/*定义一个动画*/
			@keyframes box-ani {
				from {
					transform: rotateX(-10deg) rotateY(0deg);
				}

				to {
					transform: rotateX(-10deg) rotateY(360deg);
				}
			}

			body {
				/*背景为 色*/
				background-color: white;
			}

			/*#box相当于id=“box”*/
			#box {
				border: 0px solid white;
				height: 250px;
				width: 200px;
				/*固定定位，以浏览器为标准进行定位*/
				position: fixed;
				left: calc(50% - 100px);
				top: calc(50% - 125px);
				/*把盒子变成3d*/
				transform-style: preserve-3d;
				transform: rotatex(-10deg);
				/*使用刚刚定义好的动画*/
				animation-name: box-ani;
				animation-duration: 8s;
				animation-iteration-count: infinite;
				animation-timing-function: linear;
			}

			#box>img {
				width: 100%;
				height: 100%;
				/*绝对定位，以父级为标准*/
				position: absolute;
				left: 0px;
				top: 0px;
				/*添加阴影*/
				box-shadow: 0px 0px 20px 10px purple;
				-webkit-box-reflect: below 10px -webkit-gradient(linear, left top, left bottom, from(transparent), to(rgba(250, 250, 250, 0.7)))
			}

			/*第一张照片*/
			#box>img:nth-child(1) {
				transform: rotateY(30deg)translatez(800px);
			}

			/*第二张照片*/
			#box>img:nth-child(2) {
				transform: rotateY(60deg)translatez(800px);
			}

			#box>img:nth-child(3) {
				transform: rotateY(90deg)translatez(800px);
			}

			#box>img:nth-child(4) {
				transform: rotateY(120deg)translatez(800px);
			}

			#box>img:nth-child(5) {
				transform: rotateY(150deg)translatez(800px);
			}

			#box>img:nth-child(6) {
				transform: rotateY(180deg)translatez(800px);
			}

			#box>img:nth-child(7) {
				transform: rotateY(210deg)translatez(800px);
			}

			#box>img:nth-child(8) {
				transform: rotateY(240deg)translatez(800px);
			}

			#box>img:nth-child(9) {
				transform: rotateY(270deg)translatez(800px);
			}

			#box>img:nth-child(10) {
				transform: rotateY(300deg)translatez(800px);
			}

			#box>img:nth-child(11) {
				transform: rotateY(330deg)translatez(800px);
			}

			#box>img:nth-child(12) {
				transform: rotateY(360deg)translatez(800px);
			}