.banner_box{
    position: relative; /*attention*/
    width: 100%;
    height: 480px;
    overflow: hidden;
}
.banner_images{
    position: absolute; /*attention*/
    left: 0;
    width: 400%; /*attention please*/
}
.banner_img{
    float: left;
    width: 25%; /*attention please*/
    height: 480px;
}
.banner_img img{
    width: 100%;
    height: 480px;
}
 
.switcher{
    position: absolute;
    top: 285px;
    width: 100%;
    display: none;
}
.switcher p{
    height: 50px;
    width: 50px;
    line-height: 50px;
    text-align: center;
    color: #fff;
    font-size: 30px;
    background: rgba(0, 0, 0, .8);
    border-radius: 50%;
    cursor: pointer;
}
.switcher .prev{
    float: left;
    margin-left: 50px
}
.switcher .next{
    float: right;
    margin-right: 50px;
}
.banner_box:hover .switcher{
    display: block;
}
.points{
    position: absolute;
    left: 50%;
    bottom: 30px;
    width: 400px;
    margin-left: -200px;
    overflow: hidden;
}
.points li{
    width: 100px;
    height: 5px;
    background: rgba(0, 0, 0, .8);
    float: left;
    list-style: none;
    cursor: Crosshair;
}
.points li.point_on{
    background: #C92027;
}