小麦背景图覆盖

src/pages/WheatBg.js

@@ -2,7 +2,9 @@ import styled from 'styled-components';
 import bg from '../磷肥施用技术切图/默认状态/画面二-assets/背景.png';
 
 const Container = styled.div`
-  background: url(${bg}) no-repeat scroll center center;
+  background-image: url(${bg});
+  background-size: cover;
+  background-repeat: repeat;
   height: 100%;
   position: relative;
   display: flex;