:root{--brand:#184e57;--brand-ink:#fff;--ink:#202b29;--muted:#596760;--line:#dfe5df;--canvas:#f4f5ef;--paper:#fff;--soft:#eaf0e9;--site-width:1200px;--reading-width:740px;--radius:8px;--font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;--space-1:8px;--space-2:16px;--space-3:24px;--space-4:40px;--space-5:64px;--focus:2px solid currentColor}