Olá,
O meu menu dropdown não expande, segue o código:
<!DOCTYPE html>
<html>
<head>
<title>Loja Virtual</title>
<meta charset="utf-8" />
<link rel="stylesheet" type="text/css" href="bootstrap/css/bootstrap.min.css" />
<link rel="stylesheet" type="text/css" href="bootstrap/css/bootstrap-theme.min.css">
<meta name="viewport" content="width=device-width" />
<style>
.navbar-header button {
color:#fff;
}
.fullscreen {
width: 100%;
}
main {
padding-top: 50px;
}
</style>
</head>
<body>
<header>
<nav class="navbar navbar-fixed-top navbar-inverse">
<div class="container">
<div class="navbar-header">
<a href="#" class="navbar-brand">Caelum</a>
<button class="navbar navbar-toggle" type="button" data-target=".navbar-collapse"data-toggle="collapse">Menu</button>
</div>
<div class="collapse navbar-collapse">
<ul class="navbar-nav nav">
<li><a href="#">Novidades</a></li>
<li><a href="#">Mais Vendidos</a></li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown">Camisetas<span class="caret"></span>
</a>
<ul class="dropdown-menu">
<li><a href="#">Masculino</a></li>
<li><a href="#">Feminina</a></li>
<li><a href="#">Infantil</a></li>
</ul>
</li>
</ul>
</div>
</div>
</nav>
</header>
<main>
<div class="conteiner-fluid"></div>
<div class="row">
<div id="carousel" class="carousel slide" data-ride="carousel">
<div class="carousel-inner" role="listbox">
<div class="item active">
<img src="img/banner1.jpg" alt="Moda" class="fullscreen">
</div>
<div class="item">
<img src="img/banner2.jpg" alt="Moda Infantil" class="fullscreen">
</div>
</div>
<a href="#carousel" role="button" data-slide="prev" class="left carousel-control">
<span class="glyphicon glyphicon-chevron-left" aria-hidden="true"></span>
</a>
<a href="#carousel" role="button" data-slide="next" class="right carousel-control">
<span class="glyphicon glyphicon-chevron-right" aria-hidden="true"></span>
</a>
</div>
</div>
<div>
<h3 class="text-center">Novidades</h3>
</div>
<div class="col-xs-12 col-md-4 thumbnail text-center">
<figure>
<img src="img/camisa-azul.png" alt="Camisa Azul Importada" />
<div>
<h4>Camisa Azul Importada</h4>
<p>Camisa Azul importada com um preço acessível e com pano de qualidade</p>
</div>
</figure>
<p>R$ 190,00</p>
<a href="#" class="btn btn-primary">Comprar </a>
</div>
<div class="col-xs-12 col-md-4 thumbnail text-center">
<figure>
<img src="img/camisa-rosa.png" alt="Camisa Azul Importada" />
<div>
<h4>Camisa Rosa Argentina</h4>
<p>Camisa Rosa da Argentina com um preço acessível e com pano de qualidade</p>
</div>
</figure>
<p>R$ 210,00</p>
<a href="#" class="btn btn-primary">Comprar </a>
</div>
<div class="col-xs-12 col-md-4 thumbnail text-center">
<figure>
<img src="img/camisa-azul.png" alt="Camisa Azul Importada" />
<div>
<h4>Camisa Azul nacional</h4>
<p>Camisa Azul nacional com um preço acessível ebonita</p>
</div>
</figure>
<p>R$ 80,00</p>
<a href="#" class="btn btn-primary">Comprar </a>
</div>
</main>
<script src="http://code.jquery.com/jquery.js"></script>
<script src="http://code.jquery.com/jquery.min.js"></script>
<!-- <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script> -->
<!-- <script src='http://code.jquery.com/jquery-2.1.3.min.js'></script> -->
<script src="bootstrap/js/bootstrap.js"></script>
<script src="bootstrap/js/bootstrap.min.js"></script>
</body>
</html>
