.wrap {
width:48px;
height:30px;
border:1px solid #ccc;
position:relative;
}
span {
height:2px;
position:absolute;
color:#484848;
width:30px;
margin:10px 10px;
display:block;
background:#484848;
transition:.5s;
}
span:nth-child(2) {
top:10px
}
.span1 {
position:absolute;
transform:rotate(-46deg);
margin:15px 10px;
height:2px;
transition:.5s;
}
.span2 {
position:absolute;
transform:rotate(45deg);
margin:5px 10px;
height:2px;
transition:.5s;
}
简单常用的相应菜单导航切换按钮动画