@media (max-width : 768px) {
    /* header navigation */
    header{
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        z-index: 1000;
    }
    .header{
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 65px;
        padding:10px;
        z-index:999;
        -webkit-transition: all 0.3s;
        -moz-transition: all 0.3s;
        transition: all 0.3s;
    }
    .header > .row{
            margin-left: 0px;
    }
    .header.shrink{
        height: 65px !important;
        padding-top: 10px;
        padding-bottom: 10px;
    }
    .header .logo_img{
        width: 80px;
    }
    .header .btn_nav{
        height: 30px;
    }
    
    .header.shrink{
        background: #555;
    }
    .header.shrink .logo_img{
        width: 60px;
    }
    
    .header.shrink .btn_nav{
        height: 20px;
    }
    nav .content{
        gap : 20px;
        padding-top: 10vh;
        padding-left: 15vw;
        padding-right: 15vw;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: flex-start;
        flex-wrap: nowrap;
    }
    nav .menu ul li a{
        font-size: 42px;   
    }
    nav .direct_contact ul li {
        margin-bottom: 15px;
    }
    nav .direct_contact ul li a{
        font-size: 18px;
    }
    nav .sns{
        margin-top: 20px;
    }

    /* intro page */
    #main_banner{
        padding: 100px 0;
    }
    #main_banner p{
        font-size: 25px;
        line-height: 32px;
        padding: 20px 15%;
    }
    #about p{
        font-size:14px;
        font-weight: 500;
        line-height: 25px;
        
    }
    .dot_area{
        padding: 60px 0 0;
    }
    .dot{
        width: 6px;
        height: 6px;
    }
    .fsize_B{
        font-size: 30px;
        line-height: 35px;
    }
    .pb-5{
        padding-bottom: 1rem!important;
    }
    .service_tab ul{
        justify-content: flex-start;
    }
    .service_tab ul li {
        height: 60px;
        width: 33%;
        padding: 0 20px;
    }
    .service_content_area {
        padding: 30px 10px;
    }
    .service_content p{
        font-size: 16px;
        line-height: 25px;
    }
    .cta_area{
        
    }
    .cta_area button{
        width: 140px;
        height: 45px;
        margin-right: 8px;
        margin-bottom: 10px;
        padding-left: 15px;
    }
    .cta_area button:after{
        top: 9px;
    }
    .site_img{
        width: 90%;
        margin-top: 30px;
    }
    .experience_nav{
        width: 100%;
        height: 100%;
    }
    .swiper-button-prev{
        top: 0;
    }
    .swiper-button-next{
        top: 0;
    }
    #experience{
        padding-bottom: 0;
    }
    .news_tab {
        padding: 20px 0;
    }
    .news_tab ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 13px 5px;
    }
    .content_table ul li .container {
        align-items: center;
    }
    .news_content .news_cate{
        font-weight: 400;
        font-size: 14px;
        line-height: 20px;
        width: 35%;
    }
    .news_content .news_head{
        font-weight: 700;
        font-size: 18px;
        line-height: 30px;
        width: -webkit-fill-available;
    }
    #news{
        padding-bottom: 0;
    }
    #noti_main{
        display: none;
    }
    #noti_mobile{
        display: block;
        float: left;
        width: 100%;
        margin-bottom: 30px;
    }
    #fb_main{
        float: left;
        width: 100%;
        text-align: center;
    }



    /* footer */
    footer{
        padding: 30px 10px 30px;
        font-size: 0.8em;
        float: left;
        width: 100%;
    }
    .footer_logo img{
        width: 60px;
        margin-top: 5px;
        margin-bottom: 10px;
    }
    .footer_block p{
        font-size: 16px;
        line-height: 22px;
    }
    .footer_block ul li a{
        font-size: 12px;
    }
    .info{
        display: block;
        width:100%;
    }
    .info a{
        font-size: 12px;
        display: block;
        
    }
    .cta_contact button{
        padding: 8px 20px;
        font-size: 14px;
        margin-right: 10px;
    }

    .cta_contact, .cta_contact > a{
        color: #fff;
    }

    /* 인재영입 */
    #recruit, #culture, #cta_recruite, #more_info{
        padding: 60px 10px;
    }
    #recruit{
        padding-top: 40px;
    }

    .cta_recruit button{
        width: 140px;
        height: 45px;
        margin-right: 8px;
        margin-bottom: 10px;
        padding-left: 15px;
    }
    .cta_recruit button:after{
        top: 9px;
    }
    .recruit_content{
        margin-top: 10px;
    }
    .cta_recruit{
        margin-top: 20px;
        height: fit-content;
        text-align: left;
    }

    /* 트리플앤 */
    #introduce{
        padding-top:85px;
    }
    .intro_title{
        font-size: 26px;
        line-height: 1.5em;
    }
    .diagram_circle_area{
        width: 100%;
        display: inline-block;
        justify-content: center;
        align-items: center;
        margin-bottom: 30px;
        margin-top: 30px;
    }
    .diagram_circle_area{
    }
    .diagram_circle{
        display: block;
        width: 250px;
        height: 250px;
        border-radius: 50%;
        border: 1px solid #0075BE;
        position: relative;
        text-align: center;
        margin-top: 30px;
        padding-top: 10%;
        padding-bottom: 10%;
        margin-left: auto;
        margin-right: auto;
    }

    .diagram_circle h3{
        font-size: 15px;
        font-weight: 700;
        margin-top: 30px;
        margin-bottom: 5%;
        line-height: 1.5em;
    }
    .diagram_circle p{
        font-size: 12px;
        padding-left: 5%;
        padding-right: 5%;
    }

    /* 서비스(솔루션) */
    .solution_card{
        width: 100%;
        padding-top: 50px;
        padding-bottom: 40px;
    }
    .solution_site_img{
        height: 280px !important;
        overflow-y: hidden;
        margin-bottom: 20px;
    }
    #top_navi_area{
        width: 100%;
        max-width: 510px;
        margin-left: auto;
        margin-right: auto;
        margin-bottom: 10px;
    }

    .left_con{
        float: left;
        width: 100%;
        padding: 0px;
        margin: 0px;
        background: #efefef;
    }
    #left_menu_txt > div{
        width: auto;
        margin-left: auto;
        margin-right: auto;
    }
    #left_menu_title{
        width: 100%;
        float: left;
        text-align: center;
        font-size: 15px;
        font-weight: bold;
        color: #fff;
        background: #0075BE;
        padding: 10px;
    }
    #main_menu > div:last-child {
        display: flex;
        justify-content: space-between;
        align-items: stretch;
        width: 100%;
        flex-wrap: wrap;
    }
    
    /* 메뉴 항목들을 flex item으로 변경 */
    .menu_1depts {
        float: none; /* float 해제 */
        width: auto; /* width 자동 조정 */
        flex: 1; /* 균등 분배 */
        text-align: center;
        border-bottom: 1px solid #dddddd;
        border-right: 1px solid #dddddd; /* 세로 구분선 추가 */
        font-size: 14px;
        padding: 10px 5px;
        margin: 0;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    /* 마지막 메뉴 항목의 오른쪽 테두리 제거 */
    .menu_1depts:last-child {
        border-right: none;
    }
    
    /* 메뉴 링크 스타일 */
    .menu_1depts a {
        display: block;
        width: 100%;
        text-decoration: none;
        color: inherit;
        text-align: center;
    }
    #sub_contents_right{
        float: left;
        padding-left: 0px;
        padding-right: 0px;
        padding-top: 10px;
        width: 100%;
        word-wrap: break-word;
        margin-bottom: 30px;
    }
    #board_search{
        margin-top: 20px!important;
    }
    .list_footer{
        text-align: center;
    }
    .list_footer > .pagination{
        width: 100%;
        text-align: center!important;
        display: inline-block;
    }

}

@media (min-width: 992px and max-width : 1200px){
    .service_tab{
        max-width: 1140px;
    }
    .solution_card{
        width: 100%;
     
    }
    #sub_con_area{
        margin-top: 10px;
        clear: both;
        width: 90%;
        margin-left: auto;
        margin-right: auto;
        background: #fff;
        padding-top: 10px;
        padding-bottom: 10px;
    }
    .fsize_B{
        font-size: 45px;
        line-height: 50px;
    }
    #noti_main{
        display: none;
    }
    #noti_mobile{
        float: left;
        width: 100%;
        margin-bottom: 30px;
        display: block;
    }
    #fb_main{
        float: left;
        width: 100%;
        text-align: center;
    }
}
.thumb img{
    width: 170px !important;
}
@media (min-width: 769px and max-width : 992px){
    .service_tab{
        max-width: 960px;
    }
    .fsize_B{
        font-size: 40px;
        line-height: 45px;
    }
    #noti_main{
        display: none;
    }
    #noti_mobile{
        float: left;
        width: 100%;
        margin-bottom: 30px;
        display: block;
    }
    #fb_main{
        float: left;
        width: 100%;
        text-align: center;
    }
}