论坛切换到宽版，宽度修改

我知道在css里修改，但是不知道修改什么地方 ？、？？

1. 
   
2. /* 页面主区域 */
   
3. #ct { min-height: 300px; }
   
4. .ie6 #ct { height: 300px; }
   
5. .mn { overflow: hidden; }
   
6. .ct2 .mn { float: left; width: 700px; margin-bottom: 1em; }
   
7. .ct2 .sd { float: right; width: 250px; overflow: hidden; _overflow-y: visible; }
   
8. .appl { float: left; overflow: hidden; margin-bottom: 10px; padding: 6px 10px; width: 117px; }
   
9. .ct2_a, .ct3_a { border: 1px solid {WRAPBORDERCOLOR}; {SIDEBGCODE} }
   
10. .ct2_a_r { border: none; background-image: none; }
    
11. .ct2_a h1.mt { display: none; }
    
12. .ct2_a .tb { margin-top: 3px; }
    
13. .ct2_a .mn { float: right; width: 810px; }
    
14. .ct2_a .mn { display: inline; margin-right: 10px; padding-top: 10px; width: 800px; }
    
15. #nv_userapp .ct2_a .mn, .ct2_a_r .mn { margin-right: 0; width: 810px; }
    
16. .ct3_a .mn { float: left; margin-left: 20px; width: 565px; }
    
17. .ct3_a .sd { float: right; width: 220px; }
    
18. #nv_home .ct3_a .sd .bm { margin-right: 10px; border: none; }
    
19. #nv_home .ct3_a .sd .bm_c { padding: 10px 0; }
    
20. .mw { width: 100%; float: none; }
    
21. .mnw { clear: both; border-top: 1px solid #CCC; }
    
22. .mnh { width: 643px; background: {COMMONBG}; margin-bottom: 0; }
    
23. /* 页尾 */
    
24. #ft { padding: 10px 0 0px; border-top: 1px solid {COMMONBORDER}; line-height: 1.8; color: {FOOTERTEXT}; }
    
25. #flk { text-align: right; }
    
26. #flk img { vertical-align: middle; }
    
27. #scrolltop { visibility: hidden; position: fixed; bottom: 100px; display: block; margin: -30px 0 0; width: 26px; height: 50px; background: url({IMGDIR}/scrolltop.png) no-repeat 50% 0; line-height: 999px; overflow: hidden; cursor: pointer; }
    
28. .ie6 #scrolltop { position: absolute; bottom: auto; }
    
29. #nv_home #ft, .pg_announcement #ft, .pg_modcp #ft, .pg_portalcp #ft, .pg_ranklist #ft, #nv_userapp #ft { border-top: none; }

复制代码

试试看吧....

summer12369 发表于 2011-12-21 10:00
试试看吧....

是什么是，怎么修改呀
？？？