@media screen and (max-width: 767.999px) {
  #main_img_area {
    height: 64vw;
    padding: 28.7vw 0 0 30px;
  }
  #main_img_area h1 .ja {
    line-height: 1.29;
  }
  .security_contents {
    padding: 58px 30px 60px;
  }
  .security_contents .description {
    line-height: 1.71;
  }
  .security_contents section.policy {
    margin-top: 36px;
  }
  .security_contents section.policy h2 {
    font-size: 1.8rem;
    line-height: 1.56;
    padding-left: 2em;
    text-indent: -2em;
  }
  .security_contents section.policy p {
    line-height: 1.71;
    margin-top: 17px;
  }
  .security_contents section.policy:nth-of-type(1) {
    margin-top: 70px;
  }
  .security_contents #security_contact {
    margin-top: 53px;
  }
  .security_contents #security_contact h2 {
    padding: 17px 0 15px;
    font-size: 1.6rem;
    line-height: 1.5;
    font-weight: 500;
  }
  .security_contents #security_contact .contact_area {
    padding: 27px 0 40px;
  }
  .security_contents #security_contact .contact_area h3 {
    font-size: 1.4rem;
    text-align: center;
  }
  .security_contents #security_contact .contact_area .tel_area {
    text-align: center;
    margin-top: 11px;
  }
  .security_contents #security_contact .contact_area .tel_area a {
    display: flex;
    justify-content: center;
    align-items: center;
  }
  .security_contents #security_contact .contact_area .tel_area a .tel_icon {
    margin-right: 14px;
    width: 35px;
  }
  .security_contents #security_contact .contact_area .tel_area a .num_area {
    font-size: 3.1rem;
    font-weight: 700;
  }
  .security_contents #security_contact .contact_area .tel_area .time {
    margin-top: 8px;
    font-size: 1.3rem;
  }
  .security_contents #security_contact .contact_area .mail_area {
    margin-top: 32px;
  }
  .security_contents #security_contact .contact_area .mail_area a {
    width: 270px;
    padding: 20px 0 19px;
    border-radius: 35px;
    font-weight: 600;
  }
}