:root {
    
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    
    
    --color-primary: #6366f1; 
    --color-primary-hover: #4f46e5; 
    --color-secondary: #14b8a6; 
    --primary-rgb: 99, 102, 241; 
    
    
    --bg-body: #f8fafc; 
    --bg-surface: #ffffff;
    --bg-surface-hover: #f1f5f9; 
    
    
    --text-main: #334155; 
    --text-muted: #64748b; 
    --text-light: #94a3b8; 
    --text-on-primary: #ffffff;

    
    --border-color: #e2e8f0; 
    --border-focus: #6366f1;
    
    
    --color-success: #22c55e;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    
    
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-full: 9999px;
    
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    
    
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
}

[data-theme="dark"] {
    
    --bg-body: #0f172a; 
    --bg-surface: #1e293b; 
    --bg-surface-hover: #334155; 
    
    --text-main: #e2e8f0; 
    --text-muted: #94a3b8; 
    --text-light: #64748b; 
    
    --border-color: #334155; 
    --primary-rgb: 129, 140, 248; 
}