Did you see the above tip? "The font you select here appears on web pages and documents where no text font is specified." When writing web page code, programmers sometimes need to specify the font color, size, font style, etc. through HTML tags or CSS. If no font is specified or there is no specified font in your system, the browser will display it according to the settings shown in the figure. In addition, the system is a system and the browser is a browser. The two are separate and different.