修改

@@ -243,5 +243,5 @@ span.back_href {
 	left: 0;
 	top: 0;
 	display: none;
-	z-index: 5;
+	z-index: 6;
 }

@@ -62,7 +62,7 @@ body{
 .input_num{
 	width: 6.1rem;
 	height: 1rem;
-	background-color: #FFFFFF;
+	background-color: #fff;
 	margin: 0 auto;
 	border-radius: 0.2rem;
 	box-shadow: 0rem 0rem 0.4rem rgba(0,0,0,0.1) inset;