*{margin:0; padding:0; list-style: none;}
.ask{width:72px; position: fixed; left:10px; top:30%; text-align: center;z-index: 5; border: 1px solid #1785e7;}
.ask ul li{width:70px; text-align: center;}
.ask ul li a{width:70px; text-align: center; display: block;}
.ask ul li img{vertical-align: middle;}