<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<link rel="stylesheet" href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdn.bootcss.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
<nav class="navbar navbar-default" role="navigation">
<div class="navbar-header">
<a class="navbar-brand" href="#">四季首页</a>
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#example-navbar-collapse">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
</div>
<div class="collapse navbar-collapse" id="example-navbar-collapse">
<ul class="nav navbar-nav">
<li class="active"><a href="#">春天</a></li>
<li><a href="#">夏天</a></li>
<li><a href="#">秋天</a></li>
<li><a href="#">冬天</a></li>
<li class="dropdown">
<ul class="dropdown-menu">
<li><a href="#"></a></li>
<li class="divider"></li>
<li><a href="#"></a></li>
<li class="divider"></li>
<li><a href="#"></a></li>
</ul>
</li>
</ul>
</div>
</nav>
<div id="LBbox" class="carousel slide" data-ride="carousel">
<ol class="carousel-indicators">
<li data-target="#LBbox" data-slide-to="0" class="active"></li>
<li data-target="#LBbox" data-slide-to="1"></li>
<li data-target="#LBbox" data-slide-to="2"></li>
<li data-target="#LBbox" data-slide-to="3"></li>
</ol>
<!-- 轮播内容 -->
<div class="carousel-inner" role="listbox">
<div class="item active">
<img src="img/4/spring.jpg" alt="1 slide">
<div class="carousel-caption">
<h1>春天</h1>
</div>
</div>
<div class="item">
<img src="img/4/summer.jpg" alt="2 slide">
<div class="carousel-caption">
<h1>夏天</h1>
</div>
</div>
<div class="item">
<img src="img/4/autumn.jpg" alt="2 slide">
<div class="carousel-caption">
<h1>秋天</h1>
</div>
</div>
<div class="item">
<img src="img/4/winter.jpg" alt="2 slide">
<div class="carousel-caption">
<h1>冬天</h1>
</div>
</div>
</div>
<!-- 左按钮 -->
<a href="#LBbox" class="left carousel-control" role="button" data-slide="prev">
<span class="glyphicon glyphicon-chevron-left" aria-hidden="true"></span>
<span class="sr-only">上一页</span>
</a>
<!-- 右按钮 -->
<a href="#LBbox" class="right carousel-control" role="button" data-slide="next">
<span class="glyphicon glyphicon-chevron-right" aria-hidden="true"></span>
<span class="sr-only">下一页</span>
</a>
</div>
<script src="http://cdn.bootcss.com/jquery/1.11.1/jquery.min.js"></script>
<script src="http://cdn.bootcss.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
<style>
.carousel {
height: 500px;
}
.carousel .item {
height: 500px;
}
.carousel .item img {
width: 100%;
}
</style>
</body>
</html>