.page-about {
  --about-pad: clamp(52px, 8vw, 104px);
  --about-gap: clamp(20px, 3vw, 34px);
}

.page-about .section {
  padding-block: var(--about-pad);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  display: grid;
  align-items: end;
  min-height: clamp(460px, 68vh, 660px);
  overflow: hidden;
  background: var(--ink);
  border-block: 1px solid var(--line);
}

.page-about .about-hero__media {
  position: absolute;
  inset: 0;
}

.page-about .about-hero__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 42%;
  opacity: .42;
}

.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(120% 78% at 80% 6%, rgba(34, 224, 208, .24), transparent 62%),
    radial-gradient(80% 60% at 6% 96%, rgba(140, 123, 255, .18), transparent 68%),
    linear-gradient(180deg, rgba(6, 26, 22, .48) 0%, rgba(6, 26, 22, .93) 76%);
}

.page-about .about-hero__body {
  position: relative;
  z-index: 1;
  padding-block: clamp(52px, 11vw, 118px) clamp(40px, 7vw, 76px);
}

.page-about .about-hero__eyebrow {
  margin: 0;
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-hero__title {
  margin: 16px 0 0;
  font-size: clamp(2rem, 5.6vw, 3.5rem);
  line-height: 1.16;
  letter-spacing: .02em;
  color: var(--fog);
  max-width: 22ch;
}

.page-about .about-hero__lead {
  margin: 22px 0 0;
  max-width: 62ch;
  font-size: clamp(.98rem, 1.6vw, 1.08rem);
  line-height: 1.78;
  color: var(--silver);
}

.page-about .about-hero__index {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__index-link {
  display: inline-block;
  padding: 7px 15px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--silver);
  text-decoration: none;
  transition: color .16s var(--ease), background-color .16s var(--ease), border-color .16s var(--ease);
}

.page-about .about-hero__index-link:hover,
.page-about .about-hero__index-link:focus-visible {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

/* ---------- 城市叙事 ---------- */

.page-about .about-city {
  background: var(--ink);
}

.page-about .about-city__grid {
  display: grid;
  gap: 34px;
}

.page-about .about-city__title {
  margin: 12px 0 0;
  font-size: var(--fs-title);
  line-height: 1.28;
  letter-spacing: .02em;
  color: var(--fog);
}

.page-about .about-city__para {
  margin: 20px 0 0;
  font-size: clamp(.96rem, 1.5vw, 1.02rem);
  line-height: 1.86;
  color: var(--silver);
}

.page-about .about-city__aside {
  padding-top: 4px;
}

.page-about .about-city__note {
  margin: 0 0 24px;
  padding-left: 18px;
  border-left: 2px solid var(--cyan);
  font-size: clamp(1rem, 1.8vw, 1.12rem);
  line-height: 1.7;
  color: var(--fog);
}

.page-about .about-city__points {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-city__points li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-city__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 8px;
  height: 1px;
  background: var(--orange);
}

/* ---------- 业务线 ---------- */

.page-about .about-work {
  background: linear-gradient(180deg, var(--ink) 0%, var(--char) 100%);
}

.page-about .work-grid {
  display: grid;
  gap: 14px;
  margin-top: clamp(28px, 4vw, 44px);
}

.page-about .work-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 24px 22px 26px;
  background: linear-gradient(158deg, var(--glass), var(--glass-dark));
  border: 1px solid var(--line);
  transition: border-color .2s var(--ease), transform .2s var(--ease);
}

.page-about .work-card:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

.page-about .work-card__no {
  font-family: var(--font-num);
  font-size: 32px;
  line-height: 1;
  letter-spacing: .06em;
  color: rgba(34, 224, 208, .55);
  font-variant-numeric: tabular-nums;
}

.page-about .work-card__title {
  margin: 0;
  font-size: 18px;
  line-height: 1.4;
  letter-spacing: .02em;
  color: var(--fog);
}

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

/* ---------- 团队 ---------- */

.page-about .about-team {
  background: var(--ink);
}

.page-about .about-team__grid {
  display: grid;
  gap: var(--about-gap);
  margin-top: clamp(28px, 4vw, 46px);
}

.page-about .about-team__figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--char);
}

.page-about .about-team__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 14 / 9;
}

.page-about .about-team__cap {
  padding: 14px 18px 16px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.page-about .team-stats {
  display: grid;
  gap: 12px;
}

.page-about .team-card {
  padding: 20px 18px 22px;
  border: 1px solid var(--line);
  border-left: 2px solid rgba(34, 224, 208, .38);
  background: linear-gradient(160deg, var(--glass), var(--glass-dark));
}

.page-about .team-card__num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(2rem, 5vw, 2.6rem);
  line-height: .95;
  letter-spacing: -.01em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .team-card__role {
  margin: 10px 0 0;
  font-size: 15px;
  letter-spacing: .04em;
  color: var(--fog);
}

.page-about .team-card__desc {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.68;
  color: var(--muted);
}

/* ---------- 发展历程 ---------- */

.page-about .about-history {
  background: var(--char);
}

.page-about .history-grid {
  display: grid;
  gap: var(--about-gap);
  margin-top: clamp(28px, 4vw, 46px);
}

.page-about .history-track {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .history-track::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 8px;
  bottom: 14px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan) 0%, rgba(34, 224, 208, .38) 42%, rgba(34, 224, 208, .06) 100%);
}

.page-about .history-node {
  position: relative;
  padding: 0 0 30px 30px;
}

.page-about .history-node:last-child {
  padding-bottom: 0;
}

.page-about .history-node::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--char);
  border: 1px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(34, 224, 208, .09);
}

.page-about .history-node:last-child::before {
  background: var(--cyan);
  box-shadow: 0 0 0 5px rgba(34, 224, 208, .16);
}

.page-about .history-node__era {
  display: inline-block;
  margin-bottom: 10px;
  padding: 3px 10px;
  border: 1px solid var(--line-strong);
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--cyan);
}

.page-about .history-node__title {
  margin: 0;
  font-size: 17px;
  line-height: 1.45;
  letter-spacing: .02em;
  color: var(--fog);
}

.page-about .history-node__text {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
  max-width: 58ch;
}

.page-about .history-aside {
  border: 1px solid var(--line);
  background: var(--ink);
}

.page-about .history-aside__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 1 / 1;
  opacity: .86;
}

.page-about .history-aside__cap {
  margin: 0;
  padding: 14px 18px 16px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

/* ---------- 内容与数据能力 ---------- */

.page-about .about-cap {
  background: var(--ink);
}

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

.page-about .cap-lead {
  margin: 20px 0 0;
  font-size: clamp(.96rem, 1.5vw, 1.02rem);
  line-height: 1.82;
  color: var(--silver);
}

.page-about .cap-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .cap-item {
  display: grid;
  gap: 8px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.page-about .cap-item:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .cap-item__key {
  font-family: var(--font-num);
  font-size: clamp(1.2rem, 2.4vw, 1.5rem);
  line-height: 1.1;
  letter-spacing: .02em;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}

.page-about .cap-item__title {
  margin: 0;
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: .02em;
  color: var(--fog);
}

.page-about .cap-item__text {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

.page-about .cap-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 224, 208, .4);
}

.page-about .cap-link:hover,
.page-about .cap-link:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ---------- 合作与认可 ---------- */

.page-about .about-partners {
  background: linear-gradient(180deg, var(--ink) 0%, var(--char) 100%);
}

.page-about .partner-grid {
  display: grid;
  gap: 14px;
  margin-top: clamp(28px, 4vw, 44px);
}

.page-about .partner-card {
  padding: 22px 20px 24px;
  border: 1px solid var(--line);
  background: var(--glass-dark);
}

.page-about .partner-card__tag {
  display: inline-block;
  padding: 3px 9px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .12em;
  border: 1px solid currentColor;
}

.page-about .partner-card__tag--cyan {
  color: var(--cyan);
}

.page-about .partner-card__tag--orange {
  color: var(--orange);
}

.page-about .partner-card__tag--purple {
  color: var(--purple);
}

.page-about .partner-card__title {
  margin: 14px 0 0;
  font-size: 17px;
  line-height: 1.45;
  letter-spacing: .02em;
  color: var(--fog);
}

.page-about .partner-card__text {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 收尾 ---------- */

.page-about .about-cta {
  border-top: 1px solid var(--line);
  background:
    radial-gradient(90% 150% at 10% 0%, rgba(34, 224, 208, .16), transparent 62%),
    radial-gradient(70% 120% at 92% 100%, rgba(255, 122, 47, .12), transparent 66%),
    var(--char);
}

.page-about .about-cta__inner {
  display: grid;
  gap: 24px;
  padding-block: clamp(44px, 7vw, 80px);
}

.page-about .about-cta__title {
  margin: 0;
  font-size: var(--fs-title);
  line-height: 1.28;
  letter-spacing: .02em;
  color: var(--fog);
}

.page-about .about-cta__text {
  margin: 12px 0 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--silver);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .cap-item {
    grid-template-columns: 170px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
  }

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

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

@media (min-width: 760px) {
  .page-about .work-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-about .about-city__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: clamp(40px, 5vw, 72px);
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
    gap: clamp(32px, 4vw, 54px);
    align-items: start;
  }

  .page-about .history-grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 64px);
    align-items: start;
  }

  .page-about .cap-grid {
    grid-template-columns: minmax(0, .78fr) minmax(0, 1.22fr);
    gap: clamp(36px, 5vw, 68px);
    align-items: start;
  }

  .page-about .cap-intro {
    position: sticky;
    top: 96px;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, .7fr);
    align-items: center;
    gap: 40px;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1080px) {
  .page-about .work-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .work-card {
    transition: none;
  }

  .page-about .work-card:hover {
    transform: none;
  }
}