.maintext {
      width: 1200px;
      margin: 50px auto;
      padding-left: 300px;
      box-sizing: border-box;
  }
  
  .ititle {
      line-height: 1.8;
      padding-bottom: 100px;
      border-bottom: 1px solid #ccc;
  }
  
  .ittitle {
      font-size: 30px;
      letter-spacing: 3px;
  }
  
  .ittext {
      font-size: 16px;
      letter-spacing: 3px;
  }
  
  .ittext1 {
      font-size: 30px;
      letter-spacing: 3px;
  }
  
  .ictext1 {
      font-size: 16px;
      letter-spacing: 2px;
      line-height: 1.7;
      padding-bottom: 50px;
  }
  
  .issue {
      padding: 80px 0;
      padding-bottom: 50px;
      border-bottom: 1px solid #ccc;
  }
  
  .issueItem {
      margin-bottom: 50px;
  }
  
  .issueItemTitle {
      font-size: 20px;
      color: #72c69e;
      padding-bottom: 10px;
  }
  
  .issueItemText {
      font-size: 16px;
      letter-spacing: 1px;
      line-height: 1.5;
  }
  
  .knowTitle {
      font-size: 26px;
      font-weight: 700;
      color: #72c69e;
      padding: 40px 0;
      position: relative;
  }
  
  .knowTitle::after {
      content: "";
      width: 42px;
      height: 2px;
      background-color: #72c69e;
      position: absolute;
      left: 0px;
      bottom: 33px;
  }
  
  .knowList {
      line-height: 2;
  }
  
  .knowItem {
      font-size: 16px;
      height: 33px;
      display: flex;
      align-items: center;
  }
  
  .knowItem span {
      font-size: 32px;
      margin-right: 5px;
  }
  
  .achievementItem {
      font-size: 16px;
      margin-bottom: 5px;
      display: flex;
      align-items: center;
      height: 22px;
  }
  
  .achievementItem span {
      font-size: 30px;
      margin-right: 5px;
  }
  
  .know1 {
      margin-top: 50px;
      border-top: 1px solid #ccc;
  }