bulleted lists problem

Hello,
I have problem with the bulleted list in my web site http://www.saphonyx.be

My web site don’t display the list, and i wright these code in the css :

ul {
list-style-type: circle;
margin-left : 25px;
}

ol{
list-style-type: circle;
margin-left : 25px;
list-style-type: decimal;
}

the bulleted list work with this code, but now bulleted list appears all over. in the contact widget (in the footer) , in vertical menu ( http://www.saphonyx.be/nos-solutions/ii-par-gamme/par-gamme-bm/ (….

Please give me a good way to have my bulleted list without bug.
And if possible, witout writing a “class” in the texte editor, because my client cannot do that…
tanks very much…