.jianju {
    width: 1200px;
    height: 220px;
}

.poster-main {
    position: relative;
    margin: 0 auto;
}
.poster-main .poster-list .poster-item {
    position: absolute;
    left: 0;
    top: 0;
}
.poster-main .poster-btn {
    position: absolute;
    top: 0;
    cursor: pointer;
}
.poster-main .poster-prev-btn {
    left: 0;
    background: url("../image/zbprev.png") no-repeat center center;
}
.poster-main .poster-next-btn {
    right: 0;
    background: url("../image/zbnext.png") no-repeat center center;
}