ul>
    <ul class="layui-nav layui-layout-right">
        <li class="layui-nav-item mobile layui-hide-xs" lay-unselect>
            <a href="javascript:;" lay-event="fullscreen" title="{:lang('Fullscreen')}"><i class="layui-icon layui-icon-screen-full"></i></a>
        </li>
        <li class="layui-nav-item layui-hide-xs" lay-unselect="">
            <a lay-event="lockScreen" title="{:lang('Lock')}"><i class="layui-icon layui-icon-password"></i></a>
        </li>
        <li class="layui-nav-item">
       