.active1{color:red;border-bottom:3px solid red}body{margin:0}::-webkit-scrollbar{display:none}.app-trops{display:flex;justify-content:space-around;overflow-y:scroll;border-bottom:none;width:100%;position:fixed;z-index:999;background:#fff}.app-trops .app-left{margin-top:26px;margin-left:-200px}.app-top{display:flex;justify-content:space-around}.app-top .app-bom{width:100px;text-align:center;line-height:80px;color:#666;font-size:20px;cursor:pointer}.active1{color:#000;border-bottom:3px solid #000}li{list-style:none}