:root{--font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;--mono: "SF Mono", "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;--r-xs: 4px;--r-sm: 6px;--r: 8px;--r-lg: 12px;--topbar-h: 52px;--bg: #f4f5f7;--surface: #ffffff;--surface-2: #f9fafb;--surface-3: #f1f3f5;--hover: rgba(15, 23, 42, .045);--press: rgba(15, 23, 42, .08);--border: #e4e7eb;--border-strong: #d2d6dc;--text: #111827;--text-2: #4b5563;--text-3: #8b93a1;--accent: #4f46e5;--accent-hover: #4338ca;--accent-soft: #eef0ff;--accent-text: #4338ca;--on-accent: #ffffff;--green: #059669;--green-soft: #e8f8f1;--amber: #b45309;--amber-soft: #fef6e4;--red: #dc2626;--red-soft: #fdeeee;--violet: #7c3aed;--violet-soft: #f3efff;--sky: #0369a1;--sky-soft: #e9f5fc;--focus: 0 0 0 3px rgba(79, 70, 229, .18);--shadow-sm: 0 1px 2px rgba(16, 24, 40, .05);--shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 4px 12px rgba(16, 24, 40, .06);--shadow-lg: 0 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