:root {
  color-scheme: light;
  --color-bg: #f6f8fb;
  --color-bg-strong: #edf2f7;
  --color-surface: #ffffff;
  --color-surface-muted: #f8fafc;
  --color-border: #dbe3ee;
  --color-border-strong: #8492a6;
  --color-text: #1f2937;
  --color-text-muted: #5b6879;
  --color-text-subtle: #667085;
  --color-primary: #fbe69c;
  --color-primary-soft: #fff7da;
  --color-primary-pressed: #efd47d;
  --color-primary-ink: #6b4e0c;
  --color-on-primary: #262318;
  --color-accent: #0f766e;
  --color-accent-hover: #0b5f59;
  --color-accent-soft: #e6fffb;
  --color-ai: #505aa3;
  --color-ai-soft: #eef0ff;
  --color-success: #24734f;
  --color-success-soft: #eaf8f0;
  --color-warning: #8a5207;
  --color-warning-soft: #fff6df;
  --color-danger: #b73540;
  --font-sans: Inter, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-md: 1rem;
  --text-lg: 1.25rem;
  --text-xl: 1.5rem;
  --text-2xl: 1.875rem;
  --text-hero: 2.5rem;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --shadow-sm: 0 1px 2px rgb(32 36 42 / 0.06);
  --shadow-md: 0 10px 30px rgb(32 36 42 / 0.08);
  --shadow-lg: 0 24px 60px rgb(32 36 42 / 0.14);
  --header-height: 4.5rem;
  --content-wide: 72rem;
  --content-prose: 48rem;
  --content-copy: 42rem;
  --focus-ring: 0 0 0 3px #fff, 0 0 0 6px #0f766e;
  --ease-standard: cubic-bezier(0.2, 0, 0, 1);
}