[TYPO3] Default sitemap problem

[LinTong]

Hallo everybody
 
I found that the default sitemap looks a little bit strange. the lower lever has a bigger font-size. e.g.
 
LEVEL1(small)
    level2 (larger)
    level2 (larger)
        level3  (much larger)
LEVEL1(small)
 
What should i do if i would like that the different lever has the same font-size? I found the default css for sitemap in the folder htdocs\typo3\css_styled_content\static\setup.txt. I tried to modify it but the style of the sitemap does not change. 
 
Thanks very much
 
 
 
 
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