.past h2:not(:first-child) {
	margin-top: 8em;
}
.past dl {
	line-height: 1.7em;
}
.past dt {
	font-size: .8em;
	color: hsl(337, 56%, 53%);
}
.past dd {
	margin: 0 0 .3em 0;
}
.past .note{
	color: #444;
	font-size: .8em;
	line-height: 1.7em;
}

.small {
	text-align: center;
	font-size: .8em;
	color: #666;
}


.top-message {
	color: hsl(115, 57%, 37%);
	font-weight: bold;
}

.top-image-container {
	width: 100%;
	margin: 3em 0;
}
.top-image-box {
	width: 90%;
	margin: 1em auto;
	border-radius: 1em;
	overflow: hidden;
	box-shadow: 0 0 2em #AAA;
}
.top-image-box img {
	width: 100%;
	vertical-align: bottom;
}

.past-outline h3 {
	margin: 1.5em 0 .5em 0;
}
.past-outline .number {
	font-size: 1.2em;
	color: hsl(337, 56%, 53%);
	font-weight: bold;
	text-align: center;
	margin-bottom: 1.5em;
}
.past-outline p {
	text-align: center;
}
.youtube-box {
	width: 100%;
	max-width: 400px;
	margin: 2em auto;
}
.youtube {
	width: 100%;
	position: relative;
	padding-top: 56.25%;
	overflow: hidden;
}
.youtube iframe {
	position: absolute;
	top: 0;
	left: 0;
	width: 100% !important;
	height: 100% !important;
}
.highlight-container {
	width: 100%;
	max-width: 900px;
	margin: 2em auto;
	display: block;
}
.highlight-box {
	width: 100%;
	margin: 1em 0;
}

.comment {
	position: relative;
	display: inline-block;
	margin: .5em 0 .5em 15px;
	padding: .5em;
	line-height:1.4em;
	color: #555;
	font-size: 16px;
	text-align: justify;
	text-justify: distribute;
	background: #FFF;
	border-radius:10px;
	border: solid 2px #555;
	box-sizing: border-box;
	font-family: 'Yusei Magic', sans-serif;
}
.comment::before{
	content: "";
	position: absolute;
	top: 50%;
	left: -12px;
	margin-top: -6px;
	border: 6px solid transparent;
	border-right: 6px solid #FFF;
	z-index: 2;
}
.comment:after{
	content: "";
	position: absolute;
	top: 50%;
	left: -18px;
	margin-top: -9px;
	border: 9px solid transparent;
	border-right: 9px solid #555;
	z-index: 1;
}

details {
	box-sizing: border-box;
	width: 100%;
	border: 2px solid;
	border-radius: 1em;
	margin: 1em 0;
	transition: all .3s;
	position: relative;
}
summary {
	outline: none;
	list-style :none;
	cursor: pointer;
	padding-bottom: 1.7em;
}
summary::-webkit-details-marker {
	display: none;
}
summary .alphabet {
	width: 2em;
	height: 2em;
	line-height: 2em;
	margin-bottom: .5em;
	text-align: center;
	color: white;
	border-radius: .8em 0 0 0;
}
summary .title {
	padding: .2em 1em;
	font-weight: bold;
	font-size: 1.2em;
	line-height: 1.3em;
}
summary .toggle {
	position: absolute;
	bottom: 0;
	right: 0;
	width: 4em;
	text-align: center;
	line-height: 1.4em;
	color: white;
	border-radius: .8em 0 .8em 0;
}
summary .toggle::before {
	content: "OPEN";
}
details[open] summary .toggle::before {
	content: "CLOSE";
}
.detail {
	padding: 1em;
	width: 100%;
	box-sizing: border-box;
}
.detail .detail-heading {
	color: white;
	display: inline-block;
	line-height: 1.8em;
	padding: 0 .5em;
	border-radius: .5em;
	margin-top: .8em;
	margin-bottom: .4em;
}
.detail .notes {
	font-size: .7em;
	color: #999;
	text-align: right;
}
.detail .logo {
	display: block;
	max-width: 150px;
	max-height: 100px;
	margin: .5em 0;
}
.detail .exhibitor {
	font-size: .8em;
	margin: .5em 0;
}
.detail .image-box {
	width: 100%;
	margin: 1em 0;
}
.detail .image-box img {
	display: block;
	max-width: 100%;
	max-height: 150px;
	margin: 1em auto;
	border-radius: .5em;
	box-shadow: 0 0 10px #AAA;
}
.detail .review-box {
	padding: .4em 1em;
	background-color: #fff;
}



@media screen and (min-width: 768px) {
	.top-message p {
		text-align: center;
	}
	.top-image-container {
		display: flex;
		justify-content: space-around;
	}
	.top-image-box {
		width: 30%;
	}
	.detail .image-box {
		display: flex;
		align-items: center;
		justify-content: center;
	}
	.detail .image-box img {
		margin: 0 3%;
		max-width: 28%;
		height: auto;
	}

	.highlight-container {
		display: flex;
		justify-content: space-between;
	}
	.highlight-box {
		width: 48%;
		margin: 0;
	}
}