Fixed multiple bugs

【Contents of the fix】
■Fixed a bug in which the date display setting of the custom post “Campaign” was not reflected on the top page.
■Fixed an issue where the layout of the category display section of the course archive page would sometimes be broken when viewed from a smartphone.
■Fixed a bug that unnecessary text may be displayed in the footer when viewed from a smartphone.
■Fixed a bug that the layout sometimes collapses in IE.
■Fix for PHP7 support.

The following are the files that have been modified for this update.
【Corrected files】
admin/theme-options.php
css/responsive.css
functions/seo.php
widget/ad.php
widget/archive_list.php
widget/banner_list.php
widget/campaign_list.php
widget/category_list.php
widget/course_list.php
widget/google_search.php
widget/news_list.php
widget/staff_list.php
widget/styled_post_list1.php
widget/voice_list.php
front-page.php
style.css

For more information, please visit the SKIN (tcd046) download site for purchasers.