/* CSS Document body { margin :0; background-image: url("images/fond_degrade.jpg"); background-repeat:repeat-x; } */
<style type="text/css">
<!--
.lien_historic01 {font-size: 11px; color: #666666}
.lien_historic02 {font-size: 11px; color: #FF6600}
.sommaire { font-size: 10px; font-family: Arial, Helvetica, sans-serif; font-weight: bold; color : #999999 }
.auteur {font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 11px; font-family: Arial, Helvetica, sans-serif; font-weight: normal }
.titre {font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 24px; font-family: Arial, Helvetica, sans-serif;  color: #663399}
.sous-titre {font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 24px; font-family: Arial, Helvetica, sans-serif;  color: #FF6600}
.chapeau { font-size: 13px; font-family: Arial, Helvetica, sans-serif; font-style: italic }
.txt { font-family: Arial, Helvetica, sans-serif; font-size: 12px }
.lettrine { font-size: 15px; font-family: Arial, Helvetica, sans-serif; font-weight: bold; color : #FF6600 }
.source { font-size: 10px; font-family: Arial, Helvetica, sans-serif; font-style: italic }
.source_title { font-size: 11px; font-weight: bold; font-style: normal; color : #9999CC; font-family: Arial, Helvetica, sans-serif }
.legend_photo {font-size: 10px; font-family: Arial, Helvetica, sans-serif; font-style: italic; color : #666666 }
</style>