*,
*::after,
*::before{
    margin: 0; 
    padding: 0;
    box-sizing: inherit;
}

.intro {
    position: fixed;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100vh;
    background: #000000;
    transition: 1.8s;/*2s*/
}

.intro video {
    position: absolute;
}
video {
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    object-fit: cover;
}

.content{
    width: 100%;
}