bootstrap中的排版
标题（h1~h6/.h1~.h6）
h1:36px;h2:30px;h3:24px;h4:18px;h5:14px;h6:12px;
副标题(small)
小练习（标题大小和副标题的使用）：
1 <!DOCTYPE html>
2 <html>
3 <head>
4 <meta charset="UTF-8">
5 <title></title>
6 <link href="http://libs.baidu.com/bootstrap/3.0.3/css/bootstrap.min.css" rel="stylesheet">
7 <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
8 <script src="http://libs.baidu.com/bootstrap/3.0.3/js/bootstrap.min.js"></script>
9 </head>
10 <body>
11 <h1>标题一<small>小标题</small></h1>
12 <h2>标题二</h2>
13 <h3>标题三</h3>
14 <h4>标题四</h4>
15 <h5>标题五</h5>
16 <h6>标题六</h6>
17 <span class="h1">标题一</span>
18 <span class="h2">标题一</span>
19 <span class="h3">标题一</span>
20 <span class="h4">标题一</span>
21 <span class="h5">标题一</span>
22 <span class="h6">标题一</span>
23 </body>
24 </html>
示例代码