.page-about {
  --about-gap: clamp(16px, 3.2vw, 32px);
  --about-line-soft: #17384f;
  --about-tint: rgba(12, 35, 56, .62);
  display: block;
  background:
    radial-gradient(115% 70% at 100% 0%, rgba(11, 122, 85, .34), transparent 62%),
    radial-gradient(90% 60% at 0% 100%, rgba(9, 79, 56, .3), transparent 60%),
    var(--c-ink);
}

.page-about .about-lede {
  margin: 12px 0 0;
  max-width: 62ch;
  color: var(--c-slate);
  font-size: 16px;
  line-height: 1.75;
}

.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

.page-about .about-roles > [data-reveal]:nth-child(2) { transition-delay: 90ms; }
.page-about .about-roles > [data-reveal]:nth-child(3) { transition-delay: 180ms; }
.page-about .about-pipe > [data-reveal]:nth-child(2) { transition-delay: 70ms; }
.page-about .about-pipe > [data-reveal]:nth-child(3) { transition-delay: 140ms; }
.page-about .about-pipe > [data-reveal]:nth-child(4) { transition-delay: 210ms; }
.page-about .about-tl:nth-child(2) { transition-delay: 80ms; }
.page-about .about-tl:nth-child(3) { transition-delay: 160ms; }
.page-about .about-tl:nth-child(4) { transition-delay: 240ms; }
.page-about .about-net-grid > [data-reveal]:nth-child(2) { transition-delay: 90ms; }
.page-about .about-net-grid > [data-reveal]:nth-child(3) { transition-delay: 180ms; }

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
    transition-delay: 0ms;
  }
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(20px, 4vw, 36px);
}

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(18px, 3vw, 30px);
}

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

.page-about .about-hero__copy .label {
  display: inline-block;
  margin: 0 0 12px;
}

.page-about .about-hero__copy .title-xl {
  margin: 0;
  max-width: 22ch;
}

.page-about .about-hero__copy .lead {
  margin: 18px 0 0;
  max-width: 62ch;
}

.page-about .about-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--about-line-soft);
}

.page-about .about-fact {
  padding: 16px 14px 16px 0;
  border-bottom: 1px solid var(--about-line-soft);
}

.page-about .about-fact:nth-child(odd) {
  border-right: 1px solid var(--about-line-soft);
  padding-right: 16px;
}

.page-about .about-fact:nth-child(even) {
  padding-left: 16px;
}

.page-about .about-fact__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 7vw, 34px);
  font-weight: 700;
  line-height: 1.05;
  color: var(--c-lime);
  letter-spacing: -.01em;
}

.page-about .about-fact__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  color: var(--c-slate);
  letter-spacing: .04em;
}

/* ---------- 团队 ---------- */
.page-about .about-team .section__head {
  margin-bottom: var(--about-gap);
}

.page-about .about-roles {
  display: grid;
  gap: 14px;
}

.page-about .about-role {
  position: relative;
  padding: 22px 20px 20px;
  border-left: 3px solid var(--c-night);
  background: linear-gradient(160deg, var(--about-tint), rgba(7, 26, 43, .2));
  border-radius: 0 var(--radius-m) var(--radius-m) 0;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-role--region { border-left-color: var(--c-teal); }
.page-about .about-role--viz { border-left-color: var(--c-score); }

.page-about .about-role:hover,
.page-about .about-role:focus-within {
  transform: translateY(-3px);
}

.page-about .about-role__idx {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--c-lime);
}

.page-about .about-role__name {
  margin: 0 0 10px;
  font-size: 20px;
  font-weight: 800;
  color: var(--c-paper);
}

.page-about .about-role__desc {
  margin: 0 0 14px;
  color: var(--c-slate);
  font-size: 15px;
  line-height: 1.72;
}

.page-about .about-role__list {
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
  color: var(--c-paper);
}

.page-about .about-role__list li {
  position: relative;
  padding: 7px 0 7px 16px;
  border-top: 1px dashed var(--about-line-soft);
}

.page-about .about-role__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 15px;
  width: 6px;
  height: 6px;
  background: var(--c-night);
  border-radius: 50%;
}

.page-about .about-role--region .about-role__list li::before { background: var(--c-teal); }
.page-about .about-role--viz .about-role__list li::before { background: var(--c-score); }

/* ---------- 双城 ---------- */
.page-about .about-cities .section__head {
  margin-bottom: var(--about-gap);
}

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

.page-about .about-city {
  overflow: hidden;
  border-radius: var(--radius-m);
  background: var(--c-panel);
  border-top: 4px solid var(--c-night);
}

.page-about .about-city--cd {
  border-top-color: var(--c-score);
}

.page-about .about-city .media {
  margin: 0;
}

.page-about .about-city .media__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

.page-about .about-city__body {
  padding: 20px 20px 24px;
}

.page-about .about-city__name {
  margin: 8px 0 12px;
  font-size: clamp(21px, 3vw, 26px);
  font-weight: 800;
  font-style: italic;
  color: var(--c-paper);
}

.page-about .about-city__desc {
  margin: 0 0 16px;
  color: var(--c-slate);
  font-size: 15px;
  line-height: 1.75;
}

.page-about .about-city__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
  font-size: 14px;
  color: var(--c-paper);
}

.page-about .about-city__list li {
  padding: 8px 12px;
  background: rgba(4, 18, 30, .55);
  border-left: 2px solid var(--c-night);
}

.page-about .about-city--cd .about-city__list li {
  border-left-color: var(--c-score);
}

/* ---------- 发布节奏 ---------- */
.page-about .about-flow .section__head {
  margin-bottom: var(--about-gap);
}

.page-about .about-pipe {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
  counter-reset: pipe;
}

.page-about .about-pipe__step {
  position: relative;
  padding: 18px 18px 20px;
  background: rgba(7, 26, 43, .55);
  border: 1px solid var(--about-line-soft);
  border-radius: var(--radius-s);
}

.page-about .about-pipe__idx {
  display: inline-block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--c-lime);
}

.page-about .about-pipe__name {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 800;
  color: var(--c-paper);
}

.page-about .about-pipe__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-slate);
}

.page-about .about-flow__note {
  margin: var(--about-gap) 0 0;
  padding: 16px 18px;
  border-left: 3px solid var(--c-score);
  background: rgba(255, 90, 54, .09);
  color: var(--c-paper);
  font-size: 15px;
  line-height: 1.7;
}

.page-about .about-flow__num {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  color: var(--c-score);
  margin-right: 6px;
}

/* ---------- 时间轴 ---------- */
.page-about .about-history .section__head {
  margin-bottom: var(--about-gap);
}

.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 4px 0 4px 30px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-lime), var(--c-night) 45%, var(--c-line-soft));
}

.page-about .about-tl {
  position: relative;
  padding-bottom: 28px;
}

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

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 7px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--c-lime);
  box-shadow: 0 0 0 4px rgba(198, 249, 78, .14);
}

.page-about .about-tl__year {
  display: block;
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: .12em;
  color: var(--c-lime);
  margin-bottom: 6px;
}

.page-about .about-tl__title {
  margin: 0 0 6px;
  font-size: 18px;
  font-weight: 800;
  color: var(--c-paper);
}

.page-about .about-tl__desc {
  margin: 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-slate);
}

/* ---------- 合作生态 ---------- */
.page-about .about-network .section__head {
  margin-bottom: var(--about-gap);
}

.page-about .about-net-grid {
  display: grid;
  gap: 14px;
}

.page-about .about-net {
  padding: 20px;
  border-radius: var(--radius-m);
  background: linear-gradient(200deg, rgba(79, 209, 197, .12), rgba(7, 26, 43, .3));
  border-bottom: 2px solid var(--about-line-soft);
}

.page-about .about-net__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(32px, 8vw, 42px);
  font-weight: 700;
  line-height: 1;
  color: var(--c-teal);
}

.page-about .about-net__name {
  margin: 12px 0 8px;
  font-size: 18px;
  font-weight: 800;
  color: var(--c-paper);
}

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

.page-about .about-honor {
  display: grid;
  gap: 10px;
  margin-top: var(--about-gap);
  padding-top: 18px;
  border-top: 1px solid var(--about-line-soft);
}

.page-about .about-honor__item {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  color: var(--c-paper);
}

/* ---------- 苏州运营中心 ---------- */
.page-about .about-suzhou__grid {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-suzhou .section__title {
  margin-top: 10px;
}

.page-about .about-suzhou__desc {
  margin: 16px 0 22px;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--c-slate);
}

.page-about .about-contact {
  margin: 0 0 18px;
  padding: 0;
  border-top: 1px solid var(--about-line-soft);
}

.page-about .about-contact__row {
  display: grid;
  gap: 2px;
  padding: 12px 0;
  border-bottom: 1px solid var(--about-line-soft);
}

.page-about .about-contact dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--c-slate);
}

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

.page-about .about-suzhou__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-slate);
}

.page-about .about-suzhou__media {
  margin: 0;
  border-radius: var(--radius-m);
  overflow: hidden;
  background: var(--c-panel);
}

.page-about .about-suzhou__media .media__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 7 / 5;
}

.page-about .about-suzhou__media .media__caption {
  margin: 0;
  padding: 12px 16px;
  font-size: 13px;
  color: var(--c-slate);
  background: rgba(4, 18, 30, .6);
}

/* ---------- 收尾 ---------- */
.page-about .about-close__inner {
  padding: clamp(22px, 4vw, 38px);
  border-radius: var(--radius-l);
  background:
    linear-gradient(135deg, rgba(11, 122, 85, .3), rgba(7, 26, 43, .2) 55%),
    var(--c-panel);
}

.page-about .about-close__text {
  margin: 16px 0 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-slate);
}

.page-about .about-link {
  color: var(--c-lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(198, 249, 78, .45);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

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

/* ---------- 桌面 ---------- */
@media (min-width: 860px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr);
    align-items: start;
    gap: clamp(24px, 4vw, 56px);
  }

  .page-about .about-facts {
    grid-template-columns: 1fr 1fr;
    border-top: 0;
  }

  .page-about .about-fact {
    padding: 18px 16px;
  }

  .page-about .about-fact:nth-child(odd) {
    padding-left: 0;
  }

  .page-about .about-fact:nth-child(even) {
    border-right: 0;
  }

  .page-about .about-roles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-city-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(20px, 3vw, 32px);
  }

  .page-about .about-pipe {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-timeline {
    padding-left: 34px;
  }

  .page-about .about-tl {
    display: grid;
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 18px;
    align-items: start;
  }

  .page-about .about-tl__year {
    text-align: right;
    padding-top: 2px;
    margin-bottom: 0;
  }

  .page-about .about-net-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

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

  .page-about .about-suzhou__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: center;
    gap: clamp(24px, 4vw, 56px);
  }

  .page-about .about-contact__row {
    grid-template-columns: 130px minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }

  .page-about .about-suzhou__media .media__img {
    aspect-ratio: 14 / 9;
  }
}

.page-about {
  --c-line-soft: transparent;
}