.page-about {
  --about-rail-w: clamp(70px, 9vw, 118px);
  --about-hair: 1px solid var(--line-soft);
  --about-goldhair: 1px solid rgba(217, 164, 65, 0.55);
  --about-white-soft: rgba(246, 241, 231, 0.72);
  background: var(--paper);
  color: var(--ink);
}

.page-about h1,
.page-about h2,
.page-about h3 {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.page-about p {
  margin: 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(18px, 3vw, 34px) 0 clamp(34px, 5vw, 62px);
  background:
    radial-gradient(120% 90% at 92% 0%, rgba(194, 24, 43, 0.13), transparent 58%),
    linear-gradient(180deg, #FBF7EF 0%, var(--paper) 100%);
  border-bottom: var(--about-hair);
}

.page-about .breadcrumb {
  margin-bottom: clamp(16px, 2.4vw, 28px);
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 40px);
}

.page-about .about-hero-copy h1 {
  font-size: clamp(30px, 6.4vw, 60px);
  line-height: 1.12;
  color: var(--ink);
  margin-top: 12px;
  max-width: 20ch;
}

.page-about .about-hero-lede {
  margin-top: clamp(14px, 2vw, 20px);
  max-width: 40ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-btn-outline {
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--ink);
}

.page-about .about-btn-outline:hover,
.page-about .about-btn-outline:focus-visible {
  border-color: var(--c-red);
  color: var(--c-red);
}

.page-about .about-hero-plate {
  position: relative;
  padding: clamp(20px, 2.8vw, 30px);
  background: linear-gradient(158deg, var(--c-moss) 0%, var(--c-night) 82%);
  color: var(--paper);
  border: var(--about-goldhair);
  box-shadow: 6px 6px 0 rgba(16, 22, 19, 0.14);
}

.page-about .about-hero-plate::before {
  content: "";
  position: absolute;
  inset: 8px;
  border: 1px solid rgba(217, 164, 65, 0.26);
  pointer-events: none;
}

.page-about .plate-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-gold);
}

.page-about .plate-num {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: clamp(42px, 7vw, 62px);
  font-weight: 700;
  line-height: 1;
  color: var(--paper);
  font-variant-numeric: tabular-nums;
}

.page-about .plate-num span {
  font-size: 0.42em;
  margin-left: 4px;
  color: var(--c-gold);
}

.page-about .plate-cap {
  margin-top: 8px;
  font-size: 13px;
  color: var(--about-white-soft);
}

.page-about .plate-list {
  margin: 20px 0 0;
  padding: 16px 0 0;
  list-style: none;
  border-top: 1px solid rgba(246, 241, 231, 0.18);
  display: grid;
  gap: 10px;
}

.page-about .plate-list li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
  color: var(--about-white-soft);
}

.page-about .plate-val {
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 700;
  color: var(--c-cyan);
  font-variant-numeric: tabular-nums;
}

/* ---------- 通用区块 ---------- */
.page-about .about-section {
  padding: clamp(40px, 6vw, 82px) 0;
  border-bottom: var(--about-hair);
}

.page-about .about-sec-head {
  max-width: 62ch;
  margin-bottom: clamp(24px, 3.4vw, 44px);
}

.page-about .about-sec-head h2 {
  font-size: clamp(24px, 4vw, 40px);
  color: var(--ink);
  margin-top: 10px;
}

.page-about .about-sec-head .about-sec-lede {
  margin-top: 14px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 44ch;
}

.page-about .about-link {
  display: inline-block;
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--c-red);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--c-gold-deep);
  border-color: currentColor;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 2.6vw, 34px);
}

.page-about .about-rail-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-rail-list li {
  flex: 0 0 auto;
}

.page-about .about-rail-link {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 8px 14px;
  border: 1px solid var(--line-strong);
  background: rgba(246, 241, 231, 0.7);
  text-decoration: none;
  color: var(--ink);
  transition: border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.page-about .about-rail-year {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
}

.page-about .about-rail-note {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ink-mute);
}

.page-about .about-rail-link:hover,
.page-about .about-rail-link:focus-visible {
  border-color: var(--c-red);
  background: var(--paper-2);
}

.page-about .about-rail-body {
  display: grid;
  gap: clamp(16px, 2.2vw, 26px);
  min-width: 0;
}

.page-about .about-chapter {
  position: relative;
  padding: clamp(18px, 2.8vw, 30px);
  background: var(--paper-2);
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow-paper);
  scroll-margin-top: calc(var(--header-h) + 20px);
  transition: box-shadow 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .about-chapter::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--c-red), var(--c-gold));
}

.page-about .about-chapter:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-paper-hover);
}

.page-about .about-chapter:target {
  background: var(--paper);
  border-color: var(--c-gold);
}

.page-about .chapter-head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 12px;
}

.page-about .chapter-year {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4.4vw, 42px);
  font-weight: 700;
  line-height: 1;
  color: var(--c-red);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.page-about .about-chapter h3 {
  font-size: clamp(17px, 2.2vw, 21px);
  color: var(--ink);
}

.page-about .about-chapter p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 44ch;
}

.page-about .chapter-points {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-about .chapter-points li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-about .chapter-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 7px;
  background: var(--c-gold);
  transform: rotate(45deg);
}

.page-about .about-figure {
  margin: 18px 0 0;
  position: relative;
  border: 1px solid var(--line-strong);
  background: var(--c-night);
  padding: 5px;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.9) contrast(1.05);
}

.page-about .about-figure figcaption,
.page-about .about-team-figure figcaption,
.page-about .about-local-figure figcaption {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  line-height: 1.6;
  color: var(--ink-mute);
  padding: 8px 4px 2px;
}

/* ---------- 数据生产 ---------- */
.page-about .about-section--data {
  background: linear-gradient(180deg, var(--paper) 0%, var(--paper-2) 100%);
}

.page-about .about-data-panel {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
  padding: clamp(20px, 3.2vw, 38px);
  background:
    repeating-linear-gradient(45deg, rgba(25, 224, 200, 0.05) 0 2px, transparent 2px 10px),
    linear-gradient(150deg, var(--c-moss) 0%, var(--c-night) 78%);
  color: var(--paper);
  border: var(--about-goldhair);
  box-shadow: 7px 7px 0 rgba(16, 22, 19, 0.16);
}

.page-about .data-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-gold);
  margin-bottom: 14px;
}

.page-about .data-source-list,
.page-about .data-step-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .data-source-list li {
  padding: 12px 14px;
  border-left: 2px solid rgba(217, 164, 65, 0.5);
  background: rgba(246, 241, 231, 0.05);
}

.page-about .data-source-list strong,
.page-about .data-step-list strong {
  display: block;
  font-size: 15px;
  color: var(--paper);
  margin-bottom: 4px;
}

.page-about .data-source-list span,
.page-about .data-step-list span:last-child {
  font-size: 13px;
  line-height: 1.7;
  color: var(--about-white-soft);
}

.page-about .data-step-list li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  column-gap: 12px;
  row-gap: 2px;
  align-items: baseline;
}

.page-about .data-step-list .step-no {
  grid-row: span 2;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--c-cyan);
}

.page-about .data-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: clamp(14px, 2.4vw, 26px);
  padding-top: clamp(16px, 2.4vw, 24px);
  border-top: 1px solid rgba(246, 241, 231, 0.18);
}

.page-about .data-foot-num {
  font-family: var(--font-mono);
  font-size: clamp(40px, 6vw, 58px);
  font-weight: 700;
  line-height: 1;
  color: var(--c-gold);
  font-variant-numeric: tabular-nums;
}

.page-about .data-foot-num span {
  font-size: 0.36em;
  margin-left: 4px;
  color: var(--paper);
}

.page-about .data-foot-text {
  flex: 1 1 260px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--about-white-soft);
}

/* ---------- 团队 ---------- */
.page-about .about-team-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 2.6vw, 32px);
}

.page-about .about-team-figure {
  margin: 0;
  padding: 5px;
  border: 1px solid var(--line-strong);
  background: var(--paper-2);
  position: relative;
}

.page-about .about-team-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: grayscale(0.35) contrast(1.06) sepia(0.12);
}

.page-about .about-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(14px, 2vw, 20px);
}

.page-about .about-filter-btn {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  padding: 8px 14px;
  border: 1px solid var(--line-strong);
  background: var(--paper-2);
  color: var(--ink-soft);
  cursor: pointer;
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .about-filter-btn[aria-pressed="true"],
.page-about .about-filter-btn:hover,
.page-about .about-filter-btn:focus-visible {
  background: var(--c-red);
  border-color: var(--c-red);
  color: var(--paper);
}

.page-about .about-team-cards {
  display: grid;
  gap: 12px;
}

.page-about .about-team-card {
  padding: 16px 18px;
  background: var(--paper);
  border: 1px solid var(--line-strong);
  border-top: 3px solid var(--c-grass);
  transition: transform 0.18s var(--ease), box-shadow 0.18s var(--ease);
}

.page-about .about-team-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-paper);
}

.page-about .about-team-card[hidden] {
  display: none;
}

.page-about .team-tag {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-gold-deep);
  margin-bottom: 6px;
}

.page-about .about-team-card h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.page-about .about-team-card p:last-child {
  font-size: 14px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-about .about-filter-empty {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--ink-mute);
}

.page-about .about-service-note {
  margin-top: clamp(20px, 3vw, 30px);
  padding: clamp(16px, 2.4vw, 24px);
  border: 1px dashed var(--line-strong);
  background: linear-gradient(90deg, rgba(217, 164, 65, 0.1), transparent 70%);
}

.page-about .about-service-note p:not(.eyebrow) {
  margin-top: 8px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 56ch;
}

/* ---------- 本地合作 ---------- */
.page-about .about-section--local {
  background:
    linear-gradient(180deg, var(--paper-2) 0%, var(--paper) 100%);
}

.page-about .about-local-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 38px);
  align-items: center;
}

.page-about .about-local-copy h2 {
  font-size: clamp(24px, 4vw, 38px);
  margin-top: 10px;
  margin-bottom: 14px;
  color: var(--ink);
}

.page-about .about-local-copy p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 44ch;
}

.page-about .about-local-copy p + p {
  margin-top: 12px;
}

.page-about .about-local-figure {
  margin: 0;
  padding: 6px;
  border: 1px solid var(--line-strong);
  background: var(--c-night);
  box-shadow: var(--shadow-paper);
}

.page-about .about-local-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-local-figure figcaption {
  color: rgba(246, 241, 231, 0.65);
}

.page-about .about-seal-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-seal {
  position: relative;
  display: grid;
  gap: 2px;
  padding: 16px 18px;
  background: var(--paper);
  border: 1px solid var(--c-red);
  box-shadow: inset 0 0 0 4px var(--paper), inset 0 0 0 5px rgba(194, 24, 43, 0.22);
  outline: none;
}

.page-about .about-seal:focus-visible {
  box-shadow: inset 0 0 0 4px var(--paper), inset 0 0 0 5px var(--c-red), 0 0 0 3px rgba(25, 224, 200, 0.5);
}

.page-about .about-seal-num {
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  color: var(--c-red);
  font-variant-numeric: tabular-nums;
}

.page-about .about-seal-name {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-seal-type {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--c-gold-deep);
}

@media (hover: hover) {
  .page-about .about-seal-type {
    opacity: 0.4;
    transition: opacity 0.18s var(--ease), color 0.18s var(--ease);
  }

  .page-about .about-seal:hover .about-seal-type,
  .page-about .about-seal:focus-within .about-seal-type,
  .page-about .about-seal:focus .about-seal-type {
    opacity: 1;
    color: var(--c-grass);
  }
}

/* ---------- 版本 ---------- */
.page-about .about-version-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 2vw, 20px);
}

.page-about .about-version-card {
  padding: clamp(18px, 2.6vw, 26px);
  background: var(--paper-2);
  border: 1px solid var(--line-strong);
  border-bottom: 3px solid var(--c-gold);
}

.page-about .about-version-card--key {
  background: linear-gradient(160deg, var(--c-red-deep) 0%, var(--c-red) 100%);
  border-color: var(--c-red-deep);
  border-bottom-color: var(--c-gold);
  color: var(--paper);
}

.page-about .version-kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

.page-about .about-version-card--key .version-kicker {
  color: rgba(246, 241, 231, 0.78);
}

.page-about .version-big {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin: 8px 0 12px;
  font-family: var(--font-mono);
  font-size: clamp(38px, 6vw, 54px);
  font-weight: 700;
  line-height: 1;
  color: var(--c-gold-deep);
  font-variant-numeric: tabular-nums;
}

.page-about .about-version-card--key .version-big {
  color: var(--c-gold);
}

.page-about .version-big span {
  font-size: 0.36em;
  color: var(--ink-mute);
}

.page-about .about-version-card--key .version-big span {
  color: rgba(246, 241, 231, 0.8);
}

.page-about .about-version-card h3 {
  font-size: 17px;
  margin-bottom: 8px;
  color: var(--ink);
}

.page-about .about-version-card--key h3 {
  color: var(--paper);
}

.page-about .about-version-card p:last-child {
  font-size: 14px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-about .about-version-card--key p:last-child {
  color: rgba(246, 241, 231, 0.86);
}

.page-about .about-sync-panel {
  padding: clamp(18px, 2.6vw, 26px);
  background: var(--c-night);
  color: var(--paper);
  border: 1px solid rgba(25, 224, 200, 0.35);
}

.page-about .about-sync-panel h3 {
  font-size: 17px;
  color: var(--paper);
  margin-bottom: 10px;
}

.page-about .about-sync-panel p {
  font-size: 14px;
  line-height: 1.78;
  color: var(--about-white-soft);
}

.page-about .about-sync-list {
  margin: 16px 0;
  padding: 14px 0;
  list-style: none;
  display: grid;
  gap: 10px;
  border-top: 1px solid rgba(246, 241, 231, 0.16);
  border-bottom: 1px solid rgba(246, 241, 231, 0.16);
}

.page-about .about-sync-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  font-size: 13px;
  color: var(--about-white-soft);
}

.page-about .sync-val {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--c-cyan);
  font-variant-numeric: tabular-nums;
  min-width: 92px;
}

.page-about .about-browser-note {
  font-size: 13px;
  line-height: 1.75;
  color: rgba(246, 241, 231, 0.62);
}

/* ---------- 价值 ---------- */
.page-about .about-section--values {
  background: linear-gradient(180deg, var(--paper) 0%, #FBF7EF 100%);
}

.page-about .about-values {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .about-value {
  border: 1px solid var(--line-strong);
  background: var(--paper-2);
  transition: border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.page-about .about-value[open] {
  background: var(--paper);
  border-color: var(--c-gold);
  box-shadow: var(--shadow-paper);
}

.page-about .about-value summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px clamp(14px, 2vw, 20px);
  cursor: pointer;
  list-style: none;
  font-weight: 700;
  font-size: 16px;
  color: var(--ink);
}

.page-about .about-value summary::-webkit-details-marker {
  display: none;
}

.page-about .about-value summary:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: -2px;
}

.page-about .about-value summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--c-red);
}

.page-about .about-value[open] summary::after {
  content: "–";
}

.page-about .value-idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--c-gold-deep);
}

.page-about .about-value p {
  padding: 0 clamp(14px, 2vw, 20px) 18px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 46ch;
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  padding: clamp(34px, 5vw, 64px) 0 clamp(40px, 6vw, 78px);
  background: linear-gradient(120deg, var(--c-moss) 0%, var(--c-night) 100%);
  color: var(--paper);
}

.page-about .about-cta-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 32px);
  align-items: center;
  padding: clamp(20px, 3vw, 34px) 0 0;
  border-top: 1px solid rgba(217, 164, 65, 0.4);
}

.page-about .about-cta .eyebrow {
  color: var(--c-gold);
}

.page-about .about-cta-copy h2 {
  font-size: clamp(24px, 4vw, 38px);
  color: var(--paper);
  margin-top: 10px;
}

.page-about .about-cta-copy p:not(.eyebrow) {
  margin-top: 12px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-white-soft);
  max-width: 44ch;
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-cta-actions .btn {
  min-width: 148px;
  text-align: center;
}

.page-about .about-cta-actions .about-btn-outline {
  border-color: rgba(246, 241, 231, 0.45);
  color: var(--paper);
}

.page-about .about-cta-actions .about-btn-outline:hover,
.page-about .about-cta-actions .about-btn-outline:focus-visible {
  border-color: var(--c-cyan);
  color: var(--c-cyan);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .about-seal-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
  }

  .page-about .about-rail-list {
    flex-direction: column;
    overflow: visible;
    gap: 0;
    padding: 4px 0 4px 26px;
    border-left: 2px solid rgba(217, 164, 65, 0.55);
  }

  .page-about .about-rail-link {
    border: none;
    background: none;
    padding: 10px 0;
    position: relative;
  }

  .page-about .about-rail-link:hover,
  .page-about .about-rail-link:focus-visible {
    background: none;
  }

  .page-about .about-rail-link::before {
    content: "";
    position: absolute;
    left: -32px;
    top: 20px;
    width: 10px;
    height: 10px;
    background: var(--paper);
    border: 2px solid var(--c-gold);
    transform: rotate(45deg);
    transition: background-color 0.18s var(--ease), border-color 0.18s var(--ease);
  }

  .page-about .about-rail-link:hover::before,
  .page-about .about-rail-link:focus-visible::before {
    background: var(--c-red);
    border-color: var(--c-red);
  }

  .page-about .about-timeline {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(24px, 3.4vw, 48px);
  }

  .page-about .about-data-panel {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(24px, 3.4vw, 44px);
  }

  .page-about .data-foot {
    grid-column: 1 / -1;
  }

  .page-about .about-team-layout {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(24px, 3vw, 40px);
    align-items: start;
  }

  .page-about .about-team-figure {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-about .about-team-cards {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .about-local-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  }

  .page-about .about-version-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(16px, 2.2vw, 24px);
  }

  .page-about .about-sync-panel {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    column-gap: clamp(20px, 3vw, 40px);
    align-items: start;
  }

  .page-about .about-sync-panel h3,
  .page-about .about-sync-panel p {
    grid-column: 1;
  }

  .page-about .about-sync-list {
    grid-column: 2;
    grid-row: 1 / span 3;
    margin: 0;
    padding: 0 0 0 clamp(16px, 2vw, 26px);
    border-top: none;
    border-bottom: none;
    border-left: 1px solid rgba(246, 241, 231, 0.16);
  }

  .page-about .about-sync-panel .about-browser-note {
    grid-column: 1;
  }

  .page-about .about-cta-inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    justify-items: start;
  }

  .page-about .about-cta-actions {
    justify-self: end;
  }
}

@media (min-width: 1180px) {
  .page-about .about-team-cards {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .about-values {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-chapter,
  .page-about .about-team-card,
  .page-about .about-rail-link,
  .page-about .about-seal-type {
    transition: none;
  }

  .page-about .about-chapter:hover,
  .page-about .about-team-card:hover {
    transform: none;
  }
}
<<<END>>>