:root{--font-ui:"Segoe UI Variable Text", "Segoe UI", "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", system-ui, sans-serif;--font-code:"Cascadia Code", Consolas, "Courier New", monospace;--font-print:"Songti SC", SimSun, serif;--font-handwriting-chinese:KaiTi, "Kaiti SC", STKaiti, "楷体", serif;--font-handwriting-fangsong:FangSong, STFangsong, "仿宋", serif;--font-handwriting-xingkai:STXingkai, "华文行楷", KaiTi, "Kaiti SC", serif;--font-handwriting-lishu:LiSu, STLiti, "隶书", serif;--font-handwriting-heiti:SimHei, "Heiti SC", "黑体", sans-serif;--font-handwriting-latin:"Segoe Print", "Bradley Hand", "Comic Sans MS", cursive;--font-size-caption:12px;--font-size-meta:13px;--font-size-control:14px;--font-size-body:15px;--font-size-emphasis:16px;--font-size-subtitle:18px;--font-size-section-title:20px;--font-size-panel-title:24px;--font-size-task-title:clamp(28px, 2.3vw, 32px);--font-size-page-title:clamp(32px, 3vw, 44px);--font-size-display-title:clamp(64px, 8vw, 112px);--font-weight-regular:400;--font-weight-medium:600;--font-weight-bold:700;--line-height-tight:1.25;--line-height-normal:1.6;--line-height-relaxed:1.75;font-family:var(--font-ui)}body,button,input,select,textarea{font-family:var(--font-ui)}button,input,select,textarea{font:inherit}code,kbd,pre,samp{font-family:var(--font-code)}