@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500&family=Instrument+Serif:ital@0;1&display=swap");

:root {
  color-scheme: dark;
  --bg: #0a0a0a;
  --panel: #1a1a1a;
  --panel-strong: #1a1a1a;
  --panel-muted: #1a1a1a;
  --ink: #ffffff;
  --ink-soft: #888888;
  --muted: #888888;
  --line: #333333;
  --line-soft: #333333;
  --max: 1560px;
  --sans: "IBM Plex Sans", sans-serif;
  --serif: "Instrument Serif", Georgia, serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --timeline-year-col: 128px;
  --timeline-axis-col: 22px;
  --timeline-gap: 22px;
  --timeline-spine-x: 154px;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.65 var(--sans);
}

a {
  color: inherit;
  text-decoration: none;
}

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

button,
input,
textarea,
select {
  font: inherit;
}

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

.site-shell {
  min-height: 100vh;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(10, 10, 10, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.topbar-inner,
.page,
.footer-inner {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
}

.topbar-inner {
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 12px;
}

.brand-mark,
.status-pill,
.pill,
.button,
.ghost-button,
.copy-button,
.text-link {
  border: 1px solid var(--line);
}

.brand-mark,
.status-pill,
.pill,
.button,
.ghost-button,
.copy-button,
.text-link {
  background: var(--panel-strong);
}

.brand-mark,
.eyebrow,
.card-kicker,
.status-pill,
.meta-block h4,
.back-link,
.hero-caption-label,
.card-overlay-label,
.step-number,
.route-count,
.micro-note {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.brand-mark {
  padding: 0.44rem 0.62rem;
}

.brand-name {
  font-size: 0.92rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
  font-size: 0.84rem;
  color: var(--ink-soft);
}

.nav a:hover,
.back-link:hover {
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.status-pill {
  padding: 0.38rem 0.7rem;
}

.page {
  padding: 18px 0 88px;
}

.section {
  padding: 34px 0 40px;
  border-top: 1px solid var(--line-soft);
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.74fr);
  gap: 20px;
  align-items: end;
  margin-bottom: 18px;
}

.eyebrow,
.card-kicker,
.back-link,
.micro-note {
  margin: 0 0 10px;
  color: var(--muted);
}

.section-title,
.hero-title,
.card-title,
.detail-title,
.card-overlay-title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -0.04em;
}

.hero-title {
  font-size: clamp(3rem, 6.2vw, 6rem);
  line-height: 0.92;
  max-width: 11ch;
}

.section-title,
.detail-title {
  font-size: clamp(2rem, 3vw, 3.2rem);
  line-height: 0.96;
}

.card-title {
  font-size: 1.5rem;
  line-height: 1.05;
}

.bilingual-inline {
  display: inline;
}

.bilingual-stack {
  display: grid;
  gap: 0.14rem;
}

.bilingual-stack-zh,
.bilingual-stack-en {
  display: block;
}

.bilingual-stack-en {
  font-family: var(--sans);
  font-size: 0.72em;
  letter-spacing: 0.02em;
  color: var(--ink-soft);
}

.detail-bilingual-title .bilingual-stack-en,
.card-overlay-title .bilingual-stack-en {
  color: inherit;
  opacity: 0.82;
}

.section-summary,
.hero-intro,
.hero-support,
.hero-note,
.card-summary,
.detail-summary,
.meta-block p,
.reference-list,
.step-list p,
.empty-note,
figcaption,
code {
  color: var(--ink-soft);
}

.section-summary,
.hero-intro,
.hero-support,
.page-lead-aside p,
.detail-summary {
  font-size: 1rem;
}

.button,
.ghost-button,
.copy-button,
.text-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 14px;
  transition: background-color 120ms ease, color 120ms ease, transform 120ms ease;
}

.button {
  background: var(--ink);
  color: var(--panel-strong);
}

.button:hover,
.ghost-button:hover,
.copy-button:hover,
.text-link:hover,
.pill:hover {
  background: var(--ink);
  color: var(--panel-strong);
  text-decoration: none;
  transform: translateY(-1px);
}

.hero-actions,
.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 10px;
  font-size: 0.74rem;
}

.pill.is-static {
  cursor: default;
}

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

.hero-stage {
  padding: 10px 0 34px;
}

.hero-stage-grid,
.page-lead,
.detail-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(340px, 0.9fr);
  gap: 18px;
}

.page-lead-copy {
  padding-right: 18px;
}

.hero-support {
  max-width: 44rem;
}

.hero-aside,
.page-lead-aside,
.detail-copy,
.route-card,
.usecase-card,
.movement-card,
.family-card,
.detail-card {
  overflow: hidden;
}

.hero-aside,
.page-lead-aside,
.detail-copy {
  padding: 18px;
}

.hero-aside-dark {
  display: grid;
  align-content: start;
  gap: 14px;
  background: var(--ink);
  color: var(--panel-strong);
}

.hero-aside-dark .eyebrow,
.hero-aside-dark .hero-intro,
.hero-aside-dark .hero-support,
.hero-aside-dark .hero-note,
.hero-aside-dark .step-number,
.hero-aside-dark .hero-step-line p {
  color: rgba(255, 255, 255, 0.84);
}

.hero-aside-dark .ghost-button {
  background: transparent;
  color: var(--panel-strong);
  border-color: rgba(255, 255, 255, 0.24);
}

.hero-aside-dark .button {
  background: var(--panel-strong);
  color: var(--ink);
}

.hero-mini-steps {
  display: grid;
  gap: 10px;
  margin-top: 8px;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
}

.hero-step-line {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: start;
}

.hero-step-line p {
  margin: 0;
  font-size: 0.95rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  grid-auto-rows: clamp(110px, 8vw, 150px);
  grid-auto-flow: dense;
  gap: 14px;
}

.hero-tile {
  position: relative;
  display: block;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel-muted);
}

.hero-tile--hero {
  grid-column: span 7;
  grid-row: span 4;
}

.hero-tile--tall {
  grid-column: span 5;
  grid-row: span 2;
}

.hero-tile--wide {
  grid-column: span 6;
  grid-row: span 1;
}

.hero-tile--standard {
  grid-column: span 3;
  grid-row: span 1;
}

.image-frame,
.image-figure {
  margin: 0;
  height: 100%;
  background: var(--panel-muted);
}

.image-frame {
  overflow: hidden;
}

.image-frame img,
.detail-media img,
.gallery-grid img,
.movement-strip img,
.card-media img {
  height: 100%;
  object-fit: cover;
  transition: transform 220ms ease;
}

.hero-tile:hover img,
.card-media:hover img,
.image-figure:hover img {
  transform: scale(1.02);
}

.hero-tile .image-frame,
.hero-tile img,
.detail-media,
.detail-media .image-frame,
.detail-media img {
  height: 100%;
}

.hero-caption,
.card-overlay {
  position: absolute;
  inset: auto 0 0;
  display: grid;
  gap: 2px;
  padding: 14px;
  background: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.84) 100%);
  color: var(--panel-strong);
}

.hero-caption-meta {
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.84rem;
}

.card-overlay-title {
  font-size: 1.18rem;
  line-height: 1.05;
}

.card-overlay-title .bilingual-stack {
  gap: 0.1rem;
}

.route-grid,
.family-grid,
.movement-grid,
.usecase-grid,
.relation-grid,
.detail-section-grid,
.gallery-grid {
  display: grid;
  gap: 16px;
}

.route-grid,
.movement-grid,
.usecase-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.family-grid,
.relation-grid,
.detail-section-grid,
.gallery-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.resource-group + .resource-group {
  margin-top: 34px;
}

.resource-card-links {
  padding-top: 4px;
}

.card-body {
  display: grid;
  gap: 12px;
  padding: 18px;
}

.relation-card {
  border-left: 3px solid var(--ink);
  background: var(--panel-strong);
}

.relation-card .card-body {
  gap: 14px;
}

.relation-card .card-title {
  max-width: 14ch;
}

.relation-card .text-link {
  width: fit-content;
}

.card-summary,
.meta-block p,
.page-lead-aside p,
.reference-list {
  margin: 0;
}

.route-card-top,
.movement-meta {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}

.route-count {
  color: var(--muted);
}

.home-overview {
  border-top: 0;
  padding-top: 12px;
}

.home-overview-grid {
  display: grid;
  grid-template-columns: minmax(340px, 0.84fr) minmax(0, 1.16fr);
  gap: 18px;
  align-items: start;
}

.home-overview-copy {
  display: grid;
  gap: 18px;
  padding: 22px;
  border: 1px solid var(--line);
  background: var(--panel-strong);
}

.home-overview-title {
  max-width: 9ch;
}

.home-overview-title .bilingual-stack-en {
  font-size: 0.24em;
  letter-spacing: 0;
}

.home-overview-intro,
.home-overview-support {
  max-width: 42rem;
}

.home-overview-map {
  overflow: hidden;
  background: var(--panel-strong);
}

.home-overview-map .card-body {
  padding-bottom: 14px;
}

.home-overview-map .atlas-scroller {
  padding-bottom: 0;
}

.home-overview-map .field-atlas {
  min-width: 840px;
  min-height: 470px;
  padding: 34px 36px;
  border: 0;
  border-top: 1px solid var(--line);
}

.route-grid--overview {
  grid-template-columns: 1fr;
  gap: 10px;
}

.route-card--compact .card-body {
  gap: 10px;
  padding: 16px 18px;
}

.route-card--compact .card-title {
  font-size: 1.3rem;
  line-height: 1.08;
}

.route-card--compact .text-link {
  width: fit-content;
}

.family-card-media,
.movement-card-media,
.usecase-media {
  position: relative;
  display: block;
  min-height: 320px;
  border-bottom: 1px solid var(--line);
}

.movement-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  min-height: 220px;
  border-bottom: 1px solid var(--line);
}

.meta-block {
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
}

.meta-block h4 {
  margin: 0 0 6px;
  color: var(--muted);
}

.bullet-list,
.reference-list {
  margin: 0;
  padding-left: 18px;
}

.reference-link {
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.page-lead {
  padding: 12px 0 30px;
}

.page-lead-aside {
  display: grid;
  align-content: start;
  gap: 16px;
}

.selector-shell {
  padding-top: 18px;
}

.selector-layout {
  display: grid;
  grid-template-columns: minmax(300px, 0.72fr) minmax(0, 1.28fr);
  gap: 18px;
  align-items: start;
}

.selector-panel,
.selector-reference-card,
.selector-summary,
.selector-prompt-panel {
  overflow: hidden;
}

.selector-panel {
  position: sticky;
  top: 88px;
  display: grid;
  gap: 18px;
  padding: 18px;
}

.selector-panel-copy {
  display: grid;
  gap: 10px;
}

.selector-panel-copy .section-title {
  font-size: clamp(1.7rem, 2.6vw, 2.4rem);
}

.selector-form {
  display: grid;
  gap: 0;
}

.selector-field {
  display: grid;
  gap: 8px;
  padding: 14px 0;
  border-top: 1px solid var(--line-soft);
}

.selector-field:first-child {
  padding-top: 0;
  border-top: 0;
}

.selector-label,
.selector-field-note {
  display: block;
}

.selector-label {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.selector-select {
  width: 100%;
  min-height: 46px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 0;
  background: var(--panel-strong);
  color: var(--ink);
  appearance: none;
}

.selector-select:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}

.selector-field-note {
  color: var(--ink-soft);
  font-size: 0.84rem;
  line-height: 1.45;
}

.selector-results {
  display: grid;
  gap: 16px;
}

.selector-summary .card-body,
.selector-prompt-panel .card-body {
  gap: 16px;
}

.selector-summary-grid,
.selector-meta-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.selector-choice-grid,
.selector-reference-grid {
  display: grid;
  gap: 16px;
}

.selector-choice-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.selector-choice-card .card-title {
  max-width: 13ch;
}

.selector-choice-card .card-summary {
  min-height: 4.8em;
}

.selector-meta-grid {
  align-items: start;
}

.selector-alternative-stack {
  display: grid;
  gap: 14px;
}

.selector-reference-section {
  display: grid;
  gap: 18px;
}

.selector-reference-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.selector-reference-media {
  min-height: 280px;
  border-bottom: 1px solid var(--line);
}

.selector-reference-card .card-body {
  padding-top: 16px;
}

.detail-hero {
  padding: 12px 0 22px;
}

.detail-copy {
  display: grid;
  align-content: start;
  gap: 12px;
}

.detail-meta-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.image-figure {
  border: 1px solid var(--line);
  background: var(--panel);
}

.image-figure figcaption {
  padding: 10px 12px;
  border-top: 1px solid var(--line-soft);
  font-size: 0.84rem;
}

.prompt-card code,
.detail-card code {
  display: block;
  white-space: pre-wrap;
  font-size: 0.84rem;
  line-height: 1.7;
}

.pill-text {
  white-space: normal;
}

.back-link {
  display: inline-flex;
}

.image-placeholder {
  display: grid;
  place-items: center;
  min-height: 220px;
  padding: 18px;
  text-align: center;
  color: var(--muted);
  border: 1px dashed var(--line-soft);
  background: var(--panel-muted);
}

.empty-note {
  margin: 0;
}

.footer {
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 24px 0 30px;
  color: var(--muted);
  font-size: 0.84rem;
}

.footer-inner p {
  margin: 0;
}

.atlas-scroller {
  overflow-x: auto;
  padding-bottom: 6px;
}

.atlas-scroller--compact {
  overflow: visible;
  padding-bottom: 0;
}

.route-card--compact .card-summary {
  font-size: 0.94rem;
}

.field-atlas--compact {
  min-width: 100%;
  min-height: 460px;
  padding: 34px 36px;
}

.field-atlas--compact .field-point-label {
  min-width: 108px;
}

.timeline-feature {
  padding-top: 34px;
}

.home-page .timeline-feature--hero {
  border-top: 0;
  padding-top: 12px;
}

.timeline-feature-head {
  display: grid;
  gap: 12px;
  margin-bottom: 18px;
  max-width: 58rem;
}

.timeline-feature-head .eyebrow,
.timeline-feature-intro {
  margin: 0;
}

.timeline-feature-title {
  max-width: 14ch;
}

.timeline-feature-title .timeline-feature-title-stack {
  gap: 0.2rem;
}

.timeline-feature-title .timeline-feature-title-stack .bilingual-stack-zh {
  font-size: 1em;
  line-height: 0.94;
}

.timeline-feature-title .timeline-feature-title-stack .bilingual-stack-en {
  font-size: 0.34em;
  line-height: 1.02;
  letter-spacing: 0;
}

.timeline-feature-intro {
  max-width: 38rem;
  color: var(--ink-soft);
  font-size: 1rem;
}

.timeline-nav {
  display: grid;
  gap: 16px;
  margin-bottom: 22px;
  padding: 18px 20px 20px;
  background: var(--panel-strong);
}

.timeline-nav-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
}

.timeline-nav-title {
  max-width: 20ch;
  font-size: 1.42rem;
}

.timeline-nav-scale {
  display: flex;
  gap: 16px;
  margin: 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.timeline-nav-scroll {
  overflow-x: auto;
  padding-bottom: 6px;
}

.timeline-nav-track {
  position: relative;
  min-width: 1080px;
  height: 108px;
}

.timeline-nav-track::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 20px;
  height: 1px;
  background: var(--line);
}

.timeline-nav-stop {
  position: absolute;
  top: 0;
  transform: translateX(-50%);
  display: grid;
  justify-items: center;
  gap: 6px;
  min-width: 92px;
}

.timeline-nav-stop-dot {
  width: 10px;
  height: 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel-strong);
}

.timeline-nav-stop:hover .timeline-nav-stop-dot,
.timeline-nav-stop:focus-visible .timeline-nav-stop-dot {
  background: var(--ink);
}

.timeline-nav-stop-year {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.timeline-nav-stop-label {
  max-width: 12ch;
  text-align: center;
}

.timeline-nav-stop-stack {
  display: grid;
  gap: 0.08rem;
}

.timeline-nav-stop-stack .bilingual-stack-zh {
  font-size: 0.82rem;
  line-height: 1.04;
}

.timeline-nav-stop-stack .bilingual-stack-en {
  font-size: 0.6rem;
  line-height: 1.08;
}

.timeline-stream {
  position: relative;
  display: grid;
  gap: 0;
}

.timeline-stream::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
  background: linear-gradient(180deg, rgba(17, 17, 17, 0.18) 0%, rgba(17, 17, 17, 0.08) 100%);
  transform: translateX(-50%);
}

.timeline-stream-item {
  position: relative;
  z-index: 1;
  padding: 10px 0 24px;
  scroll-margin-top: 92px;
}

.timeline-stream-summary,
.timeline-stream-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 84px minmax(0, 1fr);
  gap: 18px;
}

.timeline-stream-item--right .timeline-stream-summary {
  grid-template-areas: "years marker preview";
}

.timeline-stream-item--left .timeline-stream-summary {
  grid-template-areas: "preview marker years";
}

.timeline-stream-item--right .timeline-stream-body {
  grid-template-areas: "spacer track body";
}

.timeline-stream-item--left .timeline-stream-body {
  grid-template-areas: "body track spacer";
}

.timeline-stream-summary {
  padding: 0;
  cursor: pointer;
  list-style: none;
  align-items: start;
}

.timeline-stream-summary::-webkit-details-marker {
  display: none;
}

.timeline-stream-summary:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 4px;
}

.timeline-stream-years {
  grid-area: years;
  display: grid;
  align-content: start;
  gap: 8px;
  max-width: 170px;
  padding-top: 14px;
}

.timeline-stream-item--right .timeline-stream-years {
  justify-self: end;
  text-align: right;
}

.timeline-stream-item--left .timeline-stream-years {
  justify-self: start;
  text-align: left;
}

.timeline-stream-year-start,
.timeline-stream-year-end {
  display: block;
}

.timeline-stream-year-start {
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(4.4rem, 6vw, 7rem);
  line-height: 0.72;
  letter-spacing: -0.08em;
}

.timeline-stream-year-end {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.timeline-stream-marker,
.timeline-stream-body-track {
  grid-area: marker;
  position: relative;
  display: grid;
  justify-items: center;
}

.timeline-stream-body-track {
  grid-area: track;
}

.timeline-stream-marker::before,
.timeline-stream-body-track::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: linear-gradient(180deg, rgba(17, 17, 17, 0.22) 0%, rgba(17, 17, 17, 0.08) 100%);
  transform: translateX(-50%);
}

.timeline-stream-dot {
  position: relative;
  z-index: 1;
  width: 16px;
  height: 16px;
  margin-top: 20px;
  border: 2px solid var(--line);
  border-radius: 999px;
  background: var(--bg);
}

.timeline-stream-item[open] .timeline-stream-dot {
  background: var(--ink);
}

.timeline-stream-preview {
  grid-area: preview;
  display: grid;
  grid-template-columns: minmax(260px, 1fr) minmax(220px, 0.78fr);
  gap: 18px;
  min-width: 0;
  align-items: start;
  padding: 16px;
  border: 1px solid var(--line);
  background: var(--panel);
}

.timeline-stream-item[open] .timeline-stream-preview {
  background: var(--panel-strong);
  box-shadow: inset 4px 0 0 var(--ink);
}

.timeline-stream-preview-media,
.timeline-stream-preview-copy,
.timeline-stream-body-main {
  min-width: 0;
}

.timeline-stream-figure img {
  height: clamp(250px, 24vw, 340px);
  object-fit: cover;
}

.timeline-stream-item[open] .timeline-stream-figure img {
  height: clamp(360px, 38vw, 540px);
}

.timeline-stream-visual-note {
  display: grid;
  gap: 4px;
  margin: 10px 0 0;
  color: var(--ink-soft);
  font-size: 0.9rem;
  line-height: 1.45;
}

.timeline-stream-preview-copy {
  display: grid;
  align-content: start;
  gap: 14px;
  padding-top: 4px;
}

.timeline-stream-title {
  max-width: 10ch;
}

.timeline-stream-keyword {
  margin: 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.timeline-stream-preview-copy .eyebrow,
.timeline-stream-hook,
.timeline-stream-common,
.timeline-stream-keyword {
  margin: 0;
}

.timeline-stream-preview-families {
  padding-top: 0;
  border-top: 0;
}

.timeline-stream-hook {
  max-width: 20rem;
  color: var(--ink);
  font-size: 1.08rem;
  line-height: 1.42;
}

.timeline-stream-common {
  max-width: none;
  font-size: 0.98rem;
  color: var(--ink-soft);
}

.timeline-stream-body-intro {
  max-width: 34rem;
}

.timeline-stream-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  width: fit-content;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.timeline-stream-toggle::before {
  content: "+";
  color: var(--ink);
}

.timeline-stream-toggle-open {
  display: none;
}

.timeline-stream-item[open] .timeline-stream-toggle::before {
  content: "-";
}

.timeline-stream-item[open] .timeline-stream-toggle-closed {
  display: none;
}

.timeline-stream-item[open] .timeline-stream-toggle-open {
  display: inline;
}

.timeline-stream-body {
  padding: 12px 0 0;
}

.timeline-stream-body-spacer {
  grid-area: spacer;
  display: block;
}

.timeline-stream-body-main {
  grid-area: body;
  display: grid;
  gap: 16px;
  padding: 18px;
  border: 1px solid var(--line-soft);
  border-top: 0;
  background: var(--panel-strong);
}

.timeline-stream-meta-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.timeline-stream-meta-grid .meta-block {
  padding-top: 0;
  border-top: 0;
}

.timeline-preview-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.timeline-strip-figure img {
  height: 168px;
  object-fit: cover;
}

.timeline-preview-copy {
  display: grid;
  align-content: start;
  gap: 14px;
}

.timeline-preview-copy .eyebrow,
.timeline-preview-hook,
.timeline-preview-common,
.timeline-preview-copy .micro-note {
  margin: 0;
}

.timeline-preview-hook {
  max-width: 28rem;
  color: var(--ink);
  font-size: 1.12rem;
  line-height: 1.5;
}

.timeline-preview-common {
  max-width: 28rem;
}

.timeline-details {
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
}

.timeline-details summary {
  cursor: pointer;
  list-style: none;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

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

.timeline-details summary::after {
  float: right;
  color: var(--ink);
  content: "+";
}

.timeline-details[open] summary::after {
  content: "-";
}

.timeline-details-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  padding-top: 12px;
}

.timeline-details-grid .meta-block {
  padding-top: 0;
  border-top: 0;
}

.field-atlas {
  position: relative;
  min-width: 1040px;
  min-height: 560px;
  padding: 40px 44px;
}

.field-atlas-shell {
  display: grid;
  gap: 18px;
}

.field-axis {
  position: absolute;
  background: var(--line);
}

.field-axis--x {
  left: 44px;
  right: 44px;
  top: 50%;
  height: 1px;
}

.field-axis--y {
  top: 44px;
  bottom: 44px;
  left: 50%;
  width: 1px;
}

.field-axis-label {
  position: absolute;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.field-axis-label--left {
  left: 44px;
  bottom: 18px;
}

.field-axis-label--right {
  right: 44px;
  bottom: 18px;
  text-align: right;
}

.field-axis-label--top {
  right: 16px;
  top: 48px;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
}

.field-axis-label--bottom {
  left: 16px;
  bottom: 48px;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
}

.field-point {
  position: absolute;
  transform: translate(-50%, -50%);
  color: inherit;
  z-index: 1;
  transition: opacity 160ms ease;
}

.field-atlas:hover .field-point:not(.is-active),
.field-atlas:focus-within .field-point:not(.is-active) {
  opacity: 0.34;
}

.field-point-dot {
  display: block;
  width: 12px;
  height: 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel-strong);
  transition: background 160ms ease, transform 160ms ease, border-color 160ms ease;
}

.field-point:hover .field-point-dot,
.field-point.is-active .field-point-dot,
.field-point:focus-visible .field-point-dot {
  background: var(--ink);
  border-color: var(--ink);
  transform: scale(1.2);
}

.field-point.is-active {
  z-index: 3;
}

.field-point-label {
  position: absolute;
  top: 16px;
  left: 10px;
  min-width: 84px;
  opacity: 0.72;
  transition: opacity 160ms ease, transform 160ms ease;
  transform: translateY(0);
  pointer-events: none;
}

.field-point:hover .field-point-label,
.field-point.is-active .field-point-label,
.field-point:focus-visible .field-point-label {
  opacity: 1;
  transform: translateY(-2px);
}

.field-label-stack .bilingual-stack-zh {
  font-size: 0.72rem;
  line-height: 1.05;
}

.field-label-stack .bilingual-stack-en {
  display: none;
}

.field-preview-panel {
  display: grid;
  grid-template-columns: minmax(220px, 0.92fr) minmax(0, 1.08fr);
  gap: 18px;
  align-items: start;
}

.field-preview-media {
  display: block;
}

.field-preview-media .image-frame img,
.field-preview-media .image-placeholder {
  min-height: 188px;
}

.field-preview-body {
  display: grid;
  gap: 10px;
}

.field-preview-reference,
.field-preview-fit {
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
}

.field-preview-reference {
  color: var(--muted);
}

.home-hero {
  border-top: 0;
  padding-top: clamp(36px, 6vh, 84px);
  padding-bottom: clamp(20px, 4vh, 48px);
  min-height: auto;
}

.home-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(280px, 0.72fr);
  gap: clamp(28px, 4vw, 72px);
  align-items: end;
  max-width: 74rem;
  margin: 0 auto;
}

.home-hero-inner {
  display: grid;
  gap: 18px;
  max-width: 44rem;
}

.home-hero-title {
  display: grid;
  gap: 10px;
  max-width: 11ch;
}

.home-hero-title-line {
  display: block;
  font-size: clamp(4rem, 7.2vw, 6.9rem);
  line-height: 0.84;
}

.home-hero-title-en {
  max-width: 20ch;
  color: var(--ink-soft);
  font-family: var(--sans);
  font-size: clamp(1rem, 1.35vw, 1.18rem);
  line-height: 1.16;
  letter-spacing: 0.01em;
  white-space: normal;
}

.home-hero-stats {
  margin: 0;
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 0.72rem;
  line-height: 1.8;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.home-hero-guide {
  display: grid;
  gap: 18px;
  min-height: 100%;
  padding: 20px 22px;
}

.home-hero-guide-list {
  display: grid;
  gap: 0;
}

.home-hero-guide-row {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr) auto;
  gap: 14px;
  align-items: start;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.home-hero-guide-row:first-child {
  padding-top: 0;
  border-top: 0;
}

.home-hero-guide-count,
.home-hero-guide-rank,
.timeline-nav-back {
  font-family: var(--mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.home-hero-guide-count {
  margin: 0;
  color: #555555;
  font-family: var(--serif);
  font-size: 2rem;
  line-height: 0.88;
  letter-spacing: 0;
  text-transform: none;
}

.home-hero-guide-row.is-primary .home-hero-guide-count,
.home-hero-guide-row.is-primary .home-hero-guide-rank {
  color: var(--ink);
}

.home-hero-guide-copy {
  display: grid;
  gap: 4px;
}

.home-hero-guide-title,
.home-hero-guide-note {
  margin: 0;
}

.home-hero-guide-title {
  font-size: 1rem;
  line-height: 1.2;
}

.home-hero-guide-note {
  color: var(--ink-soft);
  font-size: 0.84rem;
  line-height: 1.35;
}

.home-hero-guide-rank {
  display: inline-flex;
  align-items: center;
  align-self: start;
  min-height: 28px;
  padding: 0 8px;
  border: 1px solid #555555;
  font-size: 0.62rem;
}

.home-hero-range {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: center;
  padding-top: 6px;
}

.home-hero-range-start,
.home-hero-range-end {
  font-family: var(--serif);
  font-size: clamp(2.1rem, 3.2vw, 3.4rem);
  line-height: 0.88;
}

.home-hero-range-rule {
  height: 1px;
  background: var(--line);
}

.home-hero-jump {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
}

.home-hero-jump:hover,
.home-hero-jump:focus-visible {
  color: var(--ink);
  text-decoration: none;
}

.hero-route-buttons {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, max-content));
  gap: 12px;
  justify-content: start;
}

.hero-route-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 16px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink-soft);
  transition: background-color 180ms ease, color 180ms ease, border-color 180ms ease;
}

.hero-route-button:hover,
.hero-route-button:focus-visible {
  background: #202020;
  color: var(--ink);
  text-decoration: none;
}

.hero-route-button--primary {
  background: #202020;
  color: var(--ink);
  border-color: #666666;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.hero-route-button--primary:hover,
.hero-route-button--primary:focus-visible {
  background: #222222;
  color: var(--ink);
}

.timeline-feature {
  padding-top: 12px;
}

.timeline-feature-head {
  display: grid;
  grid-template-columns: minmax(150px, 0.28fr) minmax(0, 1fr);
  gap: 16px;
  align-items: end;
  margin-bottom: 16px;
}

.timeline-feature-period {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 10px;
  align-items: center;
}

.timeline-feature-period-start,
.timeline-feature-period-end {
  font-family: var(--serif);
  font-size: clamp(2.2rem, 4vw, 3.8rem);
  line-height: 0.82;
}

.timeline-feature-period-divider {
  height: 1px;
  background: var(--line);
}

.timeline-feature-head-main {
  display: grid;
  gap: 10px;
  max-width: 32rem;
}

.timeline-feature-title {
  max-width: none;
}

.timeline-feature-intro {
  max-width: 44rem;
  font-size: 0.96rem;
}

.timeline-nav {
  display: grid;
  gap: 10px;
  margin-bottom: 20px;
  padding: 12px 14px 14px;
  border: 1px solid var(--line);
  background: var(--panel);
}

.timeline-nav-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
}

.timeline-nav-scale {
  display: flex;
  gap: 18px;
  margin: 0;
  color: #555555;
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.timeline-nav-back {
  color: var(--ink-soft);
  font-size: 0.68rem;
}

.timeline-nav-back:hover,
.timeline-nav-back:focus-visible {
  color: var(--ink);
}

.timeline-nav-scroll {
  overflow-x: auto;
  padding-bottom: 8px;
}

.timeline-nav-track {
  position: relative;
  min-width: 1240px;
  height: 34px;
}

.timeline-nav-track::before {
  content: "";
  position: absolute;
  inset: 8px 0 auto;
  height: 1px;
  background: var(--line);
}

.timeline-nav-stop {
  position: absolute;
  top: 0;
  transform: translateX(-50%);
  display: grid;
  justify-items: center;
  gap: 6px;
  min-width: 40px;
}

.timeline-nav-stop-dot {
  width: 8px;
  height: 8px;
  border: 1px solid #666666;
  border-radius: 999px;
  background: var(--bg);
}

.timeline-nav-stop-year {
  color: #555555;
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.timeline-stream {
  position: relative;
  display: grid;
  gap: 14px;
  width: min(88rem, 100%);
  margin: 0 auto;
}

.timeline-stream::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: var(--timeline-spine-x);
  width: 1px;
  background: var(--line);
}

.js-enhanced .timeline-stream::before {
  transform: scaleY(0);
  transform-origin: top;
  animation: timeline-grow 300ms ease-out forwards;
}

.timeline-node {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: var(--timeline-year-col) var(--timeline-axis-col) minmax(0, 1fr);
  gap: var(--timeline-gap);
  align-items: start;
  scroll-margin-top: 96px;
}

.js-enhanced .timeline-node {
  opacity: 0;
  transform: translateX(-12px);
  transition: opacity 260ms ease, transform 260ms ease;
  transition-delay: var(--stagger, 0ms);
}

.js-enhanced .timeline-node.is-visible {
  opacity: 1;
  transform: translateX(0);
}

.timeline-node-year {
  display: grid;
  align-content: start;
  gap: 6px;
  padding-top: 14px;
  text-align: right;
}

.timeline-node-year-number,
.timeline-node-title-year {
  color: #555555;
  font-family: var(--mono);
  font-size: 1.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  line-height: 0.9;
}

.timeline-node-year-range {
  color: #555555;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.timeline-node-axis {
  position: relative;
  display: grid;
  justify-items: center;
  min-height: 124px;
}

.timeline-node-dot {
  position: relative;
  z-index: 1;
  width: 10px;
  height: 10px;
  margin-top: 22px;
  border: 1px solid #666666;
  border-radius: 999px;
  background: var(--bg);
}

.timeline-node-card {
  display: grid;
  grid-template-columns: minmax(220px, 300px) minmax(0, 1fr);
  gap: 24px;
  align-items: start;
  width: 100%;
  max-width: none;
  padding: 22px 24px;
  border: 1px solid var(--line);
  background: var(--panel);
  transition: border-color 200ms ease, opacity 200ms ease;
}

.timeline-node-card:hover,
.timeline-node-card:focus-visible {
  text-decoration: none;
  border-color: #555555;
}

.timeline-node-media {
  display: block;
  min-width: 0;
}

.timeline-node-image-wrap,
.timeline-node-placeholder {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--panel);
}

.timeline-node-placeholder {
  border: 1px solid var(--line);
  background: var(--panel);
}

.timeline-node-image,
.timeline-node-image img {
  height: 100%;
}

.timeline-node-image::after,
.timeline-node-placeholder::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.38);
  transition: background-color 200ms ease;
  pointer-events: none;
}

.timeline-node-copy {
  display: grid;
  align-content: start;
  gap: 12px;
  min-height: 0;
  overflow: visible;
}

.timeline-node-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.timeline-node-titleline,
.timeline-node-summary,
.timeline-node-line {
  margin: 0;
}

.timeline-node-titleline {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  align-items: baseline;
  color: var(--ink);
  flex: 1;
}

.timeline-node-title-zh {
  font-size: 1.3rem;
  line-height: 1.14;
}

.timeline-node-title-en {
  color: var(--ink-soft);
  font-size: 0.94rem;
  line-height: 1.2;
}

.timeline-node-open {
  color: var(--ink-soft);
  white-space: nowrap;
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.timeline-node-summary {
  color: var(--ink);
  font-size: 1rem;
  line-height: 1.68;
}

.timeline-node-line {
  display: grid;
  gap: 4px;
  color: var(--ink-soft);
  font-size: 0.92rem;
  line-height: 1.62;
}

.timeline-node-label {
  display: block;
  min-width: 0;
  margin-right: 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.timeline-node-detail {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
  line-height: 1.68;
}

.timeline-node-line--stacked {
  gap: 6px;
}

.timeline-node-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  padding-top: 6px;
}

.timeline-node-tag {
  color: var(--ink-soft);
  font-size: 0.78rem;
  line-height: 1.3;
}

.timeline-node-detail {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.92rem;
  line-height: 1.6;
}

.timeline-node-line--stacked {
  display: grid;
  gap: 6px;
}

.timeline-node-line--stacked .timeline-node-label {
  margin-right: 0;
}

.timeline-node-signals {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.timeline-node-signal {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 10px;
  border: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.76rem;
  line-height: 1.2;
  background: rgba(255, 255, 255, 0.02);
}

.timeline-stream--expanded .timeline-node-year {
  padding-top: 10px;
}

.timeline-stream--expanded .timeline-node-year-number {
  font-size: clamp(1.35rem, 1.9vw, 1.85rem);
  letter-spacing: 0.08em;
}

.timeline-stream--expanded .timeline-node-year-range {
  font-size: 0.68rem;
}

.timeline-stream--expanded .timeline-node-card {
  max-width: none;
  padding: 20px 22px;
}

.timeline-stream--expanded .timeline-node-copy {
  gap: 12px;
}

.timeline-stream--expanded .timeline-node-summary {
  font-size: 1rem;
}

.home-page .timeline-feature {
  max-width: 78rem;
  margin: 0 auto;
  padding-top: 0;
}

.home-page .timeline-feature-head {
  margin-bottom: 14px;
}

.home-page .timeline-feature-title {
  font-size: clamp(1.7rem, 2.4vw, 2.4rem);
  line-height: 0.98;
}

@media (hover: hover) and (pointer: fine) {
  .timeline-stream:hover .timeline-node {
    opacity: 0.4;
  }

  .timeline-stream:hover .timeline-node:hover {
    opacity: 1;
  }

  .timeline-node:hover .timeline-node-card,
  .timeline-node:focus-within .timeline-node-card {
    border-color: #555555;
  }

  .timeline-node:hover .timeline-node-image::after,
  .timeline-node:focus-within .timeline-node-image::after {
    background: rgba(0, 0, 0, 0.16);
  }
}

@media (hover: none), (pointer: coarse) {
  .timeline-node-copy {
    max-height: none;
  }
}

@keyframes timeline-grow {
  from {
    transform: scaleY(0);
  }

  to {
    transform: scaleY(1);
  }
}

@media (prefers-reduced-motion: reduce) {
  .js-enhanced .timeline-stream::before {
    animation: none;
    transform: none;
  }

  .js-enhanced .timeline-node,
  .timeline-node-card,
  .timeline-node-copy,
  .timeline-node-image::after {
    transition: none !important;
  }
}

@media (max-width: 1240px) {
  .home-overview-grid,
  .section-head,
  .hero-stage-grid,
  .page-lead,
  .detail-hero,
  .selector-layout,
  .selector-summary-grid,
  .selector-choice-grid,
  .selector-meta-grid,
  .selector-reference-grid,
  .detail-meta-grid,
  .route-grid,
  .movement-grid,
  .usecase-grid {
    grid-template-columns: 1fr;
  }

  .family-grid,
  .relation-grid,
  .detail-section-grid,
  .gallery-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .selector-panel {
    position: static;
  }

  .timeline-stream-preview,
  .timeline-stream-meta-grid,
  .timeline-details-grid {
    grid-template-columns: 1fr;
  }

  .field-atlas {
    min-width: 940px;
  }

  .field-atlas--compact {
    min-width: 100%;
  }
}

@media (max-width: 980px) {
  .home-overview-copy {
    padding: 20px;
  }

  .home-overview-map .field-atlas {
    min-width: 100%;
    min-height: 420px;
    padding: 30px 26px;
  }

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

  .hero-stage-grid {
    gap: 16px;
  }

  .hero-grid {
    grid-auto-rows: 240px;
  }

  .hero-tile--hero,
  .hero-tile--tall,
  .hero-tile--wide,
  .hero-tile--standard {
    grid-column: span 1;
    grid-row: span 1;
  }

  .movement-grid,
  .usecase-grid,
  .detail-meta-grid {
    grid-template-columns: 1fr;
  }

  .selector-reference-media {
    min-height: 240px;
  }

  .timeline-nav-head {
    align-items: start;
    flex-direction: column;
  }

  .timeline-nav-track {
    min-width: 920px;
  }

  .timeline-stream-summary,
  .timeline-stream-body {
    grid-template-columns: 1fr;
    grid-template-areas: none;
  }

  .timeline-stream::before {
    display: none;
  }

  .timeline-stream-years {
    grid-auto-flow: column;
    justify-content: start;
    justify-self: start;
    max-width: none;
    text-align: left;
    gap: 14px;
    padding-top: 0;
  }

  .timeline-stream-year-start {
    font-size: clamp(3rem, 13vw, 4.4rem);
  }

  .timeline-stream-year-end {
    padding-left: 0;
    align-self: end;
  }

  .timeline-stream-marker,
  .timeline-stream-body-track,
  .timeline-stream-body-spacer {
    display: none;
  }

  .timeline-stream-summary,
  .timeline-stream-body {
    padding-left: 0;
    padding-right: 0;
  }

  .timeline-stream-preview-copy {
    padding-right: 0;
  }

  .timeline-stream-figure img {
    height: clamp(280px, 46vw, 460px);
  }

  .field-atlas {
    min-width: 860px;
  }

  .field-atlas--compact {
    min-width: 100%;
    min-height: 420px;
  }

  .field-preview-panel {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .home-overview-copy {
    padding: 18px;
  }

  .topbar-inner,
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .route-grid,
  .family-grid,
  .movement-grid,
  .usecase-grid,
  .selector-summary-grid,
  .selector-choice-grid,
  .selector-meta-grid,
  .selector-reference-grid,
  .relation-grid,
  .detail-section-grid,
  .gallery-grid {
    grid-template-columns: 1fr;
  }

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

  .hero-grid {
    grid-auto-rows: 250px;
  }

  .hero-tile--hero,
  .hero-tile--tall,
  .hero-tile--wide,
  .hero-tile--standard {
    grid-column: auto;
  }

  .family-card-media,
  .movement-card-media,
  .usecase-media {
    min-height: 280px;
  }

  .hero-title {
    max-width: none;
  }

  .timeline-nav {
    padding: 14px 14px 16px;
  }

  .timeline-nav-track {
    min-width: 820px;
  }

  .timeline-nav-title {
    max-width: none;
  }

  .timeline-preview-strip {
    grid-template-columns: 1fr;
  }

  .timeline-stream-title {
    max-width: none;
  }

  .field-atlas {
    min-width: 760px;
  }

  .field-atlas--compact {
    min-width: 100%;
    min-height: 360px;
    padding: 26px 24px;
  }

  .field-atlas--compact .field-point-label {
    min-width: 88px;
  }

  .field-preview-media .image-frame img,
  .field-preview-media .image-placeholder {
    min-height: 220px;
  }
}

@media (max-width: 1080px) {
  :root {
    --timeline-year-col: 92px;
    --timeline-spine-x: 115px;
  }

  .timeline-feature-head,
  .home-hero-grid {
    grid-template-columns: 1fr;
    gap: 22px;
  }

  .home-hero-inner {
    max-width: none;
  }

  .home-hero-guide {
    max-width: none;
  }

  .hero-route-buttons {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .timeline-stream::before {
    display: block;
  }
}

@media (max-width: 760px) {
  :root {
    --timeline-year-col: 72px;
    --timeline-spine-x: 94px;
    --timeline-gap: 12px;
  }

  .home-hero {
    min-height: auto;
    padding-top: 18px;
  }

  .home-hero-grid,
  .home-hero-inner {
    gap: 16px;
  }

  .home-hero-title {
    max-width: 10ch;
  }

  .home-hero-title-line {
    font-size: clamp(3rem, 11vw, 4.3rem);
  }

  .home-hero-title-en {
    max-width: 18ch;
    font-size: 0.96rem;
  }

  .home-hero-guide {
    padding: 16px;
  }

  .home-hero-guide-row {
    grid-template-columns: 34px minmax(0, 1fr) auto;
    gap: 12px;
  }

  .home-hero-guide-count {
    font-size: 1.5rem;
  }

  .home-hero-guide-rank {
    justify-self: start;
  }

  .home-hero-stats {
    font-size: 0.68rem;
    line-height: 1.7;
  }

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

  .timeline-nav-head {
    display: grid;
    gap: 10px;
  }

  .timeline-nav-track {
    min-width: 760px;
  }

  .timeline-feature-period-start,
  .timeline-feature-period-end {
    font-size: clamp(2.2rem, 10vw, 3.2rem);
  }

  .timeline-stream::before {
    display: block;
  }

  .timeline-node-year {
    padding-top: 10px;
  }

  .timeline-node-year-number {
    font-size: 1.02rem;
  }

  .timeline-node-year-range {
    font-size: 0.62rem;
  }

  .timeline-node-card {
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 14px;
  }

  .timeline-node-head {
    flex-direction: column;
    align-items: flex-start;
  }

  .timeline-node-title-zh {
    font-size: 1.02rem;
  }

  .timeline-node-title-en {
    font-size: 0.8rem;
  }

  .timeline-node-summary,
  .timeline-node-line {
    font-size: 0.84rem;
  }

  .timeline-node-tag {
    font-size: 0.72rem;
  }

  .timeline-node-label {
    min-width: 0;
    margin-right: 8px;
  }
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.landing-hero {
  border-top: 0;
  min-height: calc(100vh - 88px);
  display: grid;
  align-items: center;
  padding-top: 0;
  padding-bottom: 0;
}

.landing-hero-inner {
  width: min(86rem, 100%);
  display: grid;
  grid-template-columns: minmax(0, 0.94fr) minmax(320px, 1.06fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
  padding: clamp(28px, 6vh, 72px) 0;
}

.landing-hero-copy {
  display: grid;
  gap: 16px;
}

.landing-kicker {
  margin: 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.landing-title {
  margin: 0;
  max-width: 9ch;
  font-family: var(--serif);
  font-size: clamp(3.3rem, 7.8vw, 7.2rem);
  line-height: 0.9;
  letter-spacing: -0.06em;
}

.landing-title span {
  display: block;
}

.landing-flow-lead {
  margin: 0;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.84rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.landing-flow-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.landing-flow-step,
.landing-inline-links {
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.landing-flow-step {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 10px;
  border: 1px solid var(--line);
  background: var(--panel);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.landing-copy {
  display: grid;
  gap: 8px;
  max-width: 38rem;
}

.landing-copy p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1rem;
}

.landing-actions {
  padding-top: 6px;
}

.landing-inline-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin: 0;
}

.landing-inline-links a:hover,
.about-ecosystem-link:hover,
.about-ecosystem-repo:hover {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.landing-preview-shell {
  overflow: hidden;
  padding: 18px;
}

.landing-preview-head {
  display: grid;
  gap: 4px;
  margin-bottom: 14px;
}

.landing-preview-head .eyebrow,
.landing-preview-note {
  margin: 0;
}

.landing-preview-note,
.about-preview-summary,
.about-ecosystem-note,
.about-ecosystem-tags {
  color: var(--ink-soft);
}

.landing-preview-rail {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(220px, 300px);
  gap: 14px;
  overflow-x: auto;
  padding-bottom: 6px;
}

.landing-preview-card,
.about-preview-card {
  display: grid;
  color: inherit;
}

.landing-preview-card {
  border: 1px solid var(--line);
  background: var(--panel);
  overflow: hidden;
}

.landing-preview-media,
.about-preview-media {
  display: block;
  aspect-ratio: 16 / 10;
  border-bottom: 1px solid var(--line);
}

.landing-preview-media .image-frame,
.landing-preview-media img,
.about-preview-media .image-frame,
.about-preview-media img,
.about-step-media .image-frame,
.about-step-media img {
  height: 100%;
}

.landing-preview-media,
.about-preview-media,
.about-step-media {
  position: relative;
  background: var(--panel-muted);
}

.landing-preview-media::after,
.about-preview-media::after,
.about-step-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.32);
  pointer-events: none;
}

.landing-preview-copy,
.about-preview-body,
.about-step-body {
  display: grid;
  gap: 8px;
}

.landing-preview-copy {
  padding: 14px 16px;
}

.landing-preview-title {
  margin: 0;
  color: var(--ink);
  line-height: 1.18;
}

.landing-preview-meta {
  color: var(--ink-soft);
  font-size: 0.88rem;
  line-height: 1.5;
}

.about-hero {
  border-top: 0;
  padding-top: 18px;
}

.about-hero-main {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(320px, 0.96fr);
  gap: 22px;
  align-items: start;
}

.about-hero-copy {
  display: grid;
  gap: 16px;
  max-width: 56rem;
}

.about-hero-title {
  max-width: 11ch;
}

.about-preview-grid,
.about-repo-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.about-preview-grid {
  grid-template-columns: 1fr;
}

.about-preview-card {
  overflow: hidden;
}

.about-preview-body {
  padding: 14px 16px 16px;
}

.about-preview-summary {
  font-size: 0.92rem;
  line-height: 1.55;
}

.about-steps-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.about-step-card {
  overflow: hidden;
}

.about-step-media {
  display: block;
  aspect-ratio: 16 / 9;
  border-bottom: 1px solid var(--line);
}

.about-step-body {
  padding: 18px;
}

.about-step-number {
  margin: 0;
  color: #555555;
  font-family: var(--serif);
  font-size: clamp(2rem, 3vw, 3rem);
  line-height: 0.84;
  letter-spacing: -0.06em;
  text-transform: none;
}

.about-step-card .card-title {
  font-size: 1.4rem;
  line-height: 1.06;
}

.about-ecosystem-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.about-ecosystem-group {
  padding: 18px 18px 20px;
}

.about-ecosystem-group-head {
  display: grid;
  gap: 8px;
  margin-bottom: 14px;
}

.about-ecosystem-group-head .card-kicker,
.about-ecosystem-group-head .card-title,
.about-ecosystem-group-head .card-summary,
.about-ecosystem-item-head,
.about-ecosystem-note,
.about-ecosystem-tags {
  margin: 0;
}

.about-ecosystem-list {
  display: grid;
  gap: 14px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.about-ecosystem-item {
  display: grid;
  gap: 6px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.about-ecosystem-item:first-child {
  padding-top: 0;
  border-top: 0;
}

.about-ecosystem-item-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}

.about-ecosystem-link,
.about-ecosystem-repo {
  color: var(--ink);
}

.about-ecosystem-link {
  font-size: 1rem;
  line-height: 1.3;
}

.about-ecosystem-repo {
  color: var(--ink-soft);
  font-size: 0.82rem;
}

.about-ecosystem-note,
.about-ecosystem-tags {
  font-size: 0.9rem;
  line-height: 1.55;
}

.about-ecosystem-tags {
  font-size: 0.82rem;
}

.browse-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 18px;
}

.browse-filters,
.browse-toolbar-side,
.browse-view-toggle,
.wizard-pill-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.browse-filter,
.browse-view-button,
.wizard-choice-pill span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink-soft);
  cursor: pointer;
  transition: background-color 140ms ease, color 140ms ease, border-color 140ms ease;
}

.browse-filter.is-active,
.browse-view-button.is-active,
.wizard-choice-pill.is-selected span,
.browse-filter:hover,
.browse-view-button:hover {
  border-color: var(--ink);
  color: var(--ink);
  background: #141414;
}

.wizard-choice-pill {
  position: relative;
}

.wizard-choice-pill input,
.selector-visual-choice input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.browse-search input {
  min-width: min(340px, 78vw);
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 0;
  background: var(--panel);
  color: var(--ink);
}

.style-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
}

.style-card-grid.is-list {
  grid-template-columns: 1fr;
}

.style-card {
  overflow: hidden;
}

.style-card-media,
.selector-result-media,
.reference-rail-media {
  display: block;
  aspect-ratio: 16 / 10;
  border-bottom: 1px solid var(--line);
}

.style-card-media .image-frame,
.style-card-media img,
.selector-result-media .image-frame,
.selector-result-media img,
.reference-rail-media .image-frame,
.reference-rail-media img,
.selector-visual-choice .image-frame,
.selector-visual-choice img,
.style-detail-stage-media .image-frame,
.style-detail-stage-media img {
  height: 100%;
}

.style-card-media,
.selector-result-media,
.selector-visual-choice .image-frame,
.style-detail-stage-media {
  position: relative;
  background: var(--panel-muted);
}

.style-card-media::after,
.selector-result-media::after,
.selector-visual-choice .image-frame::after,
.style-detail-stage-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.34);
  pointer-events: none;
}

.style-card-body {
  display: grid;
  gap: 8px;
  padding: 16px 18px;
}

.style-card-title,
.selector-visual-label {
  margin: 0;
}

.style-inline-title {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: baseline;
}

.style-inline-title-zh {
  font-family: var(--serif);
  font-size: 1.42rem;
  line-height: 1.04;
  letter-spacing: -0.04em;
}

.style-inline-title-en {
  color: var(--ink-soft);
  font-size: 0.82rem;
}

.detail-title .style-inline-title-zh {
  font-size: inherit;
  line-height: inherit;
}

.detail-title .style-inline-title-en {
  font-size: 0.28em;
  letter-spacing: 0.04em;
}

.style-card-reference,
.style-card-fit,
.style-card-skill,
.browse-empty {
  margin: 0;
  color: var(--ink-soft);
}

.style-card-reference {
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.style-card-skill {
  font-size: 0.82rem;
  line-height: 1.55;
}

.reference-rail {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(240px, 320px);
  gap: 16px;
  overflow-x: auto;
  padding-bottom: 8px;
}

.reference-rail-card {
  overflow: hidden;
}

.style-detail-hero {
  border-top: 0;
  padding-top: 10px;
}

.style-detail-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.style-detail-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.style-detail-head {
  margin-bottom: 16px;
}

.style-detail-head .detail-summary {
  max-width: 46rem;
  margin: 10px 0 0;
}

.style-detail-stage {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
}

.style-detail-stage-media {
  display: block;
  border-right: 1px solid var(--line);
  aspect-ratio: 16 / 9;
}

.style-detail-stage-copy {
  display: grid;
  align-content: start;
  gap: 12px;
  padding: 20px;
}

.style-detail-core-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.style-skill-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.style-detail-relation-strip .card-body {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.history-fold {
  overflow: hidden;
}

.history-fold summary {
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.history-fold-body {
  padding: 0 20px 20px;
  border-top: 1px solid var(--line);
}

.history-origin-list {
  display: grid;
  gap: 14px;
}

.history-origin-item {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  gap: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
}

.history-origin-year {
  color: #666666;
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.history-origin-copy h3,
.history-origin-copy p {
  margin: 0;
}

.history-origin-copy {
  display: grid;
  gap: 8px;
}

.history-origin-copy p {
  color: var(--ink-soft);
}

.selector-wizard-shell {
  padding-top: 18px;
}

.selector-wizard-layout {
  display: grid;
  grid-template-columns: minmax(300px, 0.78fr) minmax(0, 1.22fr);
  gap: 18px;
  align-items: start;
}

.selector-wizard-questions {
  position: sticky;
  top: 88px;
  display: grid;
  gap: 16px;
}

.selector-step .card-body {
  gap: 16px;
}

.selector-visual-group {
  display: grid;
  gap: 12px;
}

.selector-visual-grid,
.selector-recommendation-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.selector-recommendation-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.selector-visual-choice {
  display: grid;
  gap: 10px;
  padding: 10px;
  border: 1px solid var(--line);
  background: var(--panel);
  cursor: pointer;
}

.selector-visual-choice .image-frame {
  aspect-ratio: 16 / 10;
}

.selector-visual-choice.is-selected {
  border-color: var(--ink);
}

.selector-wizard-results {
  display: grid;
  gap: 16px;
}

.selector-result-card {
  overflow: hidden;
}

@media (max-width: 1080px) {
  .landing-hero-inner,
  .about-preview-grid,
  .about-repo-grid,
  .about-ecosystem-grid,
  .about-steps-grid,
  .selector-wizard-layout,
  .style-detail-stage,
  .style-detail-core-grid,
  .style-skill-grid,
  .style-detail-relation-strip .card-body,
  .selector-recommendation-grid {
    grid-template-columns: 1fr;
  }

  .selector-wizard-questions {
    position: static;
  }

  .about-hero-title {
    max-width: none;
  }
}

@media (max-width: 760px) {
  .landing-hero {
    min-height: auto;
  }

  .landing-hero-inner {
    gap: 20px;
  }

  .landing-title {
    font-size: clamp(2.9rem, 13vw, 4.8rem);
  }

  .landing-flow-strip,
  .landing-inline-links {
    gap: 8px;
  }

  .landing-preview-shell,
  .about-ecosystem-group {
    padding: 14px;
  }

  .landing-preview-rail {
    grid-auto-columns: minmax(220px, 84vw);
  }

  .browse-toolbar,
  .style-detail-topline {
    flex-direction: column;
    align-items: stretch;
  }

  .selector-visual-grid,
  .selector-recommendation-grid,
  .style-card-grid,
  .style-detail-core-grid,
  .style-skill-grid,
  .style-detail-relation-strip .card-body {
    grid-template-columns: 1fr;
  }

  .history-origin-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .about-step-body,
  .about-preview-body {
    padding-left: 14px;
    padding-right: 14px;
  }

  .about-step-card .card-title {
    font-size: 1.2rem;
  }

  .style-detail-stage-media {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
}