@media screen and (max-width: 767px) {
  .mobile-only {
    display: block !important;
  }

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

@media screen and (min-width: 768px) {
  .mobile-only {
    display: none !important;
  }

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