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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

            
              <ul class="menu">
  <li class="item-left">
    <a href="#">
      <div class="menu-item">个人业务</div>
      <div class="item-content">个人业务包含的内容</div>
    </a>
  </li><li>
    <a href="#">
      <div class="menu-item">公司业务</div>
      <div class="item-content">公司业务中包含的内容</div>
    </a>
  </li><li>
    <a href="#">
      <div class="menu-item">中小企业</div>
      <div class="item-content">中小企业中包含的内容</div>
    </a>
  </li><li>
    <a href="#">
      <div class="menu-item">信用生活</div>
      <div class="item-content">信用生活中包含的内容</div>
    </a>
  </li><li>
    <a href="#">
      <div class="menu-item">商旅预订</div>
      <div class="item-content">商旅预订中包含的内容</div>
    </a>
  </li><li class="item-right">
    <a href="#">
      <div class="menu-item">今日招行</div>
      <div class="item-content">信用贷款包含的内容</div>
    </a>
  </li>
</ul>
            
          
!
            
              .menu {
  text-align: center;
  
  li {
    background-color: #be0000;
    display: inline-block;
    
    /* 处理最左边的菜单项 */
    &.item-left {
      a .item-content {
        position: absolute;
        left: 0;
      }
    }
    
    /* 处理最右边的菜单项 */
    &.item-right {
      a .item-content {
        position: absolute;
        left: -100%;
      }
    }

    a {
      color: #fff;
      display: block;
      height: 34px;
      padding: 10px;
      position: relative;
      text-decoration: none;
      
      .menu-item {
        border: 1px solid transparent; // 边框宽度保留,颜色统统透明
        height: 34px;
        padding: 8px;
        position: relative; // 重要,默认的 static 无法改变 z-index 值
      }
      
      .item-content {
        background-color: #f4f4f4;
        color: #000;
        display: none;
        height: 150px; // 容器大小根据具体需求调整
        left: -50%; // 可根据具体需求进行调整
        line-height: 150px;
        position: absolute;
        top: 60px;
        width: 200px; // 容器大小根据具体需求调整
      }
      
      &:hover {
        .menu-item {
          background: #f4f4f4;
          border: 1px solid #be0000;
          border-bottom: none; // 下方无边框,镂空
          color: #000;
          z-index: 1000; // z轴上,menu-item 位于 item-content 之上
        }
        
        .item-content {
          border: 1px solid #be0000;
          display: block;
          z-index: 100;
        }
      }
    }
  }
}
            
          
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