There are two methods can change it,sections and Assets,both of them can amend it.1.And section//contact-from.liquid//<div class="field"><inputtype="tel"id="ContactForm-phone"class="field__input"autocomplete="tel"name="contact[{{ 'templates.contact.f...

I located it at: Sections > header.liquid > line 320~340{by the way,I suppose that you must long header title...}藍

Very useful， thank you very much.