摘要：<!DOCTYPE html><html><head><meta charset="UTF-8"><title>学习css第三节课 —— 边框</title><link rel="shortcut icon" href="images/1.jpg"><
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>学习css第三节课 —— 边框</title>
<link rel="shortcut icon" href="images/1.jpg">
<link rel="stylesheet" href="css/style.css">
<style>
div {margin-top: 10px;}
.box {width: 100px;height: 100px;border: 1px /* solid double dashed */ dotted #ccc;border-radius: 50px;}
.main {width: 100px;height: 100px;border-bottom: 1px solid red;background: #ccc;}
button {border: none;}
.shadow {width: 300px;height: 40px;box-shadow: 0px 5px 3px #ccc inset;border: 1px solid #ccc;}
</style>
</head>
<body>
<div></div>
<div></div>
<button>登录</button>
<div></div>
</body>
</html>
批改老师：天蓬老师批改时间：2018-12-22 13:39:53
老师总结：对于: 0px, 这样的单位, 建议把 px去掉不要写, 0px === 0
