锘?layui-nav { position: relative; padding: 0 30px; background-color: #3089c1; color: #fff; border-radius: 2px; font-size: 0; box-sizing: border-box; } .layui-nav .layui-this:after, .layui-nav-bar, .layui-nav-tree .layui-nav-itemed:after { position: absolute; left: 0; top: 0; width: 0; height: 5px; background-color: #a9dbfa; transition: all .2s; -webkit-transition: all .2s; } .layui-bg-blue .layui-nav-bar, .layui-bg-blue .layui-nav-itemed:after, .layui-bg-blue .layui-this:after { background-color: #5a81cf; } .news-council-li .dangqian{ color: #5a81cf; border-color: #5a81cf; } .layui-nav .layui-nav-item a { display: block; padding: 0 28px; transition: all .3s; -webkit-transition: all .3s; } .layui-nav * { font-size: 15px; }