Multiple bug fixes

【Contents of the fix】
■Fixed a bug that the slider image for smartphones was not displayed when displayed on a smartphone.
■Fixed the aspect ratio of the thumbnails in the product list on the top page.

The following are the files that have been modified for this update.
【Corrected files】
header.php
index.php
style.css

For more information, please visit the download site for purchasers of Precious (tcd019).