.airplane {
    max-height: 380px;
    position: absolute;
    z-index: 3100;
    right: 70px;
    bottom: -80px;
}

@media(max-width: 1100px) {
    .airplane {
        max-height: 350px;
        position: relative;
        right: auto;
        left: 50%;
        transform: translateX(-50%);
        bottom: auto;
        margin-top: 25px;
    }
}