.announcement-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
  }
  
  .back-button {
    background: none;
    border: none;
    color: #1890ff;
    font-size: 16px;
    cursor: pointer;
    margin-bottom: 20px;
  }
  
  .announcement-detail {
    background: white;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  }
  
  .announcement-header {
    border-bottom: 1px solid #f0f0f0;
    padding-bottom: 15px;
    margin-bottom: 20px;
  }
  
  .announcement-header h1 {
    margin: 0 0 10px 0;
    font-size: 24px;
  }
  
  .announcement-meta {
    display: flex;
    gap: 15px;
    color: #666;
    font-size: 14px;
    align-items: center;
  }
  
  .category-badge {
    background: #e6f7ff;
    color: #1890ff;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
  }
  
  .announcement-content {
    line-height: 1.8;
    font-size: 15px;
  }
  
  .announcement-content p {
    margin: 0 0 16px 0;
  }
  
  .error-message {
    text-align: center;
    padding: 50px;
    color: #ff4d4f;
    font-size: 16px;
  }