.video {
    position: relative;
}
.video_sp {
    height: 100%;
    overflow: hidden;
}
.video_sp video {
    width: 100%;
}
.nav {
    display: flex;
    justify-content: space-between;
    padding: 0 0.8rem;
    box-sizing: border-box;
    position: fixed;
    width: 100%;
    top: .8rem;
    z-index: 999;
}
.nav .nav_left {
    height: 1.5rem;
    padding: 0 .6rem;
    background: rgba(0,0,0,0.5);
    border-radius: .75rem;
}
.nav .nav_left span {
    line-height: 1.5rem;
    font-size: .7rem;
    color: #fff;
}
.nav .nav_right {
    height: 1.5rem;
    padding: 0 .6rem;
    background: rgba(0,0,0,0.5);
    border-radius: .75rem;
}
.nav .nav_right span {
    line-height: 1.5rem;
    font-size: .7rem;
    color: #fff;
}






.content {
    margin-top: 0.35rem;
    padding: 0rem .8rem;
}
.content h1 {
    font-weight: 700;
    margin-bottom: 1rem;
}
.content p {
    font-size: 0.7rem;
    color: #757575;
}