1.示例效果图如下

bootstrap标题效果_bootstrap


2.代码实现如下

<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<meta http-equiv="X-UA-Compatible" content="IE=edge">
	<title>标题</title>
	<!-- 最新版本的 Bootstrap 核心 CSS 文件 -->
	<link rel="stylesheet" 
	href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" 
	integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" 
	crossorigin="anonymous">

	<!-- 可选的 Bootstrap 主题文件（一般不用引入） -->
	<link rel="stylesheet" 
	href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap-theme.min.css" 
	integrity="sha384-rHyoN1iRsVXV4nD0JutlnGaslCJuC7uwjduW9SVrLvRYooPp2bWYgmgJQIXwl/Sp" 
	crossorigin="anonymous">
</head>
<body>
	<!-- 标签标题 -->
	<h1>I'm h1</h1>
	<h2>I'm h2</h2>
	<h3>I'm h3</h3>
	<h4>I'm h4</h4>
	<h5>I'm h5</h5>
	<h6>I'm h6</h6>

	<!-- 通过类名实现标题效果 -->
	<span class="h1">.h1</span>
	<span class="h2">.h2</span>
	<span class="h3">.h3</span>
	<span class="h4">.h4</span>
	<span class="h6">.h5</span>
	<span class="h6">.h6</span>

	<!-- 大标题中嵌套小标题 -->
	<h1>大h1标题<small>小h1标题</small></h1>
	<h2>大h2标题<small>小h2标题</small></h2>
	<h3>大h3标题<small>小h3标题</small></h3>
	<h4>大h4标题<small>小h4标题</small></h4>
	<h5>大h5标题<small>小h5标题</small></h5>
	<h6>大h6标题<small>小h6标题</small></h6>

	<script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js"></script>
	<!-- 最新的 Bootstrap 核心 JavaScript 文件 -->
	<script 
	src="https://cdn.bootcss.com/bootstrap/3.3.7/js/bootstrap.min.js" 
	integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" 
	crossorigin="anonymous"></script>
</body>
</html>