#contents .subSection .subNav .layCol01,
#contents .subSection .subNav .layCol02 {
    width: 100%;
    max-width: 460px;
}

@media only screen and (max-width: 768px) {
  #contents.responsive img {
    width: unset!important;
  }
  .service_box > div {
    width: 48%;
    margin: 1%;
  }
  .service_box .box a {
    width: 100%;
    margin: 0;
  }
  
  #contents .subSection .subNav .layCol01,
  #contents .subSection .subNav .layCol02 {
    float: unset;
  }
}