#zhuanpan{width: 78vh;height: 78vh;margin: 11vh auto;position: absolute;top:0;z-index: 1;overflow: hidden;}
#zhuanpan #my_dazhuanpan{width: 100%;}
#zhuanpan .start_but{position:absolute;width:25vh;height:25vh;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:89%;height:89%;z-index: -1;left:0;right: 0;top:0;bottom: 0;margin: auto;}

.img_6{width: 1.5rem;z-index: 1}
.img_7{width: 50px;height: 50px}