1、写三角形
.tooltip:after {
content:
position:
border:
border-color:
width:
height:
bottom:
left:
margin-left:
2、写大于号
width: 12px;
height: 12px;
position: absolute;
border-left: 1px solid #FF7154;
border-bottom: 1px solid #FF7154;
-webkit-transform: translate(0,-50%) rotate(-135deg);
transform: translate(0,-50%) rotate(-135deg);