.chara_text_area {
  font-size: 16px;
}
.explain_area {
  width: 56%;
}
@media screen and (max-width: 800px) {
  .explain_area {
    width: 93%;
  }
  .chara_text_area {
    /*font-size: 2vw;*/
    font-size: 15px;
  }
}