.corporate_visual_main{
    background-image: url(/corporate/alsok_guardsystem/alsok-g7_img_new/mv.jpg);
}

@media only screen and (max-width: 767.98px){
    .corporate_visual_main{
        background-image: url(/corporate/alsok_guardsystem/alsok-g7_img_new/mv_sp.jpg);
    }
}

.nav_long{
	width: 210px;
}

@media only screen and (max-width: 767.98px){
	.nav_long{
		width: auto;
	}
}