<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
.wb_arrow{
border-right: 2px solid #343c99;
border-top: 2px solid #343c99;
height: 10px;
width: 10px;
margin:50px auto 0;
transform: rotate(deg);
-webkit-transform: rotate(0deg);
border-left: 2px solid transparent;
border-bottom: 2px solid transparent;
}
</style>
</head>
<body>
<div class="wb_arrow"></div>
</body>
</html>
利用常见的 after伪元素
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
.arrow {
width: 20px;
height: 4px;
margin: 0 auto 7px;
border-left: 4px solid transparent;
border-right: 4px solid transparent;
border-bottom: 4px solid #343c99;
transform: rotate(45deg);
transform-origin: left;
}
.arrow:after {
content: '';
display: block;
width: 100%;
height: 100%;
border-left: 4px solid transparent;
border-right: 4px solid transparent;
border-top: 4px solid #343c99;
position: absolute;
right: -10px;
top: -14px;
transform: rotate(90deg);
transform-origin: bottom;
}
</style>
</head>
<body>
<div class="arrow"></div>
</body>
</html>