:root{
      --primary:#0B3D91;
      --primary-dark:#082d6d;
      --ink:#172033;
      --muted:#68758a;
      --line:#e5eaf1;
      --soft:#f5f8fc;
      --white:#fff;
      --shadow:0 18px 50px rgba(20,45,88,.10);
      --radius:16px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#fff;font-family:"Noto Sans HK","PingFang HK","Microsoft JhengHei",sans-serif;line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button{font:inherit}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}

    .topbar{background:#10213e;color:#dce7f7;font-size:13px}
    .topbar .container{min-height:38px;display:flex;align-items:center;justify-content:space-between;gap:18px}
    .topbar-links{display:flex;gap:20px}
    .topbar a{color:#f0f5fd;opacity:.92}
    .topbar a:hover{color:#fff;text-decoration:underline}

    .header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);backdrop-filter:blur(14px)}
    .header-inner{min-height:76px;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:10px;flex:0 0 auto;font-weight:800;color:var(--primary);font-size:18px}
    .logo img{width:36px;height:36px;object-fit:contain;border-radius:8px}
    .main-nav{margin-left:auto}
    .nav-list{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;gap:5px;padding:25px 12px;color:#27344b;font-size:14px;font-weight:650;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--primary)}
    .has-arrow:after{content:"";width:6px;height:6px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg) translateY(-2px)}
    .dropdown-panel,.mega-menu{position:absolute;top:calc(100% + 1px);left:50%;transform:translateX(-50%) translateY(8px);width:300px;padding:20px;background:#fff;border:1px solid var(--line);border-radius:0 0 14px 14px;box-shadow:var(--shadow);opacity:0;visibility:hidden;pointer-events:none;transition:.2s ease;z-index:50}
    .mega-menu{width:620px}
    .nav-item:after{content:"";position:absolute;left:0;right:0;top:100%;height:12px}
    .nav-item:hover .dropdown-panel,.nav-item:focus-within .dropdown-panel,.nav-item:hover .mega-menu,.nav-item:focus-within .mega-menu{opacity:1;visibility:visible;pointer-events:auto;transform:translateX(-50%) translateY(0)}
    .panel-title{margin:0 0 14px;color:var(--primary);font-size:15px;font-weight:800}
    .panel-list{display:grid;gap:8px}
    .panel-list a{padding:7px 0;color:#405069;font-size:13px;border-bottom:1px solid #f0f2f6}
    .panel-list a:hover{color:var(--primary)}
    .mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
    .mega-card{display:block;padding:10px;border:1px solid var(--line);border-radius:10px;background:#fbfcfe;transition:.2s}
    .mega-card:hover{border-color:#9db6dc;transform:translateY(-2px)}
    .mega-card img{width:34px;height:34px;object-fit:contain;margin-bottom:7px;border-radius:7px}
    .mega-card strong{display:block;font-size:12px;line-height:1.4;margin-bottom:4px}
    .mega-card small{display:block;color:var(--muted);font-size:10px;line-height:1.45;margin-top:3px}
    .mega-footer{display:inline-block;margin-top:16px;color:var(--primary);font-size:13px;font-weight:700}
    .header-btns{display:flex;align-items:center;gap:8px;margin-left:8px}
    .member-btn,.open-btn{padding:9px 13px;border-radius:8px;font-size:13px;font-weight:700;white-space:nowrap}
    .member-btn{color:var(--primary);border:1px solid #b8cae3}
    .open-btn{color:#fff;background:var(--primary)}
    .member-btn:hover{background:#f0f5fc}
    .open-btn:hover{background:var(--primary-dark)}
    .hamburger{display:none;border:0;background:transparent;padding:8px;cursor:pointer}
    .hamburger span{display:block;width:23px;height:2px;margin:5px 0;background:var(--ink);transition:.2s}
    .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;background:rgba(9,22,44,.48);opacity:0;visibility:hidden;transition:.25s;z-index:80}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;top:0;right:0;width:min(390px,88vw);height:100vh;background:#fff;transform:translateX(100%);transition:.28s ease;z-index:90;overflow-y:auto;box-shadow:-12px 0 35px rgba(0,0,0,.16)}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:12px;padding:20px;border-bottom:1px solid var(--line);font-weight:800;color:var(--primary)}
    .drawer-head>a{margin-left:auto;padding:7px 12px;border-radius:7px;background:var(--primary);color:#fff;font-size:13px}
    .drawer-close{border:0;background:transparent;font-size:28px;line-height:1;color:#6f7a8b;cursor:pointer}
    .drawer-menu{padding:12px 20px 35px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:14px 0;border:0;border-bottom:1px solid var(--line);background:none;text-align:left;color:var(--ink);font-weight:700;cursor:pointer}
    .drawer-toggle:after{content:"+";float:right;color:var(--primary);font-size:20px;font-weight:400}
    .drawer-toggle.active:after{content:"−"}
    .drawer-submenu{display:grid;gap:0;max-height:0;overflow:hidden;transition:max-height .25s ease;background:#f7f9fc}
    .drawer-submenu.open{max-height:600px}
    .drawer-submenu a{padding:10px 14px;border-bottom:1px solid #e9edf4;color:#59677d;font-size:13px}

    .video-page{padding:72px 0 95px;background:linear-gradient(180deg,#f5f8fc 0,#fff 55%)}
    .video-page .page-heading{text-align:center;max-width:760px;margin:0 auto 42px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--primary);font-size:13px;font-weight:800;letter-spacing:.08em}
    .eyebrow:before{content:"";width:28px;height:2px;background:var(--primary)}
    .video-page h1{margin:12px 0 12px;font-size:clamp(30px,4vw,48px);line-height:1.2;letter-spacing:-.03em}
    .video-page .intro{margin:0;color:var(--muted);font-size:16px}
    .category-bar{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin:0 auto 34px}
    .category-bar a{padding:8px 16px;border:1px solid #cbd7e8;border-radius:999px;background:#fff;color:#52627a;font-size:13px;transition:.2s}
    .category-bar a:hover,.category-bar a.active{border-color:var(--primary);background:var(--primary);color:#fff}
    .video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
    .video-card{overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 8px 25px rgba(31,57,94,.06);transition:.25s}
    .video-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#b7c9e3}
    .video-cover{position:relative;aspect-ratio:16/9;background:#dfe7f2;overflow:hidden}
    .video-cover img{width:100%;height:100%;object-fit:cover;transition:.35s}
    .video-card:hover .video-cover img{transform:scale(1.04)}
    .play-badge{position:absolute;left:16px;bottom:14px;width:40px;height:40px;display:grid;place-items:center;border-radius:50%;background:rgba(11,61,145,.94);color:#fff;font-size:16px;box-shadow:0 6px 14px rgba(4,27,72,.3)}
    .duration{position:absolute;right:12px;bottom:12px;padding:3px 7px;border-radius:5px;background:rgba(8,20,40,.78);color:#fff;font-size:11px}
    .video-body{padding:19px 20px 20px}
    .video-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;color:#78869a;font-size:12px}
    .video-category{color:var(--primary);font-weight:800}
    .video-body h2{margin:9px 0 8px;font-size:18px;line-height:1.45}
    .video-body h2 a:hover{color:var(--primary)}
    .video-summary{margin:0;color:var(--muted);font-size:13px;line-height:1.75;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
    .video-link{display:inline-flex;margin-top:14px;color:var(--primary);font-size:13px;font-weight:800}
    .pagination{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;margin-top:48px}
    .pagination a{min-width:38px;padding:7px 12px;text-align:center;border:1px solid var(--line);border-radius:8px;color:#5d6c82;background:#fff;font-size:13px}
    .pagination a:hover,.pagination a.current,.pagination a.active{background:var(--primary);border-color:var(--primary);color:#fff}

    .footer{background:#0d1a30;color:#dbe5f3;padding:58px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:38px}
    .footer-brand strong{display:block;color:#fff;font-size:20px;margin-bottom:12px}
    .footer p{margin:0 0 13px;color:#aebdd1;font-size:13px;line-height:1.8}
    .footer h3{margin:0 0 14px;color:#fff;font-size:15px}
    .footer-grid>div:not(.footer-brand) a{display:block;margin:7px 0;color:#afbdd0;font-size:13px}
    .footer-grid a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:40px;padding-top:19px;border-top:1px solid rgba(255,255,255,.12);color:#8e9db3;font-size:12px}

    @media (max-width:1000px){
      .main-nav{display:none}
      .hamburger{display:block}
      .header-btns{margin-left:auto}
      .mega-grid{grid-template-columns:repeat(2,1fr)}
      .video-grid{grid-template-columns:repeat(2,1fr)}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width:640px){
      .container{width:min(100% - 28px,1180px)}
      .topbar .container{padding:8px 0;align-items:flex-start;flex-direction:column;gap:2px}
      .topbar-links{gap:12px;flex-wrap:wrap}
      .header-inner{min-height:66px;gap:8px}
      .logo{font-size:16px}
      .logo img{width:31px;height:31px}
      .member-btn{display:none}
      .open-btn{padding:8px 10px;font-size:12px}
      .video-page{padding:48px 0 65px}
      .video-page .page-heading{margin-bottom:30px}
      .video-page h1{font-size:32px}
      .video-page .intro{font-size:14px}
      .category-bar{justify-content:flex-start;overflow-x:auto;flex-wrap:nowrap;padding-bottom:4px}
      .category-bar a{white-space:nowrap}
      .video-grid{grid-template-columns:1fr;gap:18px}
      .footer-grid{grid-template-columns:1fr;gap:25px}
      .footer-bottom{flex-direction:column;gap:5px;margin-top:28px}
    }