:root{--color-bg-root: #f3f4f6;--color-bg-sidebar: #ffffff;--color-bg-surface: #ffffff;--color-bg-hover: #f9fafb;--color-bg-active: #f3f4f6;--color-text-main: #111827;--color-text-muted: #6b7280;--color-border: #e5e7eb;--color-primary: #2563eb;--color-primary-hover: #1d4ed8;--color-danger: #ef4444;--color-danger-hover: #dc2626;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05);--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--font-sans: "Inter", "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, 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