Hi,
I think you are using customized the css file of HikaShop (using the backend) so your customized CSS override the default CSS file.
The default HikaShop CSS file could have new rules and your overrided CSS would not be modified.
So you have to copy the new CSS rules in your custom CSS file.
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.