:root {
      --brand:#0b5cab;
      --brand-dark:#083d74;
      --ink:#0f172a;
      --muted:#475569;
      --line:#dbe3ef;
      --bg:#f4f8fc;
      --card:#ffffff;
      --soft:#f8fbff;
      --accent:#eaf3ff;
      --ok:#0b8a5b;
      --warn:#b45309;
    }
    * { 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:1.75;
    }
    .wrap {
      max-width:1120px;
      margin:0 auto;
      padding:24px;
    }
    .article {
      background:var(--card);
      border:1px solid var(--line);
      border-radius:18px;
      overflow:hidden;
      box-shadow:0 12px 40px rgba(15,23,42,.06);
    }
    .hero {
      padding:44px 48px 30px;
      background:linear-gradient(135deg, #f8fbff 0%, #eef5ff 45%, #ffffff 100%);
      border-bottom:1px solid var(--line);
    }
    .eyebrow {
      display:inline-block;
      background:var(--brand);
      color:#fff;
      font-size:12px;
      letter-spacing:.08em;
      text-transform:uppercase;
      padding:7px 10px;
      border-radius:999px;
      font-weight:700;
      margin-bottom:14px;
    }
    h1,h2,h3 {
      color:var(--ink);
      line-height:1.25;
      margin:0 0 14px;
      scroll-margin-top:88px;
    }
    h1 { font-size:40px; max-width:980px; }
    h2 { font-size:30px; margin-top:44px; }
    h3 { font-size:22px; margin-top:28px; }
    p { margin:0 0 16px; font-size:17px; }
    .hero p { max-width:960px; }
    .meta {
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:18px;
    }
    .meta span {
      background:#fff;
      border:1px solid var(--line);
      color:var(--muted);
      border-radius:999px;
      padding:8px 12px;
      font-size:14px;
    }
    .content {
      padding:34px 48px 48px;
    }
    a {
      color:var(--brand);
      text-decoration:none;
    }
    a:hover { text-decoration:underline; }
    .toc {
      background:var(--soft);
      border:1px solid var(--line);
      border-radius:16px;
      padding:20px 22px;
      margin:0 0 28px;
    }
    .toc-title {
      font-weight:700;
      margin-bottom:10px;
      color:var(--brand-dark);
      font-size:18px;
    }
    .toc ul {
      margin:0;
      padding-left:18px;
      columns:2;
      gap:32px;
    }
    .toc li { margin:6px 0; }
    .quick-box {
      background:linear-gradient(135deg,#ffffff 0%, #f8fbff 100%);
      border:1px solid var(--line);
      border-left:5px solid var(--brand);
      border-radius:14px;
      padding:18px 18px 14px;
      margin:18px 0 26px;
    }
    .figure {
      margin:28px 0 32px;
      background:var(--soft);
      border:1px solid var(--line);
      border-radius:16px;
      padding:14px;
    }
    .figure img {
      width:100%;
      height:auto;
      display:block;
      border-radius:12px;
      background:#fff;
    }
    .figure figcaption {
      color:var(--muted);
      font-size:14px;
      margin-top:10px;
    }
    .compare-table, .spec-table {
      width:100%;
      border-collapse:collapse;
      margin:18px 0 24px;
      font-size:15px;
      background:#fff;
      border:1px solid var(--line);
      border-radius:14px;
      overflow:hidden;
    }
    .compare-table th, .compare-table td,
    .spec-table th, .spec-table td {
      border-bottom:1px solid var(--line);
      padding:14px 14px;
      text-align:left;
      vertical-align:top;
    }
    .compare-table th, .spec-table th {
      background:#eff6ff;
      color:var(--brand-dark);
      font-weight:700;
    }
    .compare-table tr:last-child td,
    .spec-table tr:last-child td {
      border-bottom:none;
    }
    .tag-grid {
      display:grid;
      grid-template-columns:repeat(auto-fit, minmax(230px,1fr));
      gap:14px;
      margin:18px 0 24px;
    }
    .tag-card {
      background:#fff;
      border:1px solid var(--line);
      border-radius:14px;
      padding:16px;
    }
    .tag-card strong {
      display:block;
      margin-bottom:8px;
      color:var(--brand-dark);
    }
    .cta-band {
      background:linear-gradient(135deg,#0b5cab 0%, #083d74 100%);
      color:#fff;
      border-radius:18px;
      padding:28px;
      margin-top:36px;
    }
    .cta-band h2, .cta-band p { color:#fff; }
    .cta-links {
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-top:16px;
    }
    .btn {
      display:inline-block;
      padding:12px 16px;
      border-radius:999px;
      font-weight:700;
      text-decoration:none;
      border:1px solid rgba(255,255,255,.35);
    }
    .btn.primary {
      background:#fff;
      color:var(--brand-dark);
    }
    .btn.secondary {
      color:#fff;
      background:rgba(255,255,255,.08);
    }
    .note {
      font-size:14px;
      color:var(--muted);
      background:#fff8eb;
      border:1px solid #f3dfb5;
      border-radius:14px;
      padding:14px 16px;
      margin:20px 0 0;
    }
    .faq {
      border-top:1px solid var(--line);
      margin-top:34px;
      padding-top:18px;
    }
    .faq-item {
      border:1px solid var(--line);
      border-radius:14px;
      padding:16px 18px;
      margin:12px 0;
      background:#fff;
    }
    .faq-item h3 { margin:0 0 8px; font-size:20px; }
    .sources {
      margin-top:28px;
      font-size:14px;
      color:var(--muted);
      border-top:1px solid var(--line);
      padding-top:16px;
    }
    @media (max-width: 820px) {
      .hero, .content { padding:24px; }
      h1 { font-size:32px; }
      h2 { font-size:26px; }
      .toc ul { columns:1; }
    }