TTF 转 WOFF2
WOFF2 比 WOFF 把 TTF 压得更小，是当下每款主流浏览器都优先支持的网页字体格式——下载更小，页面更快。
来自
To
TTF
The classic TrueType font. Installs on any system and works in nearly every app — the safest all-round font format.
WOFF2
The modern web font standard. Noticeably smaller than WOFF and the format every current browser prefers.