Why can't I locate the index file on my homepage?

[willworkring]

There is a problem in the home page. The whole home page's margin shows：
.index-section {
margin-bottom: 0 !important;
}
.index-section {
margin-top: 0 !important;
}

I didn't add it and cannot find the right place. It shows on (index):4337. 

It is not in theme.css liquid and not in theme.liquid.

Where is it or how to fix this problem?

Anyone can help me?

The website is willworkjewelry.com

Thanks.

[alexpriftuli · Accepted solution]

Use an editor to search for it in all the files.

[willworkring]

Thank you.

Found it.