css保证金问题

当给定顶部保证金时，div“welove”也推动了它被包裹的div。我不希望发生这种情况。谁能告诉我我做错了什么？该网站是在这里住：http://littleboxcreative.com css保证金问题

--html--

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
<title>Little Box Creative</title> 
<link rel="stylesheet" type="text/css" href="style.css" /> 
<link rel="stylesheet" type="text/css" href="jqtransformplugin/jqtransform.css" /> 
<link rel="stylesheet" type="text/css" href="formValidator/validationEngine.jquery.css" /> 
<link rel="stylesheet" type="text/css" href="demo.css" /> 




<script type="text/javascript" src="js/jquery.jqtransform.js"></script> 
<script type="text/javascript" src="js/jquery.validationEngine.js"></script> 
<script type="text/javascript" src="js/jquery.js"></script> 
<script type="text/javascript" src="script.js"></script> 


</head> 




<body> 

<div id="wrapper"> 

<div id="header"> 

    <div id="logo"> 
    </div> 
    <div id="tagline"> 

     <div class="tagline1"> 
     </div> 
    <div id="headline"> 
    </div> 
     <div class="tagline2"> 
     </div> 





    </div> 









</div> 



<div id="body"> 
     <div id="services"> 

     </div> 
     <hr /> 
     <div id="portfolio"> 

     </div> 
    <div id="innerbody"> 
     <div id="welove"> 

     </div> 
    </div> 
</div> 
</div> 
</body> 
</html>

--css--

body { 
    background-color: #0E121B; 
    color: #ffffff; 
} 

#wrapper { 
    width:960px; 
    height: 100%; 
    margin:0 auto; 
} 

#header { 
    width: 960px; 
    height: 500px; 
    margin: 0 auto; 
} 

#logo { 
    width: 470px; 
    height:400px; 
    background-color: #ffffff; 
    float: left; 
    margin: 30px 5px 0 0; 
} 

#tagline { 
    width: 470px; 
    height: 400px; 
    float: left; 
    margin: 30px 0 0 0; 

} 

.tagline1 { 
    width: 379px; 
    height: 102px; 
    background-image: url('http://littleboxcreative.com/img/tagline1.png'); 
    margin: 0 auto; 
} 

#headline { 
    border-top: 1px solid #080b10; 
    border-bottom: 1px solid #252e44; 
    height: 1px; 
    width: 370px; 
    margin: 40px 0 0 50px; 
} 

.tagline2 { 
    width: 407px; 
    height:96px; 
    background-image: url('http://littleboxcreative.com/img/tagline2.png'); 
    margin: 50px 0 0 36px; 
} 

#services { 
    width:960px; 
    height: 500px; 
    background-image: url('http://littleboxcreative.com/img/niceback.jpg'); 
    -webkit-border-radius: 10px; 
    -moz-border-radius: 10px; 
    border-radius: 10px; 
    -moz-box-shadow: -5px -5px 15px #000; 
    -webkit-box-shadow: -5px -5px 15px #000; 
    box-shadow: -5px -5px 15px #000; 

} 

#portfolio { 
    width: 960px; 
    height: 500px; 
    background-image: url('http://littleboxcreative.com/img/paperback.png'); 
    -webkit-border-radius: 10px; 
    -moz-border-radius: 10px; 
    border-radius: 10px; 
    -moz-box-shadow: -5px -5px 15px #000; 
    -webkit-box-shadow: -5px -5px 15px #000; 
    box-shadow: -5px -5px 15px #000; 


} 

#innerbody { 
    width: 960px; 
    min-height:500px; 
    height: 100%; 
    background-image: url('http://littleboxcreative.com/img/backpattern.gif'); 
    -webkit-border-radius: 0 0 10px 10px; 
    -moz-border-radius: 0 0 10px 10px; 
    border-radius: 0 0 10px 10px; 
    -moz-box-shadow: -5px -5px 15px #000; 
    -webkit-box-shadow: -5px -5px 15px #000; 
    box-shadow: -5px -5px 15px #000; 

} 

#welove { 
    width: 900px; 
    height: 200px; 
    margin: 45px 0 0 30px; 
    background-color: #000000; 
    opacity: 0.6; 
    -webkit-border-radius: 10px; 
    -moz-border-radius: 10px; 
    border-radius: 10px; 

}

来源

2010-10-02 Davey