.page-about {
  --about-kicker-size: 0.72rem;
  --about-shell-gap: clamp(1.6rem, 5vw, 3rem);
}

/* ---------- 面包屑 ---------- */
.page-about .crumbs {
  padding-top: clamp(0.9rem, 3vw, 1.6rem);
  padding-bottom: clamp(0.6rem, 2vw, 1rem);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.4rem, 4vw, 2.4rem) 0 clamp(2.6rem, 7vw, 5rem);
  background:
    radial-gradient(circle at 84% 14%, rgba(45, 212, 191, 0.18), transparent 56%),
    radial-gradient(circle at 6% 96%, rgba(255, 107, 44, 0.14), transparent 52%),
    var(--ink);
  color: var(--fog);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 3px;
  background: linear-gradient(90deg, var(--lime) 0 22%, var(--flare) 22% 40%, var(--cyan) 40% 58%, transparent 58%);
  opacity: 0.85;
}

.page-about .about-hero-grid {
  display: grid;
  gap: var(--about-shell-gap);
  align-items: center;
}

.page-about .about-hero-copy {
  min-width: 0;
}

.page-about .about-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 0.9rem;
  font-size: var(--about-kicker-size);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mute);
}

.page-about .about-kicker-dot {
  width: 8px;
  height: 8px;
  background: var(--lime);
  clip-path: polygon(0 0, 100% 0, 100% 70%, 70% 100%, 0 100%);
}

.page-about .about-hero h1 {
  margin: 0 0 1rem;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2.05rem, 6.4vw, 4.2rem);
  line-height: 1.06;
  letter-spacing: -0.022em;
  color: var(--fog);
}

.page-about .about-lede {
  margin: 0;
  max-width: 42ch;
  font-size: clamp(0.98rem, 2.4vw, 1.12rem);
  line-height: 1.8;
  color: rgba(233, 238, 246, 0.82);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.6rem;
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.8rem;
  margin: 1.9rem 0 0;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line);
}

.page-about .about-facts dt {
  margin: 0 0 0.35rem;
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mute);
}

.page-about .about-facts dd {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1rem, 3vw, 1.35rem);
  color: var(--lime);
  word-break: break-word;
}

.page-about .about-hero-visual {
  margin: 0;
  border: 1px solid var(--line);
  box-shadow: var(--lift);
}

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

/* ---------- 使命 ---------- */
.page-about .about-mission {
  padding: clamp(2.6rem, 7vw, 5rem) 0;
  background: var(--paper);
  color: var(--ink);
}

.page-about .about-mission-grid {
  display: grid;
  gap: clamp(1.4rem, 4vw, 2.6rem);
}

.page-about .about-mission-lead h2,
.page-about .about-sec-head h2,
.page-about .about-team-copy h2,
.page-about .about-cta h2 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.5rem, 3.6vw, 2.5rem);
  line-height: 1.22;
  letter-spacing: -0.015em;
}

.page-about .about-mission-lead h2 {
  color: var(--ink);
}

.page-about .about-mission-body p {
  margin: 0 0 1.1rem;
  font-size: clamp(0.96rem, 2.3vw, 1.05rem);
  line-height: 1.85;
  color: #24304d;
}

.page-about .about-quote {
  margin: 1.8rem 0 0;
  padding: 1.3rem 1.4rem;
  background: var(--ink);
  color: var(--fog);
  border-left: 5px solid var(--flare);
}

.page-about .about-quote p {
  margin: 0 0 0.7rem;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.1rem, 3vw, 1.5rem);
  line-height: 1.5;
  color: var(--lime);
}

.page-about .about-quote cite {
  font-style: normal;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--mute);
}

/* ---------- 能力体系 ---------- */
.page-about .about-capability {
  padding: clamp(2.6rem, 7vw, 5rem) 0;
  background: var(--fog);
  color: var(--ink);
}

.page-about .about-sec-head {
  max-width: 62ch;
  margin-bottom: clamp(1.6rem, 4vw, 2.6rem);
}

.page-about .about-sec-head h2 {
  color: var(--ink);
}

.page-about .about-sec-head--dark h2 {
  color: var(--fog);
}

.page-about .about-sec-note {
  margin: 0.9rem 0 0;
  font-size: 0.98rem;
  line-height: 1.8;
  color: #3c4966;
}

.page-about .about-sec-head--dark .about-sec-note {
  color: rgba(233, 238, 246, 0.72);
}

.page-about .about-sec-head--dark .about-kicker {
  color: var(--cyan);
}

.page-about .cap-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 250px), 1fr));
  gap: clamp(0.9rem, 2.4vw, 1.3rem);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .cap-item {
  position: relative;
  padding: 1.1rem 1.1rem 1.3rem;
  background: var(--paper);
  border: var(--hair);
  transition: transform 0.24s ease, box-shadow 0.24s ease, border-color 0.24s ease;
}

.page-about .cap-item:hover,
.page-about .cap-item:focus-within {
  transform: translateY(-4px);
  border-color: var(--lime);
  box-shadow: var(--lift);
}

.page-about .cap-no {
  display: inline-block;
  margin-bottom: 0.7rem;
  padding: 0.15rem 0.5rem;
  background: var(--ink);
  color: var(--lime);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
}

.page-about .cap-item h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.05rem;
  color: var(--ink);
}

.page-about .cap-item p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: #3c4966;
}

.page-about .about-cap-foot {
  margin: clamp(1.4rem, 4vw, 2.2rem) 0 0;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  font-size: 0.9rem;
  line-height: 1.8;
  color: #3c4966;
}

/* ---------- 发展历程 ---------- */
.page-about .about-timeline {
  padding: clamp(2.6rem, 7vw, 5rem) 0;
  background: var(--ink);
  color: var(--fog);
}

.page-about .tl {
  --tl-pad: clamp(1.35rem, 4vw, 2.4rem);
  position: relative;
  margin: 0;
  padding: 0 0 0 var(--tl-pad);
  border-left: 2px solid var(--line);
  list-style: none;
}

.page-about .tl-item {
  position: relative;
  display: grid;
  gap: 0.45rem;
  padding-bottom: clamp(1.5rem, 4vw, 2.2rem);
}

.page-about .tl-item:last-child {
  padding-bottom: 0;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  top: 0.42rem;
  left: calc(-1 * var(--tl-pad) - 7px);
  width: 12px;
  height: 12px;
  background: var(--lime);
  border: 2px solid var(--ink);
  transform: rotate(45deg);
  transition: background 0.24s ease, transform 0.24s ease;
}

.page-about .tl-item:hover::before,
.page-about .tl-item:focus-within::before {
  background: var(--flare);
  transform: rotate(45deg) scale(1.18);
}

.page-about .tl-year {
  font-size: clamp(1.1rem, 3.2vw, 1.45rem);
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--lime);
}

.page-about .tl-body h3 {
  margin: 0 0 0.45rem;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.02rem, 2.5vw, 1.2rem);
  color: var(--fog);
}

.page-about .tl-body p {
  margin: 0;
  max-width: 62ch;
  font-size: 0.94rem;
  line-height: 1.8;
  color: rgba(233, 238, 246, 0.76);
}

.page-about .about-tl-figure {
  margin: clamp(1.8rem, 5vw, 2.8rem) 0 0;
  border: 1px solid var(--line);
}

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

.page-about .about-tl-figure .media-frame__caption {
  padding: 0.65rem 0.9rem;
  border-top: 1px solid var(--line);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: rgba(233, 238, 246, 0.62);
}

.page-about .about-cadence {
  margin: 1.4rem 0 0;
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: clamp(2.6rem, 7vw, 5rem) 0;
  background: var(--paper);
  color: var(--ink);
}

.page-about .about-team-grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.8rem);
  align-items: start;
}

.page-about .about-team-copy h2 {
  margin-bottom: 1rem;
  color: var(--ink);
}

.page-about .about-team-copy p {
  margin: 0 0 1rem;
  font-size: clamp(0.95rem, 2.3vw, 1.03rem);
  line-height: 1.85;
  color: #24304d;
}

.page-about .about-team-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.4rem;
}

.page-about .about-team-visual {
  margin: 0;
  border: var(--hair);
  background: var(--fog);
}

.page-about .about-team-visual img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .team-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
  gap: clamp(0.8rem, 2.4vw, 1.2rem);
  margin: clamp(1.8rem, 5vw, 2.8rem) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .team-item {
  padding: 1rem 1rem 1.2rem;
  background: var(--fog);
  border-top: 3px solid var(--line);
  transition: border-color 0.24s ease, background 0.24s ease;
}

.page-about .team-item:hover,
.page-about .team-item:focus-within {
  border-top-color: var(--flare);
  background: #f7fafd;
}

.page-about .team-tag {
  display: inline-block;
  margin-bottom: 0.55rem;
  font-size: 0.64rem;
  letter-spacing: 0.2em;
  color: var(--mute);
}

.page-about .team-item h3 {
  margin: 0 0 0.45rem;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1rem;
  color: var(--ink);
}

.page-about .team-item p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: #3c4966;
}

/* ---------- 区域与资质 ---------- */
.page-about .about-region {
  padding: clamp(2.6rem, 7vw, 5rem) 0;
  background: var(--ink-deep);
  color: var(--fog);
}

.page-about .region-grid {
  display: grid;
  gap: clamp(0.9rem, 2.6vw, 1.4rem);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr));
}

.page-about .region-card {
  position: relative;
  padding: 1.2rem 1.2rem 1.4rem;
  background: rgba(233, 238, 246, 0.04);
  border: 1px solid var(--line);
  transition: border-color 0.24s ease, transform 0.24s ease;
}

.page-about .region-card:hover,
.page-about .region-card:focus-within {
  border-color: var(--cyan);
  transform: translateY(-3px);
}

.page-about .region-card--paper {
  background: var(--paper);
  color: var(--ink);
  border-color: var(--paper);
}

.page-about .region-card h3 {
  margin: 0 0 0.6rem;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.02rem;
  color: inherit;
}

.page-about .region-card p {
  margin: 0 0 0.75rem;
  font-size: 0.9rem;
  line-height: 1.8;
  color: inherit;
}

.page-about .region-card:not(.region-card--paper) p {
  color: rgba(233, 238, 246, 0.76);
}

.page-about .region-meta {
  margin: 0;
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--ink-deep);
}

.page-about .region-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .region-badges li {
  padding: 0.22rem 0.55rem;
  border: 1px solid var(--lime);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--lime);
}

/* ---------- 结尾 CTA ---------- */
.page-about .about-cta {
  padding: clamp(2.4rem, 6vw, 4.2rem) 0;
  background:
    linear-gradient(120deg, rgba(255, 107, 44, 0.14), transparent 58%),
    var(--ink);
  color: var(--fog);
}

.page-about .about-cta-inner {
  display: grid;
  gap: clamp(1.3rem, 4vw, 2.4rem);
  align-items: center;
  border: 1px solid var(--line);
  padding: clamp(1.3rem, 4vw, 2.4rem);
}

.page-about .about-cta h2 {
  color: var(--fog);
}

.page-about .about-cta p {
  margin: 0.8rem 0 0;
  max-width: 54ch;
  font-size: 0.98rem;
  line-height: 1.8;
  color: rgba(233, 238, 246, 0.76);
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

/* ---------- 断点 ---------- */
@media (min-width: 760px) {
  .page-about .tl-item {
    grid-template-columns: 7rem minmax(0, 1fr);
    gap: clamp(1rem, 3vw, 2.2rem);
    align-items: start;
  }

  .page-about .tl-year {
    padding-top: 0.1rem;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .page-about .about-mission-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: clamp(2rem, 6vw, 4.5rem);
  }

  .page-about .about-mission-lead h2 {
    position: sticky;
    top: 1.5rem;
  }

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.95fr);
  }

  .page-about .about-cta-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (max-width: 480px) {
  .page-about .about-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-hero-actions .btn,
  .page-about .about-team-actions .btn,
  .page-about .about-cta-actions .btn {
    flex: 1 1 100%;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .cap-item,
  .page-about .team-item,
  .page-about .region-card,
  .page-about .tl-item::before {
    transition: none;
  }

  .page-about .cap-item:hover,
  .page-about .cap-item:focus-within,
  .page-about .region-card:hover,
  .page-about .region-card:focus-within {
    transform: none;
  }
}