body {
      font-family: Source Han Sans;
      margin: 0;
      padding: 0;
      background-color: #fff;
  }

  .main {
      max-width: 1200px;
      margin: auto;
  }
.banner img{
	width:100%;
	height:auto;
}
  .title h3 {
      font-size: 38px;
      font-weight: bold;
      color: #000;
      margin: 40px auto 20px;
      text-align: center;
  }

  .img img {
      width: 100%;
      height: auto;
  }

  .text {
      margin: 40px auto;
  }

  .text p {
      font-weight: 400;
      font-size: 18px;
      line-height: 30px;
      color: #666666;
  }

  .text p span {
      font-weight: 700;
      color: #FF0000;
  }

  .video {
      position: relative;
      width: 100%;
      height: calc(56.25vw - 265.5px);
      min-height: 353.25px;
  }

  .video iframe {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      border: none;
  }

  .subtitle b {
      font-size: 30px;
      font-weight: bold;
      margin: 20px 0;
  }

  .end {
      position: relative;
  }

  .end img {
      width: 100%;
      height: auto;
  }

  .end .form {
      background-color: #fff;
      position: absolute;
      top: 10%;
      left: 60%;
      padding: 20px;
      border-radius: 12px;

  }