.page-about {
  background: var(--color-gray);
}

.page-about .about-hero {
  position: relative;
  min-height: 660px;
  padding: 48px 0 72px;
  background: linear-gradient(152deg, #0E2A47 0%, #1B3A5C 58%, #FF7A00 175%);
  color: var(--color-white);
  overflow: hidden;
  isolation: isolate;
  display: flex;
  align-items: center;
}

.page-about .about-hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  margin: 0;
}

.page-about .about-hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.4;
  mix-blend-mode: screen;
}

.page-about .about-hero-inner {
  position: relative;
  z-index: 1;
  width: 100%;
}

.page-about .about-hero .breadcrumb {
  margin-bottom: 48px;
  color: rgba(255, 255, 255, 0.7);
}

.page-about .about-hero .breadcrumb a {
  color: rgba(255, 255, 255, 0.9);
  text-decoration-color: rgba(255, 255, 255, 0.45);
}

.page-about .about-hero .crumb-sep {
  color: rgba(255, 255, 255, 0.45);
  margin: 0 6px;
}

.page-about .about-hero-content {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.page-about .about-hero-copy {
  max-width: 640px;
}

.page-about .about-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  color: var(--color-yellow);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.page-about .about-kicker::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--color-yellow);
  flex: none;
}

.page-about .about-hero h1 {
  margin: 0 0 18px;
  font-family: var(--font-headline);
  font-size: clamp(2.1rem, 6vw, 4.3rem);
  line-height: 1.08;
  color: var(--color-white);
}

.page-about .about-lead {
  margin: 0 0 32px;
  font-size: 1.05rem;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.86);
  max-width: 34em;
}

.page-about .about-hero-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 999px;
  color: var(--color-white);
  font-weight: 600;
  text-decoration: none;
  transition: background var(--duration) ease, border-color var(--duration) ease, transform var(--duration) ease;
}

.page-about .about-hero-link::after {
  content: "↓";
  color: var(--color-yellow);
}

.page-about .about-hero-link:hover,
.page-about .about-hero-link:focus-visible {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--color-yellow);
  transform: translateY(2px);
}

.page-about .about-brand-time {
  font-family: var(--font-mono);
  font-size: clamp(4.6rem, 20vw, 11rem);
  font-weight: 800;
  line-height: 0.85;
  letter-spacing: -0.02em;
  color: var(--color-yellow);
  text-shadow: 0 0 44px rgba(255, 199, 0, 0.35);
  white-space: nowrap;
}

.page-about .about-story,
.page-about .about-timeline,
.page-about .about-data,
.page-about .about-team {
  padding: 72px 0;
}

.page-about .about-story {
  background: var(--color-gray);
  border-top: 6px solid var(--color-white);
}

.page-about .about-timeline {
  background: linear-gradient(180deg, #FFF7DC 0%, var(--color-white) 100%);
  border-top: 6px solid var(--color-yellow);
}

.page-about .about-data {
  background: var(--color-orange-soft);
  border-top: 6px solid var(--color-orange);
}

.page-about .about-team {
  background: var(--color-blue);
  border-top: 6px solid var(--color-yellow);
  color: var(--color-white);
}

.page-about .about-chapter-grid {
  display: block;
}

.page-about .about-chapter-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
  border-left: 4px solid var(--color-orange);
  padding-left: 14px;
}

.page-about .about-chapter-no {
  font-family: var(--font-headline);
  font-size: 0.88rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--color-orange);
}

.page-about .about-chapter-label {
  font-family: var(--font-headline);
  font-size: 1.55rem;
  font-weight: 800;
  line-height: 1.1;
  color: var(--color-blue);
}

.page-about .about-story-content,
.page-about .about-timeline-content,
.page-about .about-data-content,
.page-about .about-team-content {
  max-width: 740px;
}

.page-about .about-story-content h2,
.page-about .about-timeline-content h2,
.page-about .about-data-content h2,
.page-about .about-team-content h2 {
  margin: 0 0 20px;
  font-family: var(--font-headline);
  font-size: clamp(1.7rem, 3vw, 2.5rem);
  line-height: 1.2;
  color: var(--color-blue);
}

.page-about .about-story-content p,
.page-about .about-timeline-content p,
.page-about .about-data-content p,
.page-about .about-team-content p {
  margin: 0 0 16px;
  color: var(--color-gray-dark);
  line-height: 1.8;
}

.page-about .about-story-note {
  margin: 28px 0;
  padding: 24px;
  border-left: 6px solid var(--color-orange);
  border-radius: 2px;
  background: var(--color-white);
}

.page-about .about-story-note p {
  margin: 0;
  font-family: var(--font-headline);
  font-size: 1.2rem;
  line-height: 1.55;
  color: var(--color-blue);
}

.page-about .about-stat-list {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-stat-item {
  min-width: 132px;
  padding: 16px 20px;
  background: var(--color-white);
  border: 1px solid var(--color-border-light);
  border-radius: 4px;
  font-size: 0.88rem;
  color: var(--color-blue);
}

.page-about .about-stat-num {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 1.9rem;
  font-weight: 800;
  line-height: 1.1;
  color: var(--color-orange);
}

.page-about .about-timeline-intro {
  font-size: 1.08rem;
  margin-bottom: 32px;
}

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

.page-about .about-milestone {
  position: relative;
  padding: 0 0 48px 24px;
  border-left: 2px solid var(--color-yellow);
}

.page-about .about-milestone:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .about-milestone::before {
  content: "";
  position: absolute;
  left: -8px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-orange);
  border: 2px solid var(--color-yellow);
  box-shadow: 0 0 0 3px rgba(27, 58, 92, 0.1);
}

.page-about .about-milestone-year {
  display: inline-block;
  margin-bottom: 12px;
  font-family: var(--font-headline);
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1;
  color: var(--color-blue);
  transform-origin: left bottom;
  transition: color var(--duration) ease, transform var(--duration) ease;
}

.page-about .about-milestone:hover .about-milestone-year,
.page-about .about-milestone:focus-within .about-milestone-year {
  color: var(--color-orange);
  transform: scale(1.06);
}

.page-about .about-milestone h3 {
  margin: 0 0 10px;
  font-family: var(--font-headline);
  font-size: 1.28rem;
  line-height: 1.3;
  color: var(--color-blue);
}

.page-about .about-milestone p {
  max-width: 620px;
}

.page-about .about-milestone-figure {
  width: fit-content;
  max-width: 100%;
  margin: 20px 0 0;
  padding: 8px;
  background: var(--color-white);
  border: 1px solid var(--color-border-light);
  border-radius: 4px;
}

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

.page-about .about-data-sources {
  margin: 28px 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .about-data-sources li {
  padding: 18px 20px;
  background: var(--color-white);
  border: 1px solid rgba(255, 122, 0, 0.2);
  border-left: 6px solid var(--color-orange);
  border-radius: 4px;
}

.page-about .about-data-sources li strong {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-headline);
  font-size: 1.05rem;
  color: var(--color-blue);
}

.page-about .about-data-sources li p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--color-gray-dark);
}

.page-about .about-data-coverage {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px dashed rgba(27, 58, 92, 0.25);
  font-weight: 600;
  color: var(--color-blue);
}

.page-about .about-team .about-chapter-label {
  color: var(--color-white);
}

.page-about .about-team .about-chapter-no {
  color: var(--color-yellow);
}

.page-about .about-team-content h2 {
  color: var(--color-white);
}

.page-about .about-team-content p {
  color: rgba(255, 255, 255, 0.84);
}

.page-about .about-team-figure {
  margin: 28px 0 0;
  padding: 8px;
  max-width: 600px;
  background: var(--color-white);
  border-radius: 4px;
}

.page-about .about-team-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-team-principles {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-team-principles li {
  padding: 10px 18px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-white);
  font-size: 0.95rem;
}

.page-about .about-promise {
  padding: 80px 0;
  background: var(--color-gray);
  border-top: 6px solid var(--color-white);
}

.page-about .about-promise-block {
  position: relative;
  max-width: 780px;
  margin: 0 auto;
  padding: 48px 24px;
  text-align: center;
  background: var(--color-white);
  border: 2px solid var(--color-blue);
  border-top: 6px solid var(--color-orange);
  border-radius: 4px;
  box-shadow: var(--shadow-soft);
}

.page-about .about-promise-block::before {
  content: "";
  position: absolute;
  top: -6px;
  left: -2px;
  right: -2px;
  height: 6px;
  background: linear-gradient(90deg, var(--color-orange), var(--color-yellow));
  border-radius: 4px 4px 0 0;
}

.page-about .about-promise-block h2 {
  margin: 0 0 14px;
  font-family: var(--font-headline);
  font-size: 1.9rem;
  color: var(--color-blue);
}

.page-about .about-promise-block p {
  margin: 0 auto 10px;
  max-width: 30em;
  color: var(--color-gray-dark);
  line-height: 1.7;
}

.page-about .about-promise-block p:last-of-type {
  margin-bottom: 0;
}

.page-about .about-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 28px;
}

@media (min-width: 900px) {
  .page-about .about-hero-content {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 48px;
  }

  .page-about .about-brand-time {
    text-align: right;
    font-size: clamp(6rem, 13vw, 11rem);
  }

  .page-about .about-story,
  .page-about .about-timeline,
  .page-about .about-data,
  .page-about .about-team {
    padding: 96px 0;
  }

  .page-about .about-chapter-grid {
    display: grid;
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-chapter-head {
    position: sticky;
    top: 120px;
    display: block;
    margin-bottom: 0;
    padding-left: 16px;
  }

  .page-about .about-chapter-no {
    display: block;
    margin-bottom: 10px;
  }

  .page-about .about-chapter-label {
    display: block;
    font-size: 2rem;
  }

  .page-about .about-milestone {
    padding-left: 32px;
  }

  .page-about .about-milestone-year {
    font-size: 2.6rem;
  }

  .page-about .about-promise-block {
    padding: 56px 48px;
  }
}