图片直接有空隙
<!DOCTYPE html>
<html>
<head>
<title></title>
<style type="text/css">
*{
padding: 0px;
margin:0px;
}
a{
text-decoration: none;
color: white;
}
.container{
width: 100%;
height: 100px;
background:black;
position: fixed;
top: 0;
}
.logo{
height: 100px;
float: left;
}
.nav ul{
margin-right: 150px;
float: right;
}
.nav li{
margin-top: 25px;
list-style-type: none;
float: left;
color: white;
margin-right: 50px;
font-size: 30px;
}
li a:hover {
color:gray;
}
.footer{
position: fixed;
bottom: 0px;
width: 100%;
height: 100px;
background:black;
}
.footer ul{
margin-left:300px;
}
.footer li{
margin-top: 25px;
list-style-type: none;
float: left;
color: white;
margin-right: 50px;
font-size: 30px;
}
.sss{
height: 100px;
width: 100%;
}
.banner{
width: 100%;
height: auto;
}
img{
width: 100%;
}
.banner1,.banner2,.banner3{
padding:0px;
}
</style>
</head>
<body>
<div class="container">
<div class="logo"><a href="#"><img src="http://img1.sycdn.imooc.com/climg//58c0d2d900016ce303000100.png"></a></div>
<div class="nav">
<ul>
<li><a href="#">课程</a></li>
<li><a href="#">职业路径</a></li>
<li><a href="#">实战</a></li>
<li><a href="#">猿问</a></li>
<li><a href="#">手记</a></li>
</ul>
</div>
</div>
<div class="sss"></div>
<div class="banner">
<div class="banner1">
<img src="http://img1.sycdn.imooc.com/climg//58c0eda50001e12416000480.jpg"></div>
<div class="banner2"><img src="http://img1.sycdn.imooc.com/climg//58c0edb80001c9f216000480.jpg"></div>
<div class="banner3">
<img src="http://img1.sycdn.imooc.com/climg//58c0edc9000100d516000480.jpg">
</div>
</div>
<div class="sss"></div>
<div class="footer">
<ul>
<li><a href="#">网站首页</a></li>
<li><a href="#">企业合作</a></li>
<li><a href="#">人才招聘</a></li>
<li><a href="#">联系我们</a></li>
<li><a href="#">罕见问题</a></li>
<li><a href="#">友情链接</a></li>
</ul>
</div>
</body>
</html>
为什么图片中间会有空隙 用margin也去不掉
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