#problem .scheme {
    margin-top: 60px;
    display: flex;
    justify-content: space-between;
}

#problem .scheme .col {
    padding: 70px 0px;
    box-sizing: border-box;
    display: flex;
    justify-content: space-between;
    flex-direction: column;
}

#problem .scheme .switch {
    display: none;
}

#problem .scheme .col li {
    flex-shrink: 1;
}

#problem .scheme .col li h4 {
    color: #3b3b3b;
    font-size: 30px;
    margin-bottom: 26px;
}

#problem .scheme .col li p {
    color: #3b3b3b;
    font-size: 18px;
}

@media screen and (max-width: 1200px) {
    #problem .scheme {
        margin-top: .5rem;
    }
    
    #problem .scheme .col {
        display: flex;
        justify-content: space-between;
        flex-direction: column;
    }

    #problem .scheme img,
    #problem .scheme .col {
        display: none;
    }

    #problem .scheme .switch {
        display: block;
        width: 100%;
    }
    
    #problem .scheme .col li h4 {
        color: #3b3b3b;
        font-size: .6rem;
        font-weight: 700;
        margin-bottom: .6rem;
    }
    
    #problem .scheme .col li p {
        color: #3b3b3b;
        font-size: .4rem;
    }
}