.page-about {
  --about-cream-soft: rgba(244, 238, 223, .74);
  --about-line-dark: rgba(244, 238, 223, .16);
  background: var(--paper);
  color: var(--ink);
  overflow-x: clip;
}

.page-about .section {
  padding: 64px 0;
}

@media (min-width: 900px) {
  .page-about .section {
    padding: 96px 0;
  }
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--green-deep);
  color: var(--paper);
  padding: 26px 0 62px;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(90deg, rgba(185, 243, 106, .055) 0 1px, transparent 1px 72px);
}

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

.page-about .about-hero .crumb-link {
  color: var(--about-cream-soft);
}

.page-about .about-hero .crumb-current {
  color: var(--neon);
}

.page-about .about-hero .eyebrow {
  color: var(--neon);
}

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

@media (min-width: 920px) {
  .page-about .hero-grid {
    grid-template-columns: 196px minmax(0, 1fr);
    gap: 52px;
    margin-top: 40px;
  }
}

.page-about .rail-list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

@media (min-width: 920px) {
  .page-about .rail-list {
    flex-direction: column;
    gap: 2px;
  }
}

.page-about .rail-list a {
  display: flex;
  gap: 9px;
  align-items: baseline;
  padding: 7px 10px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--about-cream-soft);
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--radius);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .rail-list a span {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--neon);
  letter-spacing: .06em;
}

.page-about .rail-list a:hover,
.page-about .rail-list a:focus-visible {
  color: var(--paper);
  border-color: var(--line-neon);
  background: rgba(185, 243, 106, .08);
}

.page-about .hero-main h1 {
  margin: 0;
  font-size: clamp(30px, 6.2vw, 60px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -.02em;
  max-width: 17em;
}

.page-about .hero-lead {
  margin: 22px 0 0;
  max-width: 54ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-cream-soft);
}

.page-about .hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 34px;
  padding-top: 24px;
  border-top: 1px solid var(--about-line-dark);
}

@media (min-width: 760px) {
  .page-about .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 24px;
  }
}

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

.page-about .stat-value {
  font-family: var(--mono);
  font-size: clamp(26px, 3.6vw, 38px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
}

.page-about .stat-value i {
  font-style: normal;
  font-family: var(--sans);
  font-size: .48em;
  margin-left: 2px;
}

.page-about .stat-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--moss);
}

.page-about .about-hero .stat-value {
  color: var(--neon);
}

.page-about .about-hero .stat-label {
  color: var(--about-cream-soft);
}

/* ---------- 起点 ---------- */
.page-about .origin-grid {
  display: grid;
  gap: 26px;
}

@media (min-width: 900px) {
  .page-about .origin-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 56px;
    align-items: start;
  }
}

.page-about .section-title {
  margin: 10px 0 0;
  font-size: clamp(24px, 3.8vw, 36px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.015em;
}

.page-about .origin-side .section-title {
  margin-top: 12px;
}

.page-about .origin-body p {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.85;
  max-width: 62ch;
}

.page-about .origin-figure {
  margin: 28px 0 0;
}

.page-about .media-frame {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--winter);
  overflow: hidden;
}

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

.page-about .origin-figure figcaption,
.page-about .reach-figure figcaption,
.page-about .studio-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--moss);
  max-width: 52ch;
}

/* ---------- 时间轴 ---------- */
.page-about .timeline-section {
  background: var(--paper-raised);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .timeline-head {
  max-width: 64ch;
  margin-bottom: 34px;
}

.page-about .section-lead {
  margin: 14px 0 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--moss);
  max-width: 58ch;
}

.page-about .timeline {
  position: relative;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  top: 10px;
  bottom: 12px;
  left: 4px;
  width: 1px;
  background: var(--line-strong);
}

.page-about .phase {
  position: relative;
  padding: 30px 0 30px 30px;
  border-top: 1px solid var(--line);
}

.page-about .phase:first-child {
  border-top: 0;
}

.page-about .phase::before {
  content: "";
  position: absolute;
  left: 0;
  top: 42px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 0 1px var(--paper-raised);
}

.page-about .phase--spring::before { background: var(--spring); }
.page-about .phase--summer::before { background: var(--summer); }
.page-about .phase--autumn::before { background: var(--autumn); }
.page-about .phase--winter::before { background: var(--winter); }
.page-about .phase--neon::before { background: var(--neon); }

.page-about .phase-year span {
  display: block;
  font-family: var(--mono);
  font-size: clamp(28px, 5vw, 48px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--green-deep);
}

.page-about .phase-tag {
  margin: 0;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--summer);
}

.page-about .phase-body h3 {
  margin: 8px 0 12px;
  font-size: clamp(19px, 2.4vw, 24px);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -.01em;
}

.page-about .phase-body > p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  max-width: 60ch;
}

.page-about .phase-note {
  margin: 16px 0 0;
  padding: 4px 0 4px 14px;
  border-left: 2px solid var(--neon);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--moss);
  max-width: 52ch;
}

.page-about .phase-more {
  margin-top: 16px;
  border-top: 1px dashed var(--line);
}

.page-about .phase-more summary {
  position: relative;
  cursor: pointer;
  list-style: none;
  padding: 12px 0 10px 22px;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--green-deep);
  letter-spacing: .02em;
}

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

.page-about .phase-more summary::before {
  content: "+";
  position: absolute;
  left: 2px;
  top: 10px;
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--autumn);
}

.page-about .phase-more[open] summary::before {
  content: "–";
}

.page-about .phase-more summary:hover {
  color: var(--summer);
}

.page-about .phase-more summary:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}

.page-about .phase-more p {
  margin: 0 0 10px;
  padding-left: 22px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--moss);
  max-width: 58ch;
}

@media (min-width: 900px) {
  .page-about .timeline::before {
    left: 152px;
  }

  .page-about .phase {
    display: grid;
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 0 40px;
    padding: 38px 0;
  }

  .page-about .phase::before {
    left: 148px;
    top: 50px;
  }

  .page-about .phase-year {
    padding-top: 2px;
  }
}

/* ---------- 主场半径 ---------- */
.page-about .reach {
  background: var(--green-deep);
  color: var(--paper);
}

.page-about .reach .eyebrow {
  color: var(--neon);
}

.page-about .reach-head {
  max-width: 66ch;
}

.page-about .reach .section-lead {
  color: var(--about-cream-soft);
}

.page-about .reach-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px 18px;
  margin: 34px 0 0;
  padding: 26px 0;
  border-top: 1px solid var(--about-line-dark);
  border-bottom: 1px solid var(--about-line-dark);
}

@media (min-width: 760px) {
  .page-about .reach-figures {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .reach-figures {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
}

.page-about .reach .stat-value {
  color: var(--neon);
}

.page-about .reach .stat-label {
  color: var(--about-cream-soft);
}

.page-about .reach-body {
  display: grid;
  gap: 30px;
  margin-top: 36px;
}

@media (min-width: 960px) {
  .page-about .reach-body {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 44px;
    align-items: start;
  }
}

.page-about .city-hint {
  margin: 0 0 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--about-cream-soft);
}

.page-about .city-map {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-line-dark);
  border: 1px solid var(--about-line-dark);
}

@media (min-width: 640px) {
  .page-about .city-map {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .city {
  background: var(--green-deep);
  padding: 14px 12px;
  transition: background var(--dur) var(--ease);
}

.page-about .city-label {
  display: block;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--paper);
}

.page-about .city-tip {
  display: block;
  margin-top: 5px;
  font-size: 12px;
  line-height: 1.5;
  color: rgba(185, 243, 106, .82);
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-about .city:hover,
.page-about .city:focus,
.page-about .city:focus-within {
  background: rgba(185, 243, 106, .1);
}

.page-about .city:hover .city-tip,
.page-about .city:focus .city-tip,
.page-about .city:focus-within .city-tip {
  max-height: 48px;
  opacity: 1;
}

.page-about .city:focus {
  outline: 1px solid var(--neon);
  outline-offset: -1px;
}

@media (max-width: 699px) {
  .page-about .city-tip {
    max-height: none;
    opacity: 1;
  }
}

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

.page-about .reach-figure figcaption {
  color: var(--about-cream-soft);
}

.page-about .reach-team {
  display: grid;
  gap: 18px;
  margin-top: 38px;
  padding-top: 24px;
  border-top: 1px solid var(--about-line-dark);
}

@media (min-width: 860px) {
  .page-about .reach-team {
    grid-template-columns: 160px 160px minmax(0, 1fr);
    align-items: center;
    gap: 32px;
  }
}

.page-about .reach-team > div {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .team-num {
  font-family: var(--mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
}

.page-about .team-label {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--about-cream-soft);
}

.page-about .reach-team p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--about-cream-soft);
  max-width: 54ch;
}

/* ---------- 内容与数据 ---------- */
.page-about .studio-grid {
  display: grid;
  gap: 34px;
}

@media (min-width: 960px) {
  .page-about .studio-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: start;
  }
}

.page-about .studio-text > p {
  margin: 16px 0 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--moss);
  max-width: 56ch;
}

.page-about .studio-steps {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .studio-steps li {
  position: relative;
  padding: 16px 0 16px 46px;
  border-top: 1px solid var(--line);
}

.page-about .step-no {
  position: absolute;
  left: 0;
  top: 16px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--autumn);
  letter-spacing: .04em;
}

.page-about .studio-steps h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -.01em;
}

.page-about .studio-steps p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--moss);
  max-width: 56ch;
}

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

@media (min-width: 960px) {
  .page-about .studio-figure {
    position: sticky;
    top: 96px;
  }
}

/* ---------- 看台文化 ---------- */
.page-about .stands {
  background: var(--winter);
}

.page-about .stands-grid {
  display: grid;
  gap: 30px;
}

@media (min-width: 920px) {
  .page-about .stands-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 56px;
    align-items: start;
  }
}

.page-about .stands-side p {
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--green-deep);
  max-width: 46ch;
}

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

.page-about .stand-list li {
  padding: 22px 0;
  border-top: 1px solid rgba(16, 19, 18, .18);
}

.page-about .stand-list li:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .stand-no {
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--spring);
}

.page-about .stand-list h3 {
  margin: 8px 0 8px;
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--green-deep);
}

.page-about .stand-list p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: #2C443C;
  max-width: 58ch;
}

/* ---------- 下一步 ---------- */
.page-about .next {
  background: var(--green-deep);
  color: var(--paper);
}

.page-about .next-inner {
  display: grid;
  gap: 30px;
}

@media (min-width: 920px) {
  .page-about .next-inner {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 32px 56px;
    align-items: start;
  }

  .page-about .next-lead {
    grid-row: span 2;
  }

  .page-about .next-actions {
    grid-column: 2;
  }
}

.page-about .next .eyebrow {
  color: var(--neon);
}

.page-about .next .section-title {
  color: var(--paper);
}

.page-about .next-lead p {
  margin: 18px 0 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--about-cream-soft);
  max-width: 44ch;
}

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

.page-about .next-list li {
  padding: 16px 0 16px 18px;
  border-top: 1px solid var(--about-line-dark);
  border-left: 2px solid transparent;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .next-list li:hover {
  border-left-color: var(--neon);
  background: rgba(185, 243, 106, .06);
}

.page-about .next-list h3 {
  margin: 0 0 6px;
  font-size: 16.5px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-about .next-list p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-cream-soft);
  max-width: 58ch;
}

.page-about .next-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  padding-top: 22px;
  border-top: 1px solid var(--about-line-dark);
}

.page-about .next-actions .btn-ghost {
  color: var(--paper);
  border-color: var(--line-neon);
}

.page-about .next-actions .btn-ghost:hover {
  background: rgba(185, 243, 106, .12);
}

.page-about .next-actions p {
  margin: 0;
  flex: 1 1 260px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--about-cream-soft);
}

.page-about .next-link {
  color: var(--neon);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
}

.page-about .next-link:hover {
  text-decoration-color: var(--amber);
}
<<<END>>>