.page-about {
  --about-side-width: 216px;
  --about-accent-glow: rgba(198, 255, 46, 0.12);
  --about-amber-glow: rgba(255, 164, 48, 0.14);
  --about-slice: polygon(0 0, 100% 4%, 96% 100%, 0 96%);
  background: var(--color-bg);
}

.page-about .container {
  width: min(100% - 32px, var(--site-max));
  margin-inline: auto;
}

.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  margin-bottom: 20px;
}

.page-about .breadcrumb-link {
  color: var(--color-muted);
  text-decoration: none;
  transition: color 0.2s;
}

.page-about .breadcrumb-link:hover {
  color: var(--color-accent);
}

.page-about .breadcrumb-sep {
  color: var(--color-muted);
  opacity: 0.5;
}

.page-about .breadcrumb-current {
  color: var(--color-text);
  font-weight: 500;
}

.page-about .about-hero {
  position: relative;
  padding: 40px 0 56px;
  overflow: hidden;
  background:
    linear-gradient(150deg, rgba(16, 33, 61, 0.95) 0%, rgba(8, 13, 25, 0.6) 62%),
    var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.page-about .about-hero-grid-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.35;
  background-image:
    linear-gradient(rgba(245, 247, 250, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245, 247, 250, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at 78% 28%, rgba(0, 0, 0, 0.9) 0%, transparent 68%);
}

.page-about .about-hero-grid-bg::after {
  content: "";
  position: absolute;
  top: -80px;
  right: clamp(0px, 8vw, 120px);
  width: 260px;
  height: 260px;
  border: 1px solid rgba(198, 255, 46, 0.2);
  transform: rotate(24deg);
  animation: about-hero-float 0s linear;
}

.page-about .about-hero-inner {
  position: relative;
  display: grid;
  gap: 32px;
}

.page-about .about-hero-copy {
  min-width: 0;
}

.page-about .about-kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.page-about .about-kicker-dot {
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  clip-path: polygon(0 0, 100% 0, 70% 100%, 0 100%);
}

.page-about .about-title-accent {
  display: block;
  color: var(--color-accent);
  font-style: normal;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(34px, 5vw, 56px);
  font-weight: 500;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin: 0 0 24px;
}

.page-about .about-hero-lead {
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-muted);
  max-width: 620px;
  margin: 0 0 32px;
}

.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  max-width: 620px;
}

.page-about .about-hero-stat {
  padding: 16px 14px;
  background: var(--color-bg-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  transition: transform 0.3s ease, border-color 0.3s;
}

.page-about .about-hero-stat:hover {
  transform: translateY(-2px);
  border-color: rgba(198, 255, 46, 0.4);
}

.page-about .about-hero-stat .data-value {
  display: block;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 4px;
}

.page-about .about-hero-stat .data-label {
  font-family: var(--font-body);
  font-size: 12px;
  line-height: 1.6;
  color: var(--color-muted);
}

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

.page-about .about-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--color-dark);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
}

.page-about .about-hero-figure::before {
  content: "";
  position: absolute;
  top: -12px;
  left: -12px;
  width: 92%;
  height: 100%;
  background: var(--color-accent);
  opacity: 0.06;
  clip-path: var(--about-slice);
  z-index: 0;
  pointer-events: none;
}

.page-about .about-layout {
  display: grid;
  gap: 40px;
  padding: 48px 0 64px;
}

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

.page-about .about-sidenav-inner {
  position: relative;
  padding: 0;
  font-size: 14px;
}

.page-about .about-sidenav-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-muted);
  border-left: 3px solid var(--color-accent);
  padding-left: 12px;
}

.page-about .about-sidenav-list {
  list-style: none;
  margin: 0 0 28px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6px;
}

.page-about .about-sidenav-list li {
  margin: 0;
}

.page-about .about-sidenav-list a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 10px;
  color: var(--color-muted);
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--radius);
  transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.2s;
}

.page-about .about-sidenav-list a:hover,
.page-about .about-sidenav-list a:focus-visible {
  background: rgba(16, 33, 61, 0.65);
  color: var(--color-text);
  border-color: rgba(198, 255, 46, 0.28);
  transform: translateX(2px);
}

.page-about .about-index-num {
  font-size: 12px;
  color: var(--color-accent);
  opacity: 0.7;
}

.page-about .about-sidenav-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-accent);
  font-size: 13px;
  text-decoration: none;
  padding: 8px 0;
  border-bottom: 1px solid rgba(198, 255, 46, 0.24);
  transition: border-color 0.2s, gap 0.2s;
}

.page-about .about-sidenav-link:hover {
  border-color: var(--color-accent);
  gap: 12px;
}

.page-about .about-sidenav-link-arrow {
  font-family: var(--font-mono);
}

.page-about .about-article {
  min-width: 0;
  display: grid;
  gap: 0;
}

.page-about .about-section {
  position: relative;
  padding: 44px 0 48px;
  border-top: 1px solid var(--color-border);
}

.page-about .about-section:first-child {
  border-top: 0;
}

.page-about .about-section::after {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  width: 72px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent) 0%, transparent 100%);
  clip-path: polygon(6% 0, 100% 0, 92% 100%, 0 100%);
  opacity: 0.8;
}

.page-about .about-section-head {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 28px;
}

.page-about .about-chapter-num {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 600;
  color: var(--color-accent);
  line-height: 1;
  padding: 8px 12px;
  background: rgba(198, 255, 46, 0.08);
  border-left: 3px solid var(--color-accent);
  white-space: nowrap;
}

.page-about .about-section-head h2 {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-text);
  margin: 0 0 6px;
}

.page-about .about-section-sub {
  margin: 0;
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.5;
}

.page-about .about-prose {
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-muted);
  max-width: 640px;
}

.page-about .about-prose p {
  margin: 0 0 18px;
}

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

.page-about .about-quote-note {
  margin-top: 28px;
  padding: 20px 20px 20px 24px;
  background: var(--color-bg-2);
  border-radius: var(--radius);
  border-left: 3px solid var(--color-accent-alt);
}

.page-about .about-quote-note .note-text {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text);
  font-style: normal;
}

.page-about .about-timeline {
  display: grid;
  gap: 14px;
  margin-top: 8px;
}

.page-about .about-milestone {
  position: relative;
  border: 1px solid var(--color-border);
  background: var(--color-bg-2);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.3s;
}

.page-about .about-milestone:hover,
.page-about .about-milestone:focus-within {
  border-color: rgba(255, 164, 48, 0.45);
}

.page-about .about-milestone summary {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  line-height: 1.4;
}

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

.page-about .about-milestone-year {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent-alt);
  background: rgba(255, 164, 48, 0.1);
  padding: 5px 10px;
  white-space: nowrap;
  border-radius: var(--radius);
}

.page-about .about-milestone-title {
  color: var(--color-text);
  font-weight: 600;
  flex: 1;
}

.page-about .about-milestone-more {
  font-size: 11px;
  color: var(--color-muted);
  white-space: nowrap;
  opacity: 0.8;
  transition: opacity 0.2s;
}

.page-about .about-milestone[open] .about-milestone-more {
  opacity: 0;
}

.page-about .about-milestone summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--color-accent);
  transition: transform 0.3s;
}

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

.page-about .about-milestone-body {
  padding: 0 24px 20px;
  border-top: 1px solid rgba(245, 247, 250, 0.06);
  margin-left: calc(84px + 18px);
}

.page-about .about-milestone-body p {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-muted);
}

.page-about .about-methods-view {
  margin-top: 32px;
}

.page-about .about-method-steps {
  display: grid;
  gap: 14px;
  margin-top: 32px;
}

.page-about .about-method {
  border-left: 3px solid var(--color-accent);
  background: var(--color-dark);
  border-radius: var(--radius);
  transition: background 0.2s;
}

.page-about .about-method:hover {
  background: #1d2230;
}

.page-about .about-method summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
}

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

.page-about .about-method-step {
  font-size: 12px;
  color: var(--color-accent);
  background: rgba(198, 255, 46, 0.08);
  padding: 3px 8px;
  border-radius: var(--radius);
}

.page-about .about-method-icon {
  margin-left: auto;
  font-size: 20px;
  color: var(--color-accent);
  transition: transform 0.3s;
}

.page-about .about-method[open] .about-method-icon {
  transform: rotate(45deg);
}

.page-about .about-method > p {
  margin: 0;
  padding: 0 24px 20px 66px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-muted);
}

.page-about .about-method-figure {
  margin: 32px 0 0;
  position: relative;
}

.page-about .about-method-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--color-dark);
  border: 1px solid var(--color-border);
}

.page-about .about-team-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 32px;
}

.page-about .about-team-cell {
  position: relative;
  padding: 24px 20px;
  background: var(--color-bg-2);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
  min-width: 0;
  transition: transform 0.3s, border-color 0.3s;
}

.page-about .about-team-cell:hover {
  transform: translateY(-3px);
  border-color: rgba(198, 255, 46, 0.3);
}

.page-about .about-team-cell-main {
  grid-column: 1 / -1;
  background: linear-gradient(145deg, var(--color-bg-2), var(--color-dark));
  border-left: 4px solid var(--color-accent);
}

.page-about .about-team-cell-accent {
  background: linear-gradient(145deg, rgba(255, 164, 48, 0.08), var(--color-bg-2));
  border-left: 4px solid var(--color-accent-alt);
}

.page-about .about-team-cell .data-value {
  display: block;
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 6px;
}

.page-about .about-team-cell-accent .data-value {
  color: var(--color-accent-alt);
}

.page-about .about-team-cell .data-label {
  display: block;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: 12px;
}

.page-about .about-team-cell p {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--color-muted);
}

.page-about .about-ecosystem {
  background: linear-gradient(180deg, transparent, rgba(16, 33, 61, 0.5));
  border-radius: 0;
}

.page-about .about-eco-list {
  display: grid;
  gap: 18px;
  margin-top: 32px;
}

.page-about .about-eco-item {
  display: flex;
  gap: 18px;
  padding: 22px 24px;
  background: var(--color-dark);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color 0.3s, background 0.3s;
}

.page-about .about-eco-item:hover {
  border-color: rgba(198, 255, 46, 0.4);
  background: #1b202b;
}

.page-about .about-eco-index {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-accent);
  background: rgba(198, 255, 46, 0.08);
  border-radius: var(--radius);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.page-about .about-eco-item h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
  margin: 0 0 8px;
}

.page-about .about-eco-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-muted);
}

.page-about .about-eco-figure {
  margin: 32px 0 0;
}

.page-about .about-eco-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--color-dark);
  border: 1px solid var(--color-border);
}

.page-about .about-next-links {
  display: grid;
  gap: 16px;
  padding: 40px 0 72px;
}

.page-about .about-next-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  padding: 24px;
  background: var(--color-bg-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--color-text);
  transition: transform 0.3s, border-color 0.3s;
}

.page-about .about-next-card:hover {
  transform: translateY(-3px);
  border-color: var(--color-accent);
}

.page-about .about-next-title {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.5;
}

.page-about .about-next-arrow {
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--color-accent);
  transition: transform 0.2s;
}

.page-about .about-next-card:hover .about-next-arrow {
  transform: translateX(6px);
}

@keyframes about-eco-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

@media (min-width: 720px) {
  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: center;
    gap: 48px;
  }

  .page-about .about-hero-copy {
    padding-right: 8px;
  }

  .page-about .about-hero-stats {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .about-sidenav-list {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .page-about .about-section {
    padding: 56px 0 64px;
  }

  .page-about .about-section-head {
    align-items: center;
  }

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

  .page-about .about-team-cell-main {
    grid-column: span 2;
  }

  .page-about .about-team-cell-accent {
    grid-column: span 2;
  }

  .page-about .about-eco-list {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .about-eco-item {
    flex-direction: column;
  }

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

@media (min-width: 960px) {
  .page-about .about-hero {
    padding: 72px 0 88px;
  }

  .page-about .about-hero h1 {
    font-size: clamp(48px, 6vw, 66px);
  }

  .page-about .about-hero-lead {
    font-size: 17px;
  }

  .page-about .about-layout {
    grid-template-columns: var(--about-side-width) minmax(0, 1fr);
    align-items: start;
    gap: clamp(40px, 6vw, 88px);
    padding: 72px 0 96px;
  }

  .page-about .about-sidenav-inner {
    position: sticky;
    top: calc(var(--header-h, 60px) + 24px);
    padding-top: 8px;
  }

  .page-about .about-section-head h2 {
    font-size: 30px;
  }

  .page-about .about-chapter-num {
    font-size: 36px;
    padding: 10px 14px;
  }

  .page-about .about-milestone summary {
    padding: 20px 24px;
  }

  .page-about .about-milestone-body {
    padding: 0 32px 24px;
  }

  .page-about .about-ecosystem::before {
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    width: 180px;
    height: 100%;
    background: linear-gradient(180deg, rgba(198, 255, 46, 0.04), transparent 60%);
    clip-path: polygon(30% 0, 100% 0, 100% 100%, 0 100%);
    pointer-events: none;
  }
}

@media (max-width: 719px) {
  .page-about .about-milestone-body {
    margin-left: 0;
    padding: 0 20px 16px;
  }

  .page-about .about-milestone-more {
    display: none;
  }

  .page-about .about-team-cell {
    padding: 18px 16px;
  }

  .page-about .about-team-cell .data-value {
    font-size: 26px;
  }

  .page-about .about-hero-stats {
    grid-template-columns: 1fr 1fr 1fr;
    gap: 10px;
  }

  .page-about .about-hero-stat {
    padding: 12px 10px;
  }

  .page-about .about-hero-stat .data-value {
    font-size: 18px;
  }

  .page-about .about-method > p {
    padding-left: 20px;
  }
}

@media (max-width: 460px) {
  .page-about .about-team-grid {
    grid-template-columns: 1fr;
  }

  .page-about .about-team-cell-main,
  .page-about .about-team-cell-accent {
    grid-column: auto;
  }

  .page-about .about-hero-stats {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .about-hero-stat:first-child {
    grid-column: 1 / -1;
  }

  .page-about .about-eco-item {
    flex-direction: column;
  }
}