1.效果
2.代码
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
*{
margin: 0;
padding: 0;
}
ul,li{
list-style: none;
}
.nav ul{
}
.nav ul li{
width: 120px;
height: 40px;
line-height: 40px;
text-align: center;
float: left;
margin: 5px;
background-color: #ccc;
cursor: pointer;
}
.nav ul li:hover>div{
display: block;
animation: slideInUp .5s both 1;
}
.nav ul li>div{
display: none;
border: 1px solid red;
}
@keyframes slideInUp{
0%{
transform: translateY(20px);
opacity: 0;
}
100%{
transform: translateY(0);
opacity: 1;
}
}
</style>
</head>
<body>
<div class="nav">
<ul>
<li>
春
<div class="seconde">
<div>一月</div>
<div>二月</div>
<div>三月</div>
<div>四月</div>
</div>
</li>
<li>
夏
<div class="seconde">
<div>一月</div>
<div>二月</div>
<div>三月</div>
<div>四月</div>
</div>
</li>
<li>
秋
<div class="seconde">
<div>一月</div>
<div>二月</div>
<div>三月</div>
<div>四月</div>
</div>
</li>
<li>
冬
<div class="seconde">
<div>一月</div>
<div>二月</div>
<div>三月</div>
<div>四月</div>
</div>
</li>
</ul>
</div>
</body>
</html>
