Django搭建网站二级目录内网页没有CSS样式求解决方式，djangocss,不是admin后台的样式

Django搭建网站二级目录内网页没有CSS样式求解决方式，djangocss,不是admin后台的样式

不是admin后台的样式（这个网上有解决问题）。
而是这样比如：abc.com/blog/create或abc.com/news/add这样在create和add页面中没有css样式，我觉得是urls.py的问题，但不知具体怎么错了，代码如下，有一个主目录urls.py，另外两个是blog和news应用下的urls.py文件

// 主目录的urls.pyfrom django.conf.urls import patterns, include, urlfrom django.contrib import adminfrom django.contrib.auth.views import login,logout     urlpatterns = patterns('',    # Examples:    url(r'^blog/', include('blog.urls')),    url(r'^news/',include('news.urls')),)//news/urls.pyfrom django.conf.urls import patterns, include, urlurlpatterns = patterns('news.views',    url(r'^$','news_list'),    url(r'add/$','add_news'),)//blog/urls.pyfrom django.conf.urls import patterns, include, urlfrom blog.views import create_topicurlpatterns = patterns('blog.views',    url(r'^$','topic_list'),    url(r'^create/$','create_topic'),)

编橙之家文章，