I redesigned the site and it fell a lot in the search results, why?

Question

Search Engine Optimization

Hello! The thing is - I had a one-page site on Wordpress. He took positions on key queries in Google and Yandex, everywhere, approximately, he was in the top five, but having made a site on pure html and css, uploading the site to the host, he just lost 5-7 positions in a few days! The question is, what could be? Either the site on html did not make up very well (although, that Google, that Yandex perceive it normally in various services for verification), or I don’t know what. The content of the main page was left unchanged, only a few new pages were added. Help. I don’t know what to do because I’m new to this business.
PS Please constructive criticism.
site address - xn------6cdbb3azdvbfjfjeedepxgkdiodhc9gqe5d5a2j.xn...

Answer 1

Maybe need a little more time than a few days (3-4 weeks).
Possibly problematic hosting if you changed it.
Did you change anything on the pages at all? Leave 1 h1:

Repair of washing machines at home in Krasnoyarsk! Inexpensive.
Master call phone

Answer 2

Hell
What is no longer fashionable, looks wild and better to remove
- shadows
- roundings
- both pictures on top
What to add
should be visible immediately without scrolling
- your face, the face of the masters, the appearance of the masters
- right below them, large, phone
- indicate the phone in such a format that in the mobile version you can click on it to make a call
- examples of work
- order in which you should ask for help
- cost of work
- terms
- what problems can indicate what and how much their solution will cost
- prevention
- mobile version - required
- choose the font and its size so that reading is not required
Read what https://ru.wikipedia.org/wiki/Schema.org
is