Thank you for your instruction,
I tried to follow your suggestion, and it’s the result.
https://anvil.works/build#clone:BQ5GZOOBHHGHK23A=6AHDIZZF2JMFXMKY3HYQP7D3
as you mentioned, I need to consider z-index, responsive action on smaller screen.
do you have any other instruction for the better look?
Anything is fine for me. it have been great help.
thank you again.