Url rewriting web.config不包括css、js文件夹

这个web.config适用于我的php网站。但是css和js文件夹不包括。为什么?

<?xml version="1.0" encoding="UTF-8"?>

<configuration>
    <system.webServer>
        <rewrite>
            <rules>
            <rule name="rule 1D" stopProcessing="true">
                <match url="^article-detail/([0-9a-zA-Z-_]+)/([0-9]+)$" ignoreCase="false" />
                <action type="Rewrite" url="/article-detail.php?sef={R:1}&amp;article_id={R:2}" />
            </rule>
            </rules>
        </rewrite> 

    </system.webServer>
</configuration>