:root{--bg: #f4efe6;--card: #fffdf8;--ink: #2b2420;--muted: #8a7f73;--line: #e6dccb;--accent: #b5452b;--accent-soft: #f6e3dc;--good: #3b8b5a;--warn: #c98a1a;--bad: #c0392b;--wood: #e9c58f;--wood-dark: #8b5a2b;font-family:PingFang SC,Microsoft YaHei,Noto Sans SC,system-ui,sans-serif;color:var(--ink);background:var(--bg)}*{box-sizing:border-box}body{margin:0;min-height:100vh}a{color:var(--accent);text-decoration:none}h1,h2,h3{margin:0 0 12px}h3{font-size:15px}.app{max-width:1240px;margin:0 auto;padding:0 20px 40px}.topbar{display:flex;align-items:center;justify-content:space-between;padding:16px 0}.brand{font-size:20px;font-weight:700;color:var(--ink)}.topbar nav{display:flex;gap:6px}.topbar nav a{padding:6px 14px;border-radius:999px;color:var(--muted)}.topbar nav a.active{background:var(--ink);color:#fff}.nav-btn{border:none;background:transparent;color:var(--muted);font:inherit;padding:6px 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