.page-about {
  overflow-x: clip;
  color: var(--stk-ink);
  font-family: var(--stk-font);
}

.page-about .stk-breadcrumb {
  margin-top: 20px;
  font-family: var(--stk-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--stk-muted);
}

.page-about .stk-breadcrumb a {
  color: var(--stk-ice);
  text-decoration: none;
}

.page-about .stk-breadcrumb a:hover,
.page-about .stk-breadcrumb a:focus {
  color: var(--stk-neon);
  text-decoration: underline;
}

.page-about .markdown-body {
  display: none;
}

.page-about .profile-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 52px);
  align-items: center;
  position: relative;
  padding-top: clamp(32px, 6vw, 72px);
  padding-bottom: clamp(40px, 6vw, 88px);
}

.page-about .profile-hero__kicker,
.page-about .section-meta {
  margin: 0 0 18px;
  font-family: var(--stk-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--stk-neon);
}

.page-about .profile-hero h1 {
  margin: 0 0 22px;
  font-size: clamp(30px, 4.6vw, 56px);
  font-weight: 700;
  line-height: 1.14;
  letter-spacing: -0.03em;
}

.page-about .profile-hero__lead {
  margin: 0 0 16px;
  color: var(--stk-muted);
  font-size: clamp(15px, 1.4vw, 18px);
  line-height: 1.85;
}

.page-about .profile-hero__note {
  margin: 0 0 28px;
  color: var(--stk-ice);
  font-size: 14px;
  line-height: 1.75;
}

.page-about .profile-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 28px;
  padding-top: 20px;
  border-top: 1px solid var(--stk-line);
}

.page-about .hero-stat {
  flex: 1 1 120px;
}

.page-about .hero-stat__num {
  display: block;
  font-family: var(--stk-mono);
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--stk-neon);
}

.page-about .hero-stat__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: var(--stk-muted);
}

.page-about .profile-hero__media {
  position: relative;
}

.page-about .profile-hero__media::before {
  content: '';
  position: absolute;
  inset: 8px -8px -8px 8px;
  border: 1px solid rgba(0, 255, 156, 0.45);
  clip-path: polygon(0 0, 90% 0, 100% 10%, 100% 100%, 10% 100%, 0 90%);
  z-index: 0;
  pointer-events: none;
}

.page-about .profile-hero__img {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--stk-line);
  background: var(--stk-bg-raised);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
}

.page-about .milestones {
  padding-top: clamp(48px, 6vw, 96px);
  padding-bottom: clamp(56px, 7vw, 112px);
  border-top: 1px solid var(--stk-line);
}

.page-about .milestones h2,
.page-about .data-accumulation h2,
.page-about .service-ecosystem h2 {
  margin: 0 0 12px;
  font-size: clamp(26px, 3.4vw, 42px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.page-about .milestones__intro,
.page-about .data-accumulation__intro,
.page-about .service-ecosystem__intro {
  max-width: 640px;
  margin: 0 0 44px;
  color: var(--stk-muted);
  font-size: 15px;
  line-height: 1.75;
}

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

.page-about .timeline-item {
  position: relative;
  padding: 0 0 44px 36px;
}

.page-about .timeline-item:last-child {
  padding-bottom: 4px;
}

.page-about .timeline-item::before {
  content: '';
  position: absolute;
  top: 4px;
  left: 0;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--stk-neon);
  box-shadow: 0 0 0 4px rgba(0, 255, 156, 0.15);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.page-about .timeline-item:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 22px;
  left: 6px;
  width: 2px;
  bottom: 0;
  background-image: linear-gradient(to bottom, var(--stk-line) 50%, transparent 50%);
  background-size: 2px 10px;
}

.page-about .timeline-item:hover::before,
.page-about .timeline-item:focus-within::before {
  box-shadow: 0 0 0 8px rgba(0, 255, 156, 0.18);
  transform: scale(1.08);
}

.page-about .timeline-item__year {
  display: inline-block;
  padding: 4px 10px;
  margin-bottom: 10px;
  font-family: var(--stk-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--stk-ice);
  background: var(--stk-bg-raised);
  border: 1px solid var(--stk-line);
  transition: border-color 0.3s ease, color 0.3s ease, background-color 0.3s ease;
}

.page-about .timeline-item:hover .timeline-item__year,
.page-about .timeline-item:focus-within .timeline-item__year {
  border-color: var(--stk-neon);
  color: var(--stk-neon);
  background: rgba(0, 255, 156, 0.08);
}

.page-about .timeline-item__body {
  transition: background-color 0.3s ease;
}

.page-about .timeline-item:hover .timeline-item__body,
.page-about .timeline-item:focus-within .timeline-item__body {
  background: linear-gradient(90deg, rgba(0, 255, 156, 0.05), transparent 70%);
}

.page-about .timeline-item__body h3 {
  margin: 0 0 8px;
  font-size: clamp(19px, 2vw, 24px);
  line-height: 1.3;
}

.page-about .timeline-item__body p {
  margin: 0;
  max-width: 60ch;
  color: var(--stk-muted);
  font-size: 14px;
  line-height: 1.7;
}

.page-about .data-accumulation {
  position: relative;
  padding-top: clamp(48px, 6vw, 96px);
  padding-bottom: clamp(56px, 7vw, 112px);
  border-top: 1px solid var(--stk-line);
}

.page-about .data-accumulation::after {
  content: '';
  position: absolute;
  top: 60px;
  right: -50px;
  width: 180px;
  height: 180px;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.14), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.page-about .data-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
}

.page-about .data-cell {
  padding: 26px 0;
  border-bottom: 1px solid var(--stk-line);
}

.page-about .data-cell__num {
  display: block;
  font-family: var(--stk-mono);
  font-size: clamp(28px, 3.6vw, 46px);
  font-weight: 700;
  line-height: 1;
  color: var(--stk-neon);
}

.page-about .data-cell__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: var(--stk-muted);
}

.page-about .data-accumulation__figure {
  position: relative;
  z-index: 1;
  margin: 48px 0 0;
}

.page-about .data-accumulation__figure img,
.page-about .workflow-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--stk-line);
  background: var(--stk-bg-raised);
}

.page-about .data-accumulation__figure figcaption,
.page-about .workflow-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--stk-muted);
}

.page-about .service-ecosystem {
  position: relative;
  padding-top: clamp(48px, 6vw, 96px);
  padding-bottom: clamp(56px, 7vw, 112px);
  border-top: 1px solid var(--stk-line);
}

.page-about .services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.page-about .service-block {
  padding: 32px 0;
  border-bottom: 1px solid var(--stk-line);
}

.page-about .service-block__index {
  display: block;
  margin-bottom: 12px;
  font-family: var(--stk-mono);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--stk-neon);
}

.page-about .service-block h3 {
  margin: 0 0 10px;
  font-size: clamp(19px, 2vw, 26px);
  line-height: 1.3;
}

.page-about .service-block p {
  margin: 0 0 20px;
  max-width: 52ch;
  color: var(--stk-muted);
  font-size: 14px;
  line-height: 1.7;
}

.page-about .service-block .stk-btn {
  margin-top: 4px;
}

.page-about .workflow-figure {
  margin-top: 48px;
}

@media (min-width: 640px) {
  .page-about .data-grid {
    grid-template-columns: 1fr 1fr;
    column-gap: 48px;
  }
}

@media (min-width: 900px) {
  .page-about .profile-hero {
    grid-template-columns: 1.1fr 0.9fr;
    min-height: calc(100vh - var(--stk-header-h));
  }

  .page-about .profile-hero__media::before {
    inset: 12px -12px -12px 12px;
  }

  .page-about .milestones {
    padding-top: clamp(64px, 8vw, 128px);
    padding-bottom: clamp(80px, 10vw, 160px);
  }
}

@media (min-width: 1080px) {
  .page-about .services-grid {
    grid-template-columns: 1fr 1fr;
    column-gap: 64px;
  }

  .page-about .service-block {
    padding: 40px 0;
  }

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

  .page-about .workflow-figure {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(240px, 0.3fr);
    gap: 40px;
    align-items: start;
    margin-top: 72px;
  }

  .page-about .workflow-figure figcaption {
    margin-top: 2px;
    padding-top: 2px;
  }

  .page-about .data-accumulation__figure {
    margin-top: 72px;
  }
}