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

.page-about .crumbs {
  padding-top: clamp(14px, 2vw, 22px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding-block: clamp(20px, 3vw, 34px) clamp(36px, 6vw, 82px);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(58% 52% at 92% 0%, rgba(165, 107, 255, 0.22), transparent 72%),
    radial-gradient(48% 46% at 0% 100%, rgba(67, 245, 200, 0.13), transparent 70%);
  pointer-events: none;
}

.page-about .hero-grid {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
}

.page-about .hero-title {
  margin: 12px 0 18px;
  font-size: clamp(2rem, 6.6vw, 4.5rem);
  line-height: 1;
  font-weight: 900;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.page-about .hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .hero-index {
  border: 1px solid var(--line);
  border-top: 2px solid var(--mint);
  background: linear-gradient(180deg, rgba(18, 23, 34, 0.92), rgba(11, 13, 18, 0.92));
  padding: clamp(16px, 2.4vw, 28px);
}

.page-about .index-label {
  margin: 0;
  color: var(--violet);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.page-about .about-index {
  margin: 10px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-index li + li {
  border-top: 1px solid var(--line);
}

.page-about .about-index a {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 12px;
  padding: 13px 6px;
  text-decoration: none;
  color: var(--cream);
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  color: var(--mint);
  background: rgba(67, 245, 200, 0.06);
}

.page-about .about-index .idx {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--violet);
  padding-top: 3px;
}

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

.page-about .ix-label {
  display: block;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
}

.page-about .ix-note {
  display: block;
  margin-top: 4px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 通用区块 ---------- */
.page-about .about-block {
  padding-block: clamp(40px, 6vw, 88px);
  border-bottom: 1px solid var(--line);
}

.page-about .block-last {
  border-bottom: 0;
}

.page-about .block-head {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: clamp(22px, 3.5vw, 40px);
}

.page-about .block-title {
  margin: 0;
  font-size: clamp(1.55rem, 4.2vw, 2.8rem);
  line-height: 1.08;
  font-weight: 900;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

.page-about .media-caption {
  margin-top: 10px;
}

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

.page-about .keyword-index {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .keyword-index li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 13.5px;
  color: var(--mist);
}

.page-about .keyword-index li span:last-child {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--amber);
  white-space: nowrap;
}

.page-about .aside-note {
  margin: 18px 0 0;
  font-size: 13.5px;
  color: var(--mist);
}

.page-about .aside-note a {
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid rgba(67, 245, 200, 0.4);
}

.page-about .aside-note a:hover {
  border-bottom-color: var(--mint);
}

.page-about .narrative-figure {
  margin: 0;
}

.page-about .narrative-body p {
  max-width: 66ch;
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .narrative-body strong {
  color: var(--cream);
  font-weight: 700;
}

.page-about .pull-quote {
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding-left: 18px;
  border-left: 3px solid var(--mint);
  font-size: clamp(1.05rem, 2.4vw, 1.35rem);
  line-height: 1.55;
  font-weight: 700;
  color: var(--cream);
}

/* ---------- 里程碑 ---------- */
.page-about .milestone-figure {
  margin: 0 0 clamp(26px, 4vw, 44px);
}

.page-about .track {
  position: relative;
  display: grid;
  gap: 22px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .track li {
  position: relative;
  padding-left: 26px;
  border-left: 1px solid var(--line);
}

.page-about .track li::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 7px;
  width: 9px;
  height: 9px;
  background: var(--mint);
}

.page-about .track li:nth-child(2)::before {
  background: var(--violet);
}

.page-about .track li:nth-child(3)::before {
  background: var(--amber);
}

.page-about .track li:nth-child(4)::before {
  background: var(--cream);
}

.page-about .phase {
  margin: 0 0 8px;
  color: var(--amber);
  letter-spacing: 0.08em;
}

.page-about .ms-title {
  margin: 0 0 8px;
  font-size: 1.05rem;
  font-weight: 800;
  line-height: 1.4;
  color: var(--cream);
}

.page-about .ms-text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  gap: clamp(22px, 3vw, 40px);
}

.page-about .team-figure {
  margin: 0;
}

.page-about .team-cards {
  display: grid;
  gap: 14px;
}

.page-about .team-card {
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 18px;
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease), background 0.25s var(--ease);
}

.page-about .team-card:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 2px;
}

.page-about .team-card .tag {
  display: inline-block;
  margin-bottom: 10px;
}

.page-about .team-name {
  margin: 0 0 6px;
  font-size: 1.02rem;
  font-weight: 800;
  line-height: 1.4;
}

.page-about .team-role {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .team-more {
  max-height: 0;
  margin: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mint);
  transition: max-height 0.32s var(--ease), opacity 0.32s var(--ease), margin 0.32s var(--ease);
}

.page-about .stat-strip {
  display: grid;
  gap: 1px;
  margin-top: clamp(20px, 3vw, 30px);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .stat-cell {
  background: var(--ink);
  padding: 16px 18px;
}

.page-about .stat-num {
  display: block;
  font-size: clamp(1.6rem, 4vw, 2.3rem);
  font-weight: 900;
  line-height: 1;
  color: var(--mint);
  letter-spacing: -0.01em;
}

.page-about .stat-cap {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--mist);
}

/* ---------- 生态 ---------- */
.page-about .eco-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .eco-list li {
  display: grid;
  gap: 8px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .eco-no {
  color: var(--violet);
  letter-spacing: 0.08em;
}

.page-about .eco-name {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--cream);
}

.page-about .eco-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .scope-note {
  margin-top: clamp(24px, 4vw, 40px);
  padding: clamp(20px, 3vw, 32px);
  border: 1px solid var(--line);
  border-left: 3px solid var(--amber);
  background: var(--panel);
}

.page-about .scope-label {
  margin: 0 0 12px;
  color: var(--amber);
  letter-spacing: 0.1em;
}

.page-about .scope-note p:not(.scope-label) {
  max-width: 70ch;
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 承诺与联系 ---------- */
.page-about .promise {
  display: grid;
  gap: clamp(22px, 3.4vw, 40px);
  padding: clamp(22px, 4vw, 46px);
  background: var(--espresso);
  border: 1px solid var(--line);
  border-top: 2px solid var(--violet);
}

.page-about .promise-main p {
  max-width: 62ch;
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .promise-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-about .promise-side {
  padding-top: clamp(18px, 3vw, 26px);
  border-top: 1px solid var(--line);
}

.page-about .side-label {
  margin: 0 0 14px;
  color: var(--mint);
  letter-spacing: 0.1em;
}

.page-about .contact-list {
  margin: 0;
}

.page-about .contact-list > div {
  padding: 12px 0;
  border-bottom: 1px dashed var(--line);
}

.page-about .contact-list dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--amber);
  margin-bottom: 6px;
}

.page-about .contact-list dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--cream);
  word-break: break-word;
}

.page-about .side-note {
  margin: 16px 0 0;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--mist);
}

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

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

@media (min-width: 820px) {
  .page-about .eco-list li {
    grid-template-columns: 128px minmax(0, 0.6fr) minmax(0, 1.4fr);
    align-items: baseline;
    gap: 0 26px;
    padding: 24px 0;
  }

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

  .page-about .track::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 9px;
    height: 1px;
    background: linear-gradient(90deg, var(--mint), var(--violet), var(--amber), var(--cream));
  }

  .page-about .track li {
    padding: 36px 20px 0 0;
    border-left: 0;
  }

  .page-about .track li::before {
    left: 0;
    top: 5px;
  }

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

@media (hover: hover) {
  .page-about .team-card:hover {
    border-color: var(--mint);
    background: #141b28;
    transform: translateY(-2px);
  }

  .page-about .team-card:hover .team-more,
  .page-about .team-card:focus-within .team-more {
    max-height: 140px;
    margin-top: 10px;
    opacity: 1;
  }
}

@media (hover: none) {
  .page-about .team-more {
    max-height: none;
    margin-top: 10px;
    opacity: 1;
  }
}

@media (min-width: 960px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-about .narrative-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  }

  .page-about .narrative-aside {
    position: sticky;
    top: calc(var(--header-h) + 26px);
    align-self: start;
  }
}

@media (min-width: 980px) {
  .page-about .team-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-about .team-figure {
    position: sticky;
    top: calc(var(--header-h) + 26px);
  }

  .page-about .promise {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .promise-side {
    padding-top: 0;
    padding-left: clamp(20px, 3vw, 34px);
    border-top: 0;
    border-left: 1px solid var(--line);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card,
  .page-about .team-more,
  .page-about .about-index a {
    transition: none;
  }
}
<<<END>>>