// ✨ 将这段魔法代码添加到主题的functions.php文件中
add_filter('get_avatar_url', function($url, $id_or_email){
    if(strpos($id_or_email, '@qq.com') !== false){
        $email = is_object($id_or_email) ? $id_or_email->comment_author_email : $id_or_email;
        $hash = md5(strtolower(trim($email)));
        return "https://cravatar.cn/avatar/{$hash}?d=identicon";
    }
    return $url;
}, 10, 2);

// 🖥️ 在用户资料页添加温馨提醒
add_action('show_user_profile', function($user){
    if(strpos($user->user_email, '@qq.com') !== false){
        echo '<div class="notice notice-warning"><p>🎯 请前往<a href="https://cravatar.com" target="_blank">Cravatar</a>上传头像以确保正常显示哦～</p></div>';
    }
});

// 💾 添加备用头像源
add_filter('avatar_defaults', function($avatars){
    $avatars['cravatar_default'] = 'Cravatar镜像 🔄';
    return $avatars;
});