增加yohood点击样式，code review by XWG

@@ -12,6 +12,16 @@
         border: none;
         border-bottom: 4px solid #fff;
     }
+
+    #yohood:active {
+        background-image: image-url('yohood-tapped.png');
+        background-color: rgba(255,255,255,.4);
+        border-bottom-color: #000;
+        .right-icon {
+            color: #000;
+        }
+    }
+
     .index-header {
         box-sizing: border-box;
         padding: 0 20rem / $pxConvertRem;