:root{--bg:#fbfcfa;--surface:#fff;--surface-soft:#eef5f1;--ink:#172728;--muted:#5a6764;--line:#d9e2de;--brand:#0f766e;--brand-dark:#115e59;--accent:#f59e0b;--accent-dark:#b45309;--shadow:0 18px 45px rgba(18,38,36,.12)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:Noto Sans TC,Microsoft JhengHei,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;line-height:1.7}a{color:inherit;text-decoration:none}img{display:block;max-width:100%}button,input{font:inherit}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.site-header{position:-webkit-sticky;position:sticky;top:0;z-index:50;display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:72px;padding:12px clamp(20px,5vw,72px);border-bottom:1px solid 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