/* common css start */
* { box-sizing: border-box; }
input, button { border: 0; }

.sec .inner {  margin: 0 auto; } 
.sec .inner.w_1200 { max-width: 1200px; }
.sec .inner.w_900 { max-width: 900px; }

/* .sec_common_title */
.sec_common_title { padding: 124px 0 100px; text-align: center; } 
.sec_common_title h2 { font-size: 56px; font-weight: 500; letter-spacing: -1.12px; } 

/* .pagination_box */
.pagination_box,
.pagination_box .arrow_area,
.pagination_box .num_area { display: flex; align-items: center; justify-content: center; } 
.pagination_box { gap: 20px; } 
.pagination_box .arrow_area { gap: 12px; } 
.pagination_box .arrow_area a { text-indent: -9999px; width: 24px; height: 24px; background-repeat: no-repeat; background-size: cover; background-position: center; } 
.pagination_box .arrow_area a.first { background-image: url("/resources/cn/images/common/icon/ic_arrow_first.svg"); } 
.pagination_box .arrow_area a.last { background-image: url("/resources/cn/images/common/icon/ic_arrow_last.svg"); } 
.pagination_box .arrow_area a.prev { background-image: url("/resources/cn/images/common/icon/ic_arrow_prev.svg"); } 
.pagination_box .arrow_area a.next { background-image: url("/resources/cn/images/common/icon/ic_arrow_next.svg"); } 
.pagination_box .num_area { gap: 16px; } 
.pagination_box .num_area .num { font-size: 16px; letter-spacing: -0.32px; line-height: 1.3; } 
.pagination_box .num_area span.num { color: #2C7CD8; } 
.pagination_box .num_area a.num { color: #666; } 

/* .utility_box */
.utility_box { display: flex; align-items: center; justify-content: space-between; margin-bottom: 30px; } 
.utility_box .select_area { display: flex; align-items: center; gap: 32px; } 
.utility_box .select_language .drop_box { position: relative; width: 100px; height: 40px; border-radius: 99px; background-color: #f3f3f3; } 
.utility_box .select_language .drop_box::before { content: ''; position: absolute; top: 0; left: 0; z-index: -1; width: 100%; height: 100%; } 
.utility_box .select_language .drop_box ul { display: none; position: absolute; top: 100%; left: 0; width: 100%; padding: 0 20px; border-radius: 0 0 20px 20px; background-color: #f3f3f3; } 
.utility_box .select_language .drop_box ul li a { display: block; padding-bottom: 10px; }
.utility_box .select_language .drop_box ul li:last-child a { display: block; padding-bottom: 12px; }
.utility_box .select_language .drop_box button { display: flex; align-items: center; justify-content: center; gap: 12px; padding: 12px 20px; } 
.utility_box .select_language .drop_box span,
.utility_box .select_language .drop_box a { font-size: 16px; font-weight: 500; letter-spacing: -0.48px; color: #333; } 
.utility_box .select_language .drop_box i { width: 16px; height: 16px; background-image: url("/resources/cn/images/common/icon/ic_drop_list_arrow.svg"); background-size: cover; background-position: center; background-repeat: no-repeat; transition: .3s; } 
.utility_box .select_language .drop_box.active { border-radius: 20px 20px 0 0; } 
.utility_box .select_language .drop_box.active button i { transform: rotate(180deg); } 
.utility_box .select_category .category_tab { display: flex; gap: 30px; max-width: 770px; overflow-x: auto; }
.utility_box .select_category .category_tab::-webkit-scrollbar { height: 2px; background: #eee; }
.utility_box .select_category .category_tab::-webkit-scrollbar-thumb { background: #a2a2a2; }
.utility_box .select_category .category_tab li { white-space: nowrap; }
.utility_box .select_category .category_tab li:last-child { padding-right: 30px; }
.utility_box .select_category .category_tab li a { display: block; padding-bottom: 6px; font-size: 18px; letter-spacing: -0.54px; color: #666; } 
.utility_box .select_category .category_tab li.on a { font-weight: 600; color: #2C7CD8; } 
.utility_box .input_wrap { position: relative; width: 240px; height: 40px; }
.utility_box .input_wrap input[type=text] { width: 100%; height: 100%; padding: 10px 20px; background-color: #f3f3f3; border-radius: 100px; font-size: 16px; letter-spacing: -0.48px; color: #666; }
.utility_box .input_wrap input[type=text]::placeholder { font-size: 16px; letter-spacing: -0.48px; color: #ccc; }
.utility_box .input_wrap input[type=text]:focus { outline: 1px solid #828282; }
.utility_box .input_wrap button { position: absolute; top: 50%; right: 16px; transform: translateY(-50%); width: 20px; height: 20px; background-image: url("/resources/cn/images/common/icon/ic_search.svg"); background-repeat: no-repeat; background-size: cover; background-position: center; }

/* .no_result_box */
.no_result_box { display: flex; align-items: center; justify-content: center; height: 450px; background-color: #f7f7f7; border-top: 1px solid #ccc; } 
.no_result_box span { font-size: 24px; font-weight: 500; letter-spacing: -0.72px; line-height: 1.5; color: #333; } 

/* .sec_common_view_title */
.sec_common_view_title { padding: 120px 0 40px; border-bottom: 1px solid #ccc; }
.sec_common_view_title h2 { margin-bottom: 30px; word-break: keep-all; font-size: 40px; font-weight: 500; letter-spacing: -0.8px; line-height: 1.4; color: #000; }
.sec_common_view_title .bottom_area { display: flex; align-items: center; justify-content: space-between; position: relative; height: 40px; }
.sec_common_view_title .bottom_area .txt_wrap ul { display: flex; align-items: center; gap: 36px; }
.sec_common_view_title .bottom_area .txt_wrap li { position: relative; font-size: 16px; letter-spacing: -0.32px; line-height: 1.3; color: #666; }
.sec_common_view_title .bottom_area .txt_wrap li.category { color: #2C7CD8; }
.sec_common_view_title .bottom_area .txt_wrap li::before { content: ''; position: absolute; top: 50%; transform: translateY(-50%); right: -18px; width: 1px; height: 16px; background-color: #ccc; }
.sec_common_view_title .bottom_area .txt_wrap li:last-child::before { display: none; }
.sec_common_view_title .bottom_area .sns_list_wrap { position: absolute; top: 0; right: 0; z-index: 2; margin: 0; font-size: 0; } 
.sec_common_view_title .bottom_area .sns_list_wrap:after { content: ''; display: table; clear: both; } 
.sec_common_view_title .bottom_area .sns_list_wrap .sns_share { position: relative; display: inline-block; } 
.sec_common_view_title .bottom_area .sns_list_wrap .btn_share { position: relative;  width: 40px; height: 40px; background: url("/resources/cn/images/common/icon/ic_share.png") 0 0 no-repeat; border: none; font-size: 0; text-indent: -9999%; overflow: hidden; cursor: pointer; z-index: 1; } 
.sec_common_view_title .bottom_area .sns_list_wrap .btn_share.open { background-position: 0 -40px; } 
.sec_common_view_title .bottom_area .sns_list_wrap .sns_list { display: none; position: relative; height: 40px; border: none; box-sizing: border-box; background: #f3f3f3; border-radius: 25px; margin-right: 10px; } 
.sec_common_view_title .bottom_area .sns_list_wrap .sns_list li { position: absolute; left: 200px; height: 100%; } 
.sec_common_view_title .bottom_area .sns_list_wrap .sns_list li:before { content: ''; display: block; position: absolute; top: 50%; left: 0; width: 1px; height: 15px; margin-top: -7px; background-color: #dedede; } 
.sec_common_view_title .bottom_area .sns_list_wrap .sns_list li:first-child:before { display: none; } 
.sec_common_view_title .bottom_area .sns_list_wrap .sns_list li .btn_sns { display: block; width: 40px; height: 40px; margin: 0; background-color: transparent; background-position: center; background-repeat: no-repeat; border: 0; font-size: 0; text-indent: -9999%; cursor: pointer; transition: background-image .3s; } 
.sec_common_view_title .bottom_area .sns_list_wrap .sns_list li .btn_sns.facebook { background-image: url("/resources/cn/images/common/icon/ic_facebook.svg"); } 
.sec_common_view_title .bottom_area .sns_list_wrap .sns_list li .btn_sns.kakao { background-image: url("/resources/cn/images/common/icon/ic_kakao.svg"); } 
/*.sec_common_view_title .bottom_area .sns_list_wrap .sns_list li .btn_sns.insta { background-image: url("/resources/cn/images/common/icon/icon_insta.png"); }  */
/*.sec_common_view_title .bottom_area .sns_list_wrap .sns_list li .btn_sns.linkedin { background-image: url("/resources/cn/images/common/icon/icon_linkedin.png"); }  */
.sec_common_view_title .bottom_area .sns_list_wrap .sns_list li .btn_sns.copy { background-image: url("/resources/cn/images/common/icon/ic_copy.svg"); } 

/* .sec_common_view */
.sec_common_view { padding: 60px 0 120px; }
.sec_common_view .view_content_box { margin-bottom: 60px; }
.sec_common_view .view_content_box .view_content_box_inner * { word-break: break-all; font-size: 18px; letter-spacing: -0.6px; line-height: 1.5; color: #333; }
.sec_common_view .view_content_box .view_content_box_inner table { table-layout: auto; }
.sec_common_view .view_content_box .view_content_box_inner img { max-width: 100%; margin: 0 auto 10px; }
.sec_common_view .view_content_box .view_content_box_inner .iframe_area { overflow: hidden; width: 100%; height: 500px; border-radius: 20px; }
.sec_common_view .btn_box { display: flex; align-items: center; justify-content: center; }
.sec_common_view .btn_box .btn { display: flex; align-items: center; justify-content: space-between; min-width: 120px; padding: 12px 20px; background-color: #2C7CD8; border-radius: 99px; }
.sec_common_view .btn_box .btn span { font-size: 16px; font-weight: 500; letter-spacing: -0.48px; line-height: 1; color: #fff; }
.sec_common_view .btn_box .btn i { width: 16px; height: 16px; background-repeat: no-repeat; background-size: cover; background-position: center; }
.sec_common_view .btn_box .btn.list i { background-image: url("/resources/cn/images/common/icon/ic_list.svg"); }

/* .sec_common_latest_articles */
.sec_common_latest_articles { padding: 80px 0  120px; background-color: #f3f3f3; }
.sec_common_latest_articles .sec_title { margin-bottom: 40px; font-size: 32px; font-weight: 500; letter-spacing: -0.64px; line-height: 1.4; color: #000; }
.sec_common_latest_articles ul { display: flex; gap: 40px; }
.sec_common_latest_articles li { width: calc((100% - 80px) / 3); }
.sec_common_latest_articles li a { display: flex; flex-direction: column; gap: 20px; width: 100%; }
.sec_common_latest_articles li .img_area { overflow: hidden; position: relative; border-radius: 10px; width: 100%; height: 190px; }
.sec_common_latest_articles li .img_area img { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 100%; height: 100%; object-fit: cover; transition: transform .3s; }
.sec_common_latest_articles li .txt_area .title { overflow: hidden; display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 2; min-height: 60px; max-height: 60px; margin-bottom: 16px; font-size: 20px; font-weight: 500; letter-spacing: -0.6px; line-height: 1.5; color: #333; }
.sec_common_latest_articles li .txt_area .date { font-size: 16px; letter-spacing: -0.32px; line-height: 1.3; color: #666; }
.sec_common_latest_articles li:hover .txt_area .title { text-decoration: underline; }
.sec_common_latest_articles li:hover .img_area img { transform: translate(-50%, -50%) scale(1.05); }

/* .sec_common_list */
.sec_common_list { padding: 0 0 160px; } 
.sec_common_list .list_box { margin-bottom: 60px; } 
.sec_common_list .list_box ul { border-top: 1px solid #D9D9D9; } 
.sec_common_list .list_box ul li a { display: flex; align-items: center; justify-content: space-between; gap: 40px; padding: 36px 0; border-bottom: 1px solid #D9D9D9; } 
.sec_common_list .list_box .txt_area { display: flex; flex-direction: column; gap: 16px; } 
.sec_common_list .list_box .txt_area h3 { display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 2; max-height: 3em; overflow: hidden; max-width: 920px; text-overflow: ellipsis; font-size: 24px; font-weight: 500; letter-spacing: -0.72px; line-height: 1.5; color: #333; } 
.sec_common_list .list_box .txt_area span { font-size: 16px; letter-spacing: -0.32px; line-height: 1.3; color: #666; } 
.sec_common_list .list_box .img_area { overflow: hidden; position: relative; width: 240px; height: 120px; border-radius: 10px; border: 1px solid #D9D9D9; } 
.sec_common_list .list_box .img_area img { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 100%; height: 100%; object-fit: cover; transition: transform .3s; } 
.sec_common_list .list_box ul li:hover h3 { text-decoration: underline; } 
.sec_common_list .list_box ul li:hover .img_area img { transform: translate(-50%, -50%) scale(1.05); } 
/* //common css end */

/* video-library .sec_main_video  */
.video-library .sec_main_video .main_video_box { margin-bottom: 80px; }
.video-library .sec_main_video .main_video_box a { overflow: hidden; display: flex; width: 100%; height: 340px;  border-radius: 20px; }
.video-library .sec_main_video .main_video_box a > div { width: 50%; }
.video-library .sec_main_video .main_video_box .img_area { overflow: hidden; position: relative; }
.video-library .sec_main_video .main_video_box .img_area img { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 100%; height: 100%; object-fit: cover; transition: transform .3s; }
.video-library .sec_main_video .main_video_box .txt_area { display: flex; flex-direction: column; justify-content: center; gap: 16px; padding: 10px 60px; background-color: #f3f3f3;}
.video-library .sec_main_video .main_video_box .txt_area h3 { font-size: 24px; font-weight: 500; letter-spacing: -0.72px; line-height: 1.5; color: #333; }
.video-library .sec_main_video .main_video_box .txt_area span { font-size: 16px; letter-spacing: -0.32px; color: #666; }
.video-library .sec_main_video .main_video_box:hover .img_area img { transform: translate(-50%, -50%) scale(1.05); }
.video-library .sec_main_video .main_video_box:hover .txt_area h3 { text-decoration: underline; }
.video-library .sec_video_list { padding: 0 0 160px; }
.video-library .sec_video_list .list_box { margin-bottom: 60px; padding: 60px 0; border-top: 1px solid #ccc; border-bottom: 1px solid #ccc; }
.video-library .sec_video_list .list_box ul { display: flex; flex-wrap: wrap; gap: 60px 40px; }
.video-library .sec_video_list .list_box li { width: calc((100% - 80px) / 3); }
.video-library .sec_video_list .list_box li a { display: flex; flex-direction: column; gap: 20px; }
.video-library .sec_video_list .list_box .img_area { overflow: hidden; position: relative; height: 207px; border-radius: 10px; }
.video-library .sec_video_list .list_box .img_area img { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 100%; height: 100%; object-fit: cover; transition: transform .3s; }
.video-library .sec_video_list .list_box .txt_area h3 { overflow: hidden; display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 2; min-height: 60px; max-height: 60px; margin-bottom: 16px; font-size: 20px; font-weight: 500; letter-spacing: -0.6px; line-height: 1.5; color: #333; }
.video-library .sec_video_list .list_box .txt_area span { font-size: 16px; letter-spacing: -0.32px; line-height: 1.3; color: #666; }
.video-library .sec_video_list .list_box li:hover .img_area img { transform: translate(-50%, -50%) scale(1.05); }
.video-library .sec_video_list .list_box li:hover .txt_area h3 { text-decoration: underline; }

/*  product-catalog */
.product-catalog { background: linear-gradient(0deg, #F3F3F3 0%, #F3F3F3 100%), #FFF; }
.product-catalog .sec_product_catalog { padding: 0 0 160px; }
.product-catalog .sec_product_catalog .book_shelve { display: flex; gap: 80px; position: relative; padding: 0 80px; margin-bottom: 120px; }
.product-catalog .sec_product_catalog .book_shelve:last-child { margin-bottom: 0; }
.product-catalog .sec_product_catalog .book_shelve::before { content: ''; position: absolute; left: 0; bottom: 89px; z-index: 1; width: 100%; height: 14px; border: 1px solid #d9d9d9; background: #fff; box-shadow: 0px 8px 20px 0px rgba(0, 0, 0, 0.14); }
.product-catalog .sec_product_catalog .book a { display: flex; flex-direction: column; gap: 24px; }
.product-catalog .sec_product_catalog .book .cover { position: relative; width: 200px; height: 285px; }
.product-catalog .sec_product_catalog .book .cover::before { opacity: 0; content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%; z-index: 2; background: rgba(0, 0, 0, 0.40); backdrop-filter: blur(2px); transition: opacity .3s; }
.product-catalog .sec_product_catalog .book .cover::after { content: ''; position: absolute; bottom: -8px; right: -8px; width: 17px; height: 100%; background-image: url("/resources/cn/images/product-catalog/cover_shadow.svg"); background-repeat: no-repeat; background-size: cover; background-position: bottom; }
.product-catalog .sec_product_catalog .book .cover i { opacity: 0; visibility: hidden; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); z-index: 3; width: 40px; height: 40px; border-radius: 999px; background-color: #2C7CD8; transition: opacity .3s; }
.product-catalog .sec_product_catalog .book .cover i::before { content: ''; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 20px; height: 20px; background-image: url("/resources/cn/images/common/icon/ic_download.svg"); background-repeat: no-repeat; background-size: cover; background-position: center; }
.product-catalog .sec_product_catalog .book .cover img { position: relative; z-index: 1; width: 100%; height: 100%; object-fit: cover; }
.product-catalog .sec_product_catalog .book .title { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; min-height: 80px; }
.product-catalog .sec_product_catalog .book .title h3 { font-size: 20px; font-weight: 500; line-height: 1.5; letter-spacing: -0.6px; color: #333; }
.product-catalog .sec_product_catalog .book .title span { font-size: 12px; line-height: 1.3; letter-spacing: -0.24px; color: #666; }
.product-catalog .sec_product_catalog .book:hover .cover::before { opacity: 1; }
.product-catalog .sec_product_catalog .book:hover .cover i { opacity: 1; visibility: visible; }