abstract：<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0">&
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>border边框</title>
<style type="text/css">
.box{width: 200px; height: 200px; border: solid palevioletred; border-radius: 20px; box-shadow: powderblue 30px 30px 60px inset;}
</style>
</head>
<body>
<div class="box"></div>
</body>
</html>
Correcting teacher：天蓬老师Correction time：2019-06-24 10:04:10
Teacher's summary：边框的作用, 不仅仅可以从视觉上描述出元素之间的边界, 还能让元素更加聚焦他的业务...