Stilizează primele 3 postări diferit și folosește o a 2-a buclă pentru restul postărilor / offset și paginare defecte

Mein Rat wäre, niemals query_posts zu verwenden. Nutzen Sie stattdessen eine benutzerdefinierte Abfrage oder den pre_get_posts-Hook für beide Fälle und stellen Sie sicher, dass Sie wp_reset_postdata nach Ihrer benutzerdefinierten Abfrage aufrufen.

ABER da Ihre Navigationsfunktion auf die global $wp_query verweist, müssten Sie query_posts verwenden und den paged-Parameter übergeben.

<?php get_header(); ?>

    <div class="row post-carousel">
        <?php
        $args = array(
            'posts_per_page' => '3',
        );

        $query = new WP_query ( $args );
        if ( $query->have_posts() ) { ?>

            <?php while ( $query->have_posts() ) : $query->the_post(); /* start the loop */ ?>

                <div class="col-xs-12 col-sm-4">
                    <article id="post-<?php the_ID(); ?>" <?php post_class( 'most-recent' ); ?>>
                        <?php if ( has_post_thumbnail() ) { ?>
                            <a href="<?php the_permalink(); ?>">
                                <div class="post-thumbnail-img"><?php the_post_thumbnail('index-carousel'); ?></div>

                            </a>
                        <?php } ?>
                        <?php the_title( sprintf( '<h2 class="entry-title"><a href="%s" rel="bookmark">', esc_url( get_permalink() ) ), '</a></h2>' ); ?>


                    </article><!-- #post-## -->
                </div>

            <?php // End the loop.
            endwhile;
            wp_reset_postdata();

        } ?>
    </div>

    <div class="row newsletter-container">
        <div class="newsletter col-sm-12 col-md-6">
            <p>Melden Sie sich für meinen Newsletter an, um alle neuesten Updates zu erhalten!</p>
        </div>
        <div class="newsletter col-sm-12 col-md-6">

            <!-- Begin MailChimp Signup Form -->
            <!-- code goes here -->
            <!--End mc_embed_signup-->

        </div>
    </div>


<?php
$paged = ( get_query_var('page') ) ? get_query_var('page') : 1;
$second_args = array(
    'posts_per_page' => 3,
    'offset' => 3,
    'paged' => $paged
);
query_posts($second_args);
if ( have_posts() ) : ?>

    <?php /* Start the Loop */ ?>
    <?php while ( have_posts() ) : the_post(); ?>

        <?php
        /* Include the Post-Format-specific template for the content.
         * If you want to overload this in a child theme then include a file
         * called content-___.php (where ___ is the Post Format name) and that will be used instead.
         */
        get_template_part( 'content', get_post_format() );
        ?>

    <?php endwhile; wp_reset_postdata(); ?>

    <?php _tk_content_nav( 'nav-below' ); ?>

<?php else : ?>

    <?php get_template_part( 'no-results', 'index' ); ?>

<?php endif; ?>

<?php get_footer(); ?>

S-ar putea să fie prea târziu, dar totuși cred că acest cod va funcționa pentru tine.

<?php
    if( !is_paged() ){ // Condiție pentru a verifica dacă este prima pagină a listei de bloguri, dacă da, atunci True
        $homepagePosts = new WP_Query(array( 'posts_per_page' => 3 )); // Condiție personalizată pentru a afișa doar postări recente
            while ($homepagePosts->have_posts()) {
                $homepagePosts->the_post(); ?>
                <div class="clearfix mt-4 mb-4 wrapper">
                    <div class="clearfix single-post">
                        <div class="fl single-post-img">
                            <div class="blogthumb">
                                <?php if (has_post_thumbnail( $post->ID ) ): ?>
                                    <?php $image = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), 'singplepost' ); ?>
                                    <a href="<?php the_permalink() ?>"><img src="<?php echo $image[0]; ?>" alt="<?php the_title(); ?>" title="<?php the_title(); ?>"></a>
                                <?php endif; ?>
                            </div>      
                        </div>
                        <div class="fl single-post-content">
                            <h2><a href="<?php the_permalink() ?>" rel="bookmark"><?php the_title(); ?></a></h2>
                            <span class="d-block position-relative mb-2"><?php echo wp_trim_words(get_the_excerpt(), 18); ?></span>
                            <span class="small" style="color:#888"><?php echo get_the_time('F jS, Y'); ?></span>
                        </div>      
                    </div>
                </div>
    <?php } wp_reset_postdata(); ?> 

<?php } ?>
<!-- O postare mare -->

<!-- Toate celelalte postări -->
<div class="clearfix wrapper">
    <div class="clearfix authorpostcontainer">
        <?php
        $current_page = get_query_var('paged');
        $current_page = max( 1, $current_page );
        $per_page = 9;
        $offset_start = 1;
        $offset = ( $current_page - 1 ) * $per_page + $offset_start;
        $post_list = new WP_Query(array(
            'posts_per_page' => $per_page,
            'paged'          => $current_page,
            'offset'         => $offset, // Începe cu a doua postare recentă.
        ));

        // Numărăm manual numărul de pagini, pentru că am folosit un OFFSET personalizat (adică
        // altul decât 0), așa că nu putem folosi simplu $post_list->max_num_pages sau chiar
        // $post_list->found_posts fără calcule suplimentare.
        $total_rows = max( 0, $post_list->found_posts - $offset_start );
        $total_pages = ceil( $total_rows / $per_page );

        if ( $post_list->have_posts() ):
            while ( $post_list->have_posts() ):
                $post_list->the_post();
        ?>
        <div class="one-third fl blogbox">
                <div class="blogthumb">
                    <?php if (has_post_thumbnail( $post->ID ) ): ?>
                        <?php $image = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), 'newpost' ); ?>
                        <a href="<?php the_permalink() ?>"><img src="<?php echo $image[0]; ?>" alt="<?php the_title(); ?>" title="<?php the_title(); ?>"></a>
                    <?php endif; ?>
                    </div>              
                    <div class="blogdetails">
                        <a href="<?php the_permalink() ?>" rel="bookmark" class="posttitle"><?php the_title(); ?></a>               
                        <span class="postdate"><?php echo get_the_time('F jS, Y'); ?></span><!--&nbsp;&nbsp;|&nbsp;&nbsp;<php $current_cat_id = the_category_ID(false); ?><a href='<php echo get_category_link($current_cat_id); ?>' class="catlink"><php echo get_cat_name($current_cat_id); ?></a-->
                    </div>              
                </div>
            <?php
            endwhile;
            endif;
            wp_reset_postdata();    
        ?>
    </div>  
</div>

<div class="clearfix wrapper mt-4 mb-4 text-center">
    <?php
        echo paginate_links( array(
            'total'   => $total_pages,
            'current' => $current_page,
        ) );
    ?>
</div>
<!-- Toate celelalte postări -->