<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>盒子阴影</title>
<style>
.box {
width: 200px;
height: 200px;
background-color: orange;
margin: 200px auto;
/*opacity: 0;*/
transition: .3s;
}
.box {
/*x轴偏移 y轴偏移 虚化程度 阴影宽度 阴影颜色*/
/*box-shadow: -300px 0 10px 0 red, 300px 0 10px 0 blue;*/
}
.box:hover {
margin-top: 195px;
box-shadow: 0 5px 10px 0 #333;
}
</style>
</head>
<body>
<div class="box"></div>
</body>
</html>原文：https://www.cnblogs.com/zhoajiahao/p/11294417.html