.page-body {
  position: absolute;
  top: 150px;
  right: 0;
  bottom: 80px;
  left: 0;
  width: 100%;
}
.page-body .banners,
.page-body .item-banner {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}
.page-body .banners {
  overflow: visible;
}
.page-body .banners .item-banner {
  background: #000 none no-repeat center center;
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
  display: none;
}
.page-body .banners .item-banner.active {
  display: block;
}
.page-body .banners-btns {
  position: absolute;
  bottom: 0;
  height: 56px;
  width: 100%;
  background-color: rgba(0, 0, 0, 0.2);
  text-align: center;
  font-size: 0;
  line-height: 56px;
}
.page-body .banners-btns .banner-btn {
  display: inline-block;
  width: 20px;
  height: 7px;
  background-color: #fff;
  margin: 0 5px;
}
.page-body .banners-btns .banner-btn.active {
  background-color: #e72a1a;
}
.index-footer {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
}