.banner {
    position: relative;
    height: 700px;
    overflow: hidden;
}
.banner .slider {
    width: 100% !important;
    height: 700px;
    top: 0;
    overflow: hidden;
    position: relative;
    z-index: 1;
}
.banner .slider-main {
    width: 100%;
    height: 100%;
    position: absolute;
    left: 0;
}
.banner .slider-main li {
    width: 100%;
    height: 700px;
}
.i_banner_box img {
    width: 100%;
    height: 700px !important;
}
.banner .osSlider-main .slider-btn-prev {
    position: absolute;
    z-index: 30;
    top: calc(50% - 20px);
    left: -45px;
    width: 40px;
    height: 40px;
    text-indent: -9999px;
    margin-top: -20px;
    background: url(/templates/Images/prev.png) 50% 50% no-repeat;
    transition: all 0.5s linear;
    cursor: pointer;
}
.banner .osSlider-main .slider-btn-next {
    position: absolute;
    z-index: 30;
   top: calc(50% - 20px);
    right: -45px;
    width: 40px;
    height: 40px;
    text-indent: -9999px;
    margin-top: -20px;
    background: url(/templates/Images/next.png) 50% 50% no-repeat;
    transition: all 0.5s linear;
    cursor: pointer;
}
.banner .osSlider-main:hover .slider-btn-prev {
    left: 3%;
}
.banner .osSlider-main:hover .slider-btn-next {
    right: 3%;
    cursor: pointer;
}