html {
	background-image:linear-gradient(to top,#fbc2eb 0%,#a6c1ee 100%);
	opacity:0.8;
	height:100%;
}
.container {
	margin-top:200px;
	perspective:1000px;
}
.cube {
	height:200px;
	width:200px;
	position:relative;
	margin:auto;
	transform-style:preserve-3d;
	animation:rotate 15s infinite;
}
/*产生旋转，生成立体感*/
    @keyframes rotate {
	from {
	transfrom:rotateY(0deg) rotateX(0deg);
}
to {
	transform:rotateY(360deg) rotateX(360deg);
}
}/*面的样式*/
    .cube > div {
	height:100%;
	width:100%;
	opacity:0.9;
	position:absolute;
	text-align:center;
	background:#333;
	color:#fff;
	line-height:200px;
	font-size:30px;
	border:1px solid #fff;
}
/*沿着中心点往外推 100px*/
    .front {
	transform:translateZ(100px);
}
.back {
	transform:translateZ(-100px);
}
.left {
	transform:rotateY(90deg) translateZ(-100px);
}
.right {
	transform:rotateY(90deg) translateZ(100px);
}
.top {
	transform:rotateX(90deg) translateZ(100px);
}
.bottom {
	transform:rotateX(90deg) translateZ(-100px);
}