:root {
      --blue-950: #0b2f4d;
      --blue-900: #0f3f66;
      --blue-700: #1f6f9f;
      --blue-500: #49a7d8;
      --blue-100: #eaf7fd;
      --blue-50: #f5fbfe;
      --green-600: #21856f;
      --ink: #1d2935;
      --muted: #607080;
      --line: #d9edf6;
      --white: #ffffff;
      --shadow: 0 16px 40px rgba(15, 63, 102, 0.11);
      --radius: 14px;
    }

    * { box-sizing: border-box; }
    body { margin: 0; font-family: Arial, sans-serif; color: var(--ink); background: var(--white); line-height: 1.65; }
    a { color: inherit; text-decoration: none; }
    .container { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
    .topbar { background: var(--blue-900); color: var(--white); font-size: 14px; }
    .topbar-inner { min-height: 40px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
    .header { position: sticky; top: 0; z-index: 20; background: rgba(255, 255, 255, 0.96); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); }
    .header-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .brand { min-width: 250px; display: flex; align-items: center; gap: 10px; }
    .brand-logo { width: 44px; height: 44px; border-radius: 6px; object-fit: contain; background: #06151e; padding: 4px; flex: 0 0 auto; }
    .brand strong { display: block; color: var(--blue-900); font-size: 18px; line-height: 1.2; }
    .brand span span { display: block; color: var(--muted); font-size: 13px; margin-top: 3px; }
    .nav { display: flex; align-items: center; gap: 22px; color: #405466; font-size: 14px; white-space: nowrap; }
    .nav a, .nav summary { color: #405466; font: inherit; cursor: pointer; }
    .nav a:hover, .nav summary:hover { color: var(--blue-700); }
    .nav a:focus-visible, .nav summary:focus-visible { color: var(--blue-700); outline: 2px solid var(--blue-500); outline-offset: 4px; border-radius: 6px; }
    .nav details { position: relative; }
    .nav summary { list-style: none; }
    .nav summary::-webkit-details-marker { display: none; }
    .nav summary::after { content: "v"; font-size: 11px; margin-left: 6px; }
    .dropdown { position: absolute; top: calc(100% + 14px); left: 0; width: 190px; padding: 8px; border: 1px solid var(--line); border-radius: 12px; background: var(--white); box-shadow: var(--shadow); display: grid; gap: 4px; }
    .dropdown a { display: block; padding: 10px 12px; border-radius: 9px; }
    .dropdown a:hover { background: var(--blue-50); }
    .menu-toggle { display: none; }
    .button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 11px 18px; border-radius: 999px; border: 1px solid var(--blue-700); background: var(--blue-700); color: var(--white); font-weight: 700; font-size: 14px; transition: 220ms ease; }
    .button:hover { transform: translateY(-1px); background: var(--blue-900); border-color: var(--blue-900); }
    .button:focus-visible { transform: translateY(-1px); background: var(--blue-900); border-color: var(--blue-900); outline: 2px solid var(--blue-500); outline-offset: 3px; }
    .button-soft { background: var(--white); color: var(--blue-900); border-color: var(--line); }
    .button-soft:hover, .button-soft:focus-visible { color: var(--white); border-color: var(--blue-700); background: var(--blue-700); }
    .breadcrumb { padding: 18px 0; font-size: 14px; color: var(--muted); background: var(--blue-50); border-bottom: 1px solid var(--line); }
    .breadcrumb ol { padding: 0; margin: 0; list-style: none; display: flex; flex-wrap: wrap; gap: 8px; }
    .breadcrumb li:not(:last-child)::after { content: "/"; margin-left: 8px; color: #9db5c4; }
    .breadcrumb a { color: var(--blue-900); }
    .breadcrumb a:focus-visible { outline: 2px solid var(--blue-500); outline-offset: 3px; border-radius: 6px; }
    .hero { padding: 72px 0; background: linear-gradient(135deg, #f5fbfe 0%, #ffffff 62%, #eaf7fd 100%); border-bottom: 1px solid var(--line); }
    .hero-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr); gap: 44px; align-items: center; }
    .eyebrow { display: inline-flex; align-items: center; margin-bottom: 12px; color: var(--green-600); font-size: 13px; font-weight: 800; letter-spacing: 0; text-transform: uppercase; }
    h1, h2, h3, p { margin-top: 0; }
    h1 { margin-bottom: 18px; color: var(--blue-950); font-size: clamp(38px, 5.8vw, 62px); line-height: 1.06; letter-spacing: 0; }
    h2 { color: var(--blue-950); font-size: clamp(26px, 3vw, 36px); line-height: 1.18; margin-bottom: 16px; letter-spacing: 0; }
    h3 { color: var(--blue-900); font-size: 19px; line-height: 1.35; margin-bottom: 10px; transition: 220ms ease; }
    .subheading { color: var(--blue-700); font-size: 22px; line-height: 1.4; font-weight: 700; margin-bottom: 18px; }
    .lead { color: #3f5364; font-size: 18px; margin-bottom: 14px; }
    .hero-actions, .cta-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
    .hero-media { overflow: hidden; border-radius: 12px; border: 1px solid var(--line); background: var(--white); box-shadow: var(--shadow); aspect-ratio: 4 / 3; }
    .hero-media img { width: 100%; height: 100%; object-fit: cover; display: block; transition: 260ms ease; }
    .hero-media:hover img { transform: scale(1.04); }
    .section { padding: 72px 0; background: var(--white); }
    .section-soft { background: var(--blue-50); }
    .section-head { max-width: 900px; margin-bottom: 30px; }
    .section-head p, .text-block p, .note p { color: var(--muted); font-size: 17px; }
    .text-block { max-width: 920px; padding: 34px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); box-shadow: var(--shadow); }
    .grid { display: grid; gap: 18px; }
    .grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
    .card, .note, .faq { border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); box-shadow: 0 10px 28px rgba(15, 63, 102, 0.07); transition: 240ms ease; }
    .card, .note { padding: 24px; }
    .card:hover, .card:focus-within, .faq:hover { transform: translateY(-5px); border-color: var(--blue-700); box-shadow: 0 18px 42px rgba(15, 63, 102, 0.15); }
    .card:hover h3, .card:focus-within h3 { color: var(--blue-700); }
    .badge { display: inline-flex; margin-bottom: 12px; padding: 5px 10px; border-radius: 999px; background: var(--blue-100); color: var(--blue-900); font-size: 12px; font-weight: 800; }
    .card p { color: var(--muted); margin-bottom: 0; }
    .card-link { display: inline-flex; margin-top: 16px; color: var(--blue-700); font-weight: 800; }
    .card-link:focus-visible { color: var(--blue-700); outline: 2px solid var(--blue-500); outline-offset: 4px; }
    .checklist { list-style: none; padding: 0; margin: 18px 0 0; display: grid; gap: 10px; }
    .checklist li { position: relative; padding-left: 28px; color: #3f5364; }
    .checklist li::before { content: ""; position: absolute; left: 0; top: 9px; width: 10px; height: 10px; border-radius: 50%; background: var(--green-600); box-shadow: 0 0 0 4px rgba(33, 133, 111, 0.12); }
    .comparison-grid { display: grid; gap: 14px; }
    .comparison-card { display: grid; grid-template-columns: 0.9fr 1.25fr 1.25fr; gap: 14px; padding: 18px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); box-shadow: 0 8px 22px rgba(15, 63, 102, 0.06); }
    .comparison-card h3 { margin-bottom: 0; }
    .comparison-cell span { display: block; color: var(--blue-900); font-size: 13px; font-weight: 800; margin-bottom: 4px; }
    .comparison-cell p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.5; }
    .faq-list { display: grid; gap: 12px; }
    .faq { padding: 0; }
    .faq summary { min-height: 58px; padding: 18px 22px; color: var(--blue-900); font-weight: 800; cursor: pointer; outline: none; list-style: none; }
    .faq summary::-webkit-details-marker { display: none; }
    .faq summary::after { content: "+"; float: right; color: var(--blue-700); font-size: 22px; line-height: 1; }
    .faq[open] summary::after { content: "-"; }
    .faq summary:focus-visible { outline: 2px solid var(--blue-500); outline-offset: 3px; border-radius: 10px; }
    .faq p { margin: 0; padding: 0 22px 20px; color: var(--muted); }
    .cta { padding: 42px; border-radius: 16px; background: linear-gradient(135deg, var(--blue-900), var(--blue-700)); color: var(--white); }
    .cta h2 { color: var(--white); }
    .cta p { color: rgba(255, 255, 255, 0.88); max-width: 860px; }
    .cta .button-soft { color: var(--white); background: transparent; border-color: rgba(255, 255, 255, 0.45); }
    .cta .button-soft:hover, .cta .button-soft:focus-visible { color: var(--blue-900); background: var(--white); }
    footer { padding: 28px 0; color: #d9e9f2; background: var(--blue-950); font-size: 14px; }

    @media (max-width: 980px) {
      .header-inner { flex-wrap: wrap; padding: 12px 0; }
      .menu-toggle { display: inline-flex; align-items: center; justify-content: center; min-height: 40px; padding: 8px 14px; border: 1px solid var(--line); border-radius: 999px; background: var(--white); color: var(--blue-900); font-weight: 800; }
      .nav { display: none; width: 100%; flex-direction: column; align-items: flex-start; gap: 12px; padding-bottom: 10px; }
      .nav.is-open { display: flex; }
      .dropdown { position: static; width: 100%; margin-top: 10px; }
      .hero-grid, .grid-2, .grid-3, .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
      .comparison-card { grid-template-columns: 1fr; }
    }

    @media (max-width: 640px) {
      .container { width: min(100% - 24px, 1120px); }
      .topbar-inner { align-items: flex-start; flex-direction: column; padding: 8px 0; gap: 4px; }
      .brand { min-width: 0; }
      .hero, .section { padding: 48px 0; }
      .hero-grid, .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
      h1 { font-size: 36px; }
      .subheading { font-size: 19px; }
      .lead { font-size: 16px; }
      .text-block, .note, .card, .cta { padding: 22px; }
      .hero-actions, .cta-actions { flex-direction: column; }
      .button { width: 100%; }
    }