/* 页面标题横幅 */
        .page-banner {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            padding: 160px 0 80px;
            color: var(--light-text);
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        
        .page-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none"><path d="M0,0 L100,0 L100,100 Z" fill="rgba(255,255,255,0.05)"/></svg>');
            background-size: 100% 100%;
        }
        
        .page-banner h1 {
            font-size: 3.5rem;
            margin-bottom: 20px;
            position: relative;
        }
        
        .page-banner p {
            font-size: 1.4rem;
            max-width: 800px;
            margin: 0 auto;
            opacity: 0.9;
        }
        
        /* 知识库分类 */
        .knowledge-categories {
            background: var(--light);
            padding: 40px 0;
            position: sticky;
            top: 80px;
            z-index: 999;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
        }
        
        .categories-container {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 15px;
        }
        
        .category-item {
            padding: 12px 25px;
            background: var(--light-text);
            border-radius: 50px;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.3s ease;
            border: 2px solid transparent;
        }
        
        .category-item:hover, .category-item.active {
            background: var(--primary);
            color: var(--light-text);
            border-color: var(--primary);
        }
        
        /* 知识库内容 */
        .knowledge-content {
            padding: 80px 0;
            background: #FFFFFF;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 70px;
        }
        
        .section-title h2 {
            font-size: 2.8rem;
            color: var(--primary-dark);
            margin-bottom: 15px;
        }
        
        .section-title p {
            font-size: 1.2rem;
            color: var(--text);
            max-width: 600px;
            margin: 0 auto;
        }
        
        .knowledge-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 40px;
        }
        
        .knowledge-card {
            background: var(--light-text);
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            transition: all 0.4s ease;
            display: flex;
            flex-direction: column;
            height: 100%;
        }
        
        .knowledge-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
        }
        
        .knowledge-image {
            height: 200px;
            overflow: hidden;
            position: relative;
        }
        
        .knowledge-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        
        .knowledge-card:hover .knowledge-image img {
            transform: scale(1.05);
        }
        
        .knowledge-category {
            position: absolute;
            top: 15px;
            left: 15px;
            background: var(--accent);
            color: var(--light-text);
            padding: 5px 15px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 500;
        }
        
        .knowledge-content-wrapper {
            padding: 25px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        
        .knowledge-content-wrapper h3 {
            color: var(--primary-dark);
            margin-bottom: 15px;
            font-size: 1.4rem;
            line-height: 1.4;
        }
        
        .knowledge-content-wrapper p {
            margin-bottom: 20px;
            color: var(--text);
            flex-grow: 1;
        }
        
        .knowledge-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 20px;
            padding-top: 15px;
            border-top: 1px solid var(--light);
        }
        
        .knowledge-date {
            color: var(--text);
            font-size: 0.9rem;
        }
        
        .btn {
            display: inline-flex;
            align-items: center;
            padding: 10px 20px;
            background: var(--accent);
            color: var(--primary-dark);
            border-radius: 50px;
            font-weight: 600;
            transition: all 0.3s ease;
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.4);
            font-size: 0.9rem;
        }
        
        .btn:hover {
            background: var(--accent-light);
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(245, 158, 11, 0.6);
        }
        
        .btn i {
            margin-left: 8px;
        }
        
        /* 分页样式 */
        .pagination {
            display: flex;
            justify-content: center;
            margin-top: 60px;
        }
        
        .page-num {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 5px;
            border-radius: 8px;
            background: var(--light);
            color: var(--text);
            font-weight: 500;
            transition: all 0.3s ease;
        }
        
        .page-num:hover, .page-num.active {
            background: var(--primary);
            color: var(--light-text);
        }
        
        .page-num.dots {
            background: transparent;
        }
        
        /* 热门文章 */
        .popular-articles {
            padding: 100px 0;
            background: var(--light);
        }
        
        .articles-slider {
            display: flex;
            overflow-x: auto;
            scroll-snap-type: x mandatory;
            gap: 30px;
            padding: 20px 0;
            scrollbar-width: none; /* Firefox */
        }
        
        .articles-slider::-webkit-scrollbar {
            display: none; /* Chrome, Safari */
        }
        
        .article-card {
            flex: 0 0 calc(33.333% - 20px);
            scroll-snap-align: start;
            background: var(--light-text);
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
        }
        
        .article-image {
            height: 180px;
        }
        
        .article-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        
        .article-content {
            padding: 20px;
        }
        
        .article-content h3 {
            color: var(--primary-dark);
            margin-bottom: 10px;
            font-size: 1.2rem;
        }
        
        .article-stats {
            display: flex;
            align-items: center;
            color: var(--text);
            font-size: 0.9rem;
            margin-top: 15px;
        }
        
        .article-stats i {
            margin-right: 5px;
            color: var(--accent);
        }
        
        .article-stats > div {
            margin-right: 15px;
        }
        
 
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .article-card {
                flex: 0 0 calc(50% - 15px);
            }
        }
        
        @media (max-width: 768px) {
            .menu-toggle {
                display: block;
            }
            
            .nav-menu {
                position: fixed;
                top: 80px;
                left: -100%;
                flex-direction: column;
                background: var(--primary-dark);
                width: 100%;
                text-align: center;
                transition: 0.4s;
                box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
                padding: 30px 0;
            }
            
            .nav-menu.active {
                left: 0;
            }
            
            .nav-menu li {
                margin: 20px 0;
            }
            
            .page-banner h1 {
                font-size: 2.5rem;
            }
            
            .page-banner p {
                font-size: 1.1rem;
            }
            
            .section-title h2 {
                font-size: 2.2rem;
            }
            
            .categories-container {
                flex-direction: column;
                align-items: center;
            }
            
            .category-item {
                width: 100%;
                text-align: center;
                margin-bottom: 10px;
            }
            
            .knowledge-grid {
                grid-template-columns: 1fr;
            }
            
            .article-card {
                flex: 0 0 85%;
            }
        }
        
        /* 动画效果 */
        @keyframes float {
            0%, 100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-10px);
            }
        }
        
        .floating {
            animation: float 5s ease-in-out infinite;
        }