:root{
      --primary:#0B3D91;
      --primary-dark:#06265f;
      --primary-soft:#eaf2ff;
      --secondary:#087f8c;
      --foam:#f5fbff;
      --ink:#10233f;
      --muted:#64748b;
      --line:#dce6f2;
      --surface:#ffffff;
      --surface-alt:#f5f8fc;
      --danger:#b42318;
      --shadow:0 18px 48px rgba(11,61,145,.12);
      --radius:20px;
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--ink);
      background:#fff;
      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%;height:auto}
    a{color:inherit;text-decoration:none}
    button,input,textarea,select{font:inherit}
    button{cursor:pointer}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}

    .topbar{
      color:#dce9ff;
      background:var(--primary-dark);
      font-size:13px;
    }
    .topbar .container{
      min-height:38px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:24px;
    }
    .topbar-contact{display:flex;align-items:center;gap:22px}
    .topbar a:hover{color:#fff}

    .header{
      position:relative;
      z-index:50;
      background:rgba(255,255,255,.98);
      border-bottom:1px solid var(--line);
      box-shadow:0 5px 20px rgba(15,35,63,.04);
    }
    .header-inner{
      min-height:78px;
      display:flex;
      align-items:center;
      gap:26px;
    }
    .logo{
      display:inline-flex;
      align-items:center;
      gap:10px;
      min-width:0;
      color:var(--primary);
      font-weight:850;
      letter-spacing:.01em;
    }
    .logo img{
      width:42px;
      height:42px;
      object-fit:contain;
      border-radius:10px;
    }
    .logo span{
      max-width:170px;
      overflow:hidden;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .main-nav{margin-left:auto;align-self:stretch}
    .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{
      height:100%;
      display:flex;
      align-items:center;
      padding:0 12px;
      color:#263b58;
      font-size:14px;
      font-weight:700;
      white-space:nowrap;
    }
    .nav-link:hover,
    .nav-item:focus-within>.nav-link{
      color:var(--primary);
      background:var(--primary-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%;
      right:0;
      z-index:70;
      visibility:hidden;
      opacity:0;
      transform:translateY(8px);
      pointer-events:none;
      transition:.18s ease;
      border:1px solid var(--line);
      border-radius:0 0 18px 18px;
      background:#fff;
      box-shadow:var(--shadow);
    }
    .dropdown-panel::before,
    .mega-menu::before{
      content:"";
      position:absolute;
      right:0;
      bottom:100%;
      width:100%;
      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:none;
      pointer-events:auto;
    }
    .dropdown-panel{
      width:320px;
      padding:18px;
    }
    .dropdown-heading{
      margin:0 0 10px;
      color:var(--primary);
      font-size:13px;
      font-weight:800;
    }
    .dropdown-panel>a:not(.dropdown-all){
      display:block;
      padding:10px 0;
      border-bottom:1px solid #edf2f7;
      font-size:14px;
    }
    .dropdown-panel>a:hover{color:var(--primary)}
    .dropdown-all,
    .mega-footer{
      display:block;
      margin-top:12px;
      padding:11px 14px;
      border-radius:10px;
      color:#fff;
      background:var(--primary);
      text-align:center;
      font-size:14px;
      font-weight:800;
    }
    .mega-menu{
      right:-180px;
      width:min(900px,calc(100vw - 48px));
      padding:22px;
    }
    .mega-head{
      display:flex;
      align-items:flex-end;
      justify-content:space-between;
      gap:20px;
      margin-bottom:16px;
      padding-bottom:13px;
      border-bottom:1px solid var(--line);
    }
    .mega-head strong{color:var(--primary);font-size:18px}
    .mega-head span{color:var(--muted);font-size:13px}
    .mega-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:12px;
    }
    .mega-card{
      min-width:0;
      padding:13px;
      border:1px solid var(--line);
      border-radius:14px;
      background:#fff;
      transition:.18s ease;
    }
    .mega-card:hover{
      border-color:#99b9ea;
      transform:translateY(-2px);
      box-shadow:0 10px 25px rgba(11,61,145,.1);
    }
    .mega-card img{
      width:42px;
      height:42px;
      margin-bottom:9px;
      border-radius:9px;
      object-fit:cover;
      background:var(--surface-alt);
    }
    .video-mega .mega-card img,
    .product-mega .mega-card img{
      width:100%;
      height:92px;
    }
    .mega-card strong{
      display:block;
      overflow:hidden;
      color:#18304f;
      font-size:14px;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .mega-card p{
      display:-webkit-box;
      overflow:hidden;
      margin:6px 0 0;
      color:var(--muted);
      font-size:12px;
      line-height:1.55;
      -webkit-box-orient:vertical;
      -webkit-line-clamp:2;
    }
    .mega-meta{
      display:flex;
      flex-wrap:wrap;
      gap:5px 10px;
      margin-top:8px;
      color:var(--muted);
      font-size:11px;
    }
    .mega-category-list{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      margin-bottom:15px;
    }
    .mega-category-list a{
      padding:6px 11px;
      border-radius:999px;
      color:var(--primary);
      background:var(--primary-soft);
      font-size:12px;
      font-weight:700;
    }
    .header-btns{
      display:flex;
      align-items:center;
      gap:10px;
    }
    .member-slot{font-size:14px;white-space:nowrap}
    .open-account{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      min-height:42px;
      padding:0 17px;
      border-radius:11px;
      color:#fff;
      background:var(--primary);
      font-size:14px;
      font-weight:800;
      white-space:nowrap;
    }
    .open-account:hover{background:var(--primary-dark)}
    .hamburger{
      display:none;
      width:44px;
      height:44px;
      padding:10px;
      border:1px solid var(--line);
      border-radius:11px;
      background:#fff;
    }
    .hamburger span{
      display:block;
      width:100%;
      height:2px;
      margin:5px 0;
      background:var(--ink);
      transition:.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:90;
      visibility:hidden;
      opacity:0;
      background:rgba(3,14,32,.58);
      transition:.25s ease;
    }
    .drawer-overlay.open{visibility:visible;opacity:1}
    .mobile-drawer{
      position:fixed;
      top:0;
      right:0;
      bottom:0;
      z-index:100;
      width:min(390px,92vw);
      overflow-y:auto;
      transform:translateX(105%);
      background:#fff;
      box-shadow:-20px 0 60px rgba(3,14,32,.22);
      transition:.25s ease;
    }
    .mobile-drawer.open{transform:none}
    .drawer-head{
      position:sticky;
      top:0;
      z-index:2;
      display:flex;
      align-items:center;
      gap:10px;
      min-height:72px;
      padding:14px 18px;
      border-bottom:1px solid var(--line);
      background:#fff;
    }
    .drawer-member{margin-right:auto}
    .drawer-head>a{
      padding:8px 12px;
      border-radius:9px;
      color:#fff;
      background:var(--primary);
      font-size:13px;
      font-weight:800;
    }
    .drawer-close{
      width:38px;
      height:38px;
      border:0;
      border-radius:50%;
      color:var(--ink);
      background:var(--surface-alt);
      font-size:26px;
      line-height:1;
    }
    .drawer-menu{padding:12px 18px 28px}
    .drawer-link,
    .drawer-toggle{
      width:100%;
      display:flex;
      align-items:center;
      justify-content:space-between;
      padding:14px 5px;
      border:0;
      border-bottom:1px solid var(--line);
      color:var(--ink);
      background:transparent;
      text-align:left;
      font-weight:750;
    }
    .drawer-toggle::after{
      content:"+";
      color:var(--primary);
      font-size:20px;
    }
    .drawer-toggle.active::after{content:"−"}
    .drawer-submenu{
      display:none;
      padding:7px 0 10px 15px;
      border-bottom:1px solid var(--line);
    }
    .drawer-submenu.open{display:block}
    .drawer-submenu a{
      display:block;
      padding:9px 5px;
      color:var(--muted);
      font-size:14px;
    }
    .drawer-submenu a:hover{color:var(--primary)}

    .video-detail-main{
      min-width:0;
      padding:48px 0 82px;
      background:
        radial-gradient(circle at 15% 0,rgba(8,127,140,.09),transparent 28%),
        linear-gradient(180deg,#f6fbff 0,#fff 420px);
    }
    .video-detail-main .video-breadcrumb{
      display:flex;
      flex-wrap:wrap;
      gap:7px;
      margin-bottom:20px;
      color:var(--muted);
      font-size:14px;
    }
    .video-detail-main .video-breadcrumb a:hover{color:var(--primary)}
    .video-detail-main .video-hero{
      max-width:940px;
      margin:0 auto 28px;
      text-align:center;
    }
    .video-detail-main .video-kicker{
      display:inline-flex;
      align-items:center;
      gap:7px;
      margin-bottom:12px;
      padding:6px 12px;
      border:1px solid #c8defb;
      border-radius:999px;
      color:var(--primary);
      background:#fff;
      font-size:13px;
      font-weight:800;
    }
    .video-detail-main .video-kicker::before{
      content:"";
      width:8px;
      height:8px;
      border-radius:50%;
      background:var(--secondary);
      box-shadow:0 0 0 5px rgba(8,127,140,.12);
    }
    .video-detail-main h1{
      margin:0;
      color:#0b2448;
      font-size:clamp(32px,5vw,58px);
      line-height:1.13;
      letter-spacing:-.035em;
    }
    .video-detail-main .video-intro{
      max-width:780px;
      margin:18px auto 0;
      color:#53667e;
      font-size:18px;
    }
    .video-detail-main .video-meta{
      display:flex;
      flex-wrap:wrap;
      justify-content:center;
      gap:9px;
      margin-top:20px;
    }
    .video-detail-main .video-meta span,
    .video-detail-main .video-meta a{
      padding:7px 11px;
      border:1px solid var(--line);
      border-radius:999px;
      color:#53667e;
      background:#fff;
      font-size:13px;
    }
    .video-detail-main .player-shell{
      position:relative;
      overflow:hidden;
      width:min(1120px,100%);
      margin:0 auto;
      border:1px solid rgba(255,255,255,.12);
      border-radius:24px;
      background:#031126;
      box-shadow:0 28px 70px rgba(3,17,38,.25);
    }
    .video-detail-main .player-shell::before{
      content:"";
      display:block;
      padding-top:56.25%;
    }
    .video-detail-main .video-player{
      position:absolute;
      inset:0;
      overflow:hidden;
      display:flex;
      align-items:center;
      justify-content:center;
      color:#fff;
    }
    .video-detail-main .video-player iframe,
    .video-detail-main .video-player video,
    .video-detail-main .video-player embed,
    .video-detail-main .video-player object{
      width:100%;
      height:100%;
      border:0;
    }
    .video-detail-main .video-layout{
      display:grid;
      grid-template-columns:minmax(0,1fr) 310px;
      gap:28px;
      margin-top:32px;
      align-items:start;
    }
    .video-detail-main .video-article,
    .video-detail-main .video-sidebar-card{
      min-width:0;
      border:1px solid var(--line);
      border-radius:var(--radius);
      background:#fff;
      box-shadow:0 12px 35px rgba(11,61,145,.07);
    }
    .video-detail-main .video-article{padding:clamp(22px,4vw,42px)}
    .video-detail-main .video-article h2{
      margin:0 0 16px;
      color:#102b52;
      font-size:25px;
    }
    .video-detail-main .video-summary{
      margin:0 0 28px;
      padding:18px 20px;
      border-left:4px solid var(--secondary);
      border-radius:0 13px 13px 0;
      color:#435a75;
      background:#effafb;
      font-size:16px;
    }
    .video-detail-main .video-content{
      min-width:0;
      max-width:100%;
      overflow-x:auto;
      color:#263b58;
      font-size:16px;
    }
    .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 .video-actions{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:28px;
      padding-top:22px;
      border-top:1px solid var(--line);
    }
    .video-detail-main .source-link,
    .video-detail-main .more-link{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      min-height:43px;
      padding:0 16px;
      border-radius:11px;
      font-size:14px;
      font-weight:800;
    }
    .video-detail-main .source-link{color:#fff;background:var(--primary)}
    .video-detail-main .more-link{
      color:var(--primary);
      border:1px solid #b8cff1;
      background:var(--primary-soft);
    }
    .video-detail-main .video-sidebar{
      position:sticky;
      top:24px;
      display:grid;
      gap:18px;
    }
    .video-detail-main .video-sidebar-card{padding:21px}
    .video-detail-main .video-sidebar-card h2{
      margin:0 0 13px;
      color:#102b52;
      font-size:18px;
    }
    .video-detail-main .video-facts{
      display:grid;
      gap:0;
      margin:0;
    }
    .video-detail-main .video-facts div{
      display:flex;
      justify-content:space-between;
      gap:14px;
      padding:11px 0;
      border-bottom:1px solid var(--line);
    }
    .video-detail-main .video-facts div:last-child{border-bottom:0}
    .video-detail-main .video-facts dt{color:var(--muted);font-size:13px}
    .video-detail-main .video-facts dd{
      margin:0;
      color:#18304f;
      font-size:13px;
      font-weight:750;
      text-align:right;
    }
    .video-detail-main .risk-note{
      margin:0;
      color:#65758b;
      font-size:13px;
    }
    .video-detail-main .related-section{margin-top:58px}
    .video-detail-main .section-heading{
      display:flex;
      align-items:end;
      justify-content:space-between;
      gap:20px;
      margin-bottom:20px;
    }
    .video-detail-main .section-heading h2{
      margin:0;
      color:#102b52;
      font-size:30px;
    }
    .video-detail-main .section-heading p{margin:0;color:var(--muted)}
    .video-detail-main .related-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:18px;
    }
    .video-detail-main .related-video{
      overflow:hidden;
      min-width:0;
      border:1px solid var(--line);
      border-radius:17px;
      background:#fff;
      transition:.2s ease;
    }
    .video-detail-main .related-video:hover{
      transform:translateY(-4px);
      border-color:#a9c5ed;
      box-shadow:var(--shadow);
    }
    .video-detail-main .related-cover{
      position:relative;
      overflow:hidden;
      aspect-ratio:16/9;
      background:#dce8f7;
    }
    .video-detail-main .related-cover img{
      width:100%;
      height:100%;
      object-fit:cover;
      transition:.3s ease;
    }
    .video-detail-main .related-video:hover img{transform:scale(1.04)}
    .video-detail-main .related-duration{
      position:absolute;
      right:9px;
      bottom:9px;
      padding:3px 7px;
      border-radius:6px;
      color:#fff;
      background:rgba(3,17,38,.82);
      font-size:12px;
    }
    .video-detail-main .related-body{padding:16px}
    .video-detail-main .related-body h3{
      display:-webkit-box;
      overflow:hidden;
      margin:0;
      color:#18304f;
      font-size:16px;
      line-height:1.45;
      -webkit-box-orient:vertical;
      -webkit-line-clamp:2;
    }
    .video-detail-main .related-body p{
      display:-webkit-box;
      overflow:hidden;
      margin:8px 0 0;
      color:var(--muted);
      font-size:13px;
      -webkit-box-orient:vertical;
      -webkit-line-clamp:2;
    }

    .footer{
      color:#ced9e8;
      background:#061a38;
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.4fr .8fr .8fr 1fr;
      gap:42px;
      padding:58px 0 42px;
    }
    .footer .logo{color:#fff}
    .footer-brand p{
      max-width:410px;
      margin:18px 0;
      color:#aebed3;
      font-size:14px;
    }
    .footer-social{color:#fff}
    .footer h3{
      margin:5px 0 16px;
      color:#fff;
      font-size:16px;
    }
    .footer-links,
    .footer-contact{
      display:grid;
      gap:10px;
      color:#aebed3;
      font-size:14px;
    }
    .footer a:hover{color:#fff}
    .footer-bottom{
      display:flex;
      justify-content:space-between;
      gap:20px;
      padding:21px 0;
      border-top:1px solid rgba(255,255,255,.12);
      color:#9eb0c7;
      font-size:13px;
    }
    .footer-legal{display:flex;flex-wrap:wrap;gap:18px}

    @media (max-width:1100px){
      .main-nav{display:none}
      .hamburger{display:block}
      .header-inner{min-height:70px}
      .header-btns{margin-left:auto}
      .video-detail-main .video-layout{grid-template-columns:minmax(0,1fr) 280px}
    }

    @media (max-width:820px){
      .topbar-welcome{display:none}
      .topbar .container{justify-content:center}
      .video-detail-main{padding-top:34px}
      .video-detail-main .video-layout{grid-template-columns:1fr}
      .video-detail-main .video-sidebar{position:static;grid-template-columns:repeat(2,minmax(0,1fr))}
      .video-detail-main .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
      .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
    }

    @media (max-width:620px){
      .container{width:min(100% - 28px,1180px)}
      .topbar-contact{width:100%;justify-content:space-between;gap:10px}
      .topbar-contact a{font-size:11px}
      .logo span{max-width:110px}
      .member-slot,.open-account{display:none}
      .video-detail-main h1{font-size:34px}
      .video-detail-main .video-intro{font-size:16px}
      .video-detail-main .player-shell{border-radius:15px}
      .video-detail-main .video-sidebar{grid-template-columns:1fr}
      .video-detail-main .related-grid{grid-template-columns:1fr}
      .video-detail-main .section-heading{align-items:flex-start;flex-direction:column}
      .footer-grid{grid-template-columns:1fr;gap:28px;padding-top:44px}
      .footer-bottom{flex-direction:column}
    }