关于css:旋转中心点案例

<!DOCTYPE html>
<html lang="en">

<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>旋转中心点案例</title>
<style>

div {  width: 200px;  height: 200px;  border: 1px solid pink;  margin: 10px;  float: left;  overflow: hidden;}div::after {  content: '黑马';  display: block;  top: 0;  left: 0;  width: 100%;  height: 100%;  background-color: hotpink;  transform: rotate(90deg);  transform-origin: left bottom;  transition: all .7s;}/* 鼠标通过div   外面的before还原 */div:hover::after {  transform: rotate(0);}

</style>
</head>

</html>