:root{
      --primary:#0B3D91;
      --primary-dark:#082d6b;
      --ink:#172033;
      --muted:#667085;
      --line:#e7ebf2;
      --soft:#f5f7fb;
      --white:#fff;
      --radius:18px;
      --shadow:0 18px 55px rgba(15,32,65,.10);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#f8faff;font-family:Arial,"PingFang HK","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:0 auto}
    .topbar{background:#101827;color:#cbd5e1;font-size:13px}
    .topbar-inner{min-height:38px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar-links{display:flex;gap:20px}
    .topbar a{color:#e8eef8}
    .header{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
    .header-inner{height:76px;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:10px;min-width:max-content;font-weight:800;color:var(--ink)}
    .logo img{width:34px;height:34px;object-fit:contain}
    .main-nav{flex:1}
    .nav-list{display:flex;align-items:center;justify-content:center;gap:4px;padding:0;margin:0;list-style:none}
    .nav-item{position:relative}
    .nav-link{display:block;padding:25px 13px;font-size:14px;font-weight:700;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--primary)}
    .has-arrow:after{content:"⌄";font-size:12px;margin-left:6px;color:#8b96a8}
    .dropdown-panel,.mega-menu{position:absolute;top:calc(100% - 1px);left:50%;transform:translateX(-50%);width:300px;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 ease}
    .mega-menu{width:560px}
    .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:-14px;height:14px}
    .mega-title{margin:0 0 13px;color:var(--primary);font-size:13px;font-weight:800;letter-spacing:.04em}
    .dropdown-list{display:grid;gap:8px}
    .dropdown-list a{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}
    .mega-card:hover{border-color:#a9c0e8;background:#f8fbff}
    .mega-card img{width:35px;height:35px;object-fit:contain;border-radius:7px;flex:0 0 auto}
    .mega-card span{display:grid;min-width:0}
    .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:12px;border-top:1px solid var(--line);font-size:13px;color:var(--primary);font-weight:700}
    .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;background:var(--primary);border-radius:9px;color:#fff;font-size:13px;font-weight:700}
    .open-account:hover{background:var(--primary-dark)}
    .hamburger{display:none;border:0;background:transparent;padding:7px;cursor:pointer}
    .hamburger span{display:block;width:23px;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{display:none;position:fixed;inset:0;background:rgba(5,15,35,.52);z-index:40}
    .drawer-overlay.open{display:block}
    .mobile-drawer{position:fixed;top:0;right:0;bottom:0;width:min(390px,88vw);z-index:41;background:#fff;transform:translateX(105%);transition:.28s ease;overflow:auto;box-shadow:-12px 0 40px rgba(0,0,0,.18)}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{height:70px;display:flex;align-items:center;gap:15px;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:27px;color:#697386;cursor:pointer}
    .drawer-menu{padding:14px 20px 35px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 0;border:0;border-bottom:1px solid var(--line);background:transparent;text-align:left;color:var(--ink);font-size:15px;font-weight:700;cursor:pointer}
    .drawer-toggle:after{content:"＋";float:right;color:var(--primary)}
    .drawer-toggle.active:after{content:"－"}
    .drawer-submenu{display:none;padding:5px 0 7px 15px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:8px 0;color:var(--muted);font-size:14px}
    .drawer-submenu a:hover{color:var(--primary)}
    .tool-detail-page{padding:58px 0 82px}
    .tool-breadcrumb{display:flex;align-items:center;gap:9px;margin-bottom:24px;color:var(--muted);font-size:13px}
    .tool-breadcrumb a{color:var(--primary)}
    .tool-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:28px;align-items:start}
    .tool-main-card,.tool-side-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
    .tool-main-card{padding:clamp(24px,4vw,46px)}
    .tool-heading{display:flex;align-items:flex-start;gap:20px;padding-bottom:25px;border-bottom:1px solid var(--line)}
    .tool-icon{width:76px;height:76px;object-fit:contain;border-radius:18px;padding:12px;background:#edf3ff;border:1px solid #dce8fb;flex:0 0 auto}
    .tool-heading h1{margin:0 0 8px;font-size:clamp(26px,4vw,42px);line-height:1.2;letter-spacing:-.03em}
    .tool-intro{margin:0;color:var(--muted);font-size:16px}
    .tool-meta{display:flex;flex-wrap:wrap;gap:9px;margin-top:14px}
    .tool-meta span{padding:5px 10px;border-radius:999px;background:#f1f5fb;color:#536174;font-size:12px}
    .tool-meta strong{color:var(--primary)}
    .tool-actions{display:flex;flex-wrap:wrap;gap:12px;margin:25px 0 5px}
    .tool-action{display:inline-flex;align-items:center;justify-content:center;min-height:43px;padding:9px 18px;border-radius:9px;background:var(--primary);color:#fff;font-weight:700;font-size:14px}
    .tool-action.secondary{background:#edf3ff;color:var(--primary)}
    .tool-content{min-width:0;max-width:100%;overflow-x:auto;padding-top:28px;color:#354154}
    .tool-content h2,.tool-content h3{color:var(--ink);line-height:1.35;margin:26px 0 12px}
    .tool-content h2{font-size:24px}
    .tool-content h3{font-size:19px}
    .tool-content p{margin:0 0 16px}
    .tool-content img,.tool-content table{max-width:100%;height:auto}
    .tool-content table{border-collapse:collapse;min-width:580px}
    .tool-content td,.tool-content th{padding:10px 12px;border:1px solid var(--line);text-align:left}
    .tool-content ul,.tool-content ol{padding-left:24px}
    .tool-side-card{padding:23px}
    .tool-side-card h2{margin:0 0 17px;font-size:19px}
    .related-tool{display:flex;gap:11px;padding:13px 0;border-top:1px solid var(--line)}
    .related-tool:first-of-type{border-top:0}
    .related-tool img{width:42px;height:42px;object-fit:contain;border-radius:9px;background:#f0f4fb;padding:6px;flex:0 0 auto}
    .related-tool strong{display:block;font-size:14px;line-height:1.35}
    .related-tool small{display:block;margin-top:4px;color:var(--muted);font-size:12px;line-height:1.45}
    .side-more{display:block;margin-top:14px;padding-top:14px;border-top:1px solid var(--line);color:var(--primary);font-size:13px;font-weight:700}
    .footer{background:#101827;color:#bac5d5;padding:54px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:35px}
    .footer .logo{color:#fff;margin-bottom:16px}
    .footer-brand p,.footer-col p{margin:0;color:#9eacbf;font-size:13px}
    .footer-col h3{margin:0 0 15px;color:#fff;font-size:14px}
    .footer-links{display:grid;gap:8px;padding:0;margin:0;list-style:none;font-size:13px}
    .footer-links a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:40px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);font-size:12px;color:#8d9bb0}
    @media(max-width:1050px){
      .nav-link{padding-left:8px;padding-right:8px}
      .member-link{display:none}
    }
    @media(max-width:820px){
      .topbar-inner{padding:8px 0;align-items:flex-start}
      .topbar-links{gap:10px;flex-direction:column;align-items:flex-end}
      .header-inner{height:66px}
      .main-nav{display:none}
      .hamburger{display:block}
      .tool-layout{grid-template-columns:1fr}
      .tool-side-card{order:2}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:560px){
      .container{width:min(100% - 28px,1180px)}
      .topbar{font-size:11px}
      .topbar-inner{gap:8px}
      .open-account{display:none}
      .tool-detail-page{padding:35px 0 55px}
      .tool-heading{gap:13px}
      .tool-icon{width:58px;height:58px;border-radius:13px;padding:8px}
      .tool-heading h1{font-size:27px}
      .tool-intro{font-size:14px}
      .tool-main-card{padding:22px 17px}
      .footer-grid{grid-template-columns:1fr;gap:25px}
      .footer-bottom{display:grid;gap:8px}
    }