.index-banner-box{
    width: 100%;
    display: block;
    position: relative;
    overflow: hidden;
    margin-top: 75px;
}
.index-banner-box,
.index-banner-list,
.index-video-box,
.index-video,
.index-video-bg{
     height: calc(100vh - 75px);
}
.index-banner-list-box{
    width: 100%;
    display: block;
    position: relative;
    
}
.index-banner-list{
    width: 100%;
    display: block;
     position: relative;
}
.index-banner-list span{
    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: 24px;
    color: #FFF;
    display: block;
    position: absolute;
    letter-spacing: 2px;
    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;
}
.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;
}

/*-----------------------*/
.pages-banner-box{
    width: 100%;
    height: 400px;
    display: block;
    margin-top: 78px;
}
.pages-banner-img-box{
    width: 100%;
    display: block;
    height: 100%;
    overflow: hidden;
}


@media only screen and (max-width: 1000px){
    .pages-banner-box{
        height: 300px;
    }
    .index-banner-slong, .index-video-slong{
        font-size: 18px;
    }
}
@media only screen and (max-width: 550px){
    .pages-banner-box {
        height: 200px;
    }

}
@media only screen and (max-width: 350px){
    .index-banner-slong, .index-video-slong {
        font-size: 14px;
        letter-spacing: 1px;
    }
}