<p style="font-size: 12px;color:#aaa;">版权引用：<a href="https://www.pexels.com/photo/high-angle-photo-of-spiral-staircase-3111252/"><span style="font-size: 12px;color:black;">“High Angle Photo of Spiral Staircase”</span> </a>由 <a href="https://www.pexels.com/@ksh2000"><span style="font-size: 12px;color:black;">ksh2000</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>