<p style="font-size: 12px;color:#aaa;">版权引用：<a href="https://www.pexels.com/photo/black-metal-spiral-staircase-in-building-3847484/"><span style="font-size: 12px;color:black;">“ This photo is about steps, street, urban”</span> </a>由 <a href="https://www.pexels.com/@alexandre-mertens-2123167"><span style="font-size: 12px;color:black;">Alexandre Mertens </span></a> 授权许可 <span><a href="https://www.pexels.com/photo-license/" target="_blank" style="font-size: 12px;color:black;">Pexels License<img src="" style="display: inline-block;height: 16px;width: auto;"></a></span></p>