img {
    width: 100%;
    height: auto;
    object-fit: cover;
}

.sec01 {
    margin-top: -5px;
}

.sec04 {    
    margin-top: -20px;
}

@media screen and (max-width: 768px) {
    .sec01 {
        margin-top: 0;
    }

    .sec04 {
        margin-top: 0;
    }

    .sec06 {
        margin-top: 15px;
    }
}