@media screen and (max-width:960px) {
  .layout_container {
    margin-top: 65px;
  }
  .container_section .ttl_h2 {
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 15px;
  }
  .def_lst {
    font-size: 12px;
  }
  .def_lst_dt {
    float: none;
    width: 100%;
    padding-top: 2em;
  }
  .def_lst_dd {
    padding-left: 0px;
    padding-bottom: 2em;
  }
}