body{
    background-color: #000;
}
.bannerimg{
    width: 100%;
}
.bannerimg img{
    width: 100%;
}

.video {
    width: 100%;
    position: relative;
}

.video video {
    width: 100%;
}

.video .bofang {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}
.videobox {
    width: 100%;
}