文章翻页图片调用

<section class="overflow-hidden">
    <div class="container-full">
        <div class="row g-0">
            <div class="col-md-6">
                <a href="{:fun('content@prev_info',$info,'list')['url']}" class="card card-hover-reveal equal-lg-2-1 bg-black inverted">
                    <div class="card-wrap">
                        <div class="card-footer my-auto">
                            <div class="row justify-content-center align-items-center">
                                <div class="col-auto"><i class="bi bi-arrow-left fs-3"></i></div>
                                <div class="col col-xl-6">
                                    <h3 class="card-title">下一页:{:fun('content@prev_info',$info,'list')['title']}</h3>
                                </div>
                            </div>
                        </div>
                    </div>
                    <span class="background background-overlay" style="background-image: url('{:fun('content@prev_info',$info,'list')['picurl']}')">
            </span>
                </a>
            </div>
            <div class="col-md-6">
                <a href="{:fun('content@next_info',$info,'list')['url']}" class="card card-hover-reveal equal-lg-2-1 bg-black inverted">
                    <div class="card-wrap">
                        <div class="card-footer my-auto text-end">
                            <div class="row justify-content-center align-items-center">
                                <div class="col col-xl-6">
                                    <h3 class="card-title">下一页:{:fun('content@next_info',$info,'list')['title']}</h3>
                                </div>
                                <div class="col-auto"><i class="bi bi-arrow-right fs-3"></i></div>
                            </div>
                        </div>
                    </div>
                    <span class="background background-overlay" style="background-image: url('{:fun('content@next_info',$info,'list')['picurl']}')">
            </span>
                </a>
            </div>
        </div>
    </div>
</section>

我用上下页文章的缩略图作为翻页的底图

<span class="background background-overlay" style="background-image: url('{:fun('content@next_info',$info,'list')['picurl']}')">

这里链接调用的不是缩略图。

我采用了缩略图插件，想在上下页翻页底图里面调用说略图，应该如何调用呢？

直接把这个picurl替换成{:fun('Thumb@TT',$rs.picurl,475)}肯定不行。

这个如何解决，严重影响网页性能啊。