BootStrap组件

巨幕
<div class="jumbotron">
  <div class="container">
    ...
  </div>
</div>
页头
 <nav class="navbar navbar-inverse navbar-fixed-top">
        <div class="container">
           <div class="navbar-header">
             <button class="navbar-toggle collapsed" data-toggle="collapse" data-target="#links">
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>             
                <tton>
            <img src="img/logoMsg.png" class="img-responsive" width="100px" height="100px"/>
           </div>
           <div class="collapse navbar-collapse" >>