.page-about {
  --page-gutter: clamp(20px, 4vw, 48px);
  --card-shadow: 0 16px 36px rgba(0, 0, 0, 0.25);
  position: relative;
  isolation: isolate;
  background:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    radial-gradient(900px 500px at 85% -5%, rgba(157, 78, 221, 0.16), transparent 60%),
    radial-gradient(700px 420px at -5% 25%, rgba(0, 240, 255, 0.08), transparent 55%),
    var(--gradient-main);
  background-size: 44px 44px, 44px 44px, auto, auto, auto;
  overflow: hidden;
}

.page-about .breadcrumb {
  max-width: var(--container-width);
  margin-inline: auto;
  padding: 28px var(--page-gutter) 0;
}

.page-about .about-hero {
  padding: 40px var(--page-gutter) 56px;
  position: relative;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(245, 197, 24, 0.4), rgba(0, 240, 255, 0.25), transparent);
}

.page-about .about-hero__inner {
  max-width: var(--container-width);
  margin-inline: auto;
  display: grid;
  gap: 32px;
  align-items: center;
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}

.page-about .about-hero h1 {
  font-family: var(--font-cn);
  font-size: clamp(2.2rem, 6vw, 4.2rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0 0 6px;
  color: var(--color-text);
}

.page-about .about-hero__subtitle {
  font-family: var(--font-en);
  font-size: 0.95rem;
  font-weight: 200;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-cyan);
  margin: 0 0 20px;
}

.page-about .about-hero__desc {
  color: var(--color-text-secondary);
  max-width: 56rem;
  margin: 0;
  line-height: 1.8;
}

.page-about .about-hero__principles {
  margin-top: 24px;
  padding: 18px 20px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(245, 197, 24, 0.25);
  border-left: 3px solid var(--color-gold);
  border-radius: var(--radius-md);
  backdrop-filter: blur(8px);
}

.page-about .about-hero__principles-title {
  font-weight: 700;
  color: var(--color-gold);
  margin: 0 0 8px;
  letter-spacing: 0.05em;
}

.page-about .about-hero__principles p {
  margin: 0;
  color: var(--color-text-secondary);
  line-height: 1.75;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin: 28px 0 0;
}

.page-about .stat-item {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  box-shadow: var(--card-shadow);
}

.page-about .stat-item dt {
  font-size: 0.78rem;
  color: var(--color-text-secondary);
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}

.page-about .stat-item dd {
  font-family: var(--font-mono);
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--color-gold);
  margin: 0;
}

.page-about .about-hero__media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.3);
  align-self: stretch;
}

.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(245, 197, 24, 0.12), transparent 40%, rgba(157, 78, 221, 0.12));
  pointer-events: none;
}

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

.page-about .about-layout {
  max-width: var(--container-width);
  margin-inline: auto;
  padding: 0 var(--page-gutter) 64px;
  display: grid;
  gap: 28px;
}

.page-about .about-index {
  display: flex;
  align-items: center;
  gap: 12px;
  overflow-x: auto;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  scrollbar-width: none;
}

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

.page-about .about-index__label {
  font-family: var(--font-en);
  font-size: 0.7rem;
  font-weight: 300;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-purple);
  white-space: nowrap;
}

.page-about .about-index__list {
  display: flex;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-index__list a {
  display: block;
  padding: 6px 12px;
  border-radius: 999px;
  color: var(--color-text-secondary);
  font-size: 0.82rem;
  text-decoration: none;
  border: 1px solid transparent;
  white-space: nowrap;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  color: var(--color-gold);
  border-color: rgba(245, 197, 24, 0.35);
  background: rgba(245, 197, 24, 0.08);
}

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

.page-about .about-section {
  padding: 48px 0 8px;
  scroll-margin-top: calc(var(--header-height) + 16px);
}

.page-about .about-section .section-head {
  margin-bottom: 18px;
}

.page-about .about-milestones__intro,
.page-about .about-certs__intro {
  color: var(--color-text-secondary);
  line-height: 1.75;
  max-width: 46rem;
  margin: 0 0 28px;
}

.page-about .milestones-scroll {
  overflow-x: auto;
  scroll-snap-type: x proximity;
  padding-bottom: 10px;
  scrollbar-color: rgba(245, 197, 24, 0.5) rgba(255, 255, 255, 0.08);
  -webkit-overflow-scrolling: touch;
}

.page-about .milestones-track {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 40px 0 8px;
  display: flex;
  gap: 16px;
  min-width: max-content;
}

.page-about .milestones-track::before {
  content: "";
  position: absolute;
  top: 26px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(245, 197, 24, 0.7) 8%, rgba(245, 197, 24, 0.25) 90%, transparent);
  pointer-events: none;
}

.page-about .milestone-entry {
  position: relative;
  flex: 0 0 clamp(240px, 72vw, 300px);
  scroll-snap-align: start;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 56px 20px 20px;
  box-shadow: var(--card-shadow);
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.page-about .milestone-entry:hover {
  transform: translateY(-3px);
  border-color: rgba(0, 240, 255, 0.4);
}

.page-about .milestone-entry::before {
  content: "";
  position: absolute;
  top: 20px;
  left: 20px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-gold);
  box-shadow: 0 0 0 4px rgba(245, 197, 24, 0.18), 0 0 18px rgba(245, 197, 24, 0.6);
}

.page-about .milestone-entry__year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-purple);
  letter-spacing: 0.12em;
  margin-bottom: 10px;
}

.page-about .milestone-entry__title {
  font-size: 1.06rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 8px;
  line-height: 1.4;
}

.page-about .milestone-entry__desc {
  font-size: 0.86rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin: 0;
}

.page-about .milestone-entry--latest {
  border-color: rgba(245, 197, 24, 0.45);
  background: linear-gradient(180deg, rgba(245, 197, 24, 0.1), rgba(255, 255, 255, 0.04));
}

.page-about .milestone-entry--latest .milestone-entry__year {
  color: var(--color-gold);
}

.page-about .about-milestones__media {
  margin: 36px 0 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.25);
  max-width: 100%;
}

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

.page-about .certs-grid {
  display: grid;
  gap: 16px;
}

.page-about .cert-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--card-shadow);
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.page-about .cert-card:hover {
  border-color: rgba(0, 240, 255, 0.4);
  transform: translateY(-2px);
}

.page-about .cert-card summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px;
}

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

.page-about .cert-card__icon {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-border);
}

.page-about .cert-card__text {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.page-about .cert-card__name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.3;
}

.page-about .cert-card__scope {
  font-size: 0.78rem;
  color: var(--color-text-secondary);
  letter-spacing: 0.05em;
}

.page-about .cert-card__mark {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1.4rem;
  color: var(--color-cyan);
  transition: transform 0.3s ease;
}

.page-about .cert-card[open] .cert-card__mark {
  transform: rotate(45deg);
}

.page-about .cert-card__body {
  padding: 0 20px 20px 86px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  font-size: 0.88rem;
}

.page-about .cert-card__body p {
  margin: 0 0 12px;
}

.page-about .cert-card__body ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .cert-card__body li {
  position: relative;
  padding-left: 18px;
}

.page-about .cert-card__body li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-gold);
}

.page-about .cert-card--level .cert-card__body li::before {
  background: var(--color-cyan);
}

.page-about .cert-card--data .cert-card__body li::before {
  background: var(--color-purple);
}

.page-about .ecosystem-grid {
  display: grid;
  gap: 32px;
  align-items: center;
}

.page-about .ecosystem-copy__lead {
  font-size: 1.06rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.7;
  margin: 0 0 12px;
}

.page-about .ecosystem-copy__desc {
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin: 0 0 20px;
}

.page-about .ecosystem-stat {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 22px;
  padding: 10px 18px;
  border-left: 3px solid var(--color-gold);
  background: linear-gradient(90deg, rgba(245, 197, 24, 0.1), transparent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.page-about .ecosystem-stat__num {
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-gold);
  line-height: 1;
}

.page-about .ecosystem-stat__label {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  letter-spacing: 0.08em;
}

.page-about .ecosystem-tabs {
  margin-bottom: 22px;
}

.page-about .ecosystem-copy .btn {
  margin-top: 4px;
}

.page-about .ecosystem-figure {
  position: relative;
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
  transform: translateZ(0);
}

.page-about .ecosystem-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(10, 15, 46, 0.3));
  pointer-events: none;
}

.page-about .ecosystem-figure img {
  display: block;
  width: 100%;
  height: auto;
  transition: transform 1.2s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.page-about .ecosystem-figure:hover img,
.page-about .ecosystem-figure:focus-within img {
  transform: scale(1.06);
}

.page-about .awards-list {
  display: grid;
  gap: 16px;
}

.page-about .award-item {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 18px;
  padding: 24px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--card-shadow);
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.page-about .award-item:hover {
  border-color: rgba(245, 197, 24, 0.45);
  transform: translateY(-2px);
}

.page-about .award-item__icon {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-border);
}

.page-about .award-item__body h3 {
  font-size: 1.06rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 8px;
  line-height: 1.4;
}

.page-about .award-item__body p {
  color: var(--color-text-secondary);
  line-height: 1.7;
  font-size: 0.88rem;
  margin: 0;
}

.page-about .team-grid {
  display: grid;
  gap: 28px;
}

.page-about .team-overview {
  padding: 28px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(157, 78, 221, 0.18), rgba(10, 15, 46, 0.5));
  border: 1px solid rgba(157, 78, 221, 0.35);
  box-shadow: var(--card-shadow);
}

.page-about .team-overview__num {
  font-family: var(--font-mono);
  font-size: 4rem;
  font-weight: 800;
  line-height: 1;
  color: var(--color-purple);
  margin: 0 0 6px;
}

.page-about .team-overview__label {
  font-size: 0.82rem;
  color: var(--color-text-secondary);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin: 0 0 16px;
}

.page-about .team-overview__desc {
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin: 0 0 20px;
}

.page-about .team-overview__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .team-card-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .team-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 20px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.page-about .team-card:hover {
  border-color: rgba(0, 240, 255, 0.4);
  transform: translateX(4px);
}

.page-about .team-card__name {
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--color-text);
}

.page-about .team-card__desc {
  font-size: 0.84rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

.page-about .about-directory {
  max-width: var(--container-width);
  margin-inline: auto;
  padding: 40px var(--page-gutter) 72px;
}

.page-about .about-directory .section-head {
  margin-bottom: 24px;
}

.page-about .directory-links {
  display: grid;
  gap: 12px;
}

.page-about .directory-links__item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 20px 22px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-weight: 700;
  text-decoration: none;
  transition: border-color 0.3s ease, transform 0.3s ease, background 0.3s ease;
}

.page-about .directory-links__item span {
  font-weight: 400;
  font-size: 0.82rem;
  color: var(--color-text-secondary);
  letter-spacing: 0.04em;
}

.page-about .directory-links__item:hover,
.page-about .directory-links__item:focus-visible {
  border-color: rgba(245, 197, 24, 0.45);
  background: rgba(245, 197, 24, 0.08);
  transform: translateY(-2px);
}

@media (min-width: 640px) {
  .page-about .about-hero {
    padding-top: 56px;
  }

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

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

  .page-about .about-milestones__media {
    max-width: calc(50% + 120px);
  }

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

  .page-about .team-card-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 0;
  }

  .page-about .about-hero__content {
    grid-column: 1 / 8;
    padding-right: clamp(24px, 4vw, 56px);
  }

  .page-about .about-hero__media {
    grid-column: 6 / 13;
    margin-top: 60px;
    aspect-ratio: 4 / 3;
  }

  .page-about .about-layout {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-height) + 24px);
    flex-direction: column;
    align-items: stretch;
    padding: 16px;
  }

  .page-about .about-index__list {
    flex-direction: column;
    gap: 4px;
  }

  .page-about .about-index__list a {
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
  }

  .page-about .about-section {
    padding-top: 64px;
  }

  .page-about .about-milestones__media {
    margin-left: auto;
    transform: translateX(24px);
  }

  .page-about .ecosystem-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 40px;
  }

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

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

  .page-about .team-overview {
    position: sticky;
    top: calc(var(--header-height) + 24px);
  }

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

@media (min-width: 1200px) {
  .page-about .about-hero {
    padding-top: 64px;
  }

  .page-about .about-hero__media {
    margin-top: 80px;
  }

  .page-about .about-milestones__media {
    max-width: 640px;
  }
}