// CSS
   table { background:#DCDFE6; width: 100%; }
   table td { background:#FFFFF; }
   // HTML
   <table border="0" cellspacing="1" cellpadding="0">
        <tr>
          <td colspan="3"><el-checkbox>仪表面板</el-checkbox></td>
        </tr>
        <tr>
           <td rowspan="2"><el-checkbox>渠道管理</el-checkbox></td>
           <td><el-checkbox>渠道列表</el-checkbox></td>
          <td>
             <el-checkbox>新增</el-checkbox>
             <el-checkbox>编辑</el-checkbox>
             <el-checkbox>删除</el-checkbox>
          </td>
       </tr>
  </table>