/* =========================================================
   3-1 页：Special Case — High GDP, Low Life Expectancy
   header 复用 .page-21-header（见 page21.css）
   ========================================================= */

.page-31 {
	position: relative;
	display: flex;
	flex-direction: column;
	align-items: flex-start;
	/* 底部留出空间备用 */
	padding: clamp(1.4rem, 3vw, 2.4rem) clamp(1.4rem, 3vw, 2.4rem) clamp(3.6rem, 7vh, 5.4rem);
	gap: 1rem;
}

/* 左右双栏：左侧文字区稍宽 */
.page-31-body {
	flex: 1;
	min-height: 0;
	width: 100%;
	display: grid;
	grid-template-columns: 55fr 45fr;
	gap: clamp(0.9rem, 2vw, 1.4rem);
}

/* ── 左栏：文字 + 图片 ── */
.page-31-analysis {
	display: flex;
	flex-direction: column;
	gap: 0.9rem;
	min-height: 0;
}

/* 可内部滚动的文字卡片 */
.page-31-text {
	flex: 1;
	min-height: 0;
	overflow-y: auto;
	padding: 1rem 1.1rem;
	border-radius: 1rem;
	background: rgba(255, 252, 246, 0.72);
	border: 1px solid rgba(31, 31, 31, 0.14);
	box-shadow: 0 18px 45px rgba(31, 31, 31, 0.08);
	backdrop-filter: blur(8px);
	scrollbar-width: thin;
	scrollbar-color: rgba(23, 72, 106, 0.28) transparent;
}

.page-31-text::-webkit-scrollbar {
	width: 4px;
}

.page-31-text::-webkit-scrollbar-thumb {
	background: rgba(23, 72, 106, 0.28);
	border-radius: 2px;
}

/* 第一段加粗引导语 */
.page-31-lead {
	margin: 0 0 0.9rem;
	font-size: clamp(0.98rem, 1.3vw, 1.08rem);
	font-weight: 600;
	line-height: 1.55;
	color: #17486a;
}

.page-31-text p {
	margin: 0 0 0.75rem;
	font-size: clamp(0.88rem, 1.15vw, 0.98rem);
	line-height: 1.72;
	opacity: 0.88;
}

.page-31-text p:last-child {
	margin-bottom: 0;
}

/* 图片插入区（可选，後续替換为真实圖片） */
.page-31-figure {
	flex-shrink: 0;
	margin: 0;
}

.page-31-image-slot {
	height: clamp(8rem, 17vh, 11rem);
	border-radius: 1rem;
	border: 1.5px dashed rgba(31, 31, 31, 0.2);
	background: rgba(255, 255, 255, 0.52);
	display: grid;
	place-items: center;
	color: var(--text-color);
	font-size: 0.9rem;
	opacity: 0.7;
}

.page-31-figure figcaption {
	margin-top: 0.4rem;
	font-size: 0.8rem;
	opacity: 0.58;
	text-align: center;
	font-style: italic;
}

/* ── 右栏：两张图表上下堆叠 ── */
.page-31-charts {
	display: flex;
	flex-direction: column;
	gap: clamp(0.8rem, 1.5vh, 1.1rem);
	min-height: 0;
}

.page-31-chart-slot {
	flex: 1;
	min-height: 0;
	border-radius: 1.2rem;
	background:
		linear-gradient(160deg, rgba(255, 255, 255, 0.82), rgba(230, 240, 245, 0.64)),
		radial-gradient(circle at top left, rgba(44, 109, 142, 0.1), transparent 52%);
	border: 1px solid rgba(23, 72, 106, 0.12);
	box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.68), 0 14px 32px rgba(31, 31, 31, 0.07);
	display: grid;
	place-items: center;
	padding: 1rem;
	position: relative;
}

.page-31-chart-slot p {
	margin: 0;
	font-size: clamp(0.9rem, 1.3vw, 1rem);
	opacity: 0.72;
	text-align: center;
	line-height: 1.65;
}

/* 图表标签（右上角小标） */
.page-31-chart-label {
	position: absolute;
	top: 0.62rem;
	left: 0.9rem;
	font-size: 0.76rem;
	letter-spacing: 0.06em;
	text-transform: uppercase;
	opacity: 0.52;
	font-weight: 600;
}

@media (max-width: 900px) {
	.page-31-body {
		grid-template-columns: 1fr;
	}

	.page-31-charts {
		flex-direction: row;
	}

	.page-31-figure {
		display: none;
	}
}

@media (max-width: 768px) {
	.page-31 {
		padding-bottom: clamp(4.2rem, 10vh, 6rem);
	}

	.page-31-charts {
		flex-direction: column;
	}
}