:root{--bg:#f3f5f8;--card:#ffffff;--border:#e4e8ef;--text:#1c2733;--muted:#64748b;--primary:#1470b8;--primary-dark:#0f5a94;--primary-soft:#eaf3fa;--danger:#d92d20;--orange:#b45309;--green:#15803d;--shadow-sm:0 1px 2px rgba(16,24,40,0.05);--shadow-md:0 4px 16px rgba(16,24,40,0.08);--radius:10px}*{box-sizing:border-box}body,html{margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--text);font-size:15px;line-height:1.55;-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent}a{color:var(--primary);text-decoration:none}.btn:focus-visible,.input:focus-visible,.textarea:focus-visible,a:focus-visible,select:focus-visible{outline:2px solid var(--primary);outline-offset:2px}.container{max-width:760px;margin:0 auto;padding:20px 16px 32px}.header{background:var(--card);box-shadow:var(--shadow-sm);border-bottom:1px solid 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