.content {
    width: 1200px;
    margin: 80px auto 0;
}
.title {
    font-size: 22px;
    line-height: 34px;
    font-weight: 500;
    margin-bottom: 10px;
}
.video-box {
    margin: 0 auto;
    background: #000000;
}
video {
    height: 500px;
    width: 100%;
}
.desc {
    font-size: 16px;
    line-height: 26px;
    white-space: pre-line;
    letter-spacing: 0;
    color: #18191C;
    margin-bottom: 20px;
}
/*移动端*/
@media screen and (max-width: 768px) {
    .content {
        width: 100%;
        padding: 0 10px 0 10px;
    }
    .title {

        font-size: 20px;
    }
    video {
        height: 350px;
    }
    .desc {
        font-size: 14px;
    }
}