.page-about {
  --ab-line: rgba(147, 164, 189, 0.18);
  --ab-line-soft: rgba(147, 164, 189, 0.09);
  --ab-radius: 16px;
  --ab-pad: clamp(2.5rem, 6vw, 5rem);
  --ab-gap: clamp(1.5rem, 4vw, 3rem);
  background: var(--ink-900);
  color: var(--paper);
  padding-bottom: clamp(2rem, 6vw, 4rem);
}

.page-about .data {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.5rem, 5vw, 3rem) 0 clamp(2rem, 5vw, 3.5rem);
  background:
    radial-gradient(120% 90% at 8% 0%, rgba(56, 242, 224, 0.14), transparent 60%),
    radial-gradient(90% 80% at 96% 6%, rgba(255, 122, 26, 0.12), transparent 58%),
    linear-gradient(180deg, var(--ink-800) 0%, var(--ink-900) 100%);
  border-bottom: 1px solid var(--ab-line-soft);
}

.page-about .ab-hero__crumb {
  margin-bottom: clamp(1.25rem, 4vw, 2.25rem);
}

.page-about .ab-hero__grid {
  display: grid;
  gap: var(--ab-gap);
}

.page-about .ab-hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.85rem, 6.2vw, 3.5rem);
  line-height: 1.12;
  letter-spacing: -0.01em;
  margin: 0.6rem 0 0;
  max-width: 22ch;
  background: linear-gradient(120deg, var(--paper) 30%, var(--cyan) 92%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .ab-hero__text {
  margin: 1.1rem 0 0;
  max-width: 52ch;
  color: var(--paper-soft);
  line-height: 1.85;
  font-size: clamp(0.95rem, 2.4vw, 1.05rem);
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.6rem;
}

.page-about .ab-hero__panel {
  border: 1px solid var(--ab-line);
  border-radius: var(--ab-radius);
  background: linear-gradient(165deg, rgba(27, 42, 63, 0.6), rgba(14, 23, 40, 0.45));
  box-shadow: var(--shadow-card);
  padding: 1.1rem 1rem;
}

.page-about .ab-hero__panel-title {
  margin: 0 0 0.85rem;
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .ab-index {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.2rem;
}

.page-about .ab-index__link {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  padding: 0.5rem 0.55rem;
  border-radius: 9px;
  border-left: 2px solid transparent;
  color: var(--paper-soft);
  text-decoration: none;
  font-size: 0.9rem;
  transition: background-color 0.16s ease, border-color 0.16s ease, color 0.16s ease;
}

.page-about .ab-index__num {
  color: var(--muted);
  font-size: 0.78rem;
}

.page-about .ab-index__link:hover,
.page-about .ab-index__link:focus-visible {
  background: rgba(56, 242, 224, 0.08);
  border-left-color: var(--cyan);
  color: var(--paper);
}

.page-about .ab-index__link[aria-current="true"] {
  border-left-color: var(--cyan);
  background: rgba(56, 242, 224, 0.1);
  color: var(--paper);
}

.page-about .ab-index__link[aria-current="true"] .ab-index__num {
  color: var(--cyan);
}

.page-about .ab-index__link:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

/* ---------- 章节骨架 ---------- */
.page-about .ab-chapter {
  padding: var(--ab-pad) 0;
  border-bottom: 1px solid var(--ab-line-soft);
}

.page-about .ab-chapter--deep {
  background:
    radial-gradient(100% 70% at 100% 0%, rgba(18, 58, 74, 0.55), transparent 62%),
    var(--ink-800);
}

.page-about .ab-chapter__inner {
  display: grid;
  gap: clamp(1.4rem, 4vw, 2.4rem);
}

.page-about .ab-chapter__head {
  display: grid;
  gap: 0.55rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--ab-line);
}

.page-about .ab-chapter__num {
  color: var(--cyan);
  font-size: 0.85rem;
  letter-spacing: 0.2em;
}

.page-about .ab-chapter__title {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 4vw, 2.15rem);
  font-weight: 800;
  line-height: 1.22;
  margin: 0;
  color: var(--paper);
}

.page-about .ab-chapter__note {
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.75;
  border-left: 2px solid var(--orange);
  padding-left: 0.7rem;
}

/* ---------- 通用双栏与图文 ---------- */
.page-about .ab-split {
  display: grid;
  gap: var(--ab-gap);
}

.page-about .ab-split__text p {
  margin: 0 0 1rem;
  color: var(--paper-soft);
  line-height: 1.85;
  max-width: 52ch;
}

.page-about .ab-split__text p:last-child {
  margin-bottom: 0;
}

.page-about .ab-figure {
  margin: 0;
  border: 1px solid var(--ab-line);
  border-radius: var(--ab-radius);
  overflow: hidden;
  background: var(--slate);
  box-shadow: var(--shadow-card);
}

.page-about .ab-figure__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-about .ab-figure figcaption {
  padding: 0.8rem 1rem;
  font-size: 0.79rem;
  line-height: 1.7;
  color: var(--muted);
  border-top: 1px solid var(--ab-line-soft);
}

.page-about .ab-facts {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(8rem, 1fr));
  gap: 0.8rem;
  margin: 1.5rem 0 0;
  padding: 0;
}

.page-about .ab-facts__item {
  display: grid;
  gap: 0.3rem;
  padding: 0.9rem 0.9rem 0.85rem;
  border: 1px solid var(--ab-line);
  border-top: 2px solid var(--cyan);
  border-radius: 11px;
  background: rgba(27, 42, 63, 0.42);
}

.page-about .ab-facts__value {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--paper);
  line-height: 1;
}

.page-about .ab-facts__label {
  font-size: 0.76rem;
  color: var(--muted);
  line-height: 1.55;
}

/* ---------- 时间轴 ---------- */
.page-about .ab-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
  position: relative;
}

.page-about .ab-stage {
  position: relative;
  padding: 1.15rem 1.05rem 1.2rem;
  border: 1px solid var(--ab-line);
  border-radius: var(--ab-radius);
  background: linear-gradient(160deg, rgba(27, 42, 63, 0.72), rgba(7, 11, 18, 0.55));
  transition: transform 0.16s ease, border-color 0.16s ease, box-shadow 0.16s ease;
}

.page-about .ab-stage::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 1.05rem;
  width: 42px;
  height: 2px;
  background: var(--cyan);
}

.page-about .ab-stage:hover,
.page-about .ab-stage:focus-visible {
  transform: translateY(-3px);
  border-color: rgba(56, 242, 224, 0.42);
  box-shadow: 0 18px 40px -34px rgba(56, 242, 224, 0.8);
}

.page-about .ab-stage:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

.page-about .ab-stage__ver {
  display: inline-block;
  color: var(--orange);
  font-size: 0.82rem;
  letter-spacing: 0.16em;
}

.page-about .ab-stage__title {
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 700;
  margin: 0.35rem 0 0.5rem;
  color: var(--paper);
  line-height: 1.35;
}

.page-about .ab-stage__text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--paper-soft);
}

.page-about .ab-stage__note {
  margin: 0.7rem 0 0;
  padding-top: 0.6rem;
  border-top: 1px dashed var(--ab-line);
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.65;
}

/* ---------- 流程步骤 ---------- */
.page-about .ab-steps {
  list-style: none;
  margin: 0 0 1.2rem;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

.page-about .ab-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.85rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px solid var(--ab-line-soft);
}

.page-about .ab-step:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .ab-step__idx {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  border: 1px solid rgba(56, 242, 224, 0.5);
  color: var(--cyan);
  font-size: 0.85rem;
  flex: none;
}

.page-about .ab-step__title {
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 700;
  margin: 0 0 0.3rem;
  color: var(--paper);
}

.page-about .ab-step p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--paper-soft);
}

.page-about .ab-note-line {
  margin: 0;
  padding: 0.85rem 1rem;
  border-left: 2px solid var(--orange);
  background: rgba(255, 122, 26, 0.07);
  border-radius: 0 10px 10px 0;
  font-size: 0.84rem;
  line-height: 1.75;
  color: var(--paper-soft);
}

/* ---------- 团队比例条 ---------- */
.page-about .ab-team {
  border: 1px solid var(--ab-line);
  border-radius: var(--ab-radius);
  padding: 1.2rem 1.05rem 1.3rem;
  background: rgba(27, 42, 63, 0.4);
}

.page-about .ab-team__total {
  margin: 0 0 0.9rem;
  font-size: 0.88rem;
  color: var(--muted);
}

.page-about .ab-team__total-num {
  font-size: 1.9rem;
  font-weight: 700;
  color: var(--paper);
  margin-right: 0.35rem;
  vertical-align: -0.12em;
}

.page-about .ab-team__bar {
  display: flex;
  gap: 3px;
  height: 3rem;
  border-radius: 10px;
  overflow: hidden;
  background: rgba(7, 11, 18, 0.6);
}

.page-about .ab-team__seg {
  flex: var(--w) 1 0%;
  display: flex;
  align-items: center;
  padding: 0 0.4rem;
  min-width: 0;
  transition: filter 0.16s ease;
}

.page-about .ab-team__seg:hover {
  filter: brightness(1.35);
}

.page-about .ab-team__seg--data {
  background: linear-gradient(135deg, var(--cyan), #1fae9f);
  color: #04140f;
}

.page-about .ab-team__seg--video {
  background: linear-gradient(135deg, var(--orange), #c8530f);
  color: #1a0a02;
}

.page-about .ab-team__seg--search {
  background: linear-gradient(135deg, #7cb8ff, #3f74b8);
  color: #04101f;
}

.page-about .ab-team__seg--service {
  background: linear-gradient(135deg, var(--rose), #b32a59);
  color: #1a0410;
}

.page-about .ab-team__seg-label {
  font-family: var(--font-data);
  font-size: 0.68rem;
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.page-about .ab-team__legend {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.page-about .ab-team__legend-item {
  display: flex;
  align-items: flex-start;
  gap: 0.55rem;
  font-size: 0.83rem;
  line-height: 1.7;
  color: var(--paper-soft);
}

.page-about .ab-team__dot {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  margin-top: 0.42rem;
  flex: none;
}

.page-about .ab-team__dot--data { background: var(--cyan); }
.page-about .ab-team__dot--video { background: var(--orange); }
.page-about .ab-team__dot--search { background: #7cb8ff; }
.page-about .ab-team__dot--service { background: var(--rose); }

/* ---------- 协作网络 ---------- */
.page-about .ab-network {
  display: grid;
  gap: 1.2rem;
  border: 1px solid var(--ab-line);
  border-radius: var(--ab-radius);
  overflow: hidden;
  background: linear-gradient(150deg, rgba(18, 58, 74, 0.5), rgba(7, 11, 18, 0.6));
}

.page-about .ab-network__media {
  overflow: hidden;
}

.page-about .ab-network__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-about .ab-network__body {
  padding: 0.4rem 1.05rem 1.3rem;
}

.page-about .ab-network__title {
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 3vw, 1.35rem);
  font-weight: 700;
  line-height: 1.4;
  margin: 0 0 0.6rem;
  color: var(--paper);
}

.page-about .ab-network__body p {
  margin: 0 0 1rem;
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--paper-soft);
}

.page-about .ab-inline-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.87rem;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 242, 224, 0.45);
  padding-bottom: 2px;
}

.page-about .ab-inline-link::after {
  content: "→";
}

.page-about .ab-inline-link:hover,
.page-about .ab-inline-link:focus-visible {
  border-bottom-color: var(--orange);
  color: var(--orange);
}

.page-about .ab-inline-link:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

/* ---------- 服务标准 ---------- */
.page-about .ab-service {
  display: grid;
  gap: 0.9rem;
}

.page-about .ab-service__card {
  padding: 1.1rem 1.05rem 1.15rem;
  border: 1px solid var(--ab-line);
  border-radius: 13px;
  background: linear-gradient(170deg, rgba(27, 42, 63, 0.55), rgba(14, 23, 40, 0.4));
}

.page-about .ab-service__value {
  margin: 0;
  font-family: var(--font-data);
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.01em;
}

.page-about .ab-service__card:nth-child(2) .ab-service__value {
  color: var(--orange);
}

.page-about .ab-service__card:nth-child(3) .ab-service__value {
  color: var(--paper);
}

.page-about .ab-service__title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  margin: 0.6rem 0 0.45rem;
  color: var(--paper);
}

.page-about .ab-service__card p:last-child {
  margin: 0;
  font-size: 0.87rem;
  line-height: 1.8;
  color: var(--paper-soft);
}

.page-about .ab-response {
  display: grid;
  gap: 1rem;
  align-items: start;
  padding: 1.15rem 1.05rem;
  border: 1px solid var(--ab-line);
  border-radius: var(--ab-radius);
  background: rgba(7, 11, 18, 0.45);
}

.page-about .ab-response__text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--paper-soft);
}

/* ---------- 入口矩阵 ---------- */
.page-about .ab-matrix {
  display: grid;
  gap: 0.9rem;
}

.page-about .ab-matrix__card {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: 1.15rem 1.05rem 1.1rem;
  border: 1px solid var(--ab-line);
  border-radius: var(--ab-radius);
  background: linear-gradient(165deg, rgba(27, 42, 63, 0.6), rgba(7, 11, 18, 0.5));
  transition: transform 0.16s ease, border-color 0.16s ease;
}

.page-about .ab-matrix__card:hover,
.page-about .ab-matrix__card:focus-within {
  transform: translateY(-3px);
  border-color: rgba(124, 184, 255, 0.45);
}

.page-about .ab-matrix__title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0;
  color: var(--paper);
  line-height: 1.35;
}

.page-about .ab-matrix__card p {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--paper-soft);
  flex: 1;
}

.page-about .ab-matrix__link {
  align-self: flex-start;
  margin-top: 0.3rem;
  font-size: 0.85rem;
  color: var(--focus);
  text-decoration: none;
  border-bottom: 1px solid rgba(124, 184, 255, 0.4);
  padding-bottom: 2px;
}

.page-about .ab-matrix__link:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .ab-matrix__link:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

.page-about .ab-closing {
  display: grid;
  gap: 1rem;
  padding: 1.2rem 1.05rem;
  border-radius: var(--ab-radius);
  border: 1px solid var(--ab-line);
  background: linear-gradient(130deg, rgba(18, 58, 74, 0.55), rgba(7, 11, 18, 0.5));
}

.page-about .ab-closing__text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--paper-soft);
}

.page-about .ab-closing__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .ab-service {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .ab-team__legend {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.5rem 1.2rem;
  }
}

@media (min-width: 880px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-about .ab-chapter__head {
    grid-template-columns: auto minmax(0, 1fr) minmax(0, 20rem);
    align-items: end;
    column-gap: 1.4rem;
  }

  .page-about .ab-split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

  .page-about .ab-split--reverse {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  }

  .page-about .ab-timeline {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.1rem;
  }

  .page-about .ab-timeline::before {
    content: "";
    position: absolute;
    top: 2.35rem;
    left: 1rem;
    right: 1rem;
    height: 1px;
    background: linear-gradient(90deg, var(--cyan), var(--orange));
    opacity: 0.4;
  }

  .page-about .ab-network {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: stretch;
  }

  .page-about .ab-network__media {
    height: 100%;
  }

  .page-about .ab-network__img {
    height: 100%;
    object-fit: cover;
  }

  .page-about .ab-network__body {
    padding: 1.4rem 1.3rem;
    align-self: center;
  }

  .page-about .ab-response {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 1.3rem 1.4rem;
  }

  .page-about .ab-closing {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 1.4rem 1.5rem;
  }
}

@media (min-width: 1024px) {
  .page-about .ab-service {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-stage,
  .page-about .ab-matrix__card,
  .page-about .ab-index__link,
  .page-about .ab-team__seg {
    transition: none;
  }

  .page-about .ab-stage:hover,
  .page-about .ab-stage:focus-visible,
  .page-about .ab-matrix__card:hover,
  .page-about .ab-matrix__card:focus-within {
    transform: none;
  }
}
<<<END>>>

.page-about {
  --w: inherit;
}