.index-banner-box{
    width: 100%;
    display: block;
    position: relative;
    overflow: hidden;
}
/* .index-banner-box,
.index-banner-list,
.index-video-box,
.index-video,
.index-video-bg{
    height: calc(calc(2160 / 3840) * 100vw);
} */
.index-banner-list-box{
    width: 100%;
    display: block;
    position: relative;
    
}
.index-banner-list{
    width: 100%;
    display: block;
    position: relative;
}
.index-banner-list img{
    width: 100%;
    object-fit: contain;
}
.index-banner-img{
    height: 100%;
    width: 100%;
    display: block;
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
}
.index-banner{
    width: 100%;
    height: 100%;
    display: block;
    position: relative;
}

.index-banner-slong,
.index-video-slong{
    width: 100%;
    text-align: center;
    font-size: 36px;
    color: #FFF;
    display: block;
    position: absolute;
    z-index: 9;
    top: 48%;
    text-shadow: rgba(0,0,0,0.6) 2px 2px 2px;
    cursor: context-menu;
}
.index-video-mask{
    width: 100%;
    height: 100%;
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    background-color: #000;
    opacity: 0.4;
    z-index: 5;
    pointer-events: none;
}
.index-video-box{
    width: 100%;
    display: block;
    position: relative;
}
.index-video{
    width: 100%;
    height: 100%;
    position: relative;
    z-index: 5;
    display: block;
}

.index-video-bg{
    width: 100%;
    height: 100%;
    display: block;
    position: absolute;
    z-index: 1;
    top: 0;
    left: 0;
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
}

.index-banner-slong-box{
    width: 100%;
    display: block;
    position: absolute;
    top: 48%;
    left: 0;
    z-index: 5;
    pointer-events: none;
    text-align: center;
}
.index-video-open{
    display: none;
}
.index-banner-list-box .slick-prev{
    left: 50px;
    z-index: 9;
} 
.index-banner-list-box .slick-next{
    right: 50px;
    z-index: 9;
}
.index-banner-list-box .slick-prev:before{
    content: '\f053';
    font-weight: bold;
    font-family: "Font Awesome 5 Free";
    display: block;
    font-size: 40px;
}
.index-banner-list-box .slick-next:before{
    content: '\f054';
    font-weight: bold;
    font-family: "Font Awesome 5 Free";
    display: block;
    font-size: 40px;

}

@media only screen and (max-width: 1000px){
    .index-banner-slong, .index-video-slong{
        font-size: 24px;
    }
    .index-banner-list-box .slick-prev{
        left: 20px;
    } 
    .index-banner-list-box .slick-next{
        right: 20px;
    }
    .index-banner-list-box .slick-prev:before{
        font-size: 24px;
    }
    .index-banner-list-box .slick-next:before{
        font-size: 24px;

    }
}
@media only screen and (max-width: 550px){
    .index-banner-slong, .index-video-slong{
        font-size: 16px;
    }
    .index-banner-list-box .slick-prev{
        left: 10px;
        top: 52%;
    } 
    .index-banner-list-box .slick-next{
        right: 10px;
        top: 52%;
    }
    .index-banner-list-box .slick-prev:before{
        font-size: 18px;
    }
    .index-banner-list-box .slick-next:before{
        font-size: 18px;
    }
}