/*.header-empty { position:relative; width:100%; border:solid 1px red; height:88px; display:none; } 
.header.is-sticky .header-empty { position:relative; display:none; } */
@media all and (-ms-high-contrast: none), (-ms-high-contrast: active){
 .board_bottom { margin-top:250px; } 
 .gallery_inner { margin-top:100px; } 
 }
 .accordion .card-header h4 { font-family: "Work Sans", 'NanumSquareR'; } 
 .faq-content-accordion .card-body { font-size:15px; } 
 /* add 2022-03-31 */
 .video_wrap { width: 100%; height: 800px; } 
 .video_wrap iframe { width: 100%; height: 100%; } 
 ul.mlang { display: none; } 
 @media screen and (max-width:640px){
 .video_wrap { width: 100%; height: 265px; } 
 ul.mlang { display: inline-block; font-size: 0; overflow: hidden; vertical-align: middle; } 
 ul.mlang li { display: inline-block; } 
 ul.mlang li:first-child { border-right: 1px solid #ccc; } 
 ul.mlang li a { display: block; font-size: 12px; padding: 0 15px; } 
 }