.block-useful {
  margin-bottom: 80px;
}
.block-useful__swiper .swiper-wrapper .swiper-slide {
  height: auto;
}
.block-useful .navigations {
  display: flex;
  align-items: center;
  margin-top: 30px;
}
.block-useful .navigations .swiper-button-prev {
  margin-right: 20px;
  margin-left: auto;
}

@media (max-width: 991px) {
  .block-useful {
    margin-bottom: 40px;
  }
}