section img {
  width: 600px;
  height: 360px;
  margin: 20px;
}

@media (max-width: 600px) {
  section img {
    width: 480px;
    height: 288px;
  }
}

@media (max-width: 480px) {
  section img {
    width: 320px;
    height: 192px;
  }
}

@media (max-width: 320px) {
  section img {
    width: 200px;
    height: 120px;
  }
}