.page-about {
  --about-radius: 6px;
  --about-pad: clamp(16px, 4vw, 22px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(22px, 4vw, 46px) 0 clamp(26px, 5vw, 46px);
}

.page-about .breadcrumbs {
  font-size: 13px;
  margin-bottom: clamp(20px, 4vw, 34px);
}

.page-about .about-hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 5vw, 48px);
  align-items: center;
}

.page-about .about-hero__eyebrow {
  display: inline-block;
  margin: 0;
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cyan);
  background: rgba(37, 225, 214, .07);
  border: 1px solid var(--line);
  border-radius: 2px;
}

.page-about .about-hero h1 {
  margin: 22px 0 0;
  font-family: var(--font-title);
  font-weight: 900;
  font-size: clamp(34px, 8.4vw, 84px);
  line-height: 1.06;
  letter-spacing: -.015em;
  color: var(--white);
  text-wrap: balance;
}

.page-about .about-hero__lead {
  margin: 22px 0 0;
  max-width: 46ch;
  font-size: clamp(16px, 1.4vw, 18px);
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero__media {
  position: relative;
  margin: 0;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  overflow: hidden;
  box-shadow: -14px 14px 0 rgba(59, 42, 102, .38);
}

.page-about .about-hero__shot {
  position: relative;
  overflow: hidden;
}

.page-about .about-hero__shot::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(120% 90% at 82% 8%, rgba(122, 60, 255, .38), transparent 62%),
    radial-gradient(90% 80% at 8% 96%, rgba(37, 225, 214, .24), transparent 60%);
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-hero__caption {
  padding: 12px 16px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
  border-top: 1px solid var(--line);
  background: rgba(10, 6, 20, .72);
}

/* ---------- 分类 ---------- */
.page-about .about-cats-head {
  max-width: 720px;
}

.page-about .about-cats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
  gap: 12px;
  margin-top: clamp(28px, 4vw, 42px);
}

.page-about .cat-card {
  position: relative;
  padding: 18px 16px 16px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  transition: border-color .2s var(--ease), transform .2s var(--ease), box-shadow .2s var(--ease);
}

.page-about .cat-card:hover {
  border-color: var(--cyan);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.page-about .cat-card__idx {
  display: block;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--violet);
}

.page-about .cat-card h3 {
  margin: 10px 0 6px;
  font-size: 18px;
  font-weight: 600;
  color: var(--white);
}

.page-about .cat-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline-head {
  max-width: 640px;
}

.page-about .timeline {
  position: relative;
  list-style: none;
  margin: clamp(30px, 5vw, 48px) 0 0;
  padding: 0;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 30px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--violet) 0%, var(--cyan) 58%, rgba(59, 42, 102, .25) 100%);
}

.page-about .tl-item {
  position: relative;
  padding-left: 84px;
  margin-bottom: 22px;
}

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

.page-about .tl-node {
  position: absolute;
  left: 0;
  top: 20px;
  width: 62px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .05em;
  color: var(--ink);
  background: var(--neon);
  border-radius: 4px;
  box-shadow: 0 0 0 4px var(--ink);
  transition: background .18s var(--ease), color .18s var(--ease), box-shadow .18s var(--ease);
}

.page-about .tl-item:hover .tl-node,
.page-about .tl-item:focus-within .tl-node {
  background: var(--violet);
  color: var(--white);
  box-shadow: 0 0 0 4px var(--ink), 0 0 20px rgba(122, 60, 255, .65);
}

.page-about .tl-card {
  position: relative;
  padding: 20px 18px 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  transition: border-color .18s var(--ease);
}

.page-about .tl-card::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  right: -1px;
  height: 3px;
  border-radius: var(--about-radius) var(--about-radius) 0 0;
  background: var(--grad);
}

.page-about .tl-item:hover .tl-card,
.page-about .tl-item:focus-within .tl-card {
  border-color: var(--cyan);
}

.page-about .tl-card h3 {
  margin: 0 0 8px;
  font-size: clamp(19px, 2.3vw, 23px);
  font-weight: 700;
  color: var(--white);
}

.page-about .tl-card p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 内容来源 ---------- */
.page-about .about-source__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 44px);
  align-items: start;
}

.page-about .about-source__media {
  margin: 0;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  overflow: hidden;
  box-shadow: 14px 14px 0 rgba(59, 42, 102, .38);
}

.page-about .about-source__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-source__text p {
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--muted);
  margin: 0 0 20px;
}

.page-about .source-facts {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  overflow: hidden;
}

.page-about .source-facts li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 16px;
  background: var(--panel);
}

.page-about .source-facts__num {
  flex: 0 0 auto;
  font-size: 22px;
  color: var(--neon);
}

.page-about .source-facts__label {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 配置 ---------- */
.page-about .about-spec .section__lead {
  max-width: 680px;
}

.page-about .spec-tiers {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: clamp(28px, 4vw, 40px);
}

.page-about .spec-tier {
  position: relative;
  padding: 22px 20px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  transition: border-color .18s var(--ease), transform .18s var(--ease);
}

.page-about .spec-tier:hover {
  border-color: var(--cyan);
  transform: translateY(-4px);
}

.page-about .spec-tier--mid {
  border-top: 3px solid transparent;
}

.page-about .spec-tier--mid::after {
  content: "";
  position: absolute;
  top: -3px;
  left: -1px;
  right: -1px;
  height: 3px;
  border-radius: var(--about-radius) var(--about-radius) 0 0;
  background: var(--grad);
}

.page-about .spec-tier__name {
  margin: 0 0 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--white);
}

.page-about .spec-tier__spec {
  display: inline-block;
  margin: 0 0 14px;
  padding: 6px 12px;
  font-size: 13px;
  color: var(--ink);
  background: var(--neon);
  border-radius: 3px;
}

.page-about .spec-tier__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .spec-notes {
  margin-top: 24px;
  padding: 20px 20px 18px;
  background: rgba(22, 12, 43, .7);
  border-left: 3px solid var(--cyan);
  border-radius: 0 var(--about-radius) var(--about-radius) 0;
}

.page-about .spec-notes p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 团队 ---------- */
.page-about .about-team .grid__main p {
  margin: 0;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .team-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: clamp(28px, 4vw, 40px);
}

.page-about .team-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  transition: border-color .18s var(--ease);
}

.page-about .team-card:hover,
.page-about .team-card[open] {
  border-color: var(--cyan);
}

.page-about .team-card summary {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 18px;
  cursor: pointer;
  list-style: none;
}

.page-about .team-card summary::-webkit-details-marker {
  display: none;
}

.page-about .team-card__dot {
  width: 9px;
  height: 9px;
  border-radius: 2px;
  background: var(--violet);
  flex: 0 0 auto;
  transition: background .18s var(--ease);
}

.page-about .team-card[open] .team-card__dot {
  background: var(--cyan);
}

.page-about .team-card__name {
  font-size: 16px;
  font-weight: 600;
  color: var(--white);
}

.page-about .team-card__hint {
  margin-left: auto;
  padding: 3px 10px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  transition: background .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}

.page-about .team-card[open] .team-card__hint {
  color: var(--ink);
  background: var(--neon);
  border-color: var(--neon);
}

.page-about .team-card__body {
  padding: 0 18px 18px 16px;
  border-left: 3px solid transparent;
  transition: border-color .18s var(--ease);
}

.page-about .team-card[open] .team-card__body {
  border-left-color: var(--cyan);
}

.page-about .team-card__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .team-rhythm {
  margin-top: 22px;
  padding: 20px;
  background: var(--teal);
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
}

.page-about .team-rhythm p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: #BFD8DC;
}

.page-about .about-team__media {
  margin: 28px 0 0;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  overflow: hidden;
}

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

/* ---------- 数字 ---------- */
.page-about .proof-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(28px, 4vw, 40px);
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  overflow: hidden;
}

.page-about .proof-stats .stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 22px 18px;
  background: var(--panel);
}

.page-about .proof-stats .stat__value {
  font-family: var(--font-mono);
  font-size: clamp(24px, 5vw, 34px);
  font-weight: 600;
  letter-spacing: -.02em;
  color: var(--white);
}

.page-about .proof-stats .stat__key {
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted);
}

.page-about .proof-note {
  margin: 22px 0 0;
  max-width: 640px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 荣誉带 ---------- */
.page-about .about-honor {
  margin-top: clamp(34px, 6vw, 64px);
  padding: clamp(28px, 4vw, 44px) 0;
  background: var(--teal);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-honor__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 24px;
}

.page-about .about-honor__badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  background: var(--neon);
  border-radius: 4px;
  transition: background .18s var(--ease), color .18s var(--ease);
}

.page-about .about-honor__badge:hover {
  background: var(--rose);
  color: var(--white);
}

.page-about .about-honor__title {
  margin: 0;
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 700;
  color: var(--white);
}

.page-about .about-honor__sub {
  margin: 6px 0 0;
  font-size: 14px;
  color: #9FC4C9;
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  padding: clamp(38px, 6vw, 72px) 0 clamp(46px, 7vw, 86px);
}

.page-about .about-cta__panel {
  padding: clamp(26px, 4vw, 44px);
}

.page-about .about-cta__title {
  margin: 0 0 14px;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.2;
  color: var(--white);
}

.page-about .about-cta__text {
  margin: 0 0 24px;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.page-about .about-cta__link {
  font-size: 15px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .spec-tiers {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .team-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .about-source__inner {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-about .timeline::before {
    left: 50%;
    transform: translateX(-1px);
  }

  .page-about .tl-item {
    width: 50%;
    padding-left: 0;
    margin-bottom: 34px;
  }

  .page-about .tl-item:nth-child(odd) {
    padding-right: 76px;
    text-align: right;
  }

  .page-about .tl-item:nth-child(even) {
    margin-left: 50%;
    padding-left: 76px;
  }

  .page-about .tl-item:nth-child(odd) .tl-node {
    left: auto;
    right: -31px;
  }

  .page-about .tl-item:nth-child(even) .tl-node {
    left: -31px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero__inner {
    gap: 64px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .cat-card,
  .page-about .spec-tier,
  .page-about .tl-node,
  .page-about .team-card__hint,
  .page-about .about-honor__badge {
    transition: none;
  }
}