* {
  margin: 0;
  padding: 0;
}
body {
  background-image: url(/assent/images/bg.jpg);
  background-size: 100% 100%;
  height: 100vh;
}

.logo {
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 10;
}

.logo img {
  height: 64px;
  display: block;
}

/* 地图标签通用样式 */
.tag {
  position: fixed;
  z-index: 9;
}
.tag img {
  height: 14vh;
  display: block;
}

/* 位置根据参考图进行大致定位，可按需微调 */
.tag.lanzhou {
  top: 40%;
  left: 42%;
}

.tag.shanghai {
  top: 54%;
  left: 68%;
}