.mobile_hidden {
	display: block;
}

.mobile_visible {
	display: none;
}

@media screen and (max-aspect-ratio: 9/15) {

	.mobile_hidden {
		display: none;
	}

	.mobile_visible {
		display: block;
	}

	.center {
		width: 100vw;
	}

	html {
		font-size: 2rem;
	}

	li {
		line-height: 1.5em;
	}

	#head_link {
		padding: 0.1rem;
		font-size: 0.3rem;
		display: none;
	}

	.head_link_element {
		font-size: 0.3rem;
	}

	#head_main {
		height: auto;
		width: 100vw;
	}
	
	#head_main_site_logo {
		height: 4.5rem;
		margin: auto 0.6rem;
	}

	#head_main_site_title {
		margin: 0.5rem 0;
	}

	#head_main_site_title_short {
		font-size: 2.8rem;
		font-weight: bold;
	}

	#head_main_site_title_full {
		font-size: 1.0rem;
		letter-spacing: -0.03rem;
	}
	
	#head_main_site_subtitle {
		font-size: 0.7rem;
	}

	#head_menu {
		height: auto;
		display: block;
	}

	#menu_top {
		padding: 0;
		font-size: 2.0rem;
		font-weight: bold;
		height: auto;
	}

	.head_menu_link {
		padding: 0.6rem;
		font-size: 1.5rem;
		letter-spacing: 0;
	}

	#content_head {
		margin-top: 3px;
	}

	.topPage_title {
		padding: 1.5rem !important;
	}

	.category_title {
		padding: 1.5rem;
		padding-bottom: 0;
		font-size: 2.0rem;
		font-weight: bold;
		line-height: 1.5em;
	}

	.content_title {
		padding: 1.5rem;
		padding-top: 1.2rem;
		font-size: 1.5rem;
		font-weight: bold;
		line-height: 1.5em;
	}

	#content_body {
		display: block;
	}

	#content_main {
		width: auto;
		padding: 0.01rem 0.8rem;
		padding-bottom: 3rem;
	}

	#content_main .section_title {
		text-align: start;
	}

	#content_main p {
		font-size: 0.8em;
	}

	#content_main li {
		text-align: start;
		font-size: 0.8em;
	}

	.section p {
		letter-spacing: 0;
	}
	.section_title {
		line-height: 1.5em;
	}
	.section_remark {
		margin:1.5em 0;
		font-size:1em;
	}

	.h1_level {
		margin-left: 0;
	}
	.h2_level {
		margin-left: 0;
	}
	.h3_level {
		margin-left: 0;
	}
	.h4_level {
		margin-left: 0;
	}

	#footer {
		font-size: 0.4rem;
	}
}