function provexa_assets() {
    wp_enqueue_style('theme-style', get_stylesheet_uri());
}
add_action('wp_enqueue_scripts', 'provexa_assets');<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="https://provexa.blackmagazine.de/wp-sitemap-index.xsl" ?>
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