Fixed on loading of top page slider and box

【Contents of the fix】
■Fixed an issue where the slider would sometimes display a box with a large overlap.

The files that have been modified for this update are as follows.
【Corrected files】
header.php
mobile/front-page.php
mobile/header.php
style-pc.css
style.css

For more information, please visit the download site for purchasers of LAW (tcd031).