.u-section-1 {
  background-image: url("https://assets.nicepagecdn.com/d8ef0a97/6517746/images/trangchu.png");
  background-position: 50% 50%;
}

.u-section-1 .u-sheet-1 {
  min-height: 615px;
}

@media (max-width: 1199px) {
  .u-section-1 .u-sheet-1 {
    min-height: 400px;
  }
}

@media (max-width: 767px) {
  .u-section-1 .u-sheet-1 {
    min-height: 373px;
  }
}

@media (max-width: 575px) {
  .u-section-1 .u-sheet-1 {
    min-height: 189px;
  }
}