.bannerSwiper {
  width: 100%;
  height: 300px;
}

.bannerSwiper .swiper-slide {
  text-align: center;
  font-size: 18px;
  background: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
}

.bannerSwiper .swiper-slide img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.bannerSwiper .swiper-button-next,.bannerSwiper .swiper-button-prev {
  width: calc(var(--swiper-navigation-size) / 20* 27);

}

.bannerSwiper .swiper-button-next:after,.bannerSwiper .swiper-button-prev:after {
  font-size: 10px;
  height: 30px;
  width: 30px;
  border-radius: 50%;
  background-color: rgba(91, 112, 136, .5);
  color: #fff;
  text-align: center;
  line-height: 30px;
}