/* CSS Document */
*,
*::after,
*::before {
	-webkit-box-sizing: border-box;
	box-sizing: border-box;
}

/* Content 内容部分 */
.content {
	position: relative;
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	margin: 0 auto;
	padding: 0 0 1em;
	max-width: 1366px;
}
.content h1 {
	margin: auto;
}
.content:not(:first-child) {
	padding: 4em 0;
}

.content.content--padded {
	padding: 4em 0 8em;
}

.content__title {
	font-size: 0.85em;
	position: absolute;
	top: 18%;
	left: 2em;
	width: 5em;
	margin: 0.75em 0;
	color: #b0adad;
}

/* Grid */
.grid {
	position: relative;
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	align-items: center;
	width: 100%;
	padding: 0 7em;
	perspective: 800px;
	perspective-origin: 50% 100%;
}

.grid__item {
	position: relative;
	display: block;
	flex: none;
	width: 250px;
	margin: 1.5em 2vw;
	cursor: default;
	transform-style: preserve-3d;
}

.grid__item:hover,
.grid__item:focus {
	outline: none;
}

.grid__item--c1,
.grid__item--c1:hover,
.grid__item--c1:focus {
	color: #52649e;
}

.stack {
	position: relative;
	width: 100%;
	height: 250px;
	transform-style: preserve-3d;
}

.stack__deco {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background-color: #333;
	transform-origin: 50% 100%;
}

.stack__deco:first-child {
	opacity: 0.2;
}

.stack__deco:nth-child(2) {
	opacity: 0.4;
}

.stack__deco:nth-child(3) {
	opacity: 0.6;
}

.stack__deco:nth-child(4) {
	opacity: 0.8;
}

.stack__figure {
	position: relative;
	display: flex;
	justify-content: center;
	align-items: center;
	overflow: hidden;
	width: 100%;
	height: 100%;
	cursor: pointer;
	transform-origin: 50% 100%;
}

.stack__img {
	position: relative;
	display: block;
	flex: none;
}

.grid__item-caption {
	position: relative;
	display: flex;
	flex-wrap: wrap;
	width: 100%;
	transform-style: preserve-3d;
}

.grid__item-title {
	font-size: 1.15em;
	width: 100%;
	margin: 1em 0;
	text-align: left;
	color: #000;
}

.column {
	width: 50%;
	padding: 0 0.5em;
	opacity: 0;
}

.column--left {
	text-align: right;
}

.column--right {
	text-align: left;
}

.column__text {
	font-size: 0.85em;
	display: block;
	color: #333;
}

.column--left .column__text {
	font-weight: bold;
}

.column--right .column__text {
	color: #b0adad;
}

/* Individual effects 个体效应项 */
/* 文件夹打开样式 */
.grid--effect-altair {
	perspective-origin: 50% -50%;
}

.grid--effect-altair .column {
	opacity: 1;
}

.grid--effect-altair .stack__figure,
.grid--effect-altair .stack__deco {
	transform-origin: 50% 100%;
}