/* 新闻资讯基础样式 - 所有样式都添加.card-section前缀，避免影响其他区域 */
    .card-section {
        max-width: 1500px;
        margin: 0 auto;
        padding: 20px;
    }

    /* 导航栏样式 - 增加命名空间 */
    .card-section .card-nav {
        display: flex;
        border-bottom: 2px solid #e0e0e0;
        margin-bottom: 20px;
        padding-bottom: 5px;
    }

    .card-section .card-nav-item {
        position: relative;
        padding: 10px 25px;
        cursor: pointer;
        margin-right: 5px;
        background-color: #f8f8f8;
        border-radius: 5px 5px 0 0;
        transition: all 0.3s ease;
        font-weight: 500;
        color: #333;
    }

    .card-section .card-nav-item:hover,
    .card-section .card-nav-item.active {
        background-color: #e8e8e8;
    }

    /* 悬停提示框样式 */
    .card-section .card-tooltip {
        opacity: 0;
        visibility: hidden;
        position: absolute;
        top: calc(100% + 10px);
        left: 0;
        background-color: #fff;
        border: 1px solid #ddd;
        padding: 15px;
        width: 280px;
        box-shadow: 0 8px 16px rgba(0,0,0,0.1);
        border-radius: 6px;
        z-index: 10;
        transition: all 0.3s ease;
        transform: translateY(10px);
    }

    .card-section .card-nav-item:hover .card-tooltip {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .card-section .card-tooltip::before {
        content: '';
        position: absolute;
        bottom: 100%;
        left: 20px;
        border-width: 8px;
        border-style: solid;
        border-color: transparent transparent #ddd transparent;
    }

    .card-section .card-tooltip::after {
        content: '';
        position: absolute;
        bottom: 100%;
        left: 20px;
        border-width: 7px;
        border-style: solid;
        border-color: transparent transparent #fff transparent;
    }

    /* 卡片容器 - 使用网格布局实现独立分区 */
    .card-section .cards-container {
        display: grid;
        grid-template-columns: 1fr;
        gap: 20px;
        margin-top: 20px;
    }

    /* 单个卡片样式 - 每个卡片独立置顶显示 */
    .card-section .single-card {
        display: none; /* 默认隐藏所有卡片 */
        border: 1px solid #e0e0e0;
        border-radius: 8px;
        background-color: #f9f9f9;
        box-shadow: 0 2px 5px rgba(0,0,0,0.05);
        padding: 20px;
        opacity: 0;
        transform: translateY(10px);
        transition: all 0.5s ease;
    }

    /* 激活状态的卡片 - 置顶显示 */
    .card-section .single-card.active {
        display: block;
        opacity: 1;
        transform: translateY(0);
    }

    /* 标题和内容样式 */
    .card-section .single-card h3 {
        margin-top: 0;
        color: #2c3e50;
        border-bottom: 1px solid #eee;
        padding-bottom: 10px;
    }

    .card-section .single-card p {
        line-height: 1.6;
        color: #555;
    }

    /* 按钮样式 */
    .card-section .card-button {
        background-color: #3498db;
        color: white;
        border: none;
        padding: 10px 15px;
        border-radius: 4px;
        cursor: pointer;
        transition: all 0.3s ease;
        margin-top: 15px;
    }

    .card-section .card-button:hover {
        background-color: #2980b9;
        transform: translateY(-2px);
        box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    }

    /* 图片样式 */
    .card-section .single-card img {
        border-radius: 6px;
        transition: all 0.3s ease;
    }

    .card-section .single-card img:hover {
        transform: scale(1.02);
        box-shadow: 0 8px 16px rgba(0,0,0,0.1);
    }

    /* 内容区域两栏布局 */
    .card-section .card-content-layout {
        display: flex;
        gap: 30px;
    }
    
    .card-section .card-left-column {
        flex: 1;
    }
    
    .card-section .card-right-column {
        flex: 1;
    }
    
    .card-section .card-featured-image {
        margin-bottom: 15px;
    }
    
    .card-section .card-featured-image img {
        width: 100%;
        height: auto;
    }
    
    .card-section .card-article-list {
        margin: 0;
        padding: 0;
        list-style: none;
    }
    
    .card-section .card-article-list li {
        margin-bottom: 20px;
        padding-bottom: 20px;
        border-bottom: 1px dashed #eee;
    }
    
    .card-section .card-article-list li:last-child {
        border-bottom: none;
        margin-bottom: 0;
        padding-bottom: 0;
    }
    
    .card-section .card-article-list h4 {
        margin: 0 0 8px;
        color: #3498db;
        transition: color 0.3s;
    }
    
    .card-section .card-article-list h4:hover {
        color: #2980b9;
        cursor: pointer;
    }
    
    .card-section .card-article-list p {
        margin: 0;
        color: #777;
        font-size: 0.95em;
    }
    
    .card-section .card-article-date {
        display: block;
        margin-bottom: 8px;
        color: #999;
        font-size: 0.85em;
    }

    /* 响应式调整 */
    @media (max-width: 768px) {
        .card-section .card-content-layout {
            flex-direction: column;
        }
        
        .card-section .card-nav {
            flex-wrap: wrap;
        }
        
        .card-section .card-nav-item {
            padding: 8px 15px;
            margin-bottom: 5px;
        }
    }