:root{--meta-blue: #1877F2;--meta-blue-hover: #166FE5;--meta-blue-light: #E7F3FF;--meta-blue-bg: rgba(24, 119, 242, .08);--bg-primary: #F0F2F5;--bg-secondary: #FFFFFF;--bg-card: #FFFFFF;--bg-card-hover: #F7F8FA;--bg-input: #F0F2F5;--bg-sidebar: #FFFFFF;--bg-header: #FFFFFF;--text-primary: #1C1E21;--text-secondary: #606770;--text-muted: #8A8D91;--text-link: #1877F2;--border-color: #DADDE1;--border-light: #E4E6EB;--border-focus: #1877F2;--success: #31A24C;--success-bg: #E6F7EC;--warning: #F0932B;--warning-bg: #FFF3E0;--danger: #E4405F;--danger-bg: #FDEEEF;--info: #1877F2;--info-bg: #E7F3FF;--radius-sm: 6px;--radius-md: 8px;--radius-lg: 10px;--radius-xl: 12px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .1);--shadow-md: 0 2px 8px rgba(0, 0, 0, .1);--shadow-lg: 0 4px 16px rgba(0, 0, 0, .12);--shadow-card: 0 1px 2px rgba(0, 0, 0, .1);--transition-fast: .15s ease;--transition-normal: .2s ease;--fb-primary: var(--meta-blue);--fb-primary-hover: var(--meta-blue-hover);--fb-primary-light: 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