:root {
	--bg: #f4f7fb;
	--surface: #ffffff;
	--surface-alt: #eef4fb;
	--ink: #122033;
	--muted: #536275;
	--line: rgba(18, 32, 51, 0.1);
	--brand: #0b5cab;
	--brand-deep: #073763;
	--accent: #ff8f32;
	--accent-soft: #fff1e5;
	--success: #1f8d63;
	--dark: #0d1726;
	--shadow: 0 24px 70px rgba(10, 38, 70, 0.12);
	--radius-xl: 28px;
	--radius-lg: 20px;
	--radius-md: 14px;
	--container: 1180px;
}

* {
	box-sizing: border-box;
}

html {
	scroll-behavior: smooth;
}

body {
	margin: 0;
	background: radial-gradient(circle at top left, rgba(11, 92, 171, 0.08), transparent 30%), linear-gradient(180deg, #f6f9fc 0%, #eef4fb 100%);
	color: var(--ink);
	font-family: 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', sans-serif;
	line-height: 1.65;
}

a {
	color: inherit;
	text-decoration: none;
}

img {
	display: block;
	max-width: 100%;
}

.container {
	width: min(calc(100% - 40px), var(--container));
	margin: 0 auto;
}

.site-header {
	position: sticky;
	top: 0;
	z-index: 20;
	transition:
		background-color 0.25s ease,
		box-shadow 0.25s ease,
		backdrop-filter 0.25s ease;
}

.site-header.is-scrolled {
	background: rgba(244, 247, 251, 0.88);
	box-shadow: 0 10px 30px rgba(10, 38, 70, 0.08);
	backdrop-filter: blur(14px);
}

.header-inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 20px;
	min-height: 86px;
}

.brand {
	display: inline-flex;
	align-items: center;
	gap: 14px;
	font-size: 18px;
	font-weight: 700;
	letter-spacing: 0.02em;
}

.brand img {
	width: 44px;
	height: 44px;
	object-fit: contain;
}

.site-nav {
	display: inline-flex;
	align-items: center;
	gap: 28px;
}

.site-nav a {
	position: relative;
	color: var(--muted);
	font-size: 15px;
	font-weight: 600;
}

.site-nav a::after {
	content: '';
	position: absolute;
	left: 0;
	bottom: -6px;
	width: 100%;
	height: 2px;
	transform: scaleX(0);
	transform-origin: left;
	background: linear-gradient(90deg, var(--brand), var(--accent));
	transition: transform 0.2s ease;
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
	transform: scaleX(1);
}

.menu-toggle {
	display: none;
	border: 0;
	background: transparent;
	padding: 0;
	width: 42px;
	height: 42px;
	cursor: pointer;
}

.menu-toggle span {
	display: block;
	width: 24px;
	height: 2px;
	margin: 7px auto;
	border-radius: 999px;
	background: var(--ink);
	transition:
		transform 0.2s ease,
		opacity 0.2s ease;
}

.hero {
	position: relative;
	overflow: hidden;
	padding: 44px 0 56px;
}

.hero-backdrop {
	position: absolute;
	inset: 0;
	background:
		radial-gradient(circle at 15% 18%, rgba(11, 92, 171, 0.18), transparent 28%),
		radial-gradient(circle at 86% 12%, rgba(255, 143, 50, 0.16), transparent 22%), linear-gradient(135deg, rgba(7, 55, 99, 0.04), rgba(31, 141, 99, 0.04));
	pointer-events: none;
}

.hero-grid {
	position: relative;
	display: grid;
	grid-template-columns: minmax(0, 1.1fr) minmax(360px, 0.9fr);
	gap: 28px;
	align-items: stretch;
}

.hero-copy,
.hero-panel {
	position: relative;
	z-index: 1;
}

.hero-copy {
	padding: 42px 0;
}

.eyebrow {
	margin: 0 0 16px;
	color: var(--brand);
	font-size: 13px;
	font-weight: 800;
	letter-spacing: 0.18em;
	text-transform: uppercase;
}

.hero h1,
.section-head h2,
.section-cta h2 {
	margin: 0;
	line-height: 1.12;
}

.hero h1 {
	max-width: 14ch;
	font-size: clamp(38px, 5.2vw, 68px);
	letter-spacing: -0.04em;
}
.hero h1 .modules {
	font-size: 36px;
}

.hero-text,
.section-head p,
.overview-card p,
.module-card p,
.timeline p,
.scenario-card p,
.advantage-grid p,
.cta-panel p,
.site-footer p,
.signal-card li,
.signal-grid p {
	color: var(--muted);
}

.hero-text {
	max-width: 620px;
	margin: 22px 0 0;
	font-size: 18px;
}

.hero-actions,
.cta-actions {
	display: flex;
	flex-wrap: wrap;
	gap: 14px;
	margin-top: 28px;
}

.button {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	min-height: 50px;
	padding: 0 22px;
	border-radius: 999px;
	border: 1px solid transparent;
	font-size: 15px;
	font-weight: 700;
	transition:
		transform 0.2s ease,
		box-shadow 0.2s ease,
		background-color 0.2s ease;
}

.button:hover,
.button:focus-visible {
	transform: translateY(-1px);
}

.button-primary {
	background: linear-gradient(135deg, var(--brand), #1a76cb);
	color: #fff;
	box-shadow: 0 18px 34px rgba(11, 92, 171, 0.24);
}

.button-secondary {
	border-color: rgba(11, 92, 171, 0.16);
	background: rgba(255, 255, 255, 0.78);
	color: var(--brand-deep);
}

.button-secondary.alt {
	border-color: rgba(255, 255, 255, 0.2);
	background: rgba(255, 255, 255, 0.08);
	color: #fff;
}

.hero-metrics {
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 14px;
	margin: 34px 0 0;
	padding: 0;
	list-style: none;
}

.hero-metrics li,
.signal-card,
.signal-grid article,
.overview-card,
.module-card,
.timeline article,
.scenario-card,
.cta-panel {
	background: rgba(255, 255, 255, 0.82);
	border: 1px solid rgba(255, 255, 255, 0.7);
	box-shadow: var(--shadow);
	backdrop-filter: blur(10px);
}

.hero-metrics li {
	padding: 18px 18px 16px;
	border-radius: var(--radius-lg);
}

.hero-metrics strong {
	display: block;
	color: var(--brand-deep);
	font-size: 28px;
	line-height: 1;
}

.hero-metrics span {
	display: block;
	margin-top: 9px;
	color: var(--muted);
	font-size: 14px;
}

.hero-panel {
	display: grid;
	gap: 18px;
}

.signal-card {
	padding: 28px;
	border-radius: var(--radius-xl);
}

.signal-title {
	margin: 0 0 14px;
	color: var(--ink);
	font-size: 18px;
	font-weight: 800;
}

.signal-card ul,
.module-card ul {
	margin: 0;
	padding-left: 18px;
}

.signal-grid {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 18px;
}

.signal-grid article {
	padding: 22px;
	border-radius: var(--radius-lg);
}

.signal-grid span,
.module-index {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	min-width: 56px;
	height: 34px;
	padding: 0 12px;
	border-radius: 999px;
	background: var(--accent-soft);
	color: #b45500;
	font-size: 13px;
	font-weight: 800;
	letter-spacing: 0.08em;
}

.signal-grid h2,
.overview-card h3,
.module-card h3,
.timeline h3,
.scenario-card h3,
.advantage-grid h3 {
	margin: 16px 0 10px;
	font-size: 21px;
}

.section {
	padding: 86px 0;
}

.section-overview {
	padding-top: 54px;
}

.section-head {
	max-width: 760px;
	margin-bottom: 34px;
}

.section-head h2 {
	font-size: clamp(30px, 3.8vw, 48px);
	letter-spacing: -0.03em;
}

.section-head p {
	margin: 14px 0 0;
	font-size: 17px;
}

.overview-grid,
.scenario-grid,
.advantage-grid {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 20px;
}

.overview-card {
	min-height: 220px;
	padding: 28px;
	border-radius: var(--radius-xl);
	overflow: hidden;
}

.overview-card::before {
	content: '';
	display: block;
	width: 66px;
	height: 5px;
	border-radius: 999px;
	margin-bottom: 20px;
}

.accent-blue::before {
	background: linear-gradient(90deg, #0b5cab, #4da3ff);
}

.accent-orange::before {
	background: linear-gradient(90deg, #ff8f32, #ffd166);
}

.accent-green::before {
	background: linear-gradient(90deg, #1f8d63, #4dd8a6);
}

.accent-dark::before {
	background: linear-gradient(90deg, #122033, #44607f);
}

.module-list {
	display: grid;
	gap: 18px;
}

.module-card {
	display: grid;
	grid-template-columns: 88px minmax(0, 1fr);
	gap: 18px;
	padding: 24px;
	border-radius: var(--radius-xl);
}

.module-index {
	align-self: start;
	min-width: 64px;
	height: 40px;
}

.module-card ul {
	margin-top: 14px;
}

.module-card li,
.signal-card li {
	margin-bottom: 6px;
}

.section-gallery {
	padding-top: 32px;
}

.gallery-grid {
	display: grid;
	grid-template-columns: repeat(5, minmax(0, 1fr));
	gap: 20px;
	align-items: stretch;
}

.gallery-card {
	overflow: hidden;
	border-radius: var(--radius-xl);
	background: rgba(255, 255, 255, 0.9);
	border: 1px solid rgba(255, 255, 255, 0.76);
	box-shadow: var(--shadow);
}

.gallery-card img {
	width: 100%;
	height: 220px;
	object-fit: contain;
	background: #dce7f4;
}

.gallery-card-mobile img {
	object-fit: contain;
	background: radial-gradient(circle at top, rgba(11, 92, 171, 0.12), transparent 40%), linear-gradient(180deg, #eef4fb, #dfe8f4);
}

.gallery-copy {
	padding: 20px 22px 22px;
}

.gallery-copy strong {
	display: block;
	margin-bottom: 8px;
	font-size: 20px;
	line-height: 1.2;
}

.gallery-copy p {
	margin: 0;
	color: var(--muted);
}

.section-tint {
	background:
		radial-gradient(circle at top right, rgba(255, 143, 50, 0.08), transparent 28%),
		linear-gradient(180deg, rgba(255, 255, 255, 0.42), rgba(225, 236, 248, 0.72));
}

.section-roles {
	padding-top: 54px;
}

.roles-layout {
	display: grid;
	grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
	gap: 22px;
	align-items: stretch;
}

.roles-visual,
.role-card {
	background: rgba(255, 255, 255, 0.9);
	border: 1px solid rgba(255, 255, 255, 0.76);
	box-shadow: var(--shadow);
}

.roles-visual {
	overflow: hidden;
	border-radius: var(--radius-xl);
	padding: 18px;
}

.roles-visual img {
	width: 100%;
	border-radius: calc(var(--radius-xl) - 10px);
}

.roles-copy {
	display: grid;
	grid-template-columns: 1fr;
	gap: 16px;
}

.role-card {
	border-radius: var(--radius-lg);
	padding: 22px;
}

.role-card h3 {
	margin: 0 0 10px;
	font-size: 21px;
}

.role-card p {
	margin: 0;
	color: var(--muted);
}

.timeline {
	display: grid;
	grid-template-columns: repeat(5, minmax(0, 1fr));
	gap: 18px;
}

.timeline article {
	padding: 24px 22px;
	border-radius: var(--radius-lg);
}

.timeline span {
	color: var(--brand);
	font-size: 12px;
	font-weight: 800;
	letter-spacing: 0.12em;
}

.scenario-card {
	padding: 26px;
	border-radius: var(--radius-lg);
}

.section-dark {
	background: radial-gradient(circle at top right, rgba(255, 143, 50, 0.12), transparent 24%), linear-gradient(180deg, #0c1521, #132233);
	color: #fff;
}

.section-head.light .eyebrow {
	color: #8fc2ff;
}

.section-head.light p,
.section-dark .advantage-grid p {
	color: rgba(255, 255, 255, 0.72);
}

.advantage-grid article {
	padding: 26px;
	border: 1px solid rgba(255, 255, 255, 0.08);
	border-radius: var(--radius-lg);
	background: rgba(255, 255, 255, 0.04);
}

.section-cta {
	padding-top: 52px;
}

.cta-panel {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 24px;
	padding: 36px;
	border-radius: calc(var(--radius-xl) + 6px);
	background: radial-gradient(circle at 90% 10%, rgba(255, 255, 255, 0.16), transparent 25%), linear-gradient(135deg, #0b5cab, #123359);
	color: #fff;
}

.cta-panel .eyebrow,
.cta-panel p {
	color: rgba(255, 255, 255, 0.78);
}

.site-footer {
	padding: 0 0 32px;
}

.footer-inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 20px;
	padding-top: 12px;
}

.footer-inner strong {
	display: block;
	margin-bottom: 6px;
	font-size: 17px;
}

.footer-meta {
	display: flex;
	flex-direction: column;
	align-items: flex-end;
	gap: 8px;
	text-align: right;
}

.footer-meta a {
	color: var(--brand-deep);
	font-weight: 700;
}

@media (max-width: 1080px) {
	.hero-grid,
	.overview-grid,
	.gallery-grid,
	.roles-layout,
	.scenario-grid,
	.advantage-grid,
	.timeline {
		grid-template-columns: repeat(2, minmax(0, 1fr));
	}

	.hero-grid {
		gap: 22px;
	}

	.cta-panel,
	.footer-inner {
		flex-direction: column;
		align-items: flex-start;
	}

	.footer-meta {
		align-items: flex-start;
		text-align: left;
	}
}

@media (max-width: 820px) {
	.container {
		width: min(calc(100% - 28px), var(--container));
	}

	.header-inner {
		min-height: 76px;
	}

	.menu-toggle {
		display: inline-block;
	}

	.site-nav {
		position: absolute;
		top: calc(100% + 8px);
		right: 14px;
		left: 14px;
		display: none;
		flex-direction: column;
		align-items: flex-start;
		gap: 18px;
		padding: 22px;
		border-radius: 20px;
		background: rgba(255, 255, 255, 0.96);
		box-shadow: var(--shadow);
	}

	.site-nav.is-open {
		display: flex;
	}

	.hero {
		padding-top: 18px;
	}

	.hero-grid,
	.signal-grid,
	.overview-grid,
	.roles-layout,
	.scenario-grid,
	.advantage-grid,
	.timeline,
	.hero-metrics {
		grid-template-columns: 1fr;
	}

	.gallery-grid {
		grid-template-columns: 1fr;
	}

	.hero h1 {
		max-width: none;
	}

	.hero-copy {
		padding: 20px 0 8px;
	}

	.gallery-card img {
		height: 240px;
	}

	.module-card {
		grid-template-columns: 1fr;
	}

	.section {
		padding: 72px 0;
	}

	.cta-panel {
		padding: 28px;
	}
}

@media (max-width: 560px) {
	.brand span {
		font-size: 16px;
	}

	.hero-text,
	.section-head p {
		font-size: 16px;
	}

	.overview-card,
	.module-card,
	.scenario-card,
	.timeline article,
	.signal-card,
	.signal-grid article {
		padding: 22px;
	}

	.button {
		width: 100%;
	}
}