* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html,
body {
  background: #fff;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  display: flex;
  justify-content: center;
}

/* 宽度铺满浏览器，自适应缩放 */
.page {
  width: 100%;
  font-size: 0; /* 消除 img 之间的间隙，保证无缝拼接 */
}

.slice {
  display: block;
  width: 100%;
  height: auto;
}