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

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 36px 0 56px;
  background: var(--gradient-live);
  color: var(--text-on-green);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(115deg, transparent 34%, rgba(232, 184, 69, 0.22) 35%, transparent 48%),
    linear-gradient(70deg, transparent 68%, rgba(255, 255, 255, 0.07) 69%, transparent 88%);
  transform: skewY(-3deg);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -60px;
  bottom: -80px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: var(--gradient-gold);
  opacity: 0.14;
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .crumb-link,
.page-about .about-hero .crumb-current {
  color: rgba(240, 245, 241, 0.86);
}

.page-about .about-hero .crumb-link {
  text-underline-offset: 4px;
}

.page-about .about-hero .crumb-sep {
  color: var(--gold);
}

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

.page-about .about-hero__kicker {
  display: inline-block;
  margin-top: 28px;
  padding: 6px 14px;
  border: 1px solid rgba(232, 184, 69, 0.5);
  border-radius: var(--radius-pill);
  background: rgba(232, 184, 69, 0.14);
  color: var(--gold);
  font-family: var(--font-headline);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.page-about .about-hero__title {
  margin: 16px 0 12px;
  color: var(--text-on-green);
  font-family: var(--font-headline);
  font-size: clamp(2.1rem, 7vw, 3.2rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.5px;
}

.page-about .about-hero__desc {
  max-width: 60ch;
  margin: 0 0 20px;
  color: var(--text-on-green);
  opacity: 0.9;
}

.page-about .about-hero__badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-hero__badge {
  padding: 6px 14px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-on-green);
  font-size: 0.82rem;
  font-weight: 600;
}

.page-about .about-hero__stat {
  display: inline-block;
  min-width: 200px;
  margin-top: 28px;
  padding: 20px 24px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.08);
}

.page-about .about-hero__stat-number {
  display: block;
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 1;
}

.page-about .about-hero__stat-label {
  display: block;
  margin-top: 8px;
  color: var(--text-on-green);
  font-size: 0.88rem;
  opacity: 0.85;
}

.page-about .about-layout {
  display: block;
  padding: 32px 0 64px;
}

.page-about .about-directory {
  margin-bottom: 28px;
}

.page-about .about-directory__card {
  padding: 24px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  background: var(--bg-white);
}

.page-about .about-directory__label {
  margin: 0 0 16px;
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
}

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

.page-about .about-directory__nav .chapter-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  color: var(--text-dark);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  transition: background 0.2s, color 0.2s;
}

.page-about .about-directory__nav .chapter-link:hover {
  background: var(--bg-light);
}

.page-about .about-directory__nav .chapter-link.is-active {
  background: var(--green-deep);
  color: var(--gold);
}

.page-about .about-directory__num {
  flex: 0 0 26px;
  color: var(--gold-deep);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.page-about .about-directory__nav .chapter-link.is-active .about-directory__num {
  color: var(--gold);
}

.page-about .about-directory__actions {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}

.page-about .about-directory__actions .btn {
  flex: 1;
  justify-content: center;
}

.page-about .about-section {
  padding: 36px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-section:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .about-section__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 24px;
}

.page-about .about-section__head .index-number {
  margin-top: 4px;
  color: var(--gold-deep);
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
}

.page-about .about-section__head .section-title {
  margin: 0;
}

.page-about .about-section__head .section-subtitle {
  margin: 4px 0 0;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.page-about .about-subheading {
  margin: 0 0 16px;
  color: var(--text-dark);
  font-family: var(--font-headline);
  font-size: 1.1rem;
  font-weight: 700;
}

.page-about .position-intro {
  margin-bottom: 24px;
  padding: 28px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  background: var(--bg-white);
}

.page-about .position-intro .content-lead {
  margin: 0;
  color: var(--text-dark);
  font-size: 1.2rem;
  font-weight: 600;
  line-height: 1.55;
}

.page-about .position-intro .content-paragraph {
  margin: 16px 0 0;
  color: var(--text-muted);
  line-height: 1.7;
}

.page-about .position-media {
  aspect-ratio: 2 / 1;
  min-height: 180px;
  margin-bottom: 24px;
  overflow: hidden;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
}

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

.page-about .position-scenes {
  padding: 24px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  background: var(--bg-white);
}

.page-about .scene-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .scene-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  background: var(--bg-light);
  color: var(--text-dark);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 600;
  line-height: 1.4;
  transition: border-color 0.2s, background 0.2s, transform 0.2s;
}

.page-about .scene-item:hover {
  border-color: var(--gold);
  background: var(--bg-white);
  transform: translateY(-2px);
}

.page-about .scene-item__icon {
  position: relative;
  flex: 0 0 26px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--gradient-live);
}

.page-about .scene-item__icon::after {
  content: "";
  position: absolute;
  top: 8px;
  left: 8px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gold);
}

.page-about .scene-item__text {
  flex: 1;
  min-width: 0;
}

.page-about .scene-item__arrow {
  color: var(--gold-deep);
  font-weight: 700;
}

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

.page-about .timeline {
  position: relative;
  display: grid;
  gap: 4px;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  top: 10px;
  bottom: 10px;
  left: 9px;
  width: 3px;
  border-radius: var(--radius-pill);
  background: linear-gradient(var(--gold), var(--green-mid) 65%, var(--line-soft));
}

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

.page-about .timeline-item__summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 10px;
  padding: 12px 0;
  cursor: pointer;
  list-style: none;
}

.page-about .timeline-item__summary::-webkit-details-marker {
  display: none;
}

.page-about .timeline-item__dot {
  position: absolute;
  top: 18px;
  left: 2px;
  width: 17px;
  height: 17px;
  border: 3px solid var(--bg-white);
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 2px var(--green-mid);
}

.page-about .timeline-item__time {
  min-width: 46px;
  color: var(--gold-deep);
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
}

.page-about .timeline-item__title {
  margin: 0;
  color: var(--text-dark);
  font-family: var(--font-headline);
  font-size: 1.02rem;
  font-weight: 700;
}

.page-about .timeline-item__toggle {
  margin-left: auto;
  color: var(--text-muted);
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1;
  transition: transform 0.2s;
}

.page-about .timeline-item[open] .timeline-item__toggle {
  transform: rotate(45deg);
}

.page-about .timeline-item__detail {
  margin: 2px 0 12px 24px;
  padding: 14px 16px;
  border-left: 3px solid var(--gold);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: var(--bg-white);
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.7;
}

.page-about .timeline-item__detail p {
  margin: 0;
}

.page-about .milestone-chart__media {
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
}

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

.page-about .milestone-chart__note {
  margin: 12px 0 0;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-align: right;
  letter-spacing: 0.08em;
}

.page-about .capability-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-bottom: 28px;
}

.page-about .capability-stat {
  position: relative;
  overflow: hidden;
  padding: 20px 16px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  background: var(--bg-white);
}

.page-about .capability-stat::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 3px;
  background: var(--gradient-gold);
}

.page-about .capability-stat .stat-number {
  display: block;
  color: var(--green-deep);
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 6vw, 2rem);
  font-weight: 700;
  line-height: 1.15;
}

.page-about .capability-stat__label {
  display: block;
  margin-top: 8px;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.page-about .capability-main {
  position: relative;
  overflow: hidden;
  padding: 28px;
  border-radius: var(--radius-lg);
  background: var(--gradient-live);
  color: var(--text-on-green);
}

.page-about .capability-main::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(232, 184, 69, 0.22), transparent 70%);
  pointer-events: none;
}

.page-about .capability-tech {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-bottom: 28px;
}

.page-about .capability-tech__media {
  aspect-ratio: 5 / 3;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-md);
}

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

.page-about .capability-tech__desc .about-subheading {
  color: var(--gold);
}

.page-about .capability-tech__desc p {
  margin: 10px 0 0;
  color: var(--text-on-green);
  font-size: 0.94rem;
  line-height: 1.7;
  opacity: 0.9;
}

.page-about .capability-list {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .capability-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px;
  border-left: 3px solid var(--gold);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.08);
}

.page-about .capability-item__num {
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
}

.page-about .capability-item p {
  margin: 0;
  color: var(--text-on-green);
  font-size: 0.9rem;
  font-weight: 600;
}

.page-about .capability-update {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-top: 16px;
  padding: 16px;
  border: 1px dashed rgba(232, 184, 69, 0.4);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.06);
}

.page-about .capability-update__tag {
  flex: 0 0 auto;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: var(--gold);
  color: var(--green-deep);
  font-size: 0.75rem;
  font-weight: 700;
}

.page-about .capability-update p {
  margin: 2px 0 0;
  color: var(--text-on-green);
  font-size: 0.9rem;
  line-height: 1.6;
  opacity: 0.9;
}

.page-about .promise-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

.page-about .promise-card {
  position: relative;
  padding: 24px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  background: var(--bg-white);
}

.page-about .promise-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 24px;
  left: 24px;
  height: 3px;
  border-radius: var(--radius-pill);
  background: var(--gradient-gold);
}

.page-about .promise-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-bottom: 14px;
  border-radius: 14px;
  background: var(--gradient-live);
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
}

.page-about .promise-card__title {
  margin: 0 0 8px;
  color: var(--text-dark);
  font-family: var(--font-headline);
  font-size: 1.1rem;
  font-weight: 700;
}

.page-about .promise-card__text {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.65;
}

.page-about .promise-contact {
  padding: 28px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  background: var(--bg-white);
}

.page-about .promise-contact__intro {
  max-width: 75ch;
  margin: 0 0 20px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.page-about .promise-contact__list {
  display: grid;
  grid-template-columns: 1fr;
  margin: 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .promise-contact__row {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .promise-contact__row dt {
  flex: 0 0 64px;
  color: var(--green-deep);
  font-size: 0.85rem;
  font-weight: 700;
}

.page-about .promise-contact__row dd {
  margin: 0;
  color: var(--text-dark);
  font-size: 0.9rem;
  font-weight: 500;
  word-break: break-all;
}

.page-about .promise-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.page-about .promise-contact__actions .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

@media (min-width: 600px) {
  .page-about .scene-list {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .capability-list {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 44px 0 68px;
  }

  .page-about .about-hero__grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 40px;
    align-items: end;
  }

  .page-about .about-hero__stat {
    margin-top: 0;
  }

  .page-about .capability-tech {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: center;
  }

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

  .page-about .promise-contact__list {
    grid-template-columns: 1fr 1fr;
    column-gap: 24px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-layout {
    display: grid;
    grid-template-columns: 280px minmax(0, 1fr);
    gap: 48px;
    align-items: start;
    padding-top: 48px;
  }

  .page-about .about-directory {
    position: sticky;
    top: calc(var(--header-height) + 24px);
    margin-bottom: 0;
  }

  .page-about .about-section {
    padding: 44px 0;
  }

  .page-about .milestone-wrap {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 40px;
  }

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

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