[breaking change] rebuild style struct (#2021)

build/build-style.js

@@ -0,0 +1,16 @@
+const gulp = require('gulp');
+const less = require('gulp-less');
+const postcss = require('gulp-postcss');
+const cssmin = require('gulp-clean-css');
+
+// compile component css
+gulp.task('compile', () => {
+  return gulp
+    .src(['../es/**/*.less', '../lib/**/*.less'])
+    .pipe(less())
+    .pipe(postcss())
+    .pipe(cssmin())
+    .pipe(gulp.dest(file => file.base.replace('.less', '.css')));
+});
+
+gulp.task('default', ['compile']);