/* Chinese typography deltas.
   These are design decisions, not translation: Chinese never takes uppercase
   or wide tracking, its body line-height rises to 1.85, headings drop to
   weight 700 and sit flush at margin-left 0, and ch-based measures are about
   0.6x the English value because CJK glyphs are full-width.

   Scoped to the document language so the markup stays one component tree.
   Numerals (metric figures, stat figures, index numbers) deliberately stay
   in Archivo 800 with tabular numerals in both languages. */

:root[lang^="zh"] body {
	font-family: "Noto Sans SC", var(--font-body);
	line-height: 1.85;
}

:root[lang^="zh"] h1,
:root[lang^="zh"] h2,
:root[lang^="zh"] h3,
:root[lang^="zh"] h4 {
	font-family: "Noto Sans SC", var(--font-heading);
	font-weight: 700;
}

/* — labels: no uppercase, tracking reduced or dropped ——————————— */

:root[lang^="zh"] .yt-eyebrow,
:root[lang^="zh"] .yt-meta,
:root[lang^="zh"] .yt-contact-label,
:root[lang^="zh"] .yt-form-eyebrow,
:root[lang^="zh"] .yt-field label,
:root[lang^="zh"] .yt-foot-title,
:root[lang^="zh"] .yt-filter-label,
:root[lang^="zh"] .yt-panel-label,
:root[lang^="zh"] .yt-fact-label,
:root[lang^="zh"] .yt-crumb,
:root[lang^="zh"] .yt-next-label {
	text-transform: none;
	letter-spacing: 0.08em;
}

:root[lang^="zh"] .yt-metric-label,
:root[lang^="zh"] .yt-stat-label,
:root[lang^="zh"] .yt-case-measure,
:root[lang^="zh"] .yt-spec-label {
	text-transform: none;
	letter-spacing: 0;
	line-height: 1.6;
}

:root[lang^="zh"] .yt-link,
:root[lang^="zh"] .yt-submit,
:root[lang^="zh"] .yt-next-read {
	text-transform: none;
	letter-spacing: 0.04em;
	font-size: 14.5px;
	font-weight: 500;
}

:root[lang^="zh"] .yt-submit {
	font-weight: 600;
}

/* — headings ——————————————————————————————————————————————————— */

:root[lang^="zh"] .yt-h1 {
	font-size: clamp(34px, 5vw, 68px);
	line-height: 1.18;
	letter-spacing: 0.005em;
	margin-left: 0;
}

:root[lang^="zh"] .yt-h2 {
	font-size: clamp(26px, 3.2vw, 38px);
	line-height: 1.3;
	letter-spacing: 0;
	margin-left: 0;
}

:root[lang^="zh"] .yt-h2-sub {
	font-size: clamp(24px, 2.8vw, 34px);
	line-height: 1.35;
}

:root[lang^="zh"] .yt-h3 {
	font-size: clamp(18px, 1.8vw, 23px);
	line-height: 1.4;
	letter-spacing: 0;
}

:root[lang^="zh"] .yt-cap h3 {
	font-size: 18px;
	line-height: 1.5;
	letter-spacing: 0;
}

:root[lang^="zh"] .yt-step-title {
	font-family: "Noto Sans SC", var(--font-heading);
	font-weight: 700;
	font-size: 16.5px;
}

:root[lang^="zh"] .yt-cap-heading {
	max-width: 12ch;
}

/* Archivo has no CJK: without Noto named here, a unit such as 周 in a
   figure falls through to the system face and reads as a different font */
:root[lang^="zh"] .yt-stat-figure,
:root[lang^="zh"] .yt-case-figure,
:root[lang^="zh"] .yt-metric-figure,
:root[lang^="zh"] .yt-lib-metric-figure,
:root[lang^="zh"] .yt-spec-figure {
	font-family: Archivo, "Noto Sans SC", sans-serif;
}

:root[lang^="zh"] .yt-case-lead .yt-case-title {
	font-size: clamp(24px, 2.6vw, 34px);
	line-height: 1.35;
	letter-spacing: 0;
}

:root[lang^="zh"] .yt-method-heading {
	max-width: 16ch;
}

/* — body copy: line-height up, measures down ————————————————————— */

:root[lang^="zh"] .yt-lede {
	font-size: 16.5px;
	line-height: 1.85;
	max-width: 34ch;
}

:root[lang^="zh"] .yt-head-lede {
	font-size: 15.5px;
	line-height: 1.85;
	max-width: 34ch;
}

:root[lang^="zh"] .yt-case-text,
:root[lang^="zh"] .yt-row-text {
	font-size: 15px;
	line-height: 1.85;
	max-width: 34ch;
}

:root[lang^="zh"] .yt-cap p {
	font-size: 14.5px;
	line-height: 1.85;
}

:root[lang^="zh"] .yt-step p {
	font-size: 14.5px;
	line-height: 1.85;
	max-width: 30ch;
}

:root[lang^="zh"] .yt-note {
	line-height: 1.7;
}

:root[lang^="zh"] .yt-metric-label,
:root[lang^="zh"] .yt-stat-label {
	font-size: 12.5px;
}

:root[lang^="zh"] .yt-stat-label {
	font-size: 13px;
}

/* — cards ——————————————————————————————————————————————————————— */

:root[lang^="zh"] .card-title {
	font-family: "Noto Sans SC", var(--font-heading);
	font-weight: 700;
	line-height: 1.5;
	letter-spacing: 0;
}

:root[lang^="zh"] .card-body {
	line-height: 1.85;
}

/* — contact banner and form ————————————————————————————————————— */

:root[lang^="zh"] .yt-contact-h2 {
	font-size: clamp(28px, 4vw, 48px);
	line-height: 1.25;
	letter-spacing: 0;
	margin-left: 0;
}

:root[lang^="zh"] .yt-contact-body {
	font-size: 16px;
	line-height: 1.85;
	max-width: 32ch;
}

:root[lang^="zh"] .yt-contact-label,
:root[lang^="zh"] .yt-field label {
	font-size: 12.5px;
}

:root[lang^="zh"] .yt-contact-link {
	font-size: clamp(17px, 1.9vw, 22px);
}

:root[lang^="zh"] .yt-contact-addr {
	font-size: 15px;
	line-height: 1.75;
}

:root[lang^="zh"] .yt-form-msg {
	max-width: 32ch;
}

/* — navigation and footer —————————————————————————————————————— */

:root[lang^="zh"] .yt-nav-links {
	font-size: 14.5px;
}

:root[lang^="zh"] .yt-foot-title {
	font-family: "Noto Sans SC", var(--font-heading);
	font-weight: 700;
	font-size: 13px;
}

:root[lang^="zh"] .yt-foot-links {
	font-size: 14px;
}

/* — case library ——————————————————————————————————————————————— */

:root[lang^="zh"] .yt-lib-h1 {
	font-size: clamp(30px, 4.4vw, 56px);
	line-height: 1.25;
	letter-spacing: 0;
	margin-left: 0;
}

:root[lang^="zh"] .yt-lib-lede {
	line-height: 1.85;
	max-width: 30ch;
}

:root[lang^="zh"] .yt-lib-title {
	font-family: "Noto Sans SC", var(--font-heading);
	font-weight: 700;
	font-size: clamp(18px, 1.8vw, 23px);
	line-height: 1.4;
	letter-spacing: 0;
}

:root[lang^="zh"] .yt-chip {
	font-size: 13.5px;
	letter-spacing: 0;
}

:root[lang^="zh"] .yt-panel-text,
:root[lang^="zh"] .yt-decision-text {
	line-height: 1.85;
}

:root[lang^="zh"] .yt-btn-solid,
:root[lang^="zh"] .yt-link-accent {
	font-size: 14px;
	letter-spacing: 0;
}

/* — case detail ———————————————————————————————————————————————— */

:root[lang^="zh"] .yt-detail-h1 {
	font-size: clamp(30px, 4.4vw, 54px);
	line-height: 1.25;
	letter-spacing: 0;
	margin-left: 0;
}

:root[lang^="zh"] .yt-detail-lede {
	line-height: 1.85;
	max-width: 28ch;
}

:root[lang^="zh"] .yt-fact-value {
	font-size: 15px;
	line-height: 1.75;
}

:root[lang^="zh"] .yt-block-title {
	font-family: "Noto Sans SC", var(--font-heading);
	font-weight: 700;
	font-size: 18px;
	line-height: 1.5;
	letter-spacing: 0;
}

:root[lang^="zh"] .yt-block-body p {
	font-size: 16px;
	line-height: 1.85;
	max-width: 38ch;
}

:root[lang^="zh"] .yt-dec p {
	font-size: 15.5px;
	line-height: 1.85;
	max-width: 36ch;
}

:root[lang^="zh"] .yt-spec-note {
	line-height: 1.75;
}

:root[lang^="zh"] .yt-live-title {
	font-size: clamp(22px, 2.4vw, 30px);
	line-height: 1.35;
	letter-spacing: 0;
}

:root[lang^="zh"] .yt-live-body {
	line-height: 1.85;
	max-width: 34ch;
}

:root[lang^="zh"] .yt-next-title {
	font-family: "Noto Sans SC", var(--font-heading);
	font-weight: 700;
	font-size: clamp(18px, 1.8vw, 23px);
	line-height: 1.4;
	letter-spacing: 0;
}