.page-about {
  --ab-line: rgba(168, 182, 198, .2);
  --ab-line-strong: rgba(168, 182, 198, .34);
  --ab-glow: rgba(255, 106, 43, .14);
}

.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

/* ---------- 首屏 ---------- */

.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding-block: 36px 60px;
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(880px 420px at 90% -12%, rgba(47, 210, 197, .12), transparent 62%),
    radial-gradient(680px 380px at 4% 112%, rgba(255, 106, 43, .13), transparent 60%);
  pointer-events: none;
}

.page-about .ab-hero-inner {
  position: relative;
  display: grid;
  gap: 34px;
}

.page-about .ab-hero-copy h1 {
  margin: 14px 0 18px;
  font-size: clamp(30px, 6vw, 54px);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -.02em;
  color: var(--c-white);
}

.page-about .ab-hero-copy .lead {
  max-width: 36em;
}

.page-about .ab-hero-copy .prose {
  margin-top: 14px;
}

.page-about .ab-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .ab-hero-panel {
  align-self: start;
}

.page-about .ab-hero-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .ab-stat-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 16px;
  border: 1px solid var(--ab-line);
  border-radius: var(--r-lg);
  background: linear-gradient(158deg, rgba(18, 38, 63, .94), rgba(10, 22, 38, .88));
}

.page-about .ab-stat-card .v {
  font-family: var(--font-num);
  font-size: clamp(26px, 5vw, 34px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--c-signal);
}

.page-about .ab-stat-card .k {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.5;
}

/* ---------- 时间轴 ---------- */

.page-about .ab-story-figure {
  margin: 32px 0 40px;
}

.page-about .ab-timeline {
  position: relative;
  padding-left: 34px;
}

.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--c-signal) 0%, rgba(255, 106, 43, .34) 38%, rgba(168, 182, 198, .16) 100%);
}

.page-about .ab-node {
  position: relative;
  margin-bottom: 24px;
}

.page-about .ab-node::before {
  content: "";
  position: absolute;
  left: -33px;
  top: 26px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--c-ink);
  border: 2px solid var(--c-signal);
  box-shadow: 0 0 0 5px var(--ab-glow);
  z-index: 1;
}

.page-about .ab-node-card {
  padding: 22px 20px;
  border: 1px solid var(--ab-line);
  border-radius: var(--r-lg);
  background: linear-gradient(150deg, rgba(18, 38, 63, .92), rgba(10, 22, 38, .86));
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .ab-node-card:hover {
  border-color: rgba(255, 106, 43, .45);
  transform: translateY(-3px);
}

.page-about .ab-node-year {
  margin: 0 0 10px;
  font-family: var(--font-num);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--c-signal);
  line-height: 1;
}

.page-about .ab-node-card h3 {
  margin: 0 0 10px;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--c-white);
}

.page-about .ab-node-card > p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-dim);
  max-width: 38em;
}

.page-about .ab-node-note {
  margin-top: 14px !important;
  padding-top: 14px;
  border-top: 1px dashed var(--ab-line);
  font-size: 14px !important;
  color: var(--c-silver) !important;
}

.page-about .ab-diff {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}

.page-about .ab-diff-cell {
  padding: 13px 15px;
  border: 1px dashed var(--ab-line-strong);
  border-radius: var(--r-md);
  background: rgba(5, 13, 24, .52);
}

.page-about .ab-diff-cell b {
  display: block;
  margin-bottom: 6px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--c-cyan);
}

.page-about .ab-diff-cell p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-dim);
}

/* ---------- 网点 ---------- */

.page-about .ab-cover-grid {
  display: grid;
  gap: 30px;
  margin-top: 34px;
}

.page-about .ab-table-caption {
  padding-bottom: 10px;
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--c-silver);
  text-align: left;
}

.page-about .ab-visual-label {
  margin: 0 0 14px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--c-silver);
  text-transform: uppercase;
}

.page-about .ab-density {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .ab-density-cell {
  position: relative;
  aspect-ratio: 5 / 4;
  border-radius: var(--r-md);
  border: 1px solid var(--ab-line);
  background-color: var(--c-navy);
  background-image: radial-gradient(circle, rgba(255, 106, 43, .55) 1.5px, transparent 1.6px);
  background-size: 11px 11px;
  background-position: 6px 6px;
  overflow: hidden;
}

.page-about .ab-density-cell.is-signal {
  border-color: rgba(255, 106, 43, .56);
  background-image: radial-gradient(circle, rgba(255, 106, 43, .95) 1.8px, transparent 1.9px);
}

.page-about .ab-density-cell span {
  position: absolute;
  left: 10px;
  bottom: 10px;
  padding: 4px 10px;
  border-radius: var(--r-pill);
  background: rgba(5, 13, 24, .78);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--c-white);
  white-space: nowrap;
}

.page-about .ab-density-cell.is-signal span {
  color: var(--c-amber);
}

.page-about .ab-cover-note {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-dim);
}

/* ---------- 产能 ---------- */

.page-about .ab-cap-grid {
  display: grid;
  gap: 26px;
  margin-top: 34px;
}

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

.page-about .ab-cap-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding: 16px 18px;
  border: 1px solid var(--ab-line);
  border-left: 3px solid var(--c-signal);
  border-radius: var(--r-md);
  background: rgba(18, 38, 63, .66);
}

.page-about .ab-cap-item .n {
  font-family: var(--font-num);
  font-size: clamp(26px, 4.4vw, 32px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--c-signal);
}

.page-about .ab-cap-item .u {
  font-family: var(--font-num);
  font-size: 13px;
  color: var(--c-amber);
  white-space: nowrap;
}

.page-about .ab-cap-item .t {
  flex: 1 1 100%;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-about .ab-cap-note {
  margin: 18px 0 0;
  padding-left: 16px;
  border-left: 2px solid rgba(47, 210, 197, .45);
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-silver);
}

/* ---------- 案例 ---------- */

.page-about .ab-case-grid {
  display: grid;
  gap: 26px;
  margin-top: 34px;
}

.page-about .ab-tags {
  display: grid;
  gap: 14px;
}

.page-about .ab-tag-panel {
  padding: 20px 18px;
  border: 1px solid var(--ab-line);
  border-radius: var(--r-lg);
  background: linear-gradient(168deg, rgba(18, 38, 63, .86), rgba(10, 22, 38, .72));
}

.page-about .ab-tag-panel h3 {
  margin: 0 0 12px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--c-white);
}

.page-about .ab-tag-panel p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-about .ab-tag-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ---------- 协作网络 ---------- */

.page-about .ab-region-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 34px;
}

.page-about .ab-region {
  padding: 18px 16px;
  border: 1px solid var(--ab-line);
  border-radius: var(--r-md);
  background: rgba(18, 38, 63, .58);
}

.page-about .ab-region-code {
  margin: 0 0 10px;
  font-family: var(--font-num);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--c-cyan);
}

.page-about .ab-region h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--c-white);
}

.page-about .ab-region p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--text-dim);
}

/* ---------- 收束 ---------- */

.page-about .ab-final {
  display: grid;
  gap: 12px;
  margin-top: 44px;
}

.page-about .ab-final-pill {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding: 22px 26px;
  border: 1px solid rgba(255, 106, 43, .32);
  border-radius: var(--r-pill);
  background: linear-gradient(118deg, rgba(255, 106, 43, .12), rgba(47, 210, 197, .07));
}

.page-about .ab-final-pill .v {
  font-family: var(--font-num);
  font-size: clamp(28px, 5vw, 38px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--c-signal);
}

.page-about .ab-final-pill .t {
  font-size: 14px;
  color: var(--c-silver);
}

.page-about .ab-cta {
  margin-top: 34px;
  padding: 26px 22px;
  border: 1px solid var(--ab-line);
  border-radius: var(--r-xl);
  background: linear-gradient(160deg, rgba(18, 38, 63, .9), rgba(5, 13, 24, .82));
}

.page-about .ab-cta-text {
  margin: 0 0 18px;
  font-size: 17px;
  font-weight: 700;
  color: var(--c-white);
}

.page-about .ab-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 断点 ---------- */

@media (min-width: 560px) {
  .page-about .ab-density {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 760px) {
  .page-about .ab-final {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

@media (min-width: 860px) {
  .page-about .ab-timeline {
    padding-left: 0;
  }

  .page-about .ab-timeline::before {
    left: 118px;
  }

  .page-about .ab-node {
    padding-left: 158px;
    margin-bottom: 32px;
  }

  .page-about .ab-node::before {
    left: 110px;
    top: 29px;
  }

  .page-about .ab-node:nth-child(even) {
    padding-left: 196px;
  }

  .page-about .ab-node:nth-child(even) .ab-node-card {
    background: linear-gradient(150deg, rgba(18, 38, 63, .96), rgba(5, 13, 24, .9));
  }
}

@media (min-width: 900px) {
  .page-about .ab-cap-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    align-items: center;
    gap: 34px;
  }

  .page-about .ab-case-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: start;
    gap: 30px;
  }
}

@media (min-width: 960px) {
  .page-about .ab-hero {
    padding-block: 48px 76px;
  }

  .page-about .ab-hero-inner {
    grid-template-columns: minmax(0, 1.22fr) minmax(0, .88fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .ab-cover-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 36px;
    align-items: start;
  }

  .page-about .ab-cta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 26px;
    padding: 28px 30px;
  }

  .page-about .ab-cta-text {
    margin: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-node-card,
  .page-about .ab-node-card:hover {
    transform: none;
  }
}
<<<END>>>