我正在尝试设计一个像课程一样的自助式网站
在观看教程时
他输入了 <div class="container homepage">
当他选择了css文件时
他输入了.homepage{
text-align: center;
}
但我无法称之为
如果我有
<div class="container homepage">
我如何在css文件中调用它来制作样式！
html文件：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags -->
<meta name="description" content="">
<meta name="author" content="">
<link rel="icon" href="../../favicon.ico">
<title>Let's Code </title>
<!-- this our google font and Font-awesome -->
<link href='http://fonts.googleapis.com/css?family=Arvo' rel='stylesheet' type='text/css'>
<link rel="stylesheet" href="fonts/font-awesome/css/font-awesome.min.css">
<!-- Bootstrap core CSS -->
<link href="css/bootstrap.min.css" rel="stylesheet">
<!-- Custom styles for this template -->
<link href="css/custom.css" rel="stylesheet">
<!-- Just for debugging purposes. Don't actually copy these 2 lines! -->
<!--[if lt IE 9]><script src="../../assets/js/ie8-responsive-file-warning.js"></script><![endif]-->
<!-- <script src="../../assets/js/ie-emulation-modes-warning.js"></script> -->
<!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
<!--[if lt IE 9]>
<script src="https://oss.maxcdn.com/html5shiv/3.7.2/html5shiv.min.js"></script>
<script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
<![endif]-->
</head>
<body>
<nav class="navbar navbar-inverse navbar-fixed-top">
<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="#"><img src="http://www.foxpic.com/V0PSDLRS.png" border="0" alt="One Million Lines" title="One Million Lines" /></a>
</div>
<div id="navbar" class="collapse navbar-collapse">
<ul class="nav navbar-nav navbar-right">
<li class="active"><a href="#">Who We Are</a></li>
<li><a href="#about">Get involved</a></li>
</ul>
</div><!--/.nav-collapse -->
</div>
</nav>
<!-- Main jumbotron for a primary marketing message or call to action -->
<div class="jumbotron">
<div class="container">
<h1>Our goal is to inspire <br>Tallahassee to write 1,000,000<br> lines of code_</h1>
<p>All over the country people are taking the <strong>HOUR OF CODE</strong> challenge issued by <strong>CODE.org</strong>. Millions of lines of code are being written. In the capital of Florida, Tallahassee, the community is taking the challenge and our goal is to write 1,000,000 lines of code_</p>
<p><a class="btn btn-danger btn-lg" role="button">Learn more »</a></p>
<img src="http://www.foxpic.com/V0ROP7Fw.png" border="0" alt="Code.org" />
</div>
</div>
<div class="container hompage">
<h2>Get Involved</h2>
<!-- Example row of columns -->
<div class="row">
<div class="col-md-4"> <!-- grid.html the bootstrap based 12 columns important -->
<span class="fa-stack fa-4x">
<i class="fa fa-circle fa-stack-2x"></i>
<i class="fa fa-user fa-stack-1x fa-inverse"></i>
</span>
<h2>Students</h2>
<p>Want to learn how to code? Want to help us get to 1,000,000 lines? Click the button below and we'll let you know how to get involved. </p>
<p><a class="btn btn-default" href="grid.html" role="button">Start Learning »</a></p>
</div>
<div class="col-md-4">
<span class="fa-stack fa-4x">
<i class="fa fa-circle fa-stack-2x"></i>
<i class="fa fa-pencil fa-stack-1x fa-inverse"></i>
</span>
<h2>Educators</h2>
<p>Want to bring this initiative to your school or institution? Awesome! Click the button below and we'll make it happen. </p>
<p><a class="btn btn-default" href="https://www.google.com" target="_blank" role="button">Join the Initiative »</a></p>
</div>
<div class="col-md-4">
<span class="fa-stack fa-4x">
<i class="fa fa-circle fa-stack-2x"></i>
<i class="fa fa-money fa-stack-1x fa-inverse"></i>
</span>
<h2>Sponsors</h2>
<p>We love all the support we get to help host more events, and empower more lives with the knowledge of coding. Click to get involved.</p>
<p><a class="btn btn-default" href="https://docs.google.com/forms/d/1Jc5emQqf1e43PHM5US6Rrss2vXGmYNhI1o5GLIckmho/viewform?usp=send_form" target="_blank" role="button">Give Support »</a></p>
</div>
</div>
<hr>
<footer>
<p>© Company 2014</p>
</footer>
</div> <!-- /container -->
<!-- Bootstrap core JavaScript
================================================== -->
<!-- Placed at the end of the document so the pages load faster -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
<script src="../../dist/js/bootstrap.min.js"></script>
<!-- IE10 viewport hack for Surface/desktop Windows 8 bug -->
<script src="../../assets/js/ie10-viewport-bug-workaround.js"></script>
</body>
</html>
css文件：（custom.ss）
/* Move down content because we have a fixed navbar that is 50px tall */
body {
padding-top: 50px;
padding-bottom: 20px;
}
ul.nav{
font-family: 'Arvo',courier,serif;
}
ul.nav{
font-size: 13px;
}
.jumbotron {
text-align: center;
background-image: url(http://www.foxpic.com/V1rV3XC8.jpg);
color: white;
}
.jumbotron h1{
font-family: 'Arvo', courier, serif;
}
.jumbotron h1{
margin-top: 0px;
margin-bottom: 50px;
}
.jumbotron p{
margin-bottom: 30px;
font-weight: 100;
padding : 0 50px;
}
.btn-lg {
font-size: 36px;
}
.homepage{
text-align: center;
}
.homepage h2{
color: #e74c3c;
font-family: 'Arvo', courier ,serif;
text-transform: uppercase;
}
答案 0 :(得分：2)
你有一个错字，你有：
<div class="container hompage">
应该是：
<div class="container homepage">
答案 1 :(得分：1)
有一个错字。 div类应该是.homepage而不是.hompage