.parallax-section {
    background-attachment: fixed;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

@media (max-width: 768px) {
    .parallax-section {
        background-attachment: scroll;
        min-height: 200px;
    }
}