如题，

切换  晚上背景黑色，白天是白色

https://bolgk.eu.org/

  <div class="banner-wrap scenes-ready">
    <div id="stage">
      <div class="space" data-day-bg="https://bolgk.eu.org/templates/home/wanfeng-nav/images/day-sky.png" 
           data-night-bg="https://bolgk.eu.org/templates/home/wanfeng-nav/images/night-sky.png"></div>
      <div class="mountains">
        <div class="mountain mountain-1" data-day-color="#4a7c59" data-night-color="#1e3b2d"></div>
        <div class="mountain mountain-2" data-day-color="#3a6b4a" data-night-color="#152d20"></div>
        <div class="mountain mountain-3" data-day-color="#2a5a3a" data-night-color="#0c1f13"></div>
      </div>
      <div class="bear" data-day-filter="brightness(100%)" data-night-filter="brightness(30%)"></div>
    </div>