/* ===== 基础样式 ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 微软雅黑, sans-serif;
}
body {
  background: #EDF5FF;
  padding-bottom: 80px;
}
.header {
  background: #1677FF;
  color: #fff;
  text-align: center;
  padding: 16px;
  font-size: 19px;
  font-weight: bold;
}
.page {
  display: none;
  padding: 10px 70px 80px !important; /* 左右内边距70px，让所有内容离边缘更远 */
}
.page.show {
  display: block;
}
/* 图片放大模态框 */
.image-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.9);
  z-index: 1000;
  justify-content: center;
  align-items: center;
}
.image-modal img {
  max-width: 90%;
  max-height: 90%;
  object-fit: contain;
}
.image-modal .close {
  position: absolute;
  top: 20px;
  right: 30px;
  color: #fff;
  font-size: 40px;
  cursor: pointer;
}