.bannerbox {
  height: 750px;
  overflow: hidden;
}
.bannerbox .banner {
  position: relative;
  width: 100%;
  height: 750px;
  overflow: hidden;
  margin: 0 auto;
}
.bannerbox .banner .bannerContent {
  position: relative;
}
.bannerbox .banner .bannerContent .banner_item {
  display: none;
  transition-duration: 0.2s;
  transition-property: opacity;
  transition-timing-function: ease;
}
.bannerbox .banner .bannerContent .banner_item a {
  display: block;
  width: 100%;
  height: 750px;
  text-align: center;
  margin: 0 auto;
}
.bannerbox .banner .bannerContent .banner_active {
  display: block;
}
.bannerbox .banner .bannerContent .banner_active a {
  background-repeat: no-repeat;
  background-position: center;
  background-size: cover ;
}
.bannerbox .banner .navigator {
  position: relative;
  bottom: 35px;
  margin: 0 auto;
  z-index: 100;
  height: 50px;
  left: 0;
  right: 0;
  width: 30%;
}
.bannerbox .banner .navigator .navigator_list {
  height: 50px;
  width: 30%;
  text-align: center;
  margin: 0 auto;
}
.bannerbox .banner .navigator .navigator_list .navigator_item {
  float: left;
  width: 10px;
  height: 10px;
  border-radius: 10px;
  margin: 0 10px;
  line-height: 5px;
  opacity: 0.9;
  background: #e5e5e5;
  text-align: center;
  cursor: pointer;
  *display: inline;
  border: 2px solid #fff;
}
.bannerbox .banner .navigator .navigator_list .navigator_item_active {
  opacity: 0.9;
  background: #144995;
  position: relative;
}