.page-about {
  --local-orbitron: "Orbitron", "Noto Sans SC", sans-serif;
  --local-green-glow: rgba(57, 255, 20, 0.14);
  --local-orange-glow: rgba(255, 107, 53, 0.12);
  --local-journey-line: #1E2A4A;
  background: var(--bg-deep);
  color: var(--text-primary);
  overflow-x: hidden;
}

.page-about .container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

.page-about .section {
  padding: clamp(48px, 7vw, 88px) 0;
  border-bottom: 1px solid var(--line-subtle);
}

.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: calc(var(--header-h) + 16px);
  padding-bottom: 24px;
  color: var(--text-secondary);
  font-size: 13px;
  letter-spacing: 0.06em;
}

.page-about .breadcrumb a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.page-about .breadcrumb-sep {
  opacity: 0.5;
}

.page-about .section-heading {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 8px 24px;
  margin-bottom: clamp(32px, 5vw, 56px);
  border-left: 2px solid var(--accent-primary);
  padding-left: 24px;
  position: relative;
}

.page-about .section-heading::before {
  content: "";
  position: absolute;
  left: -2px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.page-about .section-heading:hover::before {
  opacity: 1;
}

.page-about .section-num {
  font-family: var(--local-orbitron);
  font-size: clamp(32px, 6vw, 64px);
  font-weight: 800;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px var(--accent-primary);
  letter-spacing: 0.02em;
  user-select: none;
}

.page-about .section-title {
  font-family: var(--local-orbitron);
  font-size: clamp(22px, 3.4vw, 36px);
  font-weight: 700;
  letter-spacing: 0.04em;
  margin: 0;
  color: var(--text-primary);
  line-height: 1.2;
  align-self: center;
}

.page-about .section-desc {
  flex-basis: 100%;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-secondary);
  margin: 0;
  padding-left: 4px;
  max-width: 720px;
}

/* ---- Brand Mission Hero ---- */

.page-about .about-hero {
  padding: 0 0 clamp(56px, 8vw, 96px) 0;
  position: relative;
  border-bottom: 1px solid var(--line-subtle);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(57, 255, 20, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(57, 255, 20, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.page-about .about-hero-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(32px, 5vw, 56px);
  align-items: center;
  position: relative;
}

.page-about .about-hero-copy {
  padding-top: clamp(32px, 5vw, 48px);
}

.page-about .hero-kicker {
  font-family: var(--local-orbitron);
  font-size: 13px;
  letter-spacing: 0.32em;
  color: var(--accent-primary);
  text-transform: uppercase;
  margin: 0 0 20px;
}

.page-about .about-hero h1 {
  font-family: var(--local-orbitron);
  font-size: clamp(28px, 5.5vw, 56px);
  font-weight: 800;
  line-height: 1.15;
  margin: 0 0 24px;
  color: var(--text-primary);
  letter-spacing: 0.02em;
}

.page-about .about-hero h1::after {
  content: "";
  display: block;
  width: 64px;
  height: 4px;
  margin-top: 24px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  border-radius: 2px;
}

.page-about .hero-lead {
  font-size: 16px;
  line-height: 1.9;
  color: var(--text-secondary);
  max-width: 660px;
  margin: 0 0 32px;
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.page-about .hero-actions .btn {
  text-decoration: none;
}

.page-about .about-hero-visual {
  position: relative;
}

.page-about .about-hero-frame {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--line-subtle);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}

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

.page-about .hero-live-tag {
  position: absolute;
  bottom: 20px;
  left: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(10, 17, 40, 0.9);
  border: 1px solid var(--accent-primary);
  border-radius: 999px;
  padding: 10px 18px;
  font-size: 13px;
  letter-spacing: 0.08em;
  backdrop-filter: blur(8px);
}

.page-about .hero-live-tag .live-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-primary);
  box-shadow: 0 0 12px var(--glow-green);
}

/* ---- Mission Section ---- */

.page-about .about-mission {
  position: relative;
}

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

.page-about .mission-statement {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.page-about .mission-main {
  font-size: clamp(17px, 2.2vw, 22px);
  line-height: 1.8;
  color: var(--text-primary);
  margin: 0;
  max-width: 760px;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-primary) 70%, var(--accent-primary) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .mission-subgrid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-about .mission-item {
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--line-subtle);
  border-radius: var(--radius-md);
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

.page-about .mission-item:hover {
  transform: translateY(-4px);
  border-color: rgba(57, 255, 20, 0.3);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.page-about .mission-item-num {
  display: inline-block;
  font-family: var(--local-orbitron);
  font-size: 14px;
  font-weight: 700;
  color: var(--accent-primary);
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}

.page-about .mission-item h3 {
  font-family: var(--local-orbitron);
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--text-primary);
}

.page-about .mission-item p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-secondary);
  margin: 0;
}

.page-about .mission-facts {
  align-self: start;
}

.page-about .mission-stat {
  border-left: 2px solid var(--accent-primary);
}

.page-about .mission-fact-note {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-top: 16px;
  background: rgba(57, 255, 20, 0.05);
  border: 1px solid rgba(57, 255, 20, 0.15);
  border-radius: var(--radius-sm);
  padding: 16px;
}

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

/* ---- Journey Timeline ---- */

.page-about .about-journey {
  background:
    radial-gradient(ellipse at 15% 20%, rgba(57, 255, 20, 0.06) 0%, transparent 60%),
    radial-gradient(ellipse at 85% 80%, rgba(255, 107, 53, 0.05) 0%, transparent 50%);
}

.page-about .journey-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}

.page-about .journey-image-block {
  display: flex;
  flex-direction: column;
  gap: 16px;
  order: 2;
}

.page-about .journey-image-frame {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--line-subtle);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}

.page-about .journey-image-frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .journey-image-note {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.page-about .journey-timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  order: 1;
  padding-left: 24px;
}

.page-about .journey-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--accent-primary) 0%, var(--line-subtle) 40%, var(--accent-secondary) 100%);
}

.page-about .timeline-node {
  position: relative;
  padding: 0 0 48px 28px;
}

.page-about .timeline-node:last-child {
  padding-bottom: 0;
}

.page-about .timeline-node::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--bg-deep);
  border: 2px solid var(--accent-primary);
  box-shadow: 0 0 12px var(--glow-green);
}

.page-about .timeline-node[data-revealed]::before {
  box-shadow: 0 0 20px var(--glow-green), 0 0 36px rgba(57, 255, 20, 0.2);
}

.page-about .timeline-node:nth-child(3n)::before {
  border-color: var(--accent-secondary);
  box-shadow: 0 0 12px var(--glow-orange);
}

.page-about .timeline-node:nth-child(3n)[data-revealed]::before {
  box-shadow: 0 0 20px var(--glow-orange), 0 0 36px rgba(255, 107, 53, 0.2);
}

.page-about .timeline-year {
  font-family: var(--local-orbitron);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.24em;
  color: var(--accent-secondary);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.page-about .timeline-card {
  background: var(--bg-card);
  border: 1px solid var(--line-subtle);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.page-about .timeline-card:hover {
  border-color: rgba(57, 255, 20, 0.3);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.page-about .timeline-card h3 {
  font-family: var(--local-orbitron);
  font-size: 18px;
  font-weight: 700;
  margin: 8px 0 8px;
  color: var(--text-primary);
}

.page-about .timeline-card p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-secondary);
  margin: 0;
}

/* ---- Service Network ---- */

.page-about .about-network {
  border-bottom: 1px solid var(--line-subtle);
}

.page-about .network-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}

.page-about .network-intro {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-about .network-image-frame {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--line-subtle);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}

.page-about .network-image-frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .network-intro-title {
  font-family: var(--local-orbitron);
  font-size: clamp(20px, 3.2vw, 32px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
  margin: 8px 0 0;
}

.page-about .network-intro-text {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-secondary);
  margin: 0;
  max-width: 560px;
}

.page-about .network-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .network-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-about .network-card {
  background: var(--bg-card);
  border: 1px solid var(--line-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-base), border-color var(--transition-base);
}

.page-about .network-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(180deg, var(--accent-primary), transparent);
  opacity: 0.6;
}

.page-about .network-card:nth-child(2n)::before {
  background: linear-gradient(180deg, var(--accent-secondary), transparent);
}

.page-about .network-card:hover {
  transform: translateY(-3px);
  border-color: rgba(57, 255, 20, 0.25);
}

.page-about .network-card-num {
  font-family: var(--local-orbitron);
  font-size: 18px;
  font-weight: 700;
  color: var(--accent-primary);
  letter-spacing: 0.08em;
}

.page-about .network-card:nth-child(2n) .network-card-num {
  color: var(--accent-secondary);
}

.page-about .network-card h3 {
  font-family: var(--local-orbitron);
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.page-about .network-card p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-secondary);
  margin: 0;
}

.page-about .network-card-spec {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--line-subtle);
  padding-top: 12px;
  margin-top: auto;
}

.page-about .spec-label {
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.page-about .spec-value {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--accent-primary);
}

.page-about .network-card:nth-child(2n) .spec-value {
  color: var(--accent-secondary);
}

/* ---- Data Ops Mechanism ---- */

.page-about .about-data {
  background:
    linear-gradient(rgba(57, 255, 20, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(57, 255, 20, 0.025) 1px, transparent 1px);
  background-size: 32px 32px;
}

.page-about .data-ops-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: start;
}

.page-about .data-ops-visual {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-about .data-ops-panel {
  background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-alt) 100%);
  border: 1px solid var(--line-subtle);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-card);
}

.page-about .data-ops-panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.page-about .data-ops-panel-title {
  font-family: var(--local-orbitron);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--text-primary);
}

.page-about .data-ops-progress {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.page-about .progress-bar {
  position: relative;
  display: block;
  width: 56%;
  height: 7px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  border-radius: 4px;
  overflow: hidden;
}

.page-about .progress-bar::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.35), transparent);
  animation: page-about-pulse 2.4s ease-in-out infinite;
}

@keyframes page-about-pulse {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.page-about .progress-label {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-secondary);
}

.page-about .data-ops-chart {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.page-about .chart-row {
  display: grid;
  grid-template-columns: 90px 1fr 48px;
  align-items: center;
  gap: 12px;
}

.page-about .chart-row-label {
  font-size: 13px;
  color: var(--text-secondary);
  white-space: nowrap;
}

.page-about .chart-row-bar {
  display: block;
  position: relative;
  height: 6px;
  border-radius: 3px;
  background: var(--line-subtle);
  overflow: hidden;
}

.page-about .chart-row-bar::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--row-width);
  border-radius: 3px;
  background: linear-gradient(90deg, var(--accent-primary), rgba(57, 255, 20, 0.3));
}

.page-about .chart-row:nth-child(2) .chart-row-bar::before {
  background: linear-gradient(90deg, var(--accent-secondary), rgba(255, 107, 53, 0.3));
}

.page-about .chart-row-value {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--text-primary);
  text-align: center;
}

.page-about .data-ops-footnote {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  border: 1px solid rgba(57, 255, 20, 0.15);
  border-radius: var(--radius-sm);
  background: rgba(57, 255, 20, 0.04);
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-secondary);
}

.page-about .data-ops-detail {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-about .detail-block {
  background: var(--bg-card);
  border: 1px solid var(--line-subtle);
  border-radius: var(--radius-sm);
  padding: 24px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  position: relative;
  transition: border-color var(--transition-base);
}

.page-about .detail-block:hover {
  border-color: rgba(57, 255, 20, 0.3);
}

.page-about .detail-index {
  font-family: var(--local-orbitron);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--accent-secondary);
}

.page-about .detail-block h3 {
  font-family: var(--local-orbitron);
  font-size: 17px;
  font-weight: 700;
  margin: 4px 0 8px;
  color: var(--text-primary);
}

.page-about .detail-block p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-secondary);
  margin: 0;
}

/* ---- Brand Promise ---- */

.page-about .about-promise {
  border-bottom: none;
}

.page-about .promise-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-bottom: 48px;
}

.page-about .promise-card {
  background: var(--bg-card);
  border: 1px solid var(--line-subtle);
  border-radius: var(--radius-md);
  padding: 28px;
  position: relative;
  overflow: hidden;
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

.page-about .promise-card::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-primary), transparent);
}

.page-about .promise-card:nth-child(2n)::after {
  background: linear-gradient(90deg, var(--accent-secondary), transparent);
}

.page-about .promise-card:hover {
  border-color: rgba(57, 255, 20, 0.3);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.page-about .promise-num {
  font-family: var(--local-orbitron);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--accent-primary);
  opacity: 0.7;
}

.page-about .promise-card:nth-child(2n) .promise-num {
  color: var(--accent-secondary);
}

.page-about .promise-card h3 {
  font-family: var(--local-orbitron);
  font-size: 18px;
  font-weight: 700;
  margin: 14px 0 12px;
  color: var(--text-primary);
}

.page-about .promise-card p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-secondary);
  margin: 0;
}

.page-about .promise-banner {
  background:
    linear-gradient(135deg, rgba(57, 255, 20, 0.08) 0%, transparent 40%),
    linear-gradient(315deg, rgba(255, 107, 53, 0.06) 0%, transparent 40%),
    var(--bg-alt);
  border: 1px solid var(--line-subtle);
  border-radius: var(--radius-md);
  padding: clamp(24px, 4vw, 48px);
  text-align: center;
}

.page-about .promise-banner-slogan {
  font-family: var(--local-orbitron);
  font-size: clamp(22px, 3.5vw, 36px);
  font-weight: 800;
  color: var(--accent-primary);
  letter-spacing: 0.08em;
  margin: 0 0 16px;
  text-shadow: 0 0 32px var(--glow-green);
}

.page-about .promise-banner-sub {
  font-size: 15px;
  line-height: 1.9;
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto 24px;
}

.page-about .promise-banner-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.page-about .promise-banner-actions .btn {
  text-decoration: none;
}

/* ---- Media Queries ---- */

@media (min-width: 640px) {
  .page-about .mission-subgrid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

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

@media (min-width: 1024px) {
  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

  .page-about .about-hero-copy {
    padding-right: 24px;
  }

  .page-about .about-mission-grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: 48px;
  }

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

  .page-about .journey-layout {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .journey-image-block {
    order: 1;
    position: sticky;
    top: 100px;
  }

  .page-about .journey-timeline {
    order: 2;
  }

  .page-about .network-layout {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 56px;
  }

  .page-about .data-ops-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 48px;
  }

  .page-about .promise-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
  }
}

@media (max-width: 640px) {
  .page-about .chart-row {
    grid-template-columns: 72px 1fr 42px;
    gap: 8px;
  }

  .page-about .chart-row-label {
    font-size: 12px;
  }

  .page-about .data-ops-progress {
    flex-direction: column;
    align-items: flex-start;
  }

  .page-about .progress-bar {
    width: 100%;
  }

  .page-about .progress-label {
    font-size: 12px;
  }

  .page-about .hero-live-tag {
    bottom: 12px;
    left: 12px;
    padding: 8px 14px;
    font-size: 12px;
  }
}

.page-about {
  --row-width: 1rem;
}