<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
*{
margin: 0;
padding: 0;
}
li, a{
text-decoration: none;
list-style: none;
color:#787878;
}
.nav{
width:1000px;
height:50px;
border:1px solid #ccc;
margin:0 auto;
line-height:50px;
margin-top:50px;
}
/* 导航1 */
.nav1 a{
width:70px;
height:100%;
float:left;
margin:0 15px;
position: relative;
text-align: center;
}
.nav1 a span{
margin:auto;
display:inline-block;
position: absolute;
bottom:5px;
left:0;
right:0;
width:0px;
height:2px;
background:#ff0000;
transition: .5s;
border-radius:50px;
}
.nav1 a:hover span{
width:100%;
}
/* 导航2 */
.nav2 a{
width:70px;
height:100%;
float:left;
margin:0 15px;
position: relative;
text-align: center;
}
.nav2 a span{
margin:auto;
display:inline-block;
position: absolute;
bottom:5px;
left:0;
width:0px;
height:2px;
background:#ff0000;
transition: .5s;
border-radius:50px;
}
.nav2 a:hover span{
width:100%;
}
</style>
</head>
<body>
<ul class="nav nav1">
<li>
<a href="#">导航1
<span></span>
</a>
</li>
<li>
<a href="#">导航2
<span></span>
</a>
</li>
<li>
<a href="#">导航3
<span></span>
</a>
</li>
<li>
<a href="#">导航4
<span></span>
</a>
</li>
<li>
<a href="#">导航5
<span></span>
</a>
</li>
<li>
<a href="#">导航6
<span></span>
</a>
</li>
</ul>
<ul class="nav nav2">
<li>
<a href="#">导航1
<span></span>
</a>
</li>
<li>
<a href="#">导航2
<span></span>
</a>
</li>
<li>
<a href="#">导航3
<span></span>
</a>
</li>
<li>
<a href="#">导航4
<span></span>
</a>
</li>
<li>
<a href="#">导航5
<span></span>
</a>
</li>
<li>
<a href="#">导航6
<span></span>
</a>
</li>
</ul>
</body>
</html>CSS-鼠标经过文字底部下划线动画
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转载自blog.csdn.net/weixin_40002964/article/details/88100934
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