.page-about {
  --ab-gap: 72px;
  --ab-pad: 32px 18px;
  padding-bottom: 24px;
}

.page-about .container {
  position: relative;
}

/* ---------- 首屏 ---------- */
.page-about .ab-intro {
  padding: 26px 0 4px;
}

.page-about .ab-intro .eyebrow {
  margin: 0 0 14px;
}

.page-about .ab-intro h1 {
  max-width: 20ch;
  margin: 0 0 18px;
  line-height: 1.16;
}

.page-about .ab-intro .lead {
  max-width: 60ch;
  margin: 0;
}

.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 34px 0 0;
  background: var(--line-ghost);
  border: 1px solid var(--line-ghost);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .ab-stats .stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 14px;
  background: var(--panel-deep);
}

.page-about .ab-stats .stat-value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--cyan);
  line-height: 1;
}

.page-about .ab-stats .stat:nth-child(2) .stat-value {
  color: var(--lemon);
}

.page-about .ab-stats .stat:nth-child(3) .stat-value {
  color: var(--magenta);
}

.page-about .ab-stats .ab-plus {
  font-size: 20px;
  margin-left: 1px;
}

.page-about .ab-stats .stat-label {
  font-size: 13px;
  color: var(--slate);
  line-height: 1.5;
}

.page-about .ab-intro-note {
  display: block;
  margin: 14px 0 0;
  color: var(--slate);
  letter-spacing: 0.04em;
}

/* ---------- 章节锚点 ---------- */
.page-about .ab-anchor {
  display: flex;
  gap: 6px;
  margin: 36px 0 56px;
  padding: 10px 0;
  overflow-x: auto;
  border-top: 1px solid var(--line-ghost);
  border-bottom: 1px solid var(--line-ghost);
  scrollbar-width: none;
}

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

.page-about .ab-anchor .anchor-link {
  flex: 0 0 auto;
  padding: 8px 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--slate);
  text-decoration: none;
  white-space: nowrap;
  border: 1px solid transparent;
  border-radius: 999px;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.page-about .ab-anchor .anchor-link:hover {
  color: var(--mist);
  border-color: var(--line-soft);
}

.page-about .ab-anchor .anchor-link[aria-current="true"] {
  color: var(--lemon);
  background: rgba(255, 225, 77, 0.07);
  border-color: rgba(255, 225, 77, 0.42);
}

/* ---------- 章节骨架 ---------- */
.page-about .ab-sec {
  margin-bottom: var(--ab-gap);
}

.page-about .ab-sec .section-head {
  margin-bottom: 26px;
}

.page-about .ab-sec .section-head .eyebrow {
  margin: 0 0 10px;
}

.page-about .ab-sec .section-title {
  max-width: 24ch;
  margin: 0 0 12px;
}

.page-about .ab-sec .section-note {
  max-width: 60ch;
  margin: 0;
}

.page-about .ab-band {
  padding: var(--ab-pad);
  border: 1px solid var(--line-ghost);
  border-radius: 6px;
}

.page-about .ab-band--indigo {
  background: linear-gradient(165deg, rgba(43, 27, 90, 0.62), rgba(11, 18, 32, 0.35));
}

.page-about .ab-band--night {
  background: linear-gradient(165deg, rgba(14, 42, 51, 0.78), rgba(11, 18, 32, 0.4));
}

/* ---------- 三条服务线 ---------- */
.page-about .ab-cards {
  display: grid;
  gap: 14px;
}

.page-about .ab-card {
  position: relative;
  padding: 24px 20px 22px;
  background: var(--panel);
  border: 1px solid var(--line-ghost);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.24s ease, transform 0.24s ease;
}

.page-about .ab-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--violet), var(--magenta));
  opacity: 0.75;
}

.page-about .ab-card:hover {
  border-color: var(--line);
  transform: translateY(-2px);
}

.page-about .ab-card .card-num {
  display: block;
  margin-bottom: 12px;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--lemon);
}

.page-about .ab-card .card-title {
  margin: 0 0 10px;
  font-size: 19px;
  color: var(--mist);
}

.page-about .ab-card p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--slate);
}

.page-about .ab-card-meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
  letter-spacing: 0.06em;
}

.page-about .ab-link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin-top: 26px;
}

.page-about .ab-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(36, 224, 255, 0.35);
  padding-bottom: 3px;
  transition: color 0.2s ease, border-color 0.2s ease, gap 0.2s ease;
}

.page-about .ab-link i {
  font-style: normal;
}

.page-about .ab-link:hover {
  color: var(--lemon);
  border-color: rgba(255, 225, 77, 0.5);
  gap: 12px;
}

.page-about .ab-link--wide {
  margin-top: 26px;
}

/* ---------- 图片容器 ---------- */
.page-about .ab-figure {
  margin: 0 0 30px;
}

.page-about .ab-figure .media-frame img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .ab-cap {
  display: block;
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--slate);
}

/* ---------- 时间轴 ---------- */
.page-about .tl {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), rgba(36, 224, 255, 0.06));
}

.page-about .tl-item {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--line-ghost);
  transition: background-color 0.24s ease;
}

.page-about .tl-item:last-child {
  border-bottom: none;
}

.page-about .tl-item:hover {
  background: rgba(36, 224, 255, 0.04);
}

.page-about .tl-mark {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding-top: 4px;
}

.page-about .tl-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--lemon);
  box-shadow: 0 0 0 4px rgba(255, 225, 77, 0.14);
}

.page-about .tl-item:hover .tl-dot {
  box-shadow: 0 0 0 6px rgba(255, 225, 77, 0.2), 0 0 14px rgba(255, 225, 77, 0.5);
}

.page-about .tl-num {
  font-size: 11px;
  color: var(--slate);
  letter-spacing: 0.08em;
}

.page-about .tl-title {
  margin: 0 0 6px;
  font-size: 16px;
  line-height: 1.5;
  color: var(--mist);
}

.page-about .tl-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 协作网络 ---------- */
.page-about .ab-net {
  display: grid;
  gap: 26px;
}

.page-about .ab-net-visual {
  padding: 14px;
  border: 1px solid var(--line-ghost);
  border-radius: var(--radius);
  background: radial-gradient(circle at 60% 40%, rgba(36, 224, 255, 0.1), transparent 68%), rgba(11, 18, 32, 0.6);
}

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

.page-about .ab-net-svg line {
  stroke: rgba(36, 224, 255, 0.26);
  stroke-width: 0.8;
}

.page-about .net-node {
  fill: var(--cyan);
  opacity: 0.85;
  transition: opacity 0.2s ease, r 0.2s ease;
}

.page-about .net-node--hub {
  fill: var(--lemon);
  opacity: 1;
}

.page-about .ab-net-svg:hover .net-node {
  opacity: 1;
}

.page-about .ab-net-list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-net-list li {
  display: grid;
  gap: 8px;
  padding: 16px 16px 18px;
  border: 1px solid var(--line-ghost);
  border-left: 2px solid rgba(36, 224, 255, 0.5);
  border-radius: var(--radius);
  background: rgba(11, 18, 32, 0.5);
}

.page-about .ab-net-list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 下载与适配 ---------- */
.page-about .ab-adapt {
  display: grid;
  gap: 28px;
}

.page-about .ab-cats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
}

.page-about .ab-cats li {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 11px 12px;
  font-size: 14px;
  color: var(--mist);
  border: 1px solid var(--line-ghost);
  border-radius: var(--radius);
  background: rgba(11, 18, 32, 0.5);
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.page-about .ab-cats li:hover {
  border-color: var(--line);
  background: rgba(36, 224, 255, 0.06);
}

.page-about .ab-cat-idx {
  font-size: 11px;
  color: var(--cyan);
  letter-spacing: 0.06em;
}

.page-about .ab-filter-note {
  padding: 18px 16px;
  border: 1px solid rgba(255, 107, 26, 0.28);
  border-radius: var(--radius);
  background: linear-gradient(140deg, rgba(255, 107, 26, 0.1), rgba(11, 18, 32, 0.5));
}

.page-about .ab-filter-title {
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 700;
  color: var(--lemon);
  letter-spacing: 0.01em;
}

.page-about .ab-filter-note p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--slate);
}

.page-about .ab-figure--square {
  margin-bottom: 0;
}

.page-about .ab-update-row {
  display: grid;
  gap: 16px;
}

.page-about .ab-update-item {
  padding: 16px 0 0;
  border-top: 1px solid var(--line-ghost);
}

.page-about .ab-update-num {
  display: inline-block;
  margin-bottom: 8px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mint);
}

.page-about .ab-update-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 团队 ---------- */
.page-about .ab-team {
  display: grid;
  gap: 14px;
}

.page-about .ab-team-card {
  padding: 22px 20px;
  border: 1px solid var(--line-ghost);
  border-radius: var(--radius);
  background: var(--panel);
  transition: border-color 0.24s ease, transform 0.24s ease;
}

.page-about .ab-team-card:hover {
  border-color: var(--line);
  transform: translateY(-2px);
}

.page-about .ab-team-idx {
  display: inline-block;
  margin-bottom: 12px;
  padding: 4px 10px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ink);
  background: var(--cyan);
  border-radius: 2px;
}

.page-about .ab-team-card:nth-child(2) .ab-team-idx {
  background: var(--lemon);
}

.page-about .ab-team-card:nth-child(3) .ab-team-idx {
  background: var(--mint);
}

.page-about .ab-team-card h3 {
  margin: 0 0 10px;
  font-size: 17px;
  color: var(--mist);
}

.page-about .ab-team-card p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--slate);
}

.page-about .ab-team-meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--slate);
  letter-spacing: 0.04em;
}

.page-about .ab-team-foot {
  display: grid;
  gap: 14px;
  margin-top: 26px;
  padding: 20px;
  border-left: 2px solid var(--cyan);
  background: rgba(36, 224, 255, 0.05);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.page-about .ab-team-foot p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .ab-team-foot .ab-link {
  justify-self: start;
}

/* ---------- 合作生态 ---------- */
.page-about .ab-eco {
  display: grid;
  gap: 28px;
}

.page-about .ab-eco-sub {
  margin: 0 0 12px;
  font-size: 15px;
  letter-spacing: 0.08em;
  color: var(--lemon);
}

.page-about .ab-eco-left p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--slate);
}

.page-about .ab-eco-btn {
  margin-top: 4px;
}

.page-about .ab-eco-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-eco-list li {
  display: grid;
  gap: 8px;
  padding: 14px 16px;
  border: 1px solid var(--line-ghost);
  border-radius: var(--radius);
  background: rgba(11, 18, 32, 0.42);
}

.page-about .ab-eco-list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 行动区 ---------- */
.page-about .ab-cta {
  display: grid;
  gap: 22px;
  padding: 30px 20px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: linear-gradient(135deg, rgba(122, 43, 255, 0.2), rgba(36, 224, 255, 0.08) 70%, transparent);
}

.page-about .ab-cta h2 {
  margin: 0 0 10px;
  font-size: 24px;
  line-height: 1.3;
  color: var(--mist);
}

.page-about .ab-cta p {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--slate);
}

.page-about .ab-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about {
    --ab-pad: 40px 32px;
  }

  .page-about .ab-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .ab-stats .stat-value {
    font-size: 34px;
  }

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

  .page-about .ab-update-row {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }

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

  .page-about .ab-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    padding: 40px 36px;
  }
}

@media (min-width: 900px) {
  .page-about {
    --ab-gap: 96px;
  }

  .page-about .ab-intro {
    padding-top: 34px;
  }

  .page-about .ab-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .tl-item {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 20px;
    padding: 16px 12px 16px 0;
  }

  .page-about .tl::before {
    left: 16px;
  }

  .page-about .ab-net {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
    gap: 40px;
  }

  .page-about .ab-adapt {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .ab-adapt .ab-update-row {
    grid-column: 1 / -1;
  }

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

  .page-about .ab-eco {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 44px;
  }

  .page-about .ab-sec .section-title {
    font-size: 30px;
  }
}

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

  .page-about .ab-card:hover,
  .page-about .ab-team-card:hover {
    transform: none;
  }
}