.slider {
    width: 100%!important;
    height: 800px;
    margin: 0 auto;
    overflow: hidden;
}
.slider-main li{
    width: 100%!important;
}
.slider-main img{
    width: 100%;
    object-fit: cover;
}
/* 切换按钮 */

    /* 上一个 */

.osSlider-main .slider-btn-prev {
    position: absolute;
    z-index: 30;
    top: 50%;
    left: -45px;
    width: 40px;
    height: 40px;
    text-indent: -9999px;
    margin-top: -20px;
    background: url(./img/prev.png) 50% 50% no-repeat;
    transition: all .5s linear;
}
.osSlider-main:hover .slider-btn-prev {

    left: 5px;

}

    /* 下一个 */

.osSlider-main .slider-btn-next {

    position: absolute;

    z-index: 30;

    top: 50%;

    right: -45px;

    width: 40px;

    height: 40px;

    text-indent: -9999px;

    margin-top: -20px;

    background: url(./img/next.png) 50% 50% no-repeat;

    transition: all .5s linear;

}



.osSlider-main:hover .slider-btn-next {

    right: 5px;

}



/* 高亮导航部分 */

.osSlider-main .slider-nav {

    position: absolute;

    width:100%;

    height: 22px;

    bottom: 15px;

    text-align: center;

    z-index: 25;

}

.osSlider-main .slider-nav li {

    display: inline-block;

    height: 20px;

    line-height: 20px;

    padding: 0 6px;

    margin: 0 12px;

    font-size: 12px;

    background: #fff; color: #0158a8;

    border: 1px solid #fff;


    cursor: pointer;

}

.osSlider-main .slider-nav li.active {

      border: 1px solid #0158a8;

    background: #0158a8; color: #fff;

}

.osSlider-main .slider-nav li:hover {

    border: 1px solid #0158a8;
color: #fff;
    background: #0158a8;

}