:root{--color-primary: #1E4DB7;--color-primary-light: #2D6BE0;--color-primary-dark: #153A8C;--color-primary-bg: #EEF2FB;--color-accent: #D4912E;--color-accent-light: #F5A623;--color-success: #10B981;--color-warning: #F59E0B;--color-danger: #EF4444;--color-info: #3B82F6;--color-bg: #F7F8FC;--color-surface: #FFFFFF;--color-border: #E5E7EC;--color-border-light: #F0F1F5;--color-text-primary: #1F2937;--color-text-secondary: #6B7280;--color-text-tertiary: #9CA3AF;--color-text-inverse: #FFFFFF;--tag-blue-bg: #EEF2FB;--tag-blue-text: #1E4DB7;--tag-gold-bg: #FEF3C7;--tag-gold-text: #B45309;--tag-green-bg: #D1FAE5;--tag-green-text: #065F46;--tag-gray-bg: #F3F4F6;--tag-gray-text: #4B5563;--font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "WenQuanYi Micro Hei", sans-serif;--font-mono: "JetBrains Mono", "Cascadia Code", "Fira Code", monospace;--font-h1: clamp(1.5rem, 2vw, 1.75rem);--font-h2: clamp(1.25rem, 1.5vw, 1.375rem);--font-h3: clamp(1rem, 1vw, 1.125rem);--font-h4: 1rem;--font-body-lg: 1rem;--font-body: .875rem;--font-body-sm: .8125rem;--font-caption: .75rem;--space-1: .25rem;--space-2: .5rem;--space-3: .75rem;--space-4: 1rem;--space-5: 1.25rem;--space-6: 1.5rem;--space-7: 2rem;--space-8: 2.5rem;--space-9: 3rem;--space-10: 4rem;--page-padding-x: clamp(1rem, 5vw, 4rem);--page-max-width: 80rem;--content-max-width: 75rem;--sidebar-width: clamp(12rem, 20vw, 16rem);--radius-sm: 4px;--radius-md: 6px;--radius-lg: 8px;--radius-xl: 12px;--radius-full: 9999px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .04);--shadow-md: 0 1px 3px rgba(0, 0, 0, .06), 0 1px 2px rgba(0, 0, 0, .04);--shadow-lg: 0 4px 16px rgba(0, 0, 0, .06), 0 2px 4px rgba(0, 0, 0, .03);--shadow-xl: 0 8px 32px rgba(0, 0, 0, .08), 0 2px 8px rgba(0, 0, 0, .04);--transition-fast: .15s ease;--transition-normal: .2s ease;--transition-slow: .3s ease;--bp-sm: 768px;--bp-md: 1024px;--bp-lg: 1280px;--bp-xl: 1600px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font-family)}