#n-accueil a { background: url(../../pictos_site/21/a1.gif); }
#n-principe a { background: url(../../pictos_site/21/a2.gif);}
#n-atouts a { background: url(../../pictos_site/21/a3.gif); }
#n-services a { background: url(../../pictos_site/21/a4.gif); background-position: left bottom;}
#n-quisommesnous a { background: url(../../pictos_site/21/a5.gif); }
#n-references a { background: url(../../pictos_site/21/a6.gif); }