<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://apps.bdimg.com/libs/bootstrap/3.3.0/css/bootstrap.min.css">
<script src="https://libs.baidu.com/jquery/2.1.4/jquery.min.js"></script>
<script src="https://apps.bdimg.com/libs/bootstrap/3.3.0/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
<h2>Text</h2>
<p class="text-primary">这个链接使用了样式 "text-primary".</p>
<a class="text-primary" href="/bootstrap/bootstrap-course.html">这个链接使用了样式 "text-primary".</a>
</div>
</body>
</html>