.index-banner-box{
    width: 100%;
    display: block;
    position: relative;
    overflow: hidden;
    margin-top: 70px;
}
.index-banner-box,
.index-banner-list,
.index-video-box,
.index-video,
.index-video-bg{
    height: calc((540/1920)*100vw);
}
.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%;
    font-size: 28px;
    font-family: "Roboto" ,"Noto Sans TC";
    font-weight: 700;
    letter-spacing: 0.2em;
    color: #FFF;
    display: block;
    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: 4;
}
.index-video-box{
    width: 100%;
    display: block;
    position: relative;
}
.index-video{
    width: 100%;
    height: 100%;
    position: relative;
    z-index: 4;
    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: 74.5%;
    display: block;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    right: 0;
    z-index: 5;
    text-align: left;
}
.index-video-open{
    display: none;
}
.not-banner{
    display: none;
}
.index-banner-slong-btn{
    display: inline-block;
    margin-top: 10px;
    outline: none;
}
.index-banner-slong-btn span{
    width: 150px;
    font-size: 18px;
    font-family: "Oswald";
    font-weight: 700;
    letter-spacing: 1px;
    background-color: rgba(255,255,255,0.6);
    text-align: center;
    line-height: 60px;
    display: inline-block;
}

@media only screen and (max-width: 1000px){
    .index-banner-box{
        margin-top: 64px;
    }
    .index-banner-box, 
    .index-banner-list, 
    .index-video-box, 
    .index-video, 
    .index-video-bg{
        height: 450px;
    }
    .index-banner-slong, .index-video-slong{
        font-size: 24px;
        letter-spacing: 0.1em;
    }
    .index-banner-slong-btn span{
        width: 100px;
        font-size: 16px;
        line-height: 50px;
    }
}
@media only screen and (max-width: 550px){
    .index-banner-box{
        margin-top: 50px;
    }
    .index-banner-box, 
    .index-banner-list, 
    .index-video-box, 
    .index-video, 
    .index-video-bg{
        height: 250px;
    }
    .index-banner-slong, .index-video-slong{
        font-size: 20px;
        letter-spacing: 0.06em;
    }
    .index-banner-slong-btn span{
        width: 80px;
        font-size: 14px;
        line-height: 40px;
    }
    .index-banner-slong-box{
        width: 80%;
    }
}
@media only screen and (max-width: 550px){
    .index-banner-slong, .index-video-slong{
        font-size: 18px;
    }
    .index-banner-slong-box{
        width: 90%;
    }
}