:root{
      --primary:#0B3D91;
      --primary-dark:#082d6a;
      --ink:#172033;
      --muted:#64748b;
      --line:#e5eaf2;
      --soft:#f5f7fb;
      --white:#fff;
      --radius:16px;
      --shadow:0 14px 40px rgba(15,35,75,.09)
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#f8fafc;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans TC","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:auto}
    .topbar{background:#101827;color:#d8e2f1;font-size:13px}
    .topbar-inner{min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:18px}
    .topbar-links{display:flex;gap:20px}
    .topbar a{color:#e7eef9}
    .header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(14px)}
    .header-inner{height:76px;display:flex;align-items:center;gap:26px}
    .logo{display:inline-flex;align-items:center;gap:10px;min-width:max-content;font-weight:800;color:var(--ink)}
    .logo img{width:38px;height:38px;object-fit:contain;border-radius:10px}
    .logo span{font-size:18px}
    .main-nav{flex:1}
    .nav-list{list-style:none;margin:0;padding:0;display:flex;align-items:stretch;justify-content:center;gap:4px}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;gap:5px;padding:25px 13px;font-size:14px;font-weight:650;white-space:nowrap}
    .nav-link:hover{color:var(--primary)}
    .has-arrow:after{content:"⌄";font-size:12px;color:#8090a7}
    .dropdown-panel,.mega-menu{position:absolute;top:calc(100% + 1px);left:50%;transform:translateX(-50%);width:290px;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;z-index:60}
    .mega-menu{width:570px}
    .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}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;left:0;right:0;top:-12px;height:12px}
    .mega-title{margin:0 0 12px;color:var(--primary);font-weight:800;font-size:14px}
    .dropdown-list{display:grid;gap:8px}
    .dropdown-list a{display:block;padding:7px 8px;border-radius:8px;font-size:14px}
    .dropdown-list a:hover{background:var(--soft);color:var(--primary)}
    .mega-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
    .mega-card{display:flex;gap:10px;min-width:0;padding:10px;border:1px solid var(--line);border-radius:11px;background:#fff}
    .mega-card:hover{border-color:#a9bde1;background:#f7faff}
    .mega-card img{width:38px;height:38px;object-fit:cover;border-radius:8px;background:#edf2f8;flex:0 0 auto}
    .mega-card span{min-width:0;display:grid;gap:2px}
    .mega-card strong,.mega-card small{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
    .mega-card strong{font-size:13px}
    .mega-card small{font-size:11px;color:var(--muted)}
    .mega-footer{display:block;margin-top:15px;padding-top:13px;border-top:1px solid var(--line);color:var(--primary);font-weight:700;font-size:13px}
    .header-btns{display:flex;align-items:center;gap:12px;white-space:nowrap}
    .member-link{font-size:13px;color:var(--primary);font-weight:700}
    .open-account{padding:9px 15px;border-radius:9px;background:var(--primary);color:#fff;font-size:13px;font-weight:700}
    .open-account:hover{background:var(--primary-dark)}
    .hamburger{display:none;width:42px;height:40px;border:1px solid var(--line);border-radius:9px;background:#fff;cursor:pointer;padding:9px}
    .hamburger span{display:block;height:2px;margin:4px 0;background:var(--ink);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;background:rgba(7,16,35,.5);opacity:0;visibility:hidden;transition:.25s;z-index:90}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;right:0;top:0;bottom:0;width:min(390px,88vw);background:#fff;transform:translateX(100%);transition:.25s;z-index:100;overflow-y:auto}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{height:76px;display:flex;align-items:center;gap:12px;padding:0 20px;border-bottom:1px solid var(--line);font-weight:800}
    .drawer-head>a{margin-left:auto;color:var(--primary);font-size:14px}
    .drawer-close{border:0;background:transparent;font-size:28px;line-height:1;cursor:pointer;color:var(--muted)}
    .drawer-menu{padding:15px 20px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 0;border:0;border-bottom:1px solid var(--line);background:transparent;text-align:left;font-weight:700;color:var(--ink);cursor:pointer}
    .drawer-toggle:after{content:"＋";float:right;color:var(--muted)}
    .drawer-toggle.active:after{content:"－"}
    .drawer-submenu{display:none;padding:6px 0 8px 14px;border-bottom:1px solid var(--line)}
    .drawer-submenu.open{display:grid}
    .drawer-submenu a{padding:7px 0;color:var(--muted);font-size:14px}
    .footer{margin-top:70px;padding:54px 0 20px;background:#111a2b;color:#c6d0df}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:38px}
    .footer .logo{color:#fff}
    .footer .logo img{background:#fff}
    .footer-brand p{max-width:330px;margin:18px 0 0;color:#9eacc1;font-size:14px}
    .footer h3{margin:0 0 14px;color:#fff;font-size:15px}
    .footer-links{list-style:none;margin:0;padding:0;display:grid;gap:8px}
    .footer-links a,.footer-col p{color:#9eacc1;font-size:14px}
    .footer-links a:hover{color:#fff}
    .footer-col p{margin:4px 0}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:42px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);font-size:12px;color:#8492a8}
    .product-page{padding:54px 0 0}
    .breadcrumb{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px;color:var(--muted);font-size:13px}
    .breadcrumb a{color:var(--primary)}
    .product-layout{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:30px;align-items:start}
    .product-main,.product-aside{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
    .product-main{padding:34px}
    .product-heading{display:grid;grid-template-columns:190px minmax(0,1fr);gap:25px;align-items:center;padding-bottom:27px;border-bottom:1px solid var(--line)}
    .product-cover{height:170px;border-radius:14px;background:#eef3fa;object-fit:cover;width:100%}
    .product-kicker{display:inline-block;margin-bottom:8px;color:var(--primary);font-size:13px;font-weight:800}
    .product-title{margin:0 0 10px;font-size:clamp(28px,4vw,42px);line-height:1.2;letter-spacing:-.03em}
    .product-summary{margin:0;color:var(--muted);font-size:16px}
    .product-meta{display:flex;flex-wrap:wrap;gap:10px 18px;margin-top:17px;color:var(--muted);font-size:13px}
    .product-meta strong{color:var(--ink)}
    .product-body{min-width:0;max-width:100%;overflow-x:auto;padding-top:30px;color:#354155}
    .product-body h2,.product-body h3{color:var(--ink);line-height:1.35}
    .product-body img{max-width:100%;height:auto}
    .product-body table{max-width:100%;display:block;overflow-x:auto;border-collapse:collapse}
    .product-body table td,.product-body table th{padding:9px 12px;border:1px solid var(--line);white-space:nowrap}
    .product-aside{padding:24px;position:sticky;top:105px}
    .aside-title{margin:0 0 18px;font-size:18px}
    .aside-card{display:grid;grid-template-columns:62px 1fr;gap:12px;padding:13px 0;border-top:1px solid var(--line)}
    .aside-card:first-of-type{border-top:0;padding-top:0}
    .aside-card img{width:62px;height:62px;object-fit:cover;border-radius:10px;background:#eef3fa}
    .aside-card h3{margin:0 0 3px;font-size:14px;line-height:1.4}
    .aside-card p{margin:0;color:var(--muted);font-size:12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
    .product-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
    .product-actions a{display:inline-block;padding:10px 17px;border-radius:9px;background:var(--primary);color:#fff;font-size:14px;font-weight:700}
    .product-actions a.secondary{background:#edf3fc;color:var(--primary)}
    @media(max-width:980px){
      .main-nav{display:none}
      .hamburger{display:block}
      .product-layout{grid-template-columns:1fr}
      .product-aside{position:static}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:640px){
      .container{width:min(100% - 28px,1180px)}
      .topbar-inner{padding:8px 0;align-items:flex-start;flex-direction:column;gap:2px}
      .topbar-links{gap:12px;flex-wrap:wrap}
      .header-inner{height:66px;gap:10px}
      .header-btns{margin-left:auto;gap:7px}
      .member-link{display:none}
      .open-account{padding:8px 11px}
      .product-page{padding-top:30px}
      .product-main{padding:22px}
      .product-heading{grid-template-columns:1fr;gap:18px}
      .product-cover{height:190px}
      .product-title{font-size:30px}
      .footer{margin-top:45px;padding-top:38px}
      .footer-grid{grid-template-columns:1fr;gap:25px}
      .footer-bottom{display:grid;gap:8px}
    }