<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>css3图片缓慢放大缩小</title>
<style>
.div{
width: 500px;
height: 500px;
margin: 150px auto 0;
}
.div img{
transition: all 2s ease 0s;
}
/* transition 别放hover里，放到img里，这样移入移出一样缓慢，不然只对hover移上去有缓慢效果 */
.div img:hover{
transform: scale(1.2);
/*transition: all 2s ease-in-out 0s;*/
}
</style>
</head>
<body>
<div class="div">
<img src="img/img-11-02.jpg">
</div>
</body>
</html>
原文：https://www.cnblogs.com/randon/p/11634399.html