.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: 100vh;
}
.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: 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;
}
.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;
}
.not-banner{
    display: none;
}
.index-banner-scroll{
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}
.index-banner-scroll p{
    font-family: "Lato";
    font-size: 12px;
    color: #fff;
    letter-spacing: 0.06em;
    box-sizing: border-box;
    padding-left: 0.06em;
    transition: all .3s linear;
}
.index-banner-scroll span{
    width: 1px;
    height: 100px;
    display: block;
    margin: 20px auto;
    margin-top: 10px;
    background-color: #fff;
    position: relative;
    transition: all .3s linear;
}
.index-banner-scroll span::before{
    content: '';
    width: 1px;
    height: 12px;
    background-color: #ae2f2f;
    display: block;
    position: absolute;
    bottom: 20%;
    left: 0;
    transform-origin: bottom;
    transform: rotateZ(45deg);
    opacity: 0;
    transition: all .3s linear;
}
.index-banner-scroll span::after{
    content: '';
    width: 1px;
    height: 12px;
    background-color: #ae2f2f;
    display: block;
    position: absolute;
    bottom: 20%;
    left: 0;
    transform-origin: bottom;
    transform: rotateZ(-45deg);
    opacity: 0;
    transition: all .3s linear;
}



@media only screen and (max-width: 1000px){
    .index-banner-box, 
    .index-banner-list, 
    .index-video-box, 
    .index-video, 
    .index-video-bg {
        height: calc((1080 / 1920) * 100vw);
    }
    .index-banner-scroll span{
        height: 60px;
    }
}
@media only screen and (max-width: 768px){
    .index-banner-scroll{
        display: none;
    }
}


@media only screen and (min-width: 769px){
    .index-banner-scroll:hover p{
        color: #ae2f2f;
    }
    .index-banner-scroll:hover span{
        background-color: #ae2f2f;
    }
    .index-banner-scroll:hover span::before,
    .index-banner-scroll:hover span::after{
        bottom: 0;
        opacity: 1;
    }
}