【需求描述】css实现3D旋转效果，本例摘自网友（css3 3d旋转风车效果）。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>旋转风车</title>
<style>
body {
margin: 0;
padding: 0;
background: #607d8b;
}
.box {
position: absolute;
left: 50%;
top: calc(50% - 150px);
left: calc(50% -100px);
width: 200px;
height: 300px;
transform: perspective(1000px) rotateY(45deg);
transform-style: preserve-3d;
}
.box div {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
animation: myanimate 2.5s linear infinite;
transform-style: preserve-3d;
}
.box div span {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
display: block;
text-align: center;
background: linear-gradient(0deg, #f1f1f1, #bbb, #f1f1f1);
transform-style: preserve-3d;
border-radius: 20px;
}
.box div span:nth-child(1) {
transform: rotateX(0deg);
}
.box div span:nth-child(2) {
transform: rotateX(45deg);
}
.box div span:nth-child(3) {
transform: rotateX(90deg);
}
.box div span:nth-child(4) {
transform: rotateX(-45deg);
}
@keyframes myanimate {
0% {
transform: perspective(1000px) rotateX(0deg);
}
100% {
transform: perspective(1000px) rotateX(360deg);
}
}
</style>
</head>
<body>
<div class="box">
<div>
<span>1</span>
<span>2</span>
<span>3</span>
<span>4</span>
</div>
</div>
</body>
</html>