:root{--bg: #f6f9ff;--surface: #ffffff;--text: #0f172a;--muted: rgba(15, 23, 42, .68);--line: rgba(15, 23, 42, .1);--primary: #1d4ed8;--primary2: #0ea5e9;--shadow: 0 16px 50px rgba(15, 23, 42, .1);--r: 18px}*{box-sizing:border-box}html,body{height:100%}body{margin:0;color:var(--text);font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial;background:linear-gradient(180deg,#ffffff 0%,var(--bg) 55%,#ffffff 100%)}a{color:inherit;text-decoration:none}code{padding:0 .35em;border-radius:10px;background:#1d4ed814;border:1px solid rgba(29,78,216,.16)}.page{min-height:100%}.container{max-width:980px;margin:0 auto;padding:0 16px}section[id],footer[id]{scroll-margin-top:72px}.banner{position:sticky;top:0;z-index:40;padding:10px 16px;font-size:13px;line-height:1.35;color:#854d0ef2;background:#fbbf242e;border-bottom:1px solid 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