:root {
  --reference-ink: #172033;
  --reference-muted: #596273;
  --reference-faint: #8991a0;
  --reference-line: #dfe3e8;
  --reference-soft: #f5f7f8;
  --reference-green: #205f56;
  --reference-blue: #285d91;
  --reference-copper: #9a5b22;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
}

.knowledge-reference-page {
  min-width: 320px;
  color: var(--reference-ink);
  background: #fff;
  font-family: "Noto Sans CJK SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

.reading-progress {
  position: fixed;
  z-index: 80;
  top: 0;
  right: 0;
  left: 0;
  height: 2px;
  background: transparent;
}

.reading-progress span {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--reference-green);
  transform: scaleX(0);
  transform-origin: left center;
}

.reference-header {
  position: sticky;
  z-index: 60;
  top: 0;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  height: 64px;
  padding: 0 30px;
  border-bottom: 1px solid var(--reference-line);
  background: rgb(255 255 255 / 96%);
  backdrop-filter: blur(14px);
}

.reference-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--reference-ink);
}

.reference-brand-mark {
  display: grid;
  width: 32px;
  height: 32px;
  color: var(--reference-blue);
  place-items: center;
}

.reference-brand-mark svg {
  width: 20px;
  height: 20px;
}

.reference-brand strong,
.reference-brand small {
  display: block;
}

.reference-brand strong {
  font-size: 15px;
  line-height: 1.3;
}

.reference-brand small {
  margin-top: 1px;
  color: var(--reference-faint);
  font-size: 10px;
  line-height: 1.2;
}

.reference-top-nav {
  display: flex;
  align-self: stretch;
  justify-content: center;
  gap: 30px;
}

.reference-top-nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  color: #3f4856;
  font-size: 14px;
}

.reference-top-nav a.is-active {
  color: var(--reference-blue);
  font-weight: 650;
}

.reference-top-nav a.is-active::after {
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 2px;
  background: var(--reference-blue);
  content: "";
}

.reference-header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.reference-icon-button {
  display: grid;
  width: 36px;
  height: 36px;
  padding: 0;
  color: var(--reference-muted);
  border: 1px solid var(--reference-line);
  border-radius: 6px;
  background: #fff;
  place-items: center;
  cursor: pointer;
}

.reference-icon-button svg {
  width: 16px;
}

.directory-toggle,
.site-rail-scrim {
  display: none;
}

.reference-layout {
  display: grid;
  grid-template-columns: 244px minmax(0, 960px) 244px;
  justify-content: center;
  width: 100%;
  max-width: 1448px;
  margin-inline: auto;
  min-height: calc(100vh - 64px);
}

.site-rail,
.page-rail {
  position: sticky;
  top: 64px;
  align-self: start;
  height: calc(100vh - 64px);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: #cbd1d8 transparent;
}

.site-rail {
  padding: 34px 18px 24px;
  border-right: 1px solid var(--reference-line);
  background: #fafbfb;
}

.site-rail-heading {
  padding: 0 10px 18px;
  border-bottom: 1px solid var(--reference-line);
}

.site-rail-heading span,
.site-rail-heading strong,
.site-rail-heading small {
  display: block;
}

.site-rail-heading span {
  color: var(--reference-faint);
  font-size: 10px;
}

.site-rail-heading strong {
  margin-top: 5px;
  font-family: "Songti SC", "STSong", serif;
  font-size: 22px;
}

.site-rail-heading small {
  margin-top: 7px;
  color: var(--reference-faint);
  font-size: 10px;
}

.site-directory-search {
  display: grid;
  grid-template-columns: 16px minmax(0, 1fr);
  align-items: center;
  gap: 7px;
  margin: 16px 4px 10px;
  padding: 0 9px;
  border: 1px solid var(--reference-line);
  border-radius: 4px;
  background: #fff;
}

.site-directory-search > span,
.site-directory-search svg {
  width: 14px;
  height: 14px;
  color: var(--reference-faint);
}

.site-directory-search input {
  width: 100%;
  height: 34px;
  padding: 0;
  color: var(--reference-ink);
  border: 0;
  outline: 0;
  background: transparent;
  font: inherit;
  font-size: 13px;
}

.site-directory-search:focus-within {
  border-color: var(--reference-green);
}

.site-directory {
  display: grid;
  gap: 18px;
  padding: 2px 0 12px;
}

.site-directory-group[hidden] {
  display: none;
}

.site-directory-group h2 {
  margin: 0 9px 5px;
  color: var(--reference-faint);
  font-size: 12px;
  font-weight: 650;
  line-height: 1.5;
}

.site-directory a {
  display: block;
  padding: 8px 9px;
  color: #626b78;
  border-left: 2px solid transparent;
  line-height: 1.4;
}

.site-directory a[hidden] {
  display: none;
}

.site-directory strong {
  color: inherit;
  font-size: 13px;
  font-weight: 560;
}

.site-directory a:hover,
.site-directory a.is-active {
  color: var(--reference-green);
  border-left-color: var(--reference-green);
  background: #eef5f3;
}

.site-directory-empty {
  margin: 8px 10px 18px;
  color: var(--reference-faint);
  font-size: 13px;
  line-height: 1.65;
}

.site-rail-footer {
  margin: 8px 10px 0;
  padding-top: 16px;
  border-top: 1px solid var(--reference-line);
}

.site-rail-footer a {
  color: var(--reference-green);
  font-size: 12px;
}

.page-rail {
  padding: 42px 18px 30px;
  border-left: 1px solid var(--reference-line);
  background: #fff;
}

.page-rail-heading {
  padding: 0 8px 16px;
  border-bottom: 1px solid var(--reference-line);
}

.page-rail-heading span,
.page-rail-heading strong {
  display: block;
}

.page-rail-heading span {
  color: var(--reference-faint);
  font-size: 11px;
}

.page-rail-heading strong {
  margin-top: 4px;
  font-size: 13px;
  line-height: 1.5;
}

.page-rail nav {
  display: grid;
  padding: 10px 0 24px;
}

.page-rail-group {
  padding: 7px 0 10px;
  border-bottom: 1px solid var(--reference-line);
}

.page-rail-group:last-child {
  border-bottom: 0;
}

.page-rail-features {
  display: grid;
  margin-top: 2px;
}

.page-rail nav a {
  display: block;
  padding: 6px 9px;
  color: #626b78;
  border-left: 2px solid transparent;
  overflow-wrap: anywhere;
  font-size: 12px;
  line-height: 1.5;
}

.page-rail nav .page-rail-chapter {
  color: var(--reference-ink);
  font-size: 13px;
  font-weight: 680;
}

.page-rail nav .page-rail-feature {
  padding-left: 18px;
  color: #6c7480;
}

.page-rail nav a:hover,
.page-rail nav a.is-active {
  color: var(--reference-green);
  border-left-color: var(--reference-green);
}

.reference-content {
  min-width: 0;
  padding: 0 44px 90px;
}

.document-lead {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(270px, .75fr);
  gap: 64px;
  padding: 64px 0 54px;
  border-bottom: 1px solid var(--reference-line);
}

.document-kicker {
  margin: 0 0 15px;
  color: var(--reference-green);
  font-size: 12px;
  font-weight: 700;
}

.document-kicker span {
  padding: 0 6px;
  color: #b3b8c0;
}

.document-lead h1 {
  margin: 0;
  font-family: "Songti SC", "STSong", serif;
  font-size: 42px;
  font-weight: 700;
  line-height: 1.2;
}

.document-lead-copy > p:last-child {
  max-width: 650px;
  margin: 20px 0 0;
  color: #444d5b;
  font-size: 17px;
  line-height: 1.8;
}

.document-facts {
  margin: 1px 0 0;
  border-top: 2px solid var(--reference-ink);
}

.document-facts > div {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 14px;
  padding: 13px 0;
  border-bottom: 1px solid var(--reference-line);
}

.document-facts dt,
.document-facts dd {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
}

.document-facts dt {
  color: var(--reference-faint);
}

.document-facts dd {
  color: var(--reference-ink);
}

.reference-primer {
  padding: 48px 0 32px;
  border-bottom: 1px solid var(--reference-line);
}

.primer-heading {
  max-width: 820px;
}

.primer-heading p,
.primer-heading h2,
.primer-heading span {
  margin: 0;
}

.primer-heading p {
  color: var(--reference-copper);
  font-size: 12px;
  font-weight: 700;
}

.primer-heading h2 {
  margin-top: 10px;
  font-family: "Songti SC", "STSong", serif;
  font-size: 30px;
  line-height: 1.35;
}

.primer-heading span {
  display: block;
  max-width: 760px;
  margin-top: 12px;
  color: var(--reference-muted);
  font-size: 15px;
  line-height: 1.75;
}

.term-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  margin: 30px 0 0;
  border-top: 1px solid var(--reference-line);
}

.term-list > div {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 24px;
  padding: 12px 0;
  border-bottom: 1px solid var(--reference-line);
}

.term-list dt,
.term-list dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
}

.term-list dt {
  color: var(--reference-ink);
  font-weight: 650;
}

.term-list dd {
  color: var(--reference-muted);
}

.rule-summary {
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  gap: 28px;
  margin-top: 24px;
  padding: 0 0 0 16px;
  border-left: 2px solid var(--reference-copper);
}

.rule-summary strong,
.rule-summary p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
}

.rule-summary strong {
  color: var(--reference-copper);
}

.rule-summary p {
  color: var(--reference-muted);
}

.lifecycle-line {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  margin: 28px 0 0;
  padding: 0;
  border-top: 1px solid var(--reference-line);
  border-bottom: 1px solid var(--reference-line);
  list-style: none;
}

.lifecycle-line li {
  min-width: 0;
  padding: 14px 12px;
  color: var(--reference-muted);
  border-right: 1px solid var(--reference-line);
  font-size: 13px;
  line-height: 1.55;
}

.lifecycle-line li:last-child {
  border-right: 0;
}

.lifecycle-line span {
  display: block;
  margin-bottom: 3px;
  color: var(--reference-green);
  font-weight: 700;
}

.mobile-chapter-nav {
  display: none;
}

.reference-chapter {
  padding-top: 72px;
  scroll-margin-top: 62px;
}

.chapter-heading {
  padding-bottom: 28px;
}

.knowledge-reference-page:not(.product-reference-page) .chapter-heading > span,
.knowledge-reference-page:not(.product-reference-page) .chapter-heading > div > p,
.knowledge-reference-page:not(.product-reference-page) .feature-number {
  display: none;
}

.chapter-heading p,
.chapter-heading h2,
.chapter-heading small {
  margin: 0;
}

.chapter-heading p {
  color: var(--reference-copper);
  font-size: 12px;
  font-weight: 700;
}

.chapter-heading h2 {
  font-family: "Songti SC", "STSong", serif;
  font-size: 30px;
  line-height: 1.3;
}

.chapter-heading small {
  display: block;
  max-width: 680px;
  margin-top: 8px;
  color: var(--reference-muted);
  font-size: 15px;
  line-height: 1.75;
}

.feature-section {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 36px;
  padding: 38px 0 52px;
  border-top: 1px solid var(--reference-line);
  scroll-margin-top: 92px;
}

.feature-section-final {
  padding-bottom: 34px;
}

.feature-section.is-text-only {
  grid-template-columns: minmax(0, 720px);
}

.feature-section.is-text-only .feature-copy {
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  column-gap: 34px;
}

.feature-section.is-text-only .feature-number,
.feature-section.is-text-only .feature-copy h3 {
  grid-column: 1;
}

.feature-section.is-text-only .feature-copy > p,
.feature-section.is-text-only .feature-copy > dl {
  grid-column: 2;
}

.feature-section.is-text-only .feature-copy > p:not(.feature-note) {
  grid-row: 1 / span 2;
  margin-top: 0;
}

.feature-section.is-text-only .feature-copy > dl {
  margin-top: 18px;
}

.feature-section.is-text-only .feature-note {
  grid-column: 2;
}

.feature-copy {
  min-width: 0;
}

.feature-number {
  color: var(--reference-green);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 12px;
  font-weight: 700;
}

.feature-copy h3 {
  margin: 0;
  font-size: 22px;
  font-weight: 680;
  line-height: 1.45;
}

.feature-copy > p:not(.feature-note) {
  margin: 12px 0 0;
  color: var(--reference-muted);
  font-size: 15px;
  line-height: 1.8;
}

.feature-copy dl {
  margin: 18px 0 0;
  border-top: 1px solid var(--reference-line);
}

.feature-copy dl > div {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 9px;
  padding: 9px 0;
  border-bottom: 1px solid var(--reference-line);
}

.feature-copy dt,
.feature-copy dd {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
}

.feature-copy dt {
  color: var(--reference-faint);
}

.feature-copy dd {
  color: #3c4654;
}

.feature-note {
  margin: 16px 0 0;
  padding: 11px 0 0 13px;
  color: #6b4b2c;
  border-top: 1px solid #d8c4ae;
  border-left: 2px solid var(--reference-copper);
  font-size: 13px;
  line-height: 1.75;
}

.feature-note strong {
  display: block;
  margin-bottom: 2px;
  color: #71451f;
}

.compact-reference {
  display: grid;
  grid-column: 1 / -1;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 0 28px;
  padding: 24px 0 2px;
  border-top: 1px solid var(--reference-line);
}

.compact-reference > header h4,
.compact-reference > header p,
.compact-reference-note {
  margin: 0;
}

.compact-reference > header h4 {
  font-size: 17px;
  line-height: 1.5;
}

.compact-reference > header p {
  margin-top: 6px;
  color: var(--reference-faint);
  font-size: 13px;
  line-height: 1.7;
}

.compact-reference-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: 26px;
  margin: 0;
  border-top: 1px solid var(--reference-line);
}

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

.compact-reference-list > div {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 10px;
  padding: 11px 0;
  border-bottom: 1px solid var(--reference-line);
}

.compact-reference-list dt,
.compact-reference-list dd {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
}

.compact-reference-list dt {
  color: var(--reference-ink);
  font-weight: 650;
}

.compact-reference-list dd {
  color: var(--reference-muted);
}

.compact-reference-note {
  display: grid;
  grid-column: 1 / -1;
  grid-template-columns: 152px minmax(0, 1fr);
  gap: 28px;
  margin-top: 20px;
  padding: 0 0 0 14px;
  color: var(--reference-muted);
  border-left: 2px solid var(--reference-green);
  font-size: 13px;
  line-height: 1.75;
}

.compact-reference-note strong {
  color: var(--reference-green);
}

.product-shot {
  min-width: 0;
  margin: 0;
}

.product-shot img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid #cfd5dc;
  border-radius: 4px;
  background: #f4f6f7;
  cursor: zoom-in;
}

.product-shot.is-portrait img {
  width: min(100%, 520px);
  margin-inline: auto;
}

.product-shot.is-compact img {
  width: min(100%, 660px);
  margin-inline: auto;
}

.product-shot figcaption {
  margin-top: 9px;
  color: var(--reference-faint);
  font-size: 12px;
  line-height: 1.65;
}

.shot-sequence {
  display: grid;
  gap: 28px;
}

.reference-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 30px;
  padding: 24px 0 0;
  color: var(--reference-faint);
  border-top: 1px solid var(--reference-line);
  font-size: 12px;
}

.reference-footer p {
  margin: 0;
}

.reference-footer a {
  color: var(--reference-green);
}

.reference-viewer {
  width: 100vw;
  max-width: none;
  height: 100vh;
  max-height: none;
  margin: 0;
  padding: 48px;
  overflow: hidden;
  border: 0;
  background: rgb(11 17 24 / 94%);
}

.reference-viewer::backdrop {
  background: transparent;
}

.reference-viewer > img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.reference-viewer button {
  position: absolute;
  top: 16px;
  right: 18px;
  display: grid;
  width: 38px;
  height: 38px;
  padding: 0;
  color: #fff;
  border: 1px solid rgb(255 255 255 / 28%);
  border-radius: 6px;
  background: rgb(0 0 0 / 24%);
  place-items: center;
  cursor: pointer;
}

.reference-viewer button svg {
  width: 18px;
}

html[data-theme="dark"] .knowledge-reference-page {
  --reference-ink: #eef3f7;
  --reference-muted: #b4beca;
  --reference-faint: #7f8c9b;
  --reference-line: #263241;
  --reference-soft: #101822;
  --reference-green: #7ac8b8;
  --reference-blue: #91bde8;
  --reference-copper: #d5a16f;
  background: #0b1119;
}

html[data-theme="dark"] .reference-header {
  background: rgb(11 17 25 / 96%);
}

html[data-theme="dark"] .site-rail {
  background: #0e1620;
}

html[data-theme="dark"] .page-rail {
  background: #0b1119;
}

html[data-theme="dark"] .reference-icon-button {
  color: var(--reference-muted);
  background: #111b27;
}

html[data-theme="dark"] .site-directory-search {
  background: #111b27;
}

html[data-theme="dark"] .site-directory a.is-active,
html[data-theme="dark"] .site-directory a:hover {
  background: #142620;
}

html[data-theme="dark"] .reference-top-nav a,
html[data-theme="dark"] .document-lead-copy > p:last-child,
html[data-theme="dark"] .feature-copy dd {
  color: var(--reference-muted);
}

html[data-theme="dark"] .product-shot img {
  border-color: #344253;
  background: #111a24;
}

@media (max-width: 1320px) {
  .reference-layout {
    grid-template-columns: 232px minmax(0, 960px);
    max-width: 1192px;
  }

  .page-rail {
    display: none;
  }

  .reference-content {
    padding-inline: 42px;
  }

  .document-lead {
    gap: 36px;
  }

  .mobile-chapter-nav {
    display: flex;
    gap: 8px;
    margin-inline: -42px;
    padding: 14px 42px;
    overflow-x: auto;
    border-bottom: 1px solid var(--reference-line);
    scrollbar-width: none;
    white-space: nowrap;
  }

  .mobile-chapter-nav::-webkit-scrollbar {
    display: none;
  }

  .mobile-chapter-nav a {
    flex: 0 0 auto;
    padding: 6px 9px;
    color: var(--reference-muted);
    border: 1px solid var(--reference-line);
    border-radius: 4px;
    font-size: 13px;
  }

  .mobile-chapter-nav a.is-active {
    color: var(--reference-green);
    border-color: var(--reference-green);
  }

  .feature-section {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 28px;
  }

  .reference-top-nav {
    gap: 20px;
  }
}

@media (max-width: 980px) {
  body.site-directory-open {
    overflow: hidden;
  }

  .directory-toggle {
    display: grid;
  }

  .reference-layout {
    display: block;
    max-width: none;
  }

  .site-rail {
    position: fixed;
    z-index: 72;
    top: 64px;
    left: 0;
    width: min(310px, calc(100vw - 46px));
    height: calc(100vh - 64px);
    transform: translateX(-101%);
    box-shadow: 16px 0 36px rgb(21 29 39 / 14%);
    transition: transform 180ms ease;
  }

  .site-directory-open .site-rail {
    transform: translateX(0);
  }

  .site-rail-scrim {
    position: fixed;
    z-index: 68;
    top: 64px;
    right: 0;
    bottom: 0;
    left: min(310px, calc(100vw - 46px));
    display: block;
    padding: 0;
    pointer-events: none;
    visibility: hidden;
    border: 0;
    background: rgb(9 15 22 / 48%);
    opacity: 0;
    transition: opacity 180ms ease, visibility 0s linear 180ms;
  }

  .site-directory-open .site-rail-scrim {
    pointer-events: auto;
    visibility: visible;
    opacity: 1;
    transition-delay: 0s;
  }

  .reference-content {
    width: min(100%, 880px);
    margin-inline: auto;
  }
}

@media (max-width: 860px) {
  .reference-header {
    grid-template-columns: auto 1fr;
    padding-inline: 18px;
  }

  .reference-top-nav {
    display: none;
  }

  .reference-header-actions {
    justify-self: end;
  }

  .reference-content {
    width: min(100%, 760px);
    margin-inline: auto;
    padding: 0 24px 72px;
  }

  .document-lead {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-top: 46px;
  }

  .primer-heading {
    grid-template-columns: 1fr;
  }

  .primer-heading p {
    grid-column: auto;
  }

  .term-list {
    grid-template-columns: 1fr;
  }

  .rule-summary {
    grid-template-columns: 1fr;
    gap: 5px;
  }

  .lifecycle-line {
    grid-template-columns: repeat(5, 144px);
    overflow-x: auto;
    scrollbar-width: thin;
  }

  .mobile-chapter-nav {
    margin-inline: -24px;
    padding-inline: 24px;
  }

  .feature-section {
    grid-template-columns: 1fr;
  }

  .feature-section.is-text-only .feature-copy {
    display: block;
  }

  .feature-section.is-text-only .feature-copy > p:not(.feature-note),
  .feature-section.is-text-only .feature-copy > dl {
    margin-top: 12px;
  }

  .compact-reference {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .compact-reference-note {
    grid-template-columns: 108px minmax(0, 1fr);
    gap: 16px;
  }

  .scope-reference-list {
    grid-template-columns: 1fr;
  }

  .feature-copy {
    max-width: 600px;
  }
}

@media (max-width: 560px) {
  .reference-header {
    height: 58px;
  }

  .reference-brand small {
    display: none;
  }

  .reference-layout {
    min-height: calc(100vh - 58px);
  }

  .site-rail,
  .site-rail-scrim {
    top: 58px;
  }

  .site-rail {
    height: calc(100vh - 58px);
  }

  .reference-content {
    padding-inline: 18px;
  }

  .document-lead {
    padding: 36px 0 38px;
  }

  .document-lead h1 {
    font-size: 34px;
  }

  .document-lead-copy > p:last-child {
    font-size: 15px;
    line-height: 1.85;
  }

  .document-facts > div {
    grid-template-columns: 72px 1fr;
  }

  .reference-primer {
    padding-top: 38px;
  }

  .term-list > div {
    grid-template-columns: 78px minmax(0, 1fr);
  }

  .mobile-chapter-nav {
    margin-inline: -18px;
    padding-inline: 18px;
  }

  .reference-chapter {
    padding-top: 54px;
  }

  .chapter-heading {
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 12px;
  }

  .chapter-heading > span {
    font-size: 32px;
  }

  .chapter-heading h2 {
    font-size: 26px;
  }

  .feature-section {
    gap: 24px;
    padding: 30px 0 40px;
  }

  .feature-copy h3 {
    font-size: 19px;
  }

  .compact-reference-list {
    grid-template-columns: 1fr;
  }

  .compact-reference-note {
    grid-template-columns: 1fr;
    gap: 3px;
  }

  .reference-viewer {
    padding: 42px 8px 12px;
  }
}

.conversation-specification-page .document-lead h1 {
  max-width: 620px;
}

.specification-section {
  padding: 72px 0 30px;
  border-bottom: 1px solid var(--reference-line);
  scroll-margin-top: 62px;
}

.specification-heading {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
  margin-bottom: 34px;
}

.specification-heading > span {
  color: var(--reference-green);
  font-family: "Songti SC", "STSong", serif;
  font-size: 34px;
  line-height: 1;
}

.specification-heading h2,
.specification-heading p {
  margin: 0;
}

.specification-heading h2 {
  font-family: "Songti SC", "STSong", serif;
  font-size: 30px;
  line-height: 1.25;
}

.specification-heading p {
  max-width: 720px;
  margin-top: 9px;
  color: var(--reference-muted);
  font-size: 15px;
  line-height: 1.75;
}

.specification-intro {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 36px;
}

.specification-intro article {
  padding: 20px 0 0;
  border-top: 2px solid var(--reference-ink);
}

.specification-intro h3,
.specification-intro p,
.specification-subsection > h3,
.scenario-grid h4,
.scenario-grid p {
  margin: 0;
}

.specification-intro h3,
.specification-subsection > h3 {
  font-size: 18px;
  line-height: 1.5;
}

.specification-intro p {
  margin-top: 10px;
  color: var(--reference-muted);
  font-size: 14px;
  line-height: 1.8;
}

.specification-subsection {
  margin-top: 42px;
}

.value-chain {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 18px 0 0;
  padding: 0;
  border-top: 1px solid var(--reference-line);
  border-bottom: 1px solid var(--reference-line);
  list-style: none;
}

.value-chain li {
  padding: 18px 18px 20px;
  border-right: 1px solid var(--reference-line);
}

.value-chain li:last-child {
  border-right: 0;
}

.value-chain strong,
.value-chain span {
  display: block;
}

.value-chain strong {
  color: var(--reference-blue);
  font-size: 14px;
}

.value-chain span {
  margin-top: 6px;
  color: var(--reference-muted);
  font-size: 13px;
  line-height: 1.7;
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 18px;
  margin-top: 18px;
}

.scenario-grid article {
  padding-top: 14px;
  border-top: 1px solid var(--reference-line);
}

.scenario-grid h4 {
  color: var(--reference-copper);
  font-size: 14px;
}

.scenario-grid p {
  margin-top: 6px;
  color: var(--reference-muted);
  font-size: 13px;
  line-height: 1.7;
}

.relationship-map {
  margin: 0;
  padding: 26px;
  overflow-x: auto;
  border-top: 2px solid var(--reference-ink);
  border-bottom: 1px solid var(--reference-line);
  background: var(--reference-soft);
}

.relationship-map figcaption {
  margin-bottom: 18px;
  color: var(--reference-faint);
  font-size: 11px;
  font-weight: 700;
}

.relationship-row {
  display: grid;
  grid-template-columns: minmax(116px, 1fr) 52px minmax(116px, 1fr) 52px minmax(116px, 1fr) 52px minmax(116px, 1fr);
  align-items: center;
  min-width: 720px;
}

.relationship-row.is-secondary {
  grid-template-columns: minmax(150px, 1fr) 52px minmax(180px, 1.2fr) 52px minmax(150px, 1fr);
  width: calc(75% - 13px);
  margin-top: 18px;
}

.relationship-node {
  display: grid;
  min-height: 66px;
  padding: 10px 12px;
  text-align: center;
  border: 1px solid var(--reference-line);
  border-top-width: 3px;
  border-radius: 4px;
  background: #fff;
  font-size: 14px;
  font-weight: 680;
  line-height: 1.45;
  place-items: center;
}

.relationship-node.is-entry,
.relationship-node.is-record {
  border-top-color: var(--reference-copper);
}

.relationship-node.is-topic,
.relationship-node.is-project {
  border-top-color: var(--reference-blue);
}

.relationship-node.is-employee,
.relationship-node.is-skill {
  border-top-color: var(--reference-green);
}

.relationship-link {
  color: var(--reference-faint);
  text-align: center;
  font-size: 11px;
}

.relationship-map > p {
  max-width: 720px;
  margin: 22px 0 0;
  color: var(--reference-muted);
  font-size: 13px;
  line-height: 1.75;
}

.object-glossary {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 36px;
  margin: 28px 0 0;
}

.object-glossary > div {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 16px;
  padding: 16px 0;
  border-top: 1px solid var(--reference-line);
}

.object-glossary dt,
.object-glossary dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
}

.object-glossary dt {
  color: var(--reference-ink);
  font-weight: 680;
}

.object-glossary dd {
  color: var(--reference-muted);
}

.specification-visual-block {
  margin-top: 34px;
  padding-top: 26px;
  border-top: 1px solid var(--reference-line);
}

.specification-visual-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 24px;
}

.specification-visual {
  width: 100%;
  margin: 0;
}

.specification-visual.is-portrait {
  width: min(100%, 420px);
}

.specification-visual img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--reference-line);
  border-radius: 4px;
  background: #fff;
  cursor: zoom-in;
}

.specification-visual figcaption {
  margin-top: 9px;
  color: var(--reference-faint);
  font-size: 12px;
  line-height: 1.65;
}

.capability-list {
  border-top: 2px solid var(--reference-ink);
}

.capability-row {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 20px;
  padding: 28px 0;
  border-bottom: 1px solid var(--reference-line);
  scroll-margin-top: 92px;
}

.capability-index {
  color: var(--reference-faint);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 13px;
}

.capability-row h3,
.capability-row p {
  margin: 0;
}

.capability-row h3 {
  font-size: 20px;
  line-height: 1.5;
}

.capability-row p {
  max-width: 760px;
  margin-top: 9px;
  color: var(--reference-muted);
  font-size: 14px;
  line-height: 1.8;
}

.capability-row ul {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.capability-row li {
  padding: 10px 0 0 14px;
  color: #3f4a58;
  border-top: 1px solid var(--reference-line);
  border-left: 2px solid var(--reference-green);
  font-size: 13px;
  line-height: 1.65;
}

.capability-evidence {
  margin-top: 28px;
}

.capability-evidence-group {
  padding-top: 18px;
  border-top: 1px solid var(--reference-line);
}

.capability-evidence-group + .capability-evidence-group {
  margin-top: 26px;
}

.capability-evidence-group > h4 {
  margin: 0;
  color: var(--reference-ink);
  font-size: 14px;
  font-weight: 680;
  line-height: 1.5;
}

.capability-evidence-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: start;
  gap: 20px;
  margin-top: 13px;
}

.capability-evidence-grid > .is-wide,
.capability-evidence-grid > :only-child {
  grid-column: 1 / -1;
}

.boundary-list {
  margin: 0;
  border-top: 2px solid var(--reference-ink);
}

.boundary-list > div {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 30px;
  padding: 20px 0;
  border-bottom: 1px solid var(--reference-line);
}

.boundary-list dt,
.boundary-list dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
}

.boundary-list dt {
  color: var(--reference-copper);
  font-weight: 680;
}

.boundary-list dd {
  color: var(--reference-muted);
}

.security-rules {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 36px;
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--reference-ink);
  list-style: none;
}

.security-rules li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 14px;
  padding: 22px 0;
  border-bottom: 1px solid var(--reference-line);
}

.security-rules li > span {
  color: var(--reference-blue);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 12px;
}

.security-rules strong,
.security-rules p {
  margin: 0;
}

.security-rules strong {
  font-size: 15px;
}

.security-rules p {
  margin-top: 6px;
  color: var(--reference-muted);
  font-size: 13px;
  line-height: 1.75;
}

.case-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 26px;
}

.case-study {
  padding: 20px 0 4px;
  border-top: 2px solid var(--reference-ink);
  scroll-margin-top: 92px;
}

.case-study header > span,
.case-study h3 {
  display: block;
  margin: 0;
}

.case-study header > span {
  color: var(--reference-green);
  font-size: 11px;
  font-weight: 700;
}

.case-study h3 {
  margin-top: 7px;
  font-size: 18px;
  line-height: 1.5;
}

.case-study dl {
  margin: 18px 0 0;
}

.case-study dl > div {
  padding: 12px 0;
  border-top: 1px solid var(--reference-line);
}

.case-study dt,
.case-study dd {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
}

.case-study dt {
  color: var(--reference-faint);
}

.case-study dd {
  margin-top: 4px;
  color: var(--reference-muted);
}

.appendix-block {
  padding: 30px 0 16px;
  border-top: 1px solid var(--reference-line);
  scroll-margin-top: 92px;
}

.appendix-block > h3 {
  margin: 0 0 16px;
  font-size: 19px;
}

.specification-table-wrap {
  overflow-x: auto;
}

.specification-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  table-layout: fixed;
}

.specification-table th,
.specification-table td {
  padding: 13px 14px;
  text-align: left;
  border: 1px solid var(--reference-line);
  font-size: 13px;
  line-height: 1.7;
  vertical-align: top;
}

.specification-table thead th {
  background: var(--reference-soft);
  font-weight: 680;
}

.specification-table th:first-child {
  width: 154px;
}

.specification-table tbody th {
  color: var(--reference-ink);
  font-weight: 680;
}

.specification-table td {
  color: var(--reference-muted);
}

.unsupported-list {
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--reference-ink);
  list-style: none;
}

.unsupported-list li {
  position: relative;
  padding: 14px 0 14px 28px;
  color: var(--reference-muted);
  border-bottom: 1px solid var(--reference-line);
  font-size: 14px;
  line-height: 1.75;
}

.unsupported-list li::before {
  position: absolute;
  top: 21px;
  left: 4px;
  width: 8px;
  height: 8px;
  border: 1px solid var(--reference-copper);
  border-radius: 50%;
  content: "";
}

html[data-theme="dark"] .relationship-node {
  background: #111b27;
}

html[data-theme="dark"] .specification-visual img {
  background: #111b27;
}

html[data-theme="dark"] .capability-row li {
  color: var(--reference-muted);
}

@media (max-width: 860px) {
  .specification-intro,
  .object-glossary,
  .security-rules {
    grid-template-columns: 1fr;
  }

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

  .value-chain li:nth-child(2) {
    border-right: 0;
  }

  .value-chain li:nth-child(-n + 2) {
    border-bottom: 1px solid var(--reference-line);
  }

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

  .specification-visual-grid {
    grid-template-columns: 1fr;
  }

  .capability-evidence-grid {
    grid-template-columns: 1fr;
  }

  .capability-evidence-grid > .is-wide,
  .capability-evidence-grid > :only-child {
    grid-column: auto;
  }

  .capability-row ul,
  .case-list {
    grid-template-columns: 1fr;
  }

  .case-list {
    gap: 34px;
  }
}

@media (max-width: 560px) {
  .conversation-specification-page .document-lead h1 {
    font-size: 32px;
  }

  .specification-section {
    padding-top: 54px;
  }

  .specification-heading {
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 10px;
    margin-bottom: 28px;
  }

  .specification-heading > span {
    font-size: 25px;
  }

  .specification-heading h2 {
    font-size: 25px;
  }

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

  .value-chain li,
  .value-chain li:nth-child(2) {
    border-right: 0;
    border-bottom: 1px solid var(--reference-line);
  }

  .value-chain li:last-child {
    border-bottom: 0;
  }

  .relationship-map {
    margin-inline: -18px;
    padding-inline: 18px;
  }

  .object-glossary > div,
  .boundary-list > div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .capability-row {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 10px;
  }

  .capability-row h3 {
    font-size: 18px;
  }

  .specification-table-wrap {
    margin-inline: -18px;
    padding-inline: 18px;
  }
}