:root{
      --primary:#0B3D91;
      --primary-dark:#082b68;
      --ink:#172033;
      --muted:#647089;
      --line:#e4e9f2;
      --surface:#fff;
      --soft:#f4f7fc;
      --shadow:0 18px 45px rgba(16,39,82,.10);
      --radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#f7f9fd;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans TC",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:#dbe5f7;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:20;background:#fff;border-bottom:1px solid var(--line)}
    .header-inner{min-height:78px;display:flex;align-items:center;gap:30px}
    .logo{display:flex;align-items:center;gap:10px;min-width:max-content;font-weight:800;font-size:19px;color:var(--primary)}
    .logo img{width:35px;height:35px;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:27px 14px;color:#354057;font-size:14px;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--primary)}
    .has-arrow:after{content:"⌄";font-size:12px;margin-left:6px;color:#8490a6}
    .dropdown-panel,.mega-menu{position:absolute;top:calc(100% + 1px);left:50%;transform:translateX(-50%);width:320px;padding:20px;background:#fff;border:1px solid var(--line);border-radius:0 0 16px 16px;box-shadow:var(--shadow);opacity:0;visibility:hidden;pointer-events:none;transition:.2s}
    .mega-menu{width:610px}
    .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-list{display:grid;gap:9px}
    .dropdown-list a,.mega-links a{padding:8px 10px;border-radius:8px;color:#4d5a73}
    .dropdown-list a:hover,.mega-links a:hover{background:var(--soft);color:var(--primary)}
    .mega-heading{font-size:14px;margin:0 0 13px;color:var(--primary)}
    .mega-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
    .mega-card{display:flex;gap:9px;align-items:center;padding:9px;border:1px solid var(--line);border-radius:11px;background:#fff}
    .mega-card:hover{border-color:#9db5dc;background:#f8fbff}
    .mega-card img{width:34px;height:34px;border-radius:8px;object-fit:cover;background:#e9eef7;flex:none}
    .mega-card span span{display:block;color:#77839a;font-size:11px;line-height:1.35;margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:215px}
    .mega-card strong{display:block;font-size:12px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
    .mega-links{display:grid;grid-template-columns:repeat(2,1fr);gap:3px}
    .mega-footer{display:block;margin-top:15px;padding-top:12px;border-top:1px solid var(--line);color:var(--primary);font-size:13px;font-weight:700}
    .header-btns{display:flex;align-items:center;gap:10px;margin-left:10px;white-space:nowrap}
    .member-btn{font-size:13px;color:var(--primary);font-weight:700}
    .open-btn{padding:9px 16px;border-radius:9px;background:var(--primary);color:#fff;font-size:13px;font-weight:700}
    .open-btn:hover{background:var(--primary-dark)}
    .hamburger{display:none;border:0;background:none;padding:7px;cursor:pointer}
    .hamburger span{display:block;width:24px;height:2px;background:#24324a;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:58px 0 80px}
    .breadcrumb{display:flex;gap:8px;align-items:center;color:#78849a;font-size:13px;margin-bottom:26px}
    .breadcrumb a{color:var(--primary)}
    .tool-layout{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:30px;align-items:start}
    .tool-main,.tool-sidebar{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 10px 30px rgba(20,43,83,.05)}
    .tool-main{padding:36px}
    .tool-header{display:flex;gap:20px;align-items:flex-start;padding-bottom:25px;border-bottom:1px solid var(--line)}
    .tool-icon{width:76px;height:76px;border-radius:18px;object-fit:cover;background:#edf3fc;flex:none}
    .tool-kicker{font-size:13px;color:var(--primary);font-weight:700;margin:0 0 6px}
    .tool-title{font-size:clamp(28px,4vw,44px);line-height:1.2;margin:0 0 9px;letter-spacing:-.03em}
    .tool-intro{margin:0;color:var(--muted);font-size:16px}
    .tool-meta{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:18px;color:#6b7890;font-size:13px}
    .tool-meta strong{color:#263752}
    .tool-content{min-width:0;max-width:100%;overflow-x:auto;padding-top:30px}
    .tool-content h2{font-size:25px;margin:28px 0 13px;color:#162b50}
    .tool-content h3{font-size:19px;margin:24px 0 10px;color:#243d68}
    .tool-content p{margin:0 0 16px;color:#4f5d74}
    .tool-content ul,.tool-content ol{padding-left:23px;color:#4f5d74}
    .tool-content li{margin:7px 0}
    .tool-content table{width:100%;min-width:560px;border-collapse:collapse;margin:20px 0}
    .tool-content th,.tool-content td{padding:12px 14px;border:1px solid var(--line);text-align:left}
    .tool-content th{background:#f2f6fc;color:#243d68}
    .tool-content img{max-width:100%;height:auto}
    .tool-callout{padding:19px 21px;border-left:4px solid var(--primary);background:#f1f6ff;border-radius:10px;margin:24px 0;color:#41536f}
    .tool-sidebar{padding:23px;position:sticky;top:20px}
    .side-title{margin:0 0 17px;font-size:18px}
    .related-tool{display:flex;gap:11px;padding:13px 0;border-bottom:1px solid var(--line)}
    .related-tool:last-child{border-bottom:0}
    .related-tool img{width:42px;height:42px;border-radius:10px;object-fit:cover;background:#eef3fb;flex:none}
    .related-tool strong{display:block;font-size:14px;color:#263a5d}
    .related-tool span{display:block;font-size:12px;line-height:1.45;color:#7a869b;margin-top:3px}
    .side-note{margin-top:20px;padding:15px;background:#f7f9fd;border-radius:11px;color:#68758c;font-size:13px}

    .footer{background:#101a2c;color:#d3dced;padding:52px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:34px}
    .footer-brand strong{font-size:20px;color:#fff}
    .footer p{color:#aebbd0;font-size:13px;margin:13px 0}
    .footer h3{font-size:14px;color:#fff;margin:0 0 13px}
    .footer-grid>div:not(.footer-brand) a,.footer-grid>div:not(.footer-brand)>span{display:block;color:#acb9ce;font-size:13px;margin:7px 0}
    .footer-grid a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid #2b3850;margin-top:32px;padding-top:18px;color:#8f9db5;font-size:12px}

    @media(max-width:980px){
      .main-nav{display:none}
      .hamburger{display:block}
      .header-btns{margin-left:auto}
      .mobile-drawer{display:block;position:fixed;z-index:50;top:0;right:0;width:min(390px,88vw);height:100vh;background:#fff;transform:translateX(105%);transition:.25s;overflow:auto;box-shadow:-12px 0 35px rgba(0,0,0,.16)}
      .mobile-drawer.open{transform:translateX(0)}
      .drawer-overlay{display:block;position:fixed;z-index:40;inset:0;background:rgba(9,20,40,.5);opacity:0;visibility:hidden;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:700;color:var(--primary)}
      .drawer-head>a{margin-left:auto;color:#fff;background:var(--primary);padding:6px 12px;border-radius:7px;font-size:13px}
      .drawer-close{border:0;background:none;font-size:28px;color:#647089;line-height:1;cursor:pointer}
      .drawer-menu{padding:13px 20px}
      .drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 0;border:0;border-bottom:1px solid var(--line);background:none;text-align:left;color:#273752;font-weight:600;cursor:pointer}
      .drawer-toggle:after{content:"＋";float:right;color:#91a0b6}
      .drawer-toggle.active:after{content:"－"}
      .drawer-submenu{display:none;padding:4px 0 7px 15px}
      .drawer-submenu.open{display:block}
      .drawer-submenu a{display:block;padding:8px 0;color:#6a7890;font-size:13px}
      .tool-layout{grid-template-columns:1fr}
      .tool-sidebar{position:static}
    }
    @media(max-width:640px){
      .container{width:min(100% - 28px,1180px)}
      .topbar-inner{padding:7px 0;align-items:flex-start;flex-direction:column;gap:2px}
      .topbar-contact{gap:12px;flex-wrap:wrap}
      .header-inner{min-height:68px}
      .member-btn{display:none}
      .tool-detail-page{padding:34px 0 55px}
      .tool-main{padding:22px}
      .tool-header{gap:13px}
      .tool-icon{width:58px;height:58px;border-radius:14px}
      .tool-title{font-size:28px}
      .tool-intro{font-size:14px}
      .footer{padding-top:38px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:25px 18px}
      .footer-brand{grid-column:1/-1}
      .footer-bottom{display:block}
      .footer-bottom span{display:block;margin-top:7px}
    }