gii的索引页面不能正常工作：缺乏CSS样式

Something wrong with index:

It doesn't work out. The success one is like this:

The config of nginx is right. So, why can't I see the page with correct css style?

I finally get the answer.The reason is something wrong with my nginx. nginx before:

location / {
    include fastcgi_params;
    fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
    fastcgi_pass 127.0.0.1:9000;
    #fastcgi_pass unix:/var/run/php5-fpm.sock;
    try_files $uri =404;
}

nginx now:

location / {
    # Redirect everything that isn't a real file to index.php
        try_files $uri $uri/ /index.php$is_args$args;
}
location ~ \.php$ {
    include fastcgi_params;
    fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
    fastcgi_pass 127.0.0.1:9000;
    #fastcgi_pass unix:/var/run/php5-fpm.sock;
    try_files $uri =404;
}

That's the reason! I didn't handle those static resources forwarding right.So, the js/css files are transmitted to fastcgi ,and then they are all changed to txt.

Thanks for all volunteers under this question!Both of you really do great help to me~~