已知函数f(x)=2sin(2x+φ)(0<φ<2π)的图象过点(π2,﹣2).
(1)求φ的值;
(2)若f(α2)=65,﹣π2<α<0,求sin(2α﹣π6)的值.
(Ⅰ)A1C∥平面BDE;
(Ⅱ)平面A1AC⊥平面BDE.