(此为慕课学习笔记,方便日后学习)
<html lang="en">
<!--
学习功能:下拉菜单之变幻菜单
author: lisa于2018-5-30
-->
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>下拉菜单</title>
<style type="text/css">
.top-nav {
font-size: 12px;
font-weight: bold;
list-style: none;
border-bottom: 8px solid #DC4E1B;
/*清楚自己的浮动*/
overflow: hidden;
}
.top-nav li {
float: left;
margin-right: 1px;
}
.top-nav li a {
line-height: 20px;
/*去除下划线*/
text-decoration: none;
background-color: #DDD;
color: #666666;
display: block;
width: 80px;
text-align: center;
}
.top-nav li a span {
display: none;
}
.top-nav li a:hover span {
display: block;
background: #DC4E1B;
color: white;
}
.top-nav li a:hover {
margin-top: -20px;
}
</style>
</head>
<body>
<ul class="top-nav">
<li><a href="http://www.imooc.com">首页<span>Home</span></a></li>
<li><a href="http://www.imooc.com">课程大厅<span>Course</span></a></li>
<li><a href="http://www.imooc.com">学习中心<span>Learn</span></a></li>
<li><a href="http://www.imooc.com">关于我们<span>About</span></a></li>
</ul>
</body>
</html>