.page-about {
  --about-line: rgba(230, 230, 230, 0.14);
  --about-panel: rgba(0, 229, 255, 0.06);
}

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

.page-about__breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding-top: 1.25rem;
  padding-bottom: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-muted);
  letter-spacing: 0.04em;
}

.page-about__breadcrumb a {
  color: var(--color-muted);
  text-decoration: none;
  transition: color var(--tr-fast);
}

.page-about__breadcrumb a:hover {
  color: var(--color-cyan);
}

.page-about__hero {
  padding: 1.25rem 0 2.5rem;
}

.page-about__hero-frame {
  position: relative;
  border: 1px solid var(--color-border);
  background: var(--color-bg-card);
  box-shadow: var(--shadow-md);
}

.page-about__hero-frame::before,
.page-about__hero-frame::after {
  content: "";
  position: absolute;
  width: 30px;
  height: 30px;
  border-color: var(--color-cyan);
  border-style: solid;
  pointer-events: none;
  z-index: 2;
}

.page-about__hero-frame::before {
  top: -1px;
  left: -1px;
  border-width: 2px 0 0 2px;
}

.page-about__hero-frame::after {
  bottom: -1px;
  right: -1px;
  border-width: 0 2px 2px 0;
}

.page-about__hero-media {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border);
}

.page-about__hero-img {
  display: block;
  width: 100%;
  min-height: 260px;
  object-fit: cover;
}

.page-about__hero-copy {
  padding: 1.25rem 1.25rem 1.5rem;
  background: rgba(19, 31, 54, 0.96);
}

.page-about__hero-kicker {
  display: inline-block;
  padding: 0.2rem 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--color-cyan);
  border: 1px solid var(--color-border);
  background: rgba(0, 229, 255, 0.08);
  margin-bottom: 0.75rem;
}

.page-about__hero-copy h1 {
  margin: 0 0 0.4rem;
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 5vw, 3rem);
  letter-spacing: 0.02em;
  color: var(--color-text);
}

.page-about__hero-sub {
  margin: 0 0 0.75rem;
  font-family: var(--font-heading);
  font-size: clamp(1rem, 2.6vw, 1.4rem);
  color: var(--color-cyan);
}

.page-about__hero-desc {
  max-width: 46rem;
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--color-muted);
}

.page-about__hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.page-about__hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.5rem;
  padding: 0.75rem 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-muted);
  border-top: 1px solid var(--color-border);
  background: rgba(0, 0, 0, 0.18);
}

.page-about__section {
  border-top: 1px solid var(--about-line);
}

.page-about__section-head::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 64px;
  height: 1px;
  background: linear-gradient(90deg, var(--color-cyan), var(--color-orange));
}

.page-about__origin-note {
  max-width: 48rem;
  margin-bottom: 1.5rem;
  padding: 1rem 1rem 1rem 1.25rem;
  border-left: 2px solid var(--color-cyan);
  background: var(--about-panel);
  font-size: 0.95rem;
  line-height: 1.9;
  color: var(--color-muted);
}

.page-about__origin-note p {
  margin: 0;
}

.page-about__origin-grid {
  margin-bottom: 1.25rem;
}

.page-about__drawer {
  position: relative;
  overflow: hidden;
  transition: background var(--tr-fast), border-color var(--tr-fast);
}

.page-about__drawer:hover {
  background: rgba(0, 229, 255, 0.07);
}

.page-about__drawer-tab {
  display: block;
  margin-bottom: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  color: var(--color-cyan);
  opacity: 0.85;
}

.page-about__origin-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
}

.page-about__inline-link {
  margin-left: 0.25rem;
  font-size: 0.82rem;
  color: var(--color-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, 0.35);
}

.page-about__inline-link:hover {
  color: var(--color-text);
  border-bottom-color: var(--color-text);
}

.page-about__milestone-figure {
  margin: 0 0 2rem;
  border: 1px solid var(--color-border);
  background: var(--color-bg-card);
}

.page-about__milestone-img {
  display: block;
  width: 100%;
}

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

.page-about__timeline::before {
  content: "";
  position: absolute;
  left: 1.35rem;
  top: 0.4rem;
  bottom: 0.4rem;
  width: 1px;
  background: linear-gradient(180deg, var(--color-cyan), var(--color-orange));
}

.page-about__timeline-item {
  position: relative;
  padding: 0 0 1.75rem 3.6rem;
}

.page-about__timeline-item:last-child {
  padding-bottom: 0;
}

.page-about__timeline-node {
  position: absolute;
  left: 0.55rem;
  top: 0.1rem;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 1.6rem;
  height: 1.6rem;
  border: 1px solid var(--color-cyan);
  border-radius: 50%;
  background: var(--color-bg);
  color: var(--color-cyan);
  font-family: var(--font-mono);
  font-size: 0.62rem;
}

.page-about__timeline-body {
  padding: 1rem 1.2rem;
  border: 1px solid var(--color-border);
  background: var(--about-panel);
  transition: border-color var(--tr-fast), background var(--tr-fast);
}

.page-about__timeline-body:hover {
  border-color: var(--color-cyan);
  background: rgba(0, 229, 255, 0.08);
}

.page-about__timeline-body h3 {
  margin: 0 0 0.4rem;
  font-family: var(--font-heading);
  font-size: 1.05rem;
  color: var(--color-text);
}

.page-about__timeline-body p {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--color-muted);
}

.page-about__tech-wrap {
  display: grid;
  gap: 1.5rem;
}

.page-about__tech-figure {
  margin: 0;
  border: 1px solid var(--color-border);
  background: var(--color-bg-card);
  overflow: hidden;
}

.page-about__tech-img {
  display: block;
  width: 100%;
}

.page-about__tech-flow {
  display: grid;
  gap: 0.9rem;
}

.page-about__tech-step {
  display: flex;
  gap: 1rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--color-border);
  background: var(--about-panel);
  transition: border-color var(--tr-fast), background var(--tr-fast);
}

.page-about__tech-step:hover {
  border-color: var(--color-cyan);
  background: rgba(0, 229, 255, 0.07);
}

.page-about__tech-num {
  flex-shrink: 0;
  display: grid;
  place-items: center;
  width: 1.8rem;
  height: 1.8rem;
  border: 1px solid var(--color-cyan);
  color: var(--color-cyan);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.page-about__tech-step h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--color-text);
}

.page-about__tech-step p {
  margin: 0;
  font-size: 0.84rem;
  line-height: 1.7;
  color: var(--color-muted);
}

.page-about__tech-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.8rem;
  margin: 1.5rem 0 1rem;
  padding: 0;
  list-style: none;
}

.page-about__tech-stats li {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 1rem;
  border: 1px solid var(--color-border);
  background: rgba(230, 230, 230, 0.03);
  font-size: 0.75rem;
  color: var(--color-muted);
}

.page-about__tech-stat-num {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: var(--color-cyan);
}

.page-about__tech-note {
  padding: 0.8rem 1rem;
  border-left: 2px solid var(--color-orange);
  background: rgba(255, 107, 53, 0.05);
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--color-muted);
}

.page-about__tech-note a {
  color: var(--color-cyan);
  text-decoration: none;
}

.page-about__tech-note a:hover {
  color: var(--color-text);
}

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

.page-about__cert-card {
  position: relative;
  overflow: hidden;
  transition: background var(--tr-fast), border-color var(--tr-fast);
}

.page-about__cert-head {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.6rem;
}

.page-about__cert-badge {
  display: inline-grid;
  place-items: center;
  padding: 0.15rem 0.5rem;
  border: 1px solid var(--color-orange);
  color: var(--color-orange);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
}

.page-about__cert-id {
  margin: 0 0 0.6rem;
  font-family: var(--font-mono);
  font-size: 1.15rem;
  color: var(--color-cyan);
  overflow-wrap: anywhere;
}

.page-about__cert-more {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--color-muted);
}

.page-about__cert-more a {
  color: var(--color-cyan);
  text-decoration: none;
}

.page-about__cert-more a:hover {
  color: var(--color-text);
}

.page-about__eco-intro {
  max-width: 42rem;
  margin: 0 0 1.4rem;
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--color-muted);
}

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

.page-about__eco-card {
  padding: 1.1rem 1.2rem;
  border: 1px solid var(--color-border);
  background: rgba(230, 230, 230, 0.03);
  transition: border-color var(--tr-fast), background var(--tr-fast);
}

.page-about__eco-card:hover {
  border-color: var(--color-orange);
  background: rgba(255, 107, 53, 0.05);
}

.page-about__eco-num {
  display: inline-block;
  margin-bottom: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-orange);
  letter-spacing: 0.1em;
}

.page-about__eco-card h3 {
  margin: 0 0 0.4rem;
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--color-text);
}

.page-about__eco-card p {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--color-muted);
}

.page-about__team-meta {
  max-width: 42rem;
  margin: 0 0 1.2rem;
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--color-muted);
}

.page-about__team-meta p {
  margin: 0;
}

.page-about__values {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-bottom: 1.6rem;
}

.page-about__value {
  padding: 0.4rem 1rem;
  border: 1px solid var(--color-border);
  background: var(--about-panel);
  font-family: var(--font-heading);
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  color: var(--color-text);
}

.page-about__value:nth-child(1) {
  border-color: rgba(0, 229, 255, 0.5);
  color: var(--color-cyan);
}

.page-about__value:nth-child(3) {
  border-color: rgba(255, 107, 53, 0.5);
  color: var(--color-orange);
}

.page-about__dept-list {
  display: grid;
  gap: 0.7rem;
}

.page-about__dept {
  border: 1px solid var(--color-border);
  background: var(--about-panel);
  transition: border-color var(--tr-fast), background var(--tr-fast);
}

.page-about__dept[open] {
  border-color: var(--color-cyan);
  background: rgba(0, 229, 255, 0.07);
}

.page-about__dept summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 1.1rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  color: var(--color-text);
}

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

.page-about__dept summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--color-cyan);
  transition: transform var(--tr-fast);
}

.page-about__dept[open] summary::after {
  content: "−";
}

.page-about__dept p {
  margin: 0;
  padding: 0.7rem 1.1rem 1rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.84rem;
  line-height: 1.7;
  color: var(--color-muted);
}

.page-about__contact-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
  margin-bottom: 1.5rem;
}

.page-about__contact-value {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--color-text);
  overflow-wrap: anywhere;
}

.page-about__contact-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  padding: 1.1rem 1.2rem;
  border: 1px solid var(--color-orange);
  background: rgba(255, 107, 53, 0.06);
}

.page-about__contact-cta p {
  flex: 1 1 18rem;
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--color-muted);
}

.page-about__contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  flex-shrink: 0;
}

@media (min-width: 768px) {
  .page-about__hero {
    padding: 2rem 0 4rem;
  }

  .page-about__hero-media {
    aspect-ratio: 16 / 9;
    min-height: 440px;
  }

  .page-about__hero-img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    min-height: 0;
  }

  .page-about__hero-copy {
    position: absolute;
    inset: 0;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    padding: 3rem 3.5rem;
    background: linear-gradient(90deg, rgba(19, 31, 54, 0.92) 0%, rgba(19, 31, 54, 0.6) 58%, rgba(19, 31, 54, 0.1) 100%);
  }

  .page-about__hero-desc {
    max-width: 40rem;
  }

  .page-about__tech-wrap {
    grid-template-columns: 0.95fr 1.2fr;
    align-items: center;
  }

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

  .page-about__cert-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about__cert-card:hover {
    background: rgba(0, 229, 255, 0.07);
  }

  .page-about__cert-card:hover .page-about__cert-more {
    color: var(--color-text);
  }

  .page-about__eco-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about__contact-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about__contact-cta {
    flex-wrap: nowrap;
  }
}

@media (min-width: 1024px) {
  .page-about__timeline-item {
    padding-left: 4rem;
  }

  .page-about__timeline-node {
    left: 0.7rem;
    width: 1.7rem;
    height: 1.7rem;
  }

  .page-about__timeline::before {
    left: 1.55rem;
  }

  .page-about__section-head {
    margin-bottom: 1rem;
  }
}