Conflicts between Custom theme CSS and Liferay CSS

[manni java，修改在9 年前。]

I am trying to customize the Liferay UI by using custom theme using base as as "_Styled" theme.

I have my own css files which I coped to _diff/css folder of theme and imported them "custom.css" file .However its breaking the presentation of liferay.In my custom CSS I have styles defined for all the standard tags like body,div etc which is impacting the liferay UI too.

How can I resolve this conflict? Thanks in advance!

[David H Nebinger，修改在9 年前。]

You assign portlet-specific classes to your html entities (i.e. through the liferay-portlet.xml file). That way you can narrow the CSS selectors so the styles only apply to your elements.

[manni java，修改在9 年前。]

Thanks for reply.I am adding all these portlets dynamically ,by specifying them in portal_normal.vm file. I do not have my custom portlet and hence do not have liferay-portlet.xml.

How can I specify styles for these kind of portlets?