/**
 * Section 08 — FR-4 PCB Design Guides
 * 设计基准 1280px | 白底 + 居中标题 + 浮图卡片 + 双列导览
 * 浮图效果公式：photo_h=355px, card_top=163px → overlap=192px
 *   .card-photo { height: 355px; }
 *   .card-body  { margin-top: -192px; padding-top: 155px; }
 */

/* ============================================================
   外层 section + inner
   ============================================================ */
.sparta-product-detail-design-guides {
	background: #ffffff;
	padding: 80px 0 100px;
}

.sparta-product-detail-design-guides__inner {
	max-width: 1280px;
	margin: 0 auto;
	padding: 0 40px;
	box-sizing: border-box;
}

/* ============================================================
   顶部居中标题区
   ============================================================ */
.sparta-product-detail-design-guides__header {
	text-align: center;
	display: flex;
	flex-direction: column;
	gap: 27px;
	align-items: center;
	margin-bottom: 56px;
}

.sparta-product-detail-design-guides__title {
	font-family: 'Anton', sans-serif;
	font-size: 48px;
	line-height: 60px;
	color: #012f73;
	font-weight: 400;
	margin: 0;
}

.sparta-product-detail-design-guides__desc {
	font-family: 'Montserrat', sans-serif;
	font-weight: 500;
	font-size: 16px;
	line-height: 30px;
	color: #000;
	max-width: 630px;
	margin: 0;
}

/* ============================================================
   双浮图卡片（float-image-over-card 模式）
   card-photo 高 355px 透明 PNG；card-body 蓝色圆角卡，从 y=163 起
   公式：overlap = 355 - 163 = 192px
   ============================================================ */
.sparta-product-detail-design-guides__cards {
	display: flex;
	gap: 36px;
	margin-bottom: 64px;
}

.sparta-product-detail-design-guides__card {
	flex: 1;
	position: relative;
}

/* 图片区：透明PNG，不裁切 */
.sparta-product-detail-design-guides__card-photo {
	height: 355px;
	display: flex;
	align-items: flex-end;
	justify-content: center;
	position: relative;
	z-index: 2;
}

.sparta-product-detail-design-guides__card-photo img {
	width: 100%;
	height: 100%;
	object-fit: contain;
	display: block;
}

/* 卡片主体：蓝色背景圆角，用负 margin-top 与图片重叠 */
.sparta-product-detail-design-guides__card-body {
	background: #d0e4ff;
	border-radius: 20px;
	margin-top: -192px;
	padding: 155px 37px 34px;
	position: relative;
	z-index: 1;
	box-sizing: border-box;
}

.sparta-product-detail-design-guides__card-caption {
	font-family: 'Montserrat', sans-serif;
	font-weight: 500;
	font-size: 16px;
	line-height: 25px;
	color: #043580;
	margin: 0;
}

/* ============================================================
   底部双列文字导览
   ============================================================ */
.sparta-product-detail-design-guides__guides {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 0 37px;
}

.sparta-product-detail-design-guides__guide-col {
	display: flex;
	flex-direction: column;
	gap: 0;
}

.sparta-product-detail-design-guides__guide-item {
	padding-bottom: 28px;
}

.sparta-product-detail-design-guides__guide-title {
	font-family: 'Montserrat', sans-serif;
	font-weight: 700;
	font-size: 24px;
	line-height: 25px;
	color: #043580;
	margin: 0 0 12px;
}

.sparta-product-detail-design-guides__guide-desc {
	font-family: 'Montserrat', sans-serif;
	font-weight: 500;
	font-size: 16px;
	line-height: 25px;
	color: #043580;
	margin: 0;
}

/* ============================================================
   大屏 ≥1800px
   ============================================================ */
@media (min-width: 1800px) {
	.sparta-product-detail-design-guides__inner {
		max-width: 1400px;
	}

	.sparta-product-detail-design-guides__title {
		font-size: 54px;
	}

	.sparta-product-detail-design-guides__card-photo {
		height: 400px;
	}

	.sparta-product-detail-design-guides__card-body {
		margin-top: -210px;
		padding-top: 175px;
	}
}

/* ============================================================
   平板 768px–1279px
   ============================================================ */
@media (min-width: 768px) and (max-width: 1279px) {
	.sparta-product-detail-design-guides {
		padding: 60px 0 80px;
	}

	.sparta-product-detail-design-guides__inner {
		padding: 0 24px;
	}

	.sparta-product-detail-design-guides__title {
		font-size: 36px;
		line-height: 46px;
	}

	.sparta-product-detail-design-guides__cards {
		gap: 24px;
		margin-bottom: 48px;
	}

	.sparta-product-detail-design-guides__card-photo {
		height: 280px;
	}

	.sparta-product-detail-design-guides__card-body {
		margin-top: -140px;
		padding: 110px 24px 28px;
	}

	.sparta-product-detail-design-guides__guide-title {
		font-size: 18px;
	}

	.sparta-product-detail-design-guides__guide-desc {
		font-size: 14px;
	}
}

/* ============================================================
   手机 ≤767px：单列
   ============================================================ */
@media (max-width: 767px) {
	.sparta-product-detail-design-guides {
		padding: 48px 0 64px;
	}

	.sparta-product-detail-design-guides__inner {
		padding: 0 16px;
	}

	.sparta-product-detail-design-guides__title {
		font-size: 28px;
		line-height: 36px;
	}

	.sparta-product-detail-design-guides__cards {
		flex-direction: column;
		gap: 40px;
		margin-bottom: 40px;
	}

	.sparta-product-detail-design-guides__card-photo {
		height: 220px;
	}

	.sparta-product-detail-design-guides__card-body {
		margin-top: -100px;
		padding: 80px 20px 24px;
	}

	.sparta-product-detail-design-guides__guides {
		grid-template-columns: 1fr;
		gap: 0;
	}

	.sparta-product-detail-design-guides__guide-title {
		font-size: 18px;
	}

	.sparta-product-detail-design-guides__guide-desc {
		font-size: 14px;
	}
}