.poster-main {
  position: relative;

}

.poster-main a, .poster-main img { display: block; width: 100%; height: 100%;}
.poster-main img{ }
.poster-main .poster-list {
  width: 1000px;
  height: 500px;
}

.poster-main .poster-list .poster-item {
  width: 200px;
  height: 500px;
  position: absolute;
  left: 0;
  top: 0;
 
}

.poster-main .poster-btn {
  position: absolute;
  top: 0;
  cursor: pointer;
  filter: opacity(.5) brightness(1);
}
.poster-main .poster-btn:hover{ filter: opacity(1) brightness(2); }

.poster-main .poster-prev-btn {
  left: 0;
  background: url(../images/left.png) no-repeat center center;
}

.poster-main .poster-next-btn {
  right: 0;
  background: url(../images/right.png) no-repeat center center;
}
.poster-item-title{
  font-size: 18px;
  text-align: center;
  line-height: 48px;
  display: block;
  position: relative;
  margin-top: -48px;
}