.page-about {
  --about-glow: rgba(0, 255, 136, 0.07);
  --about-glow-orange: rgba(255, 106, 0, 0.09);
  background:
    radial-gradient(900px 420px at 85% 0%, var(--about-glow), transparent 65%),
    radial-gradient(720px 320px at 6% 34%, var(--about-glow-orange), transparent 60%),
    linear-gradient(rgba(30, 42, 74, 0.42) 1px, transparent 1px) 0 22px / 100% 44px,
    var(--deep-night);
  color: var(--text-white);
  font-family: var(--font-body);
}

.page-about .about-shell {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 20px;
}

.page-about .breadcrumb {
  margin-bottom: 26px;
}

.page-about .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12px;
}

.page-about .breadcrumb-list li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--text-dim);
}

.page-about .breadcrumb-list a {
  color: var(--fluorescent-green);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.page-about .breadcrumb-list a:hover {
  border-color: var(--fluorescent-green);
}

.page-about .breadcrumb-list [aria-current="page"] {
  color: var(--text-dim);
}

.page-about .about-hero {
  position: relative;
  padding: 30px 0 36px;
  border-bottom: 1px solid var(--line-light);
  margin-bottom: 64px;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 96px;
  height: 3px;
  background: var(--fluorescent-green);
}

.page-about .about-hero-kicker {
  color: var(--fluorescent-green);
}

.page-about .about-hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(30px, 4.4vw, 52px);
  line-height: 1.06;
  letter-spacing: 0.01em;
  margin: 14px 0 20px;
  max-width: 14em;
  text-shadow: 0 0 30px rgba(0, 255, 136, 0.12);
}

.page-about .about-hero .page-lead {
  color: var(--text-dim);
  font-size: 16px;
  line-height: 1.85;
  max-width: 58em;
}

.page-about .section-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--alert-orange);
}

.page-about .section-label::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--alert-orange);
}

.page-about h2 {
  font-family: var(--font-heading);
  font-size: clamp(24px, 3vw, 36px);
  line-height: 1.14;
  letter-spacing: 0.01em;
  margin: 12px 0 16px;
}

.page-about .about-lead-text {
  color: var(--text-dim);
  font-size: 16px;
  line-height: 1.8;
  max-width: 58em;
}

.page-about .about-positioning {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  margin-bottom: 92px;
}

.page-about .about-mission {
  list-style: none;
  margin: 24px 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-mission li {
  display: flex;
  gap: 14px;
  padding: 16px;
  background: var(--night-blue);
  border: 1px solid var(--line-light);
  border-left: 2px solid var(--fluorescent-green);
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.page-about .about-mission li:hover {
  border-left-color: var(--alert-orange);
  transform: translateX(3px);
}

.page-about .mission-num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--alert-orange);
  padding-top: 2px;
}

.page-about .about-mission strong {
  display: block;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 4px;
}

.page-about .about-mission p {
  margin: 0;
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.7;
}

.page-about .about-keyword-note {
  margin-top: 22px;
  border-left: 3px solid var(--alert-orange);
  padding: 6px 0 6px 16px;
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.8;
}

.page-about .about-keyword-note strong {
  color: var(--text-white);
  font-weight: 700;
}

.page-about .about-positioning-figure {
  position: relative;
  margin: 0;
  padding: 10px;
  background: var(--abyss);
  border: 1px solid var(--line-light);
  transform: rotate(-1deg);
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.page-about .about-positioning-figure:hover {
  transform: rotate(0deg) translateY(-4px);
  border-color: var(--fluorescent-green);
}

.page-about .about-positioning-figure::after {
  content: attr(data-frame-label);
  position: absolute;
  top: 18px;
  left: 18px;
  z-index: 1;
  pointer-events: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--text-white);
  background: rgba(7, 10, 26, 0.78);
  padding: 5px 9px;
  border-left: 2px solid var(--fluorescent-green);
}

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

.page-about .about-timeline {
  position: relative;
  margin-bottom: 96px;
  padding-top: 8px;
}

.page-about .about-timeline-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.16;
  pointer-events: none;
}

.page-about .about-timeline-head,
.page-about .about-timeline-list {
  position: relative;
  z-index: 1;
}

.page-about .about-timeline-list {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline-list::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--fluorescent-green), var(--line-light) 82%);
}

.page-about .timeline-item {
  position: relative;
  padding-left: 48px;
  padding-bottom: 34px;
}

.page-about .timeline-marker {
  position: absolute;
  left: 9px;
  top: 26px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--abyss);
  border: 2px solid var(--fluorescent-green);
  box-shadow: 0 0 0 5px rgba(0, 255, 136, 0.08);
  z-index: 1;
  transition: background 0.25s ease, box-shadow 0.25s ease;
}

.page-about .timeline-card {
  background: var(--night-blue);
  border: 1px solid var(--line-light);
  border-left: 2px solid rgba(0, 255, 136, 0.5);
  padding: 18px 18px 20px;
  transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}

.page-about .timeline-card .timeline-year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--alert-orange);
  margin-bottom: 10px;
}

.page-about .timeline-card h3 {
  font-family: var(--font-heading);
  font-size: 18px;
  line-height: 1.35;
  margin: 0 0 10px;
}

.page-about .timeline-card p {
  margin: 0;
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.75;
}

.page-about .timeline-card p strong {
  color: var(--text-white);
}

.page-about .timeline-item:hover .timeline-marker {
  background: var(--fluorescent-green);
  box-shadow: 0 0 0 7px rgba(0, 255, 136, 0.16);
}

.page-about .timeline-item:hover .timeline-card {
  border-color: var(--fluorescent-green);
  box-shadow: 0 10px 30px rgba(0, 255, 136, 0.07);
  transform: translateX(4px);
}

.page-about .about-data {
  margin-bottom: 88px;
  padding-top: 56px;
  padding-bottom: 64px;
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
  padding-left: calc(50vw - 50% + 20px);
  padding-right: calc(50vw - 50% + 20px);
  background: linear-gradient(180deg, rgba(17, 23, 48, 0.62), rgba(7, 10, 26, 0.3)), var(--deep-night);
  border-top: 1px solid var(--line-light);
  border-bottom: 1px solid var(--line-light);
}

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

.page-about .data-inline-card {
  position: relative;
  overflow: hidden;
  padding: 20px 16px 18px;
  background: var(--deep-night);
  border: 1px solid var(--line-light);
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.page-about .data-inline-card::after {
  content: "";
  position: absolute;
  right: -14px;
  bottom: -14px;
  width: 34px;
  height: 34px;
  border: 1px solid rgba(0, 255, 136, 0.35);
  transform: rotate(45deg);
  transition: border-color 0.25s ease;
}

.page-about .data-inline-card:hover {
  border-color: var(--fluorescent-green);
  transform: translateY(-4px);
}

.page-about .data-inline-card:hover::after {
  border-color: var(--alert-orange);
}

.page-about .data-inline-card .data-stat {
  display: block;
  font-family: var(--font-mono);
  font-size: 34px;
  line-height: 1;
  color: var(--fluorescent-green);
  margin-bottom: 9px;
}

.page-about .data-inline-card .data-stat sup {
  font-size: 0.6em;
}

.page-about .data-inline-card .data-stat-label {
  display: block;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-dim);
  letter-spacing: 0.03em;
}

.page-about .about-data-map {
  position: relative;
  margin: 28px 0 0;
  padding: 8px;
  background: var(--abyss);
  border: 1px solid var(--line-light);
}

.page-about .about-data-map::after {
  content: attr(data-frame-label);
  position: absolute;
  top: 18px;
  left: 18px;
  z-index: 1;
  pointer-events: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  background: rgba(7, 10, 26, 0.82);
  color: var(--text-white);
  padding: 5px 9px;
  border-left: 2px solid var(--alert-orange);
}

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

.page-about .about-data-features {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 20px;
}

.page-about .about-data-features .card {
  background: var(--night-blue);
  border: 1px solid var(--line-light);
  border-top: 3px solid var(--alert-orange);
  padding: 22px;
  transition: background 0.25s ease, border-color 0.25s ease;
}

.page-about .about-data-features .card:hover {
  background: rgba(255, 106, 0, 0.08);
  border-color: var(--alert-orange);
}

.page-about .about-data-features .card h3 {
  font-family: var(--font-heading);
  font-size: 17px;
  margin: 0 0 10px;
}

.page-about .about-data-features .card p {
  margin: 0;
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.75;
}

.page-about .about-data-features .card p strong {
  color: var(--text-white);
}

.page-about .about-tech {
  margin-bottom: 88px;
}

.page-about .about-tech-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 32px 0;
}

.page-about .tech-step {
  position: relative;
  padding: 26px 20px 24px;
  background: var(--night-blue);
  border: 1px solid var(--line-light);
  border-right: 2px solid var(--fluorescent-green);
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.page-about .tech-step:hover {
  transform: translateY(-5px);
  border-color: var(--fluorescent-green);
}

.page-about .tech-step-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 22px;
  color: var(--fluorescent-green);
  margin-bottom: 12px;
}

.page-about .tech-step h3 {
  font-family: var(--font-heading);
  font-size: 18px;
  margin: 0 0 10px;
}

.page-about .tech-step p {
  margin: 0;
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.75;
}

.page-about .about-tech-bottom {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 22px;
}

.page-about .about-cert,
.page-about .about-partners {
  display: flex;
  gap: 18px;
  align-items: center;
  padding: 18px;
  background: var(--abyss);
  border: 1px solid var(--line-light);
}

.page-about .cert-badge {
  flex: none;
  width: 72px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.2;
  text-align: center;
  color: var(--deep-night);
  background: linear-gradient(135deg, var(--fluorescent-green), rgba(0, 255, 136, 0.35));
  border: 1px solid var(--fluorescent-green);
  border-radius: 50%;
}

.page-about .about-cert p,
.page-about .about-partners p {
  margin: 0;
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.7;
}

.page-about .about-tech-chart {
  margin-top: 20px;
  padding: 16px 12px 8px;
  background: var(--abyss);
  border: 1px solid var(--line-light);
}

.page-about .about-tech-chart svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-tech-chart .chart-grid line {
  stroke: var(--line-light);
  stroke-width: 1;
  stroke-dasharray: 3 4;
}

.page-about .about-tech-chart .chart-area {
  fill: rgba(0, 255, 136, 0.1);
}

.page-about .about-tech-chart .chart-line {
  fill: none;
  stroke: var(--fluorescent-green);
  stroke-width: 2.5;
  stroke-linecap: round;
}

.page-about .about-team {
  margin-bottom: 72px;
}

.page-about .about-team-roles {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 32px;
}

.page-about .team-role {
  position: relative;
  padding: 24px 20px;
  background: var(--night-blue);
  border: 1px solid var(--line-light);
  border-radius: 2px;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.page-about .team-role:hover {
  border-color: var(--fluorescent-green);
  transform: translateY(-4px);
}

.page-about .team-role-index {
  display: block;
  font-family: var(--font-heading);
  font-size: 42px;
  line-height: 1;
  margin-bottom: 14px;
  color: rgba(160, 168, 192, 0.3);
  -webkit-text-stroke: 1px var(--line-light);
  transition: color 0.25s ease, -webkit-text-stroke-color 0.25s ease;
}

.page-about .team-role:hover .team-role-index {
  -webkit-text-stroke-color: var(--alert-orange);
}

.page-about .team-role h3 {
  font-family: var(--font-heading);
  font-size: 17px;
  margin: 0 0 10px;
}

.page-about .team-role p {
  margin: 0;
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.7;
}

.page-about .about-bridge {
  padding-top: 48px;
  border-top: 1px solid var(--line-light);
  text-align: center;
}

.page-about .about-trust {
  margin: 0 0 30px;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--fluorescent-green);
}

.page-about .about-bridge-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  text-align: left;
  margin-bottom: 26px;
}

.page-about .about-bridge-card {
  display: block;
  padding: 24px 20px 20px;
  background: var(--night-blue);
  border: 1px solid var(--line-light);
  border-radius: 2px;
  text-decoration: none;
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.page-about .about-bridge-card:hover {
  transform: translateY(-4px);
  border-color: var(--alert-orange);
}

.page-about .bridge-card-index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--alert-orange);
}

.page-about .about-bridge-card h3 {
  margin: 8px 0 8px;
  font-family: var(--font-heading);
  font-size: 18px;
  color: var(--text-white);
}

.page-about .about-bridge-card p {
  margin: 0 0 14px;
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.7;
}

.page-about .bridge-arrow {
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--fluorescent-green);
  transition: letter-spacing 0.25s ease;
}

.page-about .about-bridge-card:hover .bridge-arrow {
  letter-spacing: 0.14em;
}

.page-about .about-contact-note {
  margin: 0;
  color: var(--text-dim);
  font-size: 13px;
  line-height: 1.8;
}

.page-about .about-contact-note a {
  color: var(--fluorescent-green);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s ease;
}

.page-about .about-contact-note a:hover {
  border-color: var(--fluorescent-green);
}

@media (max-width: 479px) {
  .page-about .about-data-stats {
    grid-template-columns: 1fr;
  }

  .page-about .about-hero h1 {
    font-size: 28px;
  }
}

@media (min-width: 760px) {
  .page-about .about-data-features {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 780px) {
  .page-about .about-tech-steps {
    grid-template-columns: repeat(3, 1fr);
  }

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

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

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

@media (min-width: 900px) {
  .page-about .about-positioning {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: center;
    gap: 48px;
  }

  .page-about .about-data-stats {
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
  }

  .page-about .about-timeline-list::before {
    left: 50%;
    transform: translateX(-1px);
  }

  .page-about .timeline-item {
    width: 50%;
    padding-left: 0;
    padding-right: 56px;
    margin-left: 0;
  }

  .page-about .timeline-item:nth-child(even) {
    margin-left: 50%;
    padding-left: 56px;
    padding-right: 0;
  }

  .page-about .timeline-marker {
    left: auto;
    right: -8px;
  }

  .page-about .timeline-item:nth-child(even) .timeline-marker {
    right: auto;
    left: -8px;
  }

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

  .page-about .timeline-item:nth-child(even):hover .timeline-card {
    transform: translateX(-6px);
  }
}