.poster-main {
  width: 1000px;
  height: 500px;
  position: relative;
  margin: 0 auto;
}

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

.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;
  z-index: 10;
  cursor: pointer;
}

.poster-main .poster-prev-btn {
  width: 100px !important;
  left: -85px;
  background: url(../images/left_2.png) no-repeat center center;
}

.poster-main .poster-next-btn {
  width: 100px !important;
  right: 85px;
  background: url(../images/right_2.png) no-repeat center center;
}