:root{--color-paper: oklch(97.5% .008 110);--color-surface: oklch(99% .005 110);--color-sidebar: oklch(96% .012 110);--color-soft: oklch(94% .018 130);--color-ink: oklch(25% .016 145);--color-muted: oklch(46% .019 140);--color-rule: oklch(86% .015 130);--color-control: oklch(57% .028 145);--color-accent: oklch(40% .064 153);--color-accent-ink: oklch(99% .005 110);--color-focus: oklch(45% .095 153);--color-error: oklch(43% .14 30);--color-red: oklch(51% .14 32);--color-blue: oklch(47% .1 257);--font-display: "Palatino Linotype", "Songti SC", "STSong", "SimSun", serif;--font-body: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;--font-mono: "Cascadia Code", Consolas, monospace;--space-xs: .25rem;--space-sm: .5rem;--space-md: 1rem;--space-lg: 1.5rem;--space-xl: 2rem;--space-2xl: 3rem;--space-3xl: 4rem;--text-sm: .8125rem;--text-base: .9375rem;--text-lg: 1.125rem;--text-xl: 1.5rem;--text-display: clamp(2.25rem, 3.4vw, 3.5rem);--radius-sm: .375rem;--radius-md: .75rem;--ease-out: 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