:root {
	color-scheme: light;
	font-family: Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
	font-synthesis: none;
	--ink: #121311;
	--muted: #51554f;
	--paper: #f2f1ed;
	--signal: #b74336;
}

* { box-sizing: border-box; }

html,
body { min-height: 100%; }

body {
	min-height: 100svh;
	margin: 0;
	overflow-x: hidden;
	background: var(--paper) url('/images/robot-lab.webp') center / cover no-repeat;
	color: var(--ink);
}

body::before {
	position: fixed;
	inset: 0;
	z-index: -1;
	background: rgb(242 241 237 / 18%);
	content: '';
}

.site-header,
footer {
	position: fixed;
	z-index: 2;
	left: 0;
	width: 100%;
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding-inline: 48px;
}

.site-header { top: 0; height: 88px; }

.wordmark {
	display: inline-flex;
	align-items: center;
	gap: 14px;
	color: var(--ink);
	font-size: 13px;
	font-weight: 800;
	letter-spacing: 0;
	text-decoration: none;
}

.signal {
	display: block;
	width: 5px;
	height: 26px;
	background: var(--signal);
}

.status {
	display: flex;
	align-items: center;
	gap: 9px;
	margin: 0;
	color: var(--muted);
	font-size: 12px;
	font-weight: 700;
}

.status-dot {
	width: 7px;
	height: 7px;
	flex: 0 0 auto;
	border-radius: 50%;
	background: var(--signal);
}

.status-short { display: none; }

main {
	display: flex;
	align-items: center;
	min-height: 100svh;
	padding: 120px 48px 108px;
}

.intro { width: 560px; }

.kicker {
	margin: 0 0 24px;
	color: var(--signal);
	font-size: 11px;
	font-weight: 800;
	line-height: 1;
}

h1 {
	margin: 0;
	font-family: "Songti SC", SimSun, serif;
	font-size: 96px;
	font-weight: 700;
	line-height: 0.9;
	letter-spacing: 0;
}

.english-title {
	margin: 24px 0 0;
	font-size: 21px;
	font-weight: 800;
	letter-spacing: 0;
}

.copy {
	max-width: 470px;
	margin-top: 38px;
	padding-top: 22px;
	border-top: 1px solid rgb(18 19 17 / 30%);
}

.copy p {
	margin: 0;
	font-size: 16px;
	line-height: 1.55;
}

.copy p + p {
	margin-top: 7px;
	color: var(--muted);
	font-size: 14px;
}

footer {
	bottom: 0;
	height: 72px;
	color: var(--muted);
	font-size: 11px;
	font-weight: 700;
}

footer p { margin: 0; }

@media (max-width: 720px) {
	body {
		background-position: 60% center;
	}

	body::before { background: rgb(242 241 237 / 46%); }

	.site-header,
	footer { padding-inline: 22px; }

	.site-header { height: 72px; }

	.status { font-size: 11px; }
	.status-full { display: none; }
	.status-short { display: inline; }

	main {
		align-items: flex-end;
		padding: 104px 22px 88px;
	}

	.intro { width: 100%; }
	.kicker { margin-bottom: 18px; }

	h1 {
		font-size: 56px;
		line-height: 0.92;
	}

	.english-title { margin-top: 16px; font-size: 16px; }
	.copy { max-width: 340px; margin-top: 24px; padding-top: 16px; }
	.copy p { font-size: 14px; }
	.copy p + p { font-size: 12px; }
	footer { height: 58px; }
}

@media (max-height: 680px) and (min-width: 721px) {
	h1 { font-size: 72px; }
	.kicker { margin-bottom: 18px; }
	.copy { margin-top: 24px; }
}

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