.clearfix:after {
  visibility: hidden;
  display: block;
  font-size: 0;
  content: " ";
  clear: both;
  height: 0;
}

.clearfix { zoom: 1; }

.container { margin:150px auto; width:1000px;}

.poster-main {
  width: 1000px;
  height: 400px;
  position: relative;
  margin: 0 auto;
}

.poster-main img{ border:0px solid #fff; }

.poster-main a, .poster-main img { display: block;}

.poster-main .poster-list {
  width: 1000px;
}

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

.poster-main .poster-btn {
  position: absolute;
  top: 0;
  z-index: 10;
  cursor: pointer;
}

.poster-main .poster-prev-btn {
  left: 0;

}

.poster-main .poster-next-btn {
  right: 0;

}