@keyframes box-am{
				from{
					transform: rotateX(-10deg) rotateY(0deg);
				}
				to{
					transform: rotateX(-10deg) rotateY(360deg);
				}
			}
			body {
				background-color: black;
			}

			#box2 {
				width: 250px;
				height: 250px;
				border: 2px solid white;
				/* 以浏览器定位 */
				position: fixed;
				left: calc(50% - 125px);
				top: calc(50% - 125px);
				/* 变成3D空间 */
				transform-style: preserve-3d;
				transform: rotateX(30deg);
				animation-name: box-am;
				animation-duration: 10s;
				animation-iteration-count: infinite;
				animation-iteration-count: linear;
				
				transform: rotateX(10deg) rotateY(10deg)
				animation-name: box-am;
				animation-duration: 10s;
				animation-iteration-count: infinite;
				animation-iteration-count: linear;
				
			}

			#box2>img {
				width: 100%;
				height: 100%;
				/* 绝对定位，以外边的box2为标准进行位置设置 */
				position: absolute;
				left: 0px;
				top: 0px;
			}

			#box2>img:nth-child(1) {
				transform: translateZ(125px);
			}

			#box2>img:nth-child(2) {
				transform: rotateY(180deg) translateZ(125px);
			}
			#box2>img:nth-child(3) {
				transform: rotateY(90deg) translateZ(125px);
			}
			#box2>img:nth-child(4) {
				transform: rotateY(270deg) translateZ(125px);
			}
			#box2>img:nth-child(5) {
				transform: rotateX(90deg) translateZ(125px);
			}
			#box2>img:nth-child(6) {
				transform: rotateX(270deg) translateZ(125px);
			}
			/* 前6张图片设置透明度 */
			#box2>img:nth-child(-n+6) {
				opacity: 0.4;
			}
			/* ---------------------------------- */
			#box2>img:nth-child(7) {
				transform: scale3d(0.5,0.5,0.5) translateZ(125px);
			}
			#box2>img:nth-child(8) {
				transform: scale3d(0.5,0.5,0.5) rotateY(180deg) translateZ(125px);
			}
			#box2>img:nth-child(9) {
				transform: scale3d(0.5,0.5,0.5) rotateY(90deg) translateZ(125px);
			}
			#box2>img:nth-child(10) {
				transform: scale3d(0.5,0.5,0.5) rotateY(270deg) translateZ(125px);
			}
			#box2>img:nth-child(11) {
				transform: scale3d(0.5,0.5,0.5) rotateX(90deg) translateZ(125px);
			}
			#box2>img:nth-child(12) {
				transform: scale3d(0.5,0.5,0.5) rotateX(270deg) translateZ(125px);
			}