.wrapper span {
    position: fixed;
    width: 60px;
    height: 60px;
    bottom: -20px;
    animation: animate 10s linear infinite;
    z-index: -1;
  }
  
  .wrapper span:nth-child(1) {
    left: 6px;
    animation-delay: 0.6s;
  }
  
  .wrapper span:nth-child(2) {
    left: 10%;
    animation-delay: 3s;
  }
  
  .wrapper span:nth-child(3) {
    left: 20%;
    animation-delay: 2s;
  }
  
  .wrapper span:nth-child(4) {
    left: 30%;
    animation-delay: 5s;
  }
  
  .wrapper span:nth-child(5) {
    left: 40%;
    animation-delay: 1s;
  }
  
  .wrapper span:nth-child(6) {
    left: 50%;
    animation-delay: 7s;
  }
  
  .wrapper span:nth-child(7) {
    left: 60%;
    animation-delay: 6s;
  }
  
  .wrapper span:nth-child(8) {
    left: 70%;
    animation-delay: 8s;
  }
  
  .wrapper span:nth-child(9) {
    left: 80%;
    animation-delay: 6s;
  }
  
  .wrapper span:nth-child(10) {
    left: 90%;
    animation-delay: 4s;
  }
  
  @keyframes animate {
    0% {
      transform: translateY(0);
      opacity: 1
    }
  
    70% {
      opacity: .8;
    }
  
    100% {
      transform: translateY(-800px) rotate(360deg);
      opacity: 0
    }
  }
  body {
    background-color: #FBEEC9;
    position: relative;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
  }
  
  .content {
    flex: 1;
  }
  
  /* img {
  float: right;
  } */
  .noNewlineText {
    white-space: nowrap;
    /* 禁止换行 */
  }
  
  a.small {
    line-height: 0.8;
  }
  
  h1.bolder {
    font-weight: 900;
    /* Bolder */
  }
  
  .navbar {
    position: fixed !important;
  }
  
  .centered-text {
    text-align: center;
  }
  
  .centered-hr {
    height: 1px;
    background-color: black;
    width: 35%;
    margin: 0 auto;
  }
  
  .nav-pills .nav-link {
    width: 2px;
    padding: 5px;
    border-radius: 0px;
  }
  
  .nav-pills>.nav-link {
    color: #FAF0CA !important;
    background: #FAF0CA !important;
  }
  
  .nav-pills .nav-link.active,
  .nav-pills .show>.nav-link {
    color: #85540A !important;
    background: #F0A22E !important;
  }
  
  /* .banner {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    z-index: 1;
  }
  
  @media (max-width:800px) {
    .banner-area {
      min-height: 600px;
    }
  
    .banner-area h1 {
      font-size: 27px;
    }
  
    .banner-area h3 {
      font-size: 20px;
    }
  
    .banner-area a.banner-btn {
      padding: 8px 20px;
    }
  } */