bordre边框练习
<html>
<head>
<meta charset="utf-8">
<title>border边框练习</title>
<style>
.box{
width:300px;
height:300px;
border-top:1px solid red;
border-right:1px dashed #ccc;
border-bottom:1px double #333;
border-left:1px dotted blue;
}
.box2{
margin:10px;
width:150px;
height:150px;
box-shadow:10px 20px 3px #ccc inset;
}
button{
border:none;
font-size:20px;
}
</style>
</head>
<body>
<div class="box"></div>
<div class="box2"></div>
<button class="btu">login</button>
</body>
</html>