.page-about {
  --ab-hair: rgba(199, 208, 218, .22);
  --ab-hair-2: rgba(199, 208, 218, .13);
  --ab-glass: rgba(127, 211, 232, .12);
  --ab-glass-hi: rgba(127, 211, 232, .22);
  --ab-ink-soft: rgba(11, 37, 64, .74);
  --ab-line: rgba(11, 37, 64, .14);
  position: relative;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  isolation: isolate;
  padding: clamp(24px, 5vw, 48px) 0 clamp(48px, 8vw, 104px);
  background: var(--blue-deep);
  overflow: hidden;
}

.page-about .ab-hero__grid {
  position: absolute;
  inset: 0;
  z-index: -2;
  background-image: radial-gradient(circle at 1px 1px, rgba(127, 211, 232, .16) 1px, transparent 0);
  background-size: 34px 34px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .95) 0%, transparent 76%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .95) 0%, transparent 76%);
  pointer-events: none;
}

.page-about .ab-hero__glow {
  position: absolute;
  z-index: -1;
  top: -18%;
  right: -12%;
  width: min(620px, 78vw);
  height: min(620px, 78vw);
  background: radial-gradient(circle, rgba(255, 106, 26, .18) 0%, transparent 68%);
  pointer-events: none;
}

.page-about .ab-crumb {
  margin-bottom: clamp(18px, 3vw, 32px);
}

.page-about .ab-frame {
  position: relative;
  padding: clamp(26px, 5vw, 64px);
  border: 1px solid var(--ab-hair);
  background: linear-gradient(158deg, rgba(18, 26, 38, .78) 0%, rgba(11, 37, 64, .62) 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%);
}

.page-about .ab-frame__corner {
  position: absolute;
  width: 18px;
  height: 18px;
  border: 2px solid var(--orange);
}
.page-about .ab-frame__corner--tl { top: -1px; left: -1px; border-right: 0; border-bottom: 0; }
.page-about .ab-frame__corner--tr { top: -1px; right: -1px; border-left: 0; border-bottom: 0; }
.page-about .ab-frame__corner--bl { bottom: -1px; left: -1px; border-right: 0; border-top: 0; }
.page-about .ab-frame__corner--br { bottom: -1px; right: -1px; border-left: 0; border-top: 0; }

.page-about .ab-kicker {
  margin: 0 0 clamp(16px, 2.4vw, 24px);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--orange);
  text-transform: uppercase;
}

.page-about .ab-hero__title {
  margin: 0 0 clamp(16px, 2.4vw, 26px);
  font-family: var(--font-display);
  font-weight: 250;
  font-size: clamp(30px, 6vw, 68px);
  line-height: 1.08;
  letter-spacing: -.012em;
  color: #fff;
  max-width: 22ch;
}

.page-about .ab-hero__lede {
  margin: 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--silver);
}

.page-about .ab-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(28px, 4vw, 48px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--ab-hair-2);
  border: 1px solid var(--ab-hair-2);
}

.page-about .ab-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px 18px;
  background: rgba(11, 37, 64, .8);
}

.page-about .ab-hero__num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 500;
  letter-spacing: .04em;
  line-height: 1;
  color: var(--orange);
}

.page-about .ab-hero__lab {
  font-size: 13px;
  line-height: 1.55;
  color: var(--silver);
}

/* ---------- 章节通用 ---------- */
.page-about .ab-sec {
  position: relative;
  padding: clamp(56px, 9vw, 108px) 0;
}

.page-about .ab-sec--night { background: var(--blue-night); }
.page-about .ab-sec--deep { background: var(--blue-deep); }
.page-about .ab-sec--sky { background: var(--blue-sky); }
.page-about .ab-sec--mist { background: var(--mist); }

.page-about .ab-sec--mist .chapter__title { color: var(--ink); }
.page-about .ab-sec--mist .chapter__lede { color: var(--ab-ink-soft); }
.page-about .ab-sec--mist .chapter__num { color: var(--orange); }

.page-about .ab-head {
  max-width: 66ch;
}

.page-about .ab-sub {
  margin: 0 0 10px;
  font-size: clamp(18px, 2.1vw, 22px);
  font-weight: 500;
  line-height: 1.42;
  color: #fff;
}

.page-about .ab-body {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--silver);
  max-width: 40ch;
}

.page-about .ab-meta {
  margin: 16px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--ab-hair-2);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  line-height: 1.7;
  color: rgba(199, 208, 218, .78);
}

/* ---------- 01 业务定位 ---------- */
.page-about .ab-position {
  display: grid;
  gap: 1px;
  margin-top: clamp(28px, 4vw, 48px);
  background: var(--ab-hair-2);
  border: 1px solid var(--ab-hair-2);
}

.page-about .ab-position__item {
  position: relative;
  padding: clamp(22px, 3vw, 36px);
  background: rgba(18, 26, 38, .74);
}

.page-about .ab-position__tag {
  display: inline-block;
  margin-bottom: 14px;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--blue-deep);
  background: var(--orange);
}

.page-about .ab-position__item:nth-child(2) .ab-position__tag { background: var(--glass); }
.page-about .ab-position__item:nth-child(3) .ab-position__tag { background: var(--amber); }

/* ---------- 02 发展沿革 ---------- */
.page-about .ab-history {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  margin-top: clamp(28px, 4vw, 52px);
}

.page-about .ab-history__media {
  position: relative;
  margin: 0;
}

.page-about .ab-history__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--ab-line);
}

.page-about .ab-history__cap {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: rgba(11, 37, 64, .55);
}

.page-about .ab-timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 34px;
  list-style: none;
}

.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 12px;
  bottom: 18px;
  width: 2px;
  background: linear-gradient(180deg, var(--orange) 0%, var(--blue-sky) 42%, rgba(11, 37, 64, .16) 100%);
}

.page-about .ab-stage {
  position: relative;
  padding-bottom: clamp(22px, 3vw, 34px);
}

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

.page-about .ab-stage::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 5px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  box-sizing: border-box;
  background: var(--mist);
  border: 2px solid var(--blue-sky);
}

.page-about .ab-stage--now::before {
  background: var(--orange);
  border-color: var(--orange);
  box-shadow: 0 0 0 5px rgba(255, 106, 26, .16);
}

.page-about .ab-stage__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .16em;
  color: rgba(11, 37, 64, .5);
}

.page-about .ab-stage--now .ab-stage__idx { color: var(--orange); }

.page-about .ab-stage__name {
  margin: 6px 0 8px;
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 500;
  line-height: 1.36;
  color: var(--ink);
}

.page-about .ab-stage__text {
  margin: 0;
  max-width: 56ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ab-ink-soft);
}

/* ---------- 03 团队构成 ---------- */
.page-about .ab-team-wrap {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  margin-top: clamp(28px, 4vw, 48px);
}

.page-about .ab-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .ab-team__card {
  position: relative;
  padding: 24px 20px 26px;
  background: rgba(18, 26, 38, .66);
  border: 1px solid var(--ab-hair-2);
  border-radius: var(--radius-s);
  overflow: hidden;
  transition: background .18s var(--ease), transform .18s var(--ease);
}

.page-about .ab-team__card:hover {
  background: rgba(127, 211, 232, .1);
  transform: translateY(-2px);
}

.page-about .ab-team__bar {
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--orange);
}

.page-about .ab-team__card--data .ab-team__bar { background: var(--blue-sky); }
.page-about .ab-team__card--tech .ab-team__bar { background: var(--green); }
.page-about .ab-team__card--care .ab-team__bar { background: var(--amber); }

.page-about .ab-team__name {
  margin: 8px 0 4px;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.3;
  color: #fff;
}

.page-about .ab-team__role {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: rgba(199, 208, 218, .72);
}

.page-about .ab-team__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--silver);
}

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

.page-about .ab-team__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--ab-hair-2);
  border-radius: var(--radius-s);
}

.page-about .ab-team__media figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: rgba(199, 208, 218, .68);
}

/* ---------- 04 覆盖城市与本地服务 ---------- */
.page-about .ab-cover {
  display: grid;
  gap: 0;
  margin-top: clamp(28px, 4vw, 48px);
  border: 1px solid rgba(199, 208, 218, .2);
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(11, 37, 64, .58);
}

.page-about .ab-cover__media {
  margin: 0;
  overflow: hidden;
}

.page-about .ab-cover__media img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 200px;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-about .ab-cover__panel {
  padding: clamp(22px, 3.4vw, 40px);
  background: linear-gradient(180deg, rgba(11, 37, 64, .92) 0%, rgba(18, 26, 38, .92) 100%);
  border-top: 3px solid var(--orange);
}

.page-about .ab-cover__kicker {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--amber);
}

.page-about .ab-cover__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 16px;
}

.page-about .ab-cover__list li {
  padding-bottom: 16px;
  border-bottom: 1px dashed rgba(199, 208, 218, .18);
}

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

.page-about .ab-cover__list h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  color: #fff;
}

.page-about .ab-cover__list p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--silver);
}

/* ---------- 05 合作生态 ---------- */
.page-about .ab-flow {
  display: grid;
  gap: 1px;
  margin: clamp(28px, 4vw, 48px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--ab-line);
  border: 1px solid var(--ab-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .ab-flow__step {
  position: relative;
  padding: clamp(22px, 3vw, 34px);
  background: rgba(244, 247, 250, .96);
}

.page-about .ab-flow__no {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 500;
  letter-spacing: .04em;
  line-height: 1;
  color: var(--orange);
}

.page-about .ab-flow__title {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.36;
  color: var(--ink);
}

.page-about .ab-flow__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ab-ink-soft);
}

.page-about .ab-note {
  margin: clamp(24px, 3vw, 36px) 0 0;
  padding-left: 16px;
  border-left: 3px solid var(--orange);
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ab-ink-soft);
}

.page-about .ab-note a {
  color: var(--blue-sky);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .ab-note a:hover {
  color: var(--orange);
}

/* ---------- 06 更新机制 ---------- */
.page-about .ab-rhythm {
  display: grid;
  gap: 6px;
  margin-top: clamp(28px, 4vw, 48px);
}

.page-about .ab-rhythm__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: 18px 0;
  border-top: 1px solid var(--ab-hair-2);
}

.page-about .ab-rhythm__row:last-child {
  border-bottom: 1px solid var(--ab-hair-2);
}

.page-about .ab-rhythm__name {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  color: #fff;
}

.page-about .ab-rhythm__track {
  position: relative;
  display: block;
  height: 6px;
  border-radius: 3px;
  background: rgba(199, 208, 218, .14);
  overflow: hidden;
}

.page-about .ab-rhythm__fill {
  display: block;
  height: 100%;
  border-radius: 3px;
}

.page-about .ab-rhythm__fill--fast {
  width: 92%;
  background: linear-gradient(90deg, var(--green), var(--glass));
}

.page-about .ab-rhythm__fill--mid {
  width: 62%;
  background: linear-gradient(90deg, var(--orange), var(--amber));
}

.page-about .ab-rhythm__fill--slow {
  width: 34%;
  background: linear-gradient(90deg, var(--blue-sky), var(--glass));
}

.page-about .ab-rhythm__val {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .06em;
  color: var(--orange);
}

.page-about .ab-rhythm__desc {
  margin: 0;
  grid-column: 1 / -1;
  font-size: 14.5px;
  line-height: 1.74;
  color: rgba(199, 208, 218, .82);
}

.page-about .ab-outro {
  margin-top: clamp(34px, 5vw, 58px);
  padding: clamp(20px, 3vw, 32px);
  border: 1px solid var(--ab-hair-2);
  border-left: 3px solid var(--orange);
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
  background: rgba(127, 211, 232, .07);
}

.page-about .ab-outro p {
  margin: 0;
  max-width: 68ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--silver);
}

.page-about .ab-outro a {
  color: var(--glass);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .ab-outro a:hover {
  color: var(--orange);
}

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

  .page-about .ab-hero__facts li {
    padding: 20px 22px;
  }
}

@media (min-width: 720px) {
  .page-about .ab-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .ab-rhythm__row {
    grid-template-columns: 132px minmax(0, 1fr) 150px;
    align-items: center;
    gap: 22px;
  }

  .page-about .ab-rhythm__desc {
    grid-column: 2 / -1;
    padding-bottom: 4px;
  }

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

@media (min-width: 900px) {
  .page-about .ab-cover {
    grid-template-columns: 1.35fr 1fr;
  }

  .page-about .ab-cover__panel {
    border-top: 0;
    border-left: 3px solid var(--orange);
  }

  .page-about .ab-cover__media img {
    aspect-ratio: auto;
    min-height: 100%;
  }

  .page-about .ab-history {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-about .ab-history__media {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }
}

@media (min-width: 1000px) {
  .page-about .ab-team-wrap {
    grid-template-columns: 1.42fr 1fr;
    align-items: start;
  }

  .page-about .ab-team__media {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }
}

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