.offer-img {
    width: 100%;
    height: 300px;          /* 👈 fixed height */
    overflow: hidden;
    border-radius: 14px;    /* optional */
    margin-bottom: 30px;
}

.offer-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;     /* 👈 keeps aspect ratio */
    display: block;
}