.main-bg {
    background-image: url(/img/main_bg.jpg);
}

.aboutus-img1 {
    background-image: url(/img/people1.webp);
    --bs-aspect-ratio: 50%;
}

.aboutus-img2 {
    background-image: url(/img/object1.jpg);
}

.aboutus-img3 {
    background-image: url(/img/people2.webp);
    --bs-aspect-ratio: 150%;
}