.ad__couplet,
.ad__buoy {
  position: absolute;
  z-index: 99;
  text-align: center;
}

.ad__couplet {
  top: 40px;
}

.ad__buoy {
  top: 420px;
}

.ad__couplet__left,
.ad__buoy__left {
  left: 4px;
}

.ad__couplet__right,
.ad__buoy__right {
  right: 4px;
}

.ad__couplet__buoy-close_btn {
  font-size: 12px;
  color: #666;
  cursor: pointer;
}

.ad__couplet img:nth-child(2),
.ad__buoy img:nth-child(2) {
  display: none;
}

.ad__couplet__left .ad__couplet-link:hover img:nth-child(1),
.ad__couplet__right .ad__couplet-link:hover img:nth-child(1),
.ad__buoy__left .ad__buoy-link:hover img:nth-child(1),
.ad__buoy__right .ad__buoy-link:hover img:nth-child(1) {
  display: none;
}

.ad__couplet__left .ad__couplet-link:hover img:nth-child(2),
.ad__couplet__right .ad__couplet-link:hover img:nth-child(2),
.ad__buoy__left .ad__buoy-link:hover img:nth-child(2),
.ad__buoy__right .ad__buoy-link:hover img:nth-child(2) {
  display: inline-block;
}

@media (max-width: 750px) {
  .ad__couplet,
  .ad__buoy {
    display: none;
  }

  /* B1 广告 样式重置 */
  #ad-b1-m .swiper-slide {
    flex-shrink: 1;
  }
}

/* 首页 - B3 */
.adB3_item:not(:first-child) {
  display: none;
}