checkout layout mess up

-- HikaShop version -- : 3.0.1
-- Joomla version -- : 3.6.5
-- Error-message(debug-mod must be tuned on) -- : checkout layout mess up

hai, my check out is mess up even i change to different template. please help.

Hello,

You're using HikaShop 3 new "add to cart" system but you're using the legacy checkout system.
Because of that, you need to also use the "legacy CSS" provided by the "style / default".
www.hikashop.com/support/documentation/5...fig.html#display_css

More about CSS and customization :
www.hikashop.com/support/documentation/1...the-display.html#css

Regards,