<!DOCTYPEhtml>
<html>
<head>
<title>Demo</title>
<style>
#app{
width:100px;
height:35px;
background-color:#006600;
text-align:center;
line-height:35px;
position:relative;
transform-style:preserve-3d;
transition:all0.3slinear;
}
#app:hover{
transform:rotateX(90deg);
transition:all0.3slinear;
-webkit-transform-origin:50%0;
}
#app:before{
position:absolute;
top:100%;
left:0;
content:attr(data-hover);
width:100px;
height:35px;
transform:rotateX(-90deg);
transition:all0.3slinear;
transform-origin:50%0;
text-align:center;
line-height:35px;
background-color:red;
}
</style>
<div>
<divid="app"data-hover="asdasdasd">
asdasdasd
</div>
</div>
</body>
</html>
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