@font-face {
	font-family: "CaseDisplay";
	src:
		local("Source Han Serif SC"),
		local("Noto Serif CJK SC"),
		local("Songti SC"),
		local("STZhongsong"),
		local("SimSun");
	font-display: swap;
}

@font-face {
	font-family: "CaseBody";
	src:
		local("HarmonyOS Sans SC"),
		local("Source Han Sans SC"),
		local("Noto Sans CJK SC"),
		local("PingFang SC"),
		local("Microsoft YaHei");
	font-display: swap;
}

:root {
	--space-2xs: 4px;
	--space-xs: 8px;
	--space-sm: 12px;
	--space-md: 16px;
	--space-lg: 24px;
	--space-xl: 32px;
	--space-2xl: 48px;
	--space-3xl: 64px;
	--space-4xl: 96px;
	--bg: oklch(0.19 0.02 250);
	--bg-soft: oklch(0.23 0.018 245);
	--panel: oklch(0.27 0.018 245 / 0.88);
	--panel-strong: oklch(0.31 0.02 248 / 0.92);
	--line: oklch(0.58 0.03 190 / 0.28);
	--text: oklch(0.95 0.01 95);
	--text-soft: oklch(0.8 0.02 100);
	--text-muted: oklch(0.68 0.02 100);
	--accent: oklch(0.73 0.09 170);
	--accent-deep: oklch(0.58 0.07 174);
	--gold: oklch(0.78 0.07 85);
	--shadow: 0 24px 60px oklch(0.08 0.01 240 / 0.42);
	--radius-lg: 32px;
	--radius-md: 24px;
	--radius-sm: 18px;
}

*,
*::before,
*::after {
	box-sizing: border-box;
}

html {
	scroll-behavior: smooth;
}

body {
	margin: 0;
	min-height: 100vh;
	background:
		linear-gradient(180deg, oklch(0.18 0.018 250 / 0.92), oklch(0.15 0.016 248 / 0.98)),
		url("../images/background.webp") center/cover fixed;
	color: var(--text);
	font-family: "CaseBody", sans-serif;
}

body::before {
	content: "";
	position: fixed;
	inset: 0;
	background:
		radial-gradient(circle at 10% 10%, color-mix(in oklab, var(--accent) 28%, transparent) 0, transparent 26%),
		radial-gradient(circle at 85% 12%, color-mix(in oklab, var(--gold) 22%, transparent) 0, transparent 24%),
		linear-gradient(to right, color-mix(in oklab, var(--line) 28%, transparent) 1px, transparent 1px),
		linear-gradient(to bottom, color-mix(in oklab, var(--line) 18%, transparent) 1px, transparent 1px);
	background-size: auto, auto, 72px 72px, 72px 72px;
	opacity: 0.68;
	pointer-events: none;
}

a {
	color: inherit;
}

.case-shell {
	position: relative;
	z-index: 1;
	width: min(1200px, calc(100% - 40px));
	margin: 0 auto;
	padding: 24px 0 56px;
}

.case-topbar,
.hero,
.panel-stage,
.narrative,
.capabilities,
.delivery,
.cta {
	animation: rise 760ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

.panel-stage {
	animation-delay: 80ms;
}

.narrative {
	animation-delay: 160ms;
}

.capabilities {
	animation-delay: 240ms;
}

.delivery {
	animation-delay: 320ms;
}

.cta {
	animation-delay: 400ms;
}

.case-topbar {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--space-lg);
	margin-bottom: clamp(24px, 4vw, 42px);
	padding: 14px 18px;
	border: 1px solid color-mix(in oklab, var(--line) 90%, transparent);
	border-radius: 999px;
	background: color-mix(in oklab, var(--bg-soft) 82%, transparent);
	backdrop-filter: blur(16px);
}

.case-topbar-actions {
	display: flex;
	flex-wrap: wrap;
	gap: var(--space-md);
}

.case-brand {
	display: inline-flex;
	align-items: center;
	gap: var(--space-md);
	min-width: 0;
	text-decoration: none;
}

.case-brand img {
	width: 44px;
	height: 44px;
	border-radius: 14px;
	object-fit: cover;
	box-shadow: 0 12px 24px oklch(0.08 0.01 240 / 0.28);
}

.case-brand span {
	font-size: 0.9rem;
	letter-spacing: 0;
	text-transform: uppercase;
	color: var(--text-soft);
}

.case-topbar-link {
	font-size: 0.9rem;
	letter-spacing: 0;
	text-transform: uppercase;
	text-decoration: none;
	color: var(--text-soft);
}

.case-topbar-link:hover,
.button:hover {
	transform: translateY(-2px);
}

.hero {
	display: grid;
	grid-template-columns: minmax(0, 1.2fr) minmax(260px, 0.8fr);
	gap: var(--space-xl);
	align-items: start;
	padding: clamp(28px, 5vw, 54px);
	border: 1px solid color-mix(in oklab, var(--line) 88%, transparent);
	border-radius: clamp(28px, 4vw, 42px);
	background:
		linear-gradient(135deg, oklch(0.21 0.02 250 / 0.94), oklch(0.25 0.02 238 / 0.88)),
		color-mix(in oklab, var(--bg) 82%, transparent);
	box-shadow: var(--shadow);
	overflow: hidden;
}

.hero::after {
	content: "";
	position: absolute;
	width: 240px;
	height: 240px;
	right: -72px;
	top: -84px;
	border-radius: 50%;
	background: color-mix(in oklab, var(--accent) 28%, transparent);
	filter: blur(12px);
	opacity: 0.72;
	pointer-events: none;
}

.hero,
.window,
.reason-card,
.capability,
.delivery-list,
.cta {
	position: relative;
}

.hero-copy {
	display: grid;
	gap: var(--space-lg);
	max-width: 46rem;
}

.eyebrow,
.card-label,
.meta-block span,
.delivery-list span {
	margin: 0;
	font-size: 0.78rem;
	letter-spacing: 0;
	text-transform: uppercase;
	color: var(--text-muted);
}

.hero h1,
.narrative-intro h2,
.section-head h2,
.delivery-copy h2,
.cta-copy h2,
.mock-card h2,
.capability h3,
.reason-card h3 {
	margin: 0;
	font-family: "CaseDisplay", serif;
	font-weight: 600;
	letter-spacing: 0;
	text-wrap: balance;
}

.hero h1 {
	max-width: 11ch;
	font-size: 5.4rem;
	line-height: 0.98;
}

.hero-lead,
.narrative-intro p,
.delivery-copy p,
.cta-copy p,
.capability p,
.reason-card p {
	margin: 0;
	max-width: 66ch;
	font-size: 1.02rem;
	line-height: 1.92;
	color: var(--text-soft);
}

.hero-actions,
.cta-actions {
	display: flex;
	flex-wrap: wrap;
	gap: var(--space-md);
}

.button {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	min-height: 52px;
	padding: 13px 22px;
	border-radius: 999px;
	border: 1px solid transparent;
	font-size: 0.95rem;
	font-weight: 700;
	text-decoration: none;
	transition:
		transform 220ms cubic-bezier(0.16, 1, 0.3, 1),
		background-color 220ms ease,
		border-color 220ms ease,
		color 220ms ease;
}

.button-primary {
	background: color-mix(in oklab, var(--accent) 24%, var(--text));
	color: oklch(0.2 0.016 246);
}

.button-secondary {
	border-color: color-mix(in oklab, var(--line) 90%, transparent);
	background: color-mix(in oklab, var(--panel) 88%, transparent);
	color: var(--text);
}

.hero-meta {
	display: grid;
	gap: var(--space-md);
	padding: var(--space-xl);
	border: 1px solid color-mix(in oklab, var(--line) 90%, transparent);
	border-radius: 28px;
	background: linear-gradient(180deg, color-mix(in oklab, var(--panel) 88%, transparent), color-mix(in oklab, var(--panel-strong) 92%, transparent));
}

.meta-block {
	display: grid;
	gap: var(--space-xs);
	padding-bottom: var(--space-md);
	border-bottom: 1px solid color-mix(in oklab, var(--line) 72%, transparent);
}

.meta-block:last-child {
	padding-bottom: 0;
	border-bottom: 0;
}

.meta-block strong {
	font-size: 1rem;
	line-height: 1.72;
	font-weight: 600;
	color: var(--text);
}

.panel-stage {
	display: grid;
	grid-template-columns: minmax(0, 1fr) 300px;
	grid-template-areas:
		"main side"
		"main bottom";
	gap: var(--space-lg);
	margin-top: clamp(32px, 6vw, 64px);
}

.window {
	border: 1px solid color-mix(in oklab, var(--line) 88%, transparent);
	border-radius: 26px;
	background: linear-gradient(180deg, color-mix(in oklab, var(--panel) 94%, transparent), color-mix(in oklab, var(--bg-soft) 94%, transparent));
	box-shadow: var(--shadow);
	backdrop-filter: blur(18px);
	overflow: hidden;
}

.window-main {
	grid-area: main;
}

.window-side {
	grid-area: side;
	align-self: start;
}

.window-bottom {
	grid-area: bottom;
	transform: translateX(-40px);
}

.window-bar {
	display: flex;
	align-items: center;
	gap: var(--space-md);
	padding: 14px 18px;
	border-bottom: 1px solid color-mix(in oklab, var(--line) 72%, transparent);
	background: color-mix(in oklab, var(--bg-soft) 90%, transparent);
}

.window-bar p {
	margin: 0;
	font-size: 0.86rem;
	letter-spacing: 0;
	text-transform: uppercase;
	color: var(--text-muted);
}

.window-dots {
	display: inline-flex;
	gap: var(--space-xs);
}

.window-dots span {
	width: 10px;
	height: 10px;
	border-radius: 50%;
	background: color-mix(in oklab, var(--gold) 54%, var(--text-muted));
}

.window-body {
	display: grid;
	grid-template-columns: 190px minmax(0, 1fr);
	min-height: 520px;
}

.mock-nav {
	display: grid;
	gap: 10px;
	padding: 20px;
	border-right: 1px solid color-mix(in oklab, var(--line) 70%, transparent);
	background: color-mix(in oklab, var(--bg) 72%, transparent);
}

.mock-nav span {
	padding: 11px 14px;
	border-radius: 16px;
	background: color-mix(in oklab, var(--panel) 60%, transparent);
	font-size: 0.92rem;
	color: var(--text-soft);
}

.mock-nav span:first-child {
	background: color-mix(in oklab, var(--accent) 20%, var(--panel-strong));
	color: var(--text);
}

.mock-main {
	display: grid;
	gap: var(--space-lg);
	padding: 24px;
}

.status-strip {
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: var(--space-md);
}

.status-strip div {
	display: grid;
	gap: 6px;
	padding: 14px 16px;
	border-radius: 18px;
	background: color-mix(in oklab, var(--panel-strong) 82%, transparent);
}

.status-strip small {
	font-size: 0.78rem;
	letter-spacing: 0;
	text-transform: uppercase;
	color: var(--text-muted);
}

.status-strip strong {
	font-size: 1rem;
	font-weight: 700;
	color: var(--text);
}

.mock-grid {
	display: grid;
	grid-template-columns: 1.1fr 0.9fr;
	gap: var(--space-md);
}

.mock-card {
	display: grid;
	gap: var(--space-sm);
	min-height: 200px;
	padding: 22px;
	border: 1px solid color-mix(in oklab, var(--line) 70%, transparent);
	border-radius: 22px;
	background: color-mix(in oklab, var(--panel) 88%, transparent);
}

.mock-card.tall {
	grid-row: span 2;
	min-height: 420px;
	background:
		radial-gradient(circle at top right, color-mix(in oklab, var(--accent) 28%, transparent) 0, transparent 40%),
		color-mix(in oklab, var(--panel-strong) 86%, transparent);
}

.mock-card h2 {
	font-size: 2.35rem;
	line-height: 1.06;
}

.mock-card h3 {
	margin: 0;
	font-size: 1.1rem;
	line-height: 1.55;
}

.mini-list {
	display: grid;
	gap: 10px;
	margin: 0;
	padding: 0;
	list-style: none;
	color: var(--text-soft);
}

.mini-list li {
	padding: 12px 14px;
	border-radius: 14px;
	background: color-mix(in oklab, var(--bg-soft) 68%, transparent);
}

.spark-group {
	margin-top: auto;
	display: grid;
	gap: 18px;
}

.spark {
	height: 120px;
	border-radius: 20px;
	background:
		linear-gradient(180deg, transparent, color-mix(in oklab, var(--accent) 12%, transparent)),
		color-mix(in oklab, var(--bg-soft) 84%, transparent);
	position: relative;
	overflow: hidden;
}

.spark::before {
	content: "";
	position: absolute;
	inset: 18px;
	border-radius: 14px;
	background:
		linear-gradient(90deg, transparent 0%, color-mix(in oklab, var(--gold) 38%, transparent) 40%, color-mix(in oklab, var(--accent) 58%, transparent) 60%, transparent 100%);
	clip-path: polygon(0 74%, 10% 66%, 24% 70%, 36% 44%, 47% 56%, 62% 22%, 74% 35%, 86% 18%, 100% 28%, 100% 100%, 0 100%);
}

.spark-b::before {
	background:
		linear-gradient(90deg, transparent 0%, color-mix(in oklab, var(--accent) 42%, transparent) 30%, color-mix(in oklab, var(--gold) 52%, transparent) 65%, transparent 100%);
	clip-path: polygon(0 70%, 16% 58%, 30% 64%, 44% 28%, 57% 36%, 73% 18%, 88% 30%, 100% 12%, 100% 100%, 0 100%);
}

.code-lines {
	display: grid;
	gap: 10px;
	margin-top: auto;
}

.code-lines span {
	display: block;
	height: 12px;
	border-radius: 999px;
	background: color-mix(in oklab, var(--text-muted) 28%, transparent);
}

.code-lines span:nth-child(1) {
	width: 88%;
}

.code-lines span:nth-child(2) {
	width: 64%;
}

.code-lines span:nth-child(3) {
	width: 92%;
}

.code-lines span:nth-child(4) {
	width: 50%;
}

.log-stack {
	display: grid;
	gap: 12px;
	padding: 18px;
}

.log-line {
	height: 12px;
	border-radius: 999px;
	background: color-mix(in oklab, var(--text-muted) 24%, transparent);
}

.log-ok {
	background: color-mix(in oklab, var(--accent) 56%, transparent);
}

.log-warn {
	background: color-mix(in oklab, var(--gold) 48%, transparent);
}

.token-cloud {
	display: flex;
	flex-wrap: wrap;
	gap: var(--space-sm);
	padding: 20px;
}

.token-cloud span {
	padding: 10px 14px;
	border: 1px solid color-mix(in oklab, var(--line) 70%, transparent);
	border-radius: 999px;
	background: color-mix(in oklab, var(--panel) 78%, transparent);
	color: var(--text-soft);
}

.narrative,
.capabilities,
.delivery,
.cta {
	display: grid;
	gap: var(--space-xl);
	margin-top: clamp(56px, 8vw, 92px);
}

.reason-grid {
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: var(--space-lg);
}

.reason-card,
.capability,
.delivery-list {
	border: 1px solid color-mix(in oklab, var(--line) 80%, transparent);
	border-radius: 24px;
	background: color-mix(in oklab, var(--panel) 90%, transparent);
	box-shadow: var(--shadow);
}

.reason-card {
	display: grid;
	gap: var(--space-sm);
	padding: 24px;
}

.reason-card:nth-child(2) {
	transform: translateY(18px);
	background: color-mix(in oklab, var(--panel-strong) 88%, transparent);
}

.reason-card:nth-child(3) {
	transform: rotate(-1.1deg);
}

.reason-card h3,
.capability h3 {
	font-size: 1.78rem;
	line-height: 1.15;
}

.capability-stack {
	display: grid;
	grid-template-columns: repeat(6, minmax(0, 1fr));
	gap: var(--space-lg);
}

.capability {
	display: grid;
	gap: var(--space-sm);
	padding: 24px;
	min-height: 240px;
}

.capability-wide {
	grid-column: span 3;
	background:
		radial-gradient(circle at top right, color-mix(in oklab, var(--accent) 24%, transparent) 0, transparent 36%),
		color-mix(in oklab, var(--panel-strong) 88%, transparent);
}

.capability-accent {
	grid-column: span 2;
	background:
		linear-gradient(180deg, color-mix(in oklab, var(--gold) 10%, var(--panel)) 0%, color-mix(in oklab, var(--panel-strong) 90%, transparent) 100%);
}

.capability:not(.capability-wide):not(.capability-accent) {
	grid-column: span 2;
}

.delivery {
	grid-template-columns: minmax(0, 1fr) minmax(300px, 0.88fr);
	align-items: start;
}

.delivery-list {
	display: grid;
	gap: var(--space-md);
	padding: 24px;
}

.delivery-list div {
	display: grid;
	gap: var(--space-xs);
	padding-bottom: var(--space-md);
	border-bottom: 1px solid color-mix(in oklab, var(--line) 70%, transparent);
}

.delivery-list div:last-child {
	padding-bottom: 0;
	border-bottom: 0;
}

.delivery-list strong {
	font-size: 1rem;
	line-height: 1.7;
	font-weight: 600;
}

.cta {
	grid-template-columns: minmax(0, 1fr) auto;
	align-items: end;
	padding: clamp(24px, 4vw, 38px);
	border: 1px solid color-mix(in oklab, var(--line) 90%, transparent);
	border-radius: 32px;
	background:
		radial-gradient(circle at top right, color-mix(in oklab, var(--accent) 24%, transparent) 0, transparent 28%),
		linear-gradient(145deg, color-mix(in oklab, var(--panel-strong) 92%, transparent), color-mix(in oklab, var(--panel) 92%, transparent));
	box-shadow: var(--shadow);
}

.case-topbar-link,
.button {
	transition:
		transform 220ms cubic-bezier(0.16, 1, 0.3, 1),
		color 220ms ease,
		background-color 220ms ease,
		border-color 220ms ease;
}

.case-topbar-link:focus-visible,
.button:focus-visible {
	outline: 2px solid color-mix(in oklab, var(--accent) 70%, var(--text));
	outline-offset: 4px;
}

@media (max-width: 1080px) {
	.hero,
	.delivery,
	.cta,
	.panel-stage {
		grid-template-columns: 1fr;
	}

	.panel-stage {
		grid-template-areas:
			"main"
			"side"
			"bottom";
	}

	.window-bottom {
		transform: none;
	}

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

	.reason-card:nth-child(2),
	.reason-card:nth-child(3) {
		transform: none;
	}

	.capability-stack {
		grid-template-columns: 1fr;
	}

	.capability,
	.capability-wide,
	.capability-accent {
		grid-column: auto;
		min-height: auto;
	}
}

@media (max-width: 760px) {
	.case-shell {
		width: min(100% - 24px, 1200px);
	}

	.case-topbar {
		flex-direction: column;
		align-items: flex-start;
		border-radius: 28px;
	}

	.case-brand {
		width: 100%;
	}

	.hero,
	.cta {
		padding: 24px;
	}

	.hero h1 {
		max-width: 9ch;
	}

	.window-body,
	.status-strip {
		grid-template-columns: 1fr;
	}

	.mock-nav {
		border-right: 0;
		border-bottom: 1px solid color-mix(in oklab, var(--line) 70%, transparent);
	}

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

	.mock-card.tall {
		grid-row: auto;
		min-height: 320px;
	}

	.hero-actions,
	.cta-actions {
		flex-direction: column;
		align-items: stretch;
	}

	.button {
		width: 100%;
	}
}

@media (prefers-reduced-motion: reduce) {
	html {
		scroll-behavior: auto;
	}

	.case-topbar,
	.hero,
	.panel-stage,
	.narrative,
	.capabilities,
	.delivery,
	.cta,
	.case-topbar-link,
	.button {
		animation: none;
		transition: none;
	}
}

@keyframes rise {
	from {
		opacity: 0;
		transform: translateY(18px);
	}

	to {
		opacity: 1;
		transform: translateY(0);
	}
}