头部样式修改

src/components/HeaderBack/style.module.scss

@@ -3,6 +3,7 @@
   position: fixed;
   z-index: 10;
   width: 100%;
+  max-width: 4.02rem;
   height: .44rem;
   background-color: #000;
   padding: 0 .14rem;
@@ -10,6 +11,7 @@
   transform: translateZ(0);
   display: flex;
   align-items: center;
+  justify-content: space-between;
 
   .iconfontIcon1 {
     color: #fff;