:root{--bg:#f6f8fa;--surface:#fff;--surface-alt:#f1f5f9;--surface-hover:#e9eef2;--border:#d8dee4;--border-soft:#e3e8ec;--text:#1f2937;--text-dim:#4b5563;--text-mute:#9ca3af;--accent:#2563eb;--accent-light:#dbeafe;--accent-dark:#1d4ed8;--accent-glow:#2563eb2e;--teal:#0891b2;--purple:#7c3aed;--green:#059669;--yellow:#d97706;--red:#dc2626;--pink:#db2777;--code-bg:#0f172a;--code-surface:#1e293b;--code-border:#334155;--radius:14px;--radius-sm:10px;--radius-xs:6px;--mono:"JetBrains Mono","SFMono-Regular","Fira Code",Consolas,"Liberation Mono",Menlo,monospace;--font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;--shadow-sm:0 1px 3px #0000000f;--shadow:0 2px 8px #00000014;--shadow-md:0 4px 16px #0000001a;--shadow-lg:0 8px 30px 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