.page-about {
  overflow-x: hidden;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--base-size);
  line-height: 1.9;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about .about-cover {
  position: relative;
  overflow: hidden;
  padding: 48px 0 42px;
  color: var(--paper);
  background:
    radial-gradient(circle at 82% 16%, rgba(199, 155, 66, 0.22), transparent 28%),
    linear-gradient(135deg, var(--brown), #261711);
}

.page-about .about-cover::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--gold) 0%, rgba(199, 155, 66, 0.3) 60%, transparent 100%);
}

.page-about .cover-layout {
  display: grid;
  gap: 34px;
  margin-top: 34px;
}

.page-about .cover-file {
  margin: 0 0 14px;
  color: rgba(244, 236, 221, 0.66);
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.page-about .cover-title {
  margin: 0;
  font-family: var(--font-head);
  font-size: 38px;
  line-height: 1.3;
  color: #FFFBF2;
  letter-spacing: 0.02em;
}

.page-about .cover-copy .page-subtitle {
  margin-top: 18px;
  color: rgba(244, 236, 221, 0.88);
  font-size: 17px;
}

.page-about .cover-desc {
  margin-top: 18px;
  max-width: 600px;
  color: rgba(244, 236, 221, 0.72);
  font-size: 15px;
}

.page-about .cover-side {
  display: flex;
  align-items: center;
  gap: 22px;
}

.page-about .cover-vert {
  color: var(--gold);
  font-family: var(--font-head);
  font-size: 16px;
  letter-spacing: 0.22em;
  opacity: 0.9;
}

.page-about .cover-stamp {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border: 2px solid rgba(199, 155, 66, 0.7);
  border-radius: var(--radius-md);
  padding: 12px 18px;
  background: rgba(244, 236, 221, 0.05);
}

.page-about .stamp-char {
  font-family: var(--font-head);
  font-size: 42px;
  line-height: 1;
  color: var(--gold);
}

.page-about .stamp-sub {
  writing-mode: vertical-rl;
  color: rgba(244, 236, 221, 0.86);
  font-size: 14px;
  letter-spacing: 0.3em;
}

.page-about .page-index {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 46px;
  padding-bottom: 6px;
}

.page-about .index-link {
  display: inline-block;
  border: 1px solid rgba(244, 236, 221, 0.3);
  border-radius: var(--radius-pill);
  padding: 7px 17px;
  color: var(--paper);
  font-size: 14px;
  text-decoration: none;
  transition: background-color var(--duration) var(--ease), border-color var(--duration) var(--ease), color var(--duration) var(--ease), transform var(--duration) var(--ease);
}

.page-about .index-link:hover,
.page-about .index-link[data-active] {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--brown);
  transform: translateY(-2px);
}

.page-about .about-cover .breadcrumb {
  margin: 0;
  padding: 0;
}

.page-about .about-cover .breadcrumb a,
.page-about .about-cover .breadcrumb span {
  color: rgba(244, 236, 221, 0.78);
}

.page-about .about-section {
  padding: 64px 0;
}

.page-about .section-head {
  position: relative;
  margin-bottom: 26px;
}

.page-about .section-kicker {
  color: var(--gold);
  font-family: var(--font-head);
  font-size: 18px;
  letter-spacing: 0.12em;
  margin-right: 12px;
}

.page-about .section-title {
  display: inline-block;
  margin: 0;
  padding-bottom: 6px;
  border-bottom: 2px solid var(--gold);
  font-family: var(--font-head);
  font-size: 30px;
  line-height: 1.35;
  color: var(--brown);
  letter-spacing: 0.03em;
}

.page-about .section-note {
  margin: 12px 0 0;
  color: var(--olive);
  font-size: 15px;
}

.page-about .lead {
  max-width: 720px;
  margin: 0 0 16px;
  font-size: 17px;
  color: var(--ink);
}

.page-about .origin-copy .dropcap::first-letter {
  float: left;
  margin: 8px 12px 0 0;
  font-family: var(--font-head);
  font-size: 3.2em;
  line-height: 0.9;
  color: var(--brown);
  font-weight: 600;
}

.page-about .origin-layout {
  display: grid;
  gap: 34px;
  align-items: start;
}

.page-about .origin-figure {
  margin: 0;
}

.page-about .origin-figure img {
  display: block;
  width: 100%;
  max-width: 300px;
  border-radius: var(--radius-lg) var(--radius-lg) var(--radius-lg) 6px;
  object-fit: cover;
}

.page-about .origin-figure figcaption {
  margin-top: 10px;
  color: var(--olive);
  font-size: 13px;
  letter-spacing: 0.06em;
}

.page-about .origin-meta {
  margin-top: 24px;
  color: var(--olive);
  font-size: 15px;
}

.page-about .origin-meta a {
  color: var(--green);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.page-about .timeline-section {
  position: relative;
  background: linear-gradient(180deg, rgba(31, 58, 44, 0.08), transparent 46%);
}

.page-about .timeline-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.page-about .timeline-bg img {
  position: absolute;
  right: -50px;
  top: 0;
  width: 92%;
  max-width: 820px;
  opacity: 0.16;
  object-fit: cover;
}

.page-about .timeline-canvas {
  position: relative;
  max-width: 860px;
  margin: 34px auto 0;
  padding: 8px 0;
}

.page-about .timeline-curve {
  position: absolute;
  left: 14px;
  top: 0;
  width: 70px;
  height: 100%;
  pointer-events: none;
}

.page-about .timeline-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 32px;
}

.page-about .timeline-item {
  position: relative;
  padding-left: 82px;
}

.page-about .timeline-item::before {
  content: "";
  position: absolute;
  left: 54px;
  top: 12px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 7px var(--gold-soft);
}

.page-about .timeline-year {
  display: inline-block;
  margin-bottom: 6px;
  padding-bottom: 2px;
  border-bottom: 2px solid var(--gold);
  font-family: var(--font-head);
  font-size: 24px;
  line-height: 1.3;
  color: var(--brown);
}

.page-about .timeline-item h3 {
  margin: 0 0 4px;
  font-family: var(--font-head);
  font-size: 19px;
  color: var(--ink);
}

.page-about .timeline-item p {
  margin: 0;
  max-width: 580px;
  font-size: 15px;
  color: var(--olive);
  line-height: 1.7;
}

.page-about .timeline-close {
  margin: 44px 0 0;
  text-align: right;
  font-family: var(--font-head);
  font-size: 17px;
  color: var(--brown);
}

.page-about .timeline-close a {
  color: var(--green);
  text-underline-offset: 4px;
}

.page-about .credentials-section {
  background: rgba(31, 58, 44, 0.05);
}

.page-about .credential-layout {
  display: grid;
  gap: 40px;
  align-items: start;
}

.page-about .credential-copy p {
  font-size: 15px;
  color: var(--olive);
}

.page-about .credential-tags {
  display: grid;
  gap: 12px;
  padding: 12px 0;
}

.page-about .credential-item {
  position: relative;
  background: var(--green);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  color: var(--paper);
}

.page-about .credential-item:nth-child(2) {
  transform: translateX(10px);
}

.page-about .credential-item:nth-child(3) {
  transform: translateX(20px);
}

.page-about .credential-item summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  font-family: var(--font-head);
  font-size: 17px;
  letter-spacing: 0.04em;
}

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

.page-about .credential-item summary::after {
  content: "+";
  flex: 0 0 auto;
  color: var(--gold);
  font-size: 20px;
  line-height: 1;
  transition: transform var(--duration) var(--ease);
}

.page-about .credential-item[open] summary::after {
  transform: rotate(45deg);
}

.page-about .credential-detail {
  margin: 0;
  padding: 0 22px 18px 24px;
  color: rgba(244, 236, 221, 0.84);
  font-size: 15px;
  line-height: 1.6;
}

.page-about .team-lead {
  max-width: 760px;
}

.page-about .team-rows {
  display: grid;
  gap: 18px;
  margin: 34px 0 0;
}

.page-about .team-row {
  display: grid;
  gap: 6px;
  padding: 20px 24px;
  background: var(--ivory);
  border-left: 4px solid var(--gold);
  border-radius: var(--radius-md);
}

.page-about .team-row dt {
  font-family: var(--font-head);
  font-size: 19px;
  color: var(--brown);
}

.page-about .team-row dd {
  margin: 0;
  font-size: 15px;
  color: var(--olive);
  line-height: 1.75;
}

.page-about .team-note {
  margin-top: 26px;
  font-size: 15px;
  color: var(--olive);
}

.page-about .team-note a {
  color: var(--green);
  text-underline-offset: 4px;
}

.page-about .ecosystem-section {
  padding-top: 0;
}

.page-about .ecosystem-panel {
  position: relative;
  overflow: hidden;
  display: grid;
  gap: 30px;
  padding: 42px 26px;
  background: var(--green);
  border-radius: var(--radius-lg);
  color: var(--paper);
}

.page-about .ecosystem-panel::before {
  content: "";
  position: absolute;
  inset: 12px;
  border: 1px solid rgba(244, 236, 221, 0.14);
  border-radius: calc(var(--radius-lg) - 8px);
  pointer-events: none;
}

.page-about .ecosystem-copy {
  position: relative;
  z-index: 1;
}

.page-about .ecosystem-copy .section-title {
  color: var(--paper);
  border-bottom-color: var(--gold);
}

.page-about .ecosystem-copy .section-kicker {
  color: var(--gold);
}

.page-about .ecosystem-copy p {
  max-width: 640px;
  color: rgba(244, 236, 221, 0.84);
  font-size: 15px;
}

.page-about .ecosystem-nums {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.page-about .ecosystem-nums span {
  border-radius: var(--radius-pill);
  padding: 8px 16px;
  background: rgba(244, 236, 221, 0.12);
  font-size: 15px;
}

.page-about .ecosystem-nums strong {
  margin-right: 6px;
  font-family: var(--font-head);
  font-size: 22px;
  color: var(--gold);
}

.page-about .ecosystem-figure {
  position: relative;
  z-index: 1;
  margin: 0;
  align-self: center;
}

.page-about .ecosystem-figure img {
  display: block;
  width: 100%;
  max-width: 360px;
  border-radius: var(--radius-md);
  object-fit: cover;
}

.page-about .ecosystem-figure figcaption {
  margin-top: 10px;
  color: rgba(244, 236, 221, 0.6);
  font-size: 13px;
}

.page-about .archive-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: flex-start;
  margin-top: 28px;
}

.page-about .archive-link {
  display: inline-block;
  border: 1px solid var(--green);
  border-radius: var(--radius-pill);
  padding: 8px 18px;
  color: var(--green);
  font-size: 15px;
  text-decoration: none;
  transition: background-color var(--duration) var(--ease), color var(--duration) var(--ease), transform var(--duration) var(--ease);
}

.page-about .archive-link:hover {
  background: var(--green);
  color: var(--paper);
  transform: translateY(-2px);
}

@media (min-width: 640px) {
  .page-about .about-cover {
    padding: 64px 0 52px;
  }

  .page-about .cover-title {
    font-size: 48px;
  }

  .page-about .cover-copy .page-subtitle {
    font-size: 18px;
  }

  .page-about .cover-side {
    justify-content: flex-start;
  }

  .page-about .page-index {
    gap: 12px;
  }

  .page-about .index-link {
    padding: 8px 20px;
    font-size: 15px;
  }

  .page-about .about-section {
    padding: 88px 0;
  }

  .page-about .section-title {
    font-size: 34px;
  }

  .page-about .origin-layout {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 48px;
  }

  .page-about .team-rows {
    max-width: 900px;
  }

  .page-about .team-row {
    grid-template-columns: 140px minmax(0, 1fr);
    gap: 30px;
    align-items: baseline;
  }

  .page-about .ecosystem-panel {
    padding: 48px 36px;
  }
}

@media (min-width: 960px) {
  .page-about .cover-layout {
    grid-template-columns: minmax(0, 1fr) 220px;
    gap: 40px;
  }

  .page-about .cover-side {
    justify-content: flex-end;
    align-items: flex-start;
  }

  .page-about .credential-layout {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 64px;
  }

  .page-about .credential-tags {
    padding: 12px 0 12px 40px;
  }

  .page-about .ecosystem-panel {
    grid-template-columns: minmax(0, 1fr) 340px;
    align-items: center;
    padding: 56px 48px;
  }

  .page-about .archive-links {
    justify-content: flex-end;
  }
}