main{background: #3b89fd;font-size: .24rem;overflow: hidden;}
main img{width:6.4rem;margin:0 auto;}
.app_div{overflow: hidden;}
.dowl{position: fixed;bottom:  0;color:  #fff;font-size:  .24rem;width:  6.4rem;left:  0;right:  0;margin:  0 auto;border-radius: .3rem .3rem 0 0;background: #3b89fd;}
.xz_app{font-weight: 700;color: #3b89fd;background:  #fff;font-size:  .28rem;width: 4.5rem;height: .8rem;line-height: .8rem;display:  block;text-align:  center;margin: .5rem auto;border-radius:  .3rem;}
.dk_app{color:  #fff;text-decoration: underline;width:  100%;text-align:  center;display:  block;margin: .2rem 0;}