.page-about {
  --about-line: rgba(14, 30, 28, 0.065);
  position: relative;
  background-color: var(--porcelain);
  background-image:
    linear-gradient(var(--about-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--about-line) 1px, transparent 1px);
  background-size: 44px 44px;
  color: var(--ink);
  overflow: hidden;
}

.page-about .about-breadcrumb {
  padding-top: 1rem;
  position: relative;
  z-index: 2;
}

.page-about .about-hero {
  padding: clamp(2.5rem, 8vw, 5.5rem) 0 clamp(2rem, 5vw, 4rem);
  position: relative;
}

.page-about .about-hero__inner {
  display: grid;
  gap: 2rem;
}

.page-about .about-hero__eyebrow {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--teal);
  margin: 0 0 1.25rem;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 7vw, 4.2rem);
  line-height: 0.98;
  letter-spacing: 0.01em;
  margin: 0 0 1.25rem;
  color: var(--ink);
  max-width: 13em;
}

.page-about .about-hero__lead {
  font-size: 1.05rem;
  line-height: 1.78;
  color: var(--teal);
  max-width: 38em;
  margin: 0;
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.page-about .about-hero__meta span {
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 0.5rem 0.9rem;
  border: 1px solid rgba(14, 30, 28, 0.2);
  border-radius: 999px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.45);
}

.page-about .about-hero__visual {
  position: relative;
  padding: 1.25rem 0 0;
}

.page-about .about-hero__corner {
  position: absolute;
  width: 44px;
  height: 44px;
  pointer-events: none;
  z-index: 2;
}

.page-about .about-hero__corner--tl {
  top: 0;
  left: 0;
  border-top: 2px solid var(--kiwi);
  border-left: 2px solid var(--kiwi);
}

.page-about .about-hero__corner--br {
  bottom: 0;
  right: 0;
  border-bottom: 2px solid var(--kiwi);
  border-right: 2px solid var(--kiwi);
}

.page-about .about-hero__frame {
  margin: 0;
  position: relative;
}

.page-about .about-hero__frame img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-l);
  display: block;
  border: 1px solid rgba(14, 30, 28, 0.16);
  background: linear-gradient(135deg, var(--mist), var(--porcelain));
}

.page-about .about-hero__frame figcaption {
  margin-top: 0.75rem;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--warm);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
    gap: 3rem;
  }

  .page-about .about-hero__visual {
    padding: 0;
  }
}

@media (min-width: 1024px) {
  .page-about {
    background-attachment: fixed;
  }
}

.page-about .about-chapter {
  padding: clamp(3.5rem, 10vw, 7rem) 0;
  position: relative;
}

.page-about .about-chapter__head {
  display: grid;
  gap: 0.75rem 1.25rem;
  margin-bottom: clamp(2rem, 5vw, 3.25rem);
  position: relative;
}

.page-about .about-chapter__num {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.12em;
  color: var(--orange);
  background: var(--ink);
  border-radius: 999px;
  padding: 0.35rem 0.8rem;
  width: fit-content;
}

.page-about .about-chapter__kicker {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--teal);
  margin: 0 0 0.3rem;
}

.page-about .about-chapter__head h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.8vw, 3.4rem);
  line-height: 1;
  letter-spacing: 0.01em;
  margin: 0;
}

.page-about .about-chapter__lead {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--warm);
  max-width: 42em;
  margin: 0.25rem 0 0;
}

@media (min-width: 768px) {
  .page-about .about-chapter__head {
    grid-template-columns: auto 1fr;
    align-items: end;
  }

  .page-about .about-chapter__lead {
    grid-column: 2;
  }
}

.page-about .about-chapter--evolution {
  background: var(--teal);
  color: var(--porcelain);
}

.page-about .about-chapter--evolution .about-chapter__head h2 {
  color: var(--porcelain);
}

.page-about .about-chapter--evolution .about-chapter__kicker {
  color: var(--kiwi);
}

.page-about .about-chapter--evolution .about-chapter__lead,
.page-about .about-chapter--recognition .about-chapter__lead {
  color: rgba(247, 244, 233, 0.74);
}

.page-about .about-chapter--evolution .about-chapter__num,
.page-about .about-chapter--recognition .about-chapter__num {
  background: var(--kiwi);
  color: var(--ink);
}

.page-about .about-file-card {
  background: rgba(255, 255, 255, 0.66);
  border: 1px solid rgba(14, 30, 28, 0.16);
  border-radius: var(--radius-l);
  box-shadow: 0 28px 80px rgba(14, 30, 28, 0.08);
  padding: clamp(1.25rem, 4vw, 2.5rem);
}

.page-about .about-file-card__grid {
  display: grid;
  gap: 2rem;
}

@media (min-width: 860px) {
  .page-about .about-file-card__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    align-items: start;
  }
}

.page-about .about-file-table {
  margin: 0;
}

.page-about .about-file-table__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.2rem;
  padding: 0.85rem 0;
  border-bottom: 1px dashed var(--mist);
}

.page-about .about-file-table__row:last-child {
  border-bottom: 0;
}

.page-about .about-file-table__row dt {
  font-size: 13px;
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  color: var(--warm);
}

.page-about .about-file-table__row dd {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.5;
}

@media (min-width: 640px) {
  .page-about .about-file-table__row {
    grid-template-columns: 140px 1fr;
    gap: 1.5rem;
    align-items: baseline;
  }
}

.page-about .about-file-card__note {
  font-size: 0.98rem;
  line-height: 1.7;
  color: var(--teal);
  background: rgba(221, 230, 222, 0.55);
  border-radius: var(--radius-m);
  padding: 1rem 1.25rem;
  margin: 0 0 1.25rem;
}

.page-about .about-stat-group {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.8rem;
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  background: var(--ink);
  color: var(--porcelain);
  border-radius: var(--radius-m);
  padding: 1rem 1.1rem;
}

.page-about .about-stat b {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--kiwi);
}

.page-about .about-stat small {
  font-size: 12px;
  margin-top: 0.5rem;
  color: rgba(247, 244, 233, 0.76);
}

.page-about .about-evolution-track {
  display: grid;
  gap: 1rem;
  grid-auto-flow: column;
  grid-auto-columns: minmax(260px, 86%);
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  scroll-snap-type: inline mandatory;
  scrollbar-width: thin;
  padding-bottom: 0.25rem;
}

@media (min-width: 900px) {
  .page-about .about-evolution-track {
    grid-auto-flow: column;
    grid-auto-columns: 1fr;
    overflow: visible;
    gap: 1.5rem;
  }
}

.page-about .about-version {
  scroll-snap-align: start;
  background: rgba(14, 30, 28, 0.24);
  border: 1px solid rgba(247, 244, 233, 0.2);
  border-radius: var(--radius-l);
  padding: 1.75rem;
  min-height: 100%;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.page-about .about-version__n {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 5.5rem);
  color: transparent;
  -webkit-text-stroke: 1px rgba(201, 180, 88, 0.9);
  line-height: 1;
  letter-spacing: 0.04em;
}

.page-about .about-version__year {
  color: var(--kiwi);
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin: 1rem 0 0.5rem;
}

.page-about .about-version h3 {
  font-size: 1.3rem;
  line-height: 1.3;
  margin: 0 0 0.75rem;
  color: var(--porcelain);
}

.page-about .about-version p {
  font-size: 0.93rem;
  line-height: 1.72;
  color: rgba(247, 244, 233, 0.72);
  margin: 0 0 1rem;
}

.page-about .about-version .tag {
  margin-top: auto;
}

.page-about .about-evolution__more {
  margin-top: 2rem;
  display: flex;
  justify-content: flex-start;
}

.page-about .about-matrix {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 760px) {
  .page-about .about-matrix {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }
}

.page-about .about-matrix__cross {
  display: none;
}

@media (min-width: 760px) {
  .page-about .about-matrix__cross {
    display: block;
    position: absolute;
    top: 50%;
    left: 50%;
    width: 12%;
    height: 2px;
    background: var(--orange);
    transform: translate(-50%, -50%);
    border-radius: 999px;
    z-index: 2;
  }
}

.page-about .about-matrix-card {
  position: relative;
  background: rgba(255, 255, 255, 0.76);
  border: 1px solid rgba(14, 30, 28, 0.12);
  border-radius: var(--radius-l);
  padding: 1.75rem;
  box-shadow: 0 20px 50px rgba(14, 30, 28, 0.07);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about .about-matrix-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 28px 70px rgba(14, 30, 28, 0.12);
}

.page-about .about-matrix-card__index {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--kiwi);
  letter-spacing: 0.1em;
  background: var(--ink);
  border-radius: 999px;
  padding: 0.3rem 0.7rem;
  position: absolute;
  top: -10px;
  right: 18px;
}

.page-about .about-matrix-card h3 {
  font-size: 1.22rem;
  line-height: 1.3;
  margin: 0.75rem 0 0.6rem;
}

.page-about .about-matrix-card p {
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--warm);
  margin: 0 0 1rem;
}

.page-about .about-matrix-card__rel {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--orange);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-top: 1px dashed var(--mist);
  padding-top: 0.8rem;
  display: block;
}

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

.page-about .about-map-figure {
  position: relative;
  margin: 2.5rem 0 0;
  border-radius: var(--radius-l);
  overflow: hidden;
  border: 1px solid rgba(14, 30, 28, 0.14);
  background: var(--mist);
}

.page-about .about-map-figure img {
  width: 100%;
  height: auto;
  display: block;
  opacity: 0.55;
}

.page-about .about-map-dot {
  position: absolute;
  display: flex;
  flex-direction: column;
  background: rgba(15, 76, 92, 0.92);
  color: var(--porcelain);
  border-radius: 999px;
  padding: 0.45rem 0.8rem;
  font-size: 12px;
  font-weight: 700;
  box-shadow: 0 8px 22px rgba(15, 76, 92, 0.35);
  transition: transform 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .about-map-dot small {
  font-weight: 400;
  font-size: 11px;
  color: rgba(247, 244, 233, 0.76);
}

.page-about .about-map-dot:hover {
  transform: scale(1.08);
  background: var(--orange);
}

.page-about .about-map-dot--cs {
  top: 20%;
  left: 18%;
}

.page-about .about-map-dot--c1 {
  top: 44%;
  left: 48%;
}

.page-about .about-map-dot--c2 {
  top: 70%;
  left: 34%;
}

.page-about .about-map-dot--fa {
  top: 28%;
  right: 20%;
}

.page-about .about-map-dot--sc {
  bottom: 16%;
  left: 64%;
}

.page-about .about-chapter__links {
  margin-top: 2rem;
}

.page-about .about-chapter--recognition {
  background: var(--wine);
  color: var(--porcelain);
}

.page-about .about-chapter--recognition .about-chapter__head h2 {
  color: var(--porcelain);
}

.page-about .about-chapter--recognition .about-chapter__kicker {
  color: var(--kiwi);
}

.page-about .about-recognition-grid {
  display: grid;
  gap: 2rem;
}

@media (min-width: 960px) {
  .page-about .about-recognition-grid {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
  }
}

.page-about .about-recognition-copy h3 {
  color: var(--kiwi);
  font-size: 1.4rem;
  margin: 0 0 0.75rem;
}

.page-about .about-recognition-copy p {
  color: rgba(247, 244, 233, 0.84);
  font-size: 0.98rem;
  line-height: 1.75;
}

.page-about .about-recognition-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.page-about .about-recognition-list li {
  border: 1px solid rgba(247, 244, 233, 0.28);
  color: var(--porcelain);
  border-radius: 999px;
  padding: 0.45rem 0.95rem;
  font-size: 13px;
}

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

.page-about .about-cert-card {
  perspective: 1000px;
  min-height: 130px;
}

.page-about .about-cert-card__inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.55s var(--ease);
  transform-style: preserve-3d;
}

.page-about .about-cert-card:hover .about-cert-card__inner,
.page-about .about-cert-card:focus-within .about-cert-card__inner {
  transform: rotateY(180deg);
}

.page-about .about-cert-card__face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-radius: 24px;
  padding: 1.25rem;
  text-align: center;
  border: 1px solid rgba(247, 244, 233, 0.24);
}

.page-about .about-cert-card__face--front {
  background: rgba(14, 30, 28, 0.28);
  color: var(--porcelain);
}

.page-about .about-cert-card__face--front b {
  font-size: 1.4rem;
  letter-spacing: 0.03em;
}

.page-about .about-cert-card__face--front small {
  margin-top: 0.45rem;
  font-size: 12px;
  color: rgba(247, 244, 233, 0.78);
}

.page-about .about-cert-card__face--back {
  background: var(--kiwi);
  color: var(--ink);
  transform: rotateY(180deg);
}

.page-about .about-cert-card__face--back b {
  font-size: 1.1rem;
}

.page-about .about-cert-card__face--back small {
  margin-top: 0.45rem;
  font-size: 12px;
  color: rgba(14, 30, 28, 0.72);
}

.page-about .about-recognition-visual {
  margin-top: 2.5rem;
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 860px) {
  .page-about .about-recognition-visual {
    grid-template-columns: 1.2fr 0.8fr;
    align-items: center;
  }
}

.page-about .about-recognition-visual figure {
  margin: 0;
  border-radius: var(--radius-l);
  overflow: hidden;
  background: rgba(14, 30, 28, 0.25);
  border: 1px solid rgba(247, 244, 233, 0.2);
}

.page-about .about-recognition-visual figure img {
  width: 100%;
  height: auto;
  display: block;
}

.page-about .about-recognition-visual figcaption {
  font-size: 13px;
  color: rgba(247, 244, 233, 0.6);
  padding: 0.8rem 1rem;
}

.page-about .about-recognition-visual__note h3 {
  color: var(--kiwi);
  font-size: 1.4rem;
  margin: 0 0 0.5rem;
}

.page-about .about-recognition-visual__note p {
  color: rgba(247, 244, 233, 0.8);
  margin: 0 0 1.25rem;
  line-height: 1.7;
}

.page-about .about-chapter-pager {
  position: fixed;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  z-index: 60;
  display: none;
  flex-direction: column;
  gap: 0.4rem;
  background: rgba(15, 76, 92, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.14);
  padding: 0.4rem;
  border-radius: 999px;
  box-shadow: 0 12px 32px rgba(14, 30, 28, 0.25);
}

@media (min-width: 1280px) {
  .page-about .about-chapter-pager {
    display: flex;
  }
}

.page-about .about-chapter-pager a {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  color: var(--porcelain);
  font-family: var(--font-mono);
  font-size: 12px;
  text-decoration: none;
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .about-chapter-pager a:hover,
.page-about .about-chapter-pager a.is-current,
.page-about .about-chapter-pager a[aria-current="true"] {
  background: var(--kiwi);
  color: var(--ink);
}