ent="bottom" title="更换主题"><i class="fa fa-image"></i></a>
  <a href="javascript:;" id="submit_URL" data-toggle="tooltip" data-placement="bottom" title="网址提交"><i class="fa fa-pencil-square-o"></i></a>
</div>
<button class="bar-btn visible-xs visible-sm">
  <span class="icon-bar bar-line1"></span>
  <span class="icon-bar bar-line2"></span>
</button>
<button class="nav-btn visible-xs visible-sm">
  <span class="icon-line top"></span>
  <span class="icon-line middle"></span>
  <span class="icon-