修改过期时间

 .pic {
 .pic {
-  position: absolute;
-  top: 50%;
-  left: 0;
-  transform: translate(0, -50%);
+  width:100%;
   padding: 0 0.32rem;
   padding: 0 0.32rem;
   box-sizing: border-box;
   box-sizing: border-box;
 }
 }