RewriteEngine On

RewriteRule ^page/([0-9a-zA-Z-_/]+)/([0-9]+)/(.+)$ index.php?page=$1&elementId=$2 [L,QSA]
RewriteRule ^page/([0-9a-zA-Z-_/]+)$ index.php?page=$1 [L,QSA]

RewriteRule ^site-([0-9a-zA-Z-_]+)$ index.php?site=$1 [L,QSA]

RewriteRule ^([0-9a-zA-Z-_]+)/([0-9a-zA-Z-_]+)\.htm$ index.php?page=$2 [L,QSA]
RewriteRule ^([0-9a-zA-Z-_]+)\.htm$ index.php?page=$1 [L,QSA]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_URI} !=/favicon.ico
RewriteRule ^ index.php [L]