Apex domains cannot have CNAME records.
Question and response
Question
dig IT-LITE.RU. NS
Answer
IT-LITE.RU. 5 NS ns2.IT-LITE.RU.
IT-LITE.RU. 5 NS ns5.IT-LITE.RU.
IT-LITE.RU. 5 NS ns1.IT-LITE.RU.
IT-LITE.RU. 5 NS ns3.IT-LITE.RU.
IT-LITE.RU. 5 NS ns4.IT-LITE.RU.
Authority
The response has no authority records.
Additional
ns1.it-lite.RU. 5 A 91.218.248.170
ns2.it-lite.RU. 5 A 91.218.251.3
ns3.it-lite.ru. 5 A 91.218.250.39
ns5.IT-LITE.RU. 5 A 91.218.249.200
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0