.box_set {
    width: 953px;
    margin: 0 auto 20px;
}
.box_set div.w2 {
    width: 49.5%;
}
.box_set div.w2 span {
    font-size: 18px;
    color: #00c;
    font-weight: bold;
}
ul.disc li {
    font-weight: bold;
}
@media screen and (max-width: 820px) {
  .box_set {
    width: 98%;
  }
  ul.disc li {
    font-size: 16px;
  }
  .kantogen_ct {
    background-color: #ebf1fb;
  }
  .box_set div.w2 {
    width: 100%;
  }
}