#video-background {
    width: 100vw;
    position: fixed;
    top: 0;
    left: 0;
    z-index: -1;
}

#laug_div{
    font-size: 30px;
    margin-top: -660px;
    text-align: center;
    border-top: 1px solid #00e1ff;
}

.jumbotron{
    background: transparent;
    color: #ffffff;
}

#introduce{
    margin-top: 200px;
}