banner修正

style.scss

@@ -244,7 +244,7 @@ body {
     background-size: cover;
     background-repeat: no-repeat;
     background-position: center;
-    background-image: url(./img/banner/coverwebp.webp);
+    background-image: url(./img/banner/cover.png);
     position: relative;
     padding-bottom: 3vw;
     overflow: hidden;