Вид заголовка (выше) демонстрирует проблемы, возникающие если размеры в файле со стилями прописаны в абсолюных единицах - px, ex или em :(

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A B
C D

Содержание страницы

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Нумерованный список

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  3. List item 3
  4. List item 4

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