:root{--primary:#1d4ed8;--primary-dark:#1e3a8a;--accent:#0ea5e9;--ink:#0f172a;--muted:#64748b;--line:#e2e8f0;--bg-soft:#f8fafc;--ok:#16a34a;--card-shadow:0 1px 3px rgba(15,23,42,0.08),0 4px 16px rgba(15,23,42,0.06)}*{box-sizing:border-box}html{-webkit-font-smoothing:antialiased}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.6}a{color:inherit;text-decoration:none}img{max-width:100%}.container{max-width:1120px;margin:0 auto;padding:0 24px}.site-header{border-bottom:1px solid var(--line);background:#fff;position:-webkit-sticky;position:sticky;top:0;z-index:50}.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}.brand{gap:10px;font-size:22px;letter-spacing:-.5px}.brand,.brand-mark{display:flex;align-items:center;font-weight:800}.brand-mark{width:34px;height:34px;border-radius:8px;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;justify-content:center;font-size:15px}.brand .tld{color:var(--primary)}.nav{display:flex;gap:28px;font-size:15px;font-weight:500}.nav a:hover{color:var(--primary)}.btn{display:inline-flex;align-items:center;gap:8px;justify-content:center;padding:10px 20px;border-radius:8px;font-weight:600;font-size:15px;border:1px solid transparent;cursor:pointer;transition:all .15s 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h1{font-size:28px}}