.page-about {
  --about-card: rgba(10, 51, 40, 0.74);
  --about-card-soft: rgba(19, 91, 70, 0.34);
  --about-gap: clamp(1.25rem, 3vw, 2.25rem);
  --about-section-gap: clamp(3rem, 7vw, 6rem);
  background:
    radial-gradient(circle at 88% 4%, rgba(53, 242, 208, 0.14), transparent 46%),
    radial-gradient(circle at 6% 26%, rgba(255, 138, 61, 0.09), transparent 42%),
    var(--m8-night);
  color: var(--m8-warm);
  font-family: var(--m8-font-body);
  padding-bottom: clamp(2.5rem, 7vw, 5rem);
  overflow-x: hidden;
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  list-style: none;
  margin: 0;
  padding: clamp(1rem, 3vw, 1.6rem) 0 0;
  font-size: 0.8rem;
  color: var(--m8-mist);
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 0.4rem;
  color: rgba(169, 194, 183, 0.5);
}

.page-about .breadcrumb a {
  color: var(--m8-cyan);
  text-decoration: none;
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  text-decoration: underline;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(1.25rem, 4vw, 2rem) 0 clamp(2rem, 5vw, 3.5rem);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--m8-line-strong), transparent);
}

.page-about .about-hero-grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: center;
}

.page-about .about-kicker {
  margin: 0 0 0.85rem;
  font-family: var(--m8-font-num);
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--m8-cyan);
}

.page-about .about-hero h1 {
  margin: 0 0 1rem;
  font-family: var(--m8-font-head);
  font-weight: 900;
  font-size: clamp(2rem, 7vw, 4rem);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--m8-warm);
}

.page-about .about-lead {
  margin: 0 0 1.5rem;
  max-width: 46ch;
  font-size: clamp(0.95rem, 2.6vw, 1.05rem);
  line-height: 1.8;
  color: var(--m8-mist);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: clamp(1.5rem, 4vw, 2.25rem);
}

.page-about .about-facts {
  display: grid;
  gap: 0.9rem;
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--m8-line-soft);
  padding-top: 1.1rem;
}

.page-about .about-facts li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.85rem;
  align-items: baseline;
}

.page-about .about-fact-num {
  font-family: var(--m8-font-num);
  font-size: clamp(1.4rem, 4vw, 1.85rem);
  font-weight: 700;
  color: var(--m8-cyan);
  line-height: 1;
}

.page-about .about-fact-label {
  font-size: 0.86rem;
  line-height: 1.65;
  color: var(--m8-mist);
}

.page-about .about-hero-media {
  position: relative;
  margin: 0;
  border-radius: var(--m8-radius-lg);
  overflow: hidden;
  background: linear-gradient(150deg, var(--m8-turf), var(--m8-deep));
  box-shadow: 0 26px 60px rgba(2, 18, 15, 0.55);
}

.page-about .about-hero-media::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(200deg, rgba(53, 242, 208, 0.18), transparent 55%);
  pointer-events: none;
  z-index: 1;
}

.page-about .about-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

.page-about .about-hero-media figcaption {
  position: relative;
  z-index: 2;
  padding: 0.85rem 1.1rem;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--m8-mist);
  border-top: 1px solid var(--m8-line-soft);
  background: rgba(4, 31, 25, 0.72);
}

/* ---------- 主体：左目录 + 右资料 ---------- */
.page-about .about-body {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  padding-top: clamp(1.75rem, 5vw, 3rem);
}

.page-about .about-index {
  border-radius: var(--m8-radius-md);
  background: var(--about-card-soft);
  border: 1px solid var(--m8-line-soft);
  padding: 1rem 1rem 1.15rem;
}

.page-about .about-index-title {
  margin: 0 0 0.75rem;
  font-family: var(--m8-font-num);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--m8-orange-soft);
}

.page-about .about-index .toc-list {
  display: flex;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0 0 0.35rem;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-index .toc-list li {
  flex: 0 0 auto;
}

.page-about .about-index .toc-list a {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.5rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--m8-line);
  font-size: 0.82rem;
  color: var(--m8-warm);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.2s var(--m8-ease), background 0.2s var(--m8-ease), color 0.2s var(--m8-ease);
}

.page-about .about-index .toc-list a .num {
  font-size: 0.72rem;
  color: var(--m8-cyan);
}

.page-about .about-index .toc-list a:hover,
.page-about .about-index .toc-list a:focus-visible {
  border-color: var(--m8-line-strong);
  background: rgba(53, 242, 208, 0.1);
}

.page-about .about-index .toc-list a[aria-current="true"] {
  border-color: var(--m8-cyan);
  background: rgba(53, 242, 208, 0.16);
  color: var(--m8-cyan);
}

.page-about .about-index-note {
  margin: 0.9rem 0 0;
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--m8-mist);
  border-left: 2px solid var(--m8-orange);
  padding-left: 0.7rem;
}

.page-about .about-sections {
  display: grid;
  gap: var(--about-section-gap);
  min-width: 0;
}

.page-about .about-section {
  min-width: 0;
  scroll-margin-top: 6rem;
}

.page-about .about-section .section-head {
  margin-bottom: clamp(1.25rem, 3vw, 1.9rem);
}

.page-about .about-section .section-num {
  display: inline-block;
  margin: 0 0 0.5rem;
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  color: var(--m8-orange);
}

.page-about .about-section .section-title {
  margin: 0 0 0.65rem;
  font-family: var(--m8-font-head);
  font-weight: 900;
  font-size: clamp(1.5rem, 4.6vw, 2.25rem);
  line-height: 1.25;
  color: var(--m8-warm);
}

.page-about .about-section .section-lead {
  margin: 0;
  max-width: 62ch;
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--m8-mist);
}

/* ---------- 01 定位 ---------- */
.page-about .about-note-grid {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-note {
  position: relative;
  padding: 1.25rem 1.25rem 1.4rem;
  border-radius: var(--m8-radius-md);
  background: var(--about-card);
  border: 1px solid var(--m8-line-soft);
  overflow: hidden;
}

.page-about .about-note.card--slant::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 74px;
  height: 74px;
  background: linear-gradient(140deg, rgba(255, 138, 61, 0.85), rgba(255, 178, 122, 0.15));
  clip-path: polygon(100% 0, 0 0, 100% 100%);
}

.page-about .about-note-title {
  margin: 0 0 0.55rem;
  font-family: var(--m8-font-head);
  font-weight: 800;
  font-size: 1.02rem;
  line-height: 1.5;
  color: var(--m8-warm);
}

.page-about .about-note p {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.8;
  color: var(--m8-mist);
}

/* ---------- 02 时间轴 ---------- */
.page-about .about-figure {
  margin: 0 0 clamp(1.5rem, 4vw, 2.25rem);
  border-radius: var(--m8-radius-lg);
  overflow: hidden;
  border: 1px solid var(--m8-line-soft);
  background: linear-gradient(120deg, var(--m8-panel), var(--m8-deep));
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 2 / 1;
}

.page-about .about-figure figcaption {
  padding: 0.75rem 1rem;
  font-size: 0.78rem;
  color: var(--m8-mist);
  border-top: 1px solid var(--m8-line-soft);
}

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

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 10px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(180deg, var(--m8-cyan), rgba(53, 242, 208, 0.1));
}

.page-about .timeline-item {
  position: relative;
  padding-left: 2.4rem;
  margin-bottom: 0.85rem;
}

.page-about .timeline-item::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 1.1rem;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--m8-night);
  border: 2px solid var(--m8-cyan);
}

.page-about .timeline-panel {
  border-radius: var(--m8-radius-md);
  background: var(--about-card);
  border: 1px solid var(--m8-line-soft);
  transition: border-color 0.2s var(--m8-ease);
}

.page-about .timeline-panel[open] {
  border-color: var(--m8-line-strong);
  background: rgba(10, 51, 40, 0.92);
}

.page-about .timeline-panel summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
  padding: 0.85rem 1rem;
  cursor: pointer;
  list-style: none;
}

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

.page-about .timeline-panel summary:focus-visible {
  outline: 2px solid var(--m8-cyan);
  outline-offset: 2px;
  border-radius: var(--m8-radius-md);
}

.page-about .timeline-version {
  flex: 0 0 auto;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--m8-deep);
  background: var(--m8-cyan);
}

.page-about .timeline-panel[open] .timeline-version {
  background: var(--m8-orange);
  color: var(--m8-deep);
}

.page-about .timeline-name {
  font-family: var(--m8-font-head);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--m8-warm);
}

.page-about .timeline-body {
  padding: 0 1rem 1rem;
  border-top: 1px solid var(--m8-line-soft);
  margin-top: 0.15rem;
}

.page-about .timeline-body p {
  margin: 0.75rem 0 0;
  font-size: 0.85rem;
  line-height: 1.85;
  color: var(--m8-mist);
}

/* ---------- 03 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-team-figure {
  margin: 0;
  border-radius: var(--m8-radius-lg);
  overflow: hidden;
  border: 1px solid var(--m8-line-soft);
  background: var(--m8-panel);
}

.page-about .about-team-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 10 / 7;
}

.page-about .about-team-figure figcaption {
  padding: 0.75rem 1rem;
  font-size: 0.78rem;
  color: var(--m8-mist);
  border-top: 1px solid var(--m8-line-soft);
}

.page-about .about-team-panel {
  border-radius: var(--m8-radius-lg);
  background: var(--about-card);
  border: 1px solid var(--m8-line-soft);
  padding: clamp(1rem, 3vw, 1.5rem);
}

.page-about .team-map {
  display: block;
  width: 100%;
  height: auto;
  margin-bottom: 1.1rem;
}

.page-about .team-link {
  stroke: rgba(53, 242, 208, 0.4);
  stroke-width: 2;
  stroke-dasharray: 6 5;
}

.page-about .team-hub {
  fill: var(--m8-turf);
  stroke: var(--m8-cyan);
  stroke-width: 2;
}

.page-about .team-hub-text {
  fill: var(--m8-warm);
  font-family: var(--m8-font-head);
  font-size: 16px;
  font-weight: 700;
  text-anchor: middle;
}

.page-about .team-hub-sub {
  fill: var(--m8-mist);
  font-family: var(--m8-font-body);
  font-size: 12px;
  text-anchor: middle;
}

.page-about .team-node {
  fill: rgba(4, 31, 25, 0.9);
  stroke: rgba(169, 194, 183, 0.35);
  stroke-width: 1.5;
}

.page-about .team-node-text {
  fill: var(--m8-cyan);
  font-family: var(--m8-font-head);
  font-size: 16px;
  font-weight: 700;
  text-anchor: middle;
}

.page-about .team-roster {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.8rem;
}

.page-about .team-roster li {
  display: grid;
  grid-template-columns: auto auto minmax(0, 1fr);
  gap: 0.5rem;
  align-items: baseline;
  padding-bottom: 0.8rem;
  border-bottom: 1px dashed var(--m8-line-soft);
  font-size: 0.84rem;
  line-height: 1.75;
  color: var(--m8-mist);
}

.page-about .team-roster li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .team-roster .num {
  font-family: var(--m8-font-num);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--m8-orange);
}

.page-about .team-roster strong {
  color: var(--m8-warm);
  font-weight: 700;
}

/* ---------- 04 服务节奏 ---------- */
.page-about .about-service {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-service-main {
  border-radius: var(--m8-radius-lg);
  background: linear-gradient(155deg, var(--m8-panel), rgba(4, 31, 25, 0.9));
  border: 1px solid var(--m8-line-soft);
  padding: clamp(1.1rem, 3vw, 1.75rem);
}

.page-about .about-service-title {
  margin: 0 0 0.9rem;
  font-family: var(--m8-font-num);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--m8-cyan);
}

.page-about .city-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
}

.page-about .about-service-text {
  margin: 0;
  font-size: 0.87rem;
  line-height: 1.85;
  color: var(--m8-mist);
}

.page-about .about-service-stats {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.page-about .about-service-stats .stat {
  display: grid;
  gap: 0.35rem;
  padding: 0.9rem 0.85rem;
  border-radius: var(--m8-radius-sm);
  background: rgba(19, 91, 70, 0.28);
  border-left: 3px solid var(--m8-cyan);
}

.page-about .about-service-stats .stat-num {
  font-family: var(--m8-font-num);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--m8-warm);
  line-height: 1;
}

.page-about .about-service-stats .stat-label {
  font-size: 0.75rem;
  line-height: 1.6;
  color: var(--m8-mist);
}

/* ---------- 05 场景 ---------- */
.page-about .about-scenes {
  display: grid;
  gap: var(--about-gap);
}

.page-about .scene-card {
  position: relative;
  padding: 1.3rem 1.2rem 1.4rem;
  border-radius: var(--m8-radius-md);
  background: var(--about-card);
  border: 1px solid var(--m8-line-soft);
  transition: transform 0.25s var(--m8-ease), border-color 0.25s var(--m8-ease);
}

.page-about .scene-card:hover {
  transform: translateY(-4px);
  border-color: var(--m8-line-strong);
}

.page-about .scene-no {
  margin: 0 0 0.6rem;
  font-family: var(--m8-font-num);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  color: rgba(255, 138, 61, 0.85);
}

.page-about .scene-title {
  margin: 0 0 0.55rem;
  font-family: var(--m8-font-head);
  font-weight: 800;
  font-size: 1.05rem;
  line-height: 1.5;
  color: var(--m8-warm);
}

.page-about .scene-card p {
  margin: 0 0 1rem;
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--m8-mist);
}

.page-about .scene-link {
  display: inline-block;
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--m8-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 242, 208, 0.5);
  padding-bottom: 2px;
}

.page-about .scene-link:hover,
.page-about .scene-link:focus-visible {
  color: var(--m8-orange);
  border-bottom-color: var(--m8-orange);
}

/* ---------- 06 联系 ---------- */
.page-about .about-section--last {
  padding-top: clamp(1.5rem, 4vw, 2.5rem);
  border-top: 1px solid var(--m8-line-soft);
}

.page-about .about-contact {
  display: grid;
  gap: var(--about-gap);
}

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

.page-about .about-contact-title {
  margin: 0 0 0.75rem;
  font-family: var(--m8-font-head);
  font-weight: 800;
  font-size: 1rem;
  color: var(--m8-warm);
}

.page-about .about-contact-list {
  list-style: none;
  margin: 0 0 1.25rem;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.page-about .about-contact-list li {
  position: relative;
  padding-left: 1.1rem;
  font-size: 0.85rem;
  line-height: 1.75;
  color: var(--m8-mist);
}

.page-about .about-contact-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6rem;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--m8-cyan);
}

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

.page-about .about-contact-card {
  min-width: 0;
  padding: clamp(1.1rem, 3vw, 1.6rem);
  border-radius: var(--m8-radius-lg);
  background: linear-gradient(160deg, rgba(19, 91, 70, 0.5), rgba(2, 18, 15, 0.85));
  border: 1px solid var(--m8-line-strong);
}

.page-about .about-contact-card .footer-contact-row {
  display: grid;
  gap: 0.2rem;
  padding: 0.6rem 0;
  border-bottom: 1px dashed var(--m8-line-soft);
  font-size: 0.85rem;
  word-break: break-word;
}

.page-about .about-contact-card .footer-contact-row span:first-child {
  font-family: var(--m8-font-num);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--m8-orange-soft);
}

.page-about .about-contact-card .footer-contact-row a,
.page-about .about-contact-card .footer-contact-row span:last-child {
  color: var(--m8-warm);
  text-decoration: none;
  line-height: 1.6;
}

.page-about .about-contact-card .footer-contact-row a:hover,
.page-about .about-contact-card .footer-contact-row a:focus-visible {
  color: var(--m8-cyan);
  text-decoration: underline;
}

.page-about .about-contact-note {
  margin: 0.9rem 0 0;
  font-size: 0.78rem;
  line-height: 1.75;
  color: var(--m8-mist);
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 720px) {
  .page-about .about-note-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-note-grid .about-note:first-child {
    grid-column: span 2;
  }
  .page-about .about-scenes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-about .about-hero-media {
    margin-top: clamp(1rem, 4vw, 3.5rem);
    transform: translateY(0.5rem);
  }

  .page-about .about-body {
    grid-template-columns: minmax(210px, 260px) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 6.5rem;
    padding: 1.15rem 1.15rem 1.3rem;
  }

  .page-about .about-index .toc-list {
    flex-direction: column;
    gap: 0.3rem;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-index .toc-list a {
    display: flex;
    width: 100%;
    border-radius: 0 var(--m8-radius-sm) var(--m8-radius-sm) 0;
    border-left: 3px solid transparent;
    border-top-color: transparent;
    border-right-color: transparent;
    border-bottom-color: transparent;
    padding: 0.55rem 0.7rem;
  }

  .page-about .about-index .toc-list a[aria-current="true"] {
    border-left-color: var(--m8-cyan);
    border-radius: 0 var(--m8-radius-sm) var(--m8-radius-sm) 0;
  }

  .page-about .about-note-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-note-grid .about-note:first-child {
    grid-column: span 1;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }

  .page-about .about-service {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

  .page-about .about-service-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-scenes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-contact {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-hero h1 {
    max-width: 15ch;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero-media figcaption {
    padding: 1rem 1.25rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .scene-card,
  .page-about .timeline-panel,
  .page-about .about-index .toc-list a {
    transition: none;
  }
  .page-about .scene-card:hover {
    transform: none;
  }
}