There is a blank line at the top of the page body, which is ugly. This blank line can be selected and only empty things will be displayed in chrome_html/css_WEB-ITnose

The code is as follows:
http://my.csdn.net/my/code/detail/26149

Can you show me a line?

Reply to the discussion (solution)

Did you not set margin-top:0px; for the body??

bom problem
Use binary Open it to see what it is
Is there another
after the bom at the beginning of the file? If so, just delete everything in front of the second one

Bom problem
If so Just delete everything before the second one
Thank you very much.
There is really something "Lengmi" when I open it, but how is it generated? Because this is a dynamically generated web page, what should I do in php so that this "Lengmi" cannot be generated? Thank you