:root{
      --primary:#0B3D91;
      --primary-dark:#072b67;
      --primary-soft:#eaf1ff;
      --ink:#151923;
      --muted:#647084;
      --line:#dfe5ef;
      --surface:#fff;
      --background:#f5f7fb;
      --radius:18px;
      --shadow:0 18px 50px rgba(16,31,59,.10);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:var(--background);font-family:"Noto Sans TC","PingFang HK","Microsoft JhengHei",sans-serif;line-height:1.65}
    body,button,input{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{color:#dce7ff;background:#07172f;font-size:13px}
    .topbar-inner{min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar-contact{display:flex;align-items:center;gap:20px}
    .topbar a:hover{color:#fff}
    .header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);border-bottom:1px solid rgba(223,229,239,.9);backdrop-filter:blur(16px)}
    .header-inner{min-height:78px;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:11px;min-width:max-content;font-weight:800;color:var(--primary);font-size:19px}
    .logo img{width:42px;height:42px;object-fit:contain}
    .main-nav{margin-left:auto;height:78px}
    .nav-list{height:100%;display:flex;align-items:center;gap:2px;margin:0;padding:0;list-style:none}
    .nav-item{position:relative;height:100%;display:flex;align-items:center}
    .nav-link{height:100%;display:flex;align-items:center;padding:0 12px;font-size:15px;font-weight:700;white-space:nowrap}
    .nav-link:hover{color:var(--primary)}
    .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:calc(100% - 2px);left:50%;visibility:hidden;opacity:0;transform:translate(-50%,10px);transition:.2s ease;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow)}
    .dropdown-panel{width:310px;padding:12px}
    .mega-menu{width:min(680px,90vw);padding:22px}
    .nav-item:hover .dropdown-panel,.nav-item:hover .mega-menu{visibility:visible;opacity:1;transform:translate(-50%,0)}
    .nav-item:nth-last-child(-n+3) .mega-menu{left:auto;right:0;transform:translate(0,10px)}
    .nav-item:nth-last-child(-n+3):hover .mega-menu{transform:translate(0,0)}
    .dropdown-list{display:grid}
    .dropdown-list a,.mega-links a{padding:10px 12px;border-radius:9px;font-size:14px}
    .dropdown-list a:hover,.mega-links a:hover{color:var(--primary);background:var(--primary-soft)}
    .mega-heading{margin:0 0 12px;font-size:15px;color:var(--primary)}
    .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:11px;padding:10px;border:1px solid var(--line);border-radius:12px}
    .mega-card:hover{border-color:#a8c0e9;background:#f8faff}
    .mega-card img{width:46px;height:46px;flex:0 0 auto;object-fit:cover;border-radius:9px;background:#eef2f8}
    .mega-card>span{min-width:0;display:grid}
    .mega-card strong,.mega-card span span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
    .mega-card strong{font-size:14px}
    .mega-card span span{color:var(--muted);font-size:12px}
    .mega-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:4px}
    .mega-footer{display:block;margin-top:14px;padding-top:13px;border-top:1px solid var(--line);color:var(--primary);font-size:14px;font-weight:800}
    .header-btns{display:flex;align-items:center;gap:10px}
    .member-btn{display:inline-flex;align-items:center}
    .open-btn{padding:9px 16px;color:#fff;background:var(--primary);border-radius:10px;font-weight:800;white-space:nowrap}
    .open-btn:hover{background:var(--primary-dark)}
    .hamburger{display:none;width:42px;height:42px;padding:10px;border:0;border-radius:10px;background:var(--primary-soft);cursor:pointer}
    .hamburger span{display:block;width:22px;height:2px;margin:4px 0;background:var(--primary);transition:.2s}
    .hamburger.active span:nth-child(1){transform:translateY(6px) rotate(45deg)}
    .hamburger.active span:nth-child(2){opacity:0}
    .hamburger.active span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
    .drawer-overlay{position:fixed;inset:0;z-index:150;visibility:hidden;opacity:0;background:rgba(4,12,27,.55);transition:.25s}
    .drawer-overlay.open{visibility:visible;opacity:1}
    .mobile-drawer{position:fixed;top:0;right:0;z-index:160;width:min(390px,90vw);height:100vh;overflow-y:auto;background:#fff;transform:translateX(105%);transition:.3s ease;box-shadow:-20px 0 60px rgba(0,0,0,.18)}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:10px;padding:18px;border-bottom:1px solid var(--line);font-weight:700}
    .drawer-head>span{min-width:0;margin-right:auto}
    .drawer-head>a{padding:7px 13px;color:#fff;background:var(--primary);border-radius:8px}
    .drawer-close{width:36px;height:36px;padding:0;border:0;background:#edf1f7;border-radius:50%;font-size:24px;cursor:pointer}
    .drawer-menu{padding:12px 18px 30px}
    .drawer-link,.drawer-toggle{width:100%;display:flex;align-items:center;padding:13px 4px;border:0;border-bottom:1px solid var(--line);background:none;text-align:left;font-weight:800;cursor:pointer}
    .drawer-toggle:after{content:"+";margin-left:auto;color:var(--primary);font-size:20px}
    .drawer-toggle.active:after{content:"−"}
    .drawer-submenu{display:none;padding:7px 0 7px 13px;border-left:2px solid var(--primary-soft)}
    .drawer-submenu.open{display:grid}
    .drawer-submenu a{padding:8px 10px;color:var(--muted);font-size:14px;border-radius:8px}
    .drawer-submenu a:hover{color:var(--primary);background:var(--primary-soft)}
    .video-page{min-width:0}
    .video-page .video-intro{position:relative;overflow:hidden;padding:76px 0 64px;color:#fff;background:linear-gradient(130deg,#07172f 0%,var(--primary) 58%,#4a206d 100%)}
    .video-page .video-intro:before,.video-page .video-intro:after{content:"";position:absolute;border-radius:50%;filter:blur(4px);pointer-events:none}
    .video-page .video-intro:before{width:380px;height:380px;top:-230px;right:6%;background:rgba(255,255,255,.13)}
    .video-page .video-intro:after{width:270px;height:270px;left:-80px;bottom:-180px;background:rgba(143,95,213,.36)}
    .video-page .intro-inner{position:relative;z-index:1;max-width:800px}
    .video-page .eyebrow{display:inline-flex;align-items:center;gap:8px;margin-bottom:14px;padding:6px 12px;border:1px solid rgba(255,255,255,.3);border-radius:999px;background:rgba(255,255,255,.1);font-size:13px;font-weight:800}
    .video-page .video-intro h1{margin:0 0 15px;font-size:clamp(36px,6vw,64px);line-height:1.08;letter-spacing:-.03em}
    .video-page .video-intro p{max-width:680px;margin:0;color:#dbe7ff;font-size:17px}
    .video-page .category-strip{position:relative;z-index:2;margin-top:-25px}
    .video-page .category-panel{display:flex;align-items:center;gap:12px;padding:16px;background:rgba(255,255,255,.98);border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);overflow-x:auto}
    .video-page .category-label{flex:0 0 auto;padding:9px 12px;color:var(--primary);font-weight:900}
    .video-page .category-panel a{flex:0 0 auto;padding:9px 14px;border-radius:999px;background:#f0f3f8;color:#445069;font-size:14px;font-weight:700}
    .video-page .category-panel a:hover{color:#fff;background:var(--primary)}
    .video-page .video-library{padding:65px 0 82px}
    .video-page .section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:26px}
    .video-page .section-head h2{margin:0;font-size:clamp(27px,4vw,40px);line-height:1.2}
    .video-page .section-head p{max-width:590px;margin:7px 0 0;color:var(--muted)}
    .video-page .library-count{flex:0 0 auto;padding:8px 12px;color:var(--primary);background:var(--primary-soft);border-radius:999px;font-size:13px;font-weight:800}
    .video-page .video-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
    .video-page .video-card{min-width:0;overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 8px 24px rgba(16,31,59,.06);transition:.25s}
    .video-page .video-card:hover{transform:translateY(-5px);border-color:#a9bfe5;box-shadow:var(--shadow)}
    .video-page .video-cover{position:relative;aspect-ratio:16/9;overflow:hidden;background:#dce4f1}
    .video-page .video-cover img{width:100%;height:100%;object-fit:cover;transition:.4s}
    .video-page .video-card:hover .video-cover img{transform:scale(1.045)}
    .video-page .play-mark{position:absolute;inset:50% auto auto 50%;width:54px;height:54px;display:grid;place-items:center;transform:translate(-50%,-50%);color:#fff;background:rgba(11,61,145,.88);border:4px solid rgba(255,255,255,.72);border-radius:50%;box-shadow:0 8px 24px rgba(0,0,0,.25)}
    .video-page .play-mark:after{content:"";margin-left:4px;border-top:8px solid transparent;border-bottom:8px solid transparent;border-left:12px solid currentColor}
    .video-page .video-duration{position:absolute;right:10px;bottom:10px;padding:4px 8px;color:#fff;background:rgba(7,16,32,.84);border-radius:6px;font-size:12px;font-weight:800}
    .video-page .video-body{padding:19px}
    .video-page .video-category{display:inline-block;margin-bottom:8px;color:var(--primary);font-size:12px;font-weight:900;letter-spacing:.05em}
    .video-page .video-body h3{margin:0 0 9px;font-size:19px;line-height:1.4}
    .video-page .video-body p{display:-webkit-box;min-height:3.25em;margin:0 0 17px;overflow:hidden;color:var(--muted);font-size:14px;-webkit-box-orient:vertical;-webkit-line-clamp:2}
    .video-page .video-link{display:inline-flex;align-items:center;gap:8px;color:var(--primary);font-size:14px;font-weight:900}
    .video-page .video-link:after{content:"→";transition:.2s}
    .video-page .video-link:hover:after{transform:translateX(4px)}
    .video-page .pagination{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin-top:42px}
    .video-page .pagination a{min-width:42px;height:42px;display:grid;place-items:center;padding:0 12px;border:1px solid var(--line);border-radius:10px;background:#fff;color:#445069;font-weight:800}
    .video-page .pagination a:hover,.video-page .pagination a.active,.video-page .pagination a.current{color:#fff;border-color:var(--primary);background:var(--primary)}
    .video-page .video-note{margin-top:54px;padding:28px 30px;border:1px solid #cbd9f0;border-radius:var(--radius);background:linear-gradient(120deg,#edf4ff,#fff)}
    .video-page .video-note h2{margin:0 0 7px;font-size:23px}
    .video-page .video-note p{margin:0;color:var(--muted)}
    .footer{padding:60px 0 22px;color:#c5d0e2;background:#07172f}
    .footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:38px}
    .footer h3,.footer strong{color:#fff}
    .footer h3{margin:0 0 16px;font-size:16px}
    .footer p{color:#9eacc2;font-size:14px}
    .footer-grid>div:not(.footer-brand){display:flex;flex-direction:column;align-items:flex-start}
    .footer a,.footer-grid span{display:inline-block;margin:0 0 9px;color:#aebbd0;font-size:14px}
    .footer a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:42px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);color:#8e9cb2;font-size:13px}
    @media(max-width:1080px){
      .main-nav{display:none}
      .hamburger{display:block}
      .header-inner{min-height:70px}
      .header-btns{margin-left:auto}
      .video-page .video-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
      .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
    }
    @media(max-width:700px){
      .container{width:min(100% - 28px,1180px)}
      .topbar-inner{justify-content:center;text-align:center}
      .topbar-contact{display:none}
      .member-btn{display:none}
      .open-btn{padding:8px 12px}
      .logo span{max-width:150px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
      .video-page .video-intro{padding:56px 0 52px}
      .video-page .video-intro p{font-size:15px}
      .video-page .category-panel{padding:11px}
      .video-page .video-library{padding:52px 0 65px}
      .video-page .section-head{align-items:flex-start;flex-direction:column}
      .video-page .video-grid{grid-template-columns:1fr}
      .video-page .video-note{padding:22px}
      .footer{padding-top:45px}
      .footer-grid{grid-template-columns:1fr;gap:27px}
      .footer-bottom{flex-direction:column}
    }