@media only screen and (device-width: 375px) and (device-height: 812px) {
  .blank {
    height: 1.5rem;
  }
  .bom_box {
    width: 100%;
    height: 1.5rem;
    position: fixed;
    bottom: 0;
    left: 0;
    z-index: 2019;
    background: #266694;
  }
}
@media screen and (max-width: 414px) {
  .banner .swiper-pagination-bullet {
    width: 6px;
    height: 6px;
  }
}