Steps: fix step last child style (#3690)
Steps: fix step last child style (#3690)


Kingwl/element,Leopoldthecoder/element-1,immissile/m-element,renxia/element,baiyaaaaa/element,iamnewsea/element-pzx,iamnewsea/element-pzx,ElemeFE/element,immissile/m-element,huguangju/element,JavascriptTips/element,Leopoldthecoder/element-1,JavascriptTips/element,huguangju/element,renxia/element,baiyaaaaa/element,Raganof/element,ElemeFE/element,Kingwl/element,Raganof/element