uniapp/unpackage/dist/dev/mp-weixin/pages/index/index.wxss

.content {
  display: flex;
  flex-direction: column;
  box-sizing: border-box;
  width: 100vw;
  height: 100vh;
}
.content .one {
  flex-grow: 1;
  text-align: center;
}
.content .one image {
  width: 50vw;
  height: 50vw;
  border-radius: 90%;
  box-shadow: 0 0 5px #f1f1f1;
  margin: 30vw 0 0 0;
}