.page-about {
  --about-tint: rgba(53, 230, 255, 0.08);
  --about-amber-tint: rgba(255, 177, 61, 0.1);
  --about-soft: rgba(13, 23, 40, 0.72);
  background: var(--ink);
  color: var(--text);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(1.4rem, 4vw, 2.6rem) clamp(2.2rem, 5vw, 4rem);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(900px 520px at 84% 6%, rgba(53, 230, 255, 0.14), transparent 62%),
    radial-gradient(620px 420px at 4% 90%, rgba(255, 177, 61, 0.09), transparent 60%),
    var(--ink);
}

.page-about .hero-grid {
  display: grid;
  gap: clamp(1.6rem, 4vw, 3rem);
  align-items: center;
}

.page-about .crumbs-nav {
  margin-bottom: 1rem;
}

.page-about .about-h1 {
  margin: 0.55rem 0 0.9rem;
  font-size: clamp(1.85rem, 4.6vw, 3.3rem);
  line-height: 1.18;
  font-weight: 800;
  letter-spacing: -0.012em;
  text-wrap: balance;
}

.page-about .about-h1::after {
  content: "";
  display: block;
  width: clamp(56px, 16vw, 128px);
  height: 3px;
  margin-top: 1rem;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--amber) 70%, transparent);
}

.page-about .hero-copy .lead {
  color: var(--muted);
  font-size: clamp(0.98rem, 1.6vw, 1.08rem);
  line-height: 1.75;
}

.page-about .about-updated {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin-top: 1rem;
  padding: 0.28rem 0.72rem;
  border: 1px solid rgba(255, 177, 61, 0.35);
  border-radius: 999px;
  background: var(--about-amber-tint);
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
}

.page-about .hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem 1.1rem;
  margin: 1.5rem 0 1.4rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
}

.page-about .stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.25rem, 2.4vw, 1.6rem);
  line-height: 1.1;
  color: var(--cyan);
}

.page-about .stat-label {
  display: block;
  margin-top: 0.28rem;
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--muted);
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.page-about .hero-visual {
  position: relative;
  min-height: 220px;
  padding: clamp(0.6rem, 2vw, 1.2rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(155deg, rgba(13, 23, 40, 0.92), rgba(6, 11, 20, 0.96));
  overflow: hidden;
}

.page-about .hero-visual::before {
  content: "";
  position: absolute;
  inset: -30% 30% 55% -20%;
  background: radial-gradient(circle, rgba(169, 150, 255, 0.16), transparent 68%);
  pointer-events: none;
}

.page-about .hero-orbit {
  position: absolute;
  right: -80px;
  bottom: -110px;
  width: 280px;
  height: 280px;
  border: 1px solid rgba(53, 230, 255, 0.18);
  border-radius: 50%;
  pointer-events: none;
}

.page-about .hero-map {
  position: relative;
  display: block;
  width: 100%;
  height: auto;
  max-height: 460px;
}

/* ---------- 索引轨道 + 正文 ---------- */
.page-about .about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.4rem, 4vw, 2.6rem);
  padding-block: clamp(1.8rem, 5vw, 3.6rem);
}

.page-about .about-rail {
  position: relative;
  padding: 1rem 0;
  border-top: 1px solid var(--line);
}

.page-about .about-rail-title {
  margin: 0 0 0.7rem;
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  color: var(--amber);
}

.page-about .about-rail-list {
  display: flex;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-rail-list li {
  flex: 0 0 auto;
}

.page-about .about-rail-list a {
  display: inline-flex;
  align-items: baseline;
  gap: 0.42rem;
  padding: 0.5rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.84rem;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-about .about-rail-list a .mono {
  font-size: 0.68rem;
  color: rgba(159, 176, 204, 0.7);
}

.page-about .about-rail-list a:hover,
.page-about .about-rail-list a:focus-visible {
  color: var(--text);
  border-color: rgba(53, 230, 255, 0.45);
}

.page-about .about-rail-list a.is-active,
.page-about .about-rail-list a[aria-current="true"] {
  color: var(--cyan);
  border-color: rgba(53, 230, 255, 0.5);
  background: var(--about-tint);
}

.page-about .about-rail-list a.is-active .mono,
.page-about .about-rail-list a[aria-current="true"] .mono {
  color: var(--amber);
}

.page-about .about-rail-note {
  margin: 0.9rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  position: relative;
  padding-block: clamp(1.6rem, 4vw, 2.6rem);
  border-top: 1px solid var(--line);
}

.page-about .about-section:first-child {
  border-top: 0;
  padding-top: 0.4rem;
}

.page-about .about-sec-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.35rem;
  margin-bottom: 1rem;
}

.page-about .about-sec-num {
  font-size: clamp(2.1rem, 5.4vw, 3.2rem);
  line-height: 1;
  letter-spacing: 0.03em;
  color: rgba(53, 230, 255, 0.24);
  -webkit-text-stroke: 1px rgba(53, 230, 255, 0.42);
}

.page-about .about-sec-title {
  margin: 0;
  font-size: clamp(1.32rem, 2.8vw, 2.05rem);
  line-height: 1.32;
  font-weight: 800;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

.page-about .about-prose {
  margin: 0 0 1.2rem;
  color: var(--muted);
  font-size: clamp(0.96rem, 1.5vw, 1.06rem);
  line-height: 1.8;
  max-width: 68ch;
}

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

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0 0 1.4rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--about-soft);
  overflow: hidden;
}

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

.page-about .figcap {
  padding: 0.6rem 0.9rem;
  border-top: 1px solid var(--line);
  font-size: 0.76rem;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--muted);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 1.6rem;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 0.4rem;
  bottom: 0.6rem;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), rgba(53, 230, 255, 0.35) 55%, transparent);
}

.page-about .tl-node {
  position: relative;
  padding-bottom: 0.85rem;
}

.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: -1.6rem;
  top: 0.85rem;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--panel);
  border: 1px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(53, 230, 255, 0.08);
}

.page-about .tl-node:nth-child(3n + 2)::before {
  border-color: var(--amber);
  box-shadow: 0 0 0 4px var(--about-amber-tint);
}

.page-about .tl-item {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--panel);
  transition: border-color 0.28s var(--ease), background 0.28s var(--ease);
}

.page-about .tl-item[open] {
  border-color: rgba(53, 230, 255, 0.32);
  background: linear-gradient(140deg, rgba(13, 23, 40, 0.98), rgba(6, 11, 20, 0.94));
}

.page-about .tl-item summary {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  padding: 0.72rem 0.9rem;
  cursor: pointer;
  list-style: none;
}

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

.page-about .tl-item summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--cyan);
}

.page-about .tl-item[open] summary::after {
  content: "–";
  color: var(--amber);
}

.page-about .tl-year {
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-about .tl-title {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text);
}

.page-about .tl-detail {
  margin: 0;
  padding: 0 0.9rem 0.85rem;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.75;
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
  margin-bottom: 1.4rem;
}

.page-about .team-card {
  padding: 0.95rem 0.9rem 1.05rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--panel);
}

.page-about .team-num {
  display: block;
  font-size: 1.6rem;
  line-height: 1;
  color: var(--cyan);
}

.page-about .team-role {
  margin: 0.4rem 0 0.35rem;
  font-size: 0.95rem;
  font-weight: 700;
}

.page-about .team-desc {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .team-card--violet .team-num {
  color: var(--violet);
}

.page-about .team-card--amber .team-num {
  color: var(--amber);
}

.page-about .team-card--mint .team-num {
  color: var(--mint);
}

.page-about .team-card--violet {
  border-color: rgba(169, 150, 255, 0.28);
}

.page-about .team-card--amber {
  border-color: rgba(255, 177, 61, 0.28);
}

.page-about .team-card--mint {
  border-color: rgba(86, 240, 184, 0.24);
}

.page-about .about-note-panel {
  position: relative;
  margin-top: 1rem;
  padding: 1.1rem 1.15rem 1.15rem 1.3rem;
  border-left: 2px solid var(--amber);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: linear-gradient(100deg, rgba(255, 177, 61, 0.08), rgba(13, 23, 40, 0.5) 62%);
}

.page-about .about-note-panel p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--text);
}

/* ---------- 标签体系 ---------- */
.page-about .tag-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.7rem;
  margin: 0 0 1.4rem;
  padding: 0;
  list-style: none;
}

.page-about .tag-card {
  position: relative;
  padding: 0.9rem 1rem 0.95rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--panel-deep);
}

.page-about .tag-card::after {
  content: "";
  position: absolute;
  top: 0.55rem;
  right: 0.55rem;
  width: 14px;
  height: 1px;
  background: rgba(53, 230, 255, 0.6);
}

.page-about .tag-card-name {
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: rgba(159, 176, 204, 0.75);
}

.page-about .tag-card h3 {
  margin: 0.3rem 0 0.3rem;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .tag-card:nth-child(2n) h3 {
  color: var(--amber);
}

.page-about .tag-card p {
  margin: 0;
  font-size: 0.84rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-rhythm {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.7rem;
  padding-top: 1rem;
  border-top: 1px dashed var(--line);
}

.page-about .rhythm-item {
  display: grid;
  gap: 0.25rem;
}

.page-about .rhythm-num {
  font-size: 0.86rem;
  letter-spacing: 0.06em;
  color: var(--mint);
}

.page-about .rhythm-item p {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 场景列表 ---------- */
.page-about .pr-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.7rem;
}

.page-about .pr-row {
  display: grid;
  gap: 0.45rem;
  padding: 0.9rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: linear-gradient(120deg, rgba(13, 23, 40, 0.96), rgba(6, 11, 20, 0.86));
  transition: border-color 0.28s var(--ease), transform 0.28s var(--ease);
}

.page-about .pr-row .tag {
  justify-self: start;
}

.page-about .pr-text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--text);
}

.page-about .pr-link {
  justify-self: start;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 230, 255, 0.4);
  padding-bottom: 1px;
}

.page-about .pr-link:hover,
.page-about .pr-link:focus-visible {
  color: var(--amber);
  border-bottom-color: rgba(255, 177, 61, 0.6);
}

.page-about .pr-row:hover,
.page-about .pr-row:focus-within {
  border-color: rgba(53, 230, 255, 0.36);
}

/* ---------- 合作生态 ---------- */
.page-about .partner-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.8rem;
  margin-bottom: 1.4rem;
}

.page-about .partner-card {
  position: relative;
  padding: 1rem 1.05rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background:
    radial-gradient(280px 140px at 100% 0%, rgba(53, 230, 255, 0.09), transparent 70%),
    var(--panel);
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease), background 0.3s var(--ease);
}

.page-about .partner-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.1rem;
  bottom: 1.1rem;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--cyan), transparent);
}

.page-about .partner-name {
  margin: 0.55rem 0 0.4rem;
  font-size: 1rem;
  font-weight: 700;
}

.page-about .partner-detail {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .partner-card:hover,
.page-about .partner-card:focus-within,
.page-about .partner-card:focus-visible {
  border-color: rgba(53, 230, 255, 0.45);
  transform: translateY(-3px);
}

.page-about .partner-card:hover .partner-detail,
.page-about .partner-card:focus-within .partner-detail {
  color: var(--text);
}

/* ---------- 收尾 ---------- */
.page-about .cta-panel {
  display: grid;
  gap: 1.1rem;
  padding: clamp(1.1rem, 3vw, 1.8rem);
  border: 1px solid rgba(255, 177, 61, 0.3);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(420px 220px at 88% 12%, rgba(255, 177, 61, 0.14), transparent 70%),
    linear-gradient(140deg, rgba(13, 23, 40, 0.98), rgba(6, 11, 20, 0.94));
}

.page-about .cta-copy h3 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.1rem, 2.2vw, 1.4rem);
  font-weight: 800;
}

.page-about .cta-copy p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .about-sec-head {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: end;
    gap: 0.2rem 1rem;
  }

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

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

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

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

  .page-about .pr-row {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 0.35rem 1rem;
  }

  .page-about .pr-row .tag {
    grid-column: 1;
    grid-row: 1;
  }

  .page-about .pr-text {
    grid-column: 1;
    grid-row: 2;
  }

  .page-about .pr-link {
    grid-column: 2;
    grid-row: 1 / span 2;
    align-self: center;
  }

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

@media (min-width: 900px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  }

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

  .page-about .cta-panel {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 980px) {
  .page-about .about-grid {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 3.6rem);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 120px;
    align-self: start;
    padding: 0;
    border-top: 0;
  }

  .page-about .about-rail-list {
    flex-direction: column;
    gap: 0.25rem;
    overflow: visible;
  }

  .page-about .about-rail-list a {
    display: flex;
    width: 100%;
    padding: 0.52rem 0.6rem 0.52rem 0.7rem;
    border: 0;
    border-left: 2px solid var(--line);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    white-space: normal;
    font-size: 0.88rem;
    line-height: 1.5;
  }

  .page-about .about-rail-list a:hover {
    border-left-color: rgba(53, 230, 255, 0.5);
    background: rgba(53, 230, 255, 0.05);
  }

  .page-about .about-rail-list a.is-active,
  .page-about .about-rail-list a[aria-current="true"] {
    border-left-color: var(--amber);
    background: var(--about-tint);
  }

  .page-about .about-section {
    padding-block: clamp(2rem, 3.6vw, 3rem);
  }
}

@media (min-width: 1240px) {
  .page-about .about-section:has(.about-vnote) {
    padding-right: 3rem;
  }

  .page-about .about-vnote {
    display: block;
    position: absolute;
    top: 2.2rem;
    right: 0;
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.34em;
    color: rgba(159, 176, 204, 0.55);
    pointer-events: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .partner-card,
  .page-about .pr-row,
  .page-about .tl-item,
  .page-about .about-rail-list a {
    transition: none;
  }

  .page-about .partner-card:hover,
  .page-about .partner-card:focus-within {
    transform: none;
  }
}
<<<END>>>