.act-banners {
  width: 1200px;
  margin: 8px auto;
  height: 280px;
  position: relative;
}
.act-banners .banners-items {
  width: 100%;
  height: 100%;
  position: relative;
}
.act-banners .banners-items:hover + .act-banners-nav .banners-switch {
  background: rgba(0, 0, 0, 0.5);
}
.act-banners .banners-items li {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: none;
  opacity: 0;
}
.act-banners .banners-items li a {
  display: block;
  height: 100%;
}
.act-banners .banners-items li a img {
  height: 100%;
  width: 100%;
  object-fit: cover;
}
.act-banners .banners-items li:first-child {
  display: block;
  opacity: 1;
}
.act-banners .act-banners-nav {
  width: 100%;
  position: relative;
  display: none;
}
.act-banners .act-banners-nav:hover .banners-switch {
  background: rgba(0, 0, 0, 0.5);
}
.act-banners .act-banners-nav .banners-switch {
  position: absolute;
  top: -170px;
  cursor: pointer;
  height: 60px;
  width: 32px;
  text-align: center;
  line-height: 60px;
}
.act-banners .act-banners-nav .banners-switch i {
  font-size: 32px;
  color: #fff;
}
.act-banners .act-banners-nav .banners-switch.left-switch {
  left: 0;
  border-radius: 0 2px 2px 0;
}
.act-banners .act-banners-nav .banners-switch.right-switch {
  right: 0;
  border-radius: 2px 0 0 2px;
}
.act-banners .act-banners-nav .banners-ul {
  position: absolute;
  top: -20px;
  width: 100%;
  text-align: center;
}
.act-banners .act-banners-nav .banners-ul span {
  background-color: #fff;
  border-radius: 5px;
  width: 9px;
  height: 8px;
  cursor: pointer;
  margin-left: 5px;
  transition: width linear 0.3s;
}
.act-banners .act-banners-nav .banners-ul span.active {
  width: 21px;
}