Counter Increment

increment.css

//A way to number sections and sub-sections with "Section 1", "1.1", "1.2", etc.:

body { 
  counter-reset:section;
}
h1 { 
  counter-reset:subsection;
}
h1:before {
  counter-increment:section;
  content:"Section " counter(section) ". ";
}
h2:before {
  counter-increment:subsection;
  content:counter(section) "." counter(subsection) " ";
}