Hi,
CSS override are good too.
In HikaMarket, if you just have few override, you can use the section "styles" which will give you an empty CSS files.
Thanks to that, the "frontend" CSS can stay the official one and you won't have to "backport" the missing CSS rules in future updates when new CSS rules will be added into the 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.