.page-about {
  background: var(--paper-cream);
  color: var(--ink-brown);
  --about-timeline: 38px;
  --about-line: rgba(59, 44, 38, 0.18);
  --about-text-soft: #5A4639;
}

/* ---------- 页面头 ---------- */
.page-about .page-head {
  position: relative;
  background: var(--ink-black);
  color: var(--soft-white);
  padding: 2.2rem 0 2.6rem;
  overflow: hidden;
}

.page-about .page-head::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.55;
  background-image:
    linear-gradient(rgba(242, 235, 221, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(242, 235, 221, 0.05) 1px, transparent 1px);
  background-size: 34px 34px;
}

.page-about .page-head::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--neon-green) 0%, var(--electric-purple) 55%, transparent 100%);
}

.page-about .page-head__inner {
  position: relative;
  z-index: 1;
}

.page-about .page-head .breadcrumb {
  color: var(--muted-gray);
  margin-bottom: 1.6rem;
}

.page-about .page-head .breadcrumb-item {
  color: rgba(242, 235, 221, 0.72);
  text-decoration: none;
  transition: color 0.2s;
}

.page-about .page-head a.breadcrumb-item:hover {
  color: var(--neon-green);
}

.page-about .page-head .breadcrumb-sep {
  margin: 0 0.45em;
  color: rgba(242, 235, 221, 0.4);
}

.page-about .page-head .breadcrumb-item.is-current {
  color: var(--neon-green);
}

.page-about .page-head__kicker {
  margin-bottom: 0.75rem;
  color: var(--data-blue);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
}

.page-about .page-title {
  max-width: 960px;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 4vw, 2.9rem);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: 0.01em;
  color: var(--soft-white);
}

.page-about .page-intro {
  max-width: 780px;
  margin: 1.1rem 0 0;
  padding-left: 1.1rem;
  border-left: 3px solid var(--electric-purple);
  color: rgba(242, 235, 221, 0.78);
  font-size: 0.97rem;
  line-height: 1.85;
}

.page-about .page-head__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.page-about .page-head__tags .tag {
  border-color: rgba(242, 235, 221, 0.25);
  background: rgba(242, 235, 221, 0.07);
  color: rgba(242, 235, 221, 0.85);
}

.page-about .page-head__tags .tag--green {
  border-color: rgba(57, 255, 20, 0.42);
  background: rgba(57, 255, 20, 0.12);
  color: var(--neon-green);
}

.page-about .page-head__tags .tag--purple {
  border-color: rgba(138, 43, 226, 0.5);
  background: rgba(138, 43, 226, 0.2);
  color: #D3AFFF;
}

/* ---------- 本页目录 ---------- */
.page-about .page-toc {
  position: relative;
  z-index: 30;
  border-bottom: 1px solid var(--about-line);
  background: var(--cream-deep);
}

.page-about .page-toc__inner {
  display: flex;
  align-items: center;
  gap: 0.4rem 0.6rem;
  padding-top: 0.7rem;
  padding-bottom: 0.7rem;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-about .page-toc__inner::-webkit-scrollbar {
  display: none;
}

.page-about .page-toc__label {
  flex-shrink: 0;
  margin-right: 0.5rem;
  color: var(--muted-gray);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
}

.page-about .page-toc__link {
  display: inline-flex;
  flex-shrink: 0;
  align-items: center;
  gap: 0.35em;
  padding: 0.28rem 0.6rem;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--ink-brown);
  font-size: 0.82rem;
  text-decoration: none;
  transition: border-color 0.25s, color 0.25s, background 0.25s;
}

.page-about .page-toc__link:hover {
  border-color: var(--electric-purple);
  color: var(--electric-purple);
}

.page-about .page-toc__num {
  color: var(--electric-purple);
  font-size: 0.72rem;
}

.page-about .page-toc__link.is-active {
  background: var(--ink-black);
  border-color: var(--ink-black);
  color: var(--neon-green);
}

.page-about .page-toc__link.is-active .page-toc__num {
  color: var(--neon-green);
}

/* ---------- 品牌档案 ---------- */
.page-about .brand-archive {
  padding: 2.6rem 0 1.8rem;
}

.page-about .brand-archive .grid-side {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  align-items: stretch;
}

.page-about .brand-archive__card {
  position: relative;
  padding: clamp(1.3rem, 3vw, 2.1rem);
  border-radius: 3px;
  overflow: hidden;
}

.page-about .brand-archive__card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  height: 3px;
  width: 52px;
  background: var(--neon-green);
}

.page-about .brand-archive__card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.4rem;
}

.page-about .brand-archive__card-code {
  color: var(--muted-gray);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
}

.page-about .brand-archive__title {
  margin: 0 0 0.3rem;
  font-family: var(--font-display);
  font-size: 1.55rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--soft-white);
}

.page-about .brand-archive__lead {
  margin: 0 0 1rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px solid rgba(242, 235, 221, 0.14);
  color: var(--neon-green);
  font-size: 0.88rem;
  letter-spacing: 0.03em;
}

.page-about .brand-archive__text {
  margin: 0 0 1.4rem;
  color: rgba(242, 235, 221, 0.75);
  font-size: 0.9rem;
  line-height: 1.85;
}

.page-about .brand-archive__meta {
  display: grid;
  gap: 0.7rem;
  margin: 0;
}

.page-about .meta-row {
  display: grid;
  grid-template-columns: 78px 1fr;
  gap: 0.75rem;
  font-size: 0.84rem;
}

.page-about .meta-row dt {
  color: var(--data-blue);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  padding-top: 0.2em;
}

.page-about .meta-row dd {
  margin: 0;
  color: rgba(242, 235, 221, 0.84);
  line-height: 1.65;
}

.page-about .brand-archive__notes {
  display: flex;
  flex-direction: column;
  padding: clamp(1.2rem, 3vw, 1.9rem);
  border: 1px solid rgba(59, 44, 38, 0.16);
  border-left: 4px solid var(--electric-purple);
  background: var(--cream-deep);
}

.page-about .brand-archive__notes-label {
  margin: 0 0 0.9rem;
  color: var(--electric-purple);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
}

.page-about .fact-list {
  display: grid;
  gap: 0;
  margin: 0 0 1.3rem;
  padding: 0;
  list-style: none;
}

.page-about .fact-list__item {
  display: grid;
  grid-template-columns: 18px 1fr;
  gap: 0.7rem;
  padding: 0.85rem 0;
  border-bottom: 1px dashed rgba(59, 44, 38, 0.18);
}

.page-about .fact-list__item:first-child {
  padding-top: 0.1rem;
}

.page-about .fact-list__item:last-child {
  border-bottom: 0;
  padding-bottom: 0.2rem;
}

.page-about .fact-list__dot {
  width: 9px;
  height: 9px;
  margin-top: 0.55em;
  border-radius: 50%;
  background: var(--neon-green);
  box-shadow: 0 0 10px rgba(57, 255, 20, 0.45);
}

.page-about .fact-list__body strong {
  display: block;
  color: var(--ink-brown);
  font-family: var(--font-display);
  font-size: 0.94rem;
  font-weight: 800;
  letter-spacing: 0.01em;
}

.page-about .fact-list__body p {
  margin: 0.3rem 0 0;
  color: var(--about-text-soft);
  font-size: 0.85rem;
  line-height: 1.7;
}

.page-about .brand-archive__foot {
  margin-top: auto;
  color: var(--about-text-soft);
  font-size: 0.84rem;
  line-height: 1.8;
}

.page-about .brand-archive__foot a {
  color: var(--electric-purple);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 区块头 ---------- */
.page-about .section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 0.2rem 0.9rem;
  margin-bottom: 1.6rem;
}

.page-about .section-index {
  padding-top: 0.35rem;
  color: var(--electric-purple);
  font-size: 0.85rem;
}

.page-about .section-head__title-group {
  flex: 1 1 260px;
}

.page-about .section-title {
  margin: 0;
  color: var(--ink-brown);
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 3vw, 1.9rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: 0.02em;
}

.page-about .section-sub {
  margin: 0.45rem 0 0;
  max-width: 62ch;
  color: var(--about-text-soft);
  font-size: 0.87rem;
  line-height: 1.75;
}

.page-about .section-line {
  flex-basis: 100%;
  height: 1px;
  margin-top: 0.55rem;
  background: repeating-linear-gradient(90deg, rgba(59, 44, 38, 0.5) 0, rgba(59, 44, 38, 0.5) 6px, transparent 6px, transparent 12px);
}

/* ---------- 发展里程碑 ---------- */
.page-about .milestone-section {
  padding: 2.4rem 0 3rem;
}

.page-about .milestone-banner {
  margin-bottom: 2.2rem;
  aspect-ratio: 21 / 9;
  overflow: hidden;
  border: 1px solid rgba(59, 44, 38, 0.18);
  background: var(--ink-black);
}

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

.page-about .timeline {
  position: relative;
  display: grid;
  gap: 1.1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .timeline::before {
  content: '';
  position: absolute;
  top: 1.3rem;
  bottom: 1.3rem;
  left: calc(var(--about-timeline) / 2);
  width: 2px;
  transform: translateX(-50%);
  background: linear-gradient(to bottom, var(--neon-green), rgba(0, 200, 255, 0.45) 32%, rgba(59, 44, 38, 0.18) 100%);
}

.page-about .timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: var(--about-timeline) 1fr;
  gap: 0.8rem;
}

.page-about .timeline-rail {
  display: flex;
  justify-content: center;
  position: relative;
}

.page-about .timeline-dot {
  flex-shrink: 0;
  width: 13px;
  height: 13px;
  margin-top: 1.25rem;
  border-radius: 50%;
  background: var(--neon-green);
  box-shadow: 0 0 0 4px rgba(57, 255, 20, 0.14), 0 0 14px rgba(57, 255, 20, 0.45);
  position: relative;
  z-index: 1;
}

.page-about .timeline-item:nth-child(2) .timeline-dot {
  background: var(--data-blue);
  box-shadow: 0 0 0 4px rgba(0, 200, 255, 0.16), 0 0 14px rgba(0, 200, 255, 0.4);
}

.page-about .timeline-item:nth-child(3) .timeline-dot {
  background: var(--electric-purple);
  box-shadow: 0 0 0 4px rgba(138, 43, 226, 0.18), 0 0 14px rgba(138, 43, 226, 0.45);
}

.page-about .timeline-item:nth-child(4) .timeline-dot {
  background: var(--data-blue);
  box-shadow: 0 0 0 4px rgba(0, 200, 255, 0.16), 0 0 14px rgba(0, 200, 255, 0.4);
}

.page-about .timeline-item:nth-child(5) .timeline-dot {
  background: var(--signal-orange);
  box-shadow: 0 0 0 4px rgba(255, 77, 0, 0.16), 0 0 14px rgba(255, 77, 0, 0.4);
}

.page-about .timeline-card {
  margin: 0;
  border: 1px solid rgba(59, 44, 38, 0.2);
  border-radius: 3px;
  background: var(--paper-cream);
  transition: border-color 0.25s, box-shadow 0.25s;
}

.page-about .timeline-card:hover {
  border-color: var(--electric-purple);
  box-shadow: 0 8px 30px rgba(138, 43, 226, 0.12);
}

.page-about .timeline-card__summary {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem 0.8rem;
  padding: 0.95rem 1.1rem;
  cursor: pointer;
  list-style: none;
}

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

.page-about .timeline-version {
  padding: 0.18rem 0.5rem;
  border-radius: 2px;
  background: var(--ink-black);
  color: var(--neon-green);
  font-family: var(--font-mono);
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.page-about .timeline-item:nth-child(2) .timeline-version {
  color: var(--data-blue);
}

.page-about .timeline-item:nth-child(3) .timeline-version {
  color: #C49BF5;
}

.page-about .timeline-item:nth-child(4) .timeline-version {
  color: var(--data-blue);
}

.page-about .timeline-item:nth-child(5) .timeline-version {
  color: var(--signal-orange);
}

.page-about .timeline-card__title {
  margin: 0;
  color: var(--ink-brown);
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
}

.page-about .timeline-card__tag {
  margin-left: auto;
}

.page-about .timeline-card__body {
  margin-top: 0.2rem;
  padding: 0 1.1rem 1rem;
  border-top: 1px dashed rgba(59, 44, 38, 0.16);
}

.page-about .timeline-card__body p {
  margin: 0.8rem 0 0;
  color: var(--about-text-soft);
  font-size: 0.87rem;
  line-height: 1.8;
}

/* ---------- 数据服务能力 ---------- */
.page-about .capability-section {
  position: relative;
  overflow: hidden;
  padding: 2.8rem 0 3.2rem;
  background: var(--ink-black);
  color: var(--soft-white);
}

.page-about .capability-section::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.4;
  background-image:
    linear-gradient(rgba(242, 235, 221, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(242, 235, 221, 0.05) 1px, transparent 1px);
  background-size: 40px 40px;
}

.page-about .capability-section > .container {
  position: relative;
  z-index: 1;
}

.page-about .capability-section .section-title {
  color: var(--soft-white);
}

.page-about .capability-section .section-sub {
  color: rgba(242, 235, 221, 0.66);
}

.page-about .capability-section .section-index {
  color: var(--neon-green);
}

.page-about .capability-section .section-line {
  background: repeating-linear-gradient(90deg, rgba(242, 235, 221, 0.4) 0, rgba(242, 235, 221, 0.4) 6px, transparent 6px, transparent 12px);
}

.page-about .capability-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.4rem;
}

.page-about .capability-visual {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid rgba(242, 235, 221, 0.14);
  background: #000;
}

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

.page-about .capability-grid {
  display: grid;
  gap: 1rem;
}

.page-about .capability-card {
  position: relative;
  overflow: hidden;
  padding: 1.3rem 1.2rem 1.4rem;
  border: 1px solid rgba(242, 235, 221, 0.15);
  border-radius: 3px;
  background: rgba(242, 235, 221, 0.06);
  color: rgba(242, 235, 221, 0.8);
  transition: border-color 0.3s, box-shadow 0.3s, transform 0.3s;
}

.page-about .capability-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--data-blue);
}

.page-about .capability-card--rank::before {
  background: var(--neon-green);
}

.page-about .capability-card--meta::before {
  background: var(--electric-purple);
}

.page-about .capability-card:hover {
  transform: translateY(-3px);
  border-color: var(--data-blue);
  box-shadow: 0 0 0 1px rgba(0, 200, 255, 0.35), 0 0 26px rgba(0, 200, 255, 0.16);
}

.page-about .capability-card--rank:hover {
  border-color: var(--neon-green);
  box-shadow: 0 0 0 1px rgba(57, 255, 20, 0.35), 0 0 26px rgba(57, 255, 20, 0.16);
}

.page-about .capability-card--meta:hover {
  border-color: var(--electric-purple);
  box-shadow: 0 0 0 1px rgba(138, 43, 226, 0.45), 0 0 26px rgba(138, 43, 226, 0.18);
}

.page-about .capability-card__index {
  display: inline-block;
  margin-bottom: 0.95rem;
  color: rgba(242, 235, 221, 0.5);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
}

.page-about .capability-card__icon {
  display: block;
  width: 32px;
  height: 32px;
  margin-bottom: 0.85rem;
  color: var(--data-blue);
}

.page-about .capability-card--rank .capability-card__icon {
  color: var(--neon-green);
}

.page-about .capability-card--meta .capability-card__icon {
  color: #C49BF5;
}

.page-about .capability-card h3 {
  margin: 0 0 0.5rem;
  color: var(--soft-white);
  font-family: var(--font-display);
  font-size: 1.03rem;
  font-weight: 700;
}

.page-about .capability-card p {
  margin: 0;
  color: rgba(242, 235, 221, 0.72);
  font-size: 0.85rem;
  line-height: 1.8;
}

/* ---------- 团队与组织 ---------- */
.page-about .team-section {
  padding: 2.8rem 0 3.2rem;
}

.page-about .team-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

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

.page-about .team-card {
  display: flex;
  flex-direction: column;
  padding: 1.2rem 1.25rem;
  border: 1px solid rgba(59, 44, 38, 0.16);
  border-left: 4px solid var(--electric-purple);
  border-radius: 3px;
  background: var(--paper-cream);
  transition: border-color 0.25s, box-shadow 0.25s;
}

.page-about .team-card:hover {
  border-color: var(--electric-purple);
  box-shadow: 0 10px 30px rgba(138, 43, 226, 0.12);
}

.page-about .team-card__code {
  margin-bottom: 0.4rem;
  color: var(--electric-purple);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
}

.page-about .team-card h3 {
  margin: 0 0 0.5rem;
  color: var(--ink-brown);
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
}

.page-about .team-card p {
  margin: 0 0 0.7rem;
  color: var(--about-text-soft);
  font-size: 0.86rem;
  line-height: 1.75;
}

.page-about .team-card .text-link {
  margin-top: auto;
  align-self: flex-start;
  color: var(--electric-purple);
  font-size: 0.82rem;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.2s;
}

.page-about .team-card .text-link:hover {
  color: var(--neon-green);
}

.page-about .team-visual {
  position: relative;
  min-height: 240px;
  overflow: hidden;
  border: 1px solid rgba(59, 44, 38, 0.16);
  background: var(--ink-black);
}

.page-about .team-visual img {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 合规声明 ---------- */
.page-about .compliance-section {
  padding: 2rem 0 3rem;
}

.page-about .compliance-banner {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem 1.1rem;
  align-items: center;
  padding: 1.35rem 1.3rem;
  border: 1px solid var(--signal-orange);
  border-left-width: 6px;
  border-radius: 3px;
  background: var(--ink-black);
  color: var(--soft-white);
  box-shadow: 0 0 0 1px rgba(255, 77, 0, 0.12), 0 12px 40px rgba(255, 77, 0, 0.08);
}

.page-about .compliance-banner__icon {
  width: 40px;
  height: 40px;
  color: var(--signal-orange);
}

.page-about .compliance-banner__title {
  margin: 0 0 0.4rem;
  color: var(--soft-white);
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
}

.page-about .compliance-banner__content p {
  margin: 0;
  color: rgba(242, 235, 221, 0.76);
  font-size: 0.87rem;
  line-height: 1.8;
}

.page-about .compliance-banner .btn {
  grid-column: 2;
  justify-self: start;
}

.page-about .compliance-banner .btn-ghost {
  border-color: rgba(242, 235, 221, 0.35);
  color: var(--soft-white);
}

.page-about .compliance-banner .btn-ghost:hover {
  border-color: var(--neon-green);
  color: var(--neon-green);
}

.page-about .compliance-meta {
  margin: 1.1rem 0 0;
  color: var(--muted-gray);
  font-size: 0.74rem;
  line-height: 1.7;
  text-align: center;
  letter-spacing: 0.03em;
}

.page-about .compliance-meta a {
  color: var(--electric-purple);
  text-decoration: none;
}

.page-about .compliance-meta a:hover {
  color: var(--neon-green);
}

/* ---------- 平板增强 ---------- */
@media (min-width: 720px) {
  .page-about .page-toc {
    position: sticky;
    top: var(--header-h);
  }

  .page-about .compliance-banner {
    grid-template-columns: auto 1fr auto;
    padding: 1.6rem 1.8rem;
  }

  .page-about .compliance-banner .btn {
    grid-column: 3;
  }
}

/* ---------- 桌面增强 ---------- */
@media (min-width: 900px) {
  .page-about .brand-archive .grid-side {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 2.2rem;
  }

  .page-about .capability-layout {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 2rem;
  }

  .page-about .capability-visual {
    aspect-ratio: 1 / 1;
  }

  .page-about .capability-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.1rem;
  }

  .page-about .capability-card--meta {
    grid-column: 1 / -1;
  }

  .page-about .team-layout {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 2rem;
    align-items: stretch;
  }

  .page-about .team-visual {
    min-height: 100%;
  }
}