.as .desktop {
  display: none;
}

@media (min-width: 728px) {
  .as .desktop {
    display: block;
  }

  .as .mobile {
    display: none;
  }
}

body {
  background: #6000ff;
  display: flex;
  flex-direction: column;
}

@media (min-width: 1024px) {
  .as {
    flex: 1 0 100%;
  }
}

.as img {
  max-width: 100%;
  display: block;
  margin: 0 auto;
}

.download-image,
.download-btn {
  margin: 20px 0;
}

@media (min-width: 728px) {
  .download-image,
  .download-btn {
    padding: 20px;
  }
}

.download-btn img {
  max-width: 180px;
}