body {
      font-family: Arial, sans-serif;
      display: flex;
      flex-direction: column;
      align-items: center;
      min-height: 100vh;
      margin: 0;
      padding: 20px;
      background-color: #1E9FFF;
    }

    .top-right {
      position: absolute;
      top: 20px;
      right: 200px;
      color: #ffffff;
        font-size: 20px;
    }

    .logout-btn {
      background-color: #ff5722;
      color: white;
      padding: 10px 10px;
      border: none;
      border-radius: 4px;
      cursor: pointer;
      text-decoration: none;
      margin-left: 10px;
        position: absolute;
        right: 30px;
    }

    .main-title {
      font-size: 24px;
      margin-top: 30px;
    }

    .service-boxes {
      display: flex;
      justify-content: space-between;
      margin-top: 20px;
      width: 80%;
    }

    .service-box {
      width: 600px;
      height: 600px;
      border: 3px solid #ccc;
      border-radius: 4px;
      text-align: center;
      padding: 50px;
      box-sizing: border-box;
        background-color: rgba(125, 177, 156, 0.87);
        position: relative;
         display: flex; /* 使用flex布局 */
      
    }

    .service-box h3 {
      margin-bottom: 0;
      position: absolute;
      top: 0;
      bottom: 0;
      left: 0;
      right: 0;
    }
     .service-box img {
      max-width: 60px;
      height: auto;
      display: block;
      margin: auto;
      position: absolute;
      top: 0;
      bottom: 0;
      left: 0;
      right: 0;
     }