Solving interface problems_html/css_WEB-ITnose

I’m a newbie! I copied someone else's interface and it went wrong in Internet Explorer, but it's aligned on Firefox. Is there any way? ? Since I didn’t write it myself, I don’t understand some of the css. Thank you in advance! ! ! Do I need to rewrite css?

Reply to the discussion (solution)

If it is not compatible, find the reason and then change it

Its source code is run through IE ?

To find out the problematic areas, it is recommended to use the troubleshooting method (make a backup before troubleshooting), delete the unaffected HTML first, leaving only the problematic areas

The poster's avatar matches the Wentan style, and he looks very tough

I eliminated the reasons step by step and finally got the answer