/*登录页面视频背景图*/
.login-video-bg {
    width: 100%;
    height: 100%;
    position: absolute;
}
.login-video-bg video {
    position: absolute;
    height: 100%;
    width: 100%;
    top: 0;
    left: 0;
    object-fit: cover
}
.login-video-bg .mask {
    position: fixed;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    background-color: #000000;
    opacity: .7;
}