[30--CSS]margin 外边距
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<!--外边距和内边距都基于盒子模型的，margin可以让当前元素里浏览窗口离远一些-->
<style>
div{margin-top: 50px;
margin-left: 100px;
margin-right: 100px;
margin-bottom: 50px;
background-color: pink;
width: 200px;
height: 500px;
}
</style>
</head>
<body>
<div></div>
</body>
</html>
