:root{--theme:#0B3D91;--ink:#14213d;--muted:#667085;--line:#e7ebf1;--soft:#f5f8fc;--white:#fff}
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#f7f9fc;font-family:-apple-system,BlinkMacSystemFont,"Noto Sans TC","PingFang TC","Microsoft JhengHei",Arial,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:#101a2c;color:#dce5f2;font-size:13px}
    .topbar .container{min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar-links{display:flex;gap:20px}
    .topbar a:hover{color:#fff}
    .header{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
    .header-inner{height:76px;display:flex;align-items:center;gap:30px}
    .logo{display:flex;align-items:center;gap:10px;min-width:190px;font-weight:800;font-size:19px;color:var(--ink)}
    .logo img{width:38px;height:38px;object-fit:contain}
    .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:block;padding:24px 13px;font-size:14px;font-weight:700;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--theme)}
    .has-arrow:after{content:"⌄";font-size:12px;margin-left:6px}
    .dropdown-panel,.mega-menu{position:absolute;top:calc(100% - 1px);left:50%;transform:translateX(-50%) translateY(8px);width:330px;padding:20px;background:#fff;border:1px solid var(--line);border-radius:0 0 14px 14px;box-shadow:0 18px 42px #10264c1c;opacity:0;visibility:hidden;transition:.2s;z-index:30}
    .mega-menu{width:620px}
    .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;transform:translateX(-50%) translateY(0)}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;left:0;right:0;top:-12px;height:12px}
    .panel-title{margin:0 0 12px;color:var(--theme);font-size:13px;font-weight:800}
    .panel-list{display:grid;gap:8px}
    .panel-list a{padding:7px 0;border-bottom:1px solid var(--line);font-size:14px}
    .panel-list a:hover,.mega-card:hover strong{color:var(--theme)}
    .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:9px;background:#fbfcfe}
    .mega-card img{width:34px;height:34px;object-fit:contain;margin-bottom:7px}
    .mega-card strong,.mega-card small{display:block}
    .mega-card strong{font-size:13px;line-height:1.35}
    .mega-card small{margin-top:4px;color:var(--muted);font-size:11px;line-height:1.45}
    .mega-footer{display:block;margin-top:15px;padding-top:12px;border-top:1px solid var(--line);color:var(--theme);font-size:13px;font-weight:800}
    .header-btns{display:flex;align-items:center;gap:9px}
    .member-btn,.open-btn{border-radius:7px;padding:8px 13px;font-size:13px;font-weight:700}
    .member-btn{color:var(--theme);border:1px solid #cbd8eb}
    .open-btn{background:var(--theme);color:#fff}
    .hamburger{display:none;border:0;background:transparent;padding:8px;cursor:pointer}
    .hamburger span{display:block;width:23px;height:2px;background:var(--ink);margin:5px 0;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{display:none}
    .mobile-drawer{display:none}
    .tool-detail-page{padding:54px 0 80px}
    .breadcrumbs{margin-bottom:20px;color:var(--muted);font-size:13px}
    .breadcrumbs a{color:var(--theme)}
    .tool-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:28px;align-items:start}
    .tool-article,.tool-sidebar{background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:0 12px 30px #14213d0a}
    .tool-article{padding:34px}
    .tool-heading{display:flex;gap:20px;align-items:flex-start;padding-bottom:24px;border-bottom:1px solid var(--line)}
    .tool-heading img{width:76px;height:76px;object-fit:contain;border-radius:16px;background:var(--soft);padding:12px}
    .eyebrow{margin:0 0 5px;color:var(--theme);font-size:13px;font-weight:800}
    .tool-heading h1{margin:0;font-size:clamp(28px,4vw,42px);line-height:1.25;letter-spacing:-.03em}
    .tool-meta{display:flex;flex-wrap:wrap;gap:10px 18px;margin-top:12px;color:var(--muted);font-size:13px}
    .tool-intro{margin:25px 0;padding:18px 20px;background:#f2f6fb;border-left:4px solid var(--theme);border-radius:8px;color:#334155}
    .tool-body{min-width:0;max-width:100%;overflow-x:auto;padding-top:8px}
    .tool-body img,.tool-body table{max-width:100%}
    .tool-body h2,.tool-body h3{margin:28px 0 10px;color:var(--ink)}
    .tool-body p{margin:0 0 16px}
    .tool-body ul,.tool-body ol{padding-left:24px}
    .tool-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;padding-top:22px;border-top:1px solid var(--line)}
    .primary-action,.secondary-action{display:inline-flex;align-items:center;justify-content:center;border-radius:8px;padding:11px 18px;font-weight:700;font-size:14px}
    .primary-action{background:var(--theme);color:#fff}
    .secondary-action{border:1px solid #cbd8eb;color:var(--theme)}
    .tool-sidebar{padding:22px;position:sticky;top:20px}
    .tool-sidebar h2{margin:0 0 16px;font-size:19px}
    .related-tool{display:grid;grid-template-columns:48px 1fr;gap:11px;padding:13px 0;border-bottom:1px solid var(--line)}
    .related-tool:last-child{border-bottom:0}
    .related-tool img{width:48px;height:48px;padding:7px;background:var(--soft);border-radius:10px;object-fit:contain}
    .related-tool strong{display:block;font-size:14px;line-height:1.35}
    .related-tool p{margin:4px 0 0;color:var(--muted);font-size:12px;line-height:1.45}
    .footer{background:#101a2c;color:#cbd5e1;padding:48px 0 20px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:34px}
    .footer-brand strong{display:block;color:#fff;font-size:20px;margin-bottom:12px}
    .footer p{font-size:13px;margin:8px 0}
    .footer h3{margin:0 0 13px;color:#fff;font-size:15px}
    .footer-grid>div:not(.footer-brand) a{display:block;margin:6px 0;font-size:13px;color:#cbd5e1}
    .footer a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:32px;padding-top:18px;border-top:1px solid #ffffff1a;font-size:12px;color:#94a3b8}
    @media(max-width:1050px){
      .main-nav{display:none}
      .hamburger{display:block}
      .member-btn{display:none}
      .mobile-drawer{display:block;position:fixed;z-index:50;top:0;right:0;width:min(380px,88vw);height:100vh;background:#fff;transform:translateX(100%);transition:.25s;overflow:auto;box-shadow:-12px 0 35px #0002}
      .mobile-drawer.open{transform:translateX(0)}
      .drawer-overlay{position:fixed;z-index:40;inset:0;background:#08142699;opacity:0;visibility:hidden;display:block;transition:.25s}
      .drawer-overlay.open{opacity:1;visibility:visible}
      .drawer-head{display:flex;align-items:center;gap:14px;padding:20px;border-bottom:1px solid var(--line);font-weight:800}
      .drawer-head>a{margin-left:auto;color:var(--theme);font-size:13px}
      .drawer-close{border:0;background:transparent;font-size:28px;color:var(--muted);cursor:pointer}
      .drawer-menu{padding:10px 20px 30px}
      .drawer-link,.drawer-toggle{display:block;width:100%;padding:14px 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(--theme)}
      .drawer-toggle.active:after{content:"－"}
      .drawer-submenu{display:none;padding:5px 0 8px 15px}
      .drawer-submenu.open{display:block}
      .drawer-submenu a{display:block;padding:8px 0;color:var(--muted);font-size:14px}
    }
    @media(max-width:760px){
      .container{width:min(100% - 28px,1180px)}
      .topbar .container{padding:7px 0;align-items:flex-start}
      .topbar-links{flex-direction:column;gap:0;text-align:right}
      .header-inner{height:68px;gap:10px}
      .logo{min-width:0;font-size:16px}
      .logo img{width:32px;height:32px}
      .open-btn{padding:7px 10px}
      .tool-detail-page{padding:32px 0 55px}
      .tool-layout{grid-template-columns:1fr}
      .tool-article{padding:22px}
      .tool-heading{gap:13px}
      .tool-heading img{width:58px;height:58px;padding:9px}
      .tool-heading h1{font-size:28px}
      .tool-sidebar{position:static}
      .footer-grid{grid-template-columns:1fr 1fr;gap:25px}
      .footer-brand{grid-column:1/-1}
      .footer-bottom{display:block}
      .footer-bottom span{display:block;margin-top:5px}
    }
    @media(max-width:460px){
      .footer-grid{grid-template-columns:1fr}
      .footer-brand{grid-column:auto}
      .topbar{font-size:11px}
      .open-btn{display:none}
    }