.page-about {
  --about-shadow: 0 18px 42px -26px rgba(212, 165, 55, .6);
  color: var(--paper);
}

/* ---------- 面包屑 ---------- */
.page-about .about-top { padding-top: clamp(20px, 3vw, 34px); }

.page-about .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--metal);
}

.page-about .breadcrumb-link {
  color: var(--metal);
  text-decoration: none;
  transition: color .28s var(--ease);
}

.page-about .breadcrumb-link:hover { color: var(--gold-hi); }
.page-about .breadcrumb-sep { color: var(--line-strong); }
.page-about .breadcrumb-current { color: var(--paper); }

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 4.5vw, 58px) 0 clamp(46px, 6vw, 82px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -34%;
  right: -14%;
  width: min(620px, 78vw);
  height: min(620px, 78vw);
  background: radial-gradient(circle, rgba(91, 46, 158, .34), rgba(11, 11, 15, 0) 68%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--line-soft), var(--line-strong), transparent 82%);
}

.page-about .hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(28px, 4vw, 48px);
}

.page-about .about-hero h1 {
  margin: 18px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(33px, 5.4vw, 66px);
  line-height: 1.08;
  letter-spacing: -.01em;
}

.page-about .about-hero .lede {
  margin: 20px 0 0;
  max-width: 58ch;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.8;
  color: var(--paper);
  opacity: .86;
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: clamp(24px, 3vw, 34px);
}

.page-about .hero-facts {
  border: 1px solid var(--line);
  background: linear-gradient(155deg, var(--ink-3), var(--ink) 78%);
  padding: clamp(20px, 3vw, 28px);
}

.page-about .hero-facts__title {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--gold);
}

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

.page-about .fact {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 16px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line-soft);
}

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

.page-about .fact-num { font-size: clamp(19px, 2vw, 25px); }

.page-about .fact-label {
  font-size: 13px;
  letter-spacing: .05em;
  color: var(--metal);
}

/* ---------- 悬浮章节索引 ---------- */
.page-about .spy-nav {
  position: sticky;
  top: calc(var(--header-h) + 10px);
  z-index: 15;
  display: flex;
  align-items: center;
  gap: 4px;
  overflow-x: auto;
  margin-bottom: clamp(24px, 4vw, 48px);
  padding: 7px;
  border: 1px solid var(--line-soft);
  background: rgba(11, 11, 15, .84);
  backdrop-filter: blur(8px);
  scrollbar-width: none;
}

.page-about .spy-nav::-webkit-scrollbar { display: none; }

.page-about .spy-title {
  flex: 0 0 auto;
  margin: 0;
  padding: 0 12px 0 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .spy-link {
  flex: 0 0 auto;
  padding: 8px 13px;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--metal);
  text-decoration: none;
  border: 1px solid transparent;
  transition: color .28s var(--ease), background-color .28s var(--ease), border-color .28s var(--ease);
}

.page-about .spy-link:hover {
  color: var(--gold-hi);
  border-color: var(--line);
}

.page-about .spy-link[aria-current="true"] {
  color: var(--ink);
  background: var(--gold);
  border-color: var(--gold);
}

/* ---------- 通用区块头部 ---------- */
.page-about .about-head {
  display: grid;
  gap: 26px;
  margin-bottom: clamp(28px, 4vw, 52px);
}

.page-about .side-note {
  margin: 0;
  padding-left: 16px;
  border-left: 2px solid var(--gold);
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper);
  opacity: .78;
}

.page-about .media {
  margin: 0;
  border: 1px solid var(--line-soft);
  background: var(--ink-3);
}

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

.page-about .media-caption {
  padding: 12px 16px;
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: .04em;
  color: var(--metal);
  border-top: 1px solid var(--line-soft);
}

/* ---------- 时间轴 ---------- */
.page-about .tl-figure { margin: 0; }

.page-about .tl-list {
  position: relative;
  margin: 0;
  padding: 0 0 0 36px;
  list-style: none;
}

.page-about .tl-list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--line-soft), var(--line-strong) 18%, var(--line-strong) 82%, var(--line-soft));
}

.page-about .tl-item {
  position: relative;
  padding-bottom: clamp(30px, 4vw, 52px);
}

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

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 5px rgba(212, 165, 55, .12);
  transition: background-color .28s var(--ease), box-shadow .28s var(--ease);
}

.page-about .tl-item.reveal-init::before {
  background: rgba(212, 165, 55, .22);
  box-shadow: 0 0 0 5px rgba(212, 165, 55, .04);
}

.page-about .tl-year {
  display: inline-block;
  font-size: clamp(20px, 2.2vw, 26px);
  letter-spacing: .04em;
  color: var(--gold-hi);
}

.page-about .tl-note {
  margin: 8px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: .04em;
  color: var(--metal);
}

.page-about .tl-body {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
}

.page-about .tl-idx {
  display: block;
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--gold);
}

.page-about .tl-title {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2vw, 24px);
  line-height: 1.35;
  color: var(--paper);
}

.page-about .tl-text {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--paper);
  opacity: .8;
}

/* ---------- 覆盖与节点 ---------- */
.page-about .cover-figure { margin-bottom: clamp(24px, 3vw, 36px); }

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

.page-about .node-card {
  padding: 18px 18px 16px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--ink-3), var(--ink-2));
  transition: transform .28s var(--ease), border-color .28s var(--ease), box-shadow .28s var(--ease);
}

.page-about .node-card:hover {
  transform: translateY(-6px);
  border-color: var(--line-strong);
  box-shadow: var(--about-shadow);
}

.page-about .node-top {
  display: flex;
  align-items: center;
  gap: 9px;
}

.page-about .node-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  color: var(--paper);
}

.page-about .node-region {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--gold);
}

.page-about .node-tip {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--metal);
  transition: color .28s var(--ease);
}

.page-about .node-card:hover .node-tip { color: var(--cyan); }

.page-about .node-status {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
  font-size: 14px;
  letter-spacing: .04em;
  color: var(--metal);
}

/* ---------- 团队与协作 ---------- */
.page-about .team-rows { border-top: 1px solid var(--line-soft); }

.page-about .team-row {
  display: grid;
  gap: 10px;
  padding: clamp(18px, 2.4vw, 26px) 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .team-role {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .team-role .mono { font-size: 14px; }

.page-about .team-desc {
  margin: 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--paper);
  opacity: .8;
}

/* ---------- 服务标准 ---------- */
.page-about .std-grid {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
}

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

.page-about .std-list {
  display: grid;
  gap: 14px;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .std-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px;
}

.page-about .std-no {
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--gold);
}

.page-about .std-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  color: var(--paper);
}

.page-about .std-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper);
  opacity: .8;
}

.page-about .std-year {
  align-self: flex-start;
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  text-decoration: none;
}

/* ---------- 使用画像 ---------- */
.page-about .portrait-grid {
  display: grid;
  gap: clamp(26px, 4vw, 56px);
  align-items: start;
}

.page-about .stat-stack {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .stat {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px 20px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .stat-num {
  font-size: clamp(28px, 5vw, 46px);
  letter-spacing: -.01em;
  color: var(--gold-hi);
}

.page-about .stat-label {
  max-width: 20ch;
  font-size: 13px;
  line-height: 1.7;
  letter-spacing: .04em;
  color: var(--metal);
}

.page-about .portrait-note {
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--cyan);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--paper);
  opacity: .85;
}

.page-about .portrait-note a {
  color: var(--gold-hi);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  transition: color .28s var(--ease), border-color .28s var(--ease);
}

.page-about .portrait-note a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 收束 ---------- */
.page-about .cta-grid {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
}

.page-about .cta-links {
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .cta-link {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px 24px;
  padding: 18px 20px;
  background: var(--ink);
  text-decoration: none;
  transition: background-color .28s var(--ease), padding-left .28s var(--ease);
}

.page-about .cta-link:hover {
  background: var(--ink-3);
  padding-left: 28px;
}

.page-about .cta-link__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  color: var(--gold-hi);
}

.page-about .cta-link__desc {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--metal);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .node-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }

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

  .page-about .team-row { grid-template-columns: minmax(0, 34fr) minmax(0, 66fr); gap: 32px; align-items: start; }

  .page-about .cta-link { flex-wrap: nowrap; }
}

@media (min-width: 900px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 1.62fr) minmax(0, 1fr);
    align-items: end;
  }

  .page-about .about-head {
    grid-template-columns: minmax(0, 1.62fr) minmax(0, 1fr);
    gap: 56px;
    align-items: end;
  }

  .page-about .about-head--rev { grid-template-columns: minmax(0, 1fr) minmax(0, 1.62fr); }
  .page-about .about-head--rev .head-main { order: 2; }
  .page-about .about-head--rev .head-side { order: 1; }

  .page-about .tl-list { padding-left: 0; }
  .page-about .tl-list::before { left: 5px; }

  .page-about .tl-item {
    display: grid;
    grid-template-columns: minmax(0, 32fr) minmax(0, 68fr);
    gap: clamp(24px, 4vw, 56px);
    padding-left: 40px;
  }

  .page-about .tl-item::before { left: 0; top: 8px; }

  .page-about .tl-body {
    margin-top: 0;
    padding-top: 0;
    border-top: 0;
  }

  .page-about .node-grid { grid-template-columns: repeat(5, minmax(0, 1fr)); }

  .page-about .std-grid { grid-template-columns: minmax(0, 38fr) minmax(0, 62fr); align-items: start; }

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

  .page-about .cta-grid { grid-template-columns: minmax(0, 38fr) minmax(0, 62fr); align-items: start; }
}

@media (min-width: 1100px) {
  .page-about .portrait-grid { grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .node-card:hover,
  .page-about .cta-link:hover { transform: none; }

  .page-about .node-card,
  .page-about .cta-link,
  .page-about .tl-item::before,
  .page-about .spy-link { transition-duration: .01ms; }
}