半夜三点还不能睡觉就为了弄 codeigniter 的路由区分二级列表页和一级内页的问题求帮忙::doge::

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二级列表首页
$route['([0-9a-zA-Z-]+)/([0-9a-zA-Z-]+)'] = 'category/clist/$1/$2';
/catea/cateb/
/catea/cateb

一级内页
$route['([0-9a-zA-Z-]+)/([0-9a-zA-Z-]+)'] = "article/view/$1/$2";
/cate/123
/cate/123.html
/cate/winter.html
/cate/winter-123abc.html

区分方法一
uri 末尾带 /的算列表首页
其他算内页

区分方法二
末尾带.html 的算内页
其他算列表首页

尝试过无效的代码如下
// $route['([0-9a-zA-Z-]+)/([0-9a-zA-Z-].html)'] = "article/view/$1/$2";
// $route['([0-9a-zA-Z-]+)/([0-9a-zA-Z-].)html'] = "article/view/$1/$2";
// $route['([0-9a-zA-Z-]+)/([0-9a-zA-Z-]).html'] = "article/view/$1/$2";
// $route['([0-9a-zA-Z-]+)/([0-9a-zA-Z-]).html'] = "article/view/$1/$2";
// $route['([0-9a-zA-Z-]+)/([0-9a-zA-Z-]+)/'] = 'category/clist/$1/$2';
// $route['([0-9a-zA-Z-]+)/([0-9a-zA-Z-]+)\/'] = 'category/clist/$1/$2';