*{
    margin: 0;
    padding: 0;
}
.box{
    width: 100%;
    height: 720px;
    margin: 50px auto;
    overflow: hidden;
    position: relative;
}
.wipper{
    width: 11700px;/*设置为图片的总宽度*/
    height: 720px;
    position: absolute;
    left: 0;
}
.wipper div{
    background-size: cover; /* 或使用 contain, auto, 100% 100% 等 */
    background-position: center; /* 确保图片在容器中居中 */
    width: 1950px;
    height: 720px;
    float: left;
    text-align: center;
    font-size: 30px;
    line-height: 300px;
    color: #fff;
}
.pre,.next{
    width: 20px;
    height: 30px;
    line-height: 30px;
    text-align: center;
    color: #fff;
    background-color: rgba(0, 0, 0, 0.5);
    position: absolute;
    transform: translateY(-50%);
    cursor: pointer;
    display: none;
}
.box:hover .pre{
    display: block;
}
.box:hover .next{
    display: block;
}
.pre{
    left: 0;
    top: 50%;
}
.next{
    right: 0;
    top: 50%;
}
.lis{
    text-align: center;
    border-radius: 5px;
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}
.lis span{
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: #ccc;
}
.lis span.current{
    background-color: greenyellow;

}

.wipper .oneBacJpg{
    background-image: url(../img/novo_log827.jpg);
}
.wipper .twoBacJpg{
    background-image: url(../img/novo_1_1.jpg);
}
.wipper .threeBacJpg{
    background-image: url(../img/novo_121.jpg);
}
.wipper .fourBacJpg{
    background-image: url(../img/novo_1_1.jpg);
}
.wipper .fiveBacJpg{
    background-image: url(../img/novo_1_2.jpg);
}