:root {
	--bg: #05060c;
	--bg-alt: #0b0d19;
	--surface: rgba(15, 18, 36, 0.85);
	--surface-strong: rgba(22, 25, 49, 0.9);
	--text: #f4f6ff;
	--muted: #aab4d9;
	--accent: #8b5cf6;
	--accent-2: #22d3ee;
	--border: rgba(255, 255, 255, 0.08);
	--shadow: 0 20px 60px rgba(3, 4, 20, 0.45);
	--radius: 24px;
	color-scheme: dark;
}

* {
	box-sizing: border-box;
}

html {
	scroll-behavior: smooth;
}

body {
	margin: 0;
	font-family: 'Space Grotesk', 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
	background: radial-gradient(circle at top, #101329 0%, #05060c 60%);
	color: var(--text);
	min-height: 100vh;
	line-height: 1.5;
}

body::before {
	content: '';
	position: fixed;
	inset: 0;
	background: linear-gradient(120deg, rgba(139, 92, 246, 0.2), rgba(34, 211, 238, 0.1));
	filter: blur(120px);
	z-index: -2;
}

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

.background-grid {
	position: fixed;
	inset: 0;
	background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
		linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
	background-size: 80px 80px;
	mask-image: radial-gradient(circle at center, rgba(255, 255, 255, 0.8), transparent 70%);
	z-index: -3;
}

.orb {
	position: fixed;
	width: 320px;
	height: 320px;
	border-radius: 50%;
	filter: blur(40px);
	opacity: 0.4;
	z-index: -1;
}

.orb-left {
	top: 10%;
	left: -10%;
	background: radial-gradient(circle, rgba(139, 92, 246, 0.6), transparent 60%);
}

.orb-right {
	bottom: 5%;
	right: -5%;
	background: radial-gradient(circle, rgba(34, 211, 238, 0.6), transparent 60%);
}

.site-header {
	position: sticky;
	top: 0;
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 1rem;
	padding: 1.5rem clamp(1.5rem, 5vw, 4rem);
	backdrop-filter: blur(20px);
	background: rgba(5, 6, 12, 0.65);
	border-bottom: 1px solid var(--border);
	z-index: 10;
}

.site-header.is-condensed {
	background: rgba(5, 6, 12, 0.92);
	padding-top: 1rem;
	padding-bottom: 1rem;
	border-bottom-color: rgba(255, 255, 255, 0.12);
}

.logo {
	display: flex;
	align-items: center;
	gap: 0.75rem;
}

.logo-image {
	height: 48px;
	width: auto;
	object-fit: contain;
	display: block;
	filter: drop-shadow(0 8px 18px rgba(3, 4, 20, 0.45));
}

.logo-text {
	font-weight: 600;
	display: flex;
	flex-direction: column;
	line-height: 1.1;
}

.logo-text small {
	font-size: 0.75rem;
	color: var(--muted);
}

.site-nav {
	display: flex;
	gap: 1.5rem;
	font-weight: 500;
}

.site-nav a {
	color: var(--muted);
	text-decoration: none;
	padding: 0.4rem 0.2rem;
	position: relative;
}

.site-nav a.current,
.site-nav a:hover {
	color: var(--text);
}

.site-nav a.current::after {
	content: '';
	position: absolute;
	left: 0;
	right: 0;
	bottom: -0.35rem;
	height: 2px;
	background: linear-gradient(90deg, var(--accent), var(--accent-2));
	border-radius: 999px;
}

.lang-toggle {
	display: inline-flex;
	border: 1px solid var(--border);
	border-radius: 999px;
	overflow: hidden;
}

.lang-toggle button {
	background: transparent;
	border: none;
	color: var(--muted);
	padding: 0.35rem 0.9rem;
	font-weight: 600;
	cursor: pointer;
}

.lang-toggle button.active {
	color: var(--text);
	background: linear-gradient(120deg, rgba(139, 92, 246, 0.3), rgba(34, 211, 238, 0.2));
}

main {
	padding: clamp(2rem, 6vw, 5rem);
	display: flex;
	flex-direction: column;
	gap: 3.5rem;
}

.hero,
.sub-hero,
.contact-hero {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
	gap: 3rem;
	align-items: center;
}

.hero-content h1,
.sub-hero h1,
.contact-hero h1 {
	font-size: clamp(2rem, 4vw, 3.5rem);
	line-height: 1.1;
	margin-bottom: 1rem;
}

.lead {
	font-size: 1.1rem;
	color: var(--muted);
}

.eyebrow {
	letter-spacing: 0.2em;
	text-transform: uppercase;
	font-size: 0.75rem;
	color: var(--accent-2);
	margin-bottom: 0.75rem;
}

.hero-cta,
.cta {
	display: flex;
	gap: 1rem;
	flex-wrap: wrap;
	align-items: center;
}

.btn {
	border-radius: 999px;
	padding: 0.85rem 1.75rem;
	font-weight: 600;
	border: 1px solid transparent;
	text-decoration: none;
	cursor: pointer;
	transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn.primary {
	background: linear-gradient(120deg, var(--accent), var(--accent-2));
	color: #05060c;
	box-shadow: 0 10px 25px rgba(34, 211, 238, 0.25);
}

.btn.ghost {
	border-color: rgba(255, 255, 255, 0.25);
	color: var(--text);
}

.btn:hover {
	transform: translateY(-2px);
}

.hero-visual {
	position: relative;
	width: min(420px, 70vw);
	aspect-ratio: 1;
	margin-inline: auto;
}

.halo {
	position: absolute;
	inset: 5%;
	border-radius: 50%;
	border: 1px dashed rgba(255, 255, 255, 0.15);
}

.nodes span {
	position: absolute;
	width: 12px;
	height: 12px;
	border-radius: 50%;
	background: var(--accent-2);
	animation: pulse 4s infinite ease-in-out;
}

.nodes span:nth-child(1) {
	top: 15%;
	left: 20%;
}

.nodes span:nth-child(2) {
	top: 35%;
	right: 15%;
	animation-delay: 0.8s;
}

.nodes span:nth-child(3) {
	bottom: 20%;
	left: 30%;
	animation-delay: 1.4s;
}

.nodes span:nth-child(4) {
	bottom: 10%;
	right: 25%;
	animation-delay: 2s;
}

.sphere {
	position: absolute;
	inset: 25%;
	border-radius: 50%;
	background: radial-gradient(circle, rgba(139, 92, 246, 0.5), transparent 60%);
	display: grid;
	place-items: center;
}

.sphere-ring {
	width: 80%;
	height: 80%;
	border-radius: 50%;
	border: 1px solid rgba(255, 255, 255, 0.2);
	animation: spin 12s linear infinite;
}

.sphere-core {
	width: 40%;
	height: 40%;
	border-radius: 50%;
	background: radial-gradient(circle, rgba(34, 211, 238, 0.8), rgba(139, 92, 246, 0.4));
}

.metrics {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
	gap: 1rem;
}

.metrics article,
.value-cards article,
.timeline article,
.industry-grid article,
.use-case-grid article,
.team-grid article,
.culture-grid article,
.principle-list article,
.contact-cards article,
.contact-info article {
	background: var(--surface);
	border: 1px solid var(--border);
	border-radius: var(--radius);
	padding: 1.5rem;
	box-shadow: var(--shadow);
}

.value-grid,
.evolution,
.industries,
.team,
.culture,
.process,
.dual-column,
.use-case-grid,
.capability-grid,
.story,
.principles,
.contact-body {
	background: rgba(11, 13, 25, 0.8);
	border-radius: calc(var(--radius) + 4px);
	padding: clamp(1.5rem, 4vw, 3rem);
	border: 1px solid var(--border);
	box-shadow: var(--shadow);
}

.section-heading h2 {
	font-size: clamp(1.75rem, 3vw, 2.5rem);
	margin: 0.25rem 0 0.75rem;
}

.value-cards,
.timeline,
.industry-grid,
.use-case-grid,
.team-grid,
.culture-grid,
.principle-list,
.capability-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
	gap: 1.5rem;
}

.timeline article {
	border-left: 3px solid rgba(255, 255, 255, 0.08);
}

.industry-grid article h3,
.use-case-grid article h3,
.team-grid article h3,
.culture-grid article h3,
.principle-list article h3 {
	margin-top: 0;
}

.cta {
	justify-content: space-between;
	background: linear-gradient(120deg, rgba(139, 92, 246, 0.2), rgba(34, 211, 238, 0.1));
	border-radius: var(--radius);
	padding: clamp(1.5rem, 4vw, 3rem);
	border: 1px solid rgba(255, 255, 255, 0.1);
}

.cta.slim {
	flex-direction: column;
	align-items: flex-start;
	gap: 1rem;
}

.panel-stack {
	display: grid;
	gap: 1rem;
}

.panel-stack .panel {
	height: 70px;
	border-radius: var(--radius);
	border: 1px solid var(--border);
	background: rgba(255, 255, 255, 0.03);
	box-shadow: var(--shadow);
}

.dual-column {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
	gap: 2rem;
}

.dual-column ul {
	margin: 0;
	padding-left: 1.25rem;
	color: var(--muted);
}

.story-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
	gap: 1.5rem;
}

.principle-list article {
	text-align: center;
}

.vision-card {
	background: var(--surface);
	border-radius: var(--radius);
	padding: 2rem;
	border: 1px solid var(--border);
	box-shadow: var(--shadow);
}

.contact-cards {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
	gap: 1rem;
}

.contact-body {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
	gap: 2rem;
}

.contact-form {
	display: flex;
	flex-direction: column;
	gap: 1.5rem;
}

.contact-form label {
	display: flex;
	flex-direction: column;
	gap: 0.4rem;
	font-weight: 500;
}

.contact-form input,
.contact-form textarea {
	border-radius: 16px;
	border: 1px solid var(--border);
	background: rgba(255, 255, 255, 0.02);
	color: var(--text);
	padding: 0.9rem 1.1rem;
	font-size: 1rem;
}

.form-footer {
	display: flex;
	flex-wrap: wrap;
	justify-content: space-between;
	gap: 1rem;
	align-items: center;
	color: var(--muted);
}

.form-status {
	margin: 0;
	color: var(--accent-2);
	font-weight: 500;
}

[data-animate] {
	opacity: 0;
	transform: translateY(60px) scale(0.98);
	transition: opacity 0.9s ease, transform 0.9s ease;
}

[data-animate].is-visible {
	opacity: 1;
	transform: translateY(0) scale(1);
}

[data-tilt] {
	position: relative;
	transition: transform 0.25s ease, border-color 0.3s ease, box-shadow 0.3s ease;
	will-change: transform;
	transform-style: preserve-3d;
}

[data-tilt]::after {
	content: '';
	position: absolute;
	inset: 0;
	border-radius: inherit;
	background: radial-gradient(
		circle at var(--glow-x, 50%) var(--glow-y, 50%),
		rgba(255, 255, 255, 0.15),
		transparent 55%
	);
	opacity: 0;
	transition: opacity 0.3s ease;
	pointer-events: none;
}

[data-tilt].tilt-active {
	border-color: rgba(255, 255, 255, 0.2);
	box-shadow: 0 25px 50px rgba(3, 4, 20, 0.55);
}

[data-tilt].tilt-active::after {
	opacity: 1;
}

.site-footer {
	padding: 2rem clamp(1.5rem, 5vw, 4rem);
	border-top: 1px solid var(--border);
	background: rgba(5, 6, 12, 0.85);
	display: flex;
	justify-content: space-between;
	flex-wrap: wrap;
	gap: 1rem;
	font-size: 0.9rem;
}

.site-footer p {
	margin: 0.25rem 0 0;
	color: var(--muted);
}

[data-lang] {
	display: none;
}

[data-lang][hidden] {
	display: none !important;
}

body.lang-en [data-lang="en"],
body.lang-zh [data-lang="zh"] {
	display: unset;
}

@media (prefers-reduced-motion: reduce) {
	[data-animate] {
		opacity: 1;
		transform: none;
	}
}

@keyframes pulse {
	0%,
	100% {
		opacity: 0.2;
		transform: scale(0.9);
	}
	50% {
		opacity: 1;
		transform: scale(1.25);
	}
}

@keyframes spin {
	to {
		transform: rotate(360deg);
	}
}

@media (max-width: 900px) {
	.site-header {
		flex-direction: column;
		align-items: flex-start;
	}
	.site-nav {
		flex-wrap: wrap;
	}
	.cta,
	.hero-cta {
		flex-direction: column;
		align-items: flex-start;
	}
}

@media (max-width: 600px) {
	.site-header {
		position: static;
	}
	main {
		padding: 1.5rem;
	}
	.site-footer {
		flex-direction: column;
	}
}