:root{--bg-page: #F5F6F8;--bg-surface: #FFFFFF;--bg-surface-2: #F0F2F5;--bg-selected: #E8EFFF;--text-primary: #1F2328;--text-secondary: #4B5563;--text-muted: #8A94A6;--border-default: #E2E6EC;--border-divider: #EAECEF;--border-focus: #8AB4FF;--icon-default: #64748B;--accent-color: #3B82F6;--header-height: 60px;--sidebar-width: 220px;--radius: 12px;--gap: 16px;--shadow-sm: 0 2px 8px rgba(0, 0, 0, .04);--shadow-md: 0 4px 12px rgba(0, 0, 0, .06);--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif}:root[data-theme=dark]{--bg-page: #12171D;--bg-surface: #1E252E;--bg-surface-2: #28313B;--bg-selected: #2A3D56;--text-primary: #E8EBF0;--text-secondary: #A0A7B4;--text-muted: #6B7280;--border-default: #353D46;--border-divider: #2A323B;--border-focus: #496BAF;--icon-default: #7C8DA3;--accent-color: #60A5FA;--shadow-sm: 0 2px 8px rgba(0, 0, 0, .2);--shadow-md: 0 4px 12px rgba(0, 0, 0, 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