.main_visual {  
	padding-top: 80px;
}
.main_visual img {
	width: 100vw;
	height:auto;
}

@media (max-width: 800px) {
  .main_visual img {
    max-height: 100%;
  }
}

#slideGalley{
    width: 100%;
    height: calc(100vw * 0.5);
    margin: 0 auto;
    overflow: hidden;
    position: relative;
}
#slide {
  width:9000px;

}
#slide li{
	float:left;
}
#nav{
	display: none;
}
#nav .prev{
	max-width: 80px;
	max-height: 80px;
	position: absolute;
	left:20px;
	top:50%;
	margin-top:-50px;
}
#nav .next{
	max-width: 80px;
	max-height: 80px;
	position: absolute;
	right:20px;
	top:50%;
	margin-top:-50px;
}