还在用IE8及其以下版本浏览器的童鞋们就不要尝试了。
<!DOCTYPE HTML>
<html>
<head>
<style type="text/css">
#windmill{
160px;
height:160px;
position:relative;
-moz-transition:-moz-transform 2s ease-in-out;
-webkit-transition:-webkit-transform 2s ease-in-out;
-moz-transform:rotate(0deg);
-webkit-transform:rotate(0deg);
}
#windmill:hover{
-moz-transform:rotate(960deg);
-webkit-transform:rotate(960deg);
}
#windmill div.top{
40px;
height:80px;
left:40px;
top:0px;
border-top-left-radius:40px;
}
#windmill div.right{
80px;
height:40px;
left:80px;
top:40px;
border-top-right-radius:40px;
}
#windmill div.bottom{
40px;
height:80px;
left:80px;
top:80px;
border-bottom-right-radius:40px;
}
#windmill div.left{
80px;
height:40px;
left:0px;
top:80px;
border-bottom-left-radius:40px;
}
#windmill div.ala{
position:absolute;
-moz-box-sizing:border-box;
-webkit-box-sizing:border-box;
background:rgba(0,0,255,0.4);
border:1px solid rgba(0,0,255,0.5);
-moz-transition:background-color 1s linear;
-webkit-transition:background-color 1s linear;
}
#windmill div.ala:hover{
background-color:#00F;
}
.alaIn{
position:absolute;
background:rgba(255,255,255,0.7);
-moz-box-sizing:border-box;
-webkit-box-sizing:border-box;
-moz-transition:background-color 1s linear;
-webkit-transition:background-color 1s linear;
left:0;
top:0;
}
.alaIn:hover{
background-color:rgba(255,255,255,0.9);
}
.topIn{
border-bottom-left-radius:40px;
}
.rightIn{
border-top-left-radius:40px;
}
.bottomIn{
border-top-right-radius:40px;
}
.leftIn{
border-bottom-right-radius:40px;
}
</style>
</head>
<body>
<div id="windmill">
<div class="top ala"></div><div class="top topIn alaIn"></div>
<div class="right ala"></div><div class="right rightIn alaIn"></div>
<div class="bottom ala"></div><div class="bottom bottomIn alaIn"></div>
<div class="left ala"></div><div class="left leftIn alaIn"></div>
</div>
</body>
</html>