:root {
      --brand: #0B3D91;
      --brand-dark: #082b67;
      --ink: #172438;
      --muted: #627086;
      --line: #dce3ec;
      --surface: #ffffff;
      --soft: #f3f6fa;
      --accent: #d1a53a;
      --radius: 6px;
    }
    * { box-sizing: border-box; }
    body { margin: 0; color: var(--ink); background: #fff; font-family: Arial, "Microsoft YaHei", sans-serif; line-height: 1.6; }
    a { color: inherit; text-decoration: none; }
    img { max-width: 100%; }
    .container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
    .topbar { background: #10243f; color: #dbe4f1; font-size: 13px; }
    .topbar .container { min-height: 36px; display: flex; justify-content: space-between; align-items: center; gap: 16px; }
    .topbar a { margin-left: 18px; color: inherit; }
    .header { position: relative; z-index: 20; background: #fff; border-bottom: 1px solid var(--line); }
    .header-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .logo { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; color: var(--brand-dark); font-weight: 700; }
    .logo img { width: 38px; height: 38px; object-fit: contain; }
    .main-nav { margin-left: auto; }
    .nav-list { display: flex; align-items: stretch; gap: 3px; padding: 0; margin: 0; list-style: none; }
    .nav-item { position: relative; }
    .nav-link { display: flex; align-items: center; min-height: 76px; padding: 0 12px; font-size: 14px; font-weight: 600; white-space: nowrap; }
    .nav-link:hover, .nav-item:focus-within > .nav-link { color: var(--brand); }
    .has-arrow::after { content: ""; width: 6px; height: 6px; border-right: 1px solid currentColor; border-bottom: 1px solid currentColor; transform: rotate(45deg); margin: -4px 0 0 8px; }
    .dropdown-panel, .mega-menu { position: absolute; top: 100%; left: 0; display: none; background: #fff; border: 1px solid var(--line); border-top: 2px solid var(--brand); box-shadow: 0 16px 34px rgba(17, 37, 66, .14); }
    .dropdown-panel { width: 250px; padding: 10px; }
    .dropdown-panel a { display: block; padding: 9px 10px; border-radius: 4px; font-size: 13px; }
    .dropdown-panel a:hover { background: var(--soft); color: var(--brand); }
    .mega-menu { left: 50%; width: min(760px, calc(100vw - 40px)); padding: 20px; transform: translateX(-50%); }
    .nav-item:hover > .dropdown-panel, .nav-item:focus-within > .dropdown-panel,
    .nav-item:hover > .mega-menu, .nav-item:focus-within > .mega-menu { display: block; }
    .mega-title { margin: 0 0 10px; color: var(--brand-dark); font-size: 14px; font-weight: 700; }
    .mega-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 9px; margin-bottom: 15px; }
    .mega-card { min-width: 0; padding: 11px; border: 1px solid var(--line); border-radius: 4px; }
    .mega-card:hover { border-color: var(--brand); background: #f7f9fc; }
    .mega-card img { display: block; width: 36px; height: 36px; margin-bottom: 7px; object-fit: contain; }
    .mega-card strong, .mega-card small { display: block; }
    .mega-card strong { font-size: 13px; }
    .mega-card small { margin-top: 3px; color: var(--muted); font-size: 11px; line-height: 1.45; }
    .mega-footer { display: inline-block; color: var(--brand); font-size: 13px; font-weight: 700; }
    .header-btns { display: flex; align-items: center; gap: 9px; }
    .member-btn, .open-btn { padding: 8px 11px; border-radius: 4px; font-size: 13px; white-space: nowrap; }
    .member-btn { color: var(--brand); border: 1px solid var(--line); }
    .open-btn { color: #fff; background: var(--brand); }
    .hamburger { display: none; width: 40px; height: 40px; padding: 10px; border: 1px solid var(--line); border-radius: 4px; background: #fff; cursor: pointer; }
    .hamburger span { display: block; height: 2px; margin: 4px 0; background: var(--ink); transition: transform .2s, opacity .2s; }
    .hamburger.active span:first-child { transform: translateY(6px) rotate(45deg); }
    .hamburger.active span:nth-child(2) { opacity: 0; }
    .hamburger.active span:last-child { transform: translateY(-6px) rotate(-45deg); }
    .drawer-overlay { position: fixed; inset: 0; z-index: 40; display: none; background: rgba(8, 20, 38, .48); }
    .drawer-overlay.open { display: block; }
    .mobile-drawer { position: fixed; top: 0; right: 0; z-index: 41; width: min(390px, 88vw); height: 100dvh; overflow-y: auto; background: #fff; transform: translateX(100%); transition: transform .25s ease; }
    .mobile-drawer.open { transform: translateX(0); }
    .drawer-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 18px; border-bottom: 1px solid var(--line); font-size: 14px; }
    .drawer-head > a { color: var(--brand); font-weight: 700; }
    .drawer-close { width: 34px; height: 34px; border: 1px solid var(--line); border-radius: 4px; background: #fff; font-size: 22px; cursor: pointer; }
    .drawer-menu { padding: 10px 18px 24px; }
    .drawer-link, .drawer-toggle { display: block; width: 100%; padding: 13px 4px; border: 0; border-bottom: 1px solid var(--line); background: transparent; color: var(--ink); text-align: left; font: inherit; font-size: 14px; cursor: pointer; }
    .drawer-toggle::after { content: "+"; float: right; color: var(--muted); }
    .drawer-toggle.active::after { content: "−"; }
    .drawer-submenu { display: none; padding: 4px 0 8px 12px; }
    .drawer-submenu.open { display: block; }
    .drawer-submenu a { display: block; padding: 8px 4px; color: var(--muted); font-size: 13px; }
    .footer { margin-top: 60px; padding: 42px 0 18px; color: #dbe4f1; background: #10243f; }
    .footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 30px; }
    .footer-grid h3 { margin: 0 0 12px; color: #fff; font-size: 14px; }
    .footer-grid p { margin: 7px 0; color: #b7c4d5; font-size: 13px; }
    .footer-grid a { display: block; width: fit-content; margin: 7px 0; color: #b7c4d5; font-size: 13px; }
    .footer-grid a:hover { color: #fff; }
    .footer-brand strong { color: #fff; font-size: 18px; }
    .footer-bottom { margin-top: 30px; padding-top: 15px; border-top: 1px solid rgba(255,255,255,.16); color: #aab8ca; font-size: 12px; }

    .tools-page { padding: 36px 0 0; }
    .tools-page .breadcrumbs { margin-bottom: 18px; color: var(--muted); font-size: 13px; }
    .tools-page .breadcrumbs a { color: var(--brand); }
    .tools-page .page-intro { padding: 0 0 25px; border-bottom: 1px solid var(--line); }
    .tools-page .eyebrow { color: var(--brand); font-size: 12px; font-weight: 700; }
    .tools-page h1 { margin: 7px 0; color: var(--ink); font-size: 32px; line-height: 1.25; }
    .tools-page .intro-copy { max-width: 760px; margin: 0; color: var(--muted); }
    .tools-page .tool-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; padding: 24px 0 0; }
    .tools-page .tool-card { display: flex; flex-direction: column; min-width: 0; padding: 18px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); transition: border-color .18s, box-shadow .18s, transform .18s; }
    .tools-page .tool-card:hover { transform: translateY(-2px); border-color: #9bb4d8; box-shadow: 0 8px 20px rgba(15, 44, 84, .08); }
    .tools-page .tool-card-head { display: flex; align-items: center; gap: 12px; }
    .tools-page .tool-icon { display: grid; flex: 0 0 44px; width: 44px; height: 44px; place-items: center; overflow: hidden; border: 1px solid var(--line); border-radius: 5px; background: var(--soft); }
    .tools-page .tool-icon img { width: 30px; height: 30px; object-fit: contain; }
    .tools-page .tool-card h2 { margin: 0; font-size: 17px; line-height: 1.35; }
    .tools-page .tool-summary { flex: 1; min-height: 4.5em; margin: 14px 0; color: var(--muted); font-size: 14px; }
    .tools-page .tool-card-link { display: inline-flex; align-items: center; gap: 7px; width: fit-content; color: var(--brand); font-size: 13px; font-weight: 700; }
    .tools-page .tool-card-link::after { content: "→"; }
    .tools-page .tools-note { margin-top: 26px; padding: 16px 18px; border-left: 3px solid var(--accent); background: #f7f8fa; color: #526176; font-size: 13px; }
    .tools-page .tools-note strong { color: var(--ink); }
    .tools-page .pagination { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 24px; }
    .tools-page .pagination a { min-width: 36px; padding: 6px 10px; border: 1px solid var(--line); border-radius: 4px; color: var(--brand); text-align: center; font-size: 13px; }
    .tools-page .pagination a:hover, .tools-page .pagination a.active { border-color: var(--brand); color: #fff; background: var(--brand); }
    @media (max-width: 1020px) {
      .main-nav { display: none; }
      .hamburger { display: block; }
      .header-inner { min-height: 68px; }
      .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    }
    @media (max-width: 680px) {
      .container { width: min(100% - 28px, 1180px); }
      .topbar .container { min-height: 34px; font-size: 11px; }
      .topbar .container > span:last-child a { margin-left: 8px; }
      .header-btns { gap: 6px; }
      .member-btn { display: none; }
      .open-btn { padding: 7px 9px; font-size: 12px; }
      .tools-page { padding-top: 24px; }
      .tools-page h1 { font-size: 27px; }
      .tools-page .tool-grid { grid-template-columns: 1fr; gap: 11px; padding-top: 17px; }
      .tools-page .tool-card { padding: 15px; }
      .tools-page .tool-summary { min-height: 0; }
      .footer { margin-top: 42px; padding-top: 32px; }
      .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px 16px; }
    }
    @media (max-width: 390px) {
      .topbar .container { align-items: flex-start; flex-direction: column; gap: 0; padding: 5px 0; }
      .topbar .container > span:last-child a:first-child { margin-left: 0; }
      .footer-grid { grid-template-columns: 1fr; }
    }