.page-about {
  --about-rail: 148px;
  --about-gap: clamp(20px, 4vw, 40px);
  background: var(--ink);
  color: var(--paper);
}

.page-about .about-text {
  max-width: 42ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--paper-dim);
  margin: 0 0 18px;
}

.page-about .about-section {
  padding: clamp(48px, 8vw, 96px) 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-section .lede {
  max-width: 46ch;
  margin-bottom: 28px;
}

.page-about .about-section .eyebrow {
  margin-bottom: 14px;
}

.page-about .about-section .section-title {
  margin-bottom: 20px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: calc(var(--header-h) + 28px) 0 clamp(48px, 7vw, 76px);
  background:
    radial-gradient(120% 86% at 86% -6%, rgba(200, 255, 62, 0.16), transparent 56%),
    radial-gradient(90% 70% at -6% 104%, rgba(46, 107, 82, 0.42), transparent 62%),
    var(--ink);
  overflow: hidden;
}

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(22px, 4vw, 40px);
}

.page-about .about-hero-grid {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-hero-copy .eyebrow {
  margin-bottom: 16px;
}

.page-about .about-hero-copy .display-title {
  margin: 0 0 20px;
  font-family: var(--font-sans);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.04;
  font-size: clamp(2.4rem, 8vw, 4.6rem);
  color: var(--paper);
}

.page-about .about-hero-copy .display-title::after {
  content: "";
  display: block;
  width: 72px;
  height: 4px;
  margin-top: 20px;
  background: var(--lime);
}

.page-about .about-hero-copy .lede {
  max-width: 40ch;
  margin: 0 0 26px;
  color: var(--paper-dim);
}

.page-about .about-hero-points {
  list-style: none;
  margin: 0 0 30px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-hero-points li {
  position: relative;
  padding-left: 20px;
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--paper-soft);
}

.page-about .about-hero-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.66em;
  width: 8px;
  height: 2px;
  background: var(--orange);
}

.page-about .about-hero-points strong {
  color: var(--lime);
  font-weight: 700;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero-visual {
  position: relative;
  margin: 0;
  padding: 10px;
  border: 1px solid var(--line);
  background: var(--ink-2);
  box-shadow: 14px 14px 0 rgba(46, 107, 82, 0.28);
}

.page-about .about-hero-visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border: 1px solid var(--line-soft);
}

.page-about .about-hero-visual .media-caption {
  margin-top: 10px;
  font-size: 0.76rem;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 目录 ---------- */
.page-about .about-toc {
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  background: var(--ink-2);
  padding: 16px 0;
}

.page-about .about-toc-hint {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .about-toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.page-about .about-toc-list a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 4px 0;
  font-size: 0.88rem;
  color: var(--paper-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .about-toc-list a span {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--amber);
}

.page-about .about-toc-list a:hover,
.page-about .about-toc-list a:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

/* ---------- 编辑部双栏 ---------- */
.page-about .about-editorial {
  display: grid;
  gap: 18px;
}

.page-about .about-editorial-rail {
  display: none;
}

.page-about .about-figure {
  margin: 26px 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  background: var(--ink-2);
  object-fit: cover;
}

.page-about .about-figure .media-caption {
  margin-top: 10px;
  padding-left: 12px;
  border-left: 2px solid var(--orange);
  font-size: 0.8rem;
  line-height: 1.65;
  color: var(--mist);
}

.page-about .about-callout {
  margin-top: 28px;
  padding: 20px 22px;
  border-left: 3px solid var(--orange);
  background: rgba(255, 138, 61, 0.07);
}

.page-about .about-callout p {
  margin: 0;
  max-width: 44ch;
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--paper);
}

/* ---------- 版本演进 ---------- */
.page-about .about-section--panel {
  background: linear-gradient(180deg, var(--ink-2), rgba(16, 35, 28, 0.6));
}

.page-about .about-timeline {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
}

.page-about .about-timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  padding-bottom: 14px;
}

.page-about .about-timeline-item::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 30px;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, rgba(200, 255, 62, 0.5), rgba(111, 119, 114, 0.2));
}

.page-about .about-timeline-item:last-child::before {
  display: none;
}

.page-about .about-timeline-dot {
  width: 12px;
  height: 12px;
  margin: 15px 0 0 14px;
  border: 2px solid var(--lime);
  border-radius: 50%;
  background: var(--ink);
}

.page-about .about-phase {
  border: 1px solid var(--line-soft);
  background: rgba(8, 19, 15, 0.72);
  transition: border-color 180ms var(--ease), background-color 180ms var(--ease);
}

.page-about .about-phase:hover {
  border-color: var(--line);
}

.page-about .about-phase > summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-phase > summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  line-height: 1;
  color: var(--lime);
}

.page-about .about-phase[open] > summary::after {
  content: "−";
}

.page-about .about-phase[open] {
  border-color: rgba(200, 255, 62, 0.42);
  background: rgba(16, 35, 28, 0.92);
}

.page-about .about-phase-num {
  font-family: var(--font-mono);
  font-size: 0.86rem;
  letter-spacing: 0.14em;
  color: var(--lime);
}

.page-about .about-phase-title {
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .about-phase-body {
  padding: 0 18px 18px;
  border-top: 1px dashed var(--line-soft);
  padding-top: 14px;
}

.page-about .about-phase-body p {
  margin: 0 0 10px;
  max-width: 46ch;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--paper-soft);
}

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

/* ---------- 团队 ---------- */
.page-about .about-team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 24px;
}

.page-about .about-role {
  position: relative;
  padding: 22px 18px 20px;
  border: 1px solid var(--line-soft);
  background: var(--ink-2);
  overflow: hidden;
  transition: transform 200ms var(--ease), border-color 200ms var(--ease);
}

.page-about .about-role::after {
  content: "";
  position: absolute;
  right: -18px;
  top: -18px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--ink);
  box-shadow: 0 0 0 1px var(--line-soft);
}

.page-about .about-role:hover {
  transform: translateY(-3px);
  border-color: var(--lime);
}

.page-about .about-role-count {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 1.9rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--lime);
}

.page-about .about-role h3 {
  margin: 0 0 8px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-role p {
  margin: 0;
  font-size: 0.87rem;
  line-height: 1.75;
  color: var(--paper-soft);
}

.page-about .about-observer {
  padding: 24px 20px;
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--teal);
  background: linear-gradient(120deg, rgba(46, 107, 82, 0.34), rgba(16, 35, 28, 0.2));
}

.page-about .about-observer-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 12px;
}

.page-about .about-observer-num {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 5vw, 2.4rem);
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
}

.page-about .about-observer-head h3 {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-observer p {
  margin: 0 0 14px;
  max-width: 52ch;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--paper-dim);
}

.page-about .about-inline-link {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 255, 62, 0.5);
  padding-bottom: 2px;
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  border-bottom-color: var(--orange);
  color: var(--orange);
}

/* ---------- 流程 ---------- */
.page-about .about-section--process {
  background:
    radial-gradient(80% 60% at 100% 0%, rgba(46, 107, 82, 0.34), transparent 60%),
    var(--ink);
}

.page-about .about-process-grid {
  display: grid;
  gap: clamp(28px, 5vw, 48px);
}

.page-about .about-flow {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
}

.page-about .about-flow-step {
  position: relative;
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 14px;
  padding-bottom: 22px;
}

.page-about .about-flow-step::before {
  content: "";
  position: absolute;
  left: 23px;
  top: 42px;
  bottom: 4px;
  width: 0;
  border-left: 1px dashed var(--line);
}

.page-about .about-flow-step:last-child::before {
  display: none;
}

.page-about .about-flow-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 34px;
  background: var(--teal);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.1em;
}

.page-about .about-flow-body h3 {
  margin: 4px 0 6px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-flow-body p {
  margin: 0;
  max-width: 40ch;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--paper-soft);
}

.page-about .about-process-side {
  display: grid;
  gap: 20px;
}

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

.page-about .about-figure--square img {
  aspect-ratio: 1 / 1;
}

.page-about .about-index-card {
  padding: 22px 20px;
  border: 1px solid var(--line);
  background: var(--ink-2);
}

.page-about .about-index-card h3 {
  margin: 0 0 16px;
  font-size: 0.98rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--lime);
}

.page-about .about-index-list {
  margin: 0 0 18px;
}

.page-about .about-index-row {
  padding: 12px 0;
  border-top: 1px dashed var(--line-soft);
}

.page-about .about-index-row:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-index-row dt {
  margin-bottom: 5px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--amber);
}

.page-about .about-index-row dd {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.75;
  color: var(--paper-soft);
}

/* ---------- 节奏 ---------- */
.page-about .about-section--cadence {
  background: linear-gradient(180deg, rgba(16, 35, 28, 0.9), var(--ink));
}

.page-about .about-cadence {
  list-style: none;
  margin: 0 0 28px;
  padding: 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-cadence-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-cadence-what {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-cadence-when {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  color: var(--lime);
}

.page-about .about-cadence-note {
  font-size: 0.82rem;
  line-height: 1.65;
  color: var(--mist);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  margin-bottom: 24px;
}

.page-about .about-stats .stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 16px;
  background: var(--ink-2);
}

.page-about .about-stats .stat-num {
  font-family: var(--font-mono);
  font-size: clamp(1.7rem, 4.4vw, 2.5rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--lime);
}

.page-about .about-stats .stat-label {
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .about-inline-cta {
  margin: 0;
  max-width: 58ch;
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--paper-soft);
}

.page-about .about-inline-cta a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 255, 62, 0.45);
}

.page-about .about-inline-cta a:hover,
.page-about .about-inline-cta a:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* ---------- 合作 ---------- */
.page-about .about-partner-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 32px;
}

.page-about .about-partner {
  padding: 20px 18px;
  border: 1px solid var(--line-soft);
  border-top: 3px solid var(--amber);
  background: var(--ink-2);
}

.page-about .about-partner h3 {
  margin: 0 0 8px;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-partner p {
  margin: 0;
  font-size: 0.87rem;
  line-height: 1.75;
  color: var(--paper-soft);
}

.page-about .about-cta {
  display: grid;
  gap: 22px;
  padding: clamp(24px, 4vw, 36px);
  border: 1px solid var(--line);
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(200, 255, 62, 0.14), transparent 62%),
    var(--ink-2);
}

.page-about .about-cta-copy h3 {
  margin: 0 0 12px;
  font-size: clamp(1.15rem, 2.6vw, 1.5rem);
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1.35;
  color: var(--paper);
}

.page-about .about-cta-copy p {
  margin: 0;
  max-width: 54ch;
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--paper-soft);
}

.page-about .about-cta-copy a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 255, 62, 0.45);
}

.page-about .about-cta-copy a:hover,
.page-about .about-cta-copy a:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-cadence-row {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr) minmax(0, 1.6fr);
    align-items: baseline;
    gap: 16px;
  }

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

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(32px, 5vw, 64px);
  }

  .page-about .about-editorial {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 36px;
  }

  .page-about .about-editorial-rail {
    display: block;
    position: relative;
  }

  .page-about .about-editorial-rail .vertical-note {
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.32em;
    text-transform: uppercase;
    color: var(--mist);
    padding-top: 6px;
    border-left: 1px solid var(--line-soft);
    padding-left: 10px;
  }

  .page-about .about-process-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

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

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
  }
}

@media (min-width: 1000px) {
  .page-about .about-team-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .about-role:nth-child(1),
  .page-about .about-role:nth-child(2) {
    grid-column: span 3;
  }

  .page-about .about-role:nth-child(3),
  .page-about .about-role:nth-child(4),
  .page-about .about-role:nth-child(5) {
    grid-column: span 2;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-role,
  .page-about .about-toc-list a,
  .page-about .about-phase {
    transition: none;
  }

  .page-about .about-role:hover {
    transform: none;
  }
}
<<<END>>>