body,
html {
  width: 100%;
  height: 100%;
  background-color: #fff;
}
body {
  width: 100%;
  height: 100%;
  position: relative;
}
.main {
  width: 48rem;
  height: 27rem;
  position: absolute;
  top: 0;
  left: 0;
  background: url("../images/bg-pc.jpg") no-repeat;
  background-size: 100%;
}
.main .downTip {
  width: 15.7rem;
  height: 1.73rem;
  position: absolute;
  top: 20.5rem;
  left: 2.2rem;
}
.main .downTip .google {
  width: 5.25rem;
  height: 1.73rem;
  position: absolute;
  top: 0;
  left: 4.83rem;
  cursor: pointer;
}
.main .downTip .apple {
  width: 4.53rem;
  height: 1.73rem;
  position: absolute;
  top: 0;
  left: 0;
  cursor: pointer;
}
.main .downTip .apk {
  width: 5.45rem;
  height: 1.73rem;
  position: absolute;
  top: 0;
  right: 0;
  cursor: pointer;
}
@media screen and (max-width: 486px) {
  .main {
    width: 18.75rem;
    height: 33.35rem;
    position: absolute;
    top: 0;
    left: 0;
    background: url("../images/bg-mob.jpg") no-repeat;
    background-size: 100%;
  }
  .main .downTip {
    width: 15.72rem;
    height: 1.63rem;
    position: absolute;
    top: 8.8rem;
    left: 1.9rem;
  }
  .main .downTip .google {
    width: 5.28rem;
    height: 1.63rem;
    position: absolute;
    top: 0;
    left: 4.83rem;
  }
  .main .downTip .apple {
    width: 4.53rem;
    height: 1.63rem;
    position: absolute;
    top: 0;
    left: 0;
  }
  .main .downTip .apk {
    width: 5.45rem;
    height: 1.63rem;
    position: absolute;
    top: 0;
    right: 0;
  }
}