:root{--bg-page: #0f0f17;--bg-header: #16162a;--bg-input: #1c1c30;--bg-user: #2563eb;--bg-assistant: #1e1e33;--bg-code: #11111e;--bg-error: #2d1a1a;--text-primary: #e8e8f4;--text-secondary: #8888aa;--text-user: #ffffff;--text-hint: #55557a;--text-logo: #7c6ef0;--border-subtle: #2a2a45;--border-input: #3a3a5c;--border-input-focus: #5b5be0;--accent: #5b5be0;--accent-hover: #6f6fec;--danger: #e05b5b;--danger-hover: #ec7070;--radius-bubble: 18px;--radius-input: 12px;--radius-btn: 10px;--header-h: 56px;--footer-h: auto;--font-mono: "JetBrains Mono", "Fira Code", "Cascadia Code", "Consolas", monospace;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;overflow:hidden}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang TC,Noto Sans TC,Microsoft 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