yui-field-title">
    <legend>分栏间隔</legend>
  </fieldset>

  <div class="layui-row layui-col-space1">
    <div class="layui-col-md3">
      <div class="grid-demo grid-demo-bg1">1/4</div>
    </div>
    <div class="layui-col-md3">
      <div class="grid-demo">1/4</div>
    </div>
    <div class="layui-col-md3">
      <div class="grid-demo grid-demo-bg1">1/4</div>
    </div>
    <div class="layui-col-md3">
      <div class="grid-demo">1/4</div>
    </div>
  </div>

  <br>

  <div class="layui-row layu