.tu-header-inner {
	max-width: 760px;
}
.tu-h1 {
	font-size: clamp(34px, 4.4vw, 52px);
	line-height: 1.12;
	margin: 0 0 18px;
}
.tu-lede {
	margin: 0 0 14px;
}
.tu-updated {
	font-family: var(--mono);
	font-size: 13px;
	font-weight: 500;
	letter-spacing: 0.04em;
	color: var(--ink-faint);
	margin: 0;
}

.tu-layout {
	display: grid;
	grid-template-columns: 260px 1fr;
	gap: 64px;
	align-items: start;
}

.tu-toc {
	position: sticky;
	top: 126px;
	max-height: calc(100vh - 160px);
	overflow-y: auto;
	padding: 22px 22px 24px;
	background: var(--card);
	border: 1px solid var(--line);
	border-radius: var(--radius-lg);
}
.tu-toc-label {
	font-family: var(--mono);
	font-size: 12px;
	font-weight: 600;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	color: var(--brand-text);
	margin: 0 0 14px;
}
.tu-toc ul {
	list-style: none;
	margin: 0;
	padding: 0;
	display: flex;
	flex-direction: column;
	gap: 2px;
}
.tu-toc a {
	display: block;
	padding: 7px 0;
	font-size: 14.5px;
	line-height: 1.4;
	color: var(--ink-soft);
	border-left: 2px solid transparent;
	padding-left: 12px;
	margin-left: -12px;
	transition: color .2s var(--ease), border-color .2s var(--ease);
}
.tu-toc a:hover,
.tu-toc a:focus-visible {
	color: var(--ink);
	border-left-color: var(--line);
}

.tu-content {
	max-width: 720px;
	color: var(--ink-soft);
	font-size: 16px;
	line-height: 1.72;
}
.tu-content h2 {
	font-family: var(--display);
	font-weight: 700;
	color: var(--ink);
	font-size: 23px;
	line-height: 1.3;
	letter-spacing: -0.01em;
	margin: 48px 0 16px;
	scroll-margin-top: 126px;
}
.tu-content h2:first-child {
	margin-top: 0;
}
.tu-content p {
	margin: 0 0 18px;
}
.tu-content p:last-child {
	margin-bottom: 0;
}
.tu-content strong {
	color: var(--ink);
	font-weight: 600;
}
.tu-list,
.tu-contact-list {
	margin: 0 0 18px;
	padding-left: 22px;
	display: flex;
	flex-direction: column;
	gap: 8px;
}
.tu-content ul:last-child {
	margin-bottom: 0;
}
.tu-contact-list {
	list-style: none;
	padding-left: 0;
	gap: 6px;
}
.tu-contact-list a {
	color: var(--brand-text);
	font-weight: 600;
}
.tu-contact-list a:hover {
	color: var(--brand-deep);
}

@media (max-width: 980px) {
	.tu-layout {
		grid-template-columns: 1fr;
		gap: 36px;
	}
	.tu-toc {
		position: static;
	}
}

@media (max-width: 640px) {
	.tu-content {
		font-size: 15.5px;
	}
	.tu-content h2 {
		font-size: 20px;
		margin: 38px 0 14px;
	}
}