:root{--bg:#f8fafc;--card:#fff;--ink:#0f172a;--muted:#64748b;--line:#e2e8f0;--brand:#0f766e;--brand2:#14b8a6;--soft:#ecfdf5;--radius:20px;--shadow:0 18px 45px rgba(15,23,42,.09)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6}.container{width:min(1120px,calc(100% - 36px));margin:auto}.site-header{position:sticky;top:0;z-index:50;background:rgba(248,250,252,.9);backdrop-filter:blur(14px);border-bottom:1px solid rgba(226,232,240,.8)}.nav-wrap{height:76px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink)}.brand-mark{display:grid;place-items:center;width:42px;height:42px;background:linear-gradient(135deg,var(--brand),var(--brand2));color:white;border-radius:13px;font-weight:800}.brand strong{display:block;line-height:1.1}.brand 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