Style Field Label differently from Field Content

Hello, I have the below wpv-if code working just fine, but I cannot locate any documentation on how to style the field content differently from the field label. I'd like to keep the code I have and not hard code the labels themselves, so future changes are fool-proof.

[wpv-if field="wpcf-clinic-duration" evaluate="!empty($field)"]<strong>[types field="clinic-duration" show_name="true" separator=": "]</strong>[/types][/wpv-if]

Thanks in advance.
Matt