add:新增一个中文官网返回顶部的功能

public/static/index/pc/css/public.css

@@ -156,6 +156,26 @@ div{
 #header{
     height: 60px;
 }
+.backtop {
+  position: fixed;
+  right: 1.25rem;
+  padding: 10px 5px;
+  bottom: 10%;
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  flex-direction: column;
+  color: #666;
+  font-size: 0.75rem;
+  background: #fff;
+  cursor: pointer;
+  border: 1px solid rgb(241, 241, 241);
+}
+.backtop .ictop {
+  height: 1.125rem;
+  width: 0.9375rem;
+  margin-bottom: 0.25rem;
+}
 /*屏幕兼容性*/
 @media screen and (min-width:150px) and (max-width:749px){
   body{