:root {
      --brand:#0b5cab; --brand-dark:#083d74; --ink:#0f172a; --muted:#475569; --line:#dbe3ef;
      --bg:#f4f8fc; --card:#ffffff; --accent:#eaf3ff; --radius:18px; --shadow:0 10px 30px rgba(15,23,42,.08); --max:1140px;
    }
    * { box-sizing:border-box; }
    html { scroll-behavior:smooth; }
    body { margin:0; font-family:Arial, Helvetica, sans-serif; color:var(--ink); background:var(--bg); line-height:1.72; }
    a { color:var(--brand); text-decoration:none; } a:hover { text-decoration:underline; }
    img { max-width:100%; display:block; }
    .wrap { max-width:var(--max); margin:0 auto; padding:0 20px 72px; }
    .hero { background:linear-gradient(135deg,#0b5cab 0%,#083d74 100%); color:#fff; padding:56px 0 40px; margin-bottom:28px; }
    .eyebrow { display:inline-block; background:rgba(255,255,255,.14); border:1px solid rgba(255,255,255,.22); padding:8px 14px; border-radius:999px; font-size:13px; letter-spacing:.04em; text-transform:uppercase; margin-bottom:14px; }
    h1 { font-size:42px; line-height:1.16; margin:0 0 14px; letter-spacing:-.02em; }
    h2 { font-size:30px; line-height:1.2; margin:0 0 16px; letter-spacing:-.02em; scroll-margin-top:90px; }
    h3 { font-size:22px; line-height:1.3; margin:26px 0 12px; scroll-margin-top:90px; }
    p { margin:0 0 16px; }
    .hero p { color:rgba(255,255,255,.92); font-size:18px; max-width:900px; }
    .hero p a, .hero li a, .hero .small a { color:#dff0ff; font-weight:700; text-decoration:underline; text-underline-offset:3px; text-decoration-thickness:2px; }
    .hero p a:hover, .hero li a:hover, .hero .small a:hover { color:#ffffff; }
    .cta p a, .cta li a, .cta .small a { color:#eaf3ff; font-weight:700; text-decoration:underline; text-underline-offset:3px; text-decoration-thickness:2px; }
    .cta p a:hover, .cta li a:hover, .cta .small a:hover { color:#ffffff; }
    .hero-grid { display:grid; grid-template-columns:1.45fr .95fr; gap:22px; align-items:start; margin-top:24px; }
    .hero-card, .card, .toc, .spec-table-wrap, .cta, .callout, .faq-item { background:var(--card); border:1px solid var(--line); border-radius:var(--radius); box-shadow:var(--shadow); }
    .hero-card { padding:22px; color:var(--ink); }
    .hero-card h2 { font-size:22px; margin-bottom:12px; }
    .mini-list, .check-list, .toc ul { padding-left:20px; margin:0; }
    .hero-stats { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:14px; }
    .stat { background:rgba(255,255,255,.08); border:1px solid rgba(255,255,255,.14); border-radius:16px; padding:16px; }
    .stat strong { display:block; font-size:28px; margin-bottom:4px; }
    .btn-row { display:flex; gap:12px; flex-wrap:wrap; margin-top:18px; }
    .btn { display:inline-flex; align-items:center; justify-content:center; min-height:44px; padding:10px 16px; border-radius:999px; font-weight:700; text-decoration:none; }
    .btn-primary { background:#fff; color:var(--brand-dark); }
    .section { margin:28px 0; }
    .intro-grid { display:grid; grid-template-columns:1fr 1fr; gap:20px; margin:28px 0; }
    .card, .toc { padding:22px; }
    .toc { background:linear-gradient(180deg,#ffffff 0%,#f8fbff 100%); }
    .toc h2 { font-size:22px; margin-bottom:10px; }
    .toc li { margin:8px 0; color:var(--muted); }
    .spec-table-wrap { padding:14px; overflow:auto; margin:24px 0; }
    table { width:100%; border-collapse:collapse; min-width:760px; font-size:15px; }
    th, td { border:1px solid var(--line); padding:12px 10px; vertical-align:top; text-align:left; }
    th { background:#edf5ff; color:#123c72; font-size:14px; }
    .figure { margin:28px 0 34px; background:#fff; border:1px solid var(--line); border-radius:22px; overflow:hidden; box-shadow:var(--shadow); }
    .figure figcaption { padding:14px 18px 18px; color:var(--muted); font-size:14px; background:#fbfdff; border-top:1px solid var(--line); }
    .callout { padding:18px 20px; background:linear-gradient(180deg,#f8fbff 0%,#eef6ff 100%); margin:20px 0; }
    .callout strong { color:var(--brand-dark); }
    .split { display:grid; grid-template-columns:1.15fr .85fr; gap:22px; align-items:start; }
    .cta { padding:24px; margin:28px 0; background:linear-gradient(135deg,#0b5cab 0%,#083d74 100%); color:#fff; border:none; }
    .cta h2 { color:#fff; margin-bottom:10px; } .cta p { color:rgba(255,255,255,.92); }
    .faq-item { padding:18px 20px; margin:14px 0; } .faq-item h3 { margin-top:0; font-size:20px; }
    .pill-row { display:flex; flex-wrap:wrap; gap:10px; margin:16px 0 0; }
    .pill { display:inline-block; padding:8px 12px; border-radius:999px; background:#eef5ff; border:1px solid #d7e7ff; color:#164b86; font-size:13px; font-weight:700; }
    .related-links a { display:inline-block; margin:0 12px 10px 0; font-weight:700; }
    .small, .footer-note { font-size:14px; color:var(--muted); }
    .footer-note { margin-top:34px; padding-top:18px; border-top:1px solid var(--line); }
    @media (max-width: 920px) {
      .hero-grid, .intro-grid, .split { grid-template-columns:1fr; }
      h1 { font-size:34px; } h2 { font-size:28px; }
    }