.download {
  position: fixed;
  bottom: 0.8rem;
}

.download .btn {
  width: 6.1rem;
  animation: a-loop 0.7s infinite linear;
  transform: scale(0.96);
}

.bar {
  position: fixed;
  max-width: 7.5rem;
}

.bar .btn {
  right: 0.2rem;
  top: 0.2rem;
  bottom: 0.2rem;
  width: 2.8rem;
}