.f1 {
    position: absolute;
    top: 0vw;
    right: 3vw;
    width: 87vw;
    height: auto;
    z-index: -1;
}
.fb {
    position: absolute;
    top: 21vw;
    right: 20vw;
    width: 19vw;
    height: auto;
}
.f2 {
    position: absolute;
    top: 6vw;
    right: 7vw;
    width: 81vw;
    height: auto;
    z-index: 1;
}
@media (max-width: 480px) {
    .f1 {
        position: absolute;
        top: 4vw;
        right: 0;
        width: 276vw;
        height: auto;
        z-index: -1;
    }
    .f2 {
        position: absolute;
        top: 22vw;
        right: 15vw;
        width: 249vw;
        height: auto;
        z-index: 1;
    }
    .fb {
        position: absolute;
        top: 69vw;
        right: 55vw;
        width: 61vw;
        height: auto;
    }
}