@media screen and (max-width: 1439px) {
  #kids_header {
    margin-top: 85px !important;
  }
}
#contents img {
  width: auto;
}
#adult_footer img {
  width: 100%;
}

@media screen and (max-width: 768px) {
  .side_float_btn {
    bottom: 10% !important;
  }
}