.page-about {
  --about-text: #cbd7d0;
  --about-dim: #97a69f;
  position: relative;
  padding-bottom: 4.5rem;
  color: var(--about-text);
  font-family: var(--font-body);
}

.page-about .wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.page-about p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.9;
  color: var(--about-text);
}

.page-about h1 {
  margin: 0.65rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(2.05rem, 6.4vw, 4rem);
  line-height: 1.08;
  letter-spacing: -0.025em;
  font-weight: 800;
  color: var(--gold-soft);
  max-width: 15em;
}

.page-about h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.4vw, 2.3rem);
  line-height: 1.22;
  letter-spacing: -0.015em;
  color: var(--gold-soft);
}

.page-about h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.0625rem;
  line-height: 1.45;
  color: var(--gold-soft);
}

.page-about .breadcrumb {
  padding-block: 1.1rem 0.25rem;
}

.page-about .eyebrow {
  margin: 0 0 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .section-head {
  display: grid;
  gap: 0;
  margin-bottom: 1.75rem;
  max-width: 44rem;
}

.page-about .section-lead {
  margin-top: 0.9rem;
  max-width: 38rem;
  color: var(--about-dim);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: 1.5rem 2.75rem;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -34%;
  right: -26%;
  width: 74%;
  height: 152%;
  background: linear-gradient(
    155deg,
    rgba(138, 108, 255, 0.18) 0%,
    rgba(53, 200, 255, 0.09) 42%,
    rgba(6, 24, 20, 0) 72%
  );
  transform: rotate(9deg);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--gold) 0%, rgba(232, 180, 90, 0) 64%);
  opacity: 0.5;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 2rem;
}

.page-about .about-hero__lead {
  max-width: 33em;
  margin-top: 1.35rem;
  font-size: 1.0625rem;
  line-height: 1.95;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

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

.page-about .about-hero__figure .media {
  aspect-ratio: 7 / 5;
}

.page-about .about-hero__figure figcaption {
  margin-top: 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  line-height: 1.6;
  color: var(--about-dim);
}

/* ---------- 通用媒体容器 ---------- */
.page-about .media {
  position: relative;
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 1.25rem), calc(100% - 1.25rem) 100%, 0 100%);
}

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

/* ---------- 章节骨架 ---------- */
.page-about .about-section {
  position: relative;
  padding-block: 2.5rem;
}

/* ---------- 起点 ---------- */
.page-about .origin-grid {
  display: grid;
  gap: 1.75rem;
}

.page-about .origin-copy {
  display: grid;
  gap: 1.1rem;
  max-width: 40rem;
}

.page-about .route-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .route-list li {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: 0.85rem;
  align-items: baseline;
  padding-block: 0.9rem;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .route-idx {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-about .route-name {
  display: block;
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: 0.01em;
  color: var(--gold-soft);
}

.page-about .route-desc {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--about-dim);
}

/* ---------- 焕新版 ---------- */
.page-about .upgrade-grid {
  display: grid;
  gap: 2rem;
}

.page-about .upgrade-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.6rem;
  counter-reset: upg;
}

.page-about .upgrade-list li {
  position: relative;
  padding-left: 2.85rem;
}

.page-about .upgrade-list li::before {
  counter-increment: upg;
  content: "0" counter(upg);
  position: absolute;
  left: 0;
  top: 0.2rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-about .upgrade-list p {
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--about-dim);
}

.page-about .zone-panel {
  position: relative;
  padding: 1.5rem 1.35rem;
  background: linear-gradient(168deg, var(--panel-2) 0%, var(--panel) 100%);
  border: 1px solid var(--line-soft);
  clip-path: polygon(1.25rem 0, 100% 0, 100% calc(100% - 1.25rem), calc(100% - 1.25rem) 100%, 0 100%, 0 1.25rem);
}

.page-about .zone-panel h3 {
  margin-bottom: 1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.18em;
  color: var(--about-dim);
}

.page-about .zone-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.35rem 1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .zone-grid li {
  display: flex;
  gap: 0.5rem;
  align-items: baseline;
  padding-block: 0.42rem;
  border-bottom: 1px dashed var(--line-soft);
  font-size: 0.875rem;
  color: var(--gold-soft);
}

.page-about .zone-id {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--blue);
}

.page-about .zone-note {
  margin-top: 1.1rem;
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--about-dim);
}

/* ---------- 团队 ---------- */
.page-about .team-layout {
  display: grid;
  gap: 1.75rem;
}

.page-about .team-intro {
  display: grid;
  gap: 1.5rem;
  align-content: start;
}

.page-about .team-figure {
  margin: 0;
}

.page-about .team-figure .media {
  aspect-ratio: 3 / 2;
}

.page-about .team-figure figcaption {
  margin-top: 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  line-height: 1.6;
  color: var(--about-dim);
}

.page-about .team-cards {
  display: grid;
  gap: 1rem;
  align-content: start;
}

.page-about .team-card {
  padding: 1.2rem 1.15rem 1.3rem;
  background: var(--panel);
  border: 1px solid var(--line-soft);
  border-left: 2px solid var(--card-accent, var(--gold));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 1rem), calc(100% - 1rem) 100%, 0 100%);
  transition: box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .team-card:nth-child(1) {
  --card-accent: var(--gold);
}

.page-about .team-card:nth-child(2) {
  --card-accent: var(--blue);
}

.page-about .team-card:nth-child(3) {
  --card-accent: var(--rose);
}

.page-about .team-card:hover {
  box-shadow: 0 0 0 1px rgba(232, 180, 90, 0.22), 0 14px 34px -20px rgba(232, 180, 90, 0.6);
}

.page-about .card-idx {
  display: block;
  margin-bottom: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  color: var(--card-accent, var(--gold));
}

.page-about .team-card p {
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--about-dim);
}

.page-about .stat-strip {
  list-style: none;
  margin: 2rem 0 0;
  padding: 1.15rem 1.1rem;
  display: grid;
  gap: 0.9rem;
  background: linear-gradient(112deg, rgba(11, 36, 30, 0.95) 0%, rgba(6, 24, 20, 0.55) 100%);
  border: 1px solid var(--line);
  clip-path: polygon(0 0.75rem, 0.75rem 0, 100% 0, 100% calc(100% - 0.75rem), calc(100% - 0.75rem) 100%, 0 100%);
}

.page-about .stat-cell {
  display: grid;
  gap: 0.3rem;
}

.page-about .stat-num {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--gold);
}

.page-about .stat-label {
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--about-dim);
}

/* ---------- 时间轨道 ---------- */
.page-about .timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .tl-node {
  position: relative;
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr);
  gap: 0.9rem;
  padding-bottom: 1.15rem;
}

.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: 1.15rem;
  top: 1.6rem;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, var(--line) 0%, rgba(232, 180, 90, 0) 100%);
}

.page-about .tl-node:last-child::before {
  display: none;
}

.page-about .tl-idx {
  padding-top: 0.68rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-about .tl-node details {
  border-bottom: 1px solid var(--line-soft);
  padding-bottom: 0.6rem;
}

.page-about .tl-node summary {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 1.0625rem;
  line-height: 1.45;
  color: var(--gold-soft);
  transition: color var(--dur) var(--ease);
}

.page-about .tl-node summary::-webkit-details-marker {
  display: none;
}

.page-about .tl-node summary:hover,
.page-about .tl-node summary:focus-visible {
  color: var(--gold);
}

.page-about .tl-node summary::after {
  content: "+";
  margin-left: auto;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 1;
  color: var(--mint);
}

.page-about .tl-node details[open] summary::after {
  content: "–";
}

.page-about .tl-body {
  padding: 0.1rem 0 0.55rem;
}

.page-about .tl-body p {
  max-width: 40em;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--about-dim);
}

.page-about .tl-figure {
  margin: 0 0 1.4rem;
  padding-left: 0;
}

.page-about .tl-figure .media {
  aspect-ratio: 4 / 3;
}

.page-about .tl-figure figure {
  margin: 0;
}

.page-about .timeline-tail {
  margin-top: 1.5rem;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--about-dim);
}

.page-about .timeline-tail a {
  color: var(--gold);
  text-decoration: underline;
  text-underline-offset: 0.22em;
}

.page-about .timeline-tail a:hover {
  color: var(--gold-soft);
}

/* ---------- 服务习惯 ---------- */
.page-about .services {
  margin-top: 1rem;
}

.page-about .services::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    rgba(232, 180, 90, 0) 0%,
    var(--gold) 22%,
    var(--rose) 55%,
    var(--blue) 80%,
    rgba(53, 200, 255, 0) 100%
  );
  transform: rotate(-0.9deg);
  transform-origin: left center;
  pointer-events: none;
}

.page-about .habit-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.35rem;
}

.page-about .habit-item {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: 0.85rem;
  padding-top: 0.95rem;
  border-top: 1px solid var(--line-soft);
}

.page-about .habit-idx {
  padding-top: 0.2rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--mint);
}

.page-about .habit-item p {
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--about-dim);
}

/* ---------- 收束 ---------- */
.page-about .next-cta {
  position: relative;
  margin-top: 0.5rem;
  padding: 1.6rem 1.35rem;
  background: linear-gradient(140deg, rgba(11, 36, 30, 0.95) 0%, rgba(6, 24, 20, 0.78) 100%);
  border: 1px solid var(--line);
  clip-path: polygon(0 1.5rem, 1.5rem 0, 100% 0, 100% calc(100% - 1.5rem), calc(100% - 1.5rem) 100%, 0 100%);
}

.page-about .next-cta p {
  margin-top: 0.85rem;
  max-width: 40rem;
  font-size: 0.9375rem;
  line-height: 1.9;
  color: var(--about-dim);
}

.page-about .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.35rem;
}

/* ---------- 桌面端 ---------- */
@media (min-width: 62rem) {
  .page-about .breadcrumb {
    padding-block: 1.5rem 0.25rem;
  }

  .page-about .about-hero {
    padding-block: 2rem 4rem;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: 3.5rem;
    align-items: end;
  }

  .page-about .about-hero__figure {
    margin-top: 1.25rem;
  }

  .page-about .about-section {
    padding-block: 4rem;
  }

  .page-about .section-head {
    margin-bottom: 2.25rem;
  }

  .page-about .origin-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.72fr);
    gap: 3.25rem;
    align-items: start;
  }

  .page-about .upgrade-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.76fr);
    gap: 3.25rem;
    align-items: start;
  }

  .page-about .zone-panel {
    margin-top: 0.75rem;
    padding: 1.75rem 1.6rem;
  }

  .page-about .team-layout {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    gap: 3.25rem;
    align-items: start;
  }

  .page-about .team-cards {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 1rem;
  }

  .page-about .team-card:nth-child(1) {
    grid-column: span 5;
  }

  .page-about .team-card:nth-child(2) {
    grid-column: span 7;
  }

  .page-about .team-card:nth-child(3) {
    grid-column: span 9;
  }

  .page-about .stat-strip {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 1.25rem;
    padding: 1.5rem 1.75rem;
    margin-top: 2.75rem;
  }

  .page-about .stat-num {
    font-size: 1.75rem;
  }

  .page-about .tl-node {
    grid-template-columns: 5rem minmax(0, 1fr);
    gap: 2rem;
    padding-bottom: 1.5rem;
  }

  .page-about .tl-node::before {
    left: 2.5rem;
  }

  .page-about .tl-idx {
    padding-top: 0.72rem;
    font-size: 0.875rem;
  }

  .page-about .tl-node summary {
    font-size: 1.125rem;
  }

  .page-about .tl-figure {
    padding-left: 7rem;
    margin-bottom: 1.75rem;
  }

  .page-about .habit-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.6rem 3rem;
  }

  .page-about .next-cta {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 2.5rem;
    align-items: center;
    padding: 2.25rem 2.5rem;
  }

  .page-about .cta-actions {
    margin-top: 0;
    flex-wrap: nowrap;
  }
}

@media (min-width: 88rem) {
  .page-about .about-hero__grid {
    gap: 4.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card,
  .page-about .tl-node summary {
    transition: none;
  }
}