#zhuanpan{width: 8rem;
    height: 8rem;
    margin: 1rem auto;
    position: relative;
    top: 0;
    z-index: 1;
    overflow: hidden;}
#zhuanpan #my_dazhuanpan{position: absolute;left: 50%;top: 50%;transform: translate3d(-50%,-50%,0);}
#zhuanpan .start_but{    position: absolute;
    width: 2rem;
    height: 2rem;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: auto;}
#zhuanpan .zhuanpan-r1{position:absolute;width:100%;height:100%;left:0;right: 0;top:0;bottom: 0;margin: auto;z-index: -1}
#zhuanpan .zhuanpan-r2{position:absolute;width:84%;height:84%;z-index: -1;left:0;right: 0;top:0;bottom: 0;margin: auto;}