Hi,
The product page has a lot of "div" with "class" or "id".
You will find for example: "div.hikashop_product_page" or "div.hikashop.product_top_part".
I recommend you to use features of Firefox or Google Chrome in order to find which "class" and "id" you want to customize.
Otherwise, you can edit the product show view in order to add or change classes.
www.hikashop.com/fr/support/documentatio...op-view-listing.html
Just edit "product / show_default" (or "product / show" if you don't have HikaShop 1.5.6 or never) of your current front-end template.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.