.page-about {
  --page-about-gutter: clamp(24px, 4vw, 80px);
  --page-about-lead: clamp(18px, 2.4vw, 24px);
  --page-about-num: clamp(32px, 5vw, 56px);
  scroll-behavior: smooth;
}

.page-about .about-hero {
  position: relative;
  min-height: max(600px, 90vh);
  display: flex;
  align-items: flex-end;
  padding: calc(var(--header-height) + 56px) 0 80px;
  overflow: hidden;
  background: var(--night-blue);
  color: var(--fog-white);
}

.page-about .about-hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-about .about-hero-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.3;
  filter: saturate(0.72) contrast(1.06);
}

.page-about .about-hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(180deg, rgba(26, 42, 58, 0.66) 0%, rgba(26, 42, 58, 0.88) 55%, var(--night-blue) 100%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: repeating-linear-gradient(118deg, rgba(0, 166, 81, 0.1) 0 2px, transparent 2px 34px);
  pointer-events: none;
}

.page-about .about-hero-inner {
  position: relative;
  z-index: 2;
  width: 100%;
}

.page-about .about-hero-grid {
  display: grid;
  gap: 32px;
  margin-top: 32px;
}

.page-about .about-hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 14px;
  letter-spacing: 0.14em;
  color: var(--amber-accent);
  margin-bottom: 16px;
}

.page-about .about-hero-kicker::before {
  content: "";
  width: 34px;
  height: 4px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--primary-green), var(--passion-red));
}

.page-about .about-hero h1 {
  margin: 0 0 20px;
  font-family: var(--font-heading);
  font-size: clamp(34px, 6vw, 72px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--fog-white);
}

.page-about .about-hero .lead {
  max-width: 42em;
  margin: 0;
  font-size: var(--page-about-lead);
  line-height: 1.7;
  color: rgba(245, 247, 250, 0.86);
}

.page-about .about-hero-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.page-about .hero-chip {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius-pill);
  padding: 10px 16px;
  font-size: 13px;
  color: var(--fog-white);
}

.page-about .hero-chip strong {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 18px;
  color: var(--primary-green);
}

.page-about .about-innav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 12px;
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.page-about .innav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 48px;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 14px;
  color: var(--fog-white);
  transition: border-color 0.25s ease, background-color 0.25s ease, transform 0.15s ease;
}

.page-about .innav-item:hover {
  border-color: var(--primary-green);
  background: rgba(0, 166, 81, 0.16);
  transform: translateY(-2px);
}

.page-about .innav-num {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 14px;
  color: var(--passion-red);
  flex-shrink: 0;
}

.page-about .innav-text {
  font-size: 14px;
  font-weight: 700;
}

.page-about .about-section {
  scroll-margin-top: calc(var(--header-height) + 24px);
  padding: 72px 0;
  position: relative;
}

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

.page-about .chapter-rail {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.page-about .chapter-num {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: var(--page-about-num);
  line-height: 1;
  color: var(--primary-green);
  transition: color 0.25s ease, transform 0.25s ease;
}

.page-about:target .chapter-num,
.page-about .about-section:target .chapter-num {
  color: var(--passion-red);
  transform: scale(1.06);
}

.page-about .chapter-rule {
  height: 3px;
  min-width: 40px;
  max-width: 88px;
  flex: 1;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--primary-green), var(--passion-red));
}

.page-about .chapter-name {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--silver-line);
}

.page-about .about-body {
  min-width: 0;
}

.page-about .about-body h2 {
  font-family: var(--font-heading);
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 8px 0 16px;
  color: var(--ink-black);
}

.page-about .about-lead {
  margin: 0;
  font-size: 17px;
  line-height: 1.75;
  color: var(--ink-black);
  max-width: 52em;
}

.page-about .about-who {
  background: var(--fog-white);
}

.page-about .about-definition {
  margin: 32px 0;
  padding: 22px 24px;
  background: var(--night-blue);
  border-left: 5px solid var(--passion-red);
  border-radius: 0 16px 16px 0;
  color: var(--fog-white);
  box-shadow: 8px 12px 24px rgba(26, 42, 58, 0.16);
}

.page-about .about-definition p {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
}

.page-about .about-points {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .point-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px 20px;
  background: #ffffff;
  border: var(--line-width) solid var(--silver-line);
  border-radius: 16px;
  transition: border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

.page-about .point-item:hover {
  border-color: var(--primary-green);
  transform: translateY(-3px);
  box-shadow: 0 10px 24px rgba(0, 166, 81, 0.12);
}

.page-about .point-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-black);
}

.page-about .point-tag {
  flex-shrink: 0;
  min-width: 34px;
  text-align: center;
}

.page-about .about-milestones {
  background:
    repeating-linear-gradient(115deg, rgba(0, 166, 81, 0.07) 0 2px, transparent 2px 30px),
    var(--night-blue);
  color: var(--fog-white);
}

.page-about .about-milestones .about-body h2,
.page-about .about-milestones .about-lead,
.page-about .about-milestones .chapter-name {
  color: var(--fog-white);
}

.page-about .about-milestones .about-lead {
  color: rgba(245, 247, 250, 0.78);
}

.page-about .timeline-list {
  position: relative;
  list-style: none;
  margin: 44px 0 0;
  padding: 0;
}

.page-about .timeline-list::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 16px;
  width: 3px;
  transform: translateX(-1px);
  border-radius: 2px;
  background: linear-gradient(180deg, var(--primary-green) 0%, var(--primary-green) 22%, var(--passion-red) 100%);
}

.page-about .timeline-item {
  position: relative;
  padding-left: 52px;
  margin-bottom: 26px;
}

.page-about .timeline-item::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 22px;
  width: 17px;
  height: 17px;
  border-radius: 50%;
  background: var(--night-blue);
  border: 3px solid var(--primary-green);
  box-shadow: 0 0 0 5px rgba(0, 166, 81, 0.18);
  z-index: 1;
}

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

.page-about .timeline-card {
  background: rgba(255, 255, 255, 0.045);
  border: var(--line-width) solid rgba(255, 255, 255, 0.12);
  border-radius: 16px;
  transition: border-color 0.25s ease, background-color 0.25s ease;
}

.page-about .timeline-card:hover {
  border-color: rgba(0, 166, 81, 0.5);
}

.page-about .timeline-card[open] {
  border-color: rgba(0, 166, 81, 0.7);
  background: rgba(0, 166, 81, 0.09);
}

.page-about .timeline-card summary {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 14px;
  list-style: none;
  cursor: pointer;
  padding: 18px 20px;
  font-weight: 700;
  font-size: 15px;
  line-height: 1.45;
  color: var(--fog-white);
}

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

.page-about .timeline-year {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 14px;
  color: var(--primary-green);
  background: rgba(0, 166, 81, 0.14);
  border: 1px solid rgba(0, 166, 81, 0.28);
  border-radius: var(--radius-pill);
  padding: 5px 12px;
  white-space: nowrap;
}

.page-about .timeline-title {
  flex: 1 1 180px;
  min-width: 0;
}

.page-about .timeline-toggle {
  position: relative;
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.page-about .timeline-toggle::before,
.page-about .timeline-toggle::after {
  content: "";
  position: absolute;
  background: var(--silver-line);
  transition: transform 0.25s ease;
  border-radius: 2px;
}

.page-about .timeline-toggle::before {
  left: 3px;
  top: 11px;
  width: 18px;
  height: 2px;
}

.page-about .timeline-toggle::after {
  left: 11px;
  top: 3px;
  width: 2px;
  height: 18px;
}

.page-about .timeline-card[open] .timeline-toggle::after {
  transform: scaleY(0);
}

.page-about .timeline-detail {
  padding: 0 20px 20px;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(245, 247, 250, 0.82);
}

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

.page-about .timeline-item.timeline-media {
  padding-left: 0;
  margin: 28px 0 40px;
  display: flex;
  justify-content: center;
}

.page-about .timeline-item.timeline-media::before {
  content: none;
}

.page-about .timeline-figure {
  margin: 0;
  max-width: 420px;
  width: 100%;
  border-radius: var(--radius-card);
  border: var(--line-width) solid rgba(255, 255, 255, 0.14);
  padding: 10px;
  background: rgba(255, 255, 255, 0.05);
  position: relative;
}

.page-about .timeline-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 12px;
}

.page-about .about-data {
  background: linear-gradient(180deg, var(--fog-white) 0%, #ebf3ef 100%);
}

.page-about .stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 40px;
}

.page-about .stat-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--night-blue);
  border: var(--line-width) solid var(--night-blue);
  border-radius: var(--radius-card);
  padding: 22px 18px;
  transition: border-color 0.25s ease, background-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

.page-about .stat-card:hover {
  border-color: var(--primary-green);
  background: var(--ash-gray);
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(26, 42, 58, 0.22);
}

.page-about .stat-num {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: clamp(26px, 5vw, 40px);
  line-height: 1.12;
  letter-spacing: -0.02em;
}

.page-about .stat-green {
  color: var(--primary-green);
}

.page-about .stat-red {
  color: var(--passion-red);
}

.page-about .stat-label {
  font-size: 14px;
  font-weight: 700;
  color: var(--fog-white);
}

.page-about .stat-note {
  font-size: 12px;
  line-height: 1.6;
  color: rgba(245, 247, 250, 0.6);
}

.page-about .about-philosophy {
  background: linear-gradient(180deg, #f2f7f4 0%, var(--fog-white) 100%);
}

.page-about .philosophy-grid {
  display: grid;
  align-items: center;
  gap: 36px;
  margin-top: 36px;
}

.page-about .philosophy-copy h3 {
  font-family: var(--font-heading);
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.25;
  margin: 0 0 14px;
  color: var(--ink-black);
}

.page-about .philosophy-copy p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-black);
}

.page-about .philosophy-principles {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 4px;
}

.page-about .principle-item {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 15px 0;
  border-bottom: 1px solid var(--silver-line);
}

.page-about .principle-no {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 16px;
  color: var(--passion-red);
  flex-shrink: 0;
}

.page-about .principle-item p {
  margin: 0;
}

.page-about .philosophy-media {
  margin: 0;
  padding: 14px;
  background: #ffffff;
  border: var(--line-width) solid var(--primary-green);
  border-radius: 24px;
  transform: rotate(1.2deg);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
  box-shadow: 14px 16px 32px rgba(26, 42, 58, 0.14);
}

.page-about .philosophy-media:hover {
  transform: rotate(0deg) scale(1.01);
  border-color: var(--passion-red);
  box-shadow: 8px 12px 28px rgba(228, 0, 43, 0.12);
}

.page-about .philosophy-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 14px;
}

.page-about .about-cta {
  position: relative;
  background: var(--night-blue);
  color: var(--fog-white);
  padding: 76px 0;
  overflow: hidden;
}

.page-about .about-cta::before {
  content: "";
  position: absolute;
  right: -12%;
  top: -30%;
  width: 460px;
  height: 460px;
  background: radial-gradient(circle, rgba(228, 0, 43, 0.26), transparent 68%);
  pointer-events: none;
}

.page-about .about-cta::after {
  content: "";
  position: absolute;
  left: -8%;
  bottom: -40%;
  width: 480px;
  height: 480px;
  background: radial-gradient(circle, rgba(0, 166, 81, 0.22), transparent 66%);
  pointer-events: none;
}

.page-about .about-cta-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 30px;
}

.page-about .about-cta-copy h2 {
  margin: 10px 0 12px;
  font-family: var(--font-heading);
  font-size: clamp(26px, 4vw, 40px);
  color: var(--fog-white);
}

.page-about .about-cta-copy p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(245, 247, 250, 0.82);
  max-width: 46em;
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

@media (min-width: 568px) {
  .page-about .stats-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

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

@media (min-width: 768px) {
  .page-about .about-cta-inner {
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 40px;
  }

  .page-about .about-hero {
    min-height: max(580px, 82vh);
    padding-bottom: 96px;
  }

  .page-about .about-section {
    padding: 96px 0;
  }
}

@media (min-width: 992px) {
  .page-about .about-section-inner {
    grid-template-columns: 108px minmax(0, 1fr);
    gap: var(--page-about-gutter);
  }

  .page-about .chapter-rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 0;
    position: sticky;
    top: calc(var(--header-height) + 48px);
    align-self: start;
    padding-top: 8px;
  }

  .page-about .chapter-rule {
    width: 3px;
    height: 92px;
    min-width: 0;
    max-width: none;
    flex: none;
    border-radius: 2px;
    background: linear-gradient(180deg, var(--primary-green), var(--passion-red));
  }

  .page-about .chapter-name {
    writing-mode: vertical-rl;
    text-orientation: mixed;
  }

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

  .page-about .timeline-item {
    width: calc(50% - 48px);
    padding-left: 0;
  }

  .page-about .timeline-item:nth-child(odd) {
    margin-right: auto;
    margin-left: 0;
  }

  .page-about .timeline-item:nth-child(even) {
    margin-left: auto;
    margin-right: 0;
  }

  .page-about .timeline-item::before {
    top: 24px;
  }

  .page-about .timeline-item:nth-child(odd)::before {
    left: auto;
    right: calc(-48px - 8px);
  }

  .page-about .timeline-item:nth-child(even)::before {
    left: calc(-48px - 8px);
    right: auto;
  }

  .page-about .timeline-item.timeline-media {
    width: 100%;
    margin: 36px 0 44px;
    padding: 0;
  }

  .page-about .timeline-item.timeline-media::before {
    content: none;
  }

  .page-about .philosophy-grid {
    grid-template-columns: 1.08fr 0.92fr;
    gap: 52px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero .lead {
    max-width: 38em;
  }

  .page-about .about-body {
    max-width: 880px;
  }
}