.page-about {
  --about-line: rgba(127, 168, 217, 0.18);
  --about-line-soft: rgba(127, 168, 217, 0.09);
  --about-rhythm: clamp(52px, 8vw, 108px);
  padding-top: calc(var(--hh-header-h) + 4px);
  padding-bottom: clamp(48px, 7vw, 96px);
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  max-width: var(--hh-maxw);
  margin: 0 auto;
  padding: 26px 20px 0;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--hh-muted);
}
.page-about .about-crumb a {
  color: var(--hh-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--hh-ease), border-color 0.2s var(--hh-ease);
}
.page-about .about-crumb a:hover {
  color: var(--hh-green);
  border-bottom-color: var(--hh-green);
}
.page-about .about-crumb span[aria-current] {
  color: var(--hh-soft);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  max-width: var(--hh-maxw);
  margin: 0 auto;
  padding: 34px 20px 0;
}
.page-about .about-hero__grid {
  display: grid;
  gap: 22px;
}
.page-about .about-hero__aside {
  border-left: 2px solid var(--hh-green);
  padding-left: 18px;
}
@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    gap: 52px;
    align-items: end;
  }
}

.page-about .about-stats {
  margin-top: 42px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-line);
  border-top: 1px solid var(--about-line);
  border-bottom: 1px solid var(--about-line);
}
@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
.page-about .about-stat {
  background: var(--hh-ink);
  padding: 20px 18px 22px;
  display: grid;
  gap: 7px;
  align-content: start;
  border-top: 2px solid transparent;
  transition: border-color 0.3s var(--hh-ease), background 0.3s var(--hh-ease);
}
.page-about .about-stat:hover {
  border-top-color: var(--hh-green);
  background: var(--hh-stand);
}
.page-about .about-stat .hh-stat__value {
  font-size: clamp(23px, 2.8vw, 30px);
  line-height: 1.15;
  color: var(--hh-text);
}

/* ---------- 首屏下方通栏 ---------- */
.page-about .about-banner {
  position: relative;
  margin: 54px 0 0;
  overflow: hidden;
}
.page-about .about-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11, 18, 32, 0.22) 0%, rgba(11, 18, 32, 0.5) 52%, var(--hh-ink) 100%);
  pointer-events: none;
}
.page-about .about-banner img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  opacity: 0.55;
  filter: saturate(0.6) contrast(1.06);
}

/* ---------- 长文骨架 ---------- */
.page-about .about-body {
  max-width: var(--hh-maxw);
  margin: 0 auto;
  padding: var(--about-rhythm) 20px 0;
  display: grid;
  gap: 44px;
}
@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 62px;
  }
}

/* ---------- 左侧年份索引 ---------- */
.page-about .about-index {
  display: none;
}
@media (min-width: 1000px) {
  .page-about .about-index {
    display: block;
    position: sticky;
    top: calc(var(--hh-header-h) + 30px);
    align-self: start;
  }
}
.page-about .about-index__title {
  margin: 0 0 16px;
  font-family: var(--hh-font-data);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--hh-muted);
}
.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 18px;
  position: relative;
}
.page-about .about-index__list::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: var(--about-line);
}
.page-about .about-index__item {
  position: relative;
  padding: 6px 0;
}
.page-about .about-index__item::before {
  content: "";
  position: absolute;
  left: -18px;
  top: 11px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--hh-ink);
  border: 1px solid var(--hh-line-strong);
  transition: background 0.28s var(--hh-ease), border-color 0.28s var(--hh-ease), box-shadow 0.28s var(--hh-ease);
}
.page-about .about-index__link {
  display: flex;
  align-items: baseline;
  gap: 7px;
  text-decoration: none;
  color: var(--hh-muted);
  transition: color 0.24s var(--hh-ease);
}
.page-about .about-index__link:hover {
  color: var(--hh-soft);
}
.page-about .about-index__year {
  font-family: var(--hh-font-data);
  font-size: 11px;
  letter-spacing: 0.06em;
  white-space: nowrap;
}
.page-about .about-index__label {
  font-size: 12px;
  letter-spacing: 0.02em;
}
.page-about .about-index__link.is-active,
.page-about .about-index__link[aria-current="true"] {
  color: var(--hh-green);
}
.page-about .about-index__item:has(.is-active)::before,
.page-about .about-index__item:has([aria-current="true"])::before {
  background: var(--hh-green);
  border-color: var(--hh-green);
  box-shadow: 0 0 0 4px rgba(140, 255, 60, 0.14);
}

/* ---------- 章节流 ---------- */
.page-about .about-flow {
  display: grid;
  gap: var(--about-rhythm);
  min-width: 0;
}
.page-about .about-era {
  position: relative;
  scroll-margin-top: calc(var(--hh-header-h) + 30px);
}
.page-about .about-era::before {
  content: "";
  display: block;
  height: 1px;
  margin-bottom: 26px;
  background: linear-gradient(90deg, rgba(127, 168, 217, 0.5) 0%, rgba(127, 168, 217, 0.14) 38%, transparent 100%);
}
.page-about .about-era__head {
  display: grid;
  gap: 8px;
}
@media (min-width: 780px) {
  .page-about .about-era__head {
    grid-template-columns: 118px minmax(0, 1fr);
    gap: 30px;
    align-items: baseline;
  }
}
.page-about .about-era__mark {
  margin: 0;
  font-family: var(--hh-font-data);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--hh-cool);
  padding-top: 7px;
  white-space: nowrap;
}
.page-about .about-era__body {
  margin-top: 18px;
}
@media (min-width: 780px) {
  .page-about .about-era__body {
    padding-left: 148px;
  }
}
.page-about .about-era__body p {
  margin: 0 0 16px;
}
.page-about .about-era__body p:last-child {
  margin-bottom: 0;
}
.page-about .about-note {
  margin: 24px 0 0;
  padding: 2px 0 2px 16px;
  border-left: 2px solid var(--hh-orange);
  color: var(--hh-soft);
  font-size: 14px;
  line-height: 1.75;
  max-width: 34em;
}
@media (min-width: 780px) {
  .page-about .about-note {
    margin-left: 148px;
  }
}
.page-about .about-note a {
  color: var(--hh-green);
  text-decoration: none;
  border-bottom: 1px solid rgba(140, 255, 60, 0.4);
}
.page-about .about-note a:hover {
  border-bottom-color: var(--hh-green);
}

/* ---------- 章节配图 ---------- */
.page-about .about-shot {
  margin: 26px 0 0;
}
.page-about .about-shot img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--about-line);
}
.page-about .about-shot figcaption {
  margin-top: 10px;
  font-family: var(--hh-font-data);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--hh-muted);
}
.page-about .about-strip {
  position: relative;
  margin: 28px 0 0;
  overflow: hidden;
  border: 1px solid var(--about-line);
}
.page-about .about-strip img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  opacity: 0.5;
  filter: saturate(0.72);
}
.page-about .about-strip figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 16px 18px 13px;
  font-family: var(--hh-font-data);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--hh-soft);
  background: linear-gradient(180deg, rgba(11, 18, 32, 0) 0%, rgba(11, 18, 32, 0.92) 100%);
}

/* ---------- 三组人 ---------- */
.page-about .about-crew {
  list-style: none;
  margin: 26px 0 0;
  padding: 1px;
  display: grid;
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}
@media (min-width: 820px) {
  .page-about .about-crew {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
.page-about .about-crew__item {
  position: relative;
  background: var(--hh-stand);
  padding: 22px 20px 24px;
  display: grid;
  gap: 9px;
  align-content: start;
  transition: background 0.3s var(--hh-ease);
}
.page-about .about-crew__item::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--hh-green);
  opacity: 0;
  transition: opacity 0.3s var(--hh-ease);
}
.page-about .about-crew__item:hover,
.page-about .about-crew__item:focus-within {
  background: #15203a;
}
.page-about .about-crew__item:hover::after,
.page-about .about-crew__item:focus-within::after {
  opacity: 1;
}
.page-about .about-crew__name {
  margin: 0;
}
.page-about .about-crew__tag {
  margin: 0;
  font-family: var(--hh-font-data);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--hh-amber);
}
.page-about .about-crew__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--hh-soft);
}

/* ---------- 下一步入口 ---------- */
.page-about .about-next {
  display: grid;
  gap: 14px;
  margin-top: 4px;
}
@media (min-width: 820px) {
  .page-about .about-next {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
.page-about .about-next__card {
  display: grid;
  gap: 10px;
  align-content: start;
  padding: 22px 20px 20px;
  text-decoration: none;
  color: var(--hh-text);
  border: 1px solid var(--about-line);
  background: linear-gradient(160deg, rgba(27, 39, 64, 0.85) 0%, rgba(17, 26, 43, 0.9) 100%);
  transition: border-color 0.3s var(--hh-ease), transform 0.3s var(--hh-ease);
}
.page-about .about-next__card:hover {
  border-color: var(--hh-green);
  transform: translateY(-3px);
}
.page-about .about-next__card h3 {
  margin: 0;
}
.page-about .about-next__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--hh-soft);
}
.page-about .about-next__go {
  font-family: var(--hh-font-data);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--hh-green);
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-stat,
  .page-about .about-crew__item,
  .page-about .about-next__card,
  .page-about .about-index__item::before {
    transition: none;
  }
  .page-about .about-next__card:hover {
    transform: none;
  }
}