body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 0;
        }
        
        header {
            background-color: #f5f5f5;
            padding: 10px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        header img.avatar {
            width: 150px;
            height: 150:px;
            border-radius: 5%;
        }
        
        .square-button {
            background-color: #ccc;
            color: #fff;
            border: none;
            padding: 10px 20px;
            border-radius: 4px;
            font-weight: bold;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
            cursor: pointer;
        }
        
        footer {
            background-color: #f5f5f5;
            padding: 10px;
            text-align: center;
        }
        
        .content {
            padding: 20px;
            }
          /* 主要内容样式 */
    .main-content {
      text-align: center;
      padding: 20px;
    }
    
    .video-container {
      position: relative;
      padding-bottom: 56.25%;
      height: 0;
      overflow: hidden;
    }
    
    .video-container video {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
    }
    
    /* 图片框样式 */
    .image-boxes {
      display: flex;
      justify-content: center;
      gap: 20px;
      padding: 20px;
    }
    
    .image-box {
      width: 150px;
      height: 80px;
      background-color: #f2f2f2;
      img {
      box-shadow: 0px 2px 4px rgba(0, 0, 0, 0.3);
      border-radius: 4px;
      border: 1px solid #ccc;
      margin: 5px;
    }