/* index style */
.header-bg {
	display: flex;
	justify-content: flex-end;
	align-items: end;
	flex-wrap: wrap;
	width: 100%;
	height: 120vw;
	background-repeat: no-repeat;
	background-position: top left;
	background-size: cover;
}

.header-title-wrap {
	flex-basis: 100%;
	display: flex;
	justify-content: flex-end;
	align-items: center;
	flex-wrap: wrap;
	padding: 0 0 5vw 0;
}

.header-title {
	flex-basis: 95%;
}

.header-title h1 {
	color: #004098;
	font-size: clamp(2rem, 0.818rem + 5.91vw, 5.25rem);
	font-weight: 900;
	text-align: right;
	text-shadow: 0 0 15px rgba(255, 255, 255, 0.5), 0 0 30px rgba(255, 255, 255, 0.5), 0 0 40px #fff
}

.header-subtitle {
	margin: .5rem 0;
	flex-basis: 90%;
}

.header-subtitle h2 {
	padding: .5rem 1.5rem;
	background-image: linear-gradient( to left, #004098, transparent );
	color: #fff;
	font-size: clamp(1.125rem, 0.716rem + 2.05vw, 2.25rem);
	font-weight: 400;
	text-align: right;
	text-shadow: 2px 2px 3px rgba(0, 0, 0, 0.45);
}

.header-logo {
	flex-basis: 100%;
	margin: 0 0 5vw 0;
	text-align: center;
}

.header-logo img {
	max-width: 80%;
}

.course-bg.index {
	margin: -3vw 0 0;
	padding: 10vw 0 0;
}

.swiper-slide {
	box-sizing: border-box;
	aspect-ratio: 16/9;
}
.swiper-slide img {
	max-width: 100%;
	height: auto;
}

.main_Visual {
	position: relative;
	width: 100%;
	height: 75.4vw;
	padding: 1.5vw;
}

.title {
	position: relative;
	margin: 0 0 7vw 0;
	padding: 0;
}

.title .title_header {
	margin-bottom: 7vw;
	padding: 2.5vw 0;
}

.title p {
	font-size: clamp(0.938rem, 0.642rem + 1.48vw, 1.75rem);
	text-align: center;
	line-height: 2.9;
}

.title .title_header h2 {
	font-size: clamp(1.313rem, 0.699rem + 3.07vw, 3rem);
	text-align: center;
}

.title .title_header p {
	font-size: clamp(1rem, 0.591rem + 2.05vw, 2.125rem);
	text-align: center;
	line-height: 2.5em;
}

.img_bg {
	height: 75.4vw;
	background-image: url(../img/index/sp_img_bg.jpg);
	background-image: image-set(url(../img/index/sp_img_bg.jpg) 1x, url(../img/index/sp_img_bg@2x.jpg) 2x);
	background-image: -webkit-image-set(url(../img/index/sp_img_bg.jpg) 1x, url(../img/index/sp_img_bg@2x.jpg) 2x);
	background-position: center center;
	background-repeat: no-repeat;
	background-size: cover;
}

.main_text {
	position: relative;
	margin: 2.5vw 0;
	padding: 2.5vw;
}

.main_text p {
	margin: 0 0 5vw 0;
	font-size: clamp(0.938rem, 0.642rem + 1.48vw, 1.75rem);
	text-align: center;
	line-height: 2.5em;
}

.company {
	/* margin-bottom: 5vw; */
	padding: 5vw 0;
	background-color: #fff;
	text-align: center;
}

.company h3 {
	margin-bottom: 5vw;
	font-size: clamp(0.938rem, 0.506rem + 2.16vw, 2.125rem);
	line-height: 2.2em;
}

.company .logo_bg {
	position: relative;
	display: block;
	max-width: 40%;
	margin: 0 auto;	
	padding: 2vw 3vw;
	text-align: center;
}

.company .logo_bg a {
	position: relative;
	display: block;
}

.company .log_bg img[src*='.svg'] {
	max-width: 100%;
}

.sponsor {
	padding: 4.5vw 2.5vw;
	background-color: #E6F1F4;
	text-align: center;
}

.sponsor_header {
	margin: 0 0 7vw 0;
}

.sponsor .sponsor_header h2 {
	font-size: clamp(2rem, 1.273rem + 3.64vw, 4rem);
	text-align: center;
}

.sponsor .sponsor_header h3 {
	font-size: clamp(1.5rem, 1.136rem + 1.82vw, 2.5rem);
	text-align: center;
}

.sponsor .sponsor_content {
	margin-bottom: 8vw;
}

.sponsor .sponsor_content h3 {
	font-size: clamp(1rem, 0.727rem + 1.36vw, 1.75rem);
}

.sponsor .sponsor_content img {
	width: 100%;
	max-width: 90%;
}

/* .sponsor .sponsor_content:nth-last-of-type(2) img {
	max-width: 100%;
} */

.sponsor .sponsor_content a {
	position: relative;
	display: block;
	width: 100%;
	max-width: 100%;
	height: auto;
	margin: 0 auto;
}

.sponsor .sponsor_content:nth-of-type(2) a {
	max-width: 40%;
}

.about {
	position: relative;
	padding: 3.5vw 2.5vw;
}

.about_text {
	margin: 4vw 0 10vw;
}

.about_text h3 {
	font-size: clamp(1.313rem, 0.835rem + 2.39vw, 2.625rem);
	text-align: center;
}

.about_text h4 {
	margin-bottom: 1.5em;
	font-size: clamp(0.938rem, 0.506rem + 2.16vw, 2.125rem);
	text-align: center;
}

.about_text p {
	font-size: clamp(0.938rem, 0.506rem + 2.16vw, 2.125rem);
	text-align: center;
	line-height: 1.5em;
}

.sdgs .sdgs_text {
	margin-bottom: 1em;
	font-size: clamp(0.875rem, 0.648rem + 1.14vw, 1.5rem);
	text-align: center;
}

.sdgs .sdgs_img {
	text-align: center;
}

.sdgs .sdgs_img img {
	max-width: 90%;
}

@media screen and (min-width: 768px ) {
	.header-bg {
		align-items: center;
		width: 100%;
		height: 42vw;
		/* height: 56.25vw; */
		/* height: 100dvh !important; */
		background-repeat: no-repeat;
		background-position: top left;
		background-size: cover;
	}

	.header-title-wrap {
		flex-basis: 65%;
		margin: 0;
		padding: 5vw 0;
		align-items: center;
	}

	.header-title {
		flex-basis: 100%;
		display: flex;
		justify-content: center;
		align-items: center;
	}

	.header-title h1 {
		text-align: right;
		text-shadow: 2px 2px 3px rgba(0, 0, 0, 0.25);
	}

	.header-subtitle {
		flex-basis: 100%;
	}

	.header-subtitle h2 {
		text-align: center;
	}

	.header-logo {
		margin: 0;
	}

	.course-bg.index {
		margin: 0;
		padding: 5vw 0;
	}
	.title {
		position: relative;
		margin: 5vw 0;
		padding: 0;
	}
	
	.title .title_header {
		margin: 0 0 2.5vw 0;
		padding: 1.5vw 0;	
	}
	
	.title p {
		line-height: 3em;
	}
	.title .title_header p {
		line-height: 1.5em;
	}
	.img_bg {
		height: 62.5vw;
		background-image: url(../img/index/pc_img_bg.jpg);
		background-image: image-set(url(../img/index/pc_img_bg.jpg) 1x, url(../img/index/pc_img_bg@2x.jpg) 2x);
		background-image: -webkit-image-set(url(../img/index/pc_img_bg.jpg) 1x, url(../img/index/pc_img_bg@2x.jpg) 2x);
	}
	.main_text {
		margin: 0;
		padding: 3vw 1.5vw;
	}
	.main_text p {
		margin: 0 0 3vw 0;
	}
	.main_text p:last-of-type {
		margin: 0;
	}
	.company {
		padding: 2.5vw 0;
		text-align: center;
	}
	.company h3 {
		margin-bottom: 3vw;
		line-height: 2.2em;
	}
	.company .logo_bg {
		display: block;
		max-width: 25%;
		margin: 0 auto;	
		padding: 1vw 1.25vw;
	}
	.company .logo_bg a {
		position: relative;
		text-decoration: none;
		-webkit-transition: transform .5s cubic-bezier(.67,.31,.03,.9) .1s;
		transition: transform .5s cubic-bezier(.67,.31,.03,.9) .1s;
	}
	.company .logo_bg a:hover {
		transform: translateY(-5px);
	}
	.company .logo_bg img[src*='.svg'] {
		max-width: 80%;
	}
	.sponsor {
		padding: 5.5vw 2.5vw;
		background-color: #E6F1F4;
		text-align: center;
	}
	.sponsor_header {
		margin: 0 0 5vw 0;
	}
	.sponsor .sponsor_content_wrap {
		display: flex;
		justify-content: space-between;
		align-items: stretch;
		flex-wrap: wrap;
	}
	.sponsor .sponsor_content {
		flex-basis: 45%;
		display: flex;
		justify-content: center;
		align-items: center;
		margin-bottom: 4vw;
	}
	.sponsor .sponsor_content a {
		position: relative;
		display: block;
		width: 100%;
		max-width: 100%;
		height: auto;
	}
	.sponsor .sponsor_content:nth-of-type(2) a {
		max-width: 40%;
		margin: 0 auto;
	}
	.sponsor .sponsor_content a:hover {
		transform: translateY( -5px );
	}
	.sponsor .sponsor_content img {
		width: 100%;
		max-width: 100%;
	}
	/* .sponsor .sponsor_content:nth-of-type(2) img {
		width: 100%;
		max-width: 100%;
	} */
	.about {
		position: relative;
		padding: 3.5vw 2.5vw;
	}
	.about_text {
		margin: 4vw 0;
	}
	.about_text h4 {
		margin: 0 0 3vw 0;
	}
	.about_text p {
		line-height: 1.5em;
	}
	.sdgs {
		display: flex;
		justify-content: center;
		align-items: center;
		gap: 2%;
	}
	.sdgs .sdgs_text,
	.sdgs .sdgs_img {
		flex-basis: 50%;
	}
	.sdgs .sdgs_text {
		margin-bottom: 0;
		padding: 1.25vw;
		text-align: center;
		line-height: 1.5em;
	}
	.sdgs .sdgs_img {
		border-left: 1px solid #ccc;
		text-align: center;
	}
	.sdgs .sdgs_img img {
		max-width: 90%;
	}
}