Use a docinfo file to add the CSS to your list items.
myTest.adoc file
= Test Paragraphs
:icons: font
:docinfo1:
Test styling the following list:
. The first Paragraph
. The second paragraph
docinfo.html file
<style type="text/css">
ol {
counter-reset: item
}
li {
display: block
}
li:before {
content: "¶ " counter(item);
counter-increment: item
}
</style>