style:标准化响应式设计的词汇。

themes/grid/source/css/common.less

@@ -22,22 +22,22 @@
         baseline: baseline;
     }
     each(@main-axis-align, {
-        &.rx-@{key}-@{media} {
+        &.rm-@{key}-@{media} {
             justify-content: @value;
         }
-        &.cy-@{key}-@{media} {
+        &.cm-@{key}-@{media} {
             align-content: @value;
         }
     });
-    @aux-axis-align: {
+    @cross-axis-align: {
         start: flex-start;
         center: center;
         end: flex-end;
         stretch: stretch;
         baseline: baseline;
     }
-    each(@aux-axis-align, {
-        &.ry-@{key}-@{media} {
+    each(@cross-axis-align, {
+        &.rc-@{key}-@{media} {
             align-items: @value;
         }
         .as-@{key}-@{media} {