function modify_pre_get_posts($query) {
    // 检查是否是主查询并且是首页或者分类页
    if (($query->is_home() || $query->is_category()) && $query->is_main_query()) {
        $sticky_posts = get_option('sticky_posts');
        $sticky_count = count($sticky_posts);
        $posts_per_page = 10; // 固定显示10篇文章

        if (!$query->is_paged()) {
            if ($sticky_count > 0) {
                // 第一页，减去置顶文章数量
                $query->set('posts_per_page', $posts_per_page - $sticky_count);
            } else {
                $query->set('posts_per_page', $posts_per_page);
            }
        } else {
            if (!empty($sticky_posts)) {
                $query->set('post__not_in', $sticky_posts);
                $offset = ($query->query_vars['paged'] - 1) * $posts_per_page - count($sticky_posts);
                $query->set('offset', $offset);
            }
        }
    }
}
add_action('pre_get_posts','modify_pre_get_posts');

function adjust_pagination() {
    if (is_home() || is_category()) {
        global $wp_query;
        $sticky_posts = get_option('sticky_posts');
        $sticky_count = count($sticky_posts);
        $posts_per_page = 10;

        // 获取非置顶文章总数
        $args = array(
            'post_type' => 'post',
            'post_status' => 'publish',
            'post__not_in' => $sticky_posts,
            'fields' => 'ids',
            'posts_per_page' => -1,
            'no_found_rows' => true,
        );
        $non_sticky_query = new WP_Query($args);
        $non_sticky_count = $non_sticky_query->post_count;

        // 第1页显示的普通文章数
        $first_page_posts = $posts_per_page - $sticky_count;

        // 剩余普通文章数
        $remaining_posts = $non_sticky_count - $first_page_posts;

        // 计算总页数：第1页 + 剩余页数
        if ($remaining_posts > 0) {
            $total_pages = 1 + ceil($remaining_posts / $posts_per_page);
        } else {
            $total_pages = 1;
        }

        $wp_query->max_num_pages = $total_pages;
    }
}
add_action('wp', 'adjust_pagination');