form {
      width: 100%;
      max-width: 600px;
      margin: 0 auto;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
  }

  .w100 {
      margin-top: 30px;
      width: 100%;
      display: flex;
      flex-wrap: wrap;
      grid-gap: 15px;
  }

  .w100 div {
      font-size: 16px;
  }

  form a {
      display: block;
      text-align: center;
      width: 50%;
      font-family: PuHuiTi75;
      font-size: 20px;
      margin: 0 auto;
  }

  form label {
      width: 100%;
      margin-bottom: 20px;
      display: flex;
      flex-direction: column;
  }

  form label.l50 {
      width: 45%;
  }

  form label span {
      font-size: 18px;
      line-height: 1;
      color: #1E1E1E;
      margin-bottom: 10px;
  }

  form label span sub {
      font-size: 18px;
      line-height: 1;
      color: #BF0000;
      bottom: 0;
  }

  form label small {
      color: #BF0000;
  }

  form input {
      height: 45px;
      border: 1px solid #9E9E9E;
      border-radius: 15px;
      padding: 0 15px;
      outline: none;
  }

  .code {
      width: 100%;
      position: relative;
      display: flex;
      align-items: flex-end;
  }

  .CodeInput {
      width: calc(100% - 120px);
      display: flex;
      flex-direction: column;
  }

  .CodeInput span {
      font-size: 18px;
      line-height: 1;
      color: #1E1E1E;
      margin-bottom: 10px;
  }

  .CodeImg {
      width: 120px;
      height: 45px;
  }

  .CodeImg img {
      height: 45px;
      width: 100%;
  }

  #regBtn {
      margin: 0 auto;
      margin-top: 20px;
      width: 45%;
      height: 50px;
      position: relative;
      z-index: 1;
      color: #fff;
      background: var(--color);
      border-radius: 50px;
      display: block;
  }



  .aa {
      margin-top: 15px;
      width: 100%;
      text-align: center;
  }


  @media screen and (max-width: 640px) {
      main {
          width: 90%;
          background-size: 100%;
          background-color: #fff;
      }

      form {
          padding: 45px 30px 30px;
      }

      main h2.title {
          font-size: 20px;
          width: 40%;
          height: 60px;
          border-radius: 20px 0px 30px;
          display: flex;
          align-items: center;
          justify-content: center;
      }

      main img.title {
          position: absolute;
          width: 40%;
          top: -10vw;
      }

      form input {
          height: 40px;
          border-radius: 10px;
          padding: 0 10px;
          outline: none;
          font-size: 10px;
      }

      .code {
          width: 100%;
      }

      .CodeImg img {
          height: 40px;
          width: 100%;
      }

      #regBtn {
          width: 100%;
      }
  }

  /* 登录成功 */
  .LoginSuccess .w100 {
      width: 100%;
      padding: 30px 0;
  }