<div class="jumbotron">
 <div class="container">
  <h1>Bootstrap案例开发</h1>
  <h2>简洁、直观、强悍的前端开发框架，让web开发更迅速、简单</h2>
  <p>
   <a href="javascript:void(0)" rel="external nofollow" rel="external nofollow" class="btn btn-primary btn-lg btn-shadow v3a" title="bootstrap中文网巨幕效果" role="button" target="_blank">Bootstrap3中文文档(v3.3.7)</a>
  </p>
  <a href="javascript:void(0)" rel="external nofollow" rel="external nofollow" class="v2a" rolw="button" target="_blank" title="Bootstrap2中文文档">Bootstrap2中文文档(v2.3.7)</a>
 </div>
</div>

<style>
 .jumbotron{style="background-color: rgba(88, 45, 88, 0.84);}
 .v2a{color: grey; -webkit-transition: all .3s ease-out;}
 .v2a:hover{color: white;text-decoration: underline;}
 .v3a{-webkit-transition: all .3s ease-out;}
 .v3a:hover{text-decoration: underline;}
</style>