*{
    padding: 0;
    margin: 0;
}
.box{
    overflow: hidden;
    position: relative;
    width:100%;
    margin: 0 auto 5% auto;
    height: 249px;
}
.box{
    /*max-width: 265px;  !***   这里的max-width值就是图片的宽度，暂不支持百分比   ***!*/
}
li{
    float: left;
    list-style: none;
}
ul{
    position: relative;
    /*left: 0;*/
}
.next{
    cursor:pointer;
    opacity: 0;
    position: absolute;
    right: 0;
    background: url("img/next.png");
    width: 50px;
    height: 45px;
    display: block;
    line-height: 80px;
}
.prev{
    cursor:pointer;
    opacity: 0;
    background: url("img/prev.png");
    display: block;
    position: absolute;
    width: 50px;
    height: 45px;
    text-align: center;
    line-height: 80px;
}
.prev,.next{
    transition: all 0.5s;
}
.next:hover,.prev:hover{
    -webkit-transform: scale(1.2,1.2);
    -moz-transform: scale(1.2,1.2);
    -ms-transform: scale(1.2,1.2);
    -o-transform: scale(1.2,1.2);
    transform: scale(1.2,1.2);
    opacity: 1!important;
    transition: all 0.3s;
}