:root{--ink:#172f36;--muted:#64777a;--soft:#f2f6f4;--line:#dbe6e1;--accent:#ef6d45;--accent-dark:#c75032;--yellow:#f5c95b;--max:1120px;font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:#fbfcfa}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;line-height:1.65;background:radial-gradient(circle at 85% 0,#fff0dc 0,transparent 30%),#fbfcfa}a{color:inherit}site-header{}.site-header{width:min(calc(100% - 44px),var(--max));margin:auto;padding:22px 0;display:flex;align-items:center;justify-content:space-between;gap:28px}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:800;letter-spacing:-.02em}.brand-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:11px;background:var(--ink);color:#fff;font-weight:900}.site-header nav,.site-footer nav{display:flex;gap:22px;align-items:center;font-size:14px;color:var(--muted)}.site-header nav 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