.content {
  padding-top: 90px;
  min-height: calc(100vh - 40px);
}
.content img {
  width: 100%;
  border: none;
  padding: 0;
  margin: 0;
  vertical-align: middle;
}
.content .mobile {
  width: 640px;
  margin: 0 auto;
}
.content .mobile img {
  margin: 60px 0;
}