 <div class="layui-col-md4">
      <div class="grid-demo">33.33%</div>
    </div>
  </div>

   <fieldset class="layui-elem-field layui-field-title">
    <legend>列偏移</legend>
  </fieldset>

  <div class="layui-row">
    <div class="layui-col-md4">
      <div class="grid-demo grid-demo-bg1">33.33%</div>
    </div>
    <div class="layui-col-md4 layui-col-md-offset4">
      <div class="grid-demo">偏移4列</div>
    </div>
    <div class="layui-col-md1 layui-col-md-offset5">
      <div class="grid-demo g