【简单】给博客加个开学倒计时

<div class="countdown-content badg jb-yellow radius flex jc"><div class="countdown-desc">开学倒计时</div><div class="countdown-time flex0 em09-sm badg jb-vip2 radius" data-over-text="活动已结束" data-newtime="2022-7-01 00:00:00" data-countdown="09/01/2022 00:00:0"></div></div>

同款主题用户复制上方代码粘贴至你想要添加的位置，添加方法：无