W3School TIY Editor

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial;
}

/* 网格：四个并排的相等列 */
.column {
  float: left;
  width: 25%;
  padding: 10px;
}

/* 设置网格内图像的样式 */
.column img {
  opacity: 0.8; 
  cursor: pointer; 
}

.column img:hover {
  opacity: 1;
}

/* 清除列后的浮动 */
.row:after {
  content: "";
  display: table;
  clear: both;
}

/* 展开的图像容器 */
.container {
  position: relative;
  display: none;
}

/* 展开的图像文本 */
#imgtext {
  position: absolute;
  bottom: 15px;
  left: 15px;
  color: white;
  font-size: 20px;
}

/* 图像内的可关闭按钮 */
.closebtn {
  position: absolute;
  top: 10px;
  right: 15px;
  color: white;
  font-size: 35px;
  cursor: pointer;
}
</style>
</head>
<body>

<div style="text-align:center">
  <h2>标签页式图片库</h2>
  <p>点击图像可展开：</p>
</div>

<div class="row">
  <div class="column">
    <img src="/i/photo/wuhan.jpg" alt="Wuhan" style="width:100%" onclick="myFunction(this);">
  </div>
  <div class="column">
    <img src="/i/photo/beijing.jpg" alt="Beijing" style="width:100%" onclick="myFunction(this);">
  </div>
  <div class="column">
    <img src="/i/photo/shenzhen.jpg" alt="Shenzhen" style="width:100%" onclick="myFunction(this);">
  </div>
  <div class="column">
    <img src="/i/photo/hangzhou.jpg" alt="Hangzhou" style="width:100%" onclick="myFunction(this);">
  </div>
</div>

</body>
</html>