.page-about {
  --about-year-col: 66px;
  --about-line: rgba(74, 85, 104, 0.32);
  --about-hair: rgba(74, 85, 104, 0.22);
  color: var(--white);
  overflow-x: clip;
}

@media (min-width: 760px) {
  .page-about {
    --about-year-col: 104px;
  }
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray-text);
}

.page-about .breadcrumb a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) ease, border-color var(--dur) ease;
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .breadcrumb__sep {
  color: var(--line);
}

.page-about .breadcrumb__item {
  color: var(--white);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: calc(var(--header-h) + 26px);
  padding-bottom: clamp(26px, 4vw, 54px);
}

.page-about .about-hero__frame {
  position: relative;
  padding: clamp(20px, 3.2vw, 46px);
  border: 1px solid rgba(74, 85, 104, 0.36);
  border-radius: var(--rad);
  background: linear-gradient(158deg, rgba(17, 22, 51, 0.96) 0%, rgba(10, 14, 39, 0.98) 64%);
  overflow: hidden;
}

.page-about .about-hero__frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(74, 85, 104, 0.13) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74, 85, 104, 0.13) 1px, transparent 1px);
  background-size: 46px 46px;
  opacity: 0.55;
  pointer-events: none;
}

.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  top: -34%;
  right: -12%;
  width: 48%;
  height: 168%;
  background: radial-gradient(closest-side, rgba(50, 245, 208, 0.13), transparent 72%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(22px, 3.4vw, 42px);
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    align-items: center;
  }
}

.page-about .about-hero__copy .eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about h1 {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-size: clamp(26px, 5.2vw, 45px);
  line-height: 1.13;
  letter-spacing: -0.02em;
  font-weight: 800;
}

.page-about .about-hero__copy .lede {
  margin: 18px 0 0;
  max-width: 54ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--gray-text);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(118px, 1fr));
  gap: 1px;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  list-style: none;
  background: rgba(74, 85, 104, 0.3);
  border: 1px solid rgba(74, 85, 104, 0.3);
  border-radius: var(--rad);
}

.page-about .about-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 16px;
  background: var(--bg);
}

.page-about .about-hero__fact-num {
  font-family: var(--font-mono);
  font-size: clamp(19px, 3vw, 26px);
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-about .about-hero__fact-cap {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--gray-text);
}

/* ---------- 图片基础 ---------- */
.page-about .about-figure {
  margin: 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid rgba(74, 85, 104, 0.34);
  border-radius: var(--rad);
  background: var(--graphite);
  object-fit: cover;
}

.page-about .about-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.7;
  letter-spacing: 0.05em;
  color: var(--gray-text);
}

.page-about .about-figure--hero img {
  border-color: rgba(50, 245, 208, 0.28);
  box-shadow: 0 26px 60px -46px rgba(50, 245, 208, 0.7);
}

/* ---------- 章节索引 ---------- */
.page-about .about-jump {
  position: sticky;
  top: var(--header-h);
  z-index: 4;
  background: rgba(10, 14, 39, 0.94);
  border-top: 1px solid var(--about-hair);
  border-bottom: 1px solid var(--about-hair);
  overflow: hidden;
}

.page-about .about-jump__inner {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 0;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-jump__label {
  flex: none;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--line);
}

.page-about .about-jump__list {
  display: flex;
  flex: none;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-jump__list a {
  display: block;
  white-space: nowrap;
  padding: 7px 12px;
  border: 1px solid rgba(74, 85, 104, 0.35);
  border-radius: var(--rad);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--gray-text);
  text-decoration: none;
  transition: color var(--dur) ease, border-color var(--dur) ease, background var(--dur) ease;
}

.page-about .about-jump__list a:hover,
.page-about .about-jump__list a:focus-visible {
  color: var(--white);
  border-color: rgba(50, 245, 208, 0.5);
  background: rgba(50, 245, 208, 0.07);
}

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  padding: clamp(44px, 6.5vw, 92px) 0;
  border-bottom: 1px solid rgba(74, 85, 104, 0.18);
  scroll-margin-top: calc(var(--header-h) + 58px);
}

.page-about .about-section:last-of-type {
  border-bottom: 0;
}

.page-about .about-section__head {
  max-width: 66ch;
  margin-bottom: clamp(24px, 4vw, 46px);
}

.page-about .about-section h2 {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-size: clamp(22px, 3.4vw, 33px);
  line-height: 1.2;
  letter-spacing: -0.015em;
  font-weight: 800;
}

.page-about .about-section__lede {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--gray-text);
}

/* ---------- 展览标签 ---------- */
.page-about .exhibit-label {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
}

.page-about .exhibit-label__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--orange);
}

.page-about .exhibit-label__title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--white);
}

.page-about .exhibit-label__meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--line);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  margin-top: clamp(6px, 1.6vw, 14px);
}

.page-about .about-timeline .chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
}

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

.page-about .timeline__node {
  position: relative;
  display: grid;
  grid-template-columns: var(--about-year-col) minmax(0, 1fr);
  gap: 20px;
  padding: 16px 0;
}

.page-about .timeline__node::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: calc(var(--about-year-col) + 9px);
  width: 1px;
  background: var(--about-line);
}

.page-about .timeline__node::after {
  content: "";
  position: absolute;
  top: 23px;
  left: calc(var(--about-year-col) + 6px);
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--bg);
  border: 1px solid var(--cyan);
  transition: background var(--dur) ease, box-shadow var(--dur) ease;
}

.page-about .timeline__node:hover::after {
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(50, 245, 208, 0.14);
}

.page-about .timeline__year {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding-top: 14px;
  text-align: right;
}

.page-about .timeline__year-num {
  font-family: var(--font-mono);
  font-size: clamp(15px, 2.3vw, 20px);
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-about .timeline__year-tag {
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--gray-text);
}

.page-about .timeline__card {
  padding: 16px 18px;
  border: 1px solid rgba(74, 85, 104, 0.3);
  border-left: 2px solid rgba(50, 245, 208, 0.45);
  border-radius: var(--rad);
  background: var(--panel);
  box-shadow: 0 14px 30px -26px rgba(0, 0, 0, 0.95);
  transition: border-color var(--dur) ease, transform var(--dur) ease;
}

.page-about .timeline__card:hover {
  border-left-color: var(--cyan);
  transform: translateX(2px);
}

.page-about .timeline__card h3 {
  margin: 0;
  font-family: var(--font-head);
  font-size: 16px;
  line-height: 1.42;
  font-weight: 700;
  letter-spacing: -0.005em;
}

.page-about .timeline__card p {
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--gray-text);
}

.page-about .timeline__meta {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px dashed rgba(74, 85, 104, 0.35);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--line);
}

.page-about .timeline__card--flag {
  border-left-color: rgba(255, 122, 61, 0.6);
}

.page-about .timeline__card--flag:hover {
  border-left-color: var(--orange);
}

/* ---------- 十二类数据目录 ---------- */
.page-about .about-catalog {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: rgba(74, 85, 104, 0.24);
  border: 1px solid rgba(74, 85, 104, 0.24);
  border-radius: var(--rad);
  overflow: hidden;
}

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

@media (min-width: 1080px) {
  .page-about .about-catalog {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-catalog__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 12px;
  align-items: baseline;
  padding: 16px 18px;
  background: var(--bg);
  transition: background var(--dur) ease;
}

.page-about .about-catalog__item:hover {
  background: var(--panel);
}

.page-about .about-catalog__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--violet);
}

.page-about .about-catalog__name {
  font-size: 14.5px;
  font-weight: 600;
  color: var(--white);
}

.page-about .about-catalog__note {
  grid-column: 2;
  font-size: 12.5px;
  line-height: 1.72;
  color: var(--gray-text);
}

/* ---------- 分层口径 ---------- */
.page-about .about-caliber {
  margin-top: clamp(24px, 3.6vw, 44px);
  padding: clamp(18px, 2.6vw, 30px);
  border: 1px solid rgba(74, 85, 104, 0.28);
  border-top: 2px solid rgba(124, 92, 255, 0.6);
  border-radius: var(--rad);
  background: var(--panel);
}

.page-about .about-caliber__lead {
  margin: 0;
  max-width: 70ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--white);
}

.page-about .about-caliber__list {
  display: grid;
  gap: 1px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  background: rgba(74, 85, 104, 0.24);
  border: 1px solid rgba(74, 85, 104, 0.24);
}

@media (min-width: 760px) {
  .page-about .about-caliber__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .about-caliber__row {
  display: grid;
  gap: 5px;
  padding: 14px 16px;
  background: var(--graphite);
}

.page-about .about-caliber__key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-about .about-caliber__val {
  font-size: 13px;
  line-height: 1.75;
  color: var(--gray-text);
}

.page-about .about-caliber__foot {
  margin: 20px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--gray-text);
}

.page-about .about-caliber__foot a,
.page-about .about-licence__note a,
.page-about .about-versions__foot a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(50, 245, 208, 0.32);
  transition: border-color var(--dur) ease;
}

.page-about .about-caliber__foot a:hover,
.page-about .about-licence__note a:hover,
.page-about .about-versions__foot a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 场馆 ---------- */
.page-about .about-venue {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

@media (min-width: 940px) {
  .page-about .about-venue {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.04fr);
    align-items: start;
  }
}

.page-about .about-venue__copy h2 {
  margin-top: 12px;
}

.page-about .about-venue__copy > p {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--gray-text);
}

.page-about .about-venue__steps {
  display: grid;
  gap: 1px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  background: rgba(74, 85, 104, 0.24);
  border: 1px solid rgba(74, 85, 104, 0.24);
}

.page-about .about-venue__step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 14px 16px;
  background: var(--bg);
}

.page-about .about-venue__step-no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--orange);
}

.page-about .about-venue__step-body {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.page-about .about-venue__step-body strong {
  font-size: 14px;
  font-weight: 600;
  color: var(--white);
}

.page-about .about-venue__step-body em {
  font-style: normal;
  font-size: 12.5px;
  line-height: 1.72;
  color: var(--gray-text);
}

.page-about .about-venue__source {
  margin: 18px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.9;
  letter-spacing: 0.04em;
  color: var(--line);
}

.page-about .about-figure--venue img {
  border-color: rgba(46, 107, 255, 0.3);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: clamp(24px, 4vw, 46px);
}

@media (min-width: 940px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: center;
  }
}

.page-about .about-team__list {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: rgba(74, 85, 104, 0.24);
  border: 1px solid rgba(74, 85, 104, 0.24);
  border-radius: var(--rad);
  overflow: hidden;
}

.page-about .about-team__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 8px 16px;
  align-items: baseline;
  padding: 16px 18px;
  background: var(--panel);
  transition: background var(--dur) ease;
}

.page-about .about-team__item:hover {
  background: var(--graphite);
}

.page-about .about-team__num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 28px);
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-about .about-team__body {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.page-about .about-team__role {
  font-size: 14.5px;
  font-weight: 600;
  color: var(--white);
}

.page-about .about-team__desc {
  font-size: 12.5px;
  line-height: 1.72;
  color: var(--gray-text);
}

/* ---------- 版本演进 ---------- */
.page-about .about-section .chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
}

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

@media (min-width: 720px) {
  .page-about .about-versions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .about-versions {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-version {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 18px;
  border: 1px solid rgba(74, 85, 104, 0.28);
  border-radius: var(--rad);
  background: var(--panel);
  transition: border-color var(--dur) ease, transform var(--dur) ease;
}

.page-about .about-version:hover {
  border-color: rgba(124, 92, 255, 0.5);
  transform: translateY(-2px);
}

.page-about .about-version__ver {
  font-family: var(--font-mono);
  font-size: 21px;
  letter-spacing: 0.04em;
  color: var(--violet);
}

.page-about .about-version__title {
  font-size: 14.5px;
  font-weight: 700;
  color: var(--white);
}

.page-about .about-version__desc {
  margin: 0;
  font-size: 12.8px;
  line-height: 1.78;
  color: var(--gray-text);
}

.page-about .about-version__cap {
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px dashed rgba(74, 85, 104, 0.32);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: var(--line);
}

.page-about .about-versions__foot {
  margin: 20px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--gray-text);
}

/* ---------- 运营信息 ---------- */
.page-about .about-licence {
  display: grid;
  gap: clamp(24px, 4vw, 52px);
}

@media (min-width: 940px) {
  .page-about .about-licence {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
    align-items: start;
  }
}

.page-about .about-licence__main > p {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--gray-text);
}

.page-about .about-licence__facts {
  display: grid;
  gap: 1px;
  margin: 24px 0 0;
  padding: 0;
  background: rgba(74, 85, 104, 0.24);
  border: 1px solid rgba(74, 85, 104, 0.24);
  border-radius: var(--rad);
  overflow: hidden;
}

.page-about .about-licence__row {
  display: grid;
  gap: 4px;
  padding: 14px 16px;
  background: var(--graphite);
}

@media (min-width: 620px) {
  .page-about .about-licence__row {
    grid-template-columns: 150px minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }
}

.page-about .about-licence__row dt {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gray-text);
}

.page-about .about-licence__row dd {
  margin: 0;
  font-size: 14px;
  color: var(--white);
  word-break: break-word;
}

.page-about .about-licence__note {
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: 13px;
  line-height: 1.85;
  color: var(--gray-text);
}

.page-about .about-lake-line {
  display: block;
  width: 100%;
  height: 44px;
  margin-top: 26px;
  color: rgba(46, 107, 255, 0.34);
}

.page-about .about-licence__side {
  padding: 20px;
  border: 1px solid rgba(74, 85, 104, 0.28);
  border-top: 2px solid rgba(255, 122, 61, 0.6);
  border-radius: var(--rad);
  background: var(--panel);
}

.page-about .about-licence__side h3 {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gray-text);
}

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

.page-about .about-licence__side li {
  font-size: 13px;
  line-height: 1.72;
  color: var(--gray-text);
}

.page-about .about-licence__side a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(50, 245, 208, 0.3);
  transition: border-color var(--dur) ease;
}

.page-about .about-licence__side a:hover,
.page-about .about-licence__side a:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ---------- 减少动态 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .timeline__card,
  .page-about .timeline__node::after,
  .page-about .about-version,
  .page-about .about-catalog__item,
  .page-about .about-jump__list a {
    transition: none;
  }
}