reformat subsection

config/bind.sty

@@ -179,7 +179,12 @@ bookmarks=true]%
 {8pt}
 {\Large\bfseries\filcenter\fancyfont}
 
-\titleformat{\subsection}{\needspace{10em}\center\large\bfseries}{}{1em}{}[\rule{.9\linewidth}{.2pt}]
+\titleformat{\subsection}%
+	{\needspace{7em}\center\large\bfseries}%
+	{}%
+	{1em}%
+	{}%
+	[\rule{.9\linewidth}{.2pt}]
 %
 \titleformat{\subsubsection}
 {\needspace{3em}\normalfont\normalsize\bfseries}{\thesubsubsection}{1em}{}