Kaamelot Maven Skin Plugin provides a dedicated Maven Skin for the Kaamelot sites, like one you read.
Insert the <skin> detailled below in you site.xml of Maven Site.
<skin> <groupId>fr.kaamelot.maven</groupId> <artifactId>kaamelot-maven-site-skin</artifactId> <version>1.0.0-SNAPSHOT</version> </skin>