:root{--bg: #f1f5f9;--card: #ffffff;--text: #0f172a;--muted: #64748b;--border: #e2e8f0;--accent: #4f46e5;--accent-soft: #eef2ff;--danger: #ef4444;--radius: 16px;--shadow: 0 1px 3px rgba(15, 23, 42, .08), 0 8px 24px rgba(15, 23, 42, .06)}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}button{font-family:inherit;cursor:pointer}input,select{font-family:inherit}.topbar{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;padding:12px 20px;background:#ffffffd9;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}.brand{border:0;background:none;font-size:18px;font-weight:700;color:var(--text)}.topbar-right{display:flex;align-items:center;gap:12px}.date{color:var(--muted);font-size:14px}.ghost{border:1px solid 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