Try to let your application.css just for 'require' purposes, it will pave your way to track errors as well as take advantage of Rails3 assets pipeline stack.
In your app/assets/stylesheets/application.css:
/*
* This is a manifest file that'll be compiled into application.css, which will include all the files
* listed below.
*
* Any CSS and SCSS file within this directory, lib/assets/stylesheets, vendor/assets/stylesheets,
* or vendor/assets/stylesheets of plugins, if any, can be referenced here using a relative path.
*
* You're free to add application-wide styles to this file and they'll appear at the top of the
* compiled file, but it's generally better to create a new file per style scope.
*
*= require_self
*= require bootstrap
*= require bootstrap_responsive
*= require my_styles
*/
In your app/assets/stylesheets/my_styles.css put the custom css that you have now in application.css.
That way your custom styles will be loaded after all the bootstrap stuff, overriding it.
To be honest I think that this is what is happening to you right now: it is not bootstrap.css what is overriding your styles, it is bootstrap_responsive as it is loaded after your styles.
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…