<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>自适应剧中</title>
<style type="text/css">
.middle{
height: 300px;
width: 300px;
border: 1px solid;
display: table-cell;
text-align: center;
vertical-align: middle;
}
.in{
background-color: red;
height: auto;
width: auto;
min-width: 0px;
min-height: 0px;
display: inline;
}
</style>
</head>
<body>
<div class="middle">
<div class="in">内容自适应水平垂直居中</div>
</div>
</body>
</html>
