更新图片后调整css

2020/tc/create-app/css/base.css

@@ -582,6 +582,7 @@ button {
  height: 260px;
  border-radius: 4px;
  background: url("../img/app-xtribe-st.png") center no-repeat;
  background-size: 100% 100%;
}
.app-template-item.active .app-template-screenshot {