.page-about {
  --page-gutter: clamp(1.25rem, 4vw, 3.5rem);
  background: var(--bg);
  color: var(--text);
  padding-top: clamp(1.5rem, 4vw, 3rem);
}

.page-about .crumb {
  margin: 0 0 2.5rem;
}

.page-about .crumb [aria-current="page"] {
  color: var(--text-gray);
}

.page-about .page-head {
  position: relative;
  padding: 2.5rem 0 3rem;
  border-bottom: 1px solid var(--line);
}

.page-about .page-head::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: clamp(2.5rem, 6vw, 5rem);
  height: 4px;
  background: var(--green);
  clip-path: polygon(0 0, 100% 0, 86% 100%, 0 100%);
}

.page-about .page-head__index {
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--text-dim);
  text-transform: uppercase;
  margin: 0 0 1.25rem;
}

.page-about .site-title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 200;
  font-size: clamp(3rem, 6vw, 6rem);
  line-height: 0.95;
  letter-spacing: 0.01em;
}

.page-about .site-title__accent {
  color: var(--green);
}

.page-about .page-head__desc {
  margin: 1.5rem 0 0;
  max-width: 38em;
  color: var(--text-gray);
  line-height: 1.85;
  font-size: 1rem;
}

.page-about .page-head__desc a {
  color: var(--green);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--ease);
}

.page-about .page-head__desc a:hover {
  border-color: var(--green);
}

.page-about .archive-layout {
  display: grid;
  gap: 2.5rem;
  padding: 2.5rem 0 3rem;
}

.page-about .archive-nav {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  scrollbar-width: none;
  padding-bottom: 0.25rem;
}

.page-about .archive-nav::-webkit-scrollbar {
  display: none;
}

.page-about .archive-nav__label {
  display: none;
}

.page-about .archive-nav__item {
  font-family: var(--font-data);
  font-size: 0.8125rem;
  color: var(--text-gray);
  text-decoration: none;
  white-space: nowrap;
  padding: 0.55rem 0.95rem;
  background: var(--capsule);
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  transition: color var(--ease), border-color var(--ease), background-color var(--ease);
}

.page-about .archive-nav__item:hover,
.page-about .archive-nav__item:focus-visible {
  color: var(--green);
  border-color: var(--green);
}

.page-about .archive-nav__num {
  margin-right: 0.45em;
  color: var(--green);
  font-size: 0.7rem;
}

.page-about .section {
  padding: 3.5rem 0;
  border-top: 1px solid var(--line);
}

.page-about .section:first-child {
  border-top: 0;
  padding-top: 1rem;
}

.page-about .section__head {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 2rem;
}

.page-about .section__index {
  font-family: var(--font-data);
  font-size: 0.8125rem;
  color: var(--green);
  border: 1px solid var(--line);
  background: var(--surface);
  padding: 0.35rem 0.55rem;
  border-radius: var(--r-sm);
  flex: 0 0 auto;
}

.page-about .section__heading-text {
  flex: 1;
}

.page-about .section__title {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  letter-spacing: 0.01em;
  margin: 0;
}

.page-about .section__subtitle {
  margin: 0.4rem 0 0;
  color: var(--text-dim);
  font-size: 0.875rem;
  line-height: 1.6;
}

.page-about .manifesto__grid {
  display: grid;
  gap: 2rem;
  align-items: center;
}

.page-about .manifesto__text p {
  margin: 0 0 1.1rem;
  color: var(--text-gray);
  line-height: 1.9;
}

.page-about .manifesto__lead {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.65;
  letter-spacing: 0.01em;
}

.page-about .manifesto__promise {
  margin-top: 1.5rem;
  padding: 1rem 1.25rem;
  background: var(--green-soft);
  border-left: 3px solid var(--green);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  color: var(--text) !important;
  font-weight: 600;
}

.page-about .brand-cover,
.page-about .timeline-visual,
.page-about .scale-visual {
  margin: 0;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  overflow: hidden;
  background: var(--surface);
}

.page-about .brand-cover img,
.page-about .timeline-visual img,
.page-about .scale-visual img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

.page-about .brand-cover figcaption,
.page-about .timeline-visual figcaption,
.page-about .scale-visual figcaption {
  padding: 0.75rem 1rem;
  font-family: var(--font-data);
  font-size: 0.75rem;
  color: var(--text-dim);
  background: var(--surface);
}

.page-about .timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .timeline__list::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: var(--line);
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 2.2rem 2.75rem;
}

.page-about .timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--green);
  box-shadow: 0 0 0 4px var(--green-soft);
}

.page-about .timeline__details summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
}

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

.page-about .timeline__details summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-data);
  color: var(--text-dim);
  font-size: 1.1rem;
  transition: color var(--ease), transform var(--ease);
}

.page-about .timeline__details[open] summary::after {
  content: "–";
  color: var(--green);
}

.page-about .timeline__year {
  font-family: var(--font-data);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  color: var(--green);
  line-height: 1;
}

.page-about .timeline__title {
  font-family: var(--font-head);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.02em;
}

.page-about .timeline__details[open] .timeline__title {
  color: var(--green);
}

.page-about .timeline__detail {
  margin-top: 0.8rem;
  max-width: 42em;
}

.page-about .timeline__detail p {
  margin: 0;
  color: var(--text-gray);
  font-size: 0.9375rem;
  line-height: 1.8;
}

.page-about .timeline-visual {
  margin: 3rem 0 0;
}

.page-about .trust__grid {
  display: grid;
  gap: 1rem;
}

.page-about .trust__panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 1.75rem 1.5rem;
  transition: border-color var(--ease);
}

.page-about .trust__panel:hover {
  border-color: var(--green);
}

.page-about .trust__panel-label {
  font-family: var(--font-data);
  font-size: 0.75rem;
  color: var(--green);
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 0.75rem;
}

.page-about .trust__panel .panel__title {
  font-family: var(--font-head);
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--text);
}

.page-about .trust__panel .panel__body {
  margin: 0;
  color: var(--text-gray);
  line-height: 1.75;
  font-size: 0.9375rem;
}

.page-about .trust__capabilities {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
  padding: 2rem 1.5rem;
  background: var(--bg);
  border: 1px dashed var(--line);
  border-radius: var(--r-lg);
}

.page-about .trust__capability {
  padding: 1.25rem;
  background: var(--surface);
  border-radius: var(--r-md);
}

.page-about .trust__cap-icon {
  font-family: var(--font-data);
  color: var(--green);
  font-size: 1.5rem;
  display: block;
  margin-bottom: 0.5rem;
}

.page-about .trust__capability h4 {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 0.4rem;
  color: var(--text);
}

.page-about .trust__capability p {
  margin: 0 0 0.85rem;
  color: var(--text-gray);
  font-size: 0.875rem;
  line-height: 1.7;
}

.page-about .trust__capability .tag {
  margin-top: 0;
}

.page-about .trust__note {
  margin: 1.5rem 0 0;
  color: var(--text-dim);
  font-size: 0.8125rem;
  text-align: right;
}

.page-about .trust__note a {
  color: var(--green);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--ease);
}

.page-about .trust__note a:hover {
  border-color: var(--green);
}

.page-about .scale-visual {
  margin: 0 0 2rem;
}

.page-about .scale__stats {
  display: grid;
  gap: 1rem;
}

.page-about .scale__stat {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 1.5rem 1.25rem;
  transition: border-color var(--ease);
}

.page-about .scale__stat:hover {
  border-color: var(--green);
}

.page-about .scale__num {
  display: block;
  font-family: var(--font-data);
  font-weight: 300;
  font-size: clamp(3rem, 8vw, 5rem);
  line-height: 1;
  color: var(--text);
  letter-spacing: -0.03em;
}

.page-about .scale__stat--hero .scale__num {
  font-size: clamp(4rem, 12vw, 7rem);
}

.page-about .scale__num-suffix {
  color: var(--green);
}

.page-about .scale__label {
  display: block;
  margin-top: 0.75rem;
  color: var(--text-gray);
  font-size: 0.875rem;
}

.page-about .scale__leagues {
  margin-top: 2rem;
  padding: 1.75rem 1.5rem;
  background: var(--capsule);
  border-radius: var(--r-lg);
}

.page-about .scale__leagues h3 {
  margin: 0 0 1rem;
  font-family: var(--font-head);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text);
}

.page-about .scale__league-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.page-about .scale__league-list li {
  font-size: 0.8125rem;
  color: var(--text-gray);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  padding: 0.4rem 0.8rem;
  transition: color var(--ease), border-color var(--ease);
}

.page-about .scale__league-list li:hover {
  color: var(--green);
  border-color: var(--green);
}

.page-about .scale__footnote {
  margin: 1.25rem 0 0;
  color: var(--text-dim);
  font-size: 0.8125rem;
}

.page-about .certificate__grid {
  display: grid;
  gap: 1.5rem;
}

.page-about .certificate__badge {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 2rem 1.75rem;
  text-align: center;
  transition: border-color var(--ease), box-shadow var(--ease);
  outline: none;
}

.page-about .certificate__badge:hover,
.page-about .certificate__badge:focus-visible {
  border-color: var(--green);
  box-shadow: 0 0 0 4px var(--green-soft);
}

.page-about .certificate__shield {
  width: 92px;
  height: auto;
  display: block;
  margin: 0 auto 1.25rem;
}

.page-about .certificate__shield-outer {
  fill: var(--green-soft);
  stroke: var(--green);
  stroke-width: 2;
}

.page-about .certificate__shield-inner {
  fill: rgba(0, 255, 136, 0.06);
  stroke: var(--green);
  stroke-width: 1.2;
}

.page-about .certificate__shield text {
  font-family: var(--font-data);
  fill: var(--green);
}

.page-about .certificate__badge-title {
  font-family: var(--font-head);
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0 0 0.75rem;
  color: var(--text);
}

.page-about .certificate__badge-desc {
  margin: 0;
  color: var(--text-gray);
  font-size: 0.875rem;
  line-height: 1.7;
}

.page-about .certificate__link {
  display: inline-block;
  margin-top: 1rem;
  color: var(--green);
  text-decoration: none;
  font-size: 0.875rem;
  border-bottom: 1px solid transparent;
  transition: border-color var(--ease);
}

.page-about .certificate__link:hover {
  border-color: var(--green);
}

.page-about .certificate__org {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 2rem 1.75rem;
}

.page-about .certificate__org h3 {
  font-family: var(--font-head);
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0 0 1rem;
  color: var(--text);
}

.page-about .certificate__org > p:first-of-type {
  margin: 0 0 1.25rem;
  color: var(--text-gray);
  line-height: 1.85;
  font-size: 0.9375rem;
}

.page-about .certificate__org-list {
  list-style: none;
  margin: 0 0 1.25rem;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .certificate__org-list li {
  position: relative;
  padding: 0.85rem 0 0.85rem 1.75rem;
  border-bottom: 1px solid var(--line);
  color: var(--text-gray);
  font-size: 0.875rem;
  line-height: 1.7;
}

.page-about .certificate__org-list li::before {
  content: "●";
  position: absolute;
  left: 0;
  top: 0.9rem;
  font-size: 0.5rem;
  color: var(--green);
}

.page-about .certificate__org-note {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.8125rem;
}

.page-about .certificate__org-note a {
  color: var(--green);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--ease);
}

.page-about .certificate__org-note a:hover {
  border-color: var(--green);
}

.page-about .archive-cta {
  margin-top: 2rem;
  padding: 2.5rem 1.75rem;
  background: var(--green-soft);
  border: 1px solid var(--green);
  border-radius: var(--r-lg);
  position: relative;
  overflow: hidden;
}

.page-about .archive-cta__index {
  font-family: var(--font-data);
  font-size: 0.75rem;
  color: var(--green);
  letter-spacing: 0.14em;
  margin: 0 0 0.75rem;
}

.page-about .archive-cta h2 {
  font-family: var(--font-head);
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 600;
  margin: 0 0 0.75rem;
  color: var(--text);
}

.page-about .archive-cta p {
  margin: 0;
  color: var(--text-gray);
  line-height: 1.8;
  font-size: 0.9375rem;
}

.page-about .archive-cta a {
  color: var(--green);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--ease);
}

.page-about .archive-cta a:hover {
  border-color: var(--green);
}

@media (min-width: 700px) {
  .page-about .trust__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .trust__capabilities {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .page-about .certificate__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  }
}

@media (min-width: 900px) {
  .page-about .archive-layout {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 4rem;
  }

  .page-about .archive-nav {
    position: sticky;
    top: 2rem;
    flex-direction: column;
    gap: 0.25rem;
    align-self: start;
    overflow: visible;
    padding: 1.5rem 1.25rem;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--r-lg);
  }

  .page-about .archive-nav__label {
    display: block;
    font-family: var(--font-data);
    font-size: 0.7rem;
    color: var(--text-dim);
    letter-spacing: 0.14em;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--line);
  }

  .page-about .archive-nav__item {
    background: transparent;
    border-radius: 0;
    padding: 0.7rem 0.25rem;
    border-bottom: 1px solid transparent;
  }

  .page-about .archive-nav__item:hover,
  .page-about .archive-nav__item:focus-visible {
    background: var(--bg);
  }

  .page-about .manifesto__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 3.5rem;
  }
}