Fixed bugs

【Contents of the correction】
■Changed the header image of the lower level page to parallax display when displayed on smartphones.

The following are the files that have been modified for this update.
【Modified file】
agent.css
content-page.php
content-pagenoside.php
page/template1.php
page/template2.php
page/template3.php
page/template4.php
single-staff.php
single.php
style.css