.page-about {
  --about-pad: clamp(18px, 4vw, 40px);
  --about-axis-w: 92px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: calc(var(--header-space) + 34px) 0 clamp(40px, 6vw, 78px);
  background: var(--ink-deep);
  color: var(--paper);
  overflow: hidden;
}

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

.page-about .about-hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.28;
  filter: saturate(0.7);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    repeating-linear-gradient(90deg, var(--grid-line) 0 1px, transparent 1px 32px),
    linear-gradient(118deg, rgba(8, 23, 38, 0.96) 0%, rgba(8, 23, 38, 0.82) 46%, rgba(18, 48, 74, 0.62) 100%);
}

.page-about .about-hero-inner {
  position: relative;
  z-index: 2;
}

.page-about .about-hero .breadcrumb {
  margin-bottom: 22px;
}

.page-about .about-hero .breadcrumb a,
.page-about .about-hero .breadcrumb li {
  color: var(--text-on-dark-dim);
}

.page-about .about-hero .breadcrumb a:hover {
  color: var(--amber);
}

.page-about .about-hero .eyebrow {
  color: var(--amber);
  display: block;
  margin-bottom: 14px;
}

.page-about .about-hero h1 {
  font-size: clamp(28px, 4.4vw, 48px);
  line-height: 1.24;
  letter-spacing: -0.02em;
  color: var(--paper);
  max-width: 19em;
  margin: 0 0 22px;
}

.page-about .about-lead {
  font-family: var(--font-body);
  font-size: var(--fs-16);
  line-height: var(--lh-read);
  color: var(--text-on-dark);
  max-width: 38em;
  margin: 0 0 34px;
}

.page-about .about-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-top: 1px solid var(--hair-soft);
  border-left: 1px solid var(--hair-soft);
}

.page-about .about-hero-meta-item {
  flex: 1 1 180px;
  padding: 16px 20px;
  border-right: 1px solid var(--hair-soft);
  border-bottom: 1px solid var(--hair-soft);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-hero-meta-item .num {
  font-size: var(--fs-26);
  color: var(--amber);
  letter-spacing: 0.02em;
}

.page-about .about-hero-meta-label {
  font-size: var(--fs-12);
  color: var(--text-on-dark-dim);
  letter-spacing: 0.06em;
}

/* ---------- 我们在做什么 ---------- */
.page-about .about-what-grid {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  grid-template-columns: 1fr;
}

.page-about .about-what-main h2 {
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--text-ink);
  margin: 8px 0 20px;
  max-width: 16em;
}

.page-about .about-what-main p {
  font-family: var(--font-body);
  font-size: var(--fs-16);
  line-height: var(--lh-read);
  color: var(--text-ink);
  max-width: 36em;
  margin: 0 0 1.2em;
}

.page-about .about-what-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  border-top: 2px solid var(--line-strong);
}

.page-about .about-what-list li {
  display: flex;
  gap: 14px;
  align-items: baseline;
  padding: 13px 0;
  border-bottom: 1px solid var(--hair-soft);
  font-size: var(--fs-14);
  line-height: var(--lh-base);
  color: var(--text-ink);
}

.page-about .about-what-list .mono {
  color: var(--amber);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
}

.page-about .about-what-side {
  background: var(--paper-warm);
  border: 3px solid var(--line-strong);
  box-shadow: var(--shadow-brutal);
  padding: 24px 22px;
}

.page-about .about-what-side .eyebrow {
  display: block;
  color: var(--slate);
  margin-bottom: 16px;
}

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

.page-about .about-audience dt {
  font-family: var(--font-heading);
  font-size: var(--fs-16);
  color: var(--text-ink);
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--hair-soft);
}

.page-about .about-audience dt:first-of-type {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.page-about .about-audience dd {
  margin: 6px 0 0;
  font-size: var(--fs-14);
  line-height: var(--lh-base);
  color: var(--text-muted);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline-band {
  background: var(--ink-deep);
  color: var(--paper);
  position: relative;
  overflow: hidden;
}

.page-about .about-timeline-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(0deg, var(--grid-line) 0 1px, transparent 1px 32px);
  pointer-events: none;
}

.page-about .about-timeline-band .shell {
  position: relative;
  z-index: 1;
}

.page-about .about-timeline-band .eyebrow {
  color: var(--amber);
  display: block;
  margin-bottom: 12px;
}

.page-about .about-timeline-band h2 {
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--paper);
  margin: 0 0 18px;
  max-width: 20em;
}

.page-about .about-timeline-lead {
  font-family: var(--font-body);
  font-size: var(--fs-16);
  line-height: var(--lh-read);
  color: var(--text-on-dark);
  max-width: 36em;
  margin: 0 0 clamp(28px, 4vw, 48px);
}

.page-about .about-axis {
  list-style: none;
  margin: 0;
  padding: 0 0 0 22px;
  position: relative;
}

.page-about .about-axis::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(180deg, var(--blueprint) 0%, var(--amber) 62%, var(--signal) 100%);
}

.page-about .about-axis-node {
  position: relative;
  padding: 0 0 clamp(26px, 3.4vw, 42px) 0;
}

.page-about .about-axis-node:last-child {
  padding-bottom: 0;
}

.page-about .about-axis-year {
  display: block;
  font-size: var(--fs-12);
  letter-spacing: 0.14em;
  color: var(--blueprint);
  margin-bottom: 6px;
}

.page-about .about-axis-dot {
  position: absolute;
  left: -22px;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink-deep);
  border: 2px solid var(--amber);
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-axis-node-current .about-axis-dot {
  background: var(--signal);
  border-color: var(--signal);
  box-shadow: 0 0 0 4px rgba(242, 98, 46, 0.22);
}

.page-about .about-axis-body {
  border-left: 3px solid var(--hair-soft);
  padding: 2px 0 2px 16px;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-axis-node:hover .about-axis-body {
  border-left-color: var(--amber);
  transform: translateX(4px);
}

.page-about .about-axis-node:hover .about-axis-dot {
  background: var(--amber);
}

.page-about .about-axis-body h3 {
  font-size: var(--fs-20);
  line-height: 1.45;
  color: var(--paper);
  margin: 10px 0 10px;
}

.page-about .about-axis-body p {
  font-family: var(--font-body);
  font-size: var(--fs-14);
  line-height: var(--lh-read);
  color: var(--text-on-dark);
  margin: 0;
  max-width: 34em;
}

.page-about .about-timeline-more {
  font-family: var(--font-body);
  font-size: var(--fs-14);
  line-height: var(--lh-base);
  color: var(--text-on-dark-dim);
  margin: clamp(28px, 4vw, 44px) 0 0;
}

.page-about .about-timeline-more a {
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease);
}

.page-about .about-timeline-more a:hover {
  border-bottom-color: var(--amber);
}

/* ---------- 服务范围 ---------- */
.page-about .about-coverage-grid {
  display: grid;
  gap: clamp(26px, 4vw, 50px);
  grid-template-columns: 1fr;
  align-items: start;
}

.page-about .about-coverage-text h2 {
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--text-ink);
  margin: 8px 0 20px;
  max-width: 17em;
}

.page-about .about-coverage-text p {
  font-family: var(--font-body);
  font-size: var(--fs-16);
  line-height: var(--lh-read);
  color: var(--text-ink);
  max-width: 36em;
  margin: 0 0 1.2em;
}

.page-about .about-coverage-stats {
  display: grid;
  gap: 0;
  border-top: 2px solid var(--line-strong);
  margin: 26px 0 18px;
}

.page-about .about-coverage-stat {
  display: flex;
  gap: 16px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid var(--hair-soft);
}

.page-about .about-coverage-stat .num {
  font-size: var(--fs-26);
  color: var(--amber);
  min-width: 2.6em;
  letter-spacing: 0.02em;
}

.page-about .about-coverage-stat span:last-child {
  font-size: var(--fs-14);
  line-height: var(--lh-base);
  color: var(--text-muted);
}

.page-about .about-coverage-note {
  font-size: var(--fs-14);
  line-height: var(--lh-base);
  color: var(--text-muted);
  border-left: 3px solid var(--blueprint);
  padding-left: 14px;
  margin: 0;
}

.page-about .about-coverage-figure {
  border: 3px solid var(--line-strong);
  box-shadow: var(--shadow-brutal);
  background: var(--paper-warm);
}

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

.page-about .about-coverage-figure .figure-caption {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--slate);
  padding: 12px 14px;
  border-top: 1px solid var(--hair-soft);
  margin: 0;
  letter-spacing: 0.02em;
}

/* ---------- 团队 ---------- */
.page-about .about-team-lead {
  font-family: var(--font-body);
  font-size: var(--fs-16);
  line-height: var(--lh-read);
  color: var(--text-ink);
  max-width: 36em;
  margin: 0 0 clamp(26px, 3.6vw, 40px);
}

.page-about .about-team h2 {
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--text-ink);
  margin: 8px 0 18px;
  max-width: 18em;
}

.page-about .about-team-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: 1fr;
}

.page-about .about-team-card {
  position: relative;
  background: var(--paper);
  border: 2px solid var(--blueprint);
  padding: 24px 22px 22px;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-team-card-primary {
  border: 4px solid var(--line-strong);
  box-shadow: var(--shadow-brutal);
  background: var(--paper-warm);
}

.page-about .about-team-card:hover {
  border-color: var(--amber);
  transform: translateY(-4px);
  box-shadow: var(--shadow-soft);
}

.page-about .about-team-card-primary:hover {
  border-color: var(--line-strong);
  box-shadow: var(--shadow-brutal);
}

.page-about .about-team-card-index {
  display: inline-block;
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  color: var(--amber);
  border-bottom: 2px solid var(--amber);
  padding-bottom: 2px;
  margin-bottom: 14px;
}

.page-about .about-team-card h3 {
  font-size: var(--fs-20);
  line-height: 1.4;
  color: var(--text-ink);
  margin: 0 0 12px;
}

.page-about .about-team-card p {
  font-family: var(--font-body);
  font-size: var(--fs-14);
  line-height: var(--lh-read);
  color: var(--text-ink);
  margin: 0 0 12px;
}

.page-about .about-team-card-duty {
  color: var(--text-muted) !important;
  border-top: 1px solid var(--hair-soft);
  padding-top: 12px;
  margin-bottom: 0 !important;
}

.page-about .about-team-figure {
  margin: clamp(26px, 3.6vw, 42px) 0 0;
  border: 3px solid var(--line-strong);
  background: var(--ink-mid);
  overflow: hidden;
}

.page-about .about-team-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.8);
}

.page-about .about-team-figure .figure-caption {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--text-on-dark-dim);
  padding: 12px 16px;
  margin: 0;
  letter-spacing: 0.02em;
}

/* ---------- 版本 ---------- */
.page-about .about-version {
  background: var(--paper-warm);
  border-top: 3px solid var(--line-strong);
  border-bottom: 3px solid var(--line-strong);
}

.page-about .about-version-grid {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
  grid-template-columns: 1fr;
  align-items: start;
}

.page-about .about-version-text h2 {
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--text-ink);
  margin: 8px 0 18px;
  max-width: 15em;
}

.page-about .about-version-text p {
  font-family: var(--font-body);
  font-size: var(--fs-16);
  line-height: var(--lh-read);
  color: var(--text-ink);
  max-width: 36em;
  margin: 0 0 1.2em;
}

.page-about .about-version-link {
  font-size: var(--fs-14) !important;
  color: var(--text-muted) !important;
}

.page-about .about-version-link a {
  color: var(--ink-mid);
  text-decoration: none;
  border-bottom: 2px solid var(--amber);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-version-link a:hover {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

.page-about .about-version-panel {
  background: var(--paper);
  border: 3px solid var(--line-strong);
  box-shadow: var(--shadow-brutal);
  padding: 24px 22px;
}

.page-about .about-version-panel .eyebrow {
  display: block;
  color: var(--slate);
  margin-bottom: 16px;
}

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

.page-about .about-version-list li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 16px 0;
  border-top: 1px solid var(--hair-soft);
}

.page-about .about-version-list li:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-version-list .num {
  font-size: var(--fs-34);
  line-height: 1;
  color: var(--amber);
  min-width: 1.1em;
  letter-spacing: -0.02em;
}

.page-about .about-version-list strong {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--fs-16);
  color: var(--text-ink);
  margin-bottom: 6px;
}

.page-about .about-version-list p {
  font-family: var(--font-body);
  font-size: var(--fs-14);
  line-height: var(--lh-base);
  color: var(--text-muted);
  margin: 0;
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco h2 {
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--text-ink);
  margin: 8px 0 18px;
  max-width: 20em;
}

.page-about .about-eco-lead {
  font-family: var(--font-body);
  font-size: var(--fs-16);
  line-height: var(--lh-read);
  color: var(--text-ink);
  max-width: 38em;
  margin: 0 0 clamp(26px, 3.6vw, 42px);
}

.page-about .about-eco-layout {
  display: grid;
  gap: clamp(24px, 3.6vw, 44px);
  grid-template-columns: 1fr;
  align-items: center;
}

.page-about .about-eco-figure {
  background: var(--ink-deep);
  border: 3px solid var(--line-strong);
  box-shadow: var(--shadow-brutal);
  padding: 12px;
}

.page-about .about-eco-svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-eco-line {
  stroke: var(--blueprint);
  stroke-width: 1.5;
  stroke-dasharray: 5 4;
}

.page-about .about-eco-center {
  fill: var(--amber);
  stroke: var(--paper);
  stroke-width: 2;
}

.page-about .about-eco-center-text {
  fill: var(--ink-deep);
  font-family: var(--font-heading);
  font-size: 15px;
  text-anchor: middle;
  font-weight: 700;
}

.page-about .about-eco-center-sub {
  fill: var(--ink-deep);
  font-family: var(--font-mono);
  font-size: 10px;
  text-anchor: middle;
  letter-spacing: 0.1em;
}

.page-about .about-eco-node {
  fill: var(--ink-mid);
  stroke: var(--blueprint);
  stroke-width: 2;
  cursor: pointer;
  transition: fill var(--dur) var(--ease), stroke var(--dur) var(--ease);
}

.page-about .about-eco-node:hover {
  fill: var(--signal);
  stroke: var(--paper);
}

.page-about .about-eco-node-text {
  fill: var(--text-on-dark);
  font-family: var(--font-mono);
  font-size: 11px;
  text-anchor: middle;
  pointer-events: none;
  letter-spacing: 0.06em;
}

.page-about .about-eco-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--line-strong);
}

.page-about .about-eco-list li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 18px 0;
  border-bottom: 1px solid var(--hair-soft);
}

.page-about .about-eco-list strong {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--fs-16);
  color: var(--text-ink);
  margin-bottom: 6px;
}

.page-about .about-eco-list p {
  font-family: var(--font-body);
  font-size: var(--fs-14);
  line-height: var(--lh-base);
  color: var(--text-muted);
  margin: 0;
}

/* ---------- 合规 ---------- */
.page-about .about-compliance {
  display: grid;
  gap: 0;
  grid-template-columns: 1fr;
  margin-top: clamp(28px, 4vw, 48px);
  border-top: 3px solid var(--line-strong);
  border-left: 3px solid var(--line-strong);
}

.page-about .about-compliance-item {
  border-right: 3px solid var(--line-strong);
  border-bottom: 3px solid var(--line-strong);
  padding: 22px 20px;
  background: var(--paper);
}

.page-about .about-compliance-item .eyebrow {
  display: block;
  color: var(--slate);
  margin-bottom: 12px;
}

.page-about .about-compliance-item p {
  font-size: var(--fs-14);
  line-height: var(--lh-base);
  color: var(--text-ink);
  margin: 0 0 8px;
}

.page-about .about-compliance-item p:last-child {
  margin-bottom: 0;
}

.page-about .about-compliance-icp {
  font-size: var(--fs-16) !important;
  color: var(--ink-mid) !important;
  letter-spacing: 0.04em;
}

.page-about .about-compliance-note {
  color: var(--text-muted) !important;
  font-size: var(--fs-12) !important;
}

.page-about .about-eco-cta-line {
  font-family: var(--font-body);
  font-size: var(--fs-14);
  line-height: var(--lh-base);
  color: var(--text-muted);
  margin: clamp(24px, 3.4vw, 38px) 0 0;
}

.page-about .about-eco-cta-line a {
  color: var(--ink-mid);
  text-decoration: none;
  border-bottom: 2px solid var(--amber);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-eco-cta-line a:hover {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

.page-about .figure-10x7 {
  aspect-ratio: auto;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-team-card-primary {
    grid-column: span 2;
  }
  .page-about .about-eco-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 26px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding-top: calc(var(--header-space) + 52px);
  }
  .page-about .about-what-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
  }
  .page-about .about-what-side {
    margin-top: 62px;
  }
  .page-about .about-axis {
    padding-left: 0;
  }
  .page-about .about-axis::before {
    left: calc(var(--about-axis-w) - 1px);
  }
  .page-about .about-axis-node {
    display: grid;
    grid-template-columns: var(--about-axis-w) minmax(0, 1fr);
    column-gap: clamp(24px, 3.4vw, 44px);
    padding-bottom: clamp(30px, 3.6vw, 48px);
  }
  .page-about .about-axis-year {
    text-align: right;
    padding-top: 4px;
    margin-bottom: 0;
    color: var(--amber);
  }
  .page-about .about-axis-dot {
    left: calc(var(--about-axis-w) - 6px);
    top: 6px;
  }
  .page-about .about-axis-body {
    padding-left: 22px;
  }
  .page-about .about-coverage-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  }
  .page-about .about-coverage-figure {
    margin-top: 46px;
  }
  .page-about .about-team-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-team-card-primary {
    grid-column: auto;
    margin-top: -14px;
  }
  .page-about .about-team-card:nth-child(3) {
    margin-top: 14px;
  }
  .page-about .about-version-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  }
  .page-about .about-eco-layout {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  }
  .page-about .about-compliance {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero h1 {
    max-width: 17em;
  }
  .page-about .about-eco-list {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-axis-dot,
  .page-about .about-axis-body,
  .page-about .about-team-card,
  .page-about .about-eco-node {
    transition: none;
  }
  .page-about .about-axis-node:hover .about-axis-body {
    transform: none;
  }
  .page-about .about-team-card:hover {
    transform: none;
  }
}