为什么此代码无法检索自定义帖子类型“graphic design”的帖子？

<?php
    $args = array( \'pagename\' => \'graphic-design\' );
    $query = new WP_Query($args);
    while ( $query->have_posts() ) : $query->the_post();
    ?>

        <div id="graphic-design" class="active page clearfix">

            <h3 class="subtitle"><?php the_title(); ?></h3>

            <?php
            $inner_args = array( \'post_type\' => \'graphic-design\' );
            $inner_query = new WP_Query( $inner_args );
            while ( $inner_query->have_posts() ) : $inner_query->the_post();
            ?>

                <div class="work">
                    <?php the_post_thumbnail(); ?>
                </div>

            <?php 
            endwhile;
            wp_reset_postdata();
            ?>

        </div>

    <?php 
    endwhile;
    wp_reset_postdata();
    ?>