.page-about {
  --about-rail-w: 220px;
  max-width: calc(var(--content-w) - 2 * var(--space));
  margin: 0 auto;
  padding: 0 var(--space) clamp(3rem, 6vw, 5rem);
  font-family: var(--font-body);
  color: var(--c-text);
}

.page-about .breadcrumb {
  margin: 1.25rem 0 0;
}

.page-about .about-hero {
  position: relative;
  padding: clamp(2.5rem, 6vw, 5rem) 0 clamp(2rem, 4vw, 3rem);
  border-bottom: 1px solid var(--c-border);
  background-image:
    linear-gradient(rgba(0, 255, 135, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 135, 0.035) 1px, transparent 1px);
  background-size: 26px 26px;
}

.page-about .about-hero .eyebrow {
  margin: 0;
}

.page-about .about-hero__title {
  max-width: 14em;
  margin: 0.75rem 0 1rem;
  font-family: var(--font-head);
  font-size: clamp(2.2rem, 5vw, 4.5rem);
  line-height: 1.15;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.page-about .about-hero__lead {
  max-width: 42em;
  margin: 0;
  color: var(--c-muted);
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  line-height: 1.7;
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem 2.5rem;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--c-border);
}

.page-about .about-hero__meta .data-label {
  display: block;
  margin-bottom: 2px;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--c-muted);
  text-transform: uppercase;
}

.page-about .about-hero__meta .data-value {
  font-size: 1.35rem;
}

.page-about .about-split {
  display: block;
}

.page-about .about-rail {
  margin: 1.5rem 0 0.5rem;
}

.page-about .about-rail__track {
  display: flex;
  overflow-x: auto;
  gap: 0.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--c-border);
  scrollbar-width: thin;
}

.page-about .about-rail__node {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  padding: 0.4rem 0.9rem;
  border: 1px solid var(--c-border);
  border-radius: 999px;
  background: var(--c-surface);
  font-family: var(--font-data);
  font-size: 0.85rem;
  color: var(--c-muted);
}

.page-about .about-rail__node::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 6px;
  border-radius: 50%;
  background: var(--c-green);
}

.page-about .about-rail__node:hover {
  color: var(--c-green);
  border-color: var(--c-green-dim);
}

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

.page-about .about-main {
  min-width: 0;
}

.page-about .about-sec {
  padding: clamp(2.5rem, 5vw, 4rem) 0;
  border-bottom: 1px solid var(--c-border);
}

.page-about .about-sec:last-child {
  border-bottom: none;
}

.page-about .about-sec__head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.4rem 0.9rem;
  margin-bottom: 1.5rem;
}

.page-about .about-sec__head .eyebrow {
  margin: 0;
}

.page-about .about-sec__index {
  font-family: var(--font-data);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--c-green);
}

.page-about .about-sec__head h2 {
  width: 100%;
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(1.7rem, 3vw, 2.6rem);
  line-height: 1.1;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.page-about .about-sec__sub {
  width: 100%;
  margin: 0;
  color: var(--c-muted);
}

.page-about .about-origin {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.page-about .about-origin__media img {
  display: block;
  width: 100%;
  max-width: 300px;
  height: auto;
  border: 1px solid var(--c-border);
  border-radius: 8px;
  object-fit: cover;
}

.page-about .about-origin__cap,
.page-about .about-team__cap {
  display: block;
  margin-top: 0.5rem;
  font-family: var(--font-data);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--c-muted);
}

.page-about .about-origin__text p {
  margin: 0 0 1rem;
  color: var(--c-muted);
  line-height: 1.7;
}

.page-about .about-origin blockquote {
  margin: 1.5rem 0;
  padding: 0.9rem 1rem 0.9rem 1.2rem;
  border-left: 3px solid var(--c-green);
  border-radius: 0 8px 8px 0;
  background: var(--c-green-dim);
  color: var(--c-text);
  font-size: 0.95rem;
  line-height: 1.7;
}

.page-about .about-milestone {
  margin-bottom: 0.75rem;
  border: 1px solid var(--c-border);
  border-radius: 10px;
  background: var(--c-surface);
}

.page-about .about-milestone summary {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.6rem 1rem;
  padding: 0.9rem 1rem;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-milestone summary::after {
  content: '+';
  margin-left: auto;
  font-family: var(--font-data);
  font-size: 1.1rem;
  color: var(--c-green);
  transition: transform 0.2s ease;
}

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

.page-about .about-milestone__year {
  font-family: var(--font-data);
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-green);
}

.page-about .about-milestone__title {
  font-family: var(--font-head);
  font-size: 1rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.page-about .about-milestone p {
  margin: 0;
  padding: 0 1rem 1rem;
  color: var(--c-muted);
  font-size: 0.9rem;
  line-height: 1.7;
}

.page-about .about-chart {
  margin-top: 1.5rem;
  padding: 1.25rem;
}

.page-about .about-chart__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.page-about .about-chart__head h3 {
  margin: 0;
  font-family: var(--font-head);
  font-size: 1.2rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.page-about .about-chart__svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-chart__grid {
  stroke: var(--c-border);
  stroke-width: 1;
  stroke-dasharray: 3 5;
}

.page-about .about-chart__line {
  fill: none;
  stroke: var(--c-green);
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.page-about .about-chart__dot {
  fill: var(--c-bg);
  stroke: var(--c-green);
  stroke-width: 2;
}

.page-about .about-chart__label {
  fill: var(--c-muted);
  font-family: var(--font-data);
  font-size: 10px;
}

.page-about .about-chart__value {
  fill: var(--c-blue);
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 700;
}

.page-about .about-principles__wrap {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.2rem;
}

.page-about .about-vision img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--c-border);
  border-radius: 12px;
  object-fit: cover;
}

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

.page-about .about-principle {
  position: relative;
  overflow: hidden;
  padding: 1.4rem;
  border: 1px solid var(--c-border);
  border-radius: 12px;
  background: linear-gradient(135deg, var(--c-surface), rgba(20, 26, 35, 0.65));
}

.page-about .about-principle::after {
  content: '';
  position: absolute;
  top: -20px;
  right: -20px;
  width: 70px;
  height: 70px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.12), transparent 70%);
}

.page-about .about-principle__num {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  border: 1px solid var(--c-green-dim);
  border-radius: 4px;
  background: var(--c-green-dim);
  font-family: var(--font-data);
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-green);
}

.page-about .about-principle h3 {
  margin: 0.6rem 0 0.4rem;
  font-family: var(--font-head);
  font-size: 2.2rem;
  text-transform: uppercase;
}

.page-about .about-principle p {
  margin: 0;
  color: var(--c-muted);
  font-size: 0.9rem;
  line-height: 1.7;
}

.page-about .about-trust {
  margin-top: 1.2rem;
  padding: 1rem 1.2rem;
  border: 1px solid var(--c-green-dim);
  border-left: 4px solid var(--c-green);
  border-radius: 8px;
  background: var(--c-green-dim);
  color: var(--c-text);
  font-size: 0.92rem;
  line-height: 1.6;
}

.page-about .about-trust p {
  margin: 0;
}

.page-about .about-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.page-about .about-team__media img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--c-border);
  border-radius: 12px;
  object-fit: cover;
}

.page-about .about-team__content h3 {
  margin: 1.2rem 0 0.4rem;
  font-family: var(--font-head);
  font-size: 1.15rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--c-blue);
}

.page-about .about-team__content h3:first-child {
  margin-top: 0;
}

.page-about .about-team__content p {
  margin: 0;
  color: var(--c-muted);
  font-size: 0.92rem;
  line-height: 1.7;
}

.page-about .about-related {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.8rem;
}

@media (min-width: 900px) {

  .page-about .about-split {
    display: grid;
    grid-template-columns: var(--about-rail-w) 1fr;
    align-items: start;
    gap: clamp(2rem, 4vw, 4rem);
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    margin: 0;
    padding-top: clamp(2.5rem, 5vw, 4rem);
  }

  .page-about .about-rail__track {
    display: flex;
    flex-direction: column;
    gap: 0;
    padding: 0 0 0 2rem;
    border-bottom: none;
    border-left: 1px solid var(--c-border);
  }

  .page-about .about-rail__node {
    position: relative;
    display: flex;
    align-items: center;
    width: 100%;
    padding: 0.9rem 0;
    border: none;
    border-radius: 0;
    background: transparent;
  }

  .page-about .about-rail__node::before {
    content: '';
    position: absolute;
    left: -2.4rem;
    top: 50%;
    width: 9px;
    height: 9px;
    margin: 0;
    border: 2px solid var(--c-green);
    background: var(--c-bg);
    transform: translateY(-50%);
  }

  .page-about .about-rail__node:hover {
    color: var(--c-green);
  }

  .page-about .about-rail__hint {
    display: block;
    margin-top: 1.2rem;
    font-family: var(--font-data);
    font-size: 0.65rem;
    letter-spacing: 0.14em;
    color: var(--c-muted);
    writing-mode: vertical-rl;
  }

  .page-about .about-sec__head h2 {
    width: auto;
  }

  .page-about .about-origin {
    grid-template-columns: minmax(240px, 300px) 1fr;
    gap: 2.5rem;
  }

  .page-about .about-principles__wrap {
    grid-template-columns: 280px 1fr;
    gap: 1.5rem;
  }

  .page-about .about-team {
    grid-template-columns: 400px 1fr;
    gap: 2.5rem;
  }
}