.caroursel{margin:50px auto;}
.poster-main{position: relative;width: 900px;height: 400px}
.poster-main a,.poster-main img{display:block;}
.poster-main .poster-list{width: 1000px;height: 400px; list-style: none;}
.poster-main .poster-list .poster-item{position: absolute;left: 0px;top: 0px}
.poster-main .poster-btn{position: absolute;height: 100%;width:100px;top: 0px;z-index: 10;opacity: 0.3;}
.poster-main .poster-prev-btn{left: 0px;background: url("img/btn_l.png") no-repeat center center;}
.poster-main .poster-next-btn{right: 0px;background: url("img/btn_r.png") no-repeat center center;}
.poster-item {box-shadow: 1px 1px 15px #000000; border: 4px #FFFFFF solid;}