et>

  <div class="layui-row">
    <div class="layui-col-md5">
      <div class="layui-row grid-demo">
        <div class="layui-col-md3">
          <div class="grid-demo grid-demo-bg1">内部列</div>
        </div>
        <div class="layui-col-md9">
          <div class="grid-demo grid-demo-bg2">内部列</div>
        </div>
        <div class="layui-col-md12">
          <div class="grid-demo grid-demo-bg3">内部列</div>
        </div>
      </div>
    </div>
    <div class="layui-col-md7">
      <div