近处的大树枝叶茂盛。小草叶子又肥又美。小花绚丽多姿。一阵阵风吹来，花草树木，一起奏出了森林交响曲，一只只蝴蝶随着交响曲跳起了舞呢。
nav导航栏
<nav role="navigation" class="navbar navbar-default">
<div class="container-fluid"></div>
<div class="navbar-header">
<a rel="nofollow noopener noreferrer" href="#" class="navbar-brand"> 大大的logo </a>
</div>
<div >
<ul class="nav navbar-nav">
<li> <a rel="nofollow noopener noreferrer" href="#" > 分类 </a> </li>
<li> <a rel="nofollow noopener noreferrer" href="#" > 分类 </a> </li>
<li> <a rel="nofollow noopener noreferrer" href="#" > 分类 <span class="caret"/> </a> </li>
</ul>
</div>
</nav>
响应式的导航栏
<nav class="navbar navbar-default">
<div class="container-fluid">
<div class="navbar-header">
<button class="navbar-toggle" data-toggle="collapse" data-target="#one">
<span class="sr-only">切换导航</span>
<span class="icon-bar"/>
<span class="icon-bar"/>
<span class="icon-bar"/>
</button>
<a rel="nofollow noopener noreferrer" href="#" class="navbar-brand"> BigLogo </a>
</div>
<div class="collapse navbar-collapse" id="one">
<ul class="nav navbar-nav">
<li> <a rel="nofollow noopener noreferrer" href="#"> 分类1 </a> </li>
<li> <a rel="nofollow noopener noreferrer" href="#"> 分类2 </a> </li>
<li> <a rel="nofollow noopener noreferrer" href="#"> 分类3 </a> </li>
<li> <a rel="nofollow noopener noreferrer" href="#"> 分类4 </a> </li>
</ul>
</div>
</div>
</nav>
具有不同对齐风格和固定的导航栏
<nav class="navbar navbar-default navbar-fixed-top" role="navigation">
<div class="container-fluid">
<div class="navbar-header">
<a rel="nofollow noopener noreferrer" href="#" class="navbar-brand"> 前端万岁 </a>
</div>
<div>
<ul class="nav navbar-nav navbar-right">
<li> <a rel="nofollow noopener noreferrer" href="#" > <span class="glyphicon glyphicon-user"/>注册</a></li>
<li> <a rel="nofollow noopener noreferrer" href="#" > <span class="glyphicon glyphicon-log-in"/>登录</a></li>
</ul>
<ul class="nav navbar-nav navbar-left">
<li> <a rel="nofollow noopener noreferrer" href="#" > <span class="glyphicon glyphicon-user"/>注册</a></li>
<li> <a rel="nofollow noopener noreferrer" href="#" > <span class="glyphicon glyphicon-log-in"/>登录</a></li>
</ul>
</div>
</div>
</nav>
面包屑导航(BreadCrumb)
<ol class="breadcrumb"> <li> <a rel="nofollow noopener noreferrer" href='#' > 首页 </a> </li> <li> <a hef="#" > Java </a> </li> <li class=active"> <a rel="nofollow noopener noreferrer" href="#"> Xxx文章 </a> </li> </ol>
层次导航,让我想起UC的极速模式的 X 级页面
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