@media (max-width: 767px) {
  .main {
    margin-top: 94px;
  }
}
@media (min-width: 768px) {
  .main {
    margin-top: 88px;
  }
}

.footer {
  position: relative;
}
.footer:after {
  content: "";
  z-index: -1;
  position: absolute;
  top: -510px;
  left: 0;
  right: 0;
  background: url(../../common/img/contact_bg.png) no-repeat center top;
  background-size: 100% 100%;
  height: 902px;
}
@media (max-width: 767px) {
  .footer:after {
    background-image: url(../../common/img/contact_bg_sp.png);
    height: 608px;
    top: -244px;
  }
}