/* 独享CSS部分 - 知识库页面 */
        .page-header {
            background: linear-gradient(135deg, var(--primary-color) 0%, #2c5282 100%);
            color: var(--light-color);
            padding: 150px 0 80px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .page-header::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" width="100" height="100" opacity="0.1"><path d="M30,30 Q50,10 70,30 T90,50 T70,70 T50,90 T30,70 T10,50 T30,30 Z" fill="none" stroke="%23d4af37" stroke-width="2"/></svg>');
        }

        .page-header h1 {
            font-size: 3.5rem;
            margin-bottom: 20px;
            position: relative;
        }

        .page-header p {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto;
            position: relative;
        }

        /* 知识库筛选 */
        .knowledge-filter {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 15px;
            margin-bottom: 50px;
        }

        .filter-btn {
            padding: 10px 25px;
            background: var(--light-color);
            border: 2px solid var(--primary-color);
            border-radius: 30px;
            color: var(--primary-color);
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }

        .filter-btn.active, .filter-btn:hover {
            background: var(--primary-color);
            color: var(--light-color);
        }

        /* 知识库文章列表 */
        .knowledge-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
            gap: 30px;
            margin-bottom: 60px;
        }

        .knowledge-item {
            background: var(--light-color);
            border-radius: 10px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            transform: translateY(30px);
            opacity: 0;
        }

        .knowledge-item.animated {
            transform: translateY(0);
            opacity: 1;
        }

        .knowledge-item:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }

        .knowledge-image {
            height: 200px;
            overflow: hidden;
            position: relative;
        }

        .knowledge-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

        .knowledge-item:hover .knowledge-image img {
            transform: scale(1.1);
        }

        .knowledge-category {
            position: absolute;
            top: 15px;
            left: 15px;
            background: var(--secondary-color);
            color: var(--primary-color);
            padding: 5px 12px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
        }

        .knowledge-content {
            padding: 25px;
        }

        .knowledge-content h3 {
            font-size: 1.4rem;
            margin-bottom: 15px;
            color: var(--primary-color);
            transition: var(--transition);
            /* 去除链接下划线 */
            text-decoration: none;
            border-bottom: none;
        }

        .knowledge-content h3 a {
            color: inherit;
            text-decoration: none;
            border-bottom: none;
        }

        .knowledge-content h3 a:hover {
            color: var(--secondary-color);
        }

        .knowledge-content p {
            color: #666;
            margin-bottom: 20px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .knowledge-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.9rem;
            color: #888;
        }

        .knowledge-date {
            display: flex;
            align-items: center;
        }

        .knowledge-date i {
            margin-right: 5px;
        }

        .read-more {
            color: var(--secondary-color);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            transition: var(--transition);
        }

        .read-more i {
            margin-left: 5px;
            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: 50px;
            gap: 10px;
        }

        .page-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: var(--light-color);
            color: var(--primary-color);
            border-radius: 4px;
            font-weight: 600;
            transition: var(--transition);
            box-shadow: var(--shadow);
        }

        .page-num:hover, .page-num.page-num-current {
            background: var(--primary-color);
            color: var(--light-color);
        }

        .page-num.page-num-current {
            background: var(--secondary-color);
            color: var(--primary-color);
        }

        /* 知识库侧边栏 */
        .knowledge-sidebar {
            background: var(--light-color);
            border-radius: 10px;
            padding: 30px;
            box-shadow: var(--shadow);
            margin-bottom: 30px;
        }

        .sidebar-title {
            font-size: 1.3rem;
            color: var(--primary-color);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--secondary-color);
        }

        .sidebar-list li {
            margin-bottom: 15px;
            padding-bottom: 15px;
            border-bottom: 1px solid #eee;
        }

        .sidebar-list li:last-child {
            margin-bottom: 0;
            padding-bottom: 0;
            border-bottom: none;
        }

        .sidebar-list a {
            color: var(--text-color);
            transition: var(--transition);
            display: flex;
            align-items: center;
        }

        .sidebar-list a:hover {
            color: var(--secondary-color);
            padding-left: 5px;
        }

        .sidebar-list i {
            margin-right: 10px;
            color: var(--secondary-color);
        }

        /* 热门标签 */
        .tags-container {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 20px;
        }

        .tag {
            background: #f1f5f9;
            color: var(--primary-color);
            padding: 5px 12px;
            border-radius: 20px;
            font-size: 0.8rem;
            transition: var(--transition);
        }

        .tag:hover {
            background: var(--secondary-color);
            color: var(--primary-color);
        }

        /* 响应式设计 */
        @media screen and (max-width: 992px) {
            .footer-content {
                grid-template-columns: repeat(2, 1fr);
            }

            .knowledge-list {
                grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            }
        }

        @media screen and (max-width: 768px) {
            .hamburger {
                display: block;
            }

            .hamburger.active .bar:nth-child(2) {
                opacity: 0;
            }

            .hamburger.active .bar:nth-child(1) {
                transform: translateY(8px) rotate(45deg);
            }

            .hamburger.active .bar:nth-child(3) {
                transform: translateY(-8px) rotate(-45deg);
            }

            .nav-menu {
                position: fixed;
                left: -100%;
                top: 70px;
                gap: 0;
                flex-direction: column;
                background: var(--primary-color);
                width: 100%;
                text-align: center;
                transition: 0.3s;
                box-shadow: 0 10px 10px rgba(0,0,0,0.1);
                padding: 20px 0;
            }

            .nav-menu.active {
                left: 0;
            }

            .nav-item {
                margin: 15px 0;
            }

            .page-header h1 {
                font-size: 2.5rem;
            }

            .section-title h2 {
                font-size: 2rem;
            }

            .knowledge-list {
                grid-template-columns: 1fr;
            }
        }

        @media screen and (max-width: 576px) {
            .footer-content {
                grid-template-columns: 1fr;
            }

            .pagination {
                flex-wrap: wrap;
            }
        }