.page-about {
  background: var(--color-cream);
  color: var(--color-ink);
  overflow-x: hidden;
}

.page-about .page-about__breadcrumb-wrap {
  padding-top: 1.5rem;
}

.page-about .about-hero {
  position: relative;
  padding: 3.5rem 0 5.5rem;
  background:
    radial-gradient(circle at 80% 15%, rgba(255,78,0,0.35), transparent 34%),
    radial-gradient(circle at 15% 85%, rgba(255,154,0,0.18), transparent 30%),
    linear-gradient(135deg, var(--color-deep-blue), #10222e);
  color: var(--color-white);
  overflow: hidden;
}

.page-about .about-hero__inner {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.page-about .about-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 1rem;
  color: var(--color-orange-bright);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.page-about .about-hero__kicker::before {
  content: "";
  width: 2rem;
  height: 2px;
  background: var(--color-orange);
}

.page-about .about-hero h1 {
  margin: 0;
  max-width: 12em;
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 7vw, 4.75rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: 0.01em;
}

.page-about .about-hero__lead {
  margin: 1.25rem 0 0;
  max-width: 38rem;
  font-size: 1.125rem;
  line-height: 1.8;
  color: rgba(255,255,255,0.86);
}

.page-about .about-hero__chapters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.page-about .about-hero__chapter {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1rem;
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 999px;
  color: var(--color-white);
  font-size: 0.9rem;
  text-decoration: none;
  transition: background-color 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-about .about-hero__chapter span {
  color: var(--color-orange-bright);
  font-family: var(--font-mono);
}

.page-about .about-hero__chapter:hover,
.page-about .about-hero__chapter.is-active {
  background: rgba(255,78,0,0.28);
  border-color: var(--color-orange);
}

.page-about .about-hero__chapter.is-active span {
  color: var(--color-white);
}

.page-about .about-hero__visual {
  display: none;
}

.page-about .about-hero__skyline {
  display: block;
  width: 100%;
  margin-inline: auto;
  opacity: 0.85;
}

.page-about .about-chapter {
  position: relative;
  padding: 4rem 0;
  scroll-margin-top: var(--header-h);
}

.page-about .about-chapter__num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 2.75rem;
  font-weight: 700;
  line-height: 1;
  color: var(--color-orange);
  opacity: 0.9;
}

.page-about .about-chapter__caption {
  margin-top: 0.5rem;
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-ink-soft);
}

.page-about .section-head {
  margin: 1rem 0 0;
}

.page-about .section-head .section-label {
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-orange);
}

.page-about .section-head h2 {
  margin: 0.4rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4vw, 3.2rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: 0.01em;
  color: inherit;
}

/* 01 起源 */
.page-about .about-origin {
  background: var(--color-cream);
  color: var(--color-ink);
}

.page-about .about-origin__grid {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.page-about .about-origin__content p {
  line-height: 1.8;
  margin: 0 0 1rem;
  font-size: 1rem;
  color: var(--color-ink-soft);
}

.page-about .about-origin__media {
  margin: 0;
}

.page-about .about-origin__media img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  box-shadow: 0 24px 48px rgba(30,27,24,0.18);
}

.page-about .about-origin__media figcaption {
  margin-top: 0.75rem;
  font-size: 0.875rem;
  color: var(--color-ink-soft);
  border-left: 3px solid var(--color-orange);
  padding-left: 0.75rem;
}

/* 02 历程 */
.page-about .about-timeline {
  background: var(--color-deep-blue);
  color: var(--color-white);
}

.page-about .about-timeline .about-chapter__num,
.page-about .about-timeline .section-head .section-label {
  color: var(--color-orange-bright);
}

.page-about .about-timeline__head {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 2.5rem;
}

.page-about .about-timeline__list-wrap {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

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

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 2.5rem 1.5rem;
  border-left: 2px solid rgba(255,255,255,0.16);
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -0.5rem;
  top: 0.4rem;
  width: 0.875rem;
  height: 0.875rem;
  border-radius: 50%;
  background: var(--color-orange);
  box-shadow: 0 0 0 5px rgba(255,78,0,0.18);
}

.page-about .about-timeline__year {
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-orange-bright);
  margin-bottom: 0.35rem;
}

.page-about .about-timeline__card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  transition: background-color 0.3s var(--ease);
}

.page-about .about-timeline__card:hover {
  background: rgba(255,255,255,0.1);
}

.page-about .about-timeline__card .badge {
  margin-bottom: 0.5rem;
  display: inline-block;
}

.page-about .about-timeline__card h3 {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-size: 1.2rem;
}

.page-about .about-timeline__card p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.75);
}

.page-about .about-timeline__media {
  margin: 0;
  align-self: center;
}

.page-about .about-timeline__media img {
  width: 100%;
  max-width: 400px;
  height: auto;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 20px 40px rgba(0,0,0,0.25);
}

/* 03 能力 */
.page-about .about-capabilities {
  background: var(--color-cream);
  color: var(--color-ink);
}

.page-about .about-capabilities__grid {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.page-about .about-capabilities__intro {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--color-ink-soft);
  max-width: 32rem;
}

.page-about .about-capabilities__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
  margin: 0;
}

.page-about .about-capabilities__stat {
  background: var(--color-cream-dark);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  border-top: 4px solid var(--color-orange);
}

.page-about .about-capabilities__stat dt {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ink-soft);
}

.page-about .about-capabilities__stat dd {
  display: flex;
  align-items: baseline;
  margin: 0.5rem 0;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 1rem;
  color: var(--color-ink-soft);
}

.page-about .about-capabilities__stat dd strong {
  font-family: var(--font-display);
  font-size: 2.75rem;
  line-height: 0.9;
  color: var(--color-orange);
  margin-right: 0.25rem;
}

.page-about .about-capabilities__stat p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--color-ink-soft);
}

.page-about .about-capabilities__foot {
  border-top: 1px solid var(--color-cream-dark);
  padding-top: 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem;
}

.page-about .about-capabilities__foot p {
  margin: 0;
  max-width: 42rem;
  line-height: 1.8;
  color: var(--color-ink-soft);
}

/* 04 团队 */
.page-about .about-team {
  background: var(--color-cream-dark);
  color: var(--color-ink);
}

.page-about .about-team__grid {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.page-about .about-team__copy p {
  line-height: 1.8;
  color: var(--color-ink-soft);
}

.page-about .about-team__values {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  display: grid;
  gap: 1.25rem;
}

.page-about .about-team__values li {
  border-top: 2px solid var(--color-orange);
  padding-top: 0.75rem;
}

.page-about .about-team__values strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: 0.02em;
}

.page-about .about-team__values span {
  font-size: 0.9rem;
  color: var(--color-ink-soft);
}

.page-about .about-team__media {
  margin: 0;
}

.page-about .about-team__media img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  box-shadow: 0 24px 48px rgba(30,27,24,0.16);
}

/* 05 结尾 */
.page-about .about-night {
  background:
    radial-gradient(circle at 75% 20%, rgba(255,78,0,0.2), transparent 30%),
    var(--color-deep-blue);
  color: var(--color-white);
  text-align: center;
}

.page-about .about-night .about-chapter__num {
  color: var(--color-orange-bright);
}

.page-about .about-night .section-label {
  color: var(--color-orange-bright);
}

.page-about .about-night h2 {
  margin: 0.5rem 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4vw, 3.2rem);
  line-height: 1.12;
}

.page-about .about-night p {
  max-width: 40rem;
  margin: 0 auto 0.5rem;
  line-height: 1.8;
  color: rgba(255,255,255,0.82);
}

.page-about .about-night__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  margin-top: 2rem;
}

.page-about .about-night .btn--ghost {
  border-color: rgba(255,255,255,0.35);
  color: var(--color-white);
}

.page-about .about-night .btn--ghost:hover {
  background: rgba(255,255,255,0.12);
}

/* 桌面端 */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 6rem 0 7rem;
  }

  .page-about .about-hero__inner {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    align-items: center;
    gap: 3rem;
  }

  .page-about .about-hero__visual {
    display: block;
    align-self: center;
  }

  .page-about .about-hero__skyline {
    width: 100%;
  }

  .page-about .about-chapter {
    padding: 6rem 0;
  }

  .page-about .about-origin__grid {
    display: grid;
    grid-template-columns: 120px minmax(0, 1fr) minmax(280px, 400px);
    gap: 2.5rem 3rem;
    align-items: start;
  }

  .page-about .about-origin__aside {
    position: sticky;
    top: calc(var(--header-rail) + 2rem);
  }

  .page-about .about-chapter__caption {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    margin-top: 0;
    margin-left: 0.75rem;
    white-space: nowrap;
  }

  .page-about .about-timeline__head {
    flex-direction: row;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 3rem;
  }

  .page-about .about-timeline__list-wrap {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 380px;
    gap: 3rem;
    align-items: start;
  }

  .page-about .about-timeline__media {
    align-self: stretch;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .page-about .about-timeline__media img {
    width: 100%;
    max-width: 400px;
    aspect-ratio: 1 / 1;
    object-fit: cover;
    border-radius: 24px;
  }

  .page-about .about-capabilities__grid {
    display: grid;
    grid-template-columns: 0.85fr 1.15fr;
    grid-template-areas:
      "heading intro"
      "stats stats"
      "foot foot";
    gap: 2rem 3rem;
  }

  .page-about .about-capabilities__heading {
    grid-area: heading;
  }

  .page-about .about-capabilities__intro {
    grid-area: intro;
    align-self: end;
  }

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

  .page-about .about-capabilities__foot {
    grid-area: foot;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }

  .page-about .about-team__grid {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
    gap: 3rem;
    align-items: center;
  }

  .page-about .about-team__values {
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }
}