@keyframes box-ani {
    from{
        transform: rotateX(-10deg) rotateY(0deg);
    }
    to{
        transform: rotateX(-10deg) rotateY(360deg);
    }
    
}
body {
    background-color: palevioletred;
    /* 背景颜色 */
}

#box {
    /* 设置边框 */
    /* border: 2px solid palevioletred; */
    height: 250px;
    width: 200px;
    /* 设置定位 ,固定定位，一浏览器标准进行定位*/
    position: fixed;
    left: calc(50% - 100px);
    top: calc(50% - 125px);
    /* 左负右正，上负下正 */
    transform-style: preserve-3d;
    transform: rotateX(-10deg) rotateY(20deg);
    /* 位移 translate: 旋转 rotate:  */
    /* 使用定义好的动画 */
    animation-name: box-ani;
    /* 持续时间 次数 效果 等属性*/
    animation-duration: 5s;
    animation-iteration-count: infinite;
    animation-timing-function: linear;
    animation-play-state: paused;
    
}

#box>img {
    width: 100%;
    height: 100%;
    /* 绝对定位，以父级为标准定位 */
    position: absolute;
    /* box阴影 */
    box-shadow: 0px 0px 10px 10px white;
    -webkit-box-reflect: below 0px -webkit-gradient(linear, left top, left bottom, from(transparent), to(rgba(250, 250, 250, 0.6)));
}

#box>img:nth-child(1) {
    transform: rotateY(30deg) translateZ(800px);
}

#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);