.main-background {
  background-image: url("/image/背景.jpg");
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center;
  background-attachment: fixed;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -10;
  overflow: scroll;
}

.is-flex {
  display: flex !important
}

.qr-code {
  width: 45%;
  position: absolute;
  top: 25%;
  left: 5%;
  z-index: 100;
}

.list {
  width: 500px;
  height: 350px;
  display: flex;
  background-color: rgba(233, 232, 232, .7);
  padding: 20px;
  border-radius: 10px;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.list-link {
  cursor: pointer;
  font-size: 18px;
  transition: all .25s ease;
  -webkit-transition: all .25s ease;
}

.list-link:hover {
  color: #1a88bf;
  text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.022);
}

.media-window {
  max-width: 1100px;
  border-radius: 20px;
  cursor: pointer;
}

.intro-video {
  border-radius: 10px;
}

.main {
  width: 1100px;
  min-height: 500px;
  background-color: rgba(233, 232, 232, .7);
  padding: 20px;
  border-radius: 10px;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.back-btn {
  float: right;
  padding: 1.25rem;
  cursor: pointer;
}