[css-fonts-4] Actually say what Fang Song is.

Author: svgeesus

css-fonts-4/Overview.bs

@@ -304,7 +304,9 @@ Generic font families</h4>
         <dd>
             Glyphs in cursive fonts generally use a more informal script style,
             and the result looks more like handwritten pen or brush writing than printed letterwork.
-            CSS uses the term "cursive" to apply to a font for any script,
+			For example, Kaiti (Chinese), which uses a brush-based style,
+			would be classified as a CSS ''cursive'' font family.
+			CSS uses the term "cursive" to apply to a font for any script,
             although other names such as Chancery, Brush, Swing and Script are also used in font names.
 
             <figure>
@@ -375,7 +377,13 @@ Generic font families</h4>
 
         <dt id="fangsong-def"><dfn>fangsong</dfn>
         <dd>
-            This font family is used for fang song typefaces in Chinese.
+			This font family is used for Fang Song typefaces in Chinese.
+			Fang Song is a relaxed, indermediate form
+			between Song (''serif'') and Kai (''cursive'').
+			Typically, the horizontal lines are tilted,
+			the endpoint flourishes are smaller,
+			and there is less variation in stroke width,
+			compared to a Song style.
     </dl>
 
 <h3 id="font-weight-prop">Font weight: the 'font-weight!!property' property</h3>