The detail reason of suspending my site

You cannot create clones of sites like Facebook, Netlify, LinkedIn, or any other trademarked service as per Netlify’s Terms of Use

By posting and publishing your Content, you represent and warrant that your Content does not infringe, violate or misappropriate any third-party right, including any copyright, trademark, patent, trade secret, moral right, privacy right, right of publicity, or any other intellectual property or proprietary right or slander, defame or libel any third party.

See a list of posts regarding trademark take-downs: https://answers.netlify.com/search?q=trademark e.g.