我有以下代码。 我在jsbin上测试它，然后预览工作正常，但是当我下载文件并在谷歌浏览器中打开它时，下拉菜单会被标题隐藏吗？
此外，页面的左侧还有铬合金切割。
非常感谢你的帮助
<!DOCTYPE html>
<html lang="en">
<head>
<title>Ristorante Con Fusion</title>
</head>
<body>
<nav class="navbar navbar-inverse navbar-fixed-top" role="navigation">
<div class="container">
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#">Ristorante Con Fusion</a>
<div id="navbar" class="navbar-collapse collapse">
<ul class="nav navbar-nav">
<li class="active"><a href="#"><span class="glyphicon glyphicon-home"
aria-hidden="true"></span> Home</a>
</li>
<li><a href="#">About</a>
</li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">
Menu <span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="#">Appetizers</a>
</li>
<li><a href="#">Main Courses</a>
</li>
<li><a href="#">Desserts</a>
</li>
<li><a href="#">Drinks</a>
</li>
<li role="separator" class="divider"></li>
<li class="dropdown-header">Specials</li>
<li><a href="#">Lunch Buffet</a>
</li>
<li><a href="#">Weekend Brunch</a>
</li>
</ul>
</li>
<li><a href="#">Contact</a>
</li>
</ul>
</div>
</nav>
<header class="jumbotron">
<!-- Main component for a primary marketing message or call to action -->
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<script src="https://code.jquery.com/jquery.min.js"></script>
<link href="https://netdna.bootstrapcdn.com/twitter-bootstrap/2.3.2/css/bootstrap-combined.min.css" rel="stylesheet" type="text/css" />
<script src="https://netdna.bootstrapcdn.com/twitter-bootstrap/2.3.2/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="http://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.6.3/css/font-awesome.min.css">
<!-- The above 3 meta tags *must* come first in the head; any other head
content must come *after* these tags -->
<div class="row row-header">
<div class="row">
<div class="col-xs-12 col-sm-8">
<h1>Ristorante con Fusion</h1>
<p style="padding:40px;"></p>
<p>We take inspiration from the World's best cuisines, and create a unique fusion experience. Our lipsmacking creations will tickle your culinary senses!</p>
</div>
<div class="col-xs-12 col-sm-4">
</div>
</div>
</div>
</header>
<div class="container">
<div class="row row-content">
<div class="col-xs-12 col-sm-3 col-sm-push-9">
<p style="padding:20px;"></p>
<h3 align=center>Our Lipsmacking Culinary Creations</h3>
</div>
<div class="col-xs-12 col-sm-9 col-sm-pull-3">
<h2>Uthappizza</h2>
<p>A unique combination of Indian Uthappam (pancake) and Italian pizza, topped with Cerignola olives, ripe vine cherry tomatoes, Vidalia onion, Guntur chillies and Buffalo Paneer.</p>
<p><a href="#">More »</a>
</p>
</div>
</div>
<div class="row row-content">
<div class="col-xs-12 col-sm-3 col-sm-push-9">
<p style="padding:20px;"></p>
<h3 align=center>This Month's Promotions</h3>
</div>
<div class="col-xs-12 col-sm-9 col-sm-pull-3">
<h2>Weekend Grand Buffet</h2>
<p>Featuring mouthwatering combinations with a choice of five different salads, six enticing appetizers, six main entrees and five choicest desserts. Free flowing bubbly and soft drinks. All for just $19.99 per person</p>
<p><a href="#">More »</a>
</p>
</div>
</div>
<div class="row row-content">
<div class="col-xs-12 col-sm-3 col-sm-push-9">
<p style="padding:20px;"></p>
<h3 align=center>Meet our Culinary Specialists</h3>
</div>
<div class="col-xs-12 col-sm-9 col-sm-pull-3">
<h2>Alberto Somayya</h2>
<h4>Executive Chef</h4>
<p>Award winning three-star Michelin chef with wide International experience having worked closely with whos-who in the culinary world, he specializes in creating mouthwatering Indo-Italian fusion experiences.</p>
<p><a href="#">More »</a>
</p>
</div>
</div>
</div>
<footer class="row-footer">
<div class="row">
<div class="col-xs-5 col-xs-offset-1 col-sm-2 col-sm-offset-1">
<h5>Links</h5>
<ul class="list-unstyled">
<li><a href="#">Home</a>
</li>
<li><a href="#">About</a>
</li>
<li><a href="#">Menu</a>
</li>
<li><a href="#">Contact</a>
</li>
</ul>
</div>
<div class="col-xs-6 col-sm-5">
<h5>Our Address</h5>
<address>
121, Clear Water Bay Road<br>
Clear Water Bay, Kowloon<br>
HONG KONG<br>
<!-- Tel.: +852 1234 5678<br>
Fax: +852 8765 4321<br>
Email: <a href="mailto:confusion@food.net">confusion@food.net</a>-->
</address>
<i class="fa fa-phone"></i>: +852 1234 5678
<br>
<i class="fa fa-fax"></i>: +852 8765 4321
<br>
<i class="fa fa-envelope"></i>:
<a href="mailto:confusion@food.net">confusion@food.net</a>
</div>
<div class="nav navbar-nav" style="padding: 40px 10px;">
<a class="btn btn-social-icon btn-google-plus" href="http://google.com/+"><i class="fa fa-google-plus"></i></a>
<a class="btn btn-social-icon btn-facebook" href="http://www.facebook.com/profile.php?id="><i class="fa fa-facebook"></i></a>
<a class="btn btn-social-icon btn-linkedin" href="http://www.linkedin.com/in/"><i class="fa fa-linkedin"></i></a>
<a class="btn btn-social-icon btn-twitter" href="http://twitter.com/"><i class="fa fa-twitter"></i></a>
<a class="btn btn-social-icon btn-youtube" href="http://youtube.com/"><i class="fa fa-youtube"></i></a>
<a class="btn btn-social-icon" href="mailto:"><i class="fa fa-envelope-o"></i></a>
</div>
<!--
<div class="col-xs-12 col-sm-4">
<div style="padding: 40px 10px;">
<a href="http://google.com/+">Google+</a>
<a href="http://www.facebook.com/profile.php?id=">Facebook</a>
<a href="http://www.linkedin.com/in/">LinkedIn</a>
<a href="http://twitter.com/">Twitter</a>
<a href="http://youtube.com/">YouTube</a>
<a href="mailto:">Mail</a>
</div>
</div>-->
<div class="col-xs-12">
<p style="padding:10px;"></p>
<p align=center>© Copyright 2015 Ristorante Con Fusion</p>
</div>
</div>
</footer>
<!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
<!-- Include all compiled plugins (below), or include individual files as needed -->
<script src="js/bootstrap.min.js"></script>
</body>
</html>
答案 0 :(得分：1)
如果某个元素被另一个元素覆盖，则可能意味着您应该定义position（relative / absolute - 自己确定，因为您最了解您的代码）和{ {1}}。然后为您希望置于最顶层的元素添加更高的z-index值。