只需修改 width 、height、border-top-right-radius 便可随意使用。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
body { padding: 100px; }
div{
position: relative;
background-color: orange;
}
div:before,
div:after {
content: '';
position: absolute;
background-color: inherit;
}
div,
div:before,
div:after {
width: 10em;
height: 10em;
border-top-right-radius: 30%;
}
div { transform: rotate(-60deg) skewX(-30deg) scale(1,.866); }
div:before { transform: rotate(-135deg) skewX(-45deg) scale(1.414, .707) translate(0,-50%); }
div:after { transform: rotate(135deg) skewY(-45deg) scale(.707, 1.414) translate(50%);}
</style>
</head>
<body>
<div></div>
</body>
</html>