.u-section-1 {
  background-image: url("images/404.jpg");
  min-height: 710px;
  background-position: 50% 50%;
}

@media (max-width: 1199px) {
   .u-section-1 {
    min-height: 410px;
  }
}

@media (max-width: 991px) {
   .u-section-1 {
    min-height: 354px;
  }
}

@media (max-width: 767px) {
   .u-section-1 {
    min-height: 293px;
  }
}

@media (max-width: 575px) {
   .u-section-1 {
    min-height: 225px;
  }
}