<p style="font-size: 12px;color:#aaa;">版权引用：<a href="https://pixabay.com/photos/stairs-steps-staircase-stairway-605156/"><span style="font-size: 12px;color:black;">“Stairs Steps Staircase”</span> </a>由 <a href="https://pixabay.com/users/kohnrebecca0-713067/"><span style="font-size: 12px;color:black;">kohnrebecca0</span></a> 授权许可 <span><a href="https://pixabay.com/zh/service/license/" target="_blank" style="font-size: 12px;color:black;">Pixabay License<img src="" style="display: inline-block;height: 16px;width: auto;"></a></span></p>