section#tech img{
width: auto !important;
max-width: 100%;
margin: 0 auto;
}

.only-sp {
  display: none !important;
}

@media screen and (max-width: 769px) {
  .only-pc {
    display: none !important;
  }

  .only-sp {
    display: block !important;
  }
}