/* PC用 */
@media screen and (min-width: 768px) , print {
  .option_imgchange , .option_imgchange2 {
    display: flex;
    margin: 10px auto;
    position: relative;
  }
  .option_imgchange {
    padding-top: 200px;
  }
  .option_imgchange2 {
    padding-top: 250px;
  }
}

/* 小さい画面用 */
@media screen and (max-width: 767px) {
  .option_imgchange , .option_imgchange2 {
    display: flex;
    margin: 10px auto;
    width: 300px;
    max-width: 100%;
    position: relative;
  }
  .option_imgchange {
    padding-top: 160px;
  }
  .option_imgchange2 {
    padding-top: 250px;
  }
}

/* 共通 */
.option_imgchange_img {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translate(-50%, 0);
  opacity: 0;
  transition: opacity 0.3s ease-in-out;
}
.option_imgchange_thumb {
  padding-top: 6px;
  margin: 6px;
  display: block;
  text-align: center;
  font-size: 0.8em;
}
.option_imgchange_selector {
  position: absolute;
  opacity: 0;
  visibility: hidden;
}
.option_imgchange_selector:checked + .option_imgchange_img {
  opacity: 1;
}
.option_imgchange_selector:checked ~ .option_imgchange_thumb > img {
  box-shadow: 0 0 0 4px #CCCCCC;
}