.page-about {
  --ab-gap: 16px;
  position: relative;
  background-color: var(--bg);
  background-image:
    linear-gradient(to right, var(--grid-b) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-b) 1px, transparent 1px);
  background-size: 24px 24px;
  color: var(--text);
  overflow-x: hidden;
  padding-bottom: 8px;
}

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

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding: 22px 0 40px;
  border-bottom: 2px solid var(--line);
  background:
    radial-gradient(760px 400px at 8% -22%, rgba(0, 229, 255, .18), transparent 62%),
    radial-gradient(560px 320px at 96% 4%, rgba(255, 122, 26, .12), transparent 66%),
    linear-gradient(180deg, #071026 0%, rgba(5, 10, 24, 0) 100%);
}

.page-about .ab-hero__stamp {
  position: absolute;
  right: -8px;
  bottom: -34px;
  font-size: clamp(88px, 24vw, 260px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.04em;
  color: rgba(0, 229, 255, .07);
  pointer-events: none;
  user-select: none;
  z-index: 0;
}

.page-about .ab-hero__crumb {
  margin-bottom: 22px;
}

.page-about .ab-hero__grid {
  display: grid;
  gap: 24px;
}

.page-about .ab-kicker {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .ab-hero__title {
  margin: 0 0 16px;
  font-size: clamp(28px, 7.2vw, 50px);
  font-weight: 900;
  line-height: 1.22;
  letter-spacing: -.02em;
  color: var(--text);
}

.page-about .ab-hl {
  position: relative;
  color: var(--cyan);
  white-space: nowrap;
}

.page-about .ab-hl::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 2px;
  height: 6px;
  background: linear-gradient(90deg, rgba(0, 229, 255, .45), rgba(182, 255, 60, .18));
  z-index: -1;
}

.page-about .ab-hero__lead {
  margin: 0;
  max-width: 60ch;
  font-size: clamp(15px, 2.7vw, 17px);
  line-height: 1.85;
  color: var(--muted);
}

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

/* ---------- 首屏数据侧栏 ---------- */
.page-about .ab-side {
  position: relative;
  border: 2px solid var(--line);
  background: linear-gradient(158deg, var(--panel-2) 0%, var(--panel) 100%);
  box-shadow: var(--shadow-hard);
  padding: 16px 16px 8px;
}

.page-about .ab-side__cap {
  margin: 0 0 12px;
  font-size: 10px;
  letter-spacing: .2em;
  color: var(--dim);
}

.page-about .ab-side__list {
  margin: 0;
}

.page-about .ab-side__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--line-soft);
}

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

.page-about .ab-side__row dt {
  font-size: 13px;
  color: var(--muted);
}

.page-about .ab-side__row dd {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--cyan-soft);
}

/* ---------- 通用分区 ---------- */
.page-about .ab-sec {
  padding: 46px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .ab-sec:last-of-type {
  border-bottom: 0;
}

.page-about .ab-lead {
  margin: 0 0 22px;
  max-width: 64ch;
  font-size: clamp(15px, 2.6vw, 16px);
  line-height: 1.85;
  color: var(--text);
}

.page-about .ab-lead--wide {
  max-width: 74ch;
}

/* ---------- 服务四件事 ---------- */
.page-about .ab-svc {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .ab-svc__item {
  position: relative;
  border: 2px solid var(--line);
  background: linear-gradient(150deg, rgba(18, 32, 60, .85), rgba(11, 20, 40, .9));
  padding: 20px 18px 18px;
  box-shadow: 4px 4px 0 0 rgba(30, 58, 95, .6);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .ab-svc__item:nth-child(even) {
  box-shadow: -4px 4px 0 0 rgba(30, 58, 95, .6);
}

.page-about .ab-svc__item:hover {
  transform: translate(-2px, -2px);
  border-color: var(--cyan);
  box-shadow: 6px 6px 0 0 var(--shadow-cyan);
}

.page-about .ab-svc__no {
  display: inline-block;
  margin-bottom: 12px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--orange);
  border: 1px solid rgba(255, 122, 26, .5);
  padding: 2px 7px;
}

.page-about .ab-svc__title {
  margin: 0 0 10px;
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -.01em;
}

.page-about .ab-svc__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 图片容器 ---------- */
.page-about .ab-shot {
  margin: 0;
  border: 2px solid var(--line);
  background: linear-gradient(160deg, var(--panel-2), var(--panel));
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

.page-about .ab-shot--wide {
  margin-bottom: 26px;
}

.page-about .ab-shot--square {
  margin-top: 22px;
}

.page-about .ab-shot--wide2 {
  grid-column: 1 / -1;
  margin-top: 4px;
}

.page-about .ab-shot img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  background-image:
    linear-gradient(to right, var(--grid-a) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-a) 1px, transparent 1px);
  background-size: 24px 24px;
}

.page-about .ab-shot__cap {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
}

/* ---------- 时间轴 ---------- */
.page-about .ab-tl {
  list-style: none;
  margin: 0;
  padding: 0 0 0 22px;
  position: relative;
  display: grid;
  gap: 16px;
}

.page-about .ab-tl::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, rgba(0, 229, 255, .1) 100%);
}

.page-about .ab-tl__item {
  position: relative;
}

.page-about .ab-tl__item::before {
  content: "";
  position: absolute;
  left: -21px;
  top: 24px;
  width: 9px;
  height: 9px;
  border: 2px solid var(--cyan);
  border-radius: 50%;
  background: var(--bg);
}

.page-about .ab-tl__item:last-child::before {
  background: var(--lime);
  border-color: var(--lime);
}

.page-about .ab-tl__card {
  border: 2px solid var(--line);
  background: rgba(11, 20, 40, .82);
  padding: 18px 16px;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .ab-tl__card:hover {
  border-color: var(--cyan);
  background: rgba(18, 32, 60, .9);
}

.page-about .ab-tl__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.page-about .ab-tl__year {
  font-size: 22px;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: -.02em;
}

.page-about .ab-tl__title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 800;
}

.page-about .ab-tl__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 团队 ---------- */
.page-about .ab-team {
  display: grid;
  gap: 26px;
}

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

.page-about .ab-team__notes li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .ab-team__notes li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 2px;
  background: var(--cyan);
}

.page-about .ab-team__notes strong {
  color: var(--text);
  font-weight: 700;
}

.page-about .ab-team__chart {
  border: 2px solid var(--line);
  background: linear-gradient(158deg, rgba(18, 32, 60, .78), rgba(11, 20, 40, .88));
  padding: 16px 14px 18px;
  box-shadow: var(--shadow-hard);
}

.page-about .ab-bars__row {
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr) 34px;
  align-items: center;
  gap: 10px;
  padding: 9px 0;
  border-bottom: 1px dashed var(--line-soft);
}

.page-about .ab-bars__row:last-of-type {
  border-bottom: 0;
}

.page-about .ab-bars__k {
  font-size: 13px;
  color: var(--muted);
}

.page-about .ab-bars__track {
  display: block;
  height: 10px;
  background: rgba(30, 58, 95, .45);
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-about .ab-bars__fill {
  display: block;
  height: 100%;
  transition: width 480ms var(--ease);
}

.page-about .ab-bars__fill--a { width: 31.6%; background: linear-gradient(90deg, var(--cyan), var(--cyan-soft)); }
.page-about .ab-bars__fill--b { width: 23.7%; background: linear-gradient(90deg, #1f8fc4, var(--cyan)); }
.page-about .ab-bars__fill--c { width: 21.1%; background: linear-gradient(90deg, var(--orange), #ffb066); }
.page-about .ab-bars__fill--d { width: 15.8%; background: linear-gradient(90deg, #6d82cc, #a4b5f2); }
.page-about .ab-bars__fill--e { width: 7.9%; background: linear-gradient(90deg, var(--lime), #ddff96); }

.page-about .ab-bars__v {
  text-align: right;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
}

/* ---------- 覆盖 ---------- */
.page-about .ab-cover {
  display: grid;
  gap: 24px;
}

.page-about .ab-cover__note {
  margin: 0;
  max-width: 64ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
  border-left: 3px solid var(--orange);
  padding-left: 14px;
}

.page-about .ab-cities {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(74px, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line);
}

.page-about .ab-cities li {
  background: var(--panel);
  padding: 13px 4px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text);
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .ab-cities li:hover {
  background: rgba(0, 229, 255, .14);
  color: var(--cyan-soft);
}

/* ---------- 栏目列表 ---------- */
.page-about .ab-col-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--line);
}

.page-about .ab-col {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 6px 14px;
  padding: 18px 2px;
  border-bottom: 1px solid var(--line-soft);
  transition: background-color var(--dur) var(--ease);
}

.page-about .ab-col:hover {
  background: rgba(0, 229, 255, .05);
}

.page-about .ab-col__no {
  font-size: 18px;
  font-weight: 700;
  color: var(--cyan);
  line-height: 1.4;
}

.page-about .ab-col__name {
  font-size: 17px;
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: -.01em;
}

.page-about .ab-col__desc {
  grid-column: 1 / -1;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

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

.page-about .ab-partner {
  border: 2px solid var(--line);
  background: rgba(11, 20, 40, .85);
  padding: 18px 16px;
  border-left: 4px solid var(--orange);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .ab-partner:hover {
  border-color: var(--cyan);
  border-left-color: var(--lime);
  box-shadow: 5px 5px 0 0 rgba(0, 229, 255, .18);
}

.page-about .ab-partner__tag {
  display: inline-block;
  margin-bottom: 10px;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--lime);
}

.page-about .ab-partner__title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 800;
}

.page-about .ab-partner p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 尾部行动区 ---------- */
.page-about .ab-cta {
  margin-top: 34px;
  border: 2px solid var(--line);
  background:
    radial-gradient(520px 240px at 6% 0%, rgba(0, 229, 255, .16), transparent 68%),
    linear-gradient(150deg, var(--panel-2), var(--panel));
  box-shadow: var(--shadow-hard);
  padding: 24px 18px;
  display: grid;
  gap: 20px;
}

.page-about .ab-cta__title {
  margin: 0 0 10px;
  font-size: clamp(20px, 4.6vw, 26px);
  font-weight: 900;
  letter-spacing: -.02em;
}

.page-about .ab-cta__text p {
  margin: 0;
  max-width: 58ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}

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

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

  .page-about .ab-cta {
    padding: 30px 26px;
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero {
    padding: 28px 0 52px;
  }

  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(268px, .9fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .ab-side {
    margin-top: 6px;
  }

  .page-about .ab-sec {
    padding: 60px 0;
  }

  .page-about .ab-tl {
    padding-left: 28px;
  }

  .page-about .ab-tl__item::before {
    left: -27px;
  }

  .page-about .ab-tl__card {
    padding: 22px 24px;
  }

  .page-about .ab-tl__year {
    font-size: 26px;
  }

  .page-about .ab-team {
    grid-template-columns: minmax(0, 1fr) minmax(320px, .95fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .ab-cover {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
    gap: 36px;
    align-items: start;
  }

  .page-about .ab-col {
    grid-template-columns: 56px minmax(0, 200px) minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
    padding: 20px 2px;
  }

  .page-about .ab-col__desc {
    grid-column: 3;
  }

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

  .page-about .ab-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 30px;
    padding: 34px 32px;
  }

  .page-about .ab-cta__acts {
    flex-wrap: nowrap;
  }
}

@media (min-width: 1100px) {
  .page-about .ab-svc {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-svc__item,
  .page-about .ab-tl__card,
  .page-about .ab-partner,
  .page-about .ab-cities li,
  .page-about .ab-bars__fill {
    transition: none;
  }
}