.banner {
          background-color: #fff;
          height: 180px; /* 手机端降低高度 */
          display: flex;
          align-items: center;
          justify-content: center;
          position: relative;
          overflow: hidden;
      }
      .banner::before {
          content: "";
          position: absolute;
          inset: 0;
          background: url("") repeat;
          opacity: 0.1;
      }
      .banner h2 {
          font-size: 40px; /* 手机端缩小文字 */
          color: #3c1a1a; /* 文字颜色改为深色，手机更清晰 */
          font-weight: bold;
          letter-spacing: 6px;
          z-index: 1;
      }
  
      /* 主容器 */
      .container {
          max-width: 1200px;
          margin: 0 auto;
          padding: 20px 15px; /* 手机端小内边距 */
          display: flex;
          flex-direction: column; /* 手机端：上下排列 */
          gap: 20px;
      }
      /* 左侧菜单 - 手机端全屏 */
      .left-menu {
          width: 100%;
          flex-shrink: 0;
      }
      .menu-title {
          font-size: 18px;
          color: rgb(3, 139, 77);
          font-weight: bold;
          margin-bottom: 16px;
          padding-bottom: 8px;
          border-bottom: 2px solid rgb(3, 139, 77);
      }
      .menu-list {
          list-style: none;
          display: grid;
          grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
          gap: 8px;
      }
      .menu-list li {
          margin-bottom: 0;
      }
      .menu-list a {
          display: block;
          padding: 10px 12px;
          color: #333;
          text-decoration: none;
          font-size: 14px;
          transition: all 0.3s;
          border-left: 3px solid transparent;
          text-align: center;
      }
      .menu-list a.active {
          color: rgb(3, 139, 77);
          background-color: #f0f8f0;
          border-left-color: rgb(3, 139, 77);
      }
      .menu-list a:hover:not(.active) {
          background-color: #f8f8f8;
          color: rgb(3, 139, 77);
      }
  
      /* 右侧内容区 */
      .right-content {
          flex: 1;
          width: 100%;
      }
      /* 面包屑 */
      .breadcrumb {
          font-size: 13px;
          color: #666;
          margin-bottom: 15px;
          line-height: 1.5;
      }
      .breadcrumb a {
          color: #333;
          text-decoration: none;
      }
      .breadcrumb a:hover {
          color: rgb(3, 139, 77);
      }
      /* 内容标题 */
      .content-title {
          display: flex;
          align-items: center;
          gap: 8px;
          margin-bottom: 20px;
          flex-wrap: wrap;
      }
      .content-title h3 {
          font-size: 20px;
          color: rgb(3, 139, 77);
          font-weight: bold;
      }
      .content-title span {
          font-size: 14px;
          color: #666;
      }
  
      /* 新闻列表 - 手机端垂直布局 */
      .news-list {
          list-style: none;
      }
      .news-item {
          display: flex;
          flex-direction: column; /* 手机端：图上文字下 */
          gap: 12px;
          padding: 15px 0;
          border-bottom: 1px solid #eee;
          cursor: pointer;
      }
      .news-img {
          width: 100%;
          height: 200px;
          background-color: #f0f0f0;
          flex-shrink: 0;
          overflow: hidden;
          border-radius: 4px;
      }
      .news-img img {
          width: 100%;
          height: 100%;
          object-fit: cover;
      }
      .news-info {
          flex: 1;
      }
      .news-title-row {
          display: flex;
          flex-direction: column; /* 手机端标题和日期上下排列 */
          align-items: flex-start;
          gap: 6px;
          margin-bottom: 8px;
      }
      .news-title {
          font-size: 17px;
          color: #222;
          font-weight: 600;
          text-decoration: none;
          transition: color 0.3s;
          line-height: 1.4;
      }
      .news-title:hover {
          color: rgb(3, 139, 77);
      }
      .news-date {
          font-size: 12px;
          color: #888;
          white-space: nowrap;
      }
      .news-summary {
          font-size: 14px;
          color: #666;
          line-height: 1.6;
          display: -webkit-box;
          -webkit-line-clamp: 3;
          -webkit-box-orient: vertical;
          overflow: hidden;
      }
  
      /* 分页 */
      .pagination {
          display: flex;
          justify-content: center;
          align-items: center;
          gap: 6px;
          margin-top: 30px;
          flex-wrap: wrap;
      }
      .pagination button {
          padding: 8px 12px;
          border: 1px solid #ddd;
          background: #fff;
          color: #333;
          cursor: pointer;
          border-radius: 4px;
          transition: all 0.3s;
          font-size: 14px;
      }
      .pagination button:hover:not(:disabled) {
          background: rgb(3, 139, 77);
          color: #fff;
          border-color: rgb(3, 139, 77);
      }
      .pagination button.active {
          background: rgb(3, 139, 77);
          color: #fff;
          border-color: rgb(3, 139, 77);
      }
      .pagination button:disabled {
          color: #ccc;
          cursor: not-allowed;
      }
  
      /* 返回顶部 */
      .back-to-top {
          position: fixed;
          right: 20px;
          bottom: 20px;
          width: 44px;
          height: 44px;
          background: #009245;
          color: #fff;
          border-radius: 50%;
          display: flex;
          align-items: center;
          justify-content: center;
          cursor: pointer;
          font-size: 18px;
          z-index: 999;
      }
  
      /* =================================== */
      /* 桌面版适配（屏幕 ≥768px）*/
      /* =================================== */
      @media (min-width: 768px) {
          .header {
              padding: 12px 120px;
          }
          .banner {
              height: 300px;
          }
          .banner h2 {
              font-size: 80px;
              color: #fff;
          }
          .container {
              flex-direction: row; /* 电脑端左右布局 */
              padding: 40px 20px;
              gap: 40px;
          }
          .left-menu {
              width: 180px;
          }
          .menu-list {
              display: block;
          }
          .menu-list li {
              margin-bottom: 12px;
          }
          .menu-list a {
              text-align: left;
          }
          .news-item {
              flex-direction: row; /* 电脑端：图左文字右 */
          }
          .news-img {
              width: 180px;
              height: 120px;
          }
          .news-title-row {
              flex-direction: row;
              justify-content: space-between;
              align-items: baseline;
          }
      }