#header{
    /*fixedで上部固定*/
	position: fixed;
	/* height: 70px; */
	/* width:100%; */
    z-index: 999;/*最前面へ*/
}

/*　上に上がる動き　*/
#header.UpMove{
	animation: UpAnime 0.5s forwards;
}
@keyframes UpAnime{
  from {
    opacity: 1;
	transform: translateY(0);
  }
  to {
    opacity: 0;
	transform: translateY(-100px);
  }
}

/*　下に下がる動き　*/
#header.DownMove{
	animation: DownAnime 0.5s forwards;
}
@keyframes DownAnime{
  from {
  	opacity: 0;
	transform: translateY(-100px);
  }
  to {
  	opacity: 1;
	transform: translateY(0);
  }
}