.desc_list {
  display: flex;
  flex-direction: column;
}
.desc_list dt {
  width: 6em;
}
.desc_list dd {
  padding: 0 0 15px;
}
.desc_list dd:last-child {
  padding: 0;
}
.txt_fit {
  text-align-last: justify;
}

@media only screen and (min-width: 481px) {
  .desc_list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 20px 15px;
  }
  .desc_list dd {
    width: calc(100% - (6em + 15px));
    padding: 0;
  }  
}