.about-pattern {
    right: -50px;
    bottom: -50px;
    width: 300px;
    height: 300px;
    z-index: -1;
    opacity: 0.7;
}

.about-pattern img {
    max-width: 100%;
    height: auto;
}

@media (max-width: 768px) {
    .about-pattern {
        right: -30px;
        bottom: -30px;
        width: 200px;
        height: 200px;
    }
}