uniapp/unpackage/dist/dev/mp-weixin/components/upload/index.wxss

.content {
  display: flex;
  flex-direction: column;
  box-sizing: border-box;
  width: 100vw;
  height: 100vh;
}
.upload {
  padding: 0 2vw;
}
.upload .upload_1 {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
}
.upload .upload_1 .list {
  position: relative;
  width: 30vw;
  height: 28vw;
  text-align: center;
  margin: 0 3vw 2vw 0;
  border-radius: 5px;
  box-shadow: 0 0 2px #858585;
}
.upload .upload_1 .list .image {
  width: 100%;
  height: 100%;
  border-radius: 5px;
}
.upload .upload_1 .list .add {
  position: relative;
  top: 20px;
}
.upload .upload_1 .list .del {
  position: absolute;
  right: 0;
  top: 0;
}
.upload .upload_1 .list:nth-child(3n) {
  margin: 0 0 2vw 0;
}