Multiple bug fixes

【Details of fixes】
■【Mac】Fixed a bug in which the thickness of Japanese and European text sometimes differed when using certain fonts.
■Fixed a bug in which the “Free Space” content on the top page did not become 100% width when displayed on a smartphone even if it was set to 100% width.

The following are the files that have been modified for this update.
【Modified file】
css/responsive.css
functions.php
functions/head.php
pagebuilder/assets/css/pagebuilder.css
style.css