/* md 상태 */

@media (min-width:768px){
    header{ padding: 180px 0 140px;}
    .main_text h2 { font-size: 40px;}
}

/* lg 상태 */

@media (min-width:992px){
    header{ padding: 210px 0 170px;}
    .main_text{
        margin-left: 0;
        width: 960px;
        margin: 0 auto 0 auto;
    }
}

/* xl 상태 */

@media (min-width:1200px){
    .main_text{
        width: 1140px;
        margin: 0 auto 0 auto;
    }
    .main_text h2 { font-size: 50px;}
}