Bootstrap3 居中内容块—

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<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>Bootstrap3 居中内容块 - 迹忆客(jiyik.com)</title>
    <link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css">  
    <script src="https://cdn.staticfile.org/jquery/2.1.1/jquery.min.js"></script>
    <script src="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
​
<div class="row">
    <div class="center-block" style="width:200px;background-color:#ccc;">
        这是 center-block 实例
    </div>
</div>
​
</body>
</html>