/* ===== Section ===== */
.stc-section {
	position: relative;
	background-color: #eef0ee;
	padding: 60px 40px;
	overflow: hidden;
	box-sizing: border-box;
}

/* 装饰：左上淡圆弧 + 右上淡点阵 */
.stc-section.stc-deco::before {
	content: "";
	position: absolute;
	top: -120px;
	left: -120px;
	width: 320px;
	height: 320px;
	border-radius: 50%;
	background: radial-gradient(circle at 60% 60%, #e2e7e0 0%, #e2e7e0 60%, transparent 61%);
	opacity: .7;
	pointer-events: none;
}
.stc-section.stc-deco::after {
	content: "";
	position: absolute;
	top: 24px;
	right: 30px;
	width: 160px;
	height: 90px;
	background-image: radial-gradient(#d3d8d3 1.5px, transparent 1.6px);
	background-size: 14px 14px;
	opacity: .6;
	pointer-events: none;
}

/* ===== Header ===== */
.stc-header {
	position: relative;
	z-index: 1;
	text-align: center;
	max-width: 720px;
	margin: 0 auto 44px;
}
.stc-heading {
	font-size: 36px;
	font-weight: 800;
	letter-spacing: .3px;
	color: #1a1a1a;
	margin: 0 0 18px;
	line-height: 1.2;
}
.stc-heading .stc-hl {
	position: relative;
	color: #4a7043;
}
.stc-heading .stc-hl::after {
	content: "";
	position: absolute;
	left: 0;
	right: 0;
	bottom: -8px;
	height: 3px;
	border-radius: 3px;
	background: #4a7043;
}
.stc-intro {
	font-size: 15px;
	line-height: 1.7;
	color: #6b6b6b;
	margin: 0;
}

/* ===== Grid ===== */
.stc-grid {
	position: relative;
	z-index: 1;
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 24px;
	max-width: 1120px;
	margin: 0 auto;
}

/* ===== Card ===== */
.stc-item {
	position: relative;
	display: flex;
	flex-direction: column;
	background: #fff;
	border-radius: 16px;
	box-shadow: 0 12px 30px rgba(0, 0, 0, .06);
}

.stc-img {
	width: 100%;
	height: 236px;
	background-size: cover;
	background-position: center;
	background-repeat: no-repeat;
	border-radius: 16px 16px 0 0;
}

.stc-body {
	position: relative;
	padding: 24px 24px 26px;
	background: #fff;
	border-radius: 0 0 16px 16px;
}

/* 顶部中间小三角缺口 */
.stc-body.stc-notch::before {
	content: "";
	position: absolute;
	top: -9px;
	left: 50%;
	transform: translateX(-50%);
	border-left: 10px solid transparent;
	border-right: 10px solid transparent;
	border-bottom: 10px solid #fff;
}

.stc-head {
	position: relative;
	display: flex;
	align-items: center;
	gap: 12px;
	margin-bottom: 12px;
}

.stc-num {
	flex: 0 0 auto;
	width: 46px;
	height: 46px;
	border-radius: 50%;
	background: #4a7043;
	color: #fff;
	font-size: 16px;
	font-weight: 700;
	display: inline-flex;
	align-items: center;
	justify-content: center;
}

.stc-icon {
	flex: 0 0 auto;
	color: #4a7043;
	font-size: 20px;
	display: inline-flex;
	align-items: center;
}
.stc-icon svg {
	width: 20px;
	height: 20px;
	fill: #4a7043;
}

.stc-title {
	flex: 1 1 auto;
	min-width: 0;
	font-size: 17px;
	font-weight: 700;
	color: #1a1a1a;
	line-height: 1.25;
}

/* 连接线：位于第 2、3 张卡片头部左侧，向左伸入间隙，
   连回上一张卡片；绿点在靠近上一张卡片的左端 */
.stc-connector {
	position: absolute;
	top: 50%;
	right: 100%;
	width: 48px;
	height: 0;
	border-top: 2px dashed #c9c9c9;
	transform: translateY(-50%);
}
.stc-connector::before {
	content: "";
	position: absolute;
	top: 50%;
	left: -4px;
	width: 7px;
	height: 7px;
	border-radius: 50%;
	background: #4a7043;
	transform: translateY(-50%);
}

.stc-desc {
	font-size: 14px;
	line-height: 1.7;
	color: #6b6b6b;
	margin: 0;
}

/* ===== Footer ===== */
.stc-footer {
	position: relative;
	z-index: 1;
	display: flex;
	align-items: center;
	justify-content: center;
	gap: 10px;
	margin-top: 40px;
	font-size: 15px;
	color: #555;
	text-align: center;
}
.stc-footer .stc-footer-icon,
.stc-footer .stc-footer-icon i {
	color: #4a7043;
	font-size: 20px;
	display: inline-flex;
	align-items: center;
}
.stc-footer .stc-footer-icon svg {
	width: 20px;
	height: 20px;
	fill: #4a7043;
}
.stc-footer .stc-hl {
	color: #4a7043;
	font-weight: 700;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
	.stc-grid { grid-template-columns: repeat(2, 1fr); }
	.stc-connector { display: none; }
}
@media (max-width: 767px) {
	.stc-grid { grid-template-columns: 1fr; }
	.stc-connector { display: none; }
}