* {
    margin: 0;
    padding: 0;
    box-sizing: border-box; 
  }
  
  .banner {
    background-color: #0047AB;
    color: white;
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding: 20px;
    width: 100%;
  } 
  
  .banner-text {
    font-size: 1.5rem;
    text-align: center;
  }
  
  .banner-button {
    background-color: white;
    color: #0047AB;
    border: none;
    padding: 15px 32px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 1rem;
    cursor: pointer;
  }
  
  /* 以下是响应式布局部分，可根据不同屏幕宽度调整样式 */
  @media screen and (max-width: 768px) {
   .banner {
      flex-direction: column;
    }
  
   .banner-text {
      margin-bottom: 15px;
    }
  }