:root{--bg:#0f1115;--bg-soft:#161922;--bg-elevated:#1c2029;--border:#262b36;--border-soft:#20242e;--text:#e8e6e1;--text-dim:#a6a49e;--text-faint:#6f6d68;--accent:#c9a267;--accent-soft:hsla(36,48%,60%,.12);--user-bubble:#232834;--danger:#d98a7b;--radius:16px;--maxw:760px;--font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;--font-serif:"Songti SC","STSong","Noto Serif SC",Georgia,serif}@media 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