.page-about {
  --about-soft: rgba(228, 192, 112, .14);
  --about-panel: rgba(17, 21, 36, .72);
  position: relative;
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-block: clamp(20px, 4vw, 46px) clamp(28px, 5vw, 62px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    linear-gradient(126deg, rgba(228, 192, 112, .18) 0%, rgba(73, 214, 232, .07) 38%, rgba(7, 10, 20, 0) 66%),
    radial-gradient(90% 72% at 92% 2%, rgba(164, 104, 255, .20), rgba(7, 10, 20, 0) 62%);
}

.page-about .about-hero__inner {
  display: flex;
  flex-direction: column;
  gap: clamp(12px, 2vw, 20px);
}

.page-about .crumbs {
  margin-bottom: 4px;
}

.page-about .about-hero .display {
  margin: 0;
  max-width: 17em;
}

.page-about .about-hero .lede {
  margin: 0;
  max-width: 34em;
  color: var(--paper);
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.85;
}

.page-about .about-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--mist);
}

.page-about .about-facts li {
  display: inline-flex;
  align-items: center;
  gap: 9px;
}

.page-about .about-facts li::before {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 10px var(--about-soft);
}

/* ---------- 城市氛围图 ---------- */
.page-about .about-city {
  position: relative;
  margin: 0;
  isolation: isolate;
}

.page-about .about-city img {
  display: block;
  width: 100%;
  height: auto;
  max-height: min(52vh, 470px);
  object-fit: cover;
}

.page-about .about-city::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(7, 10, 20, .92) 0%, rgba(7, 10, 20, .10) 40%, rgba(7, 10, 20, .95) 100%),
    linear-gradient(90deg, rgba(7, 10, 20, .60) 0%, rgba(7, 10, 20, 0) 58%);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline .headline {
  margin-bottom: 14px;
}

.page-about .brand-timeline {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  margin-top: clamp(26px, 4vw, 48px);
}

.page-about .tl-index {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  margin: 0;
  padding: 2px 2px 12px;
  list-style: none;
  overflow-x: auto;
}

.page-about .tl-year {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 7px 15px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  background: var(--plate);
  color: var(--paper);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color .3s var(--ease), color .3s var(--ease), transform .3s var(--ease);
}

.page-about .tl-year .mono-num {
  font-size: 13px;
  letter-spacing: .12em;
}

.page-about .tl-year-label {
  font-size: 12px;
  color: var(--mist);
  transition: color .3s var(--ease);
}

.page-about .tl-year:hover,
.page-about .tl-year:focus-visible {
  border-color: var(--gold);
  color: var(--gold);
  transform: translateY(-2px);
}

.page-about .tl-year:hover .tl-year-label,
.page-about .tl-year:focus-visible .tl-year-label {
  color: var(--gold);
}

.page-about .tl-track {
  display: flex;
  flex-direction: column;
}

.page-about .tl-node {
  position: relative;
  padding: 2px 0 clamp(30px, 5vw, 52px) clamp(20px, 4vw, 34px);
  border-left: 1px solid var(--line);
}

.page-about .tl-node:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}

.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(228, 192, 112, .13), 0 0 16px rgba(228, 192, 112, .45);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}

.page-about .tl-node:hover::before,
.page-about .tl-node:focus-within::before {
  transform: scale(1.45);
  box-shadow: 0 0 0 7px rgba(228, 192, 112, .18), 0 0 26px rgba(228, 192, 112, .58);
}

.page-about .tl-meta {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--gold);
}

.page-about .tl-title {
  margin: 0 0 10px;
  font-size: clamp(19px, 2.2vw, 26px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--paper);
  transition: color .3s var(--ease);
}

.page-about .tl-node:hover .tl-title {
  color: var(--gold);
}

.page-about .tl-body {
  margin: 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
  align-items: center;
}

.page-about .about-team__grid .headline {
  margin-bottom: 12px;
}

.page-about .about-team__media {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--r-l);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

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

.page-about .about-roles {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: clamp(28px, 4vw, 48px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .role-card {
  padding: 22px 22px 24px;
  border: 1px solid var(--line);
  border-radius: var(--r-m);
  background: linear-gradient(162deg, rgba(17, 21, 36, .92), rgba(7, 10, 20, .68));
  transition: transform .3s var(--ease), border-color .3s var(--ease);
}

.page-about .role-card:hover {
  transform: translateY(-4px);
  border-color: rgba(228, 192, 112, .42);
}

.page-about .role-num {
  display: inline-block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--gold);
}

.page-about .role-card h3 {
  margin: 0 0 8px;
  font-size: 17px;
  line-height: 1.45;
  color: var(--paper);
}

.page-about .role-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 四步流程 ---------- */
.page-about .about-flow-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: clamp(30px, 5vw, 52px) 0 0;
  padding: 0;
  list-style: none;
  counter-reset: flow;
}

.page-about .about-flow-steps > li {
  position: relative;
  padding: 22px 20px 24px;
  border: 1px solid var(--line);
  border-radius: var(--r-m);
  background: var(--about-panel);
}

.page-about .about-flow-steps > li::before {
  counter-increment: flow;
  content: "0" counter(flow);
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--cyan);
}

.page-about .about-flow-steps h3 {
  margin: 0 0 8px;
  font-size: 16px;
  color: var(--paper);
}

.page-about .about-flow-steps p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 维护节奏 ---------- */
.page-about .about-keep .headline {
  margin-bottom: 14px;
}

.page-about .about-cadence {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .cad-item {
  padding: 22px 22px 24px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--clay);
  border-radius: var(--r-m);
  background: var(--about-panel);
}

.page-about .cad-when {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--clay);
}

.page-about .cad-item h3 {
  margin: 0 0 8px;
  font-size: 17px;
  color: var(--paper);
}

.page-about .cad-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-flow {
  margin: clamp(28px, 4vw, 48px) 0 0;
  border: 1px solid var(--line);
  border-radius: var(--r-l);
  overflow: hidden;
}

.page-about .about-flow img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

/* ---------- 服务人群 ---------- */
.page-about .about-audience__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: clamp(24px, 4vw, 44px);
}

.page-about .aud-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 26px 24px 28px;
  border: 1px solid var(--line);
  border-radius: var(--r-m);
  background: linear-gradient(168deg, rgba(17, 21, 36, .95), rgba(7, 10, 20, .62));
}

.page-about .aud-tag {
  align-self: flex-start;
  padding: 5px 13px;
  border-radius: var(--pill);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  border: 1px solid currentColor;
}

.page-about .aud-tag--gold { color: var(--gold); }
.page-about .aud-tag--cyan { color: var(--cyan); }
.page-about .aud-tag--violet { color: var(--violet); }

.page-about .aud-card h3 {
  margin: 0;
  font-size: 18px;
  line-height: 1.45;
  color: var(--paper);
}

.page-about .aud-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 协作与荣誉 ---------- */
.page-about .about-trust .headline {
  margin-bottom: 14px;
}

.page-about .about-trust__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
  margin-top: clamp(24px, 4vw, 44px);
}

.page-about .about-trust__col {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-about .about-quote {
  margin: 0;
  padding: 22px 24px;
  border-left: 3px solid var(--clay);
  border-radius: 0 var(--r-m) var(--r-m) 0;
  background: rgba(201, 123, 85, .09);
  color: var(--paper);
  font-size: 17px;
  line-height: 1.8;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-stat {
  padding: 20px 18px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-m);
  background: var(--about-panel);
}

.page-about .about-stat strong {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(21px, 2.6vw, 30px);
  font-weight: 500;
  letter-spacing: .01em;
  color: var(--gold);
}

.page-about .about-stat strong small {
  font-size: .58em;
  letter-spacing: .08em;
  color: var(--mist);
}

.page-about .about-stat span {
  display: block;
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--mist);
}

/* ---------- 下一步 ---------- */
.page-about .about-next__inner {
  position: relative;
  overflow: hidden;
  display: grid;
  gap: 18px;
  padding: clamp(28px, 5vw, 54px);
  border: 1px solid rgba(228, 192, 112, .28);
  border-radius: var(--r-l);
  background:
    linear-gradient(122deg, rgba(228, 192, 112, .13) 0%, rgba(73, 214, 232, .06) 55%, rgba(164, 104, 255, .11) 100%);
}

.page-about .about-next__inner .headline {
  margin: 0;
}

.page-about .about-next__inner .prose {
  margin: 0;
}

.page-about .about-next__inner .prose a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(228, 192, 112, .45);
}

.page-about .about-next__inner .prose a:hover,
.page-about .about-next__inner .prose a:focus-visible {
  border-bottom-color: var(--gold);
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 4px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-about .about-audience__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .brand-timeline {
    grid-template-columns: minmax(140px, 1fr) minmax(0, 7fr);
    gap: clamp(36px, 5vw, 60px);
    align-items: start;
  }

  .page-about .tl-index {
    position: sticky;
    top: 96px;
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .tl-year {
    justify-content: space-between;
    width: 100%;
    padding: 11px 14px;
    border-radius: var(--r-s);
    border-color: transparent;
    border-left: 2px solid var(--line);
    background: transparent;
  }

  .page-about .tl-year:hover,
  .page-about .tl-year:focus-visible {
    border-left-color: var(--gold);
    background: var(--plate);
    transform: none;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(34px, 5vw, 64px);
  }

  .page-about .about-flow-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-trust__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    align-items: start;
  }
}

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

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

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-year,
  .page-about .tl-node::before,
  .page-about .tl-title,
  .page-about .role-card {
    transition: none;
  }

  .page-about .tl-year:hover,
  .page-about .role-card:hover {
    transform: none;
  }
}