#web_bg {
  transform: rotate(0deg) !important;
  background-image: url(https://cdn.mengze.vip/gh/ShiroRikka/picx-images-hosting@master/source/images/bg_rikka.3yepe4900b.webp);
  background-attachment: fixed;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  width: 100vw;
  height: 100vh;
  position: fixed;
  top: 0;
  left: 0;
}