.weixin {
    position: absolute;
    top: -80px;
    right: 0;
    width: 17rem;
    height: 30rem;
    margin-top: 2px;
    background: url(../images/img_sign.png) left top no-repeat;
    background-size: 100% 100%;
    z-index: 99;
  }

  html {
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
  }

  body, div {
    margin: 0;
    padding: 0;
  }

  .bn-rule {
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: #333;
  }

  .bn-rule img {
    margin-top: 21px;
    width: 100%;
  }

  .register-box-max {
    width: 80%;
    height: 280px;
    top: calc(50% - 140px);
    left: 10%;
    position: fixed;
    z-index: 10;
    background-color: #fff;
    border-radius: 10px;
  }
  
  @media screen and (min-width: 768px) {
    .register-box-max {
      width: 50%;
      left: 25%;
    }
  }

  .register-bg {
    width: 100%;
    height: inherit;
    position: fixed;
    background-color: #0a0a0a;
    opacity: 0.5;
  }

  .register-title-box {
    padding: 10px 10px;
    margin-top: 10px;
    text-align: center;
    font-size: 1.2rem;
  }

  .register-title-box span {
    font-weight: 600;
  }

  .register-input-box {
    text-align: center;
    font-size: 1rem;
  }

  .register-input-box input {
    width: calc(80% - 5px);
    height: 2rem;
    padding-left: 5px;
    margin-top: 10px;
    margin-bottom: 10px;
    border: 1px solid #6f6f6f;
    border-radius: 3px;
  }

  .register-btn-box {
    margin-top: 40px;
    text-align: center;
  }

  .register-btn-box button {
    width: 80%;
    height: 2.5rem;
    border: 0;
    border-radius: 18px;
    background-color: #1993ff;
    color: #fff;
    font-size: 1.1rem;
  }