<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<style>
body{
margin: 100px;
}
.span1{
display: inline-block;
border-left: 60px solid darkorange;
border-top: 50px solid transparent;
border-bottom: 50px solid transparent;
/*<!--transparent使border透明，只保留挤压效果-->*/
width: 0px;
height: 0px;
}
.span2{
display: inline-block;
border-left: 50px solid darkorange;
border-top: 50px solid orange;
border-bottom: 50px solid fuchsia;
border-right: 50px solid green;
width: 0px;
height: 0px;
}
.span3{
background-color: blue;
display: inline-block;
border-left: 50px solid darkorange;
border-top: 50px solid orange;
border-bottom: 50px solid fuchsia;
border-right: 50px solid green;
width: 40px;
height: 40px;
}
</style>
</head>
<body>
<span class="span1">
</span>
<span class="span2">
</span>
<span class="span3">
</span>
</body>
</html>
本文出自 “matengbing” 博客，请务必保留此出处http://matengbing.blog.51cto.com/11395502/1876127
原文：http://matengbing.blog.51cto.com/11395502/1876127