fix: timeline margin under mobile devices

source/css/_partial/timeline.styl

@@ -1,6 +1,10 @@
 .timeline-wrap
     border-left: 4px solid #e7e7e7
     margin: 40px 20px 40px 40px
+    @media mq-mini
+        margin: 40px 20px 40px 30px
+    @media mq-mobile
+        margin: 40px 20px 40px 30px
 
 .timeline-row
     clearfix()