代码:
HTML
<body>
<div class="wrap">
<div class="box">???</div>
</div>
</body>
CSS
.wrap {
background-color: #0000FF;
display: block;
height: 600px;
margin: 0px auto;
padding: 0px;
width: 600px;
}
.box {
border: solid 20px #FF0000;
color: #FFFFFF;
display: block;
height: 100%;
padding: 0px;
margin: 0px;
text-align: center;
width: 100%;
}
JSFiddle:http:
//jsfiddle.net/5k0ddtdn/4/
考虑到这不是border-box
.
为什么不这样做?