     <li class='layui-col-xs4 layui-col-sm3 layui-col-md2 layui-col-lg1 '><i class="fa fa-volume-up"></i><span>fa-volume-up</span></li>
                <li class='layui-col-xs4 layui-col-sm3 layui-col-md2 layui-col-lg1 '><i class="fa fa-random"></i><span>fa-random</span></li>
            </ul>
        </div>

        <div class="section" id="medical">
            <h4><span>医疗</span></h4>
            <hr>
            <ul class="icons layui-row">
                <li class='layui-col-xs4 layui-col-sm3 layu