.page-about {
  background: var(--space);
  color: var(--cloud);
  padding-top: calc(var(--header-h) + 0.75rem);
  overflow-x: hidden;
  font-family: var(--font-body);
}

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

.page-about .breadcrumb {
  padding: 1.25rem 0 0.25rem;
}

.page-about .about-hero {
  position: relative;
  padding: clamp(2.25rem, 5vw, 4.5rem) 0 2rem;
  background:
    radial-gradient(ellipse 85% 60% at 12% -5%, rgba(177, 78, 255, 0.2), transparent 62%),
    radial-gradient(ellipse 70% 55% at 100% 10%, rgba(57, 255, 136, 0.1), transparent 65%),
    radial-gradient(1px 1px at 8% 18%, rgba(234, 240, 255, 0.7), transparent),
    radial-gradient(1px 1px at 88% 12%, rgba(234, 240, 255, 0.55), transparent),
    radial-gradient(1px 1px at 64% 34%, rgba(57, 255, 136, 0.5), transparent),
    radial-gradient(1px 1px at 30% 60%, rgba(177, 78, 255, 0.5), transparent),
    linear-gradient(180deg, rgba(10, 14, 39, 0.6) 0%, rgba(5, 8, 26, 0.3) 100%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--volt), var(--neon), transparent);
  opacity: 0.75;
}

.page-about .about-hero-grid {
  display: grid;
  gap: 2rem;
}

.page-about .about-hero-topline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
  margin-bottom: 1.25rem;
}

.page-about .about-hero-kicker {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  color: var(--stardust);
  padding-left: 0.875rem;
  border-left: 2px solid var(--volt);
  text-transform: uppercase;
}

.page-about .about-hero h1 {
  margin: 0 0 1rem;
  font-family: var(--font-headline);
  font-size: clamp(2.15rem, 6vw, 4.4rem);
  line-height: 1.12;
  letter-spacing: 0.02em;
  color: var(--cloud);
  font-weight: 800;
}

.page-about .about-h1-sub {
  display: block;
  font-size: clamp(1.15rem, 2.6vw, 1.65rem);
  color: var(--gold);
  font-weight: 500;
  margin-top: 0.5rem;
}

.page-about .about-h1-divider {
  display: none;
}

.page-about .about-hero-sub {
  font-family: var(--font-mono);
  font-size: clamp(0.85rem, 1.8vw, 1rem);
  letter-spacing: 0.08em;
  color: var(--neon);
  margin: 0 0 1.25rem;
  padding-left: 1.5rem;
  position: relative;
}

.page-about .about-hero-sub::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 1rem;
  height: 2px;
  background: var(--neon);
  box-shadow: 0 0 8px rgba(57, 255, 136, 0.55);
}

.page-about .about-hero-desc {
  color: var(--stardust);
  line-height: 1.8;
  font-size: 1rem;
  max-width: 38rem;
  margin: 0 0 1.75rem;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.875rem;
  margin-bottom: 2rem;
}

.page-about .about-hero-index {
  background: var(--panel-bg);
  border: var(--panel-border);
  border-radius: var(--radius);
  padding: 1.25rem 1.25rem 1.5rem;
  backdrop-filter: var(--glass-blur);
  position: relative;
  overflow: hidden;
}

.page-about .about-hero-index::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(to right, var(--volt), transparent 80%);
}

.page-about .about-hero-index-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  color: var(--stardust);
  text-transform: uppercase;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid rgba(177, 78, 255, 0.2);
}

.page-about .about-hero-index-item {
  display: flex;
  align-items: baseline;
  gap: 0.875rem;
  text-decoration: none;
  color: var(--cloud);
  padding: 0.55rem 0.25rem;
  border-radius: 4px;
  transition: background var(--fast), color var(--fast), transform 0.2s var(--ease);
  border-bottom: 1px solid rgba(177, 78, 255, 0.1);
}

.page-about .about-hero-index-item:last-child {
  border-bottom: none;
}

.page-about .about-hero-index-item span {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--volt);
  min-width: 1.75rem;
}

.page-about .about-hero-index-item:hover,
.page-about .about-hero-index-item:focus-visible {
  background: rgba(177, 78, 255, 0.12);
  color: var(--neon);
  outline: none;
  transform: translateX(4px);
}

.page-about .about-hero-stats {
  position: relative;
  margin-top: clamp(2rem, 5vw, 3.5rem);
  border-top: 1px solid rgba(177, 78, 255, 0.18);
  border-bottom: 1px solid rgba(57, 255, 136, 0.18);
  background: rgba(5, 8, 26, 0.45);
  backdrop-filter: var(--glass-blur);
}

.page-about .about-hero-stats-inner {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: rgba(177, 78, 255, 0.12);
}

.page-about .about-hero-stat {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 1rem 0.75rem;
  background: var(--space);
}

.page-about .about-hero-stat .data-number {
  font-size: 1.45rem;
}

.page-about .story-section {
  position: relative;
  padding: clamp(3.5rem, 9vw, 6.5rem) 0;
}

.page-about .story-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  opacity: 0.45;
}

.page-about .about-section-01 {
  background: linear-gradient(180deg, var(--space) 0%, rgba(12, 16, 42, 0.9) 30%, var(--space) 100%);
}

.page-about .about-section-01::before {
  background: linear-gradient(to right, transparent, var(--volt), transparent);
}

.page-about .about-section-02 {
  background: linear-gradient(180deg, var(--space) 0%, rgba(38, 18, 70, 0.35) 40%, rgba(10, 14, 39, 0.95) 100%);
}

.page-about .about-section-02::before {
  background: linear-gradient(to right, transparent, var(--volt), var(--gold), transparent);
}

.page-about .about-section-03 {
  background: linear-gradient(180deg, var(--space) 0%, rgba(5, 34, 26, 0.4) 45%, var(--space) 100%);
}

.page-about .about-section-03::before {
  background: linear-gradient(to right, transparent, var(--neon), var(--volt), transparent);
}

.page-about .about-section-04 {
  background: linear-gradient(180deg, var(--space) 0%, rgba(10, 14, 39, 0.98) 30%, rgba(20, 14, 46, 0.5) 60%, var(--night) 100%);
}

.page-about .about-section-04::before {
  background: linear-gradient(to right, transparent, var(--gold), var(--neon), transparent);
  opacity: 0.3;
}

.page-about .about-section-05 {
  background: linear-gradient(180deg, var(--space) 0%, rgba(40, 28, 12, 0.22) 40%, var(--night) 100%);
}

.page-about .about-section-05::before {
  background: linear-gradient(to right, transparent, var(--gold), var(--volt), transparent);
  opacity: 0.45;
}

.page-about .story-layout {
  display: grid;
  gap: 1.5rem;
}

.page-about .story-number {
  font-family: var(--font-mono);
  font-size: clamp(3.5rem, 10vw, 7rem);
  line-height: 1;
  font-weight: 800;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--volt);
  opacity: 0.75;
  user-select: none;
  position: relative;
}

.page-about .story-number::after {
  content: "";
  display: block;
  width: clamp(2rem, 6vw, 3.5rem);
  height: 3px;
  margin-top: 0.75rem;
  background: linear-gradient(to right, var(--volt), transparent);
  border-radius: 2px;
}

.page-about .story-body {
  background: rgba(234, 240, 255, 0.035);
  border: 1px solid rgba(177, 78, 255, 0.18);
  border-radius: var(--radius);
  padding: clamp(1.25rem, 3.5vw, 2.75rem);
  box-shadow:
    6px 6px 0 rgba(177, 78, 255, 0.1),
    14px 14px 0 rgba(5, 8, 26, 0.35);
  position: relative;
}

.page-about .story-body::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  right: -1px;
  height: 3px;
  background: linear-gradient(to right, var(--volt), var(--gold), var(--neon));
  border-radius: var(--radius) var(--radius) 0 0;
  opacity: 0.6;
}

.page-about .story-body h2 {
  font-family: var(--font-headline);
  font-size: clamp(1.45rem, 3.4vw, 2.4rem);
  font-weight: 700;
  line-height: 1.3;
  margin: 0.5rem 0 1.25rem;
  color: var(--cloud);
}

.page-about .story-text {
  color: var(--stardust);
  line-height: 1.85;
  font-size: 1rem;
}

.page-about .story-text p {
  margin: 0 0 1rem;
}

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

.page-about .about-figure {
  margin: 2rem 0 0;
  border: 1px solid rgba(177, 78, 255, 0.2);
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(5, 8, 26, 0.4);
}

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

.page-about .about-figure figcaption {
  padding: 0.875rem 1.25rem;
  font-size: 0.85rem;
  color: var(--stardust);
  border-top: 1px solid rgba(177, 78, 255, 0.15);
}

.page-about .about-upgrade-grid {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
}

.page-about .about-upgrade-card {
  position: relative;
  background: rgba(10, 14, 39, 0.6);
  border: 1px solid rgba(177, 78, 255, 0.2);
  border-radius: var(--radius-sm);
  padding: 1.25rem 1.25rem 1.25rem 3.5rem;
  transition: border-color var(--fast), transform 0.2s var(--ease), box-shadow var(--fast);
}

.page-about .about-upgrade-card:hover {
  border-color: rgba(57, 255, 136, 0.45);
  box-shadow: var(--neon-glow);
  transform: translateY(-3px);
}

.page-about .about-card-index {
  position: absolute;
  left: 1rem;
  top: 1.25rem;
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 800;
  color: var(--gold);
  opacity: 0.8;
}

.page-about .about-upgrade-card h3 {
  font-family: var(--font-headline);
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
  color: var(--cloud);
}

.page-about .about-upgrade-card p {
  font-size: 0.925rem;
  line-height: 1.7;
  color: var(--stardust);
  margin: 0;
}

.page-about .about-pipeline-steps {
  display: grid;
  gap: 0.875rem;
  margin-top: 2rem;
}

.page-about .pipeline-step {
  position: relative;
  background: rgba(5, 8, 26, 0.55);
  border: 1px solid rgba(57, 255, 136, 0.16);
  border-radius: var(--radius-sm);
  padding: 1.25rem 1.25rem 1.25rem 3.5rem;
  transition: background var(--fast), border-color var(--fast);
}

.page-about .pipeline-step:hover {
  background: rgba(57, 255, 136, 0.06);
  border-color: rgba(57, 255, 136, 0.4);
}

.page-about .pipeline-step-num {
  position: absolute;
  left: 1rem;
  top: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--neon);
  opacity: 0.85;
}

.page-about .pipeline-step h3 {
  font-family: var(--font-headline);
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0 0 0.4rem;
  color: var(--cloud);
}

.page-about .pipeline-step p {
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--stardust);
  margin: 0;
}

.page-about .about-pipeline-figure {
  margin-top: 2.5rem;
}

.page-about .about-milestone-banner {
  margin: 2rem 0 2.5rem;
  border: 1px solid rgba(216, 201, 166, 0.18);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-milestone-banner img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 16 / 5;
}

.page-about .about-timeline {
  position: relative;
  padding-left: 1.5rem;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(to bottom, var(--volt), var(--neon), var(--gold));
  border-radius: 2px;
  opacity: 0.55;
}

.page-about .about-milestone {
  position: relative;
  margin-bottom: 1.5rem;
}

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

.page-about .about-milestone-marker {
  position: absolute;
  left: -1.5rem;
  top: 1.5rem;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--space);
  border: 2px solid var(--neon);
  box-shadow: 0 0 10px rgba(57, 255, 136, 0.4);
}

.page-about .about-milestone-marker::after {
  content: "";
  position: absolute;
  inset: 2px;
  border-radius: 50%;
  background: var(--neon);
  opacity: 0.7;
}

.page-about .about-milestone-card {
  background: rgba(10, 14, 39, 0.62);
  border: 1px solid rgba(177, 78, 255, 0.18);
  border-radius: var(--radius-sm);
  padding: 1.25rem;
  transition: border-color var(--fast), box-shadow var(--fast);
}

.page-about .about-milestone-card:hover {
  border-color: rgba(255, 215, 106, 0.45);
  box-shadow: var(--gold-glow);
}

.page-about .about-milestone-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.6rem;
}

.page-about .about-milestone-version {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--gold);
  background: rgba(255, 215, 106, 0.08);
  border: 1px solid rgba(255, 215, 106, 0.22);
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
}

.page-about .about-milestone-period {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--stardust);
}

.page-about .about-milestone-card h3 {
  font-family: var(--font-headline);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--cloud);
  margin: 0 0 0.4rem;
}

.page-about .about-milestone-card > p {
  font-size: 0.925rem;
  color: var(--stardust);
  line-height: 1.7;
  margin: 0 0 0.75rem;
}

.page-about .about-milestone-more {
  margin-top: 0.25rem;
  font-size: 0.875rem;
  color: var(--stardust);
}

.page-about .about-milestone-more summary {
  cursor: pointer;
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--neon);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  transition: color var(--fast);
  padding: 0.4rem 0;
}

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

.page-about .about-milestone-more summary::before {
  content: "+";
  display: inline-block;
  color: var(--neon);
  font-weight: 800;
  font-size: 1rem;
  line-height: 1;
  transition: transform 0.25s var(--ease);
}

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

.page-about .about-milestone-more summary:hover,
.page-about .about-milestone-more summary:focus-visible {
  color: var(--gold);
  outline: none;
}

.page-about .about-milestone-more p {
  margin: 0.5rem 0 0;
  padding-left: 0.9rem;
  border-left: 2px solid rgba(57, 255, 136, 0.35);
  line-height: 1.7;
}

.page-about .about-principles {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
}

.page-about .about-principle {
  position: relative;
  background: rgba(234, 240, 255, 0.04);
  border: 1px solid rgba(255, 215, 106, 0.14);
  border-radius: var(--radius-sm);
  padding: 1.5rem 1.25rem 1.25rem 3.5rem;
  overflow: hidden;
  transition: border-color var(--fast), background var(--fast);
}

.page-about .about-principle::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(to bottom, var(--gold), transparent);
  opacity: 0.5;
}

.page-about .about-principle:hover {
  border-color: rgba(255, 215, 106, 0.4);
  background: rgba(255, 215, 106, 0.04);
}

.page-about .about-principle-no {
  position: absolute;
  left: 1rem;
  top: 1.35rem;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 0.9rem;
  color: var(--gold);
  opacity: 0.8;
}

.page-about .about-principle h3 {
  font-family: var(--font-headline);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--cloud);
  margin: 0 0 0.5rem;
}

.page-about .about-principle p {
  font-size: 0.925rem;
  color: var(--stardust);
  line-height: 1.75;
  margin: 0;
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.875rem;
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(177, 78, 255, 0.18);
}

.page-about .about-trust {
  background: var(--night);
  border-top: 1px solid rgba(177, 78, 255, 0.16);
  padding: 2rem 0;
}

.page-about .about-trust-inner {
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-about .about-trust p {
  color: var(--lavender);
  font-size: 0.85rem;
  line-height: 1.8;
  text-align: center;
  max-width: 45rem;
  margin: 0;
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

@media (min-width: 768px) {
  .page-about .about-hero-stats-inner {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-hero-stat {
    padding: 1.25rem 1rem;
  }

  .page-about .about-upgrade-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
  }

  .page-about .about-pipeline-steps {
    grid-template-columns: repeat(4, 1fr);
    gap: 1.25rem;
  }

  .page-about .pipeline-step {
    padding: 1.5rem 1.25rem 1.25rem;
    text-align: left;
  }

  .page-about .pipeline-step-num {
    position: static;
    display: inline-block;
    font-size: 0.85rem;
    margin-bottom: 0.75rem;
    color: var(--neon);
  }

  .page-about .about-principles {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }

  .page-about .about-trust-inner {
    justify-content: flex-start;
  }

  .page-about .about-trust p {
    text-align: left;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(260px, 360px);
    gap: clamp(3rem, 7vw, 6rem);
    align-items: start;
    padding-top: 1rem;
  }

  .page-about .about-hero-index {
    margin-top: 0.5rem;
    position: sticky;
    top: calc(var(--header-h) + 1.5rem);
  }

  .page-about .story-layout {
    grid-template-columns: clamp(110px, 12vw, 155px) minmax(0, 1fr);
    gap: clamp(1.5rem, 4vw, 3.5rem);
    align-items: start;
  }

  .page-about .story-number {
    position: sticky;
    top: calc(var(--header-h) + 2.5rem);
    font-size: clamp(4rem, 8vw, 7rem);
  }

  .page-about .about-milestone {
    padding-left: 2.5rem;
  }

  .page-about .about-milestone-marker {
    left: -1.7rem;
  }
}