/* CSS Document */
  body {
      font-family: Arial, sans-serif;
      margin: 0;
	   padding-left: 5%;
      padding-right: 5%;
	 background-color: #DAD6D6;
    }
    .title_name {
      display: flex;
		   padding-left: 5%;
      height: 100px;
      background-color: #f2f2f2;
    }

    .text {
      padding: 20px;
      width: 50%;
    }

    .pictures {
	padding-left: 5%;
	padding-right: 5%;
    display:grid;
	grid-template-columns: repeat(4, 1fr);
    grid-gap: 10px; /* 可自行调整间距大小 */
	background-color: #FFFFFF;	
}

  .pictures img {
    width: 100%;
    height: auto;
  }

 .footer {
      position: fixed;
      left: 0;
      bottom: 0;
      width: 100%;
      height: 30px;
      background-color: #f2f2f2;
      text-align: center;
      padding-top: 15px;
      font-size: 14px;
      color: #666;
    }
.introduction,
.about,
.Data_declaration {
  display: flex;
  flex-direction: column;
		background-color: #FFFFFF;
	padding-left: 5%;
}
    .spacer {
      height: 100px;
			background-color: #FFFFFF;
    }