.contents-main>div{
        width: 97%;
        margin: auto;
        padding-top: 2em;
        height: 750px;
}
.contents-main>div>hr{
        height: 1px;
        opacity: 1;
        color: #bebebe;
        margin: 1.5em 0;
}
.text-heading{
        text-align: center;
        font-weight: bold;
        font-size: 1.6em;
}

@media screen and (max-width: 640px){
        .contents-main>div{
                width: 90%;
                height: auto;
                padding-bottom: 5em;
        }
        .text-heading{ font-size: 1.2em;}
}