1. csscounterstylerule api: speakas

2. css at-rule: `@counter-style`: `speak-as`

3. css property: speak-as

4. css property: speak-as: digits

5. css property: speak-as: literal-punctuation

6. css property: speak-as: no-punctuation

7. css property: speak-as: normal

8. css property: speak-as: spell-out