:root{
      --theme:#0B3D91;
      --template-theme:{主题色};
      --theme-dark:#06275f;
      --theme-deep:#071c42;
      --cyan:#14d9e6;
      --cyan-soft:#dffbfe;
      --ink:#10213f;
      --muted:#64748b;
      --line:#dbe3ef;
      --surface:#ffffff;
      --soft:#f3f6fa;
      --dark:#071327;
      --shadow:0 18px 45px rgba(11,61,145,.12);
      --radius:20px;
    }

    *{
      box-sizing:border-box;
    }

    html{
      scroll-behavior:smooth;
    }

    body{
      margin:0;
      color:var(--ink);
      background:var(--soft);
      font-family:-apple-system,BlinkMacSystemFont,"Pretendard","Noto Sans KR","Segoe UI",sans-serif;
      line-height:1.65;
      overflow-wrap:anywhere;
    }

    body.drawer-lock{
      overflow:hidden;
    }

    img{
      display:block;
      max-width:100%;
    }

    a{
      color:inherit;
      text-decoration:none;
    }

    button,
    input,
    textarea,
    select{
      font:inherit;
    }

    button{
      cursor:pointer;
    }

    .container{
      width:min(1180px,calc(100% - 40px));
      margin-inline:auto;
    }

    .skip-link{
      position:fixed;
      top:12px;
      left:12px;
      z-index:2000;
      padding:10px 16px;
      color:#fff;
      background:var(--theme);
      border-radius:10px;
      transform:translateY(-150%);
      transition:transform .2s ease;
    }

    .skip-link:focus{
      transform:translateY(0);
    }

    .topbar{
      color:#dce9ff;
      background:var(--theme-deep);
      font-size:13px;
    }

    .topbar-inner{
      min-height:38px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:24px;
    }

    .topbar-welcome{
      margin:0;
    }

    .topbar-contact{
      display:flex;
      align-items:center;
      gap:18px;
    }

    .topbar-contact a:hover,
    .topbar-contact a:focus-visible{
      color:var(--cyan);
    }

    .header{
      position:relative;
      z-index:100;
      background:rgba(255,255,255,.98);
      border-bottom:1px solid var(--line);
      box-shadow:0 8px 24px rgba(15,35,70,.05);
    }

    .header-inner{
      min-height:78px;
      display:flex;
      align-items:center;
      gap:28px;
    }

    .logo{
      flex:0 0 auto;
      display:inline-flex;
      align-items:center;
      gap:11px;
      color:var(--theme-dark);
      font-size:20px;
      font-weight:900;
      letter-spacing:-.03em;
    }

    .logo img{
      width:42px;
      height:42px;
      object-fit:contain;
      border-radius:11px;
    }

    .main-nav{
      min-width:0;
      margin-left:auto;
    }

    .nav-list{
      display:flex;
      align-items:stretch;
      gap:2px;
      margin:0;
      padding:0;
      list-style:none;
    }

    .nav-item{
      position:relative;
      display:flex;
      align-items:center;
    }

    .nav-link{
      display:flex;
      align-items:center;
      min-height:78px;
      padding:0 12px;
      color:#263b5e;
      font-size:14px;
      font-weight:750;
      white-space:nowrap;
    }

    .has-panel > .nav-link::after{
      width:6px;
      height:6px;
      margin:0 0 4px 7px;
      border-right:1.5px solid currentColor;
      border-bottom:1.5px solid currentColor;
      content:"";
      transform:rotate(45deg);
    }

    .nav-link:hover,
    .nav-link:focus-visible,
    .nav-item:focus-within > .nav-link{
      color:var(--theme);
    }

    .dropdown-panel,
    .mega-menu{
      position:absolute;
      top:100%;
      z-index:120;
      visibility:hidden;
      opacity:0;
      padding:22px;
      background:#fff;
      border:1px solid var(--line);
      border-radius:0 0 18px 18px;
      box-shadow:0 24px 55px rgba(8,31,71,.16);
      transform:translateY(8px);
      transition:opacity .18s ease,transform .18s ease,visibility .18s ease;
    }

    .dropdown-panel::before,
    .mega-menu::before{
      position:absolute;
      right:0;
      bottom:100%;
      left:0;
      height:10px;
      content:"";
    }

    .nav-item:hover > .dropdown-panel,
    .nav-item:hover > .mega-menu,
    .nav-item:focus-within > .dropdown-panel,
    .nav-item:focus-within > .mega-menu{
      visibility:visible;
      opacity:1;
      transform:translateY(0);
    }

    .dropdown-panel{
      left:0;
      width:330px;
    }

    .dropdown-title,
    .mega-title{
      margin:0 0 12px;
      color:var(--theme-dark);
      font-weight:900;
    }

    .dropdown-article{
      display:block;
      padding:10px 0;
      border-bottom:1px solid #edf1f7;
      color:#405373;
      font-size:14px;
    }

    .dropdown-article:hover,
    .dropdown-article:focus-visible{
      color:var(--theme);
    }

    .panel-more{
      display:inline-flex;
      margin-top:15px;
      color:var(--theme);
      font-size:14px;
      font-weight:800;
    }

    .mega-menu{
      left:50%;
      width:min(780px,calc(100vw - 48px));
      transform:translate(-50%,8px);
    }

    .nav-item:hover > .mega-menu,
    .nav-item:focus-within > .mega-menu{
      transform:translate(-50%,0);
    }

    .mega-wide{
      width:min(940px,calc(100vw - 48px));
    }

    .mega-layout{
      display:grid;
      grid-template-columns:190px minmax(0,1fr);
      gap:22px;
    }

    .mega-sidebar{
      padding:18px;
      color:#dfeaff;
      background:linear-gradient(145deg,var(--theme),var(--theme-deep));
      border-radius:15px;
    }

    .mega-sidebar .mega-title{
      color:#fff;
    }

    .mega-sidebar p{
      margin:0 0 16px;
      font-size:13px;
    }

    .mega-sidebar a{
      color:var(--cyan);
      font-size:13px;
      font-weight:850;
    }

    .mega-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:12px;
    }

    .mega-card{
      min-width:0;
      padding:14px;
      background:#f7f9fc;
      border:1px solid #e7edf5;
      border-radius:13px;
      transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
    }

    .mega-card:hover,
    .mega-card:focus-visible{
      border-color:#9dc6ed;
      box-shadow:0 10px 24px rgba(11,61,145,.1);
      transform:translateY(-2px);
    }

    .mega-card img{
      width:100%;
      height:70px;
      margin-bottom:9px;
      object-fit:contain;
      border-radius:9px;
      background:#fff;
    }

    .video-card img,
    .product-card img{
      object-fit:cover;
    }

    .mega-card strong,
    .mega-card small{
      display:block;
    }

    .mega-card strong{
      overflow:hidden;
      color:#162b4f;
      font-size:13px;
      text-overflow:ellipsis;
      white-space:nowrap;
    }

    .mega-card small{
      display:-webkit-box;
      margin-top:5px;
      overflow:hidden;
      color:var(--muted);
      font-size:11px;
      line-height:1.45;
      -webkit-box-orient:vertical;
      -webkit-line-clamp:2;
    }

    .mega-meta{
      display:flex;
      flex-wrap:wrap;
      gap:4px 9px;
      margin-top:7px;
      color:var(--theme);
      font-size:10px;
      font-weight:750;
    }

    .mega-categories{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      margin-bottom:18px;
    }

    .mega-categories a{
      padding:7px 11px;
      color:#315071;
      background:#edf4fb;
      border-radius:999px;
      font-size:12px;
      font-weight:750;
    }

    .header-btns{
      display:flex;
      align-items:center;
      gap:10px;
      flex:0 0 auto;
    }

    .member-entry{
      display:flex;
      align-items:center;
      font-size:14px;
    }

    .open-account{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      min-height:42px;
      padding:0 16px;
      color:#fff;
      background:var(--theme);
      border-radius:12px;
      font-size:14px;
      font-weight:850;
      box-shadow:0 9px 20px rgba(11,61,145,.2);
    }

    .open-account:hover,
    .open-account:focus-visible{
      background:var(--theme-dark);
    }

    .hamburger{
      display:none;
      width:44px;
      height:44px;
      padding:10px;
      background:#fff;
      border:1px solid var(--line);
      border-radius:12px;
    }

    .hamburger span{
      display:block;
      width:100%;
      height:2px;
      margin:5px 0;
      background:var(--theme-dark);
      transition:transform .2s ease,opacity .2s ease;
    }

    .hamburger.active span:nth-child(1){
      transform:translateY(7px) rotate(45deg);
    }

    .hamburger.active span:nth-child(2){
      opacity:0;
    }

    .hamburger.active span:nth-child(3){
      transform:translateY(-7px) rotate(-45deg);
    }

    .drawer-overlay{
      position:fixed;
      inset:0;
      z-index:300;
      visibility:hidden;
      opacity:0;
      background:rgba(5,17,39,.62);
      backdrop-filter:blur(3px);
      transition:opacity .25s ease,visibility .25s ease;
    }

    .drawer-overlay.open{
      visibility:visible;
      opacity:1;
    }

    .mobile-drawer{
      position:fixed;
      top:0;
      right:0;
      bottom:0;
      z-index:310;
      width:min(390px,90vw);
      overflow-y:auto;
      background:#fff;
      box-shadow:-20px 0 50px rgba(3,16,40,.22);
      transform:translateX(105%);
      transition:transform .28s ease;
    }

    .mobile-drawer.open{
      transform:translateX(0);
    }

    .drawer-head{
      position:sticky;
      top:0;
      z-index:2;
      min-height:76px;
      display:flex;
      align-items:center;
      gap:12px;
      padding:14px 20px;
      background:#fff;
      border-bottom:1px solid var(--line);
    }

    .drawer-head > a{
      color:var(--theme);
      font-size:14px;
      font-weight:850;
    }

    .drawer-close{
      width:40px;
      height:40px;
      margin-left:auto;
      color:#1d3558;
      background:#edf3f9;
      border:0;
      border-radius:50%;
      font-size:26px;
      line-height:1;
    }

    .drawer-menu{
      padding:14px 20px 32px;
    }

    .drawer-link,
    .drawer-toggle{
      width:100%;
      min-height:52px;
      display:flex;
      align-items:center;
      padding:0 4px;
      color:#1c3153;
      background:transparent;
      border:0;
      border-bottom:1px solid #edf1f6;
      font-weight:850;
      text-align:left;
    }

    .drawer-toggle{
      justify-content:space-between;
    }

    .drawer-toggle::after{
      width:8px;
      height:8px;
      margin-right:6px;
      border-right:2px solid var(--theme);
      border-bottom:2px solid var(--theme);
      content:"";
      transform:rotate(45deg);
      transition:transform .2s ease;
    }

    .drawer-toggle.active::after{
      transform:rotate(225deg);
    }

    .drawer-submenu{
      display:none;
      padding:6px 0 10px 14px;
      border-bottom:1px solid #edf1f6;
    }

    .drawer-submenu.open{
      display:block;
    }

    .drawer-submenu a{
      display:block;
      padding:9px 10px;
      color:#566984;
      font-size:14px;
      border-radius:8px;
    }

    .drawer-submenu a:hover,
    .drawer-submenu a:focus-visible{
      color:var(--theme);
      background:#edf5ff;
    }

    .video-detail-main{
      min-width:0;
      padding:48px 0 82px;
    }

    .video-detail-main .video-breadcrumb{
      display:flex;
      flex-wrap:wrap;
      align-items:center;
      gap:8px;
      margin-bottom:20px;
      color:#667892;
      font-size:14px;
    }

    .video-detail-main .video-breadcrumb a{
      color:var(--theme);
      font-weight:750;
    }

    .video-detail-main .video-breadcrumb span + span::before{
      margin-right:8px;
      color:#9aa8ba;
      content:"/";
    }

    .video-detail-main .video-shell{
      overflow:hidden;
      color:#fff;
      background:linear-gradient(145deg,#050d1b,#092554);
      border:1px solid rgba(72,156,224,.25);
      border-radius:26px;
      box-shadow:0 28px 70px rgba(5,24,58,.25);
    }

    .video-detail-main .video-head{
      padding:30px 34px 25px;
      border-bottom:1px solid rgba(255,255,255,.11);
    }

    .video-detail-main .video-kicker{
      display:inline-flex;
      align-items:center;
      gap:8px;
      margin:0 0 12px;
      color:var(--cyan);
      font-size:13px;
      font-weight:900;
      letter-spacing:.08em;
    }

    .video-detail-main .video-kicker::before{
      width:9px;
      height:9px;
      background:var(--cyan);
      border-radius:50%;
      box-shadow:0 0 15px var(--cyan);
      content:"";
    }

    .video-detail-main h1{
      max-width:900px;
      margin:0;
      font-size:clamp(30px,4vw,52px);
      line-height:1.2;
      letter-spacing:-.045em;
    }

    .video-detail-main .video-meta{
      display:flex;
      flex-wrap:wrap;
      gap:10px 20px;
      margin-top:18px;
      color:#b9c9df;
      font-size:14px;
    }

    .video-detail-main .video-meta span{
      display:inline-flex;
      align-items:center;
      gap:7px;
    }

    .video-detail-main .player-frame{
      position:relative;
      width:100%;
      min-height:320px;
      aspect-ratio:16/9;
      overflow:hidden;
      background:#020713;
    }

    .video-detail-main .player-frame > *{
      max-width:100%;
    }

    .video-detail-main .player-frame iframe,
    .video-detail-main .player-frame video{
      width:100%;
      height:100%;
      border:0;
    }

    .video-detail-main .video-lower{
      display:grid;
      grid-template-columns:minmax(0,1fr) 280px;
      gap:24px;
      padding:28px 34px 34px;
    }

    .video-detail-main .video-summary{
      min-width:0;
    }

    .video-detail-main .video-summary h2,
    .video-detail-main .video-info-panel h2,
    .video-detail-main .content-panel h2,
    .video-detail-main .related-section h2,
    .video-detail-main .category-section h2{
      margin:0 0 14px;
      letter-spacing:-.03em;
    }

    .video-detail-main .video-summary p{
      margin:0;
      color:#cfdaea;
      font-size:16px;
    }

    .video-detail-main .video-tags{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      margin-top:20px;
    }

    .video-detail-main .video-tags span{
      padding:7px 11px;
      color:var(--cyan);
      background:rgba(20,217,230,.1);
      border:1px solid rgba(20,217,230,.23);
      border-radius:999px;
      font-size:13px;
    }

    .video-detail-main .video-info-panel{
      padding:20px;
      background:rgba(255,255,255,.07);
      border:1px solid rgba(255,255,255,.11);
      border-radius:17px;
    }

    .video-detail-main .video-info-list{
      display:grid;
      gap:12px;
      margin:0;
    }

    .video-detail-main .video-info-list div{
      padding-bottom:11px;
      border-bottom:1px solid rgba(255,255,255,.09);
    }

    .video-detail-main .video-info-list div:last-child{
      padding-bottom:0;
      border-bottom:0;
    }

    .video-detail-main .video-info-list dt{
      color:#91a6c4;
      font-size:12px;
    }

    .video-detail-main .video-info-list dd{
      margin:3px 0 0;
      color:#fff;
      font-weight:750;
    }

    .video-detail-main .content-panel{
      min-width:0;
      max-width:100%;
      margin-top:28px;
      padding:32px;
      overflow-x:auto;
      background:#fff;
      border:1px solid var(--line);
      border-radius:22px;
      box-shadow:var(--shadow);
    }

    .video-detail-main .video-content{
      min-width:0;
      max-width:100%;
      color:#334864;
    }

    .video-detail-main .video-content img,
    .video-detail-main .video-content video,
    .video-detail-main .video-content iframe,
    .video-detail-main .video-content table{
      max-width:100%;
    }

    .video-detail-main .video-content table{
      width:100%;
      border-collapse:collapse;
    }

    .video-detail-main .video-content th,
    .video-detail-main .video-content td{
      padding:10px;
      border:1px solid var(--line);
    }

    .video-detail-main .section-head{
      display:flex;
      align-items:end;
      justify-content:space-between;
      gap:20px;
      margin-bottom:20px;
    }

    .video-detail-main .section-head p{
      margin:5px 0 0;
      color:var(--muted);
    }

    .video-detail-main .related-section,
    .video-detail-main .category-section{
      margin-top:48px;
    }

    .video-detail-main .related-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:20px;
    }

    .video-detail-main .related-card{
      min-width:0;
      overflow:hidden;
      background:#fff;
      border:1px solid var(--line);
      border-radius:18px;
      box-shadow:0 12px 30px rgba(11,61,145,.08);
      transition:transform .2s ease,box-shadow .2s ease;
    }

    .video-detail-main .related-card:hover,
    .video-detail-main .related-card:focus-visible{
      transform:translateY(-4px);
      box-shadow:0 20px 40px rgba(11,61,145,.15);
    }

    .video-detail-main .related-cover{
      position:relative;
      aspect-ratio:16/9;
      overflow:hidden;
      background:#dce6f2;
    }

    .video-detail-main .related-cover img{
      width:100%;
      height:100%;
      object-fit:cover;
      transition:transform .3s ease;
    }

    .video-detail-main .related-card:hover .related-cover img{
      transform:scale(1.04);
    }

    .video-detail-main .duration{
      position:absolute;
      right:10px;
      bottom:10px;
      padding:4px 8px;
      color:#fff;
      background:rgba(4,12,28,.8);
      border-radius:7px;
      font-size:12px;
      font-weight:800;
    }

    .video-detail-main .play-mark{
      position:absolute;
      inset:50% auto auto 50%;
      width:48px;
      height:48px;
      display:grid;
      place-items:center;
      color:var(--theme-deep);
      background:rgba(255,255,255,.92);
      border-radius:50%;
      transform:translate(-50%,-50%);
      box-shadow:0 8px 20px rgba(0,0,0,.18);
    }

    .video-detail-main .play-mark::after{
      margin-left:3px;
      border-top:7px solid transparent;
      border-bottom:7px solid transparent;
      border-left:11px solid var(--theme);
      content:"";
    }

    .video-detail-main .related-body{
      padding:18px;
    }

    .video-detail-main .related-body h3{
      display:-webkit-box;
      margin:0;
      overflow:hidden;
      color:#142a4c;
      font-size:17px;
      line-height:1.45;
      -webkit-box-orient:vertical;
      -webkit-line-clamp:2;
    }

    .video-detail-main .related-body p{
      display:-webkit-box;
      margin:9px 0 0;
      overflow:hidden;
      color:var(--muted);
      font-size:14px;
      -webkit-box-orient:vertical;
      -webkit-line-clamp:2;
    }

    .video-detail-main .category-links{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
    }

    .video-detail-main .category-link{
      display:inline-flex;
      align-items:center;
      gap:9px;
      padding:11px 16px;
      color:var(--theme);
      background:#fff;
      border:1px solid #bfd2e7;
      border-radius:999px;
      font-size:14px;
      font-weight:850;
      transition:background .18s ease,color .18s ease,border-color .18s ease;
    }

    .video-detail-main .category-link::after{
      content:"→";
    }

    .video-detail-main .category-link:hover,
    .video-detail-main .category-link:focus-visible{
      color:#fff;
      background:var(--theme);
      border-color:var(--theme);
    }

    .video-detail-main .notice{
      margin-top:36px;
      padding:20px 22px;
      color:#405571;
      background:var(--cyan-soft);
      border-left:4px solid var(--cyan);
      border-radius:0 14px 14px 0;
      font-size:14px;
    }

    .footer{
      color:#c5d2e5;
      background:var(--dark);
    }

    .footer-main{
      display:grid;
      grid-template-columns:1.4fr .8fr .8fr 1fr;
      gap:42px;
      padding-top:62px;
      padding-bottom:48px;
    }

    .footer .logo{
      color:#fff;
    }

    .footer-brand p{
      max-width:360px;
      margin:18px 0;
      color:#9fb0c8;
      font-size:14px;
    }

    .footer-social{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
    }

    .footer h2{
      margin:8px 0 18px;
      color:#fff;
      font-size:16px;
    }

    .footer-links{
      display:grid;
      gap:10px;
    }

    .footer-links a,
    .footer-contact a{
      color:#aab9ce;
      font-size:14px;
    }

    .footer-links a:hover,
    .footer-links a:focus-visible,
    .footer-contact a:hover,
    .footer-contact a:focus-visible{
      color:var(--cyan);
    }

    .footer-contact address{
      display:grid;
      gap:10px;
      color:#8fa1ba;
      font-size:14px;
      font-style:normal;
    }

    .footer-bottom{
      min-height:72px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
      border-top:1px solid rgba(255,255,255,.1);
      color:#8597b1;
      font-size:13px;
    }

    .footer-bottom-links{
      display:flex;
      gap:18px;
    }

    .footer-bottom-links a:hover,
    .footer-bottom-links a:focus-visible{
      color:var(--cyan);
    }

    @media (max-width:1100px){
      .main-nav{
        display:none;
      }

      .hamburger{
        display:block;
      }

      .header-inner{
        min-height:70px;
      }

      .header-btns{
        margin-left:auto;
      }

      .footer-main{
        grid-template-columns:repeat(2,minmax(0,1fr));
      }
    }

    @media (max-width:820px){
      .video-detail-main{
        padding-top:32px;
      }

      .video-detail-main .video-lower{
        grid-template-columns:1fr;
      }

      .video-detail-main .related-grid{
        grid-template-columns:repeat(2,minmax(0,1fr));
      }
    }

    @media (max-width:640px){
      .container{
        width:min(100% - 28px,1180px);
      }

      .topbar-inner{
        min-height:44px;
      }

      .topbar-welcome{
        display:none;
      }

      .topbar-contact{
        width:100%;
        justify-content:space-between;
        gap:10px;
        font-size:11px;
      }

      .header-inner{
        gap:12px;
      }

      .header .logo span{
        max-width:120px;
        overflow:hidden;
        text-overflow:ellipsis;
        white-space:nowrap;
      }

      .header-btns .member-entry,
      .header-btns .open-account{
        display:none;
      }

      .video-detail-main{
        padding-bottom:56px;
      }

      .video-detail-main .video-head{
        padding:24px 20px 20px;
      }

      .video-detail-main h1{
        font-size:30px;
      }

      .video-detail-main .video-meta{
        display:grid;
        gap:7px;
      }

      .video-detail-main .player-frame{
        min-height:190px;
      }

      .video-detail-main .video-lower{
        padding:22px 20px 24px;
      }

      .video-detail-main .content-panel{
        padding:22px 19px;
      }

      .video-detail-main .section-head{
        display:block;
      }

      .video-detail-main .related-grid{
        grid-template-columns:1fr;
      }

      .footer-main{
        grid-template-columns:1fr;
        gap:28px;
        padding-top:45px;
      }

      .footer-bottom{
        align-items:flex-start;
        flex-direction:column;
        padding:20px 0;
      }
    }