* {
	margin: 0;
	padding: 0;
}

body {
	background: #333;
}

ul {
	width: 300px;
	height: 300px;
	position: absolute;
	top: 0;
	bottom: 0;
	left: 0;
	right: 0;
	margin: auto;
	/*3d空间*/
	transform-style: preserve-3d;
	animation: box 20s linear infinite;
}

@keyframes box {

	/*3d旋转 x y z deg*/
	from {
		transform: rotate3d(0, 0, 0, 0deg);
	}

	to {
		transform: rotate3d(1, 1, 1, 360deg);
	}
}

li {
	width: 300px;
	height: 300px;
	list-style: none;
	border: 1px solid black;
	position: absolute;
	opacity: 0.8;
	box-shadow: 0px 0px 10px white;
}

li:nth-child(1) {
	background: url(../img/danji.jpg);
	background-position: center;
	background-size: cover;
	transform: translateZ(150px);
}

/*后*/
li:nth-child(2) {
	background: url(../img/donghuang.jpg);
	background-position: center;
	background-size: cover;
	transform: translateZ(-150px);
}

/*左*/
li:nth-child(3) {
	background: url(../img/luban.jpg);
	background-position: center;
	background-size: cover;
	transform: rotateY(90deg) translateZ(-150px);
}

/*右*/
li:nth-child(4) {
	background: url(../img/libai.jpg);
	background-position: center;
	background-size: cover;
	transform: rotateY(90deg) translateZ(150px);
}

/*上*/
li:nth-child(5) {
	background: url(../img/kai.jpg);
	background-position: center;
	background-size: cover;
	transform: rotateX(90deg) translateZ(150px);
}

li:nth-child(6) {
	background: url(../img/sunwukong.jpg);
	background-position: center;
	background-size: cover;
	transform: rotateX(90deg) translateZ(-150px);
}

ul:hover {
	animation-play-state: paused;
}