.page-about {
  background: var(--deep);
  color: var(--cream);
  overflow-x: hidden;
}

/* ---------- 首屏封面 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 24px 0 44px;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(780px 460px at 84% -14%, rgba(0, 229, 199, 0.15), transparent 68%),
    radial-gradient(620px 380px at 4% 112%, rgba(255, 107, 53, 0.13), transparent 68%);
  pointer-events: none;
}

.page-about .about-hero-inner {
  position: relative;
  z-index: 1;
}

.page-about .breadcrumbs {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--rock);
}

.page-about .about-hero-grid {
  margin-top: 26px;
  display: grid;
  gap: 30px;
}

.page-about .about-hero-copy .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(38px, 8.4vw, 76px);
  line-height: 0.98;
  letter-spacing: 0;
  color: var(--cream);
  max-width: 20ch;
}

.page-about .about-hero .lead {
  margin: 20px 0 0;
  font-family: var(--font-serif);
  font-size: clamp(16.5px, 1.7vw, 20px);
  line-height: 1.72;
  color: var(--cream-dim);
  max-width: 44ch;
}

.page-about .about-hero-stats {
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.page-about .about-hero-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .about-hero-stat + .about-hero-stat {
  border-left: 1px solid var(--line-soft);
  padding-left: 14px;
}

.page-about .about-hero-stat .hv {
  font-family: var(--font-mono);
  font-size: clamp(20px, 5.6vw, 30px);
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-hero-stat .hk {
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--cream-mute);
}

.page-about .about-hero-media {
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-about .about-hero-media img {
  max-width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 正文骨架 ---------- */
.page-about .about-layout {
  padding-top: 26px;
  padding-bottom: 64px;
}

.page-about .about-index {
  position: sticky;
  top: 0;
  z-index: 6;
  margin: 0 -20px 10px;
  padding: 10px 20px 12px;
  background: linear-gradient(180deg, var(--deep) 76%, rgba(10, 26, 47, 0));
}

.page-about .about-index-title {
  display: none;
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--rock);
}

.page-about .about-index-list {
  list-style: none;
  margin: 0;
  padding: 2px 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-index-list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  padding: 7px 14px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  font-size: 13.5px;
  color: var(--cream-dim);
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .about-index-list a .num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--rock);
}

.page-about .about-index-list a:hover,
.page-about .about-index-list a.is-current {
  color: var(--cyan);
  border-color: var(--line-strong);
  background: rgba(0, 229, 199, 0.08);
}

.page-about .about-index-list a.is-current .num {
  color: var(--cyan);
}

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  padding: 34px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-section:first-child {
  border-top: 0;
  padding-top: 8px;
}

.page-about .about-section-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 18px;
}

.page-about .about-sec-num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.16em;
  color: var(--rock);
  transition: color 0.24s var(--ease);
}

.page-about .about-section.is-current .about-sec-num {
  color: var(--cyan);
}

.page-about .about-section h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(25px, 5.2vw, 42px);
  line-height: 1.1;
  color: var(--cream);
  letter-spacing: 0;
}

.page-about .about-prose {
  display: grid;
  gap: 15px;
  margin-bottom: 22px;
}

.page-about .about-prose p {
  margin: 0;
  max-width: 66ch;
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.82;
  color: var(--cream-dim);
}

.page-about .about-quote {
  margin: 22px 0 0;
  padding: 16px 18px;
  border-left: 2px solid var(--clay);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  background: rgba(196, 106, 74, 0.1);
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.72;
  color: var(--cream-dim);
}

.page-about .about-figure {
  margin: 24px 0 0;
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-about .about-figure img {
  max-width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-figure .media-caption {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--cream-mute);
}

/* ---------- 02 数据方法 ---------- */
.page-about .about-method {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(152deg, var(--deep-2), var(--deep-1) 72%);
  padding: 20px;
}

.page-about .about-method-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 10px;
}

.page-about .about-method-stat {
  padding: 14px 14px 13px;
  border-radius: var(--r-md);
  border: 1px solid var(--line-soft);
  background: rgba(7, 19, 34, 0.62);
}

.page-about .about-method-stat .v {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(20px, 5vw, 27px);
  line-height: 1.05;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-method-stat .v .u {
  margin-left: 3px;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--cream-mute);
}

.page-about .about-method-stat .v--orange {
  color: var(--orange);
}

.page-about .about-method-stat .k {
  display: block;
  margin-top: 7px;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--cream-mute);
}

.page-about .about-ticks {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-about .about-ticks li {
  position: relative;
  padding-left: 22px;
  font-family: var(--font-body);
  font-size: 15.5px;
  line-height: 1.72;
  color: var(--cream-dim);
}

.page-about .about-ticks li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(0, 229, 199, 0.14);
}

/* ---------- 03 场馆档案 ---------- */
.page-about .about-archive-facts {
  margin-top: 20px;
  display: grid;
  gap: 12px;
}

.page-about .about-fact {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 16px;
  border-radius: var(--r-md);
  border: 1px solid var(--line-soft);
  background: rgba(47, 93, 80, 0.18);
}

.page-about .about-fact .fv {
  flex: none;
  font-family: var(--font-mono);
  font-size: 24px;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-fact .fk {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--cream-dim);
}

/* ---------- 04 团队与协作 ---------- */
.page-about .about-team-grid {
  display: grid;
  gap: 13px;
  margin-bottom: 18px;
}

.page-about .about-team-card {
  position: relative;
  overflow: hidden;
  padding: 20px 18px 22px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: linear-gradient(158deg, rgba(15, 39, 67, 0.92), rgba(12, 31, 56, 0.72));
  transition: transform 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-about .about-team-card::after {
  content: "";
  position: absolute;
  right: -30px;
  bottom: -40px;
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 229, 199, 0.16), transparent 70%);
  pointer-events: none;
}

.page-about .about-team-card:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
}

.page-about .about-team-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 36px;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-team-card h3 {
  margin: 12px 0 7px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 21px;
  line-height: 1.2;
  color: var(--cream);
}

.page-about .about-team-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--cream-mute);
}

.page-about .about-partners {
  padding: 20px 18px 22px;
  border-radius: var(--r-lg);
  border: 1px solid rgba(47, 93, 80, 0.55);
  background: linear-gradient(150deg, rgba(47, 93, 80, 0.26), rgba(10, 26, 47, 0.1));
}

.page-about .about-partners h3 {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: 19px;
  line-height: 1.3;
  color: var(--cream);
}

.page-about .about-partners p {
  margin: 0;
  max-width: 64ch;
  font-size: 15.5px;
  line-height: 1.76;
  color: var(--cream-dim);
}

.page-about .about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.page-about .about-tags span {
  padding: 6px 12px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  color: var(--cream-dim);
}

/* ---------- 05 发展历程 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 6px 0 0;
  padding: 0;
  display: grid;
  gap: 4px;
}

.page-about .about-tl-item {
  position: relative;
  margin-left: 5px;
  padding: 2px 0 22px 26px;
  border-left: 1px solid var(--line);
}

.page-about .about-tl-item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: -6.5px;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--deep);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(0, 229, 199, 0.1);
  transition: background 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-about .about-tl-item:hover::before {
  background: var(--cyan);
  border-color: var(--orange);
}

.page-about .about-tl-year {
  display: block;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-tl-item h3 {
  margin: 7px 0 7px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.25;
  color: var(--cream);
}

.page-about .about-tl-item p {
  margin: 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.72;
  color: var(--cream-mute);
}

/* ---------- 06 荣誉与标准 ---------- */
.page-about .about-awards {
  display: grid;
  gap: 13px;
}

.page-about .about-award {
  padding: 20px 18px 22px;
  border-radius: var(--r-lg);
  border: 1px solid rgba(196, 106, 74, 0.4);
  background: linear-gradient(152deg, rgba(196, 106, 74, 0.16), rgba(10, 26, 47, 0));
}

.page-about .about-award-year {
  display: block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.16em;
  color: var(--clay);
  font-variant-numeric: tabular-nums;
}

.page-about .about-award h3 {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  line-height: 1.2;
  color: var(--cream);
}

.page-about .about-award p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--cream-mute);
}

.page-about .about-standards {
  margin-top: 20px;
  padding: 20px 18px 4px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line-soft);
  background: rgba(15, 39, 67, 0.5);
}

.page-about .about-standards h3 {
  margin: 0 0 14px;
  font-family: var(--font-serif);
  font-size: 18px;
  line-height: 1.3;
  color: var(--cream);
}

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

.page-about .about-standards li {
  font-size: 15.5px;
  line-height: 1.76;
  color: var(--cream-dim);
}

.page-about .about-standards .num {
  display: inline-block;
  margin-right: 8px;
  padding: 2px 9px;
  border-radius: var(--r-pill);
  background: rgba(0, 229, 199, 0.12);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

/* ---------- 合作入口 ---------- */
.page-about .about-cta {
  position: relative;
  padding: 52px 0 60px;
  border-top: 1px solid var(--line-soft);
  background:
    radial-gradient(720px 360px at 88% -6%, rgba(124, 92, 255, 0.18), transparent 70%),
    radial-gradient(620px 320px at 6% 108%, rgba(255, 107, 53, 0.13), transparent 70%),
    var(--deep-1);
}

.page-about .about-cta-inner .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--violet);
}

.page-about .about-cta h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(28px, 6vw, 46px);
  line-height: 1.08;
  color: var(--cream);
  max-width: 18ch;
}

.page-about .about-cta-inner > p {
  margin: 16px 0 0;
  max-width: 56ch;
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--cream-dim);
}

.page-about .about-cta-actions {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 中等屏 ---------- */
@media (min-width: 760px) {
  .page-about .about-hero {
    padding: 34px 0 56px;
  }

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

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

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

  .page-about .about-fact {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}

/* ---------- 桌面端 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    align-items: end;
    gap: 50px;
  }

  .page-about .about-hero .lead {
    max-width: 40ch;
  }

  .page-about .about-timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
    margin-top: 14px;
  }

  .page-about .about-tl-item {
    margin-left: 0;
    padding: 30px 22px 0 0;
    border-left: 0;
  }

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

  .page-about .about-tl-item::before {
    left: 0;
    top: 0;
    width: 12px;
    height: 12px;
  }

  .page-about .about-tl-item::after {
    content: "";
    position: absolute;
    left: 15px;
    right: 0;
    top: 5px;
    height: 1px;
    background: linear-gradient(90deg, rgba(0, 229, 199, 0.5), rgba(0, 229, 199, 0.06));
  }

  .page-about .about-tl-item:last-child::after {
    display: none;
  }
}

@media (min-width: 1100px) {
  .page-about .about-layout {
    display: grid;
    grid-template-columns: 188px minmax(0, 1fr);
    gap: 58px;
    align-items: start;
    padding-top: 46px;
    padding-bottom: 84px;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h) + 26px);
    margin: 0;
    padding: 0;
    background: none;
  }

  .page-about .about-index-title {
    display: block;
  }

  .page-about .about-index-list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0;
  }

  .page-about .about-index-list a {
    border-radius: 0;
    border: 0;
    border-left: 2px solid var(--line-soft);
    padding: 9px 0 9px 15px;
    font-family: var(--font-mono);
    font-size: 12.5px;
    letter-spacing: 0.05em;
  }

  .page-about .about-index-list a:hover,
  .page-about .about-index-list a.is-current {
    background: rgba(0, 229, 199, 0.06);
    border-left-color: var(--cyan);
  }

  .page-about .about-section {
    padding: 44px 0;
  }

  .page-about .about-section:first-child {
    padding-top: 4px;
  }

  .page-about .about-prose p {
    font-size: 17.5px;
  }

  .page-about .about-method {
    padding: 26px;
  }

  .page-about .about-cta {
    padding: 68px 0 78px;
  }
}
</<PAGE_CSS>>>