:root{
      --theme:#0B3D91;
      --theme-dark:#072b67;
      --theme-soft:#eaf1ff;
      --ink:#142033;
      --muted:#667085;
      --line:#dfe5ee;
      --surface:#ffffff;
      --page:#f4f7fb;
      --night:#07101d;
      --green:#62ff85;
      --radius:16px;
      --shadow:0 16px 42px rgba(11,61,145,.12);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--ink);
      background:var(--page);
      font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans TC","PingFang TC","Microsoft JhengHei",sans-serif;
      line-height:1.65;
    }
    body.drawer-locked{overflow:hidden}
    img{display:block;max-width:100%}
    a{color:inherit;text-decoration:none}
    button,input,textarea,select{font:inherit}
    button{color:inherit}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}

    .topbar{
      color:#dce8ff;
      background:#061f49;
      font-size:13px;
    }
    .topbar-inner{
      min-height:36px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:24px;
    }
    .topbar-contact{display:flex;align-items:center;gap:20px}
    .topbar a{transition:color .2s ease}
    .topbar a:hover{color:#fff}

    .header{
      position:relative;
      z-index:40;
      background:rgba(255,255,255,.98);
      border-bottom:1px solid var(--line);
      box-shadow:0 5px 20px rgba(15,35,66,.05);
    }
    .header-inner{
      min-height:78px;
      display:flex;
      align-items:center;
      gap:24px;
    }
    .logo{
      min-width:0;
      display:inline-flex;
      align-items:center;
      gap:10px;
      color:var(--theme-dark);
      font-size:19px;
      font-weight:800;
    }
    .logo img{
      width:42px;
      height:42px;
      border-radius:10px;
      object-fit:contain;
      background:#fff;
    }
    .logo span{
      max-width:170px;
      overflow:hidden;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .main-nav{margin-left:auto;height:78px}
    .nav-list{
      height:100%;
      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;
      height:100%;
      padding:0 11px;
      color:#263650;
      font-size:14px;
      font-weight:700;
      white-space:nowrap;
      transition:color .2s ease,background .2s ease;
    }
    .nav-link:hover,.nav-item:focus-within>.nav-link{
      color:var(--theme);
      background:var(--theme-soft);
    }
    .has-arrow::after{
      content:"";
      width:6px;
      height:6px;
      margin-left:7px;
      border-right:1.5px solid currentColor;
      border-bottom:1.5px solid currentColor;
      transform:rotate(45deg) translateY(-2px);
    }
    .dropdown-panel,.mega-menu{
      position:absolute;
      top:100%;
      left:0;
      z-index:50;
      visibility:hidden;
      opacity:0;
      transform:translateY(8px);
      transition:opacity .18s ease,transform .18s ease,visibility .18s;
      border:1px solid var(--line);
      border-radius:0 0 16px 16px;
      background:#fff;
      box-shadow:0 24px 55px rgba(12,32,62,.18);
    }
    .dropdown-panel::before,.mega-menu::before{
      content:"";
      position:absolute;
      right:0;
      bottom:100%;
      left:0;
      height:10px;
    }
    .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{
      width:310px;
      padding:12px;
    }
    .dropdown-panel>a:not(.dropdown-footer){
      display:block;
      padding:10px 12px;
      border-radius:9px;
      color:#33425a;
      font-size:14px;
    }
    .dropdown-panel>a:not(.dropdown-footer):hover{background:var(--theme-soft);color:var(--theme)}
    .dropdown-footer,.mega-footer{
      display:block;
      margin-top:10px;
      padding:10px 12px;
      border-radius:9px;
      color:#fff;
      background:var(--theme);
      text-align:center;
      font-size:14px;
      font-weight:800;
    }
    .mega-menu{
      left:50%;
      width:650px;
      padding:18px;
      transform:translate(-50%,8px);
    }
    .nav-item:hover>.mega-menu,.nav-item:focus-within>.mega-menu{transform:translate(-50%,0)}
    .mega-wide{width:760px}
    .nav-item:nth-last-child(-n+3) .mega-menu{
      right:0;
      left:auto;
      transform:translateY(8px);
    }
    .nav-item:nth-last-child(-n+3):hover>.mega-menu,
    .nav-item:nth-last-child(-n+3):focus-within>.mega-menu{transform:translateY(0)}
    .mega-title{
      margin:0 0 12px;
      color:var(--theme-dark);
      font-size:15px;
      font-weight:850;
    }
    .mega-category-list{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      margin-bottom:14px;
    }
    .mega-category-list a{
      padding:6px 10px;
      border:1px solid #cbd8ec;
      border-radius:999px;
      color:#40516d;
      background:#f7f9fd;
      font-size:12px;
    }
    .mega-category-list a:hover{color:#fff;background:var(--theme);border-color:var(--theme)}
    .mega-grid{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:10px;
    }
    .mega-card{
      min-width:0;
      display:flex;
      align-items:center;
      gap:10px;
      padding:10px;
      border:1px solid #e4e9f1;
      border-radius:11px;
      background:#fff;
      transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
    }
    .mega-card:hover{
      transform:translateY(-2px);
      border-color:#aac0e5;
      box-shadow:0 8px 20px rgba(11,61,145,.1);
    }
    .mega-card img{
      width:54px;
      height:48px;
      flex:0 0 auto;
      border-radius:8px;
      object-fit:cover;
      background:#edf2fa;
    }
    .mega-card img.tool-icon{object-fit:contain;padding:7px}
    .mega-card-copy{min-width:0;display:grid;gap:2px}
    .mega-card-copy strong{
      overflow:hidden;
      color:#17243a;
      font-size:13px;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .mega-card-copy span{
      overflow:hidden;
      color:#6b7688;
      font-size:11px;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .header-btns{
      display:flex;
      align-items:center;
      gap:10px;
      white-space:nowrap;
    }
    .account-btn{
      padding:10px 14px;
      border-radius:9px;
      color:#fff;
      background:var(--theme);
      font-size:13px;
      font-weight:800;
    }
    .account-btn:hover{background:var(--theme-dark)}
    .hamburger{
      width:43px;
      height:43px;
      display:none;
      padding:10px;
      border:1px solid var(--line);
      border-radius:10px;
      background:#fff;
      cursor:pointer;
    }
    .hamburger span{
      display:block;
      width:100%;
      height:2px;
      margin:5px 0;
      border-radius:2px;
      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:80;
      visibility:hidden;
      opacity:0;
      background:rgba(4,15,33,.58);
      transition:opacity .25s ease,visibility .25s;
    }
    .drawer-overlay.open{visibility:visible;opacity:1}
    .mobile-drawer{
      position:fixed;
      top:0;
      right:0;
      bottom:0;
      z-index:90;
      width:min(390px,92vw);
      overflow-y:auto;
      background:#fff;
      box-shadow:-20px 0 55px rgba(0,0,0,.2);
      transform:translateX(105%);
      transition:transform .28s ease;
    }
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{
      min-height:72px;
      display:flex;
      align-items:center;
      gap:10px;
      padding:14px 18px;
      border-bottom:1px solid var(--line);
      background:#f8faff;
    }
    .drawer-head>a{
      padding:8px 10px;
      border-radius:8px;
      color:#fff;
      background:var(--theme);
      font-size:13px;
      font-weight:750;
    }
    .drawer-close{
      width:38px;
      height:38px;
      margin-left:auto;
      padding:0;
      border:1px solid var(--line);
      border-radius:9px;
      background:#fff;
      font-size:25px;
      line-height:1;
      cursor:pointer;
    }
    .drawer-menu{padding:12px 18px 28px}
    .drawer-link,.drawer-toggle{
      width:100%;
      display:flex;
      align-items:center;
      justify-content:space-between;
      padding:13px 4px;
      border:0;
      border-bottom:1px solid #e8edf4;
      color:#1b2a42;
      background:transparent;
      text-align:left;
      font-weight:800;
      cursor:pointer;
    }
    .drawer-toggle::after{
      content:"+";
      color:var(--theme);
      font-size:21px;
      font-weight:500;
    }
    .drawer-toggle.active::after{content:"−"}
    .drawer-submenu{
      display:none;
      padding:7px 0 8px 13px;
      border-left:2px solid #cbd9ef;
    }
    .drawer-submenu.open{display:grid}
    .drawer-submenu a{
      padding:9px 10px;
      border-radius:7px;
      color:#536078;
      font-size:14px;
    }
    .drawer-submenu a:hover{color:var(--theme);background:var(--theme-soft)}

    .video-detail-main{min-width:0;padding:42px 0 72px}
    .video-detail-main .video-breadcrumb{
      display:flex;
      flex-wrap:wrap;
      align-items:center;
      gap:8px;
      margin-bottom:20px;
      color:#718096;
      font-size:14px;
    }
    .video-detail-main .video-breadcrumb a{color:var(--theme);font-weight:750}
    .video-detail-main .video-breadcrumb span::before{
      content:"/";
      margin-right:8px;
      color:#a4adba;
    }
    .video-detail-main .video-shell{
      min-width:0;
      overflow:hidden;
      border:1px solid #16253a;
      border-radius:20px;
      background:#050b13;
      box-shadow:0 24px 60px rgba(3,13,29,.24);
    }
    .video-detail-main .player-stage{
      position:relative;
      min-width:0;
      aspect-ratio:16/9;
      overflow:hidden;
      background:
        radial-gradient(circle at 50% 42%,rgba(98,255,133,.12),transparent 35%),
        linear-gradient(145deg,#07111d,#02060b);
    }
    .video-detail-main .player-stage::before{
      content:"";
      position:absolute;
      inset:0;
      pointer-events:none;
      background-image:
        linear-gradient(rgba(98,255,133,.025) 1px,transparent 1px),
        linear-gradient(90deg,rgba(98,255,133,.025) 1px,transparent 1px);
      background-size:36px 36px;
    }
    .video-detail-main .player-stage iframe,
    .video-detail-main .player-stage video,
    .video-detail-main .player-stage embed,
    .video-detail-main .player-stage object{
      position:relative;
      z-index:2;
      width:100%!important;
      height:100%!important;
      max-width:100%;
      border:0;
    }
    .video-detail-main .player-stage img{width:100%;height:100%;object-fit:cover}
    .video-detail-main .video-heading{
      padding:25px 28px 27px;
      color:#fff;
      border-top:1px solid rgba(255,255,255,.08);
    }
    .video-detail-main .video-kicker{
      display:inline-flex;
      align-items:center;
      gap:7px;
      margin-bottom:9px;
      color:var(--green);
      font-size:12px;
      font-weight:850;
      letter-spacing:.08em;
    }
    .video-detail-main .video-kicker::before{
      content:"";
      width:8px;
      height:8px;
      border-radius:50%;
      background:var(--green);
      box-shadow:0 0 13px var(--green);
    }
    .video-detail-main h1{
      margin:0;
      font-size:clamp(27px,4vw,46px);
      line-height:1.2;
      letter-spacing:-.025em;
    }
    .video-detail-main .video-meta{
      display:flex;
      flex-wrap:wrap;
      gap:10px 18px;
      margin-top:17px;
      color:#aebbd0;
      font-size:14px;
    }
    .video-detail-main .video-meta span{
      display:inline-flex;
      align-items:center;
      gap:7px;
    }
    .video-detail-main .video-meta span::before{
      content:"";
      width:5px;
      height:5px;
      border-radius:50%;
      background:#5f7391;
    }
    .video-detail-main .content-grid{
      min-width:0;
      display:grid;
      grid-template-columns:minmax(0,1fr) 320px;
      gap:28px;
      margin-top:28px;
      align-items:start;
    }
    .video-detail-main .video-article,.video-detail-main .video-sidebar{
      min-width:0;
      border:1px solid var(--line);
      border-radius:var(--radius);
      background:#fff;
      box-shadow:0 10px 30px rgba(24,50,88,.06);
    }
    .video-detail-main .video-article{padding:30px}
    .video-detail-main .section-title{
      margin:0 0 16px;
      color:#17253b;
      font-size:21px;
      line-height:1.35;
    }
    .video-detail-main .video-summary{
      margin:0 0 24px;
      padding:18px 20px;
      border-left:4px solid var(--theme);
      border-radius:0 11px 11px 0;
      color:#3d4c63;
      background:var(--theme-soft);
    }
    .video-detail-main .video-body{
      min-width:0;
      max-width:100%;
      overflow-x:auto;
      color:#344258;
      font-size:16px;
    }
    .video-detail-main .video-body>*:first-child{margin-top:0}
    .video-detail-main .video-body>*:last-child{margin-bottom:0}
    .video-detail-main .video-body img,
    .video-detail-main .video-body video,
    .video-detail-main .video-body iframe,
    .video-detail-main .video-body table{
      max-width:100%;
    }
    .video-detail-main .video-body iframe{width:100%}
    .video-detail-main .video-body table{border-collapse:collapse}
    .video-detail-main .video-body th,.video-detail-main .video-body td{
      padding:9px;
      border:1px solid var(--line);
    }
    .video-detail-main .video-tags{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      margin-top:26px;
      padding-top:22px;
      border-top:1px solid var(--line);
    }
    .video-detail-main .video-tags strong{margin-right:3px;color:#263650}
    .video-detail-main .video-tags span{
      padding:6px 11px;
      border-radius:999px;
      color:var(--theme);
      background:var(--theme-soft);
      font-size:13px;
    }
    .video-detail-main .notice{
      margin-top:24px;
      padding:17px 19px;
      border:1px solid #d8e2f1;
      border-radius:11px;
      color:#57657a;
      background:#f8faff;
      font-size:14px;
    }
    .video-detail-main .video-sidebar{padding:22px;position:sticky;top:20px}
    .video-detail-main .sidebar-list{display:grid;gap:13px}
    .video-detail-main .related-card{
      min-width:0;
      display:grid;
      grid-template-columns:104px minmax(0,1fr);
      gap:11px;
      padding:10px;
      border:1px solid #e4eaf2;
      border-radius:12px;
      transition:transform .2s ease,border-color .2s ease;
    }
    .video-detail-main .related-card:hover{transform:translateY(-2px);border-color:#a8bce0}
    .video-detail-main .related-thumb{position:relative;overflow:hidden;border-radius:8px;background:#dfe7f3}
    .video-detail-main .related-thumb img{width:100%;height:72px;object-fit:cover}
    .video-detail-main .duration{
      position:absolute;
      right:5px;
      bottom:5px;
      padding:2px 5px;
      border-radius:4px;
      color:#fff;
      background:rgba(0,0,0,.75);
      font-size:10px;
    }
    .video-detail-main .related-copy{min-width:0}
    .video-detail-main .related-copy strong{
      display:-webkit-box;
      overflow:hidden;
      color:#1b2940;
      font-size:13px;
      line-height:1.45;
      -webkit-box-orient:vertical;
      -webkit-line-clamp:2;
    }
    .video-detail-main .related-copy span{
      display:block;
      margin-top:6px;
      color:#788497;
      font-size:11px;
    }
    .video-detail-main .sidebar-action{
      display:block;
      margin-top:17px;
      padding:11px 14px;
      border-radius:9px;
      color:#fff;
      background:var(--theme);
      text-align:center;
      font-size:14px;
      font-weight:800;
    }
    .video-detail-main .research-cta{
      display:grid;
      justify-items:center;
      gap:12px;
      margin-top:36px;
      padding:34px 24px;
      border-radius:18px;
      color:#fff;
      background:
        radial-gradient(circle at 50% 0,rgba(98,255,133,.15),transparent 42%),
        linear-gradient(135deg,#061329,#0b326e);
      text-align:center;
    }
    .video-detail-main .research-cta h2{margin:0;font-size:clamp(23px,3vw,34px)}
    .video-detail-main .research-cta p{max-width:700px;margin:0;color:#c9d6e9}
    .video-detail-main .cta-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-top:5px}
    .video-detail-main .cta-actions a{
      padding:10px 16px;
      border-radius:9px;
      color:#07152c;
      background:var(--green);
      font-weight:850;
    }
    .video-detail-main .cta-actions a:last-child{
      color:#fff;
      background:transparent;
      border:1px solid rgba(255,255,255,.35);
    }

    .footer{
      color:#c8d4e6;
      background:#071426;
      border-top:4px solid var(--theme);
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.45fr 1fr 1fr 1.1fr;
      gap:42px;
      padding:56px 0 40px;
    }
    .footer .logo{color:#fff}
    .footer .logo img{background:#fff}
    .footer-brand p{max-width:390px;margin:17px 0 0;color:#9eacc1;font-size:14px}
    .footer h3{margin:4px 0 16px;color:#fff;font-size:16px}
    .footer-links,.footer-contact{display:grid;gap:9px}
    .footer-links a,.footer-contact a,.footer-contact span{
      color:#aab8cc;
      font-size:14px;
      transition:color .2s ease;
    }
    .footer-links a:hover,.footer-contact a:hover{color:#fff}
    .footer-bottom{
      display:flex;
      justify-content:space-between;
      gap:20px;
      padding:20px 0 25px;
      border-top:1px solid rgba(255,255,255,.1);
      color:#8493a8;
      font-size:13px;
    }

    @media (max-width:1100px){
      .main-nav{display:none}
      .hamburger{display:block}
      .header-inner{min-height:70px}
      .header-btns{margin-left:auto}
      .content-grid{grid-template-columns:minmax(0,1fr) 290px}
    }
    @media (max-width:820px){
      .topbar-inner{padding:7px 0}
      .topbar-inner>span{display:none}
      .topbar-contact{width:100%;justify-content:space-between;gap:10px}
      .video-detail-main{padding:28px 0 52px}
      .video-detail-main .content-grid{grid-template-columns:1fr}
      .video-detail-main .video-sidebar{position:static}
      .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
    }
    @media (max-width:580px){
      .container{width:min(100% - 28px,1180px)}
      .topbar-contact{font-size:11px}
      .header-btns>.account-btn{display:none}
      .logo span{max-width:145px}
      .video-detail-main .video-shell{border-radius:13px}
      .video-detail-main .video-heading{padding:20px}
      .video-detail-main h1{font-size:27px}
      .video-detail-main .video-meta{gap:6px 12px;font-size:12px}
      .video-detail-main .video-article{padding:21px}
      .video-detail-main .related-card{grid-template-columns:112px minmax(0,1fr)}
      .footer-grid{grid-template-columns:1fr;padding:42px 0 30px}
      .footer-bottom{flex-direction:column;gap:6px}
    }