:root{--bg: #f5f7fa;--card: #ffffff;--ink: #111827;--sub: #566174;--muted: #8a95a7;--line: rgba(17, 24, 39, .1);--blue: #0f6bff;--blue-soft: #eaf2ff;--orange: #ff6b21;--orange-soft: #fff7ed;--purple: #5b5bd6;--green: #0f9f6e;--red: #dc2626;--steel: #dbe2eb;--shadow-sm: 0 1px 2px rgba(15, 23, 42, .05), 0 10px 26px rgba(15, 23, 42, .06);--shadow-lg: 0 22px 70px rgba(15, 23, 42, .13);font-family:Plus Jakarta Sans,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:var(--ink);background:var(--bg)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:linear-gradient(rgba(17,24,39,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(17,24,39,.035) 1px,transparent 1px),var(--bg);background-size:44px 44px}button,input,select,textarea{font-family:inherit}button,a{-webkit-tap-highlight-color:transparent}a{color:inherit;text-decoration:none}.site-header{position:sticky;top:0;z-index:20;height:72px;display:flex;align-items:center;gap:22px;padding:0 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