.header_fon {
    position: absolute;
    top: -60%;
    left: -15%;
    width: 130%;
    z-index: 0; 
}
body {
    background: #212121;
}
.fullpage {
    z-index: 1;
}
.ttt {
    position: absolute;
}
.fab {
    padding-right: 15px;
}


    .title__lead-pb {
        padding-bottom: 40px;
    }
    
    @media (max-width: 750px) {
    .header_fon {
        position: absolute;
        top: -200px;
        left: -450px;
        width: 230%;
        z-index: 0; 
    }
}