.page-about {
  --about-paper: #F4EBD9;
  --about-paper-deep: #E7D9BE;
  --about-ink: #1D1712;
  --about-ink-soft: #4A3E33;
  --about-node: #C9552E;
  --about-hair: rgba(63, 224, 206, 0.18);
  --about-hair-soft: rgba(63, 224, 206, 0.08);
  background: var(--hz-grad-night);
  color: var(--hz-cream);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  max-width: var(--hz-maxw);
  margin: 0 auto;
  padding: clamp(36px, 5vw, 72px) var(--hz-gutter) clamp(28px, 4vw, 52px);
}

.page-about .about-crumbs__sep {
  display: inline-block;
  margin: 0 8px;
  color: var(--hz-cyan-deep);
}

.page-about .about-hero__top {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-top: clamp(20px, 3vw, 34px);
}

.page-about .about-hero__ghost {
  font-family: var(--hz-font-mono);
  font-size: clamp(26px, 6vw, 84px);
  line-height: 0.9;
  letter-spacing: -0.02em;
  color: rgba(63, 224, 206, 0.14);
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
}

.page-about .about-hero__lead {
  max-width: 48ch;
  margin: 18px 0 0;
  font-size: clamp(16px, 1.8vw, 18px);
  line-height: 1.85;
  color: var(--hz-mist);
}

.page-about .about-hero__chips {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 0;
  padding: 0;
}

/* ---------- 为什么叫纵横 ---------- */
.page-about .about-band {
  max-width: var(--hz-maxw);
  margin: clamp(20px, 3vw, 40px) auto 0;
  padding: 0 var(--hz-gutter);
}

.page-about .about-meaning {
  position: relative;
  background: var(--about-paper);
  color: var(--about-ink);
  border-radius: var(--hz-radius-lg);
  padding: clamp(24px, 4vw, 52px);
  box-shadow: var(--hz-shadow);
  overflow: hidden;
}

.page-about .about-meaning::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background-image:
    linear-gradient(rgba(29, 23, 18, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(29, 23, 18, 0.05) 1px, transparent 1px);
  background-size: 30px 30px;
  pointer-events: none;
}

.page-about .about-meaning > * {
  position: relative;
}

.page-about .about-meaning .hz-eyebrow {
  color: var(--about-node);
}

.page-about .about-h2 {
  margin: 8px 0 0;
  font-family: var(--hz-font-sans);
  font-weight: 900;
  letter-spacing: -0.01em;
  font-size: clamp(24px, 3.4vw, 36px);
  line-height: 1.22;
  color: var(--hz-cream);
}

.page-about .about-meaning .about-h2 {
  color: var(--about-ink);
}

.page-about .about-axis-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: clamp(20px, 3vw, 32px);
}

.page-about .about-axis {
  position: relative;
  padding: 20px 20px 18px;
  border-radius: var(--hz-radius-md);
  background: rgba(29, 23, 18, 0.045);
  border: 1px solid rgba(29, 23, 18, 0.12);
  overflow: hidden;
}

.page-about .about-axis h3 {
  margin: 0 0 8px;
  font-size: clamp(16px, 1.9vw, 19px);
  line-height: 1.4;
  font-weight: 800;
  color: var(--about-ink);
}

.page-about .about-axis p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-ink-soft);
  max-width: 40ch;
}

.page-about .about-axis__char {
  position: absolute;
  top: 2px;
  right: 12px;
  font-size: 62px;
  line-height: 1;
  font-weight: 900;
  color: rgba(201, 85, 46, 0.14);
  pointer-events: none;
}

.page-about .about-axis--h::after {
  content: "";
  position: absolute;
  left: 20px;
  right: 20px;
  bottom: 0;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--about-node), rgba(201, 85, 46, 0));
}

.page-about .about-axis--v::after {
  content: "";
  position: absolute;
  top: 14px;
  bottom: 14px;
  left: 0;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--about-node), rgba(201, 85, 46, 0));
}

.page-about .about-meaning__note {
  margin: 22px 0 0;
  padding-top: 16px;
  border-top: 1px dashed rgba(29, 23, 18, 0.2);
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.8;
  color: var(--about-ink);
  max-width: 46ch;
}

/* ---------- 双列外壳 ---------- */
.page-about .about-shell {
  max-width: var(--hz-maxw);
  margin: clamp(40px, 6vw, 84px) auto 0;
  padding: 0 var(--hz-gutter);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(32px, 5vw, 56px);
}

.page-about .about-rail,
.page-about .about-flow {
  min-width: 0;
}

.page-about .about-rail__figure {
  margin: 0;
  border-radius: var(--hz-radius-md);
  overflow: hidden;
  border: 1px solid var(--about-hair);
  background: var(--hz-harbor);
}

.page-about .about-rail__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
}

.page-about .about-rail__quote {
  margin: 18px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--hz-amber);
  font-size: 15px;
  line-height: 1.8;
  color: var(--hz-mist);
}

.page-about .about-years {
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-years__title {
  margin: 0 0 10px;
  font-family: var(--hz-font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--hz-cyan);
}

.page-about .about-years__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .about-years__link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 9px 12px;
  border-radius: var(--hz-radius-sm);
  border-left: 2px solid transparent;
  color: var(--hz-mist);
  text-decoration: none;
  transition: background-color 0.25s var(--hz-ease), color 0.25s var(--hz-ease), border-color 0.25s var(--hz-ease);
}

.page-about .about-years__link:hover,
.page-about .about-years__link:focus-visible {
  background: var(--about-hair-soft);
  color: var(--hz-cream);
  border-left-color: var(--hz-amber);
}

.page-about .about-years__link[aria-current] {
  background: rgba(63, 224, 206, 0.1);
  color: var(--hz-cream);
  border-left-color: var(--hz-cyan);
}

.page-about .about-years__num {
  font-family: var(--hz-font-mono);
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--hz-cyan);
}

.page-about .about-years__label {
  font-size: 14px;
}

/* ---------- 通用块 ---------- */
.page-about .about-block {
  padding-top: clamp(44px, 6vw, 84px);
}

.page-about .about-flow > .about-block:first-child {
  padding-top: 0;
}

.page-about .about-lead {
  margin: 14px 0 0;
  max-width: 52ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--hz-mist);
}

/* ---------- 时间轴 ---------- */
.page-about .about-tl {
  list-style: none;
  margin: clamp(24px, 3vw, 36px) 0 0;
  padding: 0 0 0 26px;
  position: relative;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--hz-cyan) 0%, var(--hz-cyan-deep) 52%, rgba(27, 143, 138, 0) 100%);
}

.page-about .about-tl__item {
  position: relative;
  padding-bottom: clamp(22px, 3vw, 36px);
  scroll-margin-top: calc(var(--hz-bar-h) + 28px);
}

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

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 16px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--hz-abyss);
  border: 2px solid var(--hz-cyan);
  box-shadow: 0 0 0 4px rgba(63, 224, 206, 0.12);
}

.page-about .about-tl__card {
  border-radius: var(--hz-radius-md);
  border: 1px solid var(--about-hair);
  background: var(--hz-grad-card);
  padding: clamp(18px, 2.4vw, 26px);
  transition: border-color 0.3s var(--hz-ease), transform 0.3s var(--hz-ease);
}

.page-about .about-tl__card:hover {
  border-color: rgba(63, 224, 206, 0.42);
  transform: translateY(-2px);
}

.page-about .about-tl__card--now {
  border-color: rgba(245, 169, 63, 0.42);
  background: linear-gradient(155deg, rgba(18, 58, 84, 0.94) 0%, rgba(10, 31, 49, 0.96) 60%, rgba(63, 224, 206, 0.1) 100%);
}

.page-about .about-tl__year {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 10px;
  font-family: var(--hz-font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--hz-amber);
}

.page-about .about-tl__year::before {
  content: "";
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--about-node);
}

.page-about .about-tl__card h3 {
  margin: 0 0 8px;
  font-size: clamp(17px, 1.9vw, 20px);
  line-height: 1.45;
  font-weight: 800;
  color: var(--hz-cream);
}

.page-about .about-tl__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--hz-mist);
  max-width: 52ch;
}

.page-about .about-tl__figure {
  margin: 18px 0 0;
  border-radius: var(--hz-radius-sm);
  overflow: hidden;
  border: 1px solid var(--about-hair);
}

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

/* ---------- 团队分工 ---------- */
.page-about .about-team-bar {
  display: grid;
  grid-template-columns: 41fr 12fr 9fr 6fr;
  gap: 3px;
  height: 18px;
  margin: clamp(22px, 3vw, 30px) 0 18px;
}

.page-about .about-team-bar > span {
  display: block;
  min-width: 0;
  border-radius: 999px;
}

.page-about .about-team-bar__a { background: var(--hz-cyan); }
.page-about .about-team-bar__b { background: var(--hz-cyan-deep); }
.page-about .about-team-bar__c { background: var(--hz-amber); }
.page-about .about-team-bar__d { background: var(--about-node); }

.page-about .about-team-legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-team-legend li {
  display: grid;
  grid-template-columns: 10px minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 10px;
  padding: 11px 14px;
  border-radius: var(--hz-radius-sm);
  border: 1px solid var(--about-hair);
  background: var(--about-hair-soft);
  font-size: 14px;
}

.page-about .about-team-legend__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.page-about .about-team-legend__dot--a { background: var(--hz-cyan); }
.page-about .about-team-legend__dot--b { background: var(--hz-cyan-deep); }
.page-about .about-team-legend__dot--c { background: var(--hz-amber); }
.page-about .about-team-legend__dot--d { background: var(--about-node); }

.page-about .about-team-legend__name {
  color: var(--hz-cream);
}

.page-about .about-team-legend__num {
  font-family: var(--hz-font-mono);
  font-size: 13px;
  color: var(--hz-cyan);
}

.page-about .about-team-legend__pct {
  font-family: var(--hz-font-mono);
  font-size: 12px;
  color: var(--hz-mist);
}

/* ---------- 安全链路 ---------- */
.page-about .about-chain {
  list-style: none;
  margin: clamp(22px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
  counter-reset: about-chain;
}

.page-about .about-chain li {
  position: relative;
  padding: 18px 18px 16px;
  border-radius: var(--hz-radius-md);
  border: 1px solid var(--about-hair);
  background: rgba(10, 31, 49, 0.62);
}

.page-about .about-chain__idx {
  display: block;
  margin-bottom: 8px;
  font-family: var(--hz-font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--hz-cyan);
}

.page-about .about-chain li strong {
  display: block;
  margin-bottom: 6px;
  font-size: 15px;
  font-weight: 800;
  color: var(--hz-cream);
}

.page-about .about-chain__desc {
  display: block;
  font-size: 14px;
  line-height: 1.75;
  color: var(--hz-mist);
}

.page-about .about-cert {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-cert li {
  padding: 18px 20px;
  border-radius: var(--hz-radius-md);
  border: 1px solid var(--about-hair);
  background: linear-gradient(155deg, rgba(18, 58, 84, 0.58) 0%, rgba(10, 31, 49, 0.8) 100%);
  transition: border-color 0.3s var(--hz-ease), transform 0.3s var(--hz-ease), box-shadow 0.3s var(--hz-ease);
}

.page-about .about-cert li:hover,
.page-about .about-cert li:focus-within,
.page-about .about-cert li:focus {
  border-color: rgba(245, 169, 63, 0.62);
  transform: translateY(-3px);
  box-shadow: 0 22px 42px -32px #000;
  outline: none;
}

.page-about .about-cert h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 800;
  color: var(--hz-cream);
}

.page-about .about-cert p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--hz-mist);
}

.page-about .about-cert__note {
  display: block;
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px dashed var(--about-hair);
  font-size: 13px;
  line-height: 1.7;
  color: var(--hz-cyan);
  opacity: 0.65;
  transition: opacity 0.3s var(--hz-ease);
}

.page-about .about-cert li:hover .about-cert__note,
.page-about .about-cert li:focus-within .about-cert__note,
.page-about .about-cert li:focus .about-cert__note {
  opacity: 1;
}

/* ---------- 服务网络 ---------- */
.page-about .about-net {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  margin-top: clamp(22px, 3vw, 30px);
}

.page-about .about-net__figure {
  margin: 0;
  border-radius: var(--hz-radius-md);
  overflow: hidden;
  border: 1px solid var(--about-hair);
  background: var(--hz-harbor);
}

.page-about .about-net__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-about .about-net__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-net__list li {
  padding: 13px 16px;
  border-left: 2px solid var(--hz-cyan-deep);
  border-radius: 0 var(--hz-radius-sm) var(--hz-radius-sm) 0;
  background: var(--about-hair-soft);
}

.page-about .about-net__list strong {
  display: block;
  margin-bottom: 4px;
  font-size: 14px;
  font-weight: 800;
  color: var(--hz-cyan);
}

.page-about .about-net__list span {
  display: block;
  font-size: 14px;
  line-height: 1.75;
  color: var(--hz-mist);
}

/* ---------- 合作与荣誉 ---------- */
.page-about .about-partners__panel {
  margin-top: clamp(22px, 3vw, 30px);
  padding: clamp(18px, 3vw, 30px);
  border-radius: var(--hz-radius-lg);
  border: 1px solid var(--about-hair);
  background: var(--hz-grad-card);
}

.page-about .about-partners__note {
  margin: 18px 0 0;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--hz-mist);
}

/* ---------- 尾部指引 ---------- */
.page-about .about-next {
  max-width: var(--hz-maxw);
  margin: clamp(48px, 7vw, 96px) auto 0;
  padding: 0 var(--hz-gutter) clamp(48px, 7vw, 88px);
}

.page-about .about-next__panel {
  padding: clamp(24px, 4vw, 44px);
  border-radius: var(--hz-radius-lg);
  border: 1px solid var(--about-hair);
  background: linear-gradient(135deg, rgba(18, 58, 84, 0.72) 0%, rgba(10, 31, 49, 0.55) 100%);
}

.page-about .about-next__lead {
  margin: 12px 0 0;
  max-width: 52ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--hz-mist);
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .about-axis-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-team-legend {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 18px;
  }
}

@media (min-width: 780px) {
  .page-about .about-chain {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 860px) {
  .page-about .about-net {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-about .about-shell {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    align-items: start;
    gap: clamp(40px, 4vw, 68px);
  }

  .page-about .about-rail__inner {
    position: sticky;
    top: calc(var(--hz-bar-h) + 28px);
  }

  .page-about .about-tl {
    padding-left: 32px;
  }

  .page-about .about-tl__item::before {
    left: -32px;
  }
}

@media (max-width: 599px) {
  .page-about .about-hero__ghost {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tl__card,
  .page-about .about-cert li,
  .page-about .about-years__link,
  .page-about .about-cert__note {
    transition: none;
  }

  .page-about .about-tl__card:hover,
  .page-about .about-cert li:hover,
  .page-about .about-cert li:focus-within {
    transform: none;
  }
}