I installed a extension (bannerslider), all css seems placed in app/code/Magestore/Bannerslider/view/frontend/web/css
i had tried to delete all css in this folder then run
php bin/magento setup:static-content:deploy zh_Hant_TW
or
php bin/magento setup:static-content:deploy
but nothing were changed in frontend, anyone knows how to edit css of a extension?