.page-about {
  --about-narrow: 720px;
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--ink);
  padding: calc(var(--header-h) + 56px) 0 60px;
}

.page-about .about-hero__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 40%;
  opacity: 0.4;
  z-index: -3;
}

.page-about .about-hero__veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(158deg, rgba(11, 23, 38, 0.95) 0%, rgba(11, 23, 38, 0.78) 42%, rgba(20, 38, 59, 0.62) 100%);
  z-index: -2;
}

.page-about .about-hero__slash {
  position: absolute;
  right: -18%;
  bottom: -46%;
  width: 78%;
  height: 130%;
  background: linear-gradient(180deg, rgba(226, 59, 46, 0.72), rgba(226, 59, 46, 0));
  transform: rotate(28deg);
  transform-origin: 100% 100%;
  opacity: 0.42;
  z-index: -1;
  pointer-events: none;
}

.page-about .about-hero__inner {
  max-width: var(--about-narrow);
}

.page-about .about-hero__crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--mist);
  margin-bottom: 22px;
}

.page-about .about-hero__crumbs a {
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid rgba(245, 241, 232, 0.35);
  padding-bottom: 1px;
}

.page-about .about-hero__crumbs a:hover {
  border-bottom-color: var(--yellow);
  color: var(--yellow);
}

.page-about .about-hero__eyebrow {
  color: var(--yellow);
  letter-spacing: 0.18em;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-size: clamp(30px, 7.4vw, 64px);
  line-height: 1.12;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--paper);
  font-stretch: condensed;
}

.page-about .about-hero__lead {
  margin: 20px 0 0;
  font-size: clamp(15px, 3.6vw, 18px);
  line-height: 1.75;
  color: rgba(245, 241, 232, 0.82);
  max-width: 640px;
}

.page-about .about-hero__meta {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
}

.page-about .about-hero__meta li {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 8px 16px;
  border: 1px solid rgba(245, 241, 232, 0.24);
  border-radius: 999px;
  font-size: 13px;
  color: rgba(245, 241, 232, 0.86);
  background: rgba(11, 23, 38, 0.4);
}

.page-about .about-hero__meta .mono {
  color: var(--jade);
  font-style: italic;
  font-weight: 700;
  font-size: 15px;
}

/* ---------- 主栅格 ---------- */
.page-about .about-layout {
  padding-top: 48px;
  padding-bottom: 64px;
}

.page-about .about-rail {
  display: none;
}

.page-about .about-col {
  min-width: 0;
}

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  padding: 40px 0 8px;
}

.page-about .about-section__title {
  margin: 12px 0 18px;
  font-size: clamp(23px, 5.2vw, 40px);
  line-height: 1.22;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-lead {
  font-size: clamp(15px, 3.5vw, 17px);
  line-height: 1.78;
  color: rgba(245, 241, 232, 0.78);
  max-width: 62ch;
}

.page-about .about-section p {
  line-height: 1.78;
  max-width: 64ch;
}

.page-about .about-subhead {
  margin: 26px 0 8px;
  font-size: clamp(17px, 3.8vw, 21px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-inline-link {
  margin-top: 24px;
  font-size: 14px;
  color: var(--mist);
}

.page-about .about-inline-link a {
  color: var(--jade);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 169, 140, 0.45);
}

.page-about .about-inline-link a:hover {
  color: var(--yellow);
  border-bottom-color: var(--yellow);
}

.page-about .about-inline-link--light {
  color: rgba(245, 241, 232, 0.7);
}

/* ---------- 使用场景索引 ---------- */
.page-about .about-scenes {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-scenes .index-item {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 14px;
  padding: 18px 0 4px;
  border-top: 1px solid var(--line);
}

.page-about .about-scenes .index-num {
  font-style: italic;
  font-weight: 700;
  font-size: 15px;
  color: var(--yellow);
  padding-top: 2px;
}

.page-about .about-scenes h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-scenes p {
  margin: 0;
  font-size: 14.5px;
  color: rgba(245, 241, 232, 0.72);
}

/* ---------- 时间线 ---------- */
.page-about .about-journey {
  margin-top: 56px;
  border-radius: var(--radius-lg);
  padding: 40px 20px 48px;
}

.page-about .about-timeline {
  position: relative;
  margin-top: 30px;
  padding-left: 26px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--jade), rgba(47, 169, 140, 0.12) 70%, rgba(242, 178, 27, 0.5));
  border-radius: 2px;
}

.page-about .about-node {
  position: relative;
  margin-bottom: 6px;
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 24px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--jade);
  box-shadow: 0 0 0 4px rgba(47, 169, 140, 0.15);
}

.page-about .about-node--current::before {
  background: var(--yellow);
  box-shadow: 0 0 0 4px rgba(242, 178, 27, 0.18);
}

.page-about .about-node__details {
  border-bottom: 1px solid var(--line);
}

.page-about .about-node__details > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 14px;
  padding: 16px 0;
}

.page-about .about-node__details > summary::-webkit-details-marker {
  display: none;
}

.page-about .about-node__details > summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--mist);
  transition: color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .about-node__details[open] > summary::after {
  content: "–";
  color: var(--jade);
}

.page-about .about-node__details > summary:hover::after {
  color: var(--yellow);
}

.page-about .about-node__year {
  font-style: italic;
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--yellow);
  text-transform: uppercase;
  white-space: nowrap;
}

.page-about .about-node__title {
  margin: 0;
  font-size: clamp(16px, 3.8vw, 19px);
  font-weight: 700;
  color: var(--paper);
  letter-spacing: -0.01em;
}

.page-about .about-node__body {
  padding: 0 0 20px;
  max-width: 62ch;
}

.page-about .about-node__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(245, 241, 232, 0.74);
}

.page-about .about-journey__figure {
  margin: 22px 0 26px;
  border-radius: var(--radius-md);
  overflow: hidden;
}

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

.page-about .image-frame__cap {
  display: block;
  padding: 10px 14px;
  font-size: 12.5px;
  color: rgba(245, 241, 232, 0.6);
  background: rgba(11, 23, 38, 0.5);
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-coverage {
  margin-top: 56px;
  border-radius: var(--radius-lg);
  padding: 40px 20px 48px;
}

.page-about .about-stats {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--paper-line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .about-stat {
  background: var(--ink);
  padding: 20px 16px 22px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-stat__num {
  font-style: italic;
  font-weight: 800;
  font-size: clamp(26px, 7vw, 42px);
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--yellow);
}

.page-about .about-stat:nth-child(2) .about-stat__num {
  color: var(--jade);
}

.page-about .about-stat:nth-child(3) .about-stat__num {
  color: var(--paper);
}

.page-about .about-stat:nth-child(4) .about-stat__num {
  color: var(--clay);
}

.page-about .about-stat__key {
  font-size: 14px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-stat__note {
  font-size: 12.5px;
  line-height: 1.6;
  color: rgba(11, 23, 38, 0.62);
}

.page-about .about-coverage__split {
  margin-top: 34px;
  display: grid;
  gap: 26px;
}

.page-about .about-coverage__text p {
  font-size: 14.5px;
  line-height: 1.8;
}

.page-about .about-coverage__figure {
  margin: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
}

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

/* ---------- 维护团队 ---------- */
.page-about .about-team {
  margin-top: 20px;
}

.page-about .about-team__grid {
  margin-top: 28px;
  display: grid;
  gap: 18px;
}

.page-about .about-team__card {
  padding: 22px 20px;
  border-radius: var(--radius-md);
  background: rgba(20, 38, 59, 0.72);
  border: 1px solid var(--line);
}

.page-about .about-team__card h3 {
  margin: 14px 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-team__card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(245, 241, 232, 0.74);
}

.page-about .about-quote {
  margin: 30px 0 0;
  padding: 20px 22px;
  border-left: 3px solid var(--clay);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: rgba(194, 102, 74, 0.09);
  font-size: 15px;
  line-height: 1.8;
  color: rgba(245, 241, 232, 0.86);
}

.page-about .about-quote__cite {
  display: block;
  margin-top: 10px;
  font-size: 12.5px;
  font-style: normal;
  color: var(--mist);
}

/* ---------- 联系 ---------- */
.page-about .about-region {
  margin-top: 56px;
  border-radius: var(--radius-lg);
  padding: 40px 20px 44px;
}

.page-about .about-region__panel {
  margin-top: 28px;
  padding: 24px 20px;
}

.page-about .about-contact {
  margin: 0;
  display: grid;
  gap: 0;
}

.page-about .about-contact__row {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-contact__row:first-child {
  padding-top: 0;
}

.page-about .about-contact__row dt {
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
  font-family: var(--font-mono);
}

.page-about .about-contact__row dd {
  margin: 0;
  font-size: 15.5px;
  color: var(--paper);
  word-break: break-word;
}

.page-about .about-contact__row dd .mono {
  font-style: normal;
}

.page-about .about-region__note {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(245, 241, 232, 0.7);
}

.page-about .about-region__actions {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-region__legal {
  margin: 26px 0 0;
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  margin-top: 56px;
  padding: 36px 20px 40px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(226, 59, 46, 0.9), rgba(194, 102, 74, 0.85) 62%, rgba(11, 23, 38, 0.9));
  position: relative;
  overflow: hidden;
}

.page-about .about-cta::after {
  content: "";
  position: absolute;
  right: -30%;
  top: -60%;
  width: 60%;
  height: 220%;
  background: rgba(242, 178, 27, 0.22);
  transform: rotate(26deg);
  pointer-events: none;
}

.page-about .about-cta__title {
  position: relative;
  margin: 0;
  font-size: clamp(21px, 5vw, 32px);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-cta__text {
  position: relative;
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(245, 241, 232, 0.88);
  max-width: 48ch;
}

.page-about .about-cta__actions {
  position: relative;
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 平板 ---------- */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding: calc(var(--header-h) + 76px) 0 84px;
  }

  .page-about .about-section {
    padding: 52px 0 12px;
  }

  .page-about .about-journey,
  .page-about .about-coverage,
  .page-about .about-region,
  .page-about .about-cta {
    padding-left: 34px;
    padding-right: 34px;
  }

  .page-about .about-scenes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 30px;
  }

  .page-about .about-team__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .about-coverage__split {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: start;
    gap: 34px;
  }

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

/* ---------- 桌面：侧边轨道 ---------- */
@media (min-width: 1024px) {
  .page-about .about-layout {
    padding-top: 72px;
    padding-bottom: 88px;
  }

  .page-about .about-rail {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 32px);
    align-self: start;
    padding-right: 24px;
    border-right: 1px solid var(--line);
  }

  .page-about .about-rail .rail-title {
    margin: 0 0 18px;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--mist);
  }

  .page-about .about-rail .rail-index {
    display: flex;
    flex-direction: column;
    gap: 2px;
  }

  .page-about .about-rail .rail-index a {
    display: block;
    padding: 9px 0 9px 14px;
    font-size: 14px;
    color: rgba(245, 241, 232, 0.66);
    text-decoration: none;
    border-left: 2px solid transparent;
    transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
  }

  .page-about .about-rail .rail-index a:hover {
    color: var(--paper);
  }

  .page-about .about-rail .rail-index a.is-active {
    color: var(--jade);
    border-left-color: var(--jade);
    font-weight: 700;
  }

  .page-about .about-rail-note {
    writing-mode: vertical-rl;
    margin: 34px 0 0;
    font-size: 12px;
    letter-spacing: 0.2em;
    color: var(--mist);
    max-height: 220px;
  }

  .page-about .about-col {
    padding-left: 40px;
  }

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

  .page-about .about-stat {
    padding: 26px 22px 28px;
  }

  .page-about .about-hero__title {
    max-width: 15ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-node__details > summary::after {
    transition: none;
  }
}
</｜｜DSML｜｜ parameter>
</invoke>
</invoke>
</parameter>