*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    :root {
      --navy: var(--nav-bg); --navy-mid: var(--border); --navy-light: var(--bg-elevated);
      --white: #ffffff; --off-white: #f5f7fa;
      --green: var(--accent); --green-dark: var(--accent-hover); --green-light: var(--accent-muted);
      --text: #1a1e2e; --text-muted: #5a6480; --border: #dce3ef;
      --shadow-sm: 0 1px 4px rgba(15,34,64,0.08);
      --radius: 8px; --radius-lg: 16px; --max-width: 800px;
      --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    }
    html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
    body { font-family: var(--font-sans); font-size: 1.05rem; line-height: 1.75; color: var(--text); background: var(--white); -webkit-font-smoothing: antialiased; }
    h1, h2, h3 { line-height: 1.2; font-weight: 700; color: var(--navy); }
    h1 { font-size: clamp(1.75rem, 4vw, 2.75rem); }
    h2 { font-size: clamp(1.35rem, 3vw, 1.85rem); margin-top: 2.5rem; margin-bottom: 0.75rem; }
    h3 { font-size: 1.15rem; margin-top: 1.75rem; margin-bottom: 0.5rem; }
    p { margin-bottom: 1.25em; }
    p:last-child { margin-bottom: 0; }
    a { color: var(--green-dark); text-decoration: underline; text-underline-offset: 3px; }
    a:hover { color: var(--green); }
    ul, ol { padding-left: 1.5rem; margin-bottom: 1.25em; }
    li { margin-bottom: 0.4em; }
    .container { width: 100%; max-width: 1100px; margin: 0 auto; padding: 0 1.25rem; }
    .article-container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 1.25rem; }
    .nav { position: sticky; top: 0; z-index: 100; background: var(--navy); border-bottom: 1px solid var(--navy-mid); padding: 1rem 0; }
    .nav-inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
    .nav-logo { font-size: 1.1rem; font-weight: 700; color: var(--white); text-decoration: none; white-space: nowrap; }
    .nav-logo span { color: var(--green); }
    .nav-links { display: flex; align-items: center; gap: 1.5rem; }
    .nav-links a { color: rgba(255,255,255,0.75); text-decoration: none; font-size: 0.9rem; font-weight: 500; }
    .nav-links a:hover { color: var(--white); }
    .nav-cta { background: var(--green); color: var(--white) !important; padding: 0.55rem 1.25rem; border-radius: var(--radius); font-weight: 600; transition: background 0.2s; }
    .nav-cta:hover { background: var(--green-dark) !important; }
    .article-hero { background: linear-gradient(135deg, var(--navy) 0%, var(--navy-mid) 60%, var(--navy-light) 100%); color: var(--white); padding: 4rem 0 3rem; position: relative; overflow: hidden; }
    .article-hero::before { content: ""; position: absolute; inset: 0; background: radial-gradient(ellipse at 70% 50%, rgba(30,64,175,0.08) 0%, transparent 60%); pointer-events: none; }
    .article-hero h1 { color: var(--white); margin-bottom: 1rem; position: relative; }
    .breadcrumb { font-size: 0.82rem; color: rgba(255,255,255,0.55); margin-bottom: 1rem; position: relative; }
    .breadcrumb a { color: rgba(255,255,255,0.65); text-decoration: none; }
    .article-meta { font-size: 0.88rem; color: rgba(255,255,255,0.6); position: relative; display: flex; gap: 1.25rem; flex-wrap: wrap; }
    .article-tag { background: rgba(30,64,175,0.2); color: var(--green); border: 1px solid rgba(30,64,175,0.3); border-radius: 100px; padding: 0.2rem 0.65rem; font-size: 0.78rem; font-weight: 600; }
    .article-body { padding: 3rem 0 4rem; }
    .control-box { background: var(--off-white); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.25rem 1.5rem; margin: 1rem 0; }
    .control-label { font-size: 0.78rem; font-weight: 800; letter-spacing: 0.1em; text-transform: uppercase; color: var(--green-dark); margin-bottom: 0.4rem; }
    .control-box h3 { margin-top: 0; font-size: 1rem; }
    .control-box p { margin: 0.4rem 0 0; color: var(--text-muted); font-size: 0.92rem; }
    .summary-table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; font-size: 0.92rem; }
    .summary-table th { background: var(--navy); color: var(--white); padding: 0.65rem 1rem; text-align: left; font-weight: 600; }
    .summary-table td { padding: 0.65rem 1rem; border-bottom: 1px solid var(--border); vertical-align: top; }
    .summary-table tr:last-child td { border-bottom: none; }
    .summary-table tr:nth-child(even) td { background: var(--off-white); }
    .cta-inline { background: var(--navy); color: var(--white); border-radius: var(--radius-lg); padding: 2rem; margin: 3rem 0; text-align: center; }
    .cta-inline h3 { color: var(--white); margin-bottom: 0.5rem; font-size: 1.15rem; }
    .cta-inline p { color: rgba(255,255,255,0.75); font-size: 0.95rem; margin-bottom: 1.25rem; }
    .btn-primary { display: inline-block; background: var(--green); color: var(--white); text-decoration: none; font-weight: 700; font-size: 1rem; padding: 0.75rem 1.75rem; border-radius: var(--radius); transition: background 0.2s; }
    .btn-primary:hover { background: var(--green-dark); color: var(--white); }
    @media (max-width: 560px) { .article-hero { padding: 2.5rem 0; } .summary-table { font-size: 0.82rem; } }
    .hamburger { display: none; align-items: center; justify-content: center; background: none; border: none; color: rgba(255,255,255,0.85); cursor: pointer; padding: 0.35rem; border-radius: 6px; }
    .hamburger svg { width: 22px; height: 22px; }
    .hamburger:hover { color: #fff; }
    .theme-toggle { background: none; border: none; color: rgba(255,255,255,0.7); cursor: pointer; padding: 0.35rem; display: flex; align-items: center; border-radius: 6px; }
    .theme-toggle svg { width: 18px; height: 18px; }
    .icon-sun { display: none; }
    [data-theme="dark"] .icon-moon { display: none; }
    [data-theme="dark"] .icon-sun { display: block; }
    .mobile-nav { display: none; flex-direction: column; background: var(--navy); border-top: 1px solid var(--navy-mid); padding: 1rem 1.5rem; }
    .mobile-nav.open { display: flex; }
    .mobile-nav-link { color: rgba(255,255,255,0.8); text-decoration: none; font-size: 0.95rem; font-weight: 500; padding: 0.65rem 0; border-bottom: 1px solid rgba(255,255,255,0.06); }
    .mobile-nav-link:last-of-type { border-bottom: none; }
    .mobile-nav-cta { display: inline-block; background: var(--green); color: #fff; text-align: center; text-decoration: none; font-weight: 600; font-size: 0.9rem; padding: 0.75rem 1.5rem; border-radius: 0.5rem; margin-top: 0.75rem; }
    @media (max-width: 760px) { .hamburger { display: flex; } .nav-links { display: none; } }