:root{--ink:#20262d;--muted:#6d7680;--paper:#fcfaf6;--card:#fff;--line:#e8e2d9;--accent:#a96038;--accent2:#607867;--soft:#f3ede4;--shadow:0 16px 45px rgba(67,52,38,.08)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.7 system-ui,-apple-system,"Microsoft YaHei",sans-serif}a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}.header{height:72px;display:flex;align-items:center;gap:30px;padding:0 max(4vw,24px);position:sticky;top:0;z-index:8;border-bottom:1px solid var(--line);background:rgba(252,250,246,.92);backdrop-filter:blur(16px)}.brand{font-size:20px;font-weight:850;white-space:nowrap}.header nav{display:flex;align-items:center;gap:8px;flex:1}.header nav a{display:flex;gap:6px;align-items:center;padding:8px 12px;border-radius:9px;color:var(--muted)}.header nav a.active,.header nav 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