:root{
      --theme:#0B3D91;
      --theme-dark:#072b68;
      --theme-soft:#eaf1ff;
      --accent:#d91576;
      --ink:#172033;
      --muted:#667085;
      --line:#e4e8f0;
      --surface:#ffffff;
      --page:#f5f7fb;
      --dark:#091426;
      --radius:16px;
      --shadow:0 14px 40px rgba(11,61,145,.10);
    }
    *{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,button,input,textarea{font:inherit}
    img{display:block;max-width:100%}
    a{color:inherit;text-decoration:none}
    button{color:inherit}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}
    .topbar{
      position:relative;
      z-index:110;
      color:#dbe7ff;
      background:var(--theme-dark);
      font-size:13px;
    }
    .topbar .container{
      min-height:36px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
    }
    .topbar-links{display:flex;align-items:center;gap:22px}
    .topbar a:hover{color:#fff}
    .header{
      position:sticky;
      top:0;
      z-index:100;
      background:rgba(255,255,255,.97);
      border-bottom:1px solid var(--line);
      box-shadow:0 4px 20px rgba(17,24,39,.04);
      backdrop-filter:blur(14px);
    }
    .header-inner{
      min-height:76px;
      display:flex;
      align-items:center;
      gap:24px;
    }
    .logo{
      flex:0 0 auto;
      display:flex;
      align-items:center;
      gap:10px;
      color:var(--theme);
      font-size:19px;
      font-weight:800;
    }
    .logo img{
      width:42px;
      height:42px;
      object-fit:contain;
      border-radius:10px;
    }
    .main-nav{min-width:0;flex:1}
    .nav-list{
      margin:0;
      padding:0;
      display:flex;
      justify-content:center;
      align-items:stretch;
      list-style:none;
    }
    .nav-item{position:relative}
    .nav-link{
      min-height:76px;
      padding:0 12px;
      display:flex;
      align-items:center;
      gap:6px;
      color:#27344c;
      font-size:14px;
      font-weight:700;
      white-space:nowrap;
    }
    .nav-link:hover,.nav-item:focus-within>.nav-link{color:var(--theme)}
    .has-arrow::after{
      content:"";
      width:6px;
      height:6px;
      margin-top:-4px;
      border-right:1.5px solid currentColor;
      border-bottom:1.5px solid currentColor;
      transform:rotate(45deg);
      transition:.2s ease;
    }
    .nav-item:hover .has-arrow::after,
    .nav-item:focus-within .has-arrow::after{transform:translateY(3px) rotate(225deg)}
    .dropdown-panel,.mega-menu{
      position:absolute;
      top:100%;
      left:50%;
      z-index:120;
      padding:22px;
      visibility:hidden;
      opacity:0;
      background:#fff;
      border:1px solid var(--line);
      border-radius:0 0 16px 16px;
      box-shadow:0 24px 55px rgba(15,23,42,.16);
      transform:translate(-50%,8px);
      transition:opacity .18s ease,transform .18s ease,visibility .18s ease;
    }
    .dropdown-panel::before,.mega-menu::before{
      content:"";
      position:absolute;
      left:0;
      right:0;
      top:-10px;
      height:12px;
    }
    .dropdown-panel{width:340px}
    .mega-menu{width:min(760px,82vw)}
    .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:translate(-50%,0);
    }
    .panel-title{
      margin:0 0 14px;
      color:var(--theme);
      font-size:13px;
      font-weight:800;
      letter-spacing:.08em;
    }
    .panel-list{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:8px;
    }
    .panel-list a{
      min-width:0;
      padding:9px 11px;
      overflow:hidden;
      color:#344054;
      background:#f7f9fc;
      border-radius:8px;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .panel-list a:hover{color:var(--theme);background:var(--theme-soft)}
    .mega-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:10px;
    }
    .mega-card{
      min-width:0;
      padding:11px;
      display:flex;
      align-items:center;
      gap:10px;
      border:1px solid var(--line);
      border-radius:11px;
      transition:.2s ease;
    }
    .mega-card:hover{
      border-color:#a8bee7;
      box-shadow:0 8px 22px rgba(11,61,145,.09);
      transform:translateY(-2px);
    }
    .mega-card img{
      flex:0 0 auto;
      width:44px;
      height:44px;
      object-fit:cover;
      background:#eef2f7;
      border-radius:9px;
    }
    .mega-card span{min-width:0}
    .mega-card strong,.mega-card small{
      display:block;
      overflow:hidden;
      text-overflow:ellipsis;
    }
    .mega-card strong{
      color:#1f2a44;
      font-size:13px;
      white-space:nowrap;
    }
    .mega-card small{
      margin-top:2px;
      color:var(--muted);
      font-size:11px;
      white-space:nowrap;
    }
    .mega-footer{
      margin-top:16px;
      padding:10px 13px;
      display:flex;
      justify-content:center;
      color:#fff;
      background:var(--theme);
      border-radius:9px;
      font-size:13px;
      font-weight:800;
    }
    .mega-footer:hover{background:var(--theme-dark)}
    .header-btns{
      flex:0 0 auto;
      display:flex;
      align-items:center;
      gap:9px;
    }
    .member-link,.account-link{
      min-height:40px;
      padding:8px 14px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      border-radius:9px;
      font-size:13px;
      font-weight:800;
    }
    .member-link{color:var(--theme);border:1px solid #bfd0ee;background:#fff}
    .account-link{color:#fff;background:var(--theme)}
    .member-link:hover{background:var(--theme-soft)}
    .account-link:hover{background:var(--theme-dark)}
    .hamburger{
      width:42px;
      height:42px;
      padding:10px;
      display:none;
      flex-direction:column;
      align-items:center;
      justify-content:center;
      gap:5px;
      background:#fff;
      border:1px solid var(--line);
      border-radius:9px;
      cursor:pointer;
    }
    .hamburger span{
      width:19px;
      height:2px;
      display:block;
      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:190;
      visibility:hidden;
      opacity:0;
      background:rgba(5,13,29,.58);
      transition:.25s ease;
    }
    .drawer-overlay.open{visibility:visible;opacity:1}
    .mobile-drawer{
      position:fixed;
      top:0;
      right:0;
      bottom:0;
      z-index:200;
      width:min(390px,90vw);
      overflow-y:auto;
      background:#fff;
      box-shadow:-20px 0 50px rgba(0,0,0,.18);
      transform:translateX(104%);
      transition:transform .28s ease;
    }
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{
      min-height:72px;
      padding:14px 18px;
      display:flex;
      align-items:center;
      gap:12px;
      color:#fff;
      background:var(--theme);
    }
    .drawer-head strong{min-width:0;flex:1}
    .drawer-head>a{
      padding:7px 12px;
      color:var(--theme);
      background:#fff;
      border-radius:8px;
      font-size:13px;
      font-weight:800;
    }
    .drawer-close{
      width:36px;
      height:36px;
      padding:0;
      color:#fff;
      background:transparent;
      border:0;
      font-size:28px;
      line-height:1;
      cursor:pointer;
    }
    .drawer-menu{padding:14px 18px 30px}
    .drawer-link,.drawer-toggle{
      width:100%;
      min-height:48px;
      padding:12px 4px;
      display:flex;
      align-items:center;
      color:#25324a;
      background:transparent;
      border:0;
      border-bottom:1px solid var(--line);
      font-weight:750;
      text-align:left;
      cursor:pointer;
    }
    .drawer-toggle{justify-content:space-between}
    .drawer-toggle::after{
      content:"+";
      color:var(--theme);
      font-size:20px;
      font-weight:500;
    }
    .drawer-toggle.active::after{content:"−"}
    .drawer-submenu{
      max-height:0;
      overflow:hidden;
      background:#f7f9fc;
      transition:max-height .3s ease;
    }
    .drawer-submenu.open{
      max-height:620px;
      padding:7px 0;
    }
    .drawer-submenu a{
      padding:9px 15px;
      display:block;
      color:#556176;
      font-size:14px;
    }
    .drawer-submenu a:hover{color:var(--theme);background:var(--theme-soft)}
    .video-detail-main{min-width:0}
    .video-detail-main .video-heading{
      padding:50px 0 28px;
      background:
        radial-gradient(circle at 85% 10%,rgba(217,21,118,.12),transparent 28%),
        linear-gradient(180deg,#fff,#f5f7fb);
      border-bottom:1px solid var(--line);
    }
    .video-detail-main .breadcrumbs{
      margin-bottom:18px;
      display:flex;
      flex-wrap:wrap;
      align-items:center;
      gap:8px;
      color:var(--muted);
      font-size:13px;
    }
    .video-detail-main .breadcrumbs a:hover{color:var(--theme)}
    .video-detail-main .eyebrow{
      margin:0 0 10px;
      color:var(--accent);
      font-size:13px;
      font-weight:850;
      letter-spacing:.08em;
    }
    .video-detail-main h1{
      max-width:950px;
      margin:0;
      color:#121a2b;
      font-size:clamp(30px,4vw,50px);
      line-height:1.18;
      letter-spacing:-.025em;
    }
    .video-detail-main .video-meta{
      margin-top:19px;
      display:flex;
      flex-wrap:wrap;
      gap:10px;
    }
    .video-detail-main .video-meta span{
      padding:7px 11px;
      color:#536075;
      background:#fff;
      border:1px solid var(--line);
      border-radius:999px;
      font-size:13px;
    }
    .video-detail-main .watch-section{padding:36px 0 66px}
    .video-detail-main .watch-grid{
      display:grid;
      grid-template-columns:minmax(0,1fr) 310px;
      align-items:start;
      gap:24px;
    }
    .video-detail-main .primary-column{min-width:0}
    .video-detail-main .player-frame{
      position:relative;
      width:100%;
      min-height:420px;
      overflow:hidden;
      color:#fff;
      background:#050914;
      border:1px solid #15213b;
      border-radius:18px;
      box-shadow:0 24px 60px rgba(5,13,29,.22);
      aspect-ratio:16/9;
    }
    .video-detail-main .player-frame iframe,
    .video-detail-main .player-frame video,
    .video-detail-main .player-frame embed,
    .video-detail-main .player-frame object{
      width:100%;
      height:100%;
      border:0;
    }
    .video-detail-main .player-frame img{width:100%;height:100%;object-fit:cover}
    .video-detail-main .video-summary,
    .video-detail-main .video-content,
    .video-detail-main .related-section,
    .video-detail-main .side-panel{
      background:#fff;
      border:1px solid var(--line);
      border-radius:var(--radius);
      box-shadow:0 8px 25px rgba(15,23,42,.04);
    }
    .video-detail-main .video-summary{margin-top:22px;padding:25px}
    .video-detail-main .section-label{
      margin:0 0 12px;
      color:var(--theme);
      font-size:19px;
    }
    .video-detail-main .video-summary p{margin:0;color:#4d596e}
    .video-detail-main .video-tags{
      margin-top:18px;
      padding-top:17px;
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      border-top:1px solid var(--line);
    }
    .video-detail-main .video-tags strong{font-size:13px}
    .video-detail-main .video-tags span{
      padding:5px 10px;
      color:var(--accent);
      background:#fff0f7;
      border-radius:999px;
      font-size:12px;
    }
    .video-detail-main .video-content{
      min-width:0;
      max-width:100%;
      margin-top:22px;
      padding:28px;
      overflow-x:auto;
    }
    .video-detail-main .video-content img,
    .video-detail-main .video-content table,
    .video-detail-main .video-content iframe,
    .video-detail-main .video-content video{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:11px;
      border:1px solid var(--line);
    }
    .video-detail-main .video-content h2,
    .video-detail-main .video-content h3{color:#17233c;line-height:1.35}
    .video-detail-main .side-panel{
      position:sticky;
      top:100px;
      padding:21px;
    }
    .video-detail-main .side-panel h2{
      margin:0 0 7px;
      font-size:18px;
    }
    .video-detail-main .side-panel>p{
      margin:0 0 17px;
      color:var(--muted);
      font-size:13px;
    }
    .video-detail-main .side-list{display:grid;gap:12px}
    .video-detail-main .side-video{
      padding:10px;
      display:grid;
      grid-template-columns:90px minmax(0,1fr);
      gap:10px;
      border:1px solid var(--line);
      border-radius:11px;
      transition:.2s ease;
    }
    .video-detail-main .side-video:hover{
      border-color:#a9bfe7;
      transform:translateY(-2px);
    }
    .video-detail-main .side-video img{
      width:90px;
      height:62px;
      object-fit:cover;
      background:#e9edf4;
      border-radius:7px;
    }
    .video-detail-main .side-video strong{
      display:-webkit-box;
      overflow:hidden;
      color:#26324a;
      font-size:13px;
      line-height:1.4;
      -webkit-box-orient:vertical;
      -webkit-line-clamp:2;
    }
    .video-detail-main .side-video small{
      margin-top:5px;
      display:block;
      color:var(--muted);
      font-size:11px;
    }
    .video-detail-main .category-cta{
      margin-top:17px;
      min-height:42px;
      display:flex;
      align-items:center;
      justify-content:center;
      color:#fff;
      background:var(--theme);
      border-radius:9px;
      font-size:13px;
      font-weight:800;
    }
    .video-detail-main .category-cta:hover{background:var(--theme-dark)}
    .video-detail-main .related-section{
      margin-top:24px;
      padding:26px;
    }
    .video-detail-main .related-head{
      margin-bottom:18px;
      display:flex;
      justify-content:space-between;
      align-items:end;
      gap:20px;
    }
    .video-detail-main .related-head h2{margin:0;font-size:23px}
    .video-detail-main .related-head a{color:var(--theme);font-size:13px;font-weight:800}
    .video-detail-main .related-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:16px;
    }
    .video-detail-main .related-card{
      min-width:0;
      overflow:hidden;
      background:#fff;
      border:1px solid var(--line);
      border-radius:13px;
      transition:.2s ease;
    }
    .video-detail-main .related-card:hover{
      border-color:#9fb8e5;
      box-shadow:0 12px 28px rgba(11,61,145,.09);
      transform:translateY(-3px);
    }
    .video-detail-main .related-cover{
      position:relative;
      aspect-ratio:16/9;
      overflow:hidden;
      background:#e8edf5;
    }
    .video-detail-main .related-cover img{width:100%;height:100%;object-fit:cover}
    .video-detail-main .duration{
      position:absolute;
      right:8px;
      bottom:8px;
      padding:3px 7px;
      color:#fff;
      background:rgba(0,0,0,.76);
      border-radius:5px;
      font-size:11px;
    }
    .video-detail-main .related-body{padding:14px}
    .video-detail-main .related-body strong{
      display:-webkit-box;
      overflow:hidden;
      line-height:1.45;
      -webkit-box-orient:vertical;
      -webkit-line-clamp:2;
    }
    .video-detail-main .related-body p{
      margin:7px 0 0;
      display:-webkit-box;
      overflow:hidden;
      color:var(--muted);
      font-size:12px;
      -webkit-box-orient:vertical;
      -webkit-line-clamp:2;
    }
    .video-detail-main .risk-note{
      margin-top:22px;
      padding:17px 20px;
      color:#67512c;
      background:#fff8e8;
      border:1px solid #f2dca7;
      border-radius:12px;
      font-size:13px;
    }
    .footer{
      padding:54px 0 20px;
      color:#cbd5e5;
      background:var(--dark);
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.4fr 1fr 1fr 1fr;
      gap:38px;
    }
    .footer h3,.footer-brand strong{
      margin:0 0 15px;
      color:#fff;
      font-size:16px;
    }
    .footer-brand strong{display:block;font-size:21px}
    .footer p{margin:6px 0;color:#9faabe;font-size:13px}
    .footer-links{display:grid;gap:8px}
    .footer-links a{color:#b9c4d5;font-size:13px}
    .footer-links a:hover{color:#fff}
    .footer-bottom{
      margin-top:36px;
      padding-top:20px;
      display:flex;
      justify-content:space-between;
      gap:20px;
      color:#8793a8;
      border-top:1px solid rgba(255,255,255,.11);
      font-size:12px;
    }
    @media (max-width:1080px){
      .main-nav{display:none}
      .hamburger{display:flex}
      .header-inner{min-height:68px}
      .logo{margin-right:auto}
      .video-detail-main .watch-grid{grid-template-columns:minmax(0,1fr)}
      .video-detail-main .side-panel{position:static}
      .video-detail-main .side-list{grid-template-columns:repeat(2,minmax(0,1fr))}
    }
    @media (max-width:760px){
      .container{width:min(100% - 28px,1180px)}
      .topbar .container{padding:7px 0;align-items:flex-start;flex-direction:column;gap:2px}
      .topbar-links{flex-wrap:wrap;gap:4px 14px}
      .logo span{max-width:150px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
      .member-link{display:none}
      .header-btns{gap:7px}
      .account-link{padding:8px 11px}
      .video-detail-main .video-heading{padding:34px 0 23px}
      .video-detail-main .watch-section{padding:25px 0 48px}
      .video-detail-main .player-frame{min-height:0;border-radius:12px}
      .video-detail-main .video-summary,
      .video-detail-main .video-content,
      .video-detail-main .related-section{padding:20px}
      .video-detail-main .side-list{grid-template-columns:1fr}
      .video-detail-main .related-grid{grid-template-columns:1fr}
      .video-detail-main .related-card{display:grid;grid-template-columns:130px minmax(0,1fr)}
      .video-detail-main .related-cover{height:100%;aspect-ratio:auto}
      .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
      .footer-bottom{align-items:flex-start;flex-direction:column}
    }
    @media (max-width:480px){
      .logo img{width:36px;height:36px}
      .account-link{display:none}
      .video-detail-main .video-meta{gap:7px}
      .video-detail-main .video-meta span{padding:5px 8px}
      .video-detail-main .related-card{display:block}
      .video-detail-main .related-cover{height:auto;aspect-ratio:16/9}
      .footer-grid{grid-template-columns:1fr}
    }