<!DOCTYPE html> <link rel="stylesheet" href="test-common.css"> <style type="text/css"> @counter-style a { system: extends upper-roman; prefix: "Chapter "; range: 1 5; } @counter-style b { system: extends a; prefix: "Section "; range: 1 6; } </style> <ol start="-2" style="list-style-type: a"> <li><li><li><li><li> <li><li><li><li><li> </ol> <ol start="-2" style="list-style-type: b"> <li><li><li><li><li> <li><li><li><li><li> </ol>