: 50px;
            font-weight: 500;
            font-size: 15px;
            transition: var(--transition);
        }
        
        .category-tag:hover {
            background-color: var(--accent);
            color: var(--white);
        }
        
        .category-tag i {
            color: var(--accent);
            transition: var(--transition);
        }
        
        .category-tag:hover i {
            color: var(--white);
        }
        
        .category-tag.active {
            background-color: var(--accent);
            color: var(--white);
        }
        
        .category-tag.active i {
            color: var(--white);
        }
        
        /* 热门标签云 */
        .tag-cloud-section {
            background-color: var(--light);
            padding: 60px 0;
            margin: 60px 0;
            border-radius: var(--radius-lg);
        }
        
        .tag-cloud-title {
            text-align: center;
            font-size: 24px;
            color: var(--primary);
            margin-bottom: 40px;
        }
        
        .tag-cloud {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 15px;
            max-width: 800px;
            margin: 0 auto;
        }
        
        .tag-cloud a {
            display: inline-block;
            background-color: var(--white);
            color: var(--dark);
            padding: 10px 20px;
            border-radius: 50px;
            font-size: 15px;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        
        .tag-cloud a:hover {
            background-color: var(--accent);
            color: var(--white);
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        
        /* CTA区域 */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            color: var(--white);
            padding: 100px 0;
            text-align: center;
        }
        
        .cta-content {
            max-width: 800px;
            margin: 0 auto;
        }
        
        .cta-content h2 {
            font-size: 42px;
            margin-bottom: 20px;
            color: var(--white);
        }
        
        .cta-content p {
            font-size: 20px;
            opacity: 0.9;
            margin-bottom: 40px;
            line-height: 1.7;
        }
        
        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 20px;
        }
        
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 16px 32px;
            font-weight: 600;
            font-size: 16px;
            border-radius: var(--radius);
            transition: var(--transition);
            cursor: pointer;
            border: none;
            outline: none;
            gap: 10px;
        }
        
        .btn-primary {
            background-color: var(--accent);
            color: var(--white);
            box-shadow: 0 4px 12px rgba(0, 168, 232, 0.3);
        }
        
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(0, 168, 232, 0.4);
            background-color: #0097d1;
        }
        
        .btn-secondary {
            background-color: transparent;
            color: var(--white);
            border: 2px solid rgba(255, 255, 255, 0.3);
        }
        
        .btn-secondary:hover {
            border-color: var(--white);
            transform: translateY(-3px);
            background-color: rgba(255, 255, 255, 0.1);
        }
        
        /* 响应式 */
        @media (max-width: 1200px) {
            .article-list {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        
        @media (max-width: 992px) {
            .article-list {
                grid-template-columns: 1fr;
                max-width: 600px;
                margin-left: auto;
                margin-right: auto;
            }
        }
        
        @media (max-width: 768px) {
            .page-hero {
                padding: 100px 0 60px;
            }
            
            .page-hero-content h1 {
                font-size: 36px;
            }
            
            .page-hero-content p {
                font-size: 18px;
            }
            
            .filter-options {
                flex-direction: column;
                align-items: flex-start;
            }
            
            .filter-btn {
                width: 100%;
                text-align: center;
            }
            
            .article-content {
                padding: 20px;
            }
            
            .article-title {
                font-size: 20px;
            }
            
            .article-meta {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
            
            .article-thumbnail {
                height: 200px;
            }
            
            .category-tags {
                justify-content: flex-start;
                overflow-x: auto;
                padding-bottom: 10px;
                margin: 20px 0 40px;
            }
            
            .category-tag {
                flex-shrink: 0;
            }
            
            .cta-content h2 {
                font-size: 32px;
            }
            
            .cta-content p {
                font-size: 18px;
            }
            
            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }
            
            .btn {
                width: 100%;
                max-width: 300px;
            }
        }
        
        @media (max-width: 576px) {
            .article-thumbnail {
                height: 180px;
            }
            
            .tag-cloud a {
                padding: 8px 16px;
                font-size: 14px;
            }
        }
        
        /* ====== 独享CSS结束 ====== */