:root{--color-ink: #1b2733;--color-ink-soft: #3a4654;--color-muted: #6b7682;--color-faint: #95a0ab;--color-bg: #f6f5f1;--color-surface: #ffffff;--color-surface-2: #fbfaf7;--color-border: #e6e2d9;--color-rule: #d8d2c6;--color-accent: #0f766e;--color-accent-deep: #0a564f;--color-accent-weak: #e4efec;--color-accent-line: #bcdcd5;--font-serif: "Source Serif 4", Georgia, "Songti SC", "Noto Serif SC", "STSong", serif;--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;--fs-50: .75rem;--fs-100: .8125rem;--fs-200: .875rem;--fs-300: 1rem;--fs-400: 1.125rem;--fs-500: 1.3125rem;--fs-600: 1.625rem;--fs-700: 2.0625rem;--fs-800: 2.625rem;--fs-900: 3.25rem;--lh-tight: 1.15;--lh-heading: 1.3;--lh-latin: 1.6;--lh-cjk: 1.85;--tracking-kicker: .16em;--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;--space-11: 5rem;--space-12: 6rem;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--radius-pill: 999px;--shadow-sm: 0 1px 2px rgba(27, 39, 51, .04);--shadow-md: 0 10px 30px rgba(27, 39, 51, .08);--container: 1120px;--container-narrow: 760px;--measure: 68ch;--ease: cubic-bezier(.2, .6, .2, 1);--dur: .22s;--brand: var(--color-accent);--ink: var(--color-ink);--muted: var(--color-muted);--bg: var(--color-bg);--card: var(--color-surface);--border: var(--color-border)}