el-tabs &el-card

el-tabs : https://cloud.tencent.com/developer/section/1489897

el-card: https://cloud.tencent.com/developer/section/1489904

<el-tabs type="border-card">
    <el-tab-pane label="每月接口访问数量统计">  //选项卡
      <el-card class="box-card cardStyle" >   //内容区域
        <div id='myChart' style='height:500px'></div>   
      </el-card>
    </el-tab-pane>
  </el-tabs>