.floatingBanners{
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: min(320px, calc(100vw - 32px));
}

/* 個々のバナー */
.floatingBanner{
  position: relative;
  border-radius: 5px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0,0,0,.18);
  background: #fff;
}

.floatingBanner__link{ display:block; }
.floatingBanner__img{ display:block; width:100%; height:auto; }

.floatingBanner__close{
  position: absolute;
  top: 6px;
  right: 6px;
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 999px;
  background: rgba(0,0,0,.55);
  color: #fff;
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
}

@media (max-width: 480px){
  .floatingBanners{
    right: 12px;
    bottom: 12px;
    width: min(240px, calc(100vw - 24px));
    gap: 10px;
  }
}