为何container内容始终不能对齐呢？
<html>
<head>
<meta charset="utf-8">
<title>隐性改变display类型</title>
<style>
.container a{
position:absolute;
width:200px;
background:#ccc;
display:inline;
}
.container {
text-align:center;
}
</style>
</head>
<body>
<div class="container">
<a href="#" title="">进入课程请单击这里</a>
</div>
</body>
</html>
