1.span标签设置箭头的用法
<div id="span">
<span id="sanjiao"></span>
#span{
width: 9%;
height: 24px;
position: absolute;
top: 75px;
left: 620px;
}
#sanjiao{
width: 100px;
border: 6px solid transparent; /* 透明边框*/
border-bottom-color: #fff458; /* 箭头颜色*/
display: block;
}
