/* --------------------------------------------------------------------------
   Revision: product-first HarmonyOS positioning.
   Loaded after style.css; keeps the shared components, tightens the visual
   language and replaces the editorial-poster treatment with a technical site.
   -------------------------------------------------------------------------- */

:root {
  --paper: #f7f6f2;
  --surface: #fffdf8;
  --surface-deep: #ece9e1;
  --ink: #171614;
  --ink-soft: #2c2a26;
  --muted: #605c54;
  --line: #d8d4ca;
  --line-soft: #e8e4db;
  --signal: #c9361c;
  --signal-bright: #ff7259;
  --max: 1200px;
  --gutter: clamp(1.25rem, 3vw, 4rem);
  --header-h: 64px;
}

body {
  font-size: 16px;
  line-height: 1.6;
}

h1,
h2,
h3,
h4 {
  font-stretch: 100%;
  letter-spacing: -0.028em;
  line-height: 1.1;
}

h1 {
  font-size: clamp(2.7rem, 5.1vw, 4.4rem);
  line-height: 1.03;
}

h2 {
  font-size: clamp(1.8rem, 3.1vw, 2.65rem);
  line-height: 1.14;
}

h3 {
  font-size: 1.15rem;
  line-height: 1.25;
}

.container {
  width: calc(100% - var(--gutter) * 2);
  max-width: var(--max);
  margin-inline: auto;
}

.mono {
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  text-transform: none;
}

.eyebrow {
  gap: 0;
  margin-bottom: 1rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.02em;
  text-transform: none;
  color: var(--muted);
}

.eyebrow::before {
  display: none;
}

.eyebrow--ink {
  color: #c6c0b5;
}

.section-label {
  font-size: 0.68rem;
  letter-spacing: 0.02em;
  text-transform: none;
}

.section-number,
.nav-num {
  display: none;
}

.section {
  padding-block: clamp(3.5rem, 6vw, 6rem);
}

.section--tint {
  background: var(--surface);
  border-block: 1px solid var(--line);
}

.section--tight {
  padding-block: clamp(2.25rem, 4vw, 3.5rem);
}

.section-head {
  display: block;
  margin-bottom: clamp(1.5rem, 3vw, 2.25rem);
}

.section-head__meta {
  display: none;
}

.section-title {
  max-width: none;
  font-size: clamp(1.9rem, 3.2vw, 2.8rem);
  font-stretch: 100%;
  line-height: 1.14;
  letter-spacing: -0.03em;
}

html[lang="zh-CN"] .section-title {
  font-size: clamp(1.9rem, 3.2vw, 2.8rem);
  letter-spacing: -0.025em;
}

.section-intro {
  max-width: 66ch;
  margin-top: 0.9rem;
  color: var(--muted);
  font-size: 0.98rem;
  line-height: 1.7;
}

.section-foot {
  display: flex;
  justify-content: flex-end;
  margin-top: 1.25rem;
}

/* Header */
.site-header {
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand-word {
  font-size: 0.86rem;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(1rem, 2.1vw, 1.8rem);
  margin-left: auto;
}

.nav-link {
  padding: 0.55rem 0;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 520;
}

.nav-link:hover,
.nav-link[aria-current="page"] {
  color: var(--ink);
}

.nav-link[aria-current="page"]::after {
  bottom: -0.35rem;
  height: 1px;
  background: var(--ink);
}

.header-actions {
  gap: 0.85rem;
}

.source-link {
  font-size: 0.58rem;
  letter-spacing: 0.02em;
  text-transform: none;
}

.lang-btn {
  min-height: 32px;
  font-size: 0.62rem;
  letter-spacing: 0;
}

.lang-toggle {
  border-color: var(--line);
}

.lang-btn + .lang-btn {
  border-left-color: var(--line);
}

.lang-btn[aria-pressed="true"] {
  background: var(--ink);
  color: var(--paper);
}

.nav-toggle {
  border-color: var(--line);
}

/* Hero */
.hero {
  overflow: visible;
  border-bottom: 0;
}

.hero::before,
.page-hero::after {
  display: none;
}

.hero > .container {
  position: relative;
}

.hero-topline {
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.6rem;
  letter-spacing: 0.04em;
  text-transform: none;
  color: var(--muted);
}

.hero-topline__right {
  color: var(--muted);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(390px, 0.7fr);
  align-items: start;
  gap: clamp(2rem, 5vw, 5rem);
  padding: clamp(3rem, 6vw, 6rem) 0 clamp(2.5rem, 4.5vw, 4.5rem);
}

.hero-title {
  max-width: none;
  margin: 0 0 1.5rem;
  font-size: clamp(2.9rem, 5.4vw, 5.6rem);
  font-stretch: 100%;
  font-weight: 720;
  line-height: 1.04;
  letter-spacing: -0.035em;
}

html[lang="zh-CN"] .hero-title {
  font-size: clamp(2.9rem, 5.4vw, 5.6rem);
  letter-spacing: -0.03em;
}

.hero-title .line {
  display: block;
}

.hero-title .line--indent {
  padding-left: 0;
}

.hero-title .signal {
  color: var(--signal);
}

.hero-lede {
  max-width: 48rem;
  margin: 0 0 1.8rem;
  color: var(--ink-soft);
  font-size: 1rem;
  line-height: 1.7;
}

.hero-copy .actions {
  gap: 1rem 1.5rem;
}

.hero-note {
  margin: 1.35rem 0 0;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.02em;
  line-height: 1.5;
}

.hero-note span + span::before {
  content: " / ";
  color: var(--line);
}

.hero-meta {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--line);
}

.hero-meta__item {
  padding: 0.8rem 0.8rem 0.85rem 0;
}

.hero-meta__item + .hero-meta__item {
  padding-left: 0.8rem;
}

.hero-meta__label {
  margin-bottom: 0.25rem;
  font-size: 0.56rem;
  letter-spacing: 0.02em;
  text-transform: none;
}

.hero-meta__value {
  font-size: 0.78rem;
  font-weight: 570;
}

/* Buttons */
.btn {
  min-height: 44px;
  gap: 1.5rem;
  padding: 0 0.95rem 0 1.05rem;
  border-color: var(--ink);
  font-size: 0.8rem;
}

.btn--primary {
  background: var(--ink);
}

.btn--primary:hover {
  background: var(--signal);
  border-color: var(--signal);
}

.link-arrow {
  font-size: 0.8rem;
  border-bottom-color: var(--line);
}

.link-arrow:hover {
  color: var(--signal);
  border-color: var(--signal);
}

/* Quick install panel */
.quick-install {
  border: 1px solid var(--ink);
  background: var(--surface);
}

.quick-install__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.8rem 0.9rem;
  border-bottom: 1px solid var(--line);
}

.quick-install__head .mono {
  display: block;
  margin-bottom: 0.2rem;
  color: var(--muted);
  font-size: 0.54rem;
}

.quick-install__head h2 {
  margin: 0;
  font-size: 0.96rem;
  font-weight: 650;
  letter-spacing: -0.015em;
}

.quick-install__head .copy-btn {
  min-height: 28px;
  flex: 0 0 auto;
}

.quick-install pre {
  margin: 0;
  padding: 0.95rem 1rem;
  overflow-x: auto;
  background: #fbfaf6;
  font-family: var(--font-mono);
  font-size: clamp(0.62rem, 0.9vw, 0.72rem);
  line-height: 1.75;
  tab-size: 2;
}

.quick-install code {
  font-family: var(--font-mono);
}

.quick-install__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.65rem 1rem;
  padding: 0.7rem 0.9rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.54rem;
  line-height: 1.4;
}

.quick-install__foot .link-arrow {
  font-family: var(--font-display);
  font-size: 0.75rem;
}

/* Two starting points */
.two-paths {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: start;
}

.path-card {
  min-width: 0;
  border-top: 2px solid var(--ink);
  padding-top: 0.9rem;
}

.path-label {
  margin: 0 0 0.55rem;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.56rem;
  letter-spacing: 0.02em;
}

.path-card h3 {
  max-width: none;
  margin: 0 0 0.6rem;
  font-size: clamp(1.2rem, 1.9vw, 1.55rem);
  line-height: 1.2;
}

.path-card > p {
  max-width: 52ch;
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.65;
}

.path-card .code-box {
  margin-top: 1rem;
}

.path-card .link-arrow {
  margin-top: 1rem;
}

.device-flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 1.1rem 0 0.9rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.device-step {
  min-width: 0;
  padding: 0.65rem 0.65rem 0.7rem 0;
  border-right: 1px solid var(--line);
}

.device-step:last-child {
  border-right: 0;
}

.device-step__num {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.5rem;
}

.device-step strong {
  display: block;
  margin-bottom: 0.2rem;
  font-size: 0.78rem;
  font-weight: 640;
  line-height: 1.3;
}

.device-step code {
  display: block;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.53rem;
  line-height: 1.45;
  overflow-wrap: anywhere;
}

.device-note {
  padding-left: 0.8rem;
  border-left: 2px solid var(--line);
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.55;
}

/* Scenario overview */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--ink);
}

.scenario-item {
  display: grid;
  grid-template-columns: 2.3rem minmax(0, 1fr);
  gap: 0.85rem;
  padding: 1.15rem 1.5rem 1.15rem 0;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
}

.scenario-item:nth-child(odd) {
  border-right: 1px solid var(--line);
}

.scenario-item:nth-child(even) {
  padding-left: 1.5rem;
}

.scenario-item__num {
  padding-top: 0.12rem;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.56rem;
}

.scenario-item h3 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
  font-weight: 640;
  line-height: 1.3;
}

.scenario-item p {
  margin: 0 0 0.55rem;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.55;
}

.scenario-item code {
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 0.55rem;
  line-height: 1.45;
}

.scenario-item:hover h3,
.scenario-item:hover .scenario-item__num {
  color: var(--signal);
}

/* Report screenshot */
.report-split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: start;
}

.report-copy h2 {
  max-width: none;
  margin: 0 0 1rem;
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-stretch: 100%;
  line-height: 1.14;
}

.report-copy > p {
  max-width: 46ch;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.7;
}

.report-copy .artifact-list {
  margin-top: 1.2rem;
}

.report-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: #fff;
}

.report-figure a {
  display: block;
}

.report-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.report-figure figcaption {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.4rem 1rem;
  padding: 0.55rem 0.7rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.52rem;
  line-height: 1.45;
}

/* Run modes */
.run-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: start;
}

.run-card {
  min-width: 0;
  border-top: 1px solid var(--ink);
  padding-top: 0.85rem;
}

.run-card h3 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
  font-weight: 650;
}

.run-card > p {
  margin: 0 0 0.8rem;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.6;
}

.run-card .code-box {
  margin-top: 0.8rem;
}

.run-card .text-link {
  display: inline-block;
  margin-top: 0.8rem;
}

/* Compact footer */
.site-footer {
  margin-top: 0;
  padding: 2.5rem 0 1.5rem;
  background: var(--paper);
  color: var(--ink);
  border-top: 1px solid var(--ink);
  overflow: visible;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: start;
}

.footer-brand .brand {
  margin-bottom: 0.65rem;
}

.footer-desc {
  max-width: 40ch;
  margin: 0;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.65;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2rem;
}

.footer-col h3 {
  margin: 0 0 0.55rem;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.58rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  text-transform: none;
}

.footer-col a {
  margin-bottom: 0.35rem;
  color: var(--ink);
  font-size: 0.78rem;
}

.footer-col a:hover {
  color: var(--signal);
}

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  margin-top: 2.25rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.55rem;
  letter-spacing: 0.02em;
  text-transform: none;
}

.footer-meta a {
  color: var(--ink);
}

.footer-meta a:hover {
  color: var(--signal);
}

/* Common documentation components */
.article-block {
  gap: clamp(1.5rem, 4vw, 3.5rem);
  padding-block: clamp(1.6rem, 3vw, 2.4rem);
}

.article-block h3 {
  margin-bottom: 0.65rem;
  font-size: clamp(1.05rem, 1.7vw, 1.35rem);
}

.article-block p {
  font-size: 0.9rem;
  line-height: 1.65;
}

.article-block li {
  font-size: 0.87rem;
}

.callout {
  margin-top: 1.5rem;
  padding: 0.75rem 0 0.75rem 1rem;
  border-left: 2px solid var(--line);
}

.callout p {
  font-size: 0.88rem;
  line-height: 1.65;
}

.steps {
  border-top-color: var(--line);
}

.step {
  grid-template-columns: 3.2rem minmax(0, 1.2fr) minmax(0, 1fr);
  padding: clamp(1rem, 2vw, 1.4rem) 0;
}

.step__title {
  font-size: clamp(1.15rem, 1.8vw, 1.45rem);
}

.step__copy {
  font-size: 0.86rem;
}

.step__num {
  font-size: 0.58rem;
}

.sticky-head h2 {
  max-width: 16ch;
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-stretch: 100%;
  line-height: 1.15;
}

html[lang="zh-CN"] .sticky-head h2 {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
}

.sticky-head p {
  max-width: 40ch;
  font-size: 0.9rem;
}

.code-box pre {
  font-size: clamp(0.64rem, 0.9vw, 0.75rem);
}

.code-top {
  font-size: 0.5rem;
  letter-spacing: 0.02em;
  text-transform: none;
}

/* Interior page hero */
.page-hero {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

.page-hero__top {
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.58rem;
  letter-spacing: 0.03em;
  text-transform: none;
  color: var(--muted);
}

.page-hero__body {
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.6fr);
  gap: clamp(2rem, 5vw, 6rem);
  align-items: end;
  padding: clamp(2.75rem, 5.5vw, 5rem) 0 clamp(2rem, 3.5vw, 3rem);
}

.page-hero h1 {
  max-width: none;
  font-size: clamp(2.6rem, 4.6vw, 4.6rem);
  font-stretch: 100%;
  line-height: 1.06;
  letter-spacing: -0.035em;
}

html[lang="zh-CN"] .page-hero h1 {
  font-size: clamp(2.6rem, 4.6vw, 4.6rem);
  letter-spacing: -0.03em;
}

.page-hero__aside {
  max-width: 30rem;
  padding-bottom: 0;
}

.page-hero__aside p {
  margin-bottom: 0.8rem;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.7;
}

.page-hero__aside .mono {
  font-size: 0.58rem;
}

.page-hero__foot {
  padding: 0.65rem 0;
  border-top-color: var(--line);
  font-size: 0.53rem;
  letter-spacing: 0.02em;
  text-transform: none;
}

/* Tables and scenarios */
.compare {
  font-size: 0.83rem;
}

.compare th,
.compare td {
  padding: 0.7rem 0.7rem 0.7rem 0;
}

.compare thead th {
  font-size: 0.52rem;
  letter-spacing: 0.02em;
  text-transform: none;
}

.scenario-layout {
  grid-template-columns: 10rem minmax(0, 1fr);
  gap: clamp(1.5rem, 3.5vw, 3.5rem);
}

.scenario-article {
  padding-bottom: clamp(2.5rem, 5vw, 4rem);
  border-bottom-color: var(--line);
}

.scenario-article + .scenario-article {
  padding-top: clamp(2.5rem, 5vw, 4rem);
}

.scenario-head h2 {
  max-width: 21ch;
  font-size: clamp(1.7rem, 2.8vw, 2.5rem);
  font-stretch: 100%;
  line-height: 1.12;
  letter-spacing: -0.03em;
}

html[lang="zh-CN"] .scenario-head h2 {
  font-size: clamp(1.7rem, 2.8vw, 2.5rem);
  letter-spacing: -0.025em;
}

.scenario-intro {
  font-size: 0.95rem;
}

.scenario-cols {
  gap: clamp(1.5rem, 3.5vw, 3rem);
}

.scenario-cols h3 {
  font-size: 0.92rem;
}

.scenario-cols p,
.scenario-cols li {
  font-size: 0.85rem;
}

.boundary-box {
  padding: 0.65rem 0;
}

.boundary-box__row {
  padding: 0.35rem 0;
}

/* MCP page */
.mcp-copy h2 {
  max-width: 13ch;
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-stretch: 100%;
  line-height: 1.14;
}

html[lang="zh-CN"] .mcp-copy h2 {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
}

.mcp-copy p {
  font-size: 0.9rem;
}

.flow {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.flow-node {
  min-height: 118px;
  padding: 0.8rem 0.65rem 0.9rem 0;
}

.flow-node__index {
  margin-bottom: 1.2rem;
  font-size: 0.52rem;
}

.flow-node strong {
  font-size: 0.78rem;
}

.flow-node span:last-child {
  font-size: 0.68rem;
}

.tool-group__head h3 {
  font-size: 0.92rem;
}

.tool-list li {
  font-size: 0.58rem;
}

/* Project page */
.statement-section {
  padding-block: clamp(2.5rem, 5vw, 4rem);
}

.statement {
  max-width: 22ch;
  font-size: clamp(1.9rem, 3.5vw, 3rem);
  font-stretch: 100%;
  line-height: 1.12;
  letter-spacing: -0.03em;
}

html[lang="zh-CN"] .statement {
  font-size: clamp(1.9rem, 3.5vw, 3rem);
  letter-spacing: -0.025em;
}

.statement-foot {
  margin-top: 1.75rem;
  padding-top: 0.8rem;
}

.statement-foot p {
  font-size: 0.95rem;
  line-height: 1.65;
}

.stack-row {
  grid-template-columns: 3.4rem minmax(12rem, 0.85fr) minmax(0, 1.15fr);
  padding: 0.85rem 0;
}

.stack-row__name {
  font-size: 0.98rem;
}

.stack-row__copy {
  font-size: 0.82rem;
}

.status-row {
  padding: 0.65rem 0;
}

.status-row__label {
  font-size: 0.84rem;
}

.queue-title {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
}

.faq summary {
  padding: 0.9rem 0;
  font-size: 1rem;
}

/* End-of-page link is a normal continuation, not a poster. */
.next-link {
  padding-block: clamp(2rem, 4vw, 3rem);
  border-top: 1px solid var(--ink);
}

.next-link h2 {
  max-width: 18ch;
  font-size: clamp(1.8rem, 3.2vw, 2.6rem);
  font-stretch: 100%;
  line-height: 1.12;
}

html[lang="zh-CN"] .next-link h2 {
  font-size: clamp(1.8rem, 3.2vw, 2.6rem);
}

.next-link__arrow {
  font-size: 1.4rem;
}

/* Reveal animations add no information; keep content stable. */
.js .reveal,
.js .reveal.is-visible,
.js .reveal--now {
  opacity: 1;
  transform: none;
  transition: none;
  animation: none;
}

/* Responsive */
@media (max-width: 1024px) {
  .source-link {
    display: none;
  }

  .site-nav {
    gap: 1rem;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(340px, 0.8fr);
    gap: 2.5rem;
  }
}

@media (max-width: 960px) {
  :root {
    --header-h: 64px;
  }

  .site-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    z-index: 99;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin: 0;
    padding: 0.35rem var(--gutter) 1rem;
    border-bottom: 1px solid var(--ink);
    background: var(--paper);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: opacity 160ms var(--ease), transform 160ms var(--ease),
      visibility 160ms;
  }

  .site-nav.is-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--line);
    font-size: 0.92rem;
  }

  .nav-link[aria-current="page"]::after {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding-top: 2.5rem;
  }

  .quick-install {
    max-width: 620px;
  }

  .hero-meta {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-meta__item:nth-child(3) {
    padding-left: 0;
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .hero-meta__item:nth-child(4) {
    border-top: 1px solid var(--line);
  }

  .hero-meta__item:nth-child(3),
  .hero-meta__item:nth-child(4) {
    padding-top: 0.8rem;
  }

  .page-hero__body {
    grid-template-columns: 1fr;
    gap: 1.25rem;
    align-items: start;
  }

  .page-hero h1 {
    max-width: none;
  }

  .two-paths,
  .run-grid,
  .report-split {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .report-figure {
    max-width: 720px;
  }

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

  .scenario-item:nth-child(odd) {
    border-right: 0;
  }

  .scenario-item:nth-child(even) {
    padding-left: 0;
  }

  .scenario-layout {
    grid-template-columns: 1fr;
  }

  .scenario-rail {
    display: none;
  }

  .step {
    grid-template-columns: 2.4rem minmax(0, 1fr);
    gap: 0.55rem 1rem;
  }

  .step__copy {
    grid-column: 2;
  }

  .flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .flow-node:nth-child(3) {
    border-left: 0;
  }

  .flow-node:nth-child(4),
  .flow-node:nth-child(5) {
    border-top: 1px solid var(--line);
  }

  .flow-node:nth-child(4) {
    border-left: 0;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-links {
    max-width: 28rem;
  }
}

@media (max-width: 640px) {
  :root {
    --gutter: 1.15rem;
  }

  body {
    font-size: 15px;
  }

  .header-inner {
    gap: 0.65rem;
  }

  .brand-word {
    font-size: 0.8rem;
  }

  .brand-mark {
    width: 17px;
    height: 17px;
  }

  .lang-btn {
    min-width: 36px;
    min-height: 38px;
  }

  .nav-toggle {
    width: 38px;
    height: 38px;
  }

  .hero-grid {
    padding-top: 2rem;
  }

  .hero-title {
    font-size: clamp(1.95rem, 9.6vw, 3.4rem);
    line-height: 1.06;
  }

  html[lang="zh-CN"] .hero-title {
    font-size: clamp(1.95rem, 9.6vw, 3.4rem);
  }

  .hero-lede {
    font-size: 0.95rem;
  }

  .quick-install pre {
    font-size: 0.58rem;
  }

  .hero-meta {
    grid-template-columns: 1fr 1fr;
  }

  .hero-meta__value {
    white-space: normal;
  }

  .page-hero h1,
  html[lang="zh-CN"] .page-hero h1 {
    max-width: none;
    font-size: clamp(1.9rem, 9.3vw, 3.1rem);
    line-height: 1.08;
  }

  .page-hero__foot {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.35rem;
  }

  .device-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .device-step:nth-child(2) {
    border-right: 0;
  }

  .device-step:nth-child(3),
  .device-step:nth-child(4) {
    border-top: 1px solid var(--line);
  }

  .device-step:nth-child(3) {
    padding-left: 0;
  }

  .quick-install__foot {
    align-items: flex-start;
    flex-direction: column;
  }

  .report-copy h2,
  .mcp-copy h2,
  .sticky-head h2 {
    font-size: clamp(1.65rem, 7.6vw, 2.3rem);
  }

  .stack-row {
    grid-template-columns: 2rem minmax(0, 1fr);
    gap: 0.35rem 0.85rem;
  }

  .stack-row__copy {
    grid-column: 2;
  }

  .status-row {
    grid-template-columns: 1.2rem minmax(0, 1fr);
  }

  .status-row__state {
    grid-column: 2;
    text-align: left;
  }

  .footer-links {
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
  }

  .footer-meta {
    align-items: flex-start;
    flex-direction: column;
  }

  .next-link {
    align-items: flex-start;
  }

  .next-link__arrow {
    padding-top: 0.25rem;
  }
}

@media print {
  .site-header,
  .site-footer,
  .quick-install,
  .copy-btn,
  .next-link {
    display: none !important;
  }

  body {
    background: #fff;
  }
}

/* Install page */
.install-content {
  min-width: 0;
}

.install-section {
  padding: 1.75rem 0 2.35rem;
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h) + 1.5rem);
}

.install-section:first-child {
  padding-top: 0;
  border-top: 0;
}

.install-section h2 {
  max-width: none;
  margin: 0 0 0.75rem;
  font-size: clamp(1.45rem, 2.3vw, 2rem);
  line-height: 1.16;
}

.install-section > p {
  max-width: 64ch;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.7;
}

.install-section .code-box,
.install-section .setup-detail {
  margin-top: 1rem;
}

.requirements {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 1.5rem;
  margin: 1rem 0;
  border-top: 1px solid var(--line);
}

.requirement {
  padding: 0.8rem 0 0.85rem;
  border-bottom: 1px solid var(--line);
}

.requirement strong {
  display: block;
  margin-bottom: 0.2rem;
  font-size: 0.86rem;
  font-weight: 650;
}

.requirement p {
  margin: 0;
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.55;
}

.requirement a {
  color: var(--ink);
  text-decoration-color: var(--line);
}

.requirement a:hover {
  color: var(--signal);
}

.setup-detail {
  border: 1px solid var(--line);
  background: var(--surface);
}

.setup-detail summary {
  padding: 0.75rem 0.9rem;
  color: var(--ink-soft);
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
}

.setup-detail p {
  max-width: 66ch;
  margin: 0;
  padding: 0 0.9rem 0.85rem;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.65;
}

.setup-detail pre {
  margin: 0;
  padding: 0.8rem 0.9rem;
  overflow-x: auto;
  border-top: 1px solid var(--line);
  background: #fbfaf6;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  line-height: 1.65;
}

.tool-table {
  margin-top: 1.2rem;
  border-top: 1px solid var(--ink);
}

.tool-table__row {
  display: grid;
  grid-template-columns: 15rem minmax(0, 1fr);
  gap: 1rem;
  align-items: baseline;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--line);
}

.tool-table__row code {
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.62rem;
}

.tool-table__row span {
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.55;
}

.install-finish {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  margin-top: 2rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--ink);
}

.install-finish p {
  max-width: 42ch;
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
  line-height: 1.55;
}

@media (max-width: 960px) {
  .install-finish {
    align-items: flex-start;
    flex-direction: column;
    gap: 1rem;
  }
}

@media (max-width: 640px) {
  .requirements {
    grid-template-columns: 1fr;
  }

  .tool-table__row {
    grid-template-columns: 1fr;
    gap: 0.15rem;
  }

  .install-section {
    padding-block: 1.4rem 1.9rem;
  }
}

.report-figure figcaption a {
  color: var(--muted);
  text-decoration: none;
}

.report-figure figcaption a:hover {
  color: var(--signal);
}

@media (max-width: 720px) {
  .compare thead th:last-child,
  .compare tbody td:last-child {
    display: none;
  }

  .compare thead th:first-child,
  .compare tbody th {
    white-space: nowrap;
  }

  .compare th,
  .compare td {
    padding-right: 0.45rem;
    font-size: 0.76rem;
  }
}

/* Tool capability overview */
.tool-cap-list {
  border-top: 1px solid var(--ink);
}

.tool-cap-row {
  display: grid;
  grid-template-columns: 2.8rem minmax(0, 1fr) 1.2rem;
  gap: clamp(1rem, 2.5vw, 2rem);
  align-items: start;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  transition: color 160ms var(--ease);
}

.tool-cap-row__body {
  min-width: 0;
}

.tool-cap-row__count {
  padding-top: 0.1rem;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.58rem;
}

.tool-cap-row h3 {
  margin: 0 0 0.25rem;
  font-size: 1rem;
  font-weight: 650;
  line-height: 1.3;
}

.tool-cap-row p {
  margin: 0 0 0.35rem;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.55;
}

.tool-cap-row code {
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 0.55rem;
  line-height: 1.45;
}

.tool-cap-row__arrow {
  padding-top: 0.05rem;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  text-align: right;
}

.tool-cap-row:hover h3,
.tool-cap-row:hover .tool-cap-row__count,
.tool-cap-row:hover .tool-cap-row__arrow {
  color: var(--signal);
}

/* Tool detail page */
.cap-summary {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--line);
}

.cap-summary__item {
  padding: 0.8rem 0.8rem 0.85rem 0;
}

.cap-summary__item + .cap-summary__item {
  padding-left: 0.8rem;
  border-left: 1px solid var(--line);
}

.cap-summary__item b {
  display: block;
  margin-bottom: 0.2rem;
  color: var(--ink);
  font-size: 1.55rem;
  font-weight: 650;
  line-height: 1;
}

.cap-summary__item span {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.54rem;
  line-height: 1.4;
}

.tool-detail {
  border-top: 1px solid var(--ink);
}

.tool-detail__row {
  display: grid;
  grid-template-columns: minmax(13rem, 0.75fr) minmax(0, 1.25fr);
  gap: clamp(1rem, 3vw, 3rem);
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--line);
}

.tool-detail__name {
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.63rem;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.tool-detail__desc {
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.55;
}

.tool-detail__desc strong {
  color: var(--ink);
  font-weight: 600;
}

.tool-detail-note {
  margin-top: 1.5rem;
  padding-left: 0.8rem;
  border-left: 2px solid var(--line);
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.6;
}

.tool-detail-note code {
  color: var(--ink);
}

@media (max-width: 960px) {
  .tool-cap-row {
    grid-template-columns: 2.2rem minmax(0, 1fr) 1rem;
  }

  .tool-cap-row__arrow {
    grid-column: 3;
    grid-row: 1;
  }
}

@media (max-width: 640px) {
  .cap-summary {
    grid-template-columns: 1fr 1fr;
  }

  .cap-summary__item:nth-child(3) {
    padding-left: 0;
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .cap-summary__item:nth-child(4) {
    border-top: 1px solid var(--line);
  }

  .tool-detail__row {
    grid-template-columns: 1fr;
    gap: 0.2rem;
    padding: 0.65rem 0;
  }

  .tool-cap-row {
    grid-template-columns: 2rem minmax(0, 1fr) 1rem;
    gap: 0.5rem;
  }
}

.tool-subhead {
  margin: 1.4rem 0 0.45rem;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.tool-subhead + .tool-detail {
  margin-bottom: 0.5rem;
}

/* Wide editorial headers and full-bleed section rhythm */
.section--tint {
  background: var(--surface);
  border-block: 1px solid var(--line);
}

.section-head--wide {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.65fr);
  gap: 1.25rem clamp(2rem, 6vw, 8rem);
  align-items: end;
}

.section-head--wide .eyebrow {
  grid-column: 1 / -1;
  margin-bottom: 0;
}

.section-head--wide .section-title {
  grid-column: 1;
  margin: 0;
}

.section-head--wide .section-intro {
  grid-column: 2;
  max-width: 48ch;
  margin: 0 0 0.2rem;
}

@media (max-width: 960px) {
  .section-head--wide {
    display: block;
  }

  .section-head--wide .section-intro {
    margin-top: 0.9rem;
  }
}

/* In-page navigation for merged long-form pages */
.page-jump {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.4rem 1.2rem;
  padding: 0.9rem 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.page-jump__label {
  margin-right: 0.35rem;
  color: var(--muted);
}

.page-jump a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-jump a:hover,
.page-jump a:focus-visible {
  border-bottom-color: var(--ink);
}

/* --------------------------------------------------------------------------
   Visual refinement: sticky instrument header, blueprint fields, dark footer.
   Keeps the established Swiss technical language; adds structure and depth.
   -------------------------------------------------------------------------- */

::selection {
  background: var(--signal);
  color: var(--paper);
}

html {
  scroll-padding-top: calc(var(--header-h) + 1.5rem);
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

section[id],
article[id] {
  scroll-margin-top: calc(var(--header-h) + 1.5rem);
}

h1,
h2,
h3 {
  text-wrap: balance;
}

p {
  text-wrap: pretty;
}

h1,
h2 {
  font-stretch: 103%;
}

/* Keep navigation available on the long merged pages. */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  isolation: isolate;
  transition: box-shadow 220ms var(--ease), border-color 220ms var(--ease);
}

.site-header.is-scrolled {
  box-shadow: 0 12px 34px rgba(23, 22, 20, 0.07);
}

.scroll-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 2px;
  background: var(--signal);
  transform: scaleX(0);
  transform-origin: left center;
  pointer-events: none;
  z-index: 2;
}

/* Nav: animated hairline, red active marker. */
.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.18rem;
  height: 1px;
  background: var(--line);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 240ms var(--ease), background 160ms var(--ease);
}

.nav-link:hover::after {
  transform: scaleX(1);
}

.nav-link[aria-current="page"]::after {
  height: 2px;
  background: var(--signal);
  transform: scaleX(1);
}

/* Hero: a faint drafting grid, fading into the paper. */
.hero {
  position: relative;
  isolation: isolate;
}

.hero::before {
  display: block;
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(23, 22, 20, 0.035) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(23, 22, 20, 0.035) 1px, transparent 1px);
  background-size: 80px 80px;
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, #000 62%, transparent 100%);
  mask-image: linear-gradient(to bottom, #000 0%, #000 62%, transparent 100%);
}

.hero > .container {
  z-index: 1;
}

/* Interior hero: same field, tighter scale. */
.page-hero {
  background-color: var(--surface);
  background-image:
    linear-gradient(to right, rgba(23, 22, 20, 0.028) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(23, 22, 20, 0.028) 1px, transparent 1px);
  background-size: 80px 80px;
}

.page-hero > .container {
  position: relative;
  z-index: 1;
}

/* Small survey marks next to section labels. */
.hero .eyebrow::before,
.section-head .eyebrow::before,
.page-jump__label::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 5px;
  margin-right: 0.55rem;
  background: var(--signal);
  vertical-align: 0.12em;
}

.page-hero__top > span:first-child::before,
.hero-topline > span:first-child::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 5px;
  margin-right: 0.5rem;
  background: var(--signal);
  vertical-align: 0.1em;
}

/* The right-hand section note becomes a measured margin note. */
@media (min-width: 961px) {
  .section-head--wide .section-intro {
    padding-left: 1.35rem;
    border-left: 1px solid var(--line);
  }
}

/* Quick install reads as a physical instrument panel. */
.quick-install {
  position: relative;
  border-top: 2px solid var(--signal);
  box-shadow: 10px 10px 0 var(--surface-deep);
}

.quick-install__head .mono::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 5px;
  margin-right: 0.45rem;
  background: var(--signal);
  vertical-align: 0.12em;
}

.report-figure {
  box-shadow: 8px 8px 0 var(--surface-deep);
}

/* Tool reference rows: restrained hover with a signal rule. */
.tool-detail__row,
.tool-cap-row,
.scenario-item {
  transition: background 180ms var(--ease), box-shadow 180ms var(--ease);
}

.tool-detail__row:hover {
  background: rgba(23, 22, 20, 0.025);
  box-shadow: inset 2px 0 0 var(--signal);
}

.tool-cap-row:hover {
  background: rgba(23, 22, 20, 0.025);
  box-shadow: inset 2px 0 0 var(--signal);
}

/* Page-jump current section. */
.page-jump a.is-active {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

/* Dark closing frame. */
.site-footer {
  position: relative;
  background: #181613;
  color: #f1ece2;
  border-top: 1px solid rgba(241, 236, 226, 0.18);
  background-image:
    linear-gradient(to right, rgba(241, 236, 226, 0.018) 1px, transparent 1px);
  background-size: 120px 100%;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: var(--gutter);
  width: 72px;
  height: 2px;
  background: var(--signal-bright);
}

.site-footer .brand-word {
  color: #f1ece2;
}

.site-footer .brand-word span {
  color: #9d9587;
}

.site-footer .brand-mark i {
  background: #f1ece2;
}

.site-footer .brand-mark i:nth-child(2) {
  background: var(--signal-bright);
}

.site-footer .footer-desc {
  color: #b9b0a2;
}

.site-footer .footer-col h3 {
  color: #928a7c;
}

.site-footer .footer-col a {
  color: #e8e1d4;
}

.site-footer .footer-col a:hover,
.site-footer .footer-meta a:hover {
  color: var(--signal-bright);
}

.site-footer .footer-meta {
  border-top-color: rgba(241, 236, 226, 0.16);
  color: #928a7c;
}

.site-footer .footer-meta a {
  color: #d8d0c2;
}

/* Staggered entrance for the first viewport only. */
@keyframes enter-up {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: no-preference) {
  .js .hero .eyebrow,
  .js .hero-title,
  .js .hero-lede,
  .js .hero-copy .actions,
  .js .hero-note,
  .js .quick-install,
  .js .hero-meta__item,
  .js .page-hero h1,
  .js .page-hero__aside,
  .js .page-hero__foot {
    animation: enter-up 760ms cubic-bezier(0.16, 1, 0.3, 1) both;
  }

  .js .hero .eyebrow,
  .js .page-hero h1 {
    animation-delay: 40ms;
  }

  .js .hero-title {
    animation-delay: 90ms;
  }

  .js .hero-lede,
  .js .page-hero__aside {
    animation-delay: 150ms;
  }

  .js .hero-copy .actions,
  .js .page-hero__foot {
    animation-delay: 210ms;
  }

  .js .hero-note,
  .js .quick-install {
    animation-delay: 250ms;
  }

  .js .hero-meta__item {
    animation-delay: 300ms;
  }
}

@media (max-width: 640px) {
  .quick-install {
    box-shadow: 5px 5px 0 var(--surface-deep);
  }

  .report-figure {
    box-shadow: 4px 4px 0 var(--surface-deep);
  }

  .hero::before,
  .page-hero {
    background-size: 56px 56px;
  }
}

/* --------------------------------------------------------------------------
   Grand landing treatment: a warm ink hero, larger display type, and a
   light instrument panel that carries the install path.
   -------------------------------------------------------------------------- */

.hero {
  background: #171410;
  color: #f1ece2;
  border-bottom: 1px solid #2f2a23;
}

.hero::before {
  background-image:
    linear-gradient(to right, rgba(241, 236, 226, 0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(241, 236, 226, 0.05) 1px, transparent 1px);
}

.hero-topline {
  color: #a79e8f;
  border-bottom-color: rgba(241, 236, 226, 0.16);
}

.hero-topline__right {
  color: #8f877b;
}

.hero .eyebrow {
  color: #b7ae9f;
}

.hero-title {
  color: #f1ece2;
  font-size: clamp(3rem, 5.9vw, 6.2rem);
  font-stretch: 106%;
  line-height: 1.0;
}

html[lang="zh-CN"] .hero-title {
  font-size: clamp(3rem, 5.9vw, 6.2rem);
}

.hero-lede {
  color: #cfc7b8;
}

.hero-note {
  color: #9f9687;
}

.hero-note span + span::before {
  color: #4d463d;
}

.hero-copy .link-arrow {
  color: #f1ece2;
  border-bottom-color: rgba(241, 236, 226, 0.3);
}

.hero-copy .link-arrow:hover {
  color: var(--signal-bright);
  border-bottom-color: var(--signal-bright);
}

.hero .btn--primary {
  background: #f1ece2;
  border-color: #f1ece2;
  color: #171410;
}

.hero .btn--primary:hover {
  background: var(--signal-bright);
  border-color: var(--signal-bright);
  color: #171410;
}

.hero-meta {
  border-top-color: rgba(241, 236, 226, 0.55);
  border-bottom-color: rgba(241, 236, 226, 0.14);
}

.hero-meta__item + .hero-meta__item {
  border-left: 1px solid rgba(241, 236, 226, 0.12);
  padding-left: 0.9rem;
}

.hero-meta__label {
  color: #9f9687;
}

.hero-meta__value {
  color: #f1ece2;
}

.hero .quick-install {
  color: var(--ink);
  border-color: #f1ece2;
  box-shadow: 10px 10px 0 rgba(241, 236, 226, 0.14);
}

.hero .quick-install pre {
  background: #fbfaf6;
}

@media (min-width: 961px) {
  .page-hero h1 {
    font-size: clamp(3.3rem, 4.9vw, 5.2rem);
    font-stretch: 105%;
  }

  html[lang="zh-CN"] .page-hero h1 {
    font-size: clamp(3.3rem, 4.9vw, 5.2rem);
  }

  .section-title {
    font-size: clamp(2rem, 3.4vw, 3rem);
    font-stretch: 105%;
  }

  html[lang="zh-CN"] .section-title {
    font-size: clamp(2rem, 3.4vw, 3rem);
  }

  .section-intro {
    font-size: 1rem;
  }
}

@media (max-width: 640px) {
  .hero-title,
  html[lang="zh-CN"] .hero-title {
    font-size: clamp(2.9rem, 9.6vw, 3.4rem);
  }

  .hero .quick-install {
    box-shadow: 5px 5px 0 rgba(241, 236, 226, 0.14);
  }

  .hero-meta__item + .hero-meta__item {
    padding-left: 0.65rem;
  }
}

/* Cleanup: reduce editorial micro-labels and give the remaining labels room. */
.hero-grid {
  padding-bottom: clamp(4rem, 6.5vw, 6.5rem);
}

.page-jump {
  gap: 0.5rem 1.35rem;
  padding: 1rem 0;
  font-size: 0.76rem;
}

.page-jump__label {
  display: none;
}

.hero-meta,
.hero-topline,
.page-hero__top,
.page-hero__foot,
.hero-note,
.eyebrow,
.section-head__meta,
.section-label {
  display: none !important;
}

.section-head {
  margin-bottom: clamp(1.6rem, 3vw, 2.4rem);
}

/* Keep long-page navigation readable, not like metadata. */
.page-jump {
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  text-transform: none;
}

.page-jump a {
  padding-bottom: 0.15rem;
}

/* Utility labels stay functional, but no longer read as fine print. */
.code-top {
  font-size: 0.62rem;
}

.copy-btn {
  min-height: 32px;
  font-size: 0.62rem;
}

.quick-install__foot {
  font-size: 0.62rem;
  line-height: 1.55;
}

.footer-meta {
  font-size: 0.62rem;
}

.source-link {
  font-size: 0.64rem;
}

.footer-col h3 {
  font-size: 0.64rem;
}

.cap-summary__item > span {
  font-size: 0.74rem;
}

/* Remove the remaining navigational fine print. The global navigation and
   document headings carry orientation; no duplicate micro index. */
.page-jump,
.scenario-rail,
.source-link {
  display: none !important;
}

.scenario-layout {
  display: block;
}

/* Code boxes keep the copy action, not the tiny terminal labels. */
.code-top {
  justify-content: flex-end;
  min-height: 30px;
  padding: 0.15rem 0.5rem;
}

.code-top > span {
  display: none;
}

.code-top:not(:has(.copy-btn)) {
  display: none;
}

/* Artifact names are enough; drop the uppercase tags. */
.artifact-list li > span:last-child {
  display: none;
}

/* A larger closing frame: CTA, brand, and navigation in the ink footer. */
.site-footer {
  padding: 0 0 1.5rem;
}

.footer-cta {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) auto;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: end;
  padding: clamp(4rem, 7vw, 7rem) 0 clamp(3rem, 5vw, 5rem);
  border-bottom: 1px solid rgba(241, 236, 226, 0.16);
}

.footer-cta h2 {
  max-width: 15ch;
  margin: 0;
  color: #f1ece2;
  font-size: clamp(2.2rem, 4vw, 4rem);
  font-stretch: 105%;
  line-height: 1.03;
  letter-spacing: -0.035em;
}

.footer-cta__copy p {
  max-width: 44ch;
  margin: 1rem 0 0;
  color: #b9b0a2;
  font-size: 0.96rem;
  line-height: 1.65;
}

.footer-cta__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  align-items: center;
  gap: 1rem 1.5rem;
  padding-bottom: 0.2rem;
}

.footer-cta .btn {
  min-height: 48px;
  background: #f1ece2;
  border-color: #f1ece2;
  color: #171410;
}

.footer-cta .btn:hover {
  background: var(--signal-bright);
  border-color: var(--signal-bright);
  color: #171410;
}

.footer-cta .link-arrow {
  color: #f1ece2;
  border-bottom-color: rgba(241, 236, 226, 0.28);
}

.footer-cta .link-arrow:hover {
  color: var(--signal-bright);
  border-bottom-color: var(--signal-bright);
}

.site-footer .footer-grid {
  padding-top: clamp(2.5rem, 4vw, 3.5rem);
}

.site-footer .brand-mark {
  width: 23px;
  height: 23px;
}

.site-footer .brand-word {
  font-size: 1.35rem;
}

.site-footer .footer-desc {
  max-width: 46ch;
  margin-top: 0.8rem;
  font-size: 0.92rem;
  line-height: 1.7;
}

.site-footer .footer-col h3 {
  margin-bottom: 0.8rem;
  font-size: 0.7rem;
}

.site-footer .footer-col a {
  margin-bottom: 0.55rem;
  font-size: 0.94rem;
  line-height: 1.45;
}

.site-footer .footer-meta {
  margin-top: clamp(2.5rem, 5vw, 4rem);
  padding-top: 1rem;
  font-size: 0.64rem;
}

@media (max-width: 960px) {
  .footer-cta {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .footer-cta__actions {
    justify-content: flex-start;
  }
}

@media (max-width: 640px) {
  .footer-cta {
    padding-top: 3rem;
    padding-bottom: 2.5rem;
  }

  .footer-cta h2 {
    font-size: clamp(2rem, 10vw, 2.8rem);
  }

  .footer-cta__actions {
    gap: 0.9rem 1.2rem;
  }

  .footer-cta .btn {
    min-height: 44px;
  }
}

/* No decorative fine print: remove numbers and tags, lift functional labels
   above 12px, and let the remaining structure breathe. */
.device-step__num,
.scenario-item__num,
.step__num,
.flow-node__index,
.stack-row__num,
.scenario-no,
.scenario-tag,
.mini-ruler,
.status-row__mark,
.terminal-top {
  display: none !important;
}

.scenario-item {
  grid-template-columns: 1fr;
}

.step {
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
}

.scenario-head {
  grid-template-columns: minmax(0, 1fr);
}

.stack-row {
  grid-template-columns: minmax(12rem, 0.85fr) minmax(0, 1.15fr);
}

.status-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: baseline;
}

.device-step code,
.scenario-item code,
.tool-cap-row code,
.step__title code {
  display: none;
}

.lang-btn,
.copy-btn,
.quick-install__foot,
.footer-meta,
.footer-col h3,
.status-row__state,
.boundary-box__label,
.compare thead th,
.budget-stat span,
.terminal-stat span,
.cap-summary__item > span,
.tool-subhead {
  font-size: 0.75rem;
}

.tool-detail__name {
  font-size: 0.82rem;
}

.flow-node span:last-child,
.flow-node strong {
  font-size: 0.78rem;
}

.tool-cap-row__count {
  font-size: 0.95rem;
}

.artifact-list li > span:first-child {
  font-size: 0.8rem;
}

.report-figure figcaption {
  font-size: 0.75rem;
}

.code-box pre,
.quick-install pre {
  font-size: 0.8rem;
  line-height: 1.7;
}

.terminal-body {
  font-size: 0.8rem;
}

code {
  font-size: 0.88em;
}

pre code {
  font-size: inherit;
}

.tool-detail__desc code,
.section-intro code,
.callout code,
.device-note code,
.boundary-box__value code {
  font-size: 0.78rem;
}

@media (max-width: 960px) {
  .step,
  .stack-row,
  .status-row {
    grid-template-columns: 1fr;
  }

  .step__copy,
  .stack-row__copy,
  .status-row__state {
    grid-column: 1;
    text-align: left;
  }
}

/* Last fine-print pass: enforce a readable floor for every visible label. */
.skip-link {
  font-size: 0.75rem;
}

.site-footer .footer-col h3 {
  font-size: 0.78rem;
}

.site-footer .footer-meta {
  font-size: 0.76rem;
}

.cap-summary__item span {
  font-size: 0.78rem !important;
}

code {
  font-size: 0.78rem;
}

pre code {
  font-size: inherit;
}

.tool-table__row code {
  font-size: 0.75rem;
}

/* Readable utility floor (12.8px), including nested inline code. */
.lang-btn,
.copy-btn,
.quick-install__foot,
.footer-meta,
.footer-col h3,
.status-row__state,
.boundary-box__label,
.compare thead th,
.budget-stat span,
.terminal-stat span,
.cap-summary__item span,
.tool-subhead,
.skip-link {
  font-size: 0.8rem !important;
}

code,
.method-note code {
  font-size: 0.8rem;
}

pre code {
  font-size: inherit;
}

.tool-detail__name {
  font-size: 0.84rem;
}

.tool-cap-row__count {
  font-size: 1rem;
}

.artifact-list li > span:first-child,
.report-figure figcaption,
.flow-node span:last-child,
.flow-node strong {
  font-size: 0.8rem;
}

/* Prevent enlarged utility/code text from forcing grid tracks wider than the viewport. */
.hero-grid > *,
.quick-install,
.quick-install pre,
.quick-install code {
  min-width: 0;
  max-width: 100%;
}

.quick-install pre {
  overflow-x: auto;
}

.quick-install pre {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

/* Layout pass: horizontal scenario index, and reference-style section rails. */
@media (min-width: 1100px) {
  .scenario-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    border-bottom: 1px solid var(--line);
  }

  .scenario-item,
  .scenario-item:nth-child(odd),
  .scenario-item:nth-child(even) {
    padding: 1.4rem 1.25rem;
    border-right: 1px solid var(--line);
    border-bottom: 0;
  }

  .scenario-item:nth-child(4n) {
    padding-right: 0;
    border-right: 0;
  }

  .scenario-item:nth-child(4n + 1) {
    padding-left: 0;
  }

  .scenario-item h3 {
    font-size: 1.1rem;
  }

  .scenario-item p {
    font-size: 0.9rem;
  }

  /* Install steps: heading rail + content column. */
  .install-section {
    display: grid;
    grid-template-columns: minmax(190px, 0.28fr) minmax(0, 1fr);
    column-gap: clamp(2.5rem, 5vw, 5rem);
    align-items: start;
    padding-block: clamp(2.2rem, 3.5vw, 3.3rem);
  }

  .install-section > h2 {
    position: sticky;
    top: calc(var(--header-h) + 2rem);
    grid-column: 1;
    grid-row: 1;
    align-self: start;
    max-width: 9ch;
    margin: 0;
    font-size: clamp(1.55rem, 1.9vw, 2rem);
    line-height: 1.1;
  }

  .install-section > :not(h2) {
    grid-column: 2;
  }

  .install-section > h2 + * {
    margin-top: 0;
  }

  /* Tool reference: persistent section heading, rows on the right. */
  #session > .container,
  #trace > .container,
  #evidence > .container,
  body[data-page="tools"] #device > .container {
    display: grid;
    grid-template-columns: minmax(200px, 0.28fr) minmax(0, 1fr);
    column-gap: clamp(2.5rem, 5vw, 5rem);
    align-items: start;
  }

  #session .section-head,
  #trace .section-head,
  #evidence .section-head,
  body[data-page="tools"] #device .section-head {
    display: block;
    grid-column: 1;
    grid-row: 1;
    align-self: start;
    margin: 0;
    position: sticky;
    top: calc(var(--header-h) + 2rem);
  }

  #session .section-head .section-title,
  #trace .section-head .section-title,
  #evidence .section-head .section-title,
  body[data-page="tools"] #device .section-head .section-title {
    font-size: clamp(1.7rem, 2.2vw, 2.2rem);
    line-height: 1.08;
  }

  #session .section-head .section-intro,
  #trace .section-head .section-intro,
  #evidence .section-head .section-intro,
  body[data-page="tools"] #device .section-head .section-intro {
    max-width: none;
    margin-top: 0.9rem;
    font-size: 0.9rem;
    line-height: 1.6;
  }

  #session .tool-detail,
  #trace .tool-detail,
  #evidence .tool-detail,
  body[data-page="tools"] #device .tool-detail {
    grid-column: 2;
    grid-row: 1;
  }
}

/* The four capability rows get a strong numeric index. */
.tool-cap-row {
  grid-template-columns: 4rem minmax(0, 1fr) 1.2rem;
}

.tool-cap-row__count {
  padding-top: 0;
  font-size: 1.55rem;
  font-weight: 600;
  line-height: 1;
}

@media (max-width: 640px) {
  .tool-cap-row {
    grid-template-columns: 3.2rem minmax(0, 1fr) 1rem;
  }

  .tool-cap-row__count {
    font-size: 1.25rem;
  }
}

/* The tool reference uses a static heading rail so multi-block sections
   stack cleanly in the content column. */
@media (min-width: 1100px) {
  #session .section-head,
  #trace .section-head,
  #evidence .section-head,
  body[data-page="tools"] #device .section-head {
    position: static;
    grid-row: 1;
  }

  #session > .container > :not(.section-head),
  #trace > .container > :not(.section-head),
  #evidence > .container > :not(.section-head),
  body[data-page="tools"] #device > .container > :not(.section-head) {
    grid-column: 2;
  }

  #session .tool-detail,
  #trace .tool-detail,
  #evidence .tool-detail,
  body[data-page="tools"] #device .tool-detail {
    grid-row: auto;
  }

  .install-section > h2 {
    position: static;
  }
}

/* REA-style setup: prompt first, terminal as the secondary path. */
.quick-install__head {
  align-items: center;
  padding: 0.9rem 1rem;
}

.quick-install__head h2 {
  font-size: 1.1rem;
}

.quick-install__head .copy-btn {
  min-height: 32px;
}

.quick-install__prompt {
  padding: 1rem;
  border-bottom: 1px solid var(--line);
}

.quick-install__label {
  margin: 0 0 0.55rem;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 600;
}

.agent-prompt {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.86rem;
  line-height: 1.6;
}

.quick-install__manual {
  border-bottom: 1px solid var(--line);
}

.quick-install__manual summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.8rem 1rem;
  color: var(--ink);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}

.quick-install__manual summary::-webkit-details-marker {
  display: none;
}

.quick-install__manual summary::after {
  content: "+";
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 400;
}

.quick-install__manual[open] summary::after {
  content: "−";
}

.quick-install__manual-head {
  display: flex;
  justify-content: flex-end;
  padding: 0 1rem 0.45rem;
}

.quick-install__manual pre {
  border-top: 1px solid var(--line);
}

.quick-install__manual .copy-btn {
  min-height: 30px;
}

.quick-install__manual {
  border-bottom: 0;
}

.agent-prompt {
  overflow-wrap: anywhere;
}

/* Five tool families in the overview. */
@media (min-width: 961px) {
  .cap-summary {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .cap-summary__item:nth-child(5) {
    padding-left: 0;
    border-left: 0;
    border-top: 1px solid var(--line);
  }
}

/* Extend the reference rail to the unknown/handoff section. */
@media (min-width: 1100px) {
  #unknown > .container {
    display: grid;
    grid-template-columns: minmax(200px, 0.28fr) minmax(0, 1fr);
    column-gap: clamp(2.5rem, 5vw, 5rem);
    align-items: start;
  }

  #unknown .section-head {
    display: block;
    grid-column: 1;
    grid-row: 1;
    margin: 0;
  }

  #unknown .section-head .section-title {
    font-size: clamp(1.7rem, 2.2vw, 2.2rem);
    line-height: 1.08;
  }

  #unknown .section-head .section-intro {
    max-width: none;
    margin-top: 0.9rem;
    font-size: 0.9rem;
    line-height: 1.6;
  }

  #unknown .tool-detail {
    grid-column: 2;
    grid-row: 1;
  }
}

/* No logo mark: the product name is plain text. */
.brand {
  gap: 0;
}

.brand-text {
  color: var(--ink);
  font-size: 1rem;
  font-weight: 620;
  letter-spacing: -0.025em;
  line-height: 1;
}

.site-footer .brand-text {
  color: #f1ece2;
  font-size: 1.35rem;
  font-weight: 600;
}

/* Prompt as its own warm, framed block inside the install card. */
.quick-install__head {
  justify-content: flex-start;
  border-bottom: 0;
}

.quick-install__prompt {
  position: relative;
  margin: 0.9rem 0.9rem 1rem;
  padding: 0;
  border: 1px solid var(--line);
  border-left: 2px solid var(--signal);
  background: #f3efe6;
}

.quick-install__prompt-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  padding: 0.55rem 0.7rem 0.45rem 0.8rem;
  border-bottom: 1px solid var(--line);
}

.quick-install__label {
  margin: 0;
}

.quick-install__prompt .copy-btn {
  flex: 0 0 auto;
}

.agent-prompt {
  padding: 0.8rem;
  font-size: 0.88rem;
  line-height: 1.65;
}

.quick-install__manual {
  margin-top: 0.2rem;
}

/* Prompt pane: plain IDE surface, not a decorative card. */
.quick-install__prompt {
  border: 1px solid #343434;
  border-left: 1px solid #343434;
  background: #1e1e1e;
}

.quick-install__prompt-head {
  border-bottom-color: #343434;
  background: #252526;
}

.quick-install__label {
  color: #a8a8a8;
}

.agent-prompt {
  color: #d4d4d4;
}

.quick-install__prompt .copy-btn {
  border-color: #4a4a4a;
  background: #2d2d2d;
  color: #d4d4d4;
}

.quick-install__prompt .copy-btn:hover {
  border-color: #6b6b6b;
  background: #383838;
  color: #ffffff;
}

.quick-install__prompt .copy-btn.is-copied {
  border-color: var(--signal-bright);
  color: var(--signal-bright);
}

/* Brand lockup: product name with a quiet descriptor. */
.brand {
  flex-direction: column;
  align-items: flex-start;
  gap: 0.18rem;
  line-height: 1;
}

.brand-text {
  font-size: 1.35rem;
  font-weight: 650;
  letter-spacing: -0.04em;
  line-height: 1;
}

.brand-sub {
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 450;
  letter-spacing: 0.005em;
  line-height: 1.15;
  white-space: nowrap;
}

.site-footer .brand-text {
  font-size: 1.35rem;
}

@media (max-width: 720px) {
  .brand-sub {
    display: none;
  }

  .brand-text {
    font-size: 1.15rem;
  }
}

.brand-text {
  font-size: 1.5rem;
}

@media (max-width: 720px) {
  .brand-text {
    font-size: 1.2rem;
  }
}

/* Highlight shell commands inside the IDE prompt. */
.agent-prompt code {
  padding: 0.08em 0.32em;
  border: 1px solid rgba(230, 192, 123, 0.24);
  border-radius: 2px;
  background: rgba(230, 192, 123, 0.09);
  color: #e6c07b;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  line-height: 1.5;
  overflow-wrap: anywhere;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}

/* Section entry marks: a single measured red rule, no extra labels. */
.section-title::before,
.install-section > h2::before,
.scenario-head h2::before {
  content: "";
  display: block;
  width: 2rem;
  height: 2px;
  margin-bottom: 0.85rem;
  background: var(--signal);
}

.scenario-head h2::before {
  width: 1.5rem;
  margin-bottom: 0.7rem;
}

.scenario-item {
  transition: background 180ms var(--ease), box-shadow 180ms var(--ease), color 180ms var(--ease);
}

.scenario-item:hover {
  background: rgba(23, 22, 20, 0.025);
  box-shadow: inset 2px 0 0 var(--signal);
}

/* Keep section entry marks consistent across guide sections. */
.sticky-head h2::before {
  content: "";
  display: block;
  width: 2rem;
  height: 2px;
  margin-bottom: 0.85rem;
  background: var(--signal);
}

/* Mobile: code should reflow instead of disappearing past the container edge. */
@media (max-width: 720px) {
  .code-box pre,
  .quick-install__manual pre,
  .install-section pre {
    white-space: pre-wrap;
    overflow-wrap: anywhere;
  }

  /* The boundary table becomes a stack of labeled rows. */
  .compare {
    display: block;
    font-size: 1rem;
    border-top: 1px solid var(--ink);
  }

  .compare thead {
    display: none;
  }

  .compare tbody,
  .compare tr {
    display: block;
  }

  .compare tr {
    padding: 1rem 0;
    border-bottom: 1px solid var(--line);
  }

  .compare tbody th {
    display: block;
    width: auto;
    padding: 0 0 0.65rem;
    border: 0;
    font-size: 1rem;
    white-space: normal;
  }

  .compare td {
    display: grid;
    grid-template-columns: 5.2rem minmax(0, 1fr);
    gap: 0.7rem;
    width: auto;
    padding: 0.26rem 0;
    border: 0;
    font-size: 0.88rem;
    line-height: 1.55;
  }

  .compare td::before {
    color: var(--muted);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    line-height: 1.55;
  }

  html[lang="zh"] .compare td:nth-child(2)::before { content: "开始"; }
  html[lang="zh"] .compare td:nth-child(3)::before { content: "结束"; }
  html[lang="zh"] .compare td:nth-child(4)::before { content: "常见误判"; }

  html[lang="en"] .compare td:nth-child(2)::before { content: "Starts at"; }
  html[lang="en"] .compare td:nth-child(3)::before { content: "Ends at"; }
  html[lang="en"] .compare td:nth-child(4)::before { content: "Pitfall"; }

  .compare tr:last-child {
    border-bottom: 0;
  }
}

@media (max-width: 720px) {
  .compare tbody td:last-child {
    display: grid;
  }

  html[lang^="zh"] .compare td:nth-child(2)::before { content: "开始"; }
  html[lang^="zh"] .compare td:nth-child(3)::before { content: "结束"; }
  html[lang^="zh"] .compare td:nth-child(4)::before { content: "常见误判"; }

  html[lang="en"] .compare td:nth-child(2)::before { content: "Starts at"; }
  html[lang="en"] .compare td:nth-child(3)::before { content: "Ends at"; }
  html[lang="en"] .compare td:nth-child(4)::before { content: "Pitfall"; }
}

/* Header: taller, centered navigation, quieter material. */
:root {
  --header-h: 72px;
}

@media (max-width: 960px) {
  :root {
    --header-h: 64px;
  }
}

.site-header {
  background: rgba(247, 246, 242, 0.94);
  -webkit-backdrop-filter: saturate(120%) blur(14px);
  backdrop-filter: saturate(120%) blur(14px);
}

.header-inner {
  display: flex;
}

@media (min-width: 961px) {
  .header-inner {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    gap: 2rem;
  }

  .site-nav {
    justify-content: center;
    margin-left: 0;
    gap: 1.8rem;
  }

  .header-actions {
    justify-content: flex-end;
  }

  .nav-link {
    font-size: 0.84rem;
  }

  .lang-btn {
    min-width: 38px;
    min-height: 36px;
    font-size: 0.78rem;
  }
}

/* Visual refresh: continuous ink masthead, dark interior heroes, warm paper body. */
:root {
  --on-ink: #f2ede3;
  --on-ink-muted: #b6ad9f;
  --header-ink: #12100e;
}

.site-header {
  background: var(--header-ink);
  border-bottom-color: rgba(242, 237, 227, 0.15);
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}

.site-header.is-scrolled {
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.28);
}

.site-header .brand-text {
  color: var(--on-ink);
}

.site-header .brand-sub {
  color: rgba(242, 237, 227, 0.62);
}

.site-header .nav-link {
  color: rgba(242, 237, 227, 0.66);
}

.site-header .nav-link:hover,
.site-header .nav-link[aria-current="page"] {
  color: var(--on-ink);
}

.site-header .nav-link::after {
  background: rgba(242, 237, 227, 0.24);
}

.site-header .nav-link[aria-current="page"]::after {
  background: var(--signal-bright);
}

.site-header .lang-toggle {
  border-color: rgba(242, 237, 227, 0.3);
}

.site-header .lang-btn {
  color: rgba(242, 237, 227, 0.8);
}

.site-header .lang-btn + .lang-btn {
  border-left-color: rgba(242, 237, 227, 0.3);
}

.site-header .lang-btn[aria-pressed="true"] {
  background: var(--on-ink);
  color: var(--header-ink);
}

.site-header .lang-btn:hover:not([aria-pressed="true"]) {
  background: rgba(242, 237, 227, 0.12);
}

.site-header .nav-toggle {
  border-color: rgba(242, 237, 227, 0.3);
  color: var(--on-ink);
}

.scroll-progress {
  background: var(--signal-bright);
}

/* Dark interior heroes, same field as the home hero. */
.page-hero {
  background-color: var(--ink);
  background-image:
    linear-gradient(to right, rgba(242, 237, 227, 0.055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(242, 237, 227, 0.055) 1px, transparent 1px);
  background-size: 80px 80px;
  border-bottom-color: rgba(242, 237, 227, 0.15);
}

.page-hero h1 {
  color: var(--on-ink);
}

html[lang="zh-CN"] .page-hero h1 {
  color: var(--on-ink);
}

.page-hero__aside p {
  color: var(--on-ink-muted);
}

.page-hero__aside .mono {
  color: rgba(242, 237, 227, 0.58);
}

.hero::before {
  background-image:
    linear-gradient(to right, rgba(242, 237, 227, 0.055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(242, 237, 227, 0.055) 1px, transparent 1px);
}

@media (min-width: 961px) {
  .page-hero__aside {
    padding-left: clamp(1.5rem, 3vw, 2.5rem);
    border-left: 1px solid rgba(242, 237, 227, 0.18);
  }
}

@media (max-width: 960px) {
  .site-nav {
    background: var(--header-ink);
    border-bottom-color: rgba(242, 237, 227, 0.18);
  }

  .site-nav .nav-link {
    color: rgba(242, 237, 227, 0.72);
    border-bottom-color: rgba(242, 237, 227, 0.12);
  }

  .site-nav .nav-link[aria-current="page"] {
    color: var(--signal-bright);
  }
}

/* Slightly stronger supporting text on the ink surfaces. */
.site-header .brand-sub {
  color: rgba(242, 237, 227, 0.74);
}

.site-header .nav-link {
  color: rgba(242, 237, 227, 0.72);
}

.page-hero__aside p {
  color: rgba(242, 237, 227, 0.72);
}

@media (min-width: 961px) {
  .page-hero__aside {
    border-left-color: rgba(242, 237, 227, 0.22);
  }
}