transform 2d变形实例练习：练习了旋转 倾斜 缩放的功能
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>transform</title>
<style>
.box{background-color: #000;width: 100px;height: 100px;transition: 2s ease;margin:20px;display: inline-block;}
/* 旋转 */
#box:hover{transform:rotate(360deg);}
/* X 和 Y 轴的 2D 倾斜转换 */
#box2:hover{transform:skew(45deg,0deg);}
/* x y 缩放 */
#box3:hover{transform:scale(2,2);}
/* x y 转换 */
#box4:hover{transform:translateX(200px) translateY(200px);}
</style>
</head>
<body>
<div class="box" id="box"></div>
<div class="box" id="box2"></div>
<div class="box" id="box3"></div>
<div class="box" id="box4"></div>
</body>
</html>
