I need your help on format and styling stuffs

a/ This just means you need to add the correct URL to the image.

b/ Here's what I see now: https://screencast.com/t/rHKiXPUNB

Are you wanting more or less space?

a/ I know where is the cause of this issue and it's fixed.

b/ All good except go-back-home icon on menu. It put on the border of left margin. Therefore, I tried to add more margin-left: 20px, but I found that I put it on wrong place. I can fix it now.

Thanks Tom.

No problem :)