1. I'm a top level heading (marked up as h1)
    1. I'm a second level heading (marked up as h2)
      1. I'm a third level heading (marked up as h3)
        1. I'm a fourth level heading (marked up as h4)
    2. I'm an h1 in level 1 section (so like an h2)
      1. I'm an h2 in level 1 section (so like an h3)
      2. I'm an h1 in level 2 section (so like an h3)
        1. I'm an h2 in level 2 section (so like an h4)