Can't get the css to work in the child theme Evolve

Hi everybody,
I am trying to get the css in my child theme from the Evolve theme to work.
The author of the theme says he can’t help me.
I have this in the style.css of my child theme:

/*
Theme Name:     Evolve Child
Theme URI:      http://www.secretsistersblog.com/
Description:    Child Theme Evolve
Author:         Johanna Ouwerling
Author URI:     http://www.secretsistersblog.com
Template:       evolve
Version:        1.0
*/

@import url( '../evolve/style.css' );

Then I have placed the header.php, the functions.php, the content-blog.php, the index.php and the folder library in the child theme folder.
I changed all those files except the functions.php, but I thought the functions.php should be there too. Is that correct?

My main problem is, that I can’t get the files from the library folder to work. In it is an important css file. And my site doesn’t load that.
Should I include the path to this folder somewhere and where?

The js from the library folder isn’t working either, but I managed to get that to work by placing that folder directly in the child theme folder. Next to the index.php etc.

The only way I can get the css to work is when I insert it in the admin of the theme. The author created this possibility in the wp admin.
But I don’t know if when the author updates his theme, I loose all my changes.
I have the child theme activated now and it works alright.
I hope somebody understands what I am writing here.
My main question also is, how can I get the css inside the library folder to work?
My website is here:

http://www.secretsistersblog.com/

Johanna

http://wordpress.org/extend/plugins/child-themes/