????：<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>邊框</title> <!-- <link rel="icon" type="image/
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>邊框</title>
<!-- <link rel="icon" type="image/x-icon"> -->
<style type="text/css">
*{margin: 0;padding: 0}
div{
width: 200px;
height: 200px;
margin: 50px auto;
border: dotted;
}
</style>
</head>
<body>
<hr>
<div >
</div>
</body>
?? ???：天蓬老師?? ??：2019-03-28 09:50:42
???? ??：你的邊框也實(shí)在是太簡(jiǎn)單了吧, 很多樣式都沒(méi)有了