abstract：<!DOCTYPE html><html><head><meta charset="utf-8"><title>边框样式</title><style type=“text/css”> .box{width:20px；height:30px；border:1px solid
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>边框样式</title>
<style type=“text/css”>
.box{width:20px；height:30px；border:1px solid red；}
.main{width:30px；height:40px；border-top: 1px solid #ccc；border-right: 1px dashed #ccc；background: pink；}
button{border: none；}
.shadow{width:100px；height:30px；box-shadow: 5px 6px 10px #ccc ；/*inset*/}
</style>
</head>
<body>
<div class="box"></div>
<div class="main"></div>
<button>登陆</button>
<div class="shadow"></div>
</body>
</html>
Correcting teacher：西门大官人Correction time：2019-03-03 10:28:51
Teacher's summary：CSS中的边框是通过定义border实现的，如border-color可以控制颜色，border-radius可以控制边框弧度等