.page-about {
  --about-card: #FFFDF8;
  --about-wide: 1180px;
  background: var(--hb-paper);
  color: var(--hb-ink);
  padding-bottom: clamp(2.4rem, 7vw, 5rem);
}

.page-about .about-crumb {
  padding-top: clamp(1rem, 2.4vw, 1.6rem);
  padding-bottom: clamp(.5rem, 1.4vw, .9rem);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(.9rem, 2.4vw, 1.6rem) 0 clamp(1.8rem, 4.5vw, 3rem);
  border-bottom: var(--hb-edge);
}

.page-about .about-eyebrow {
  display: inline-block;
  margin: 0 0 1rem;
  padding: .3rem .6rem;
  background: var(--hb-ink);
  color: var(--hb-yellow);
  font-family: var(--hb-font-mono);
  font-size: .7rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  border: 2px solid var(--hb-ink);
}

.page-about .about-hero h1 {
  margin: 0 0 1.1rem;
  max-width: 16em;
  font-family: var(--hb-font-display);
  font-weight: 900;
  font-size: clamp(2.15rem, 7.4vw, 4.5rem);
  line-height: 1.03;
  letter-spacing: -.02em;
}

.page-about .about-hl {
  display: inline-block;
  padding: 0 .16em .04em;
  background: var(--hb-orange);
  color: var(--hb-ink);
  box-shadow: var(--hb-shadow-sm);
}

.page-about .about-lead {
  max-width: 60ch;
  margin: 0;
  color: var(--hb-graphite);
  font-size: clamp(.96rem, 1.8vw, 1.06rem);
  line-height: 1.85;
}

.page-about .about-stats {
  list-style: none;
  margin: clamp(1.4rem, 3.6vw, 2.2rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  background: var(--hb-graphite);
  border: var(--hb-edge);
  box-shadow: var(--hb-shadow-orange);
}

.page-about .about-stat {
  background: var(--hb-ink);
  color: var(--hb-paper);
  padding: clamp(.85rem, 2.3vw, 1.3rem);
}

.page-about .about-stat-num {
  display: block;
  font-family: var(--hb-font-mono);
  font-weight: 700;
  font-size: clamp(1.55rem, 5vw, 2.3rem);
  line-height: 1;
  color: var(--hb-yellow);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stat-label {
  display: block;
  margin-top: .4rem;
  font-size: .76rem;
  letter-spacing: .04em;
  color: var(--hb-line);
}

/* ---------- 布局与索引 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  padding-top: clamp(1.4rem, 4vw, 2.4rem);
}

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

.page-about .about-index-title {
  margin: 0 0 .6rem;
  font-family: var(--hb-font-mono);
  font-size: .66rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--hb-orange-deep);
}

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

.page-about .about-index-link {
  display: flex;
  gap: .5rem;
  align-items: baseline;
  padding: .35rem .4rem;
  margin-left: -3px;
  border-left: 3px solid transparent;
  color: var(--hb-graphite);
  font-size: .82rem;
  text-decoration: none;
  transition: color .16s ease, border-color .16s ease, transform .16s ease;
}

.page-about .about-index-link:hover,
.page-about .about-index-link:focus-visible {
  color: var(--hb-ink);
  border-left-color: var(--hb-orange);
  transform: translateX(2px);
}

.page-about .about-index-num {
  font-family: var(--hb-font-mono);
  font-size: .68rem;
  color: var(--hb-orange-deep);
}

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

/* ---------- 章节 ---------- */
.page-about .about-section {
  padding: clamp(1.5rem, 4vw, 2.4rem) 0 clamp(1.7rem, 4.4vw, 2.8rem);
  border-bottom: 1px solid var(--hb-line);
  scroll-margin-top: 5rem;
}

.page-about .about-section h2 {
  margin: 0 0 1rem;
  padding-left: .7rem;
  border-left: 6px solid var(--hb-orange);
  font-family: var(--hb-font-display);
  font-weight: 900;
  font-size: clamp(1.32rem, 3.6vw, 2.05rem);
  line-height: 1.16;
  letter-spacing: -.01em;
}

.page-about .about-section .hb-text {
  max-width: 64ch;
  margin: 0 0 1em;
  color: var(--hb-graphite);
  line-height: 1.85;
}

.page-about .about-section .hb-text:last-child {
  margin-bottom: 0;
}

/* ---------- 图片 ---------- */
.page-about .about-media {
  margin: 0 0 clamp(1.2rem, 3vw, 1.8rem);
  border: var(--hb-edge);
  background: var(--hb-ink);
  box-shadow: var(--hb-shadow-sm);
  overflow: hidden;
}

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

.page-about .about-media-cap {
  margin: 0;
  padding: .55rem .8rem;
  border-top: 2px solid var(--hb-graphite);
  background: var(--hb-ink);
  color: var(--hb-line);
  font-family: var(--hb-font-mono);
  font-size: .72rem;
  line-height: 1.65;
}

/* ---------- 事实条 ---------- */
.page-about .about-facts {
  list-style: none;
  margin: clamp(1rem, 2.8vw, 1.6rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: .6rem;
}

.page-about .about-fact {
  border: 2px solid var(--hb-ink);
  background: var(--about-card);
  padding: .7rem .8rem .8rem;
}

.page-about .about-fact-num {
  display: block;
  font-family: var(--hb-font-mono);
  font-weight: 700;
  font-size: clamp(1.3rem, 4.2vw, 1.75rem);
  line-height: 1;
  color: var(--hb-orange-deep);
  font-variant-numeric: tabular-nums;
}

.page-about .about-fact-unit {
  font-size: .6em;
  margin-left: .05em;
}

.page-about .about-fact-label {
  display: block;
  margin-top: .35rem;
  font-size: .76rem;
  line-height: 1.5;
  color: var(--hb-graphite);
}

/* ---------- 团队卡片 ---------- */
.page-about .about-crew {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: .8rem;
  margin-top: 1.2rem;
}

.page-about .about-crew-card {
  padding: 1rem 1rem 1.1rem;
  background: var(--about-card);
  border: var(--hb-edge);
  box-shadow: var(--hb-shadow-sm);
  transition: transform .16s ease, border-color .16s ease;
}

.page-about .about-crew-card:hover {
  transform: translateY(-2px);
  border-color: var(--hb-orange);
}

.page-about .about-crew-card:nth-child(1) { border-top-width: 6px; border-top-color: var(--hb-data); }
.page-about .about-crew-card:nth-child(2) { border-top-width: 6px; border-top-color: var(--hb-pitch); }
.page-about .about-crew-card:nth-child(3) { border-top-width: 6px; border-top-color: var(--hb-orange); }

.page-about .about-crew-head {
  margin: 0 0 .45rem;
  font-family: var(--hb-font-mono);
  font-size: .68rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--hb-graphite);
}

.page-about .about-crew-num {
  display: block;
  margin: 0 0 .55rem;
  font-family: var(--hb-font-mono);
  font-weight: 700;
  font-size: clamp(2rem, 6.4vw, 2.8rem);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.page-about .about-crew-desc {
  margin: 0;
  font-size: .87rem;
  line-height: 1.78;
  color: var(--hb-graphite);
}

/* ---------- 场馆核录步骤 ---------- */
.page-about .about-steps {
  list-style: none;
  margin: 1.2rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: .7rem;
}

.page-about .about-step {
  padding: .85rem 1rem .95rem;
  background: var(--about-card);
  border-top: 2px solid var(--hb-ink);
  border-right: 2px solid var(--hb-ink);
  border-bottom: 2px solid var(--hb-ink);
  border-left: 6px solid var(--hb-orange);
}

.page-about .about-step-idx {
  font-family: var(--hb-font-mono);
  font-size: .68rem;
  letter-spacing: .14em;
  color: var(--hb-orange-deep);
}

.page-about .about-step-title {
  margin: .2rem 0 .35rem;
  font-family: var(--hb-font-display);
  font-weight: 900;
  font-size: 1.04rem;
  line-height: 1.35;
}

.page-about .about-step-text {
  margin: 0;
  max-width: 58ch;
  font-size: .87rem;
  line-height: 1.78;
  color: var(--hb-graphite);
}

.page-about .about-callout {
  max-width: 58ch;
  margin: 1.1rem 0 0;
  padding: .8rem 1rem;
  background: var(--hb-yellow);
  color: var(--hb-ink);
  border: var(--hb-edge);
  box-shadow: var(--hb-shadow-sm);
  font-size: .88rem;
  line-height: 1.72;
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  isolation: isolate;
  margin-top: 1.4rem;
  padding: .9rem .7rem .9rem .5rem;
  border: var(--hb-edge);
  background: var(--hb-paper);
}

.page-about .about-timeline-tex {
  position: absolute;
  inset: 0;
  z-index: -1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .13;
  pointer-events: none;
}

.page-about .about-tl {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .65rem;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  top: .7rem;
  bottom: .7rem;
  left: .34rem;
  width: 3px;
  background: var(--hb-ink);
}

.page-about .about-tl-item {
  position: relative;
  padding-left: 1.6rem;
  display: block;
}

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78rem;
  width: .7rem;
  height: .7rem;
  background: var(--hb-orange);
  border: 2px solid var(--hb-ink);
}

.page-about .about-tl-summary {
  display: flex;
  align-items: baseline;
  gap: .7rem;
  padding: .5rem .8rem;
  background: var(--about-card);
  border: 2px solid var(--hb-ink);
  cursor: pointer;
  list-style: none;
  transition: border-color .16s ease, background .16s ease, color .16s ease;
}

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

.page-about .about-tl-summary:hover,
.page-about .about-tl-summary:focus-visible {
  border-color: var(--hb-orange);
}

.page-about .about-tl-item[open] > .about-tl-summary {
  background: var(--hb-ink);
  color: var(--hb-paper);
}

.page-about .about-tl-summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--hb-font-mono);
  font-size: 1.1rem;
  line-height: 1;
  color: var(--hb-orange);
}

.page-about .about-tl-item[open] > .about-tl-summary::after {
  content: "−";
  color: var(--hb-yellow);
}

.page-about .about-tl-year {
  flex: none;
  font-family: var(--hb-font-mono);
  font-weight: 700;
  font-size: .95rem;
  color: var(--hb-orange-deep);
  font-variant-numeric: tabular-nums;
}

.page-about .about-tl-item[open] > .about-tl-summary .about-tl-year {
  color: var(--hb-yellow);
}

.page-about .about-tl-title {
  font-family: var(--hb-font-display);
  font-weight: 900;
  font-size: .97rem;
  line-height: 1.42;
}

.page-about .about-tl-body {
  margin-left: .45rem;
  padding: .7rem .75rem .1rem;
  border-left: 2px solid var(--hb-line);
  font-size: .87rem;
  line-height: 1.8;
  color: var(--hb-graphite);
}

.page-about .about-tl-body p {
  margin: 0 0 .6em;
}

.page-about .about-tl-body p:last-child {
  margin-bottom: 0;
}

/* ---------- 合作与荣誉 ---------- */
.page-about .about-partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: .8rem;
  margin: 1.2rem 0 0;
}

.page-about .about-partner-card {
  padding: 1rem 1.05rem 1.1rem;
  background: var(--hb-ink);
  color: var(--hb-paper);
  border: var(--hb-edge);
  box-shadow: var(--hb-shadow-orange);
}

.page-about .about-partner-num {
  margin: 0;
  font-family: var(--hb-font-mono);
  font-weight: 700;
  font-size: clamp(1.9rem, 6vw, 2.6rem);
  line-height: 1;
  color: var(--hb-yellow);
  font-variant-numeric: tabular-nums;
}

.page-about .about-partner-title {
  margin: .45rem 0 .5rem;
  font-family: var(--hb-font-display);
  font-weight: 900;
  font-size: 1rem;
  line-height: 1.4;
  color: var(--hb-paper);
}

.page-about .about-partner-text {
  margin: 0;
  font-size: .86rem;
  line-height: 1.78;
  color: var(--hb-line);
}

.page-about .about-honors {
  list-style: none;
  margin: 1.1rem 0;
  padding: 0;
  display: grid;
  gap: .55rem;
}

.page-about .about-honor {
  display: flex;
  align-items: center;
  gap: .65rem;
  flex-wrap: wrap;
  padding: .55rem .75rem;
  background: var(--about-card);
  border: 2px solid var(--hb-ink);
  border-left-width: 6px;
  border-left-color: var(--hb-orange);
}

.page-about .about-honor-text {
  font-size: .88rem;
  line-height: 1.6;
}

/* ---------- 联系 ---------- */
.page-about .about-contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2px;
  margin: 1.2rem 0 0;
  background: var(--hb-graphite);
  border: var(--hb-edge);
}

.page-about .about-contact-item {
  background: var(--about-card);
  padding: .8rem .9rem .9rem;
}

.page-about .about-contact-label {
  margin: 0 0 .35rem;
  font-family: var(--hb-font-mono);
  font-size: .66rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--hb-orange-deep);
}

.page-about .about-contact-value {
  margin: 0;
  font-family: var(--hb-font-mono);
  font-weight: 700;
  font-size: clamp(.95rem, 2.6vw, 1.12rem);
  line-height: 1.4;
  word-break: break-word;
  color: var(--hb-ink);
}

.page-about .about-contact-note {
  margin: .8rem 0 0;
  max-width: 60ch;
  font-size: .85rem;
  line-height: 1.75;
  color: var(--hb-graphite);
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  margin-top: 1.2rem;
}

/* ---------- 返回顶部 ---------- */
.page-about .about-foot {
  padding: clamp(1.4rem, 4vw, 2.2rem) 0 0;
  text-align: right;
}

.page-about .about-top-link {
  display: inline-block;
  padding: .45rem .8rem;
  border: 2px solid var(--hb-ink);
  background: var(--about-card);
  color: var(--hb-ink);
  font-family: var(--hb-font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  text-decoration: none;
  transition: transform .16s ease, border-color .16s ease, background .16s ease;
}

.page-about .about-top-link:hover,
.page-about .about-top-link:focus-visible {
  transform: translateY(-2px);
  border-color: var(--hb-orange);
  background: var(--hb-yellow);
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .about-contact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 860px) {
  .page-about .about-crew {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 980px) {
  .page-about .about-layout {
    grid-template-columns: 184px minmax(0, 1fr);
    gap: clamp(1.6rem, 3.6vw, 3rem);
    align-items: start;
  }

  .page-about .about-index {
    display: block;
    position: sticky;
    top: 5.5rem;
    align-self: start;
    border-left: 3px solid var(--hb-ink);
    padding-left: .85rem;
  }

  .page-about .about-body {
    max-width: var(--about-wide);
  }

  .page-about .about-timeline {
    padding: 1.1rem 1.2rem 1.2rem 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-crew-card,
  .page-about .about-index-link,
  .page-about .about-top-link,
  .page-about .about-tl-summary {
    transition: none;
  }

  .page-about .about-crew-card:hover,
  .page-about .about-index-link:hover,
  .page-about .about-top-link:hover {
    transform: none;
  }
}
<<<PAGE_CSS_BOUNDARY>>>