.page-about {
  --about-gap: clamp(22px, 3vw, 40px);
  padding-bottom: 0;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding-top: clamp(14px, 2vw, 22px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(20px, 3.4vw, 44px) 0 clamp(30px, 4.6vw, 64px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(118% 88% at 88% 0%, rgba(18, 196, 139, .14), transparent 58%),
    linear-gradient(180deg, var(--bg-deep), var(--bg));
}

.page-about .about-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  align-items: center;
}

.page-about .about-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--gold);
}

.page-about .about-hero__eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--gold);
}

.page-about .about-hero h1 {
  margin: 0 0 16px;
  font-size: clamp(30px, 6.2vw, 42px);
  line-height: 1.16;
  letter-spacing: -.02em;
  font-weight: 800;
  color: var(--white);
}

.page-about .about-hero__lead {
  margin: 0 0 24px;
  max-width: 58ch;
  color: var(--text);
}

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

.page-about .about-hero__figure {
  margin: 0;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 11 / 7;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: 0 18px 40px -28px rgba(0, 0, 0, .85);
}

.page-about .about-hero__figure figcaption {
  margin-top: 14px;
  padding-left: 14px;
  border-left: 1px solid var(--green);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 关键数字带 ---------- */
.page-about .about-band {
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}

.page-about .about-band__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
}

.page-about .about-band__item {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: clamp(18px, 2.6vw, 28px) clamp(16px, 2vw, 24px);
  background: var(--panel);
}

.page-about .about-band__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--gold);
}

.page-about .about-band__label {
  font-size: 13px;
  line-height: 1.55;
  color: var(--muted);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-sec {
  padding: clamp(40px, 5.4vw, 80px) 0 0;
}

.page-about .about-sec__head {
  max-width: 76ch;
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-about .about-sec__num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .24em;
  color: var(--gold);
}

.page-about .about-sec__title {
  margin: 0 0 10px;
  font-size: clamp(23px, 3.4vw, 32px);
  line-height: 1.24;
  letter-spacing: -.02em;
  font-weight: 800;
  color: var(--white);
}

.page-about .about-sec__note {
  margin: 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .about-sec__head::after {
  content: "";
  display: block;
  width: 48px;
  height: 2px;
  margin-top: 16px;
  background: linear-gradient(90deg, var(--green), var(--gold));
}

/* ---------- 01 原则 ---------- */
.page-about .about-principles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-principle {
  position: relative;
  padding: clamp(20px, 2.8vw, 30px);
  background: var(--panel);
}

.page-about .about-principle::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: var(--green);
}

.page-about .about-principle:nth-child(2)::before { background: var(--gold); }
.page-about .about-principle:nth-child(3)::before { background: var(--cyan); }

.page-about .about-principle__idx {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--green);
}

.page-about .about-principle:nth-child(2) .about-principle__idx { color: var(--gold); }
.page-about .about-principle:nth-child(3) .about-principle__idx { color: var(--cyan); }

.page-about .about-principle h3 {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.42;
  color: var(--white);
}

.page-about .about-principle p {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--muted);
}

/* ---------- 02 时间轴 ---------- */
.page-about .timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 26px;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--green), var(--cyan) 55%, var(--gold));
  opacity: .6;
}

.page-about .timeline__item {
  position: relative;
  padding-bottom: clamp(18px, 2.4vw, 28px);
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 7px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--green);
}

.page-about .timeline__item:nth-child(5)::before { border-color: var(--cyan); }
.page-about .timeline__item:nth-child(6)::before { border-color: var(--orange); }
.page-about .timeline__item:nth-child(7)::before { border-color: var(--gold); }

.page-about .timeline__year {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(20px, 2.8vw, 28px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--gold);
}

.page-about .timeline__title {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--white);
}

.page-about .timeline__text {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 版本刻度 ---------- */
.page-about .about-version {
  margin-top: clamp(22px, 3vw, 34px);
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.page-about .about-version__label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--muted);
}

.page-about .about-version__ticks {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 14px;
  padding: 0;
  list-style: none;
}

.page-about .about-version__tick {
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--muted);
}

.page-about .about-version__tick--now {
  border-color: var(--gold);
  background: var(--gold);
  color: var(--bg-deep);
}

.page-about .about-version__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 03 团队 ---------- */
.page-about .team-scale {
  display: flex;
  height: 14px;
  margin-bottom: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg);
}

.page-about .team-scale__seg {
  display: block;
  height: 100%;
}

.page-about .team-scale__seg--data { flex: 36; background: var(--green); }
.page-about .team-scale__seg--service { flex: 42; background: var(--gold); }
.page-about .team-scale__seg--tech { flex: 28; background: var(--cyan); }
.page-about .team-scale__seg--governance { flex: 14; background: var(--orange); }

.page-about .team-cards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .team-card {
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--panel);
}

.page-about .team-card::before {
  content: "";
  display: block;
  width: 28px;
  height: 2px;
  margin-bottom: 16px;
  background: var(--green);
}

.page-about .team-card:nth-child(2)::before { background: var(--gold); }
.page-about .team-card:nth-child(3)::before { background: var(--cyan); }
.page-about .team-card:nth-child(4)::before { background: var(--orange); }

.page-about .team-card__num {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(30px, 3.8vw, 40px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--white);
}

.page-about .team-card__unit {
  margin-left: 4px;
  font-size: 13px;
  font-weight: 400;
  color: var(--muted);
}

.page-about .team-card__name {
  margin: 12px 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--white);
}

.page-about .team-card__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 04 数据运营 ---------- */
.page-about .ops-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
}

.page-about .ops-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .ops-list__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .ops-list__tag {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-about .ops-list__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text);
}

.page-about .ops-figure {
  margin: 0;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.page-about .ops-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 25 / 14;
  object-fit: cover;
  border-radius: var(--radius);
}

.page-about .ops-figure figcaption {
  margin-top: 12px;
  font-size: 12.5px;
  line-height: 1.68;
  color: var(--muted);
}

/* ---------- 05 服务 ---------- */
.page-about .service-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
}

.page-about .service-steps {
  counter-reset: svc;
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .service-step {
  counter-increment: svc;
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--panel);
}

.page-about .service-step::before {
  content: "0" counter(svc);
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--gold);
}

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

.page-about .service-step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .service-side {
  padding: clamp(20px, 2.6vw, 28px);
  border: 1px solid var(--line);
  border-left: 2px solid var(--orange);
  border-radius: var(--radius);
  background: var(--panel);
}

.page-about .service-side__title {
  margin: 0 0 16px;
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
}

.page-about .service-side dl {
  margin: 0;
  display: grid;
  gap: 14px;
}

.page-about .service-side__row {
  display: grid;
  gap: 3px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

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

.page-about .service-side dt {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--muted);
}

.page-about .service-side dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text);
  word-break: break-word;
}

/* ---------- 06 合肥 ---------- */
.page-about .hefei-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  align-items: center;
}

.page-about .hefei-address {
  margin: 0 0 18px;
  padding-left: 18px;
  border-left: 2px solid var(--green);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.72;
  color: var(--white);
}

.page-about .hefei-copy > p {
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.82;
  color: var(--muted);
}

.page-about .hefei-facts {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .hefei-facts__item {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-size: 14.5px;
  line-height: 1.6;
}

.page-about .hefei-facts__item:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .hefei-facts__key {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--muted);
}

.page-about .hefei-facts__val {
  color: var(--text);
  word-break: break-word;
}

.page-about .hefei-figure {
  margin: 0;
}

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

.page-about .hefei-figure figcaption {
  margin-top: 12px;
  font-size: 12.5px;
  line-height: 1.68;
  color: var(--muted);
}

/* ---------- 后续入口 ---------- */
.page-about .about-next {
  margin-top: clamp(44px, 5.4vw, 80px);
  padding: clamp(32px, 4.4vw, 56px) 0;
  border-top: 1px solid var(--line);
  background: var(--panel);
}

.page-about .about-next__title {
  margin: 0 0 22px;
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-about .about-next__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-next__link {
  display: block;
  height: 100%;
  padding: clamp(18px, 2.2vw, 24px);
  background: var(--panel);
  color: inherit;
  text-decoration: none;
  transition: background .2s var(--ease);
}

.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  background: var(--panel-hi);
}

.page-about .about-next__name {
  display: block;
  margin-bottom: 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
}

.page-about .about-next__desc {
  display: block;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .ops-list__item {
    grid-template-columns: 140px minmax(0, 1fr);
    gap: 0 20px;
    align-items: baseline;
  }
}

@media (min-width: 700px) {
  .page-about .team-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-next__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .about-band__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-principles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 880px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 6.4fr) minmax(0, 5fr);
    gap: clamp(32px, 5vw, 72px);
  }
  .page-about .about-hero h1 {
    font-size: clamp(38px, 3.7vw, 52px);
  }
}

@media (min-width: 940px) {
  .page-about .ops-grid,
  .page-about .service-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
  .page-about .hefei-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
  }
}

@media (min-width: 1060px) {
  .page-about .team-cards {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-next__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}