Listar elementos de tipos de post personalizado en WordPress

<?php
$args = array(
    'post_type'=> 'slide',
    'order'    => 'ASC'
);

$the_query = new WP_Query( $args );
if($the_query->have_posts() ) :
    while ( $the_query->have_posts() ) :
        $the_query->the_post();
?>
<div class="swiper-slide" style="background-image: url(<?php echo get_template_directory_uri(); ?>/images/main-slider/slide-1.jpg);">
    <div class="content-outer">
        <div class="content-box">
            <div class="inner">
                <h1><?php echo get_the_title(); ?></h1>
                <div class="text"><?php echo get_the_excerpt(); ?></div>
                <?php ?>
                <div class="link-box">
                    <a href="#" class="theme-btn btn-style-one"><span>Leer más</span></a>
                </div>
                <?php ?>
            </div>
        </div>
    </div>
</div>
<?php
    endwhile;
    wp_reset_postdata();
else:
endif;
?>