compass 生成精灵图出错，有大神知道怎么回事吗？

webstorm 中利用 compass 生成精灵图

@import "compass/utilities/sprites"; @import "share/*.png"; @include all-share-sprites;

其中，第二步 @import "share/.png";报错， 错误信息“ error sass/stylesheet.scss (Line 30 of share/.png: Invalid CSS after " $share-little ": expected ":", was "plane-position:...")”