@media screen and (max-width:640px) {
    .sub_side {
        display: none;
    }
    .sub_wrap {
        max-width: 94%;
    }
    .sub_wrap .sub_r {
        width: 100%;
    }
    .sub_r .sub_title {
        height: auto;
        overflow: hidden;
        padding-top: 69px;
    }
    .sub_title h2 {
        padding-left: 15px;
        line-height: 45px;
        font-size: 20px;
    }
    .sub_title h2::before {
        top: 21px;
    }
    .sub_title h4 {
        top: 45px;
        padding-left: 15px;
        font-size: 14px;
    }
    .sub_con {
        padding-bottom: 50px;
    }
    /*--- introduction01----*/
    .introduction01 img {
        margin-bottom: 50px;
    }
    /*---introduction02-------*/
    .introduction02 td {
        display: block;
        padding: 0;
    }
    .introduction02 td:first-child {
        width: 100%;
        border-bottom: none;
        padding-top: 5px;
    }
    .introduction02 td:last-child {
        width: 100%;
        text-align: center;
        padding: 5px 3%;
        box-sizing: border-box;
    }
    /*----- board--------*/
    #board_search {
        width: 100%;
        padding-top: 10px;
    }
    #board_search select {
        width: 35%;
    }
    #board_search input[type=text] {
        width: 63%;
        margin: 0;
        margin-left: 2%;
    }
    #board_search input[type=submit] {
        width: 100%;
        margin: 10px 0;
    }
    .board_btn_con {
        margin-top: 15px;
    }
    .board_btn {
        background: #4384d4;
        border: none;
    }
    .board_btn a {
        color: white;
    }
    .board th {
        display: none;
    }
    .board tr {
        border-bottom: 1px solid #ccc;
        overflow: hidden;
        display: block;
        text-align: left;
    }
    .board tr:first-child {
        border-bottom: 0;
    }
    .board td {
        width: auto;
        display: inline-block;
        line-height: 20px;
        padding: 0;
        font-size: 12px;
        border-bottom: 0;
        margin-right: 2%
    }
    .board td.board_num {
        display: none;
    }
    .board td.board_title {
        width: 100%;
        font-size: 17px;
        line-height: 30px;
        float: none;
        display: block;
        margin-right: 0;
    }
    .board td.board_title a {
        display: block;
    }
    .board td.board_date,
    .board td.board_writer,
    .board td.board_views {
        width: auto
    }
    .board tr:hover td {
        background: white;
    }
    .sub_con .pagination {
        margin-top: 20px;
    }
    /* ----- board_detail ---------*/
    .sub_title .board_btn {
        height: 30px;
        width: 100px;
        line-height: 28px;
        margin-top: 10px;
    }
    .board_prev,
    .board_next {
        background: white;
        border: 1px solid #ccc;
    }
    .board_prev a,
    .board_next a {
        color: #777;
    }
    .board_prev:hover,
    .board_next:hover {
        background: white;
        border: 1px solid #ccc;
    }
    .board_prev:hover a,
    .board_next:hover a {
        color: #777;
    }
    .board_text,
    .board_answer {
        padding: 10px;
    }
    /*-------- board_write------------*/
    .board_write {
        padding: 10px
    }
    .board_write tr {
        overflow: hidden;
        display: block;
    }
    /*	
	.board_write tr:nth-child(3) input {
					width:70%;
	}
*/
    .board_write tr button {
        width: 30%;
    }
    .board_write tr th {
        width: 100%;
        display: block;
    }
    .board_write tr td {
        width: 100%;
        display: block;
        height: auto;
    }
    .board_write textarea {
        height: 250px;
    }
    .board_write_cancel {
        background: none;
        color: #777;
        border: 1px solid #ccc;
    }
    .board_write_cancel a {
        color: #777;
    }
    .board_write_cancel:hover {
        background: none;
        color: #777;
        border: 1px solid #ccc;
    }
    .board_write_cancel:hover a {
        color: #777;
    }
    /*---- 회원국 정보 csss ------*/
    .member02 .member02_country {
        width: 100%;
        padding: 0 5px;
    }
    .member02 h3 img {
        display: block;
        margin: 5px auto;
    }
    .member02 h3 {
        line-height: inherit;
    }
    .member02_write table {
        padding: 10px;
    }
    .member02_write th {
        width: 30%;
    }
    .member02_write td {
        width: 70%;
        padding: 0;
        padding: 10px 0;
        padding-left: 10px;
    }
    .member02_write input {
        width: 100%;
    }
    /*---- 토론방 csss ---------------*/
    .knowledge01 li {
        padding: 10px;
        min-height: 180px;
        margin-bottom: 20px;
    }
    .knowledge01 li h4 {
        line-height: 40px;
        padding-top: 100px;
        padding-right: 0;
    }
    .knowledge01 li p {
        padding-right: 0px;
    }
    .knowledge01 .knowledge01_answer {
        background-size: 100%;
        background-image: url('../images/sub/knowledge_bg.png');
        width: 100px;
        height: 100px;
        top: 10px;
        right: 50%;
        margin-right: -50px;
        padding: 10px;
    }
    .knowledge01_answer > div {
        border: none;
        background-color: #4384d4;
    }
    .knowledge01 .knowledge01_answer p {
        font-size: 16px;
        color: white
    }
    .knowledge01_answer span {
        font-size: 16px;
        color: white;
        line-height: 20px;
        padding-top: 13px;
        display: block
    }
    .knowledge01_question {
        margin-top: 20px;
    }
    .knowledge01_question textarea {
        height: 130px;
        padding: 10px;
    }
    .knowledge01_detail {
        padding: 10px;
    }
    /*--- 강좌csss --------------*/
    .knowledge02 > ul > li {
        width: 100%;
    }
    .knowledge02 .knowledge_img {
        height: 130px;
    }
    .knowledge02 .knowledge_img img {
        width: 100%;
    }
    .knowledge02 > ul > li:hover .knowledge_img::after {
        display: none;
    }
    /*--- 지식자료식csss --------------*/
    .knowledge03 > ul > li {
        padding: 10px;
        min-height: 180px;
        margin-bottom: 20px;
    }
    .knowledge03 li h4 {
        line-height: 40px;
        padding-top: 140px;
        padding-right: 0;
    }
    .knowledge03 li p {
        padding-right: 0px;
    }
    .knowledge03 .knowledge03_down {
        background-size: 100%;
        background-image: url('../images/sub/knowledge_bg.png');
        top: 10px;
        right: 50%;
        margin-right: -65px;
    }
    .knowledge03_down > a > div {
        border: none;
        background-color: #4384d4;
    }
    .knowledge03 .knowledge03_down p {
        font-size: 16px;
        color: white;
        line-height: 45px;
    }
    .knowledge03_down .down_img {
        background-position: 0 -32px;
    }
    .knowledge03 li > a:hover h4 {
        color: #444;
    }
    .knowledge03 li > a:hover p {
        color: #777;
    }
    /*--- 워킹그룹활동 csss --------------*/
    .knowledge04 > label{width:50%;overflow: hidden;}
    .knowledge04 > ul{margin-top: 50px;}
    .knowledge04 > ul > li {
        padding: 10px;
        min-height: 180px;
        margin-bottom: 20px;
    }
    .knowledge04 li > a:hover h4 {
        color: #444;
    }
    .knowledge04 li > a:hover p {
        color: #777;
    }
    /*--- 유라시아sdi자료실 csss --------------*/
    .knowledge05 > label {
        width: 50%;
        height: 40px;
        line-height: 38px;
    }
    .knowledge05_con li {
        padding: 10px;
        min-height: 180px;
        margin-bottom: 20px;
    }
    .knowledge05_con li h4 {
        line-height: 40px;
        padding-top: 140px;
        padding-right: 0;
    }
    .knowledge05_con li p {
        padding-right: 0px;
    }
    .knowledge05_con .knowledge05_down {
        background-size: 100%;
        background-image: url('../images/sub/knowledge_bg.png');
        top: 10px;
        right: 50%;
        margin-right: -65px;
    }
    .knowledge05_down > a > div {
        border: none;
        background-color: #4384d4;
    }
    .knowledge05_con .knowledge05_down p {
        font-size: 16px;
        color: white;
        line-height: 45px;
    }
    .knowledge05_down .down_img {
        background-position: 0 -32px;
    }
    .knowledge05 li > a:hover h4 {
        color: #444;
    }
    .knowledge05 li > a:hover p {
        color: #777;
    }
    /*---- join------------*/
    .join {
        max-width: 94%;
        margin: 30px auto;
        padding-top: 64px;
    }
    .join_agree > div > div:last-child {
        padding: 10px;
    }
    .join_title h4 {
        margin-left: 5px;
    }
    .join_ck {
        margin-right: 5px;
    }
    .join > div {
        margin-bottom: 20px;
    }
    .join_btn ul {
        width: 100%;
        display: block;
    }
    .join_btn li {
        float: left;
        margin: 0;
        width: 48%;
    }
    .join_btn li.join_success {
        float: right;
    }
    .join_form {
        padding: 20px 10px;
    }
    .join_form > div {
        height: auto;
        border-bottom: 1px solid #ccc;
        padding-top: 0;
    }
    .join_form > div:last-child {
        border-bottom: 0;
    }
    .join_form label {
        width: 100%;
    }
    .join_form input {
        width: 100%;
        height: 35px;
    }
    .join_form #gen {
        width: 100%;
        margin-left: 0;
        margin-top: 10px;
    }
    #gen label {
        width: 48%;
    }
    #gen label:last-child {
        float: right;
        margin-left: 0;
    }
    #address > div {
        width: 100%;
    }
    #address input:first-child {
        width: 48%;
        margin-right: 4%;
    }
    #address button {
        width: 48%;
    }

    /*---------- 의사결정 위원회css --------------*/
    .member02_write .member02_list {
        padding: 10px;
        margin-bottom: 10px;
    }
    .member02_list .member02_img {
        float: none;
        margin-right: 0px;
        margin: 0 auto;
    }
    .member02_list ul {
        float: none;
        margin-top: 10px;
    }
    .member02_list li {
        overflow: hidden;
        line-height: 30px;
        list-style: none;
        margin-top: 5px;
    }
    .member02_list span {
        width: 100%;
        float: left;
        font-weight: 600;
    }
    .member02_list p {
        width: 100%;
        text-indent: 10px;
    }

    /*---------- 갤러리 css----------*/
    .gallery tr:first-child {
        border-bottom: 1px solid #ccc;
    }
    .gallery td.board_num {
        display: block;
        margin:10px auto;
        width:100%;
        text-align: center;
    }
    .gallery td.board_title{margin-bottom: 10px;}
    .gallery .board_title h3 span{display: none;}
    .gallery .board_title p{margin-top: 0;}
    
    
    .member02_country .img_none {
    display: block;
        margin:5px auto;
}

.member02_country .img_none img {
    width: 100%;
    height: 48px;
    margin-right: 0;
    border: none;
}
}