.u-section-1 {
  background-image: url("images/saemi2.jpg");
  background-position: 50% 50%;
}

.u-section-1 .u-sheet-1 {
  min-height: 400px;
}

@media (max-width: 767px) {
  .u-section-1 .u-sheet-1 {
    min-height: 386px;
  }
}

@media (max-width: 575px) {
  .u-section-1 .u-sheet-1 {
    min-height: 293px;
  }
}