:root{--bg:#f7f8fb;--ink:#111827;--muted:#5f6b7a;--line:#d9dee7;--panel:#fff;--panel-strong:#eef2f7;--brand:#1677ff;--brand-dark:#0b4fb3;--ok:#0e9f6e;--warn:#b45309;--shadow:0 24px 80px #1118271f}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--bg);color:var(--ink);letter-spacing:0;margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;line-height:1.5}a{color:inherit;text-decoration:none}button,input,textarea{font:inherit}.site-shell{min-height:100vh}.nav{z-index:20;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);background:#f7f8fbe6;border-bottom:1px solid #d9dee7b3;justify-content:space-between;align-items:center;min-height:68px;padding:0 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