:root{
      --primary:#0B3D91;
      --primary-dark:#06275f;
      --primary-light:#eaf1ff;
      --ink:#14213d;
      --muted:#667085;
      --line:#dfe5ef;
      --surface:#fff;
      --soft:#f5f7fb;
      --accent:#20c77a;
      --radius:16px;
      --shadow:0 16px 42px rgba(11,61,145,.11);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:var(--soft);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{font:inherit}
    .container{width:min(1180px,calc(100% - 40px));margin-inline:auto}
    .topbar{color:#dbe8ff;background:#061a3d;font-size:13px}
    .topbar-inner{min-height:38px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar-contact{display:flex;gap:22px}
    .topbar a:hover{color:#fff}
    .header{position:relative;z-index:50;background:#fff;border-bottom:1px solid var(--line)}
    .header-inner{min-height:78px;display:flex;align-items:center;gap:24px}
    .logo{display:inline-flex;align-items:center;gap:10px;min-width:max-content;font-weight:800;color:var(--primary-dark)}
    .logo img{width:42px;height:42px;object-fit:contain;border-radius:9px}
    .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{display:flex;align-items:center;height:100%;padding:0 11px;font-size:14px;font-weight:700;white-space:nowrap}
    .nav-link:hover,.nav-item:focus-within>.nav-link{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:100%;left:0;z-index:70;visibility:hidden;opacity:0;transform:translateY(8px);transition:.2s ease;background:#fff;border:1px solid var(--line);border-radius:0 0 16px 16px;box-shadow:var(--shadow);pointer-events:none}
    .dropdown-panel{width:310px;padding:12px}
    .dropdown-panel>a:not(.dropdown-footer){display:block;padding:10px 12px;border-radius:9px;font-size:14px}
    .dropdown-panel>a:hover{color:var(--primary);background:var(--primary-light)}
    .dropdown-footer,.mega-footer{display:block;margin-top:10px;padding:11px 13px;color:#fff;background:var(--primary);border-radius:9px;text-align:center;font-weight:750}
    .mega-menu{left:50%;width:660px;padding:20px;transform:translate(-50%,8px)}
    .mega-wide{width:min(920px,90vw)}
    .nav-item:hover>.dropdown-panel,.nav-item:focus-within>.dropdown-panel{visibility:visible;opacity:1;transform:translateY(0);pointer-events:auto}
    .nav-item:hover>.mega-menu,.nav-item:focus-within>.mega-menu{visibility:visible;opacity:1;transform:translate(-50%,0);pointer-events:auto}
    .mega-title{margin:0 0 12px;font-weight:800;color:var(--primary-dark)}
    .mega-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
    .mega-card{display:flex;align-items:center;gap:10px;min-width:0;padding:10px;border:1px solid var(--line);border-radius:11px;background:#fff}
    .mega-card:hover{border-color:#9ab8ec;background:var(--primary-light)}
    .mega-card>img{width:48px;height:48px;flex:0 0 48px;object-fit:cover;border-radius:9px;background:var(--soft)}
    .mega-card>img.tool-icon{object-fit:contain;padding:5px}
    .mega-card-copy{display:flex;min-width:0;flex-direction:column}
    .mega-card-copy strong,.mega-card-copy span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
    .mega-card-copy strong{font-size:14px}
    .mega-card-copy span{color:var(--muted);font-size:12px}
    .mega-category-list{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
    .mega-category-list a{padding:6px 11px;color:var(--primary);background:var(--primary-light);border-radius:999px;font-size:13px;font-weight:700}
    .header-btns{display:flex;align-items:center;gap:10px}
    .header-btns>*{white-space:nowrap}
    .account-btn{padding:9px 14px;color:#fff;background:var(--primary);border-radius:9px;font-size:14px;font-weight:800}
    .hamburger{display:none;width:42px;height:42px;padding:9px;border:0;border-radius:9px;background:var(--primary-light);cursor:pointer}
    .hamburger span{display:block;width:22px;height:2px;margin:4px auto;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:90;visibility:hidden;opacity:0;background:rgba(3,14,35,.62);transition:.25s}
    .drawer-overlay.open{visibility:visible;opacity:1}
    .mobile-drawer{position:fixed;top:0;right:0;z-index:100;width:min(390px,92vw);height:100dvh;overflow-y:auto;background:#fff;transform:translateX(105%);transition:.28s ease;box-shadow:-20px 0 50px rgba(0,0,0,.2)}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{position:sticky;top:0;z-index:2;display:flex;align-items:center;gap:10px;padding:16px;background:#fff;border-bottom:1px solid var(--line)}
    .drawer-head>a{padding:8px 10px;color:#fff;background:var(--primary);border-radius:8px;font-size:13px;font-weight:700}
    .drawer-close{margin-left:auto;width:38px;height:38px;border:0;border-radius:9px;color:var(--primary);background:var(--primary-light);font-size:27px;line-height:1;cursor:pointer}
    .drawer-menu{padding:12px 16px 28px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 10px;border:0;border-bottom:1px solid var(--line);color:var(--ink);background:transparent;text-align:left;font-weight:750;cursor:pointer}
    .drawer-toggle{position:relative}
    .drawer-toggle::after{content:"+";position:absolute;right:12px;font-size:20px;font-weight:400}
    .drawer-toggle.active::after{content:"−"}
    .drawer-submenu{display:none;padding:7px 0 10px 15px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:8px 10px;color:var(--muted);border-radius:7px;font-size:14px}
    .drawer-submenu a:hover{color:var(--primary);background:var(--primary-light)}
    .video-page{min-height:65vh}
    .video-page .page-banner{position:relative;overflow:hidden;padding:72px 0 64px;color:#fff;background:linear-gradient(135deg,#04142f 0%,#0B3D91 58%,#1470c9 100%)}
    .video-page .page-banner::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 20% 15%,rgba(32,199,122,.28),transparent 28%),linear-gradient(120deg,transparent 55%,rgba(255,255,255,.08))}
    .video-page .banner-inner{position:relative;z-index:1;max-width:800px}
    .video-page .eyebrow{display:inline-flex;align-items:center;gap:8px;margin-bottom:13px;padding:6px 11px;border:1px solid rgba(255,255,255,.28);border-radius:999px;background:rgba(255,255,255,.09);font-size:13px;font-weight:750}
    .video-page .eyebrow::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 12px var(--accent)}
    .video-page h1{margin:0;font-size:clamp(34px,5vw,58px);line-height:1.15;letter-spacing:-.03em}
    .video-page .banner-copy{max-width:700px;margin:16px 0 0;color:#dce8ff;font-size:17px}
    .video-page .video-categories{position:relative;z-index:2;margin-top:-25px}
    .video-page .category-panel{display:flex;align-items:center;gap:10px;overflow-x:auto;padding:16px;background:#fff;border:1px solid var(--line);border-radius:15px;box-shadow:var(--shadow);scrollbar-width:thin}
    .video-page .category-panel>span{flex:0 0 auto;color:var(--muted);font-size:13px;font-weight:800}
    .video-page .category-panel a{flex:0 0 auto;padding:8px 14px;color:var(--primary-dark);background:var(--primary-light);border:1px solid transparent;border-radius:999px;font-size:14px;font-weight:750}
    .video-page .category-panel a:hover{color:#fff;background:var(--primary)}
    .video-page .video-content{padding:54px 0 76px}
    .video-page .section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:24px}
    .video-page .section-head h2{margin:0;font-size:30px;line-height:1.25}
    .video-page .section-head p{max-width:560px;margin:0;color:var(--muted)}
    .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(11,61,145,.06);transition:.25s}
    .video-page .video-card:hover{transform:translateY(-5px);border-color:#acc2e8;box-shadow:var(--shadow)}
    .video-page .video-cover{position:relative;display:block;overflow:hidden;aspect-ratio:16/9;background:#081d43}
    .video-page .video-cover img{width:100%;height:100%;object-fit:cover;transition:.35s}
    .video-page .video-card:hover .video-cover img{transform:scale(1.045)}
    .video-page .play-button{position:absolute;top:50%;left:50%;width:54px;height:54px;border:1px solid rgba(255,255,255,.45);border-radius:50%;background:rgba(11,61,145,.88);transform:translate(-50%,-50%);box-shadow:0 10px 30px rgba(0,0,0,.25)}
    .video-page .play-button::after{content:"";position:absolute;top:17px;left:21px;border-top:10px solid transparent;border-bottom:10px solid transparent;border-left:16px solid #fff}
    .video-page .duration{position:absolute;right:10px;bottom:10px;padding:3px 8px;color:#fff;background:rgba(0,0,0,.78);border-radius:6px;font-size:12px;font-weight:750}
    .video-page .video-card-body{padding:19px}
    .video-page .video-card-body h3{display:-webkit-box;overflow:hidden;min-height:52px;margin:0 0 9px;font-size:18px;line-height:1.45;-webkit-box-orient:vertical;-webkit-line-clamp:2}
    .video-page .video-card-body h3 a:hover{color:var(--primary)}
    .video-page .video-summary{display:-webkit-box;overflow:hidden;min-height:47px;margin:0 0 14px;color:var(--muted);font-size:14px;-webkit-box-orient:vertical;-webkit-line-clamp:2}
    .video-page .video-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:13px;border-top:1px solid var(--line);color:var(--muted);font-size:12px}
    .video-page .watch-link{color:var(--primary);font-weight:800}
    .video-page .pagination{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin-top:40px}
    .video-page .pagination a{display:inline-flex;align-items:center;justify-content:center;min-width:42px;height:42px;padding:0 13px;background:#fff;border:1px solid var(--line);border-radius:9px;font-weight:750}
    .video-page .pagination a:hover,.video-page .pagination a.active,.video-page .pagination a.current{color:#fff;background:var(--primary);border-color:var(--primary)}
    .video-page .research-note{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:48px}
    .video-page .note-card{padding:21px;background:#fff;border:1px solid var(--line);border-radius:14px}
    .video-page .note-card strong{display:block;margin-bottom:5px;color:var(--primary-dark)}
    .video-page .note-card p{margin:0;color:var(--muted);font-size:14px}
    .footer{padding-top:58px;color:#cbd8ed;background:#061a3d}
    .footer-grid{display:grid;grid-template-columns:1.35fr 1fr 1fr 1fr;gap:40px}
    .footer .logo{color:#fff}
    .footer-brand p{max-width:360px;color:#9fb0cb;font-size:14px}
    .footer h3{margin:0 0 15px;color:#fff;font-size:16px}
    .footer-links,.footer-contact{display:flex;flex-direction:column;gap:9px;font-size:14px}
    .footer a:hover{color:#fff}
    .footer-contact span{color:#9fb0cb}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:42px;padding:20px 0;border-top:1px solid rgba(255,255,255,.12);color:#8fa2c0;font-size:13px}
    @media (max-width:1100px){
      .main-nav{display:none}
      .hamburger{display:block}
      .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:720px){
      .container{width:min(100% - 28px,1180px)}
      .topbar-inner{padding:8px 0;align-items:flex-start;flex-direction:column;gap:3px}
      .topbar-contact{flex-wrap:wrap;gap:4px 15px}
      .header-inner{min-height:68px;gap:10px}
      .header .logo span{display:none}
      .header-btns{gap:7px}
      .account-btn{padding:8px 10px;font-size:12px}
      .video-page .page-banner{padding:53px 0 55px}
      .video-page .banner-copy{font-size:15px}
      .video-page .video-content{padding:42px 0 60px}
      .video-page .section-head{align-items:flex-start;flex-direction:column;gap:8px}
      .video-page .section-head h2{font-size:25px}
      .video-page .video-grid{grid-template-columns:1fr}
      .video-page .research-note{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr;gap:28px}
      .footer-bottom{flex-direction:column}
    }