.page-about {
  background: var(--color-light);
  color: var(--color-text);
  overflow-x: hidden;
}

.page-about .about-cover-grid,
.page-about .about-cover-meta-inner,
.page-about .about-origin-inner,
.page-about .about-evolution-inner,
.page-about .about-capability-inner,
.page-about .about-ecosystem-inner,
.page-about .about-careers-inner {
  width: 100%;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
  box-sizing: border-box;
}

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

.page-about .about-cover {
  position: relative;
  padding: 128px 0 64px;
  background:
    linear-gradient(150deg, rgba(196, 255, 0, 0.08) 0 4%, transparent 4%),
    var(--color-navy);
  color: var(--color-light);
  overflow: hidden;
}

.page-about .about-cover::before {
  content: "";
  position: absolute;
  right: -80px;
  top: 90px;
  height: 240px;
  width: 480px;
  background: repeating-linear-gradient(
    -45deg,
    transparent 0 14px,
    rgba(242, 183, 5, 0.18) 14px 18px
  );
  transform: skewX(-12deg);
  pointer-events: none;
}

.page-about .about-cover::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 10px;
  background: linear-gradient(90deg, var(--color-gold) 0 18%, var(--color-lime) 18% 100%);
  pointer-events: none;
}

.page-about .about-cover-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}

.page-about .about-cover .breadcrumbs {
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 18px;
}

.page-about .about-cover .breadcrumbs a {
  color: var(--color-lime);
}

.page-about .about-cover .breadcrumbs [aria-current="page"] {
  color: rgba(255, 255, 255, 0.72);
}

.page-about .about-cover-kicker {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--color-lime);
  margin-bottom: 16px;
}

.page-about .about-cover-title {
  font-family: var(--font-sans);
  font-weight: 900;
  font-style: italic;
  font-size: clamp(2.4rem, 6vw, 4.6rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--color-white);
  margin: 18px 0 24px;
}

.page-about .about-title-mark {
  position: relative;
  display: inline-block;
  font-style: italic;
  color: var(--color-lime);
  background: linear-gradient(transparent 62%, rgba(196, 255, 0, 0.18) 62%);
  padding: 0 4px;
}

.page-about .about-cover-lead {
  max-width: 620px;
  font-size: 1.05rem;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.78);
  margin: 0 0 32px;
}

.page-about .about-cover-index {
  max-width: 480px;
  border: 2px solid rgba(196, 255, 0, 0.5);
  background: rgba(255, 255, 255, 0.04);
  padding: 20px 22px;
  display: flex;
  flex-direction: column;
}

.page-about .about-index-title {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: 12px;
}

.page-about .about-index-item {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 13px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--color-light);
  text-decoration: none;
  font-weight: 500;
  transition: padding-left 0.25s ease, color 0.25s ease;
}

.page-about .about-index-item:last-child {
  border-bottom: 0;
}

.page-about .about-index-item span {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-gold);
}

.page-about .about-index-item:hover {
  padding-left: 8px;
  color: var(--color-lime);
}

.page-about .about-cover-figure {
  margin: 0;
  position: relative;
  background: var(--color-navy-secondary);
  border: 3px solid var(--color-lime);
  box-shadow: 14px 14px 0 rgba(242, 183, 5, 0.5);
  transform: rotate(1.4deg);
}

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

.page-about .about-cover-figure figcaption {
  padding: 12px 14px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--color-lime);
  background: rgba(255, 255, 255, 0.04);
  border-top: 1px solid rgba(196, 255, 0, 0.25);
}

.page-about .about-cover-meta {
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  margin-top: 56px;
  padding-top: 20px;
}

.page-about .about-cover-meta-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 32px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.72);
}

.page-about .about-cover-meta span::before {
  content: "●";
  color: var(--color-lime);
  margin-right: 8px;
  font-size: 10px;
}

.page-about .about-section {
  padding: 72px 0;
  scroll-margin-top: 90px;
}

.page-about .about-section-head {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 36px;
  position: relative;
}

.page-about .about-section-head::before {
  content: "";
  width: 56px;
  height: 6px;
  background: var(--color-lime);
  margin-bottom: 8px;
}

.page-about .about-section-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.24em;
  color: var(--color-gold);
  border: 2px solid currentColor;
  padding: 6px 10px 4px;
  transform: skewX(-12deg);
  display: inline-block;
}

.page-about .about-section-title {
  font-family: var(--font-sans);
  font-size: clamp(1.9rem, 4vw, 3rem);
  line-height: 1.15;
  font-weight: 900;
  margin: 0;
  color: var(--color-navy);
}

.page-about .about-section-sub {
  color: var(--color-gray);
  font-size: 1rem;
  line-height: 1.6;
  margin: 0;
}

.page-about .about-origin {
  background: var(--color-light);
  position: relative;
}

.page-about .about-origin::after {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  width: 140px;
  height: 140px;
  background: linear-gradient(135deg, transparent 48%, rgba(196, 255, 0, 0.5) 50%, transparent 53%);
  pointer-events: none;
}

.page-about .about-origin-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .about-origin-copy p {
  line-height: 1.9;
  margin: 0 0 16px;
}

.page-about .about-origin-copy p:last-child {
  margin-bottom: 0;
}

.page-about .about-origin-quote {
  position: relative;
  background: var(--color-lime);
  border: 3px solid var(--color-navy);
  box-shadow: 8px 8px 0 rgba(10, 30, 60, 0.18);
  padding: 32px 28px 28px;
  transform: rotate(0.8deg);
  margin: 0;
}

.page-about .about-origin-quote::before {
  content: "";
  position: absolute;
  top: -14px;
  right: -12px;
  width: 44px;
  height: 44px;
  background: var(--color-gold);
  clip-path: polygon(52% 0, 62% 38%, 100% 50%, 62% 62%, 52% 100%, 42% 62%, 0 50%, 42% 38%);
}

.page-about .about-quote-mark {
  display: block;
  font-family: Georgia, serif;
  font-size: 4rem;
  line-height: 1;
  color: var(--color-navy);
}

.page-about .about-origin-quote p {
  font-weight: 700;
  font-size: 1.2rem;
  line-height: 1.6;
  color: var(--color-navy);
  margin: -8px 0 12px;
}

.page-about .about-quote-source {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--color-navy);
  border-top: 2px solid rgba(10, 30, 60, 0.3);
  padding-top: 8px;
}

.page-about .about-evolution {
  background: var(--color-navy);
  color: var(--color-light);
}

.page-about .about-evolution .about-section-title {
  color: var(--color-white);
}

.page-about .about-evolution .about-section-sub {
  color: rgba(255, 255, 255, 0.7);
}

.page-about .about-evolution-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}

.page-about .about-timeline-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
}

.page-about .about-evolution .filter-btn {
  border: 2px solid rgba(255, 255, 255, 0.28);
  background: transparent;
  color: var(--color-light);
  padding: 8px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.2s, background-color 0.2s, color 0.2s;
}

.page-about .about-evolution .filter-btn:hover,
.page-about .about-evolution .filter-btn[aria-pressed="true"] {
  border-color: var(--color-lime);
  background: rgba(196, 255, 0, 0.12);
  color: var(--color-lime);
}

.page-about .about-timeline {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
}

.page-about .about-timeline.filter-grid {
  display: block;
}

.page-about .about-timeline .filter-item {
  display: block;
}

.page-about .about-timeline-item {
  position: relative;
  padding: 0 0 36px 40px;
}

.page-about .about-timeline-item::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 16px;
  bottom: -10px;
  width: 3px;
  background: linear-gradient(180deg, var(--color-gold), rgba(196, 255, 0, 0.1));
}

.page-about .about-timeline-item:last-child::before {
  display: none;
}

.page-about .about-timeline-item::after {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 20px;
  height: 20px;
  background: var(--color-navy);
  border: 3px solid var(--color-gold);
  transform: rotate(45deg);
  box-shadow: 0 0 0 5px rgba(242, 183, 5, 0.16);
}

.page-about .about-timeline-year {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-gold);
  letter-spacing: 0.06em;
  margin-bottom: 10px;
}

.page-about .about-timeline-card {
  border: 2px solid rgba(255, 255, 255, 0.14);
  background: var(--color-navy-secondary);
  padding: 24px;
  box-shadow: 8px 8px 0 rgba(0, 0, 0, 0.28);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.page-about .about-timeline-card h3 {
  font-size: 1.15rem;
  font-weight: 800;
  margin: 0 0 8px;
  color: var(--color-white);
}

.page-about .about-timeline-card p {
  margin: 0;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.95rem;
}

.page-about .about-timeline-item:hover .about-timeline-card {
  transform: translateX(8px) rotate(-0.4deg);
  border-color: var(--color-lime);
  box-shadow: 12px 12px 0 rgba(196, 255, 0, 0.18);
}

.page-about .about-evolution-figure {
  margin: 12px 0 0;
  border: 3px solid rgba(196, 255, 0, 0.55);
  box-shadow: 12px 12px 0 rgba(0, 0, 0, 0.35);
  background: var(--color-navy-secondary);
}

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

.page-about .about-evolution-figure figcaption {
  padding: 12px 14px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--color-gold);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.page-about .about-capability {
  background: var(--color-light);
}

.page-about .about-stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-bottom: 52px;
}

.page-about .about-stat-card {
  border: 3px solid var(--color-navy);
  background: var(--color-white);
  box-shadow: 8px 8px 0 rgba(10, 30, 60, 0.16);
  padding: 28px 18px 22px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 4px;
  position: relative;
  transition: transform 0.25s ease;
}

.page-about .about-stat-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 12px;
  right: 12px;
  height: 6px;
  background: var(--color-lime);
}

.page-about .about-stat-card:hover {
  transform: translateY(-6px);
}

.page-about .about-stat-card strong {
  font-family: var(--font-mono);
  font-size: clamp(2.6rem, 6vw, 4rem);
  line-height: 1;
  color: var(--color-navy);
  letter-spacing: -0.04em;
}

.page-about .about-stat-card span {
  font-size: 0.9rem;
  color: var(--color-gray);
  font-weight: 600;
}

.page-about .about-capability-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: start;
}

.page-about .about-capability-figure {
  margin: 0;
  border: 3px solid var(--color-navy);
  box-shadow: 10px 10px 0 rgba(10, 30, 60, 0.18);
  background: var(--color-white);
}

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

.page-about .about-capability-figure figcaption {
  padding: 12px 14px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--color-text);
  border-top: 2px solid var(--color-line);
}

.page-about .about-team h3 {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-navy);
  margin: 0 0 18px;
}

.page-about .about-team-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-team-list li {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 4px 16px;
  border: 2px solid var(--color-navy);
  background: var(--color-white);
  padding: 18px 20px;
  box-shadow: 5px 5px 0 rgba(10, 30, 60, 0.12);
}

.page-about .about-team-list li span {
  font-weight: 700;
  color: var(--color-navy);
}

.page-about .about-team-list li em {
  grid-column: 1;
  font-style: normal;
  font-size: 0.82rem;
  color: var(--color-gray);
}

.page-about .about-team-list li strong {
  grid-row: 1 / span 2;
  grid-column: 2;
  background: var(--color-lime);
  color: var(--color-navy);
  font-family: var(--font-mono);
  font-size: 1.5rem;
  padding: 8px 10px;
  font-weight: 700;
}

.page-about .about-ecosystem {
  background: var(--color-navy);
  color: var(--color-light);
}

.page-about .about-ecosystem .about-section-title {
  color: var(--color-white);
}

.page-about .about-ecosystem .about-section-sub {
  color: rgba(255, 255, 255, 0.7);
}

.page-about .about-eco-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.page-about .about-credential-list {
  display: grid;
  gap: 18px;
}

.page-about .about-credential-card {
  border: 2px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.05);
  padding: 24px;
  box-shadow: 8px 8px 0 rgba(0, 0, 0, 0.22);
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.page-about .about-credential-card:hover {
  border-color: var(--color-gold);
  transform: translateX(6px);
}

.page-about .about-credential-ic {
  font-size: 1.4rem;
  color: var(--color-gold);
  display: block;
  margin-bottom: 8px;
}

.page-about .about-credential-card h3 {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--color-white);
  margin: 0 0 8px;
}

.page-about .about-credential-card p {
  margin: 0;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.92rem;
  line-height: 1.7;
}

.page-about .about-partner {
  border: 3px solid var(--color-lime);
  background: rgba(196, 255, 0, 0.08);
  padding: 32px;
  box-shadow: 12px 12px 0 rgba(0, 0, 0, 0.28);
  position: relative;
  overflow: hidden;
}

.page-about .about-partner::after {
  content: "";
  position: absolute;
  right: -24px;
  bottom: -24px;
  width: 110px;
  height: 110px;
  border: 14px solid rgba(242, 183, 5, 0.22);
  border-radius: 50%;
  pointer-events: none;
}

.page-about .about-partner h3 {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-lime);
  margin: 0 0 14px;
}

.page-about .about-partner p {
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.78);
  margin: 0 0 24px;
  font-size: 0.95rem;
}

.page-about .about-careers {
  background: var(--color-light);
}

.page-about .about-careers-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .about-careers-copy p {
  line-height: 1.9;
  margin-bottom: 16px;
}

.page-about .about-careers-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-careers-tag {
  border: 2px solid var(--color-navy);
  background: var(--color-white);
  color: var(--color-navy);
  font-weight: 700;
  font-size: 0.9rem;
  padding: 12px 18px;
  box-shadow: 4px 4px 0 rgba(10, 30, 60, 0.12);
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.page-about .about-careers-tag:hover {
  background: var(--color-navy);
  color: var(--color-lime);
  transform: rotate(-1deg);
}

@media (min-width: 768px) {
  .page-about .about-section {
    padding: 96px 0;
  }

  .page-about .about-cover {
    padding-top: 168px;
  }

  .page-about .about-stats-grid {
    gap: 24px;
  }
}

@media (min-width: 900px) {
  .page-about .about-cover-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(300px, 0.88fr);
    gap: 64px;
    align-items: center;
  }

  .page-about .about-origin-grid {
    grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
    gap: 48px;
    align-items: start;
  }

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

  .page-about .about-capability-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 56px;
  }

  .page-about .about-eco-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-careers-grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    gap: 48px;
    align-items: center;
  }
}

@media (min-width: 1024px) {
  .page-about .about-evolution-inner {
    grid-template-columns: minmax(0, 1.7fr) minmax(260px, 0.8fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-timeline-card {
    padding: 28px;
  }

  .page-about .about-partner {
    padding: 40px;
  }
}

@media (min-width: 1280px) {
  .page-about .about-rail {
    display: flex;
    flex-direction: column;
    position: fixed;
    left: 0;
    top: 0;
    width: 196px;
    height: 100vh;
    padding: 120px 24px 48px;
    background: var(--color-navy-deep);
    border-right: 2px solid rgba(196, 255, 0, 0.28);
    overflow-y: auto;
    z-index: 30;
    box-sizing: border-box;
  }

  .page-about .about-rail-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--color-lime);
    margin-bottom: 24px;
    padding-left: 10px;
  }

  .page-about .about-rail-link {
    color: rgba(255, 255, 255, 0.72);
    text-decoration: none;
    font-size: 0.82rem;
    font-weight: 500;
    padding: 8px 10px;
    border-left: 2px solid transparent;
    transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease;
  }

  .page-about .about-rail-link:hover {
    color: var(--color-lime);
    border-left-color: var(--color-lime);
    background: rgba(196, 255, 0, 0.08);
  }

  .page-about .about-cover,
  .page-about .about-section {
    padding-left: 196px;
  }

  .page-about .about-cover {
    min-height: 92vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }
}