<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
.hold{position:absolute;width:200px;height:200px;}
.outer{position:absolute;width:200px;height:200px;transform:rotate(225deg);clip:rect(0px,100px,200px,0px);border-radius:100px;background:yellow;}
.pie{position:absolute;width:200px;height:200px;transform:rotate(180deg) !important;clip:rect(0px,100px,200px,0px);border-radius:100px;background:yellow;}
.left{position:absolute;width:200px;height:200px;transform:rotate(135deg);clip:rect(auto,auto,auto,auto);border-radius:100px;}
.leftadd{position:absolute;width:200px;height:200px;transform:rotate(180deg) !important;clip:rect(0px,100px,200px,0px);border-radius:100px;background:red;}
.add{position:absolute;width:200px;height:200px;transform:rotate(225deg) !important;clip:rect(0px,100px,200px,0px);border-radius:100px;background:red;}
</style>
</head>
<body>
<div class="hold" style="margin:100px 0 0 200px;">
<div class="outer"></div>
<div class="pie"></div>
</div>
<div class="left" style="margin:320px 0 0 200px;">
<div class="add"></div>
<div class="leftadd"></div>
</div>
</body>
</html>
效果图：
