.page-about {
  --about-line: rgba(201, 162, 75, 0.42);
  --about-line-soft: rgba(201, 162, 75, 0.18);
  --about-shadow: 0 20px 44px -30px rgba(14, 42, 34, 0.6);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-about .about-top {
  padding: 18px 0 0;
}

.page-about .about-topbar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
}

.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--ink-soft);
}

.page-about .breadcrumb a {
  color: var(--ink-soft);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

.page-about .breadcrumb a:hover {
  color: var(--cinnabar);
}

.page-about .breadcrumb span[aria-hidden] {
  color: var(--gold);
}

.page-about .about-jump {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--green);
  text-decoration: none;
  background: var(--paper-2);
  border: 1px solid var(--about-line);
  border-radius: 999px;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .about-jump::after {
  content: "↓";
  color: var(--cinnabar);
}

.page-about .about-jump:hover {
  background: var(--gold-soft);
  border-color: var(--gold);
}

.page-about .about-jump:focus-visible {
  outline: 2px solid var(--celadon);
  outline-offset: 2px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 28px 0 68px;
}

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

.page-about .about-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cinnabar);
}

.page-about .about-kicker::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--cinnabar);
}

.page-about .about-title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 9vw, 66px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--green);
}

.page-about .about-title::after {
  content: "";
  display: block;
  width: 76px;
  height: 3px;
  margin: 20px 0 0;
  background: var(--gold);
}

.page-about .about-lead {
  margin: 20px 0 0;
  max-width: 32em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .about-facts {
  display: grid;
  gap: 14px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-facts li {
  padding-left: 12px;
  border-left: 2px solid var(--gold);
}

.page-about .fact-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 21px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--green);
}

.page-about .fact-label {
  font-size: 12.5px;
  letter-spacing: 0.03em;
  color: var(--ink-soft);
}

.page-about .about-hero-media {
  position: relative;
  margin: 0;
  aspect-ratio: 4 / 3;
  background: var(--green);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
  box-shadow: var(--about-shadow);
}

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

.page-about .about-cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  margin: 0;
  padding: 14px 16px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--white);
  background: linear-gradient(180deg, rgba(14, 42, 34, 0) 0%, rgba(14, 42, 34, 0.86) 70%);
}

/* ---------- 章节通用 ---------- */
.page-about .about-head {
  max-width: 46em;
}

.page-about .about-num {
  display: inline-block;
  margin: 0 0 14px;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--cinnabar);
  border: 1px solid rgba(181, 52, 42, 0.28);
  border-radius: 3px;
}

.page-about .about-num--light {
  color: var(--gold);
  border-color: var(--about-line);
}

.page-about .about-h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 4.4vw, 36px);
  line-height: 1.26;
  letter-spacing: -0.01em;
  color: var(--green);
}

.page-about .about-h2--light {
  color: var(--paper);
}

.page-about .about-sub {
  margin: 14px 0 0;
  max-width: 36em;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .about-sub--light {
  color: rgba(250, 246, 238, 0.76);
}

.page-about .about-inline-link {
  color: var(--cinnabar);
  text-decoration: none;
  border-bottom: 1px solid rgba(181, 52, 42, 0.4);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-inline-link:hover {
  color: var(--celadon);
  border-bottom-color: var(--celadon);
}

/* ---------- 编年时间线 ---------- */
.page-about .about-timeline {
  padding: 6px 0 76px;
}

.page-about .about-track {
  position: relative;
  margin: 42px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-track::before {
  content: "";
  position: absolute;
  top: 4px;
  bottom: 90px;
  left: 21px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold) 0%, var(--about-line-soft) 100%);
}

.page-about .tl-node {
  position: relative;
  padding: 0 0 38px 58px;
}

.page-about .tl-node:focus-visible {
  outline: 2px solid var(--celadon);
  outline-offset: 4px;
}

.page-about .tl-dot {
  position: absolute;
  left: 0;
  top: 0;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 700;
  color: var(--cinnabar);
  background: var(--paper);
  border: 1px solid var(--gold);
  border-radius: 50%;
  transition: background 0.24s var(--ease), color 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-about .tl-node:hover .tl-dot,
.page-about .tl-node:focus-within .tl-dot {
  color: var(--white);
  background: var(--cinnabar);
  border-color: var(--cinnabar);
}

.page-about .tl-title {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 18px;
  line-height: 1.45;
  color: var(--green);
}

.page-about .tl-text {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .tl-more {
  max-height: 0;
  margin: 0;
  padding-left: 0;
  overflow: hidden;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--ink-soft);
  opacity: 0;
  border-left: 2px solid transparent;
  transition: max-height 0.32s var(--ease), opacity 0.24s var(--ease),
    margin 0.32s var(--ease), padding 0.32s var(--ease), border-color 0.32s var(--ease);
}

.page-about .tl-node:hover .tl-more,
.page-about .tl-node:focus-within .tl-more {
  max-height: 180px;
  margin-top: 10px;
  padding-left: 12px;
  opacity: 1;
  border-left-color: var(--gold-soft);
}

.page-about .tl-more .about-inline-link {
  font-size: 13.5px;
}

.page-about .tl-end {
  display: grid;
  place-items: center;
  padding: 0 0 0 58px;
  color: var(--gold);
}

/* ---------- 三组分班 ---------- */
.page-about .about-crew {
  padding: 72px 0 80px;
  background: var(--green);
  color: var(--paper);
}

.page-about .crew-head {
  display: grid;
  gap: 30px;
  align-items: end;
}

.page-about .crew-media {
  position: relative;
  margin: 0;
  aspect-ratio: 16 / 10;
  background: var(--green-2);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 18px 100%, 0 calc(100% - 18px));
}

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

.page-about .about-cap--light {
  background: linear-gradient(180deg, rgba(23, 69, 58, 0) 0%, rgba(23, 69, 58, 0.9) 72%);
}

.page-about .crew-grid {
  display: grid;
  gap: 16px;
  margin-top: 38px;
}

.page-about .crew-card {
  position: relative;
  padding: 26px 22px 22px;
  background: rgba(250, 246, 238, 0.05);
  border: 1px solid rgba(201, 162, 75, 0.26);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
  transition: background 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-about .crew-card:hover {
  background: rgba(250, 246, 238, 0.09);
  border-color: var(--gold);
}

.page-about .crew-index {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-about .crew-count {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(46px, 9vw, 68px);
  font-weight: 700;
  line-height: 1;
  color: var(--cinnabar);
}

.page-about .crew-count span {
  margin-left: 6px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  color: rgba(250, 246, 238, 0.66);
}

.page-about .crew-name {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .crew-text {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(250, 246, 238, 0.74);
}

.page-about .crew-more {
  margin-top: 18px;
  padding-top: 12px;
  border-top: 1px solid rgba(201, 162, 75, 0.26);
}

.page-about .crew-more summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 13px;
  color: var(--gold);
  cursor: pointer;
  list-style: none;
}

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

.page-about .crew-more summary::after {
  content: "＋";
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--gold);
  transition: transform 0.24s var(--ease);
}

.page-about .crew-more[open] summary::after {
  content: "−";
  transform: rotate(180deg);
}

.page-about .crew-more summary:focus-visible {
  outline: 2px solid var(--celadon);
  outline-offset: 3px;
}

.page-about .crew-more p {
  margin: 12px 0 0;
  font-size: 13.5px;
  line-height: 1.78;
  color: rgba(250, 246, 238, 0.78);
}

/* ---------- 在地合作 ---------- */
.page-about .about-local {
  padding: 78px 0;
  background: var(--paper-2);
}

.page-about .local-grid {
  display: grid;
  gap: 34px;
}

.page-about .local-nums {
  display: grid;
  gap: 14px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .local-nums li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--about-line);
}

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

.page-about .local-num-label {
  font-size: 13.5px;
  color: var(--ink-soft);
}

.page-about .local-stack {
  display: grid;
  gap: 18px;
}

.page-about .local-card {
  position: relative;
  margin: 0;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
  box-shadow: var(--about-shadow);
}

.page-about .local-card--tall {
  aspect-ratio: 4 / 3;
  background: var(--green-2);
}

.page-about .local-card--tall img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-about .local-card--short {
  padding: 24px 22px;
  background: var(--gold-soft);
  border: 1px solid var(--gold);
}

.page-about .local-quote {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 22px;
  line-height: 1.4;
  color: var(--green);
}

.page-about .local-quote-note {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.72;
  color: var(--ink-soft);
}

/* ---------- 版本节奏 ---------- */
.page-about .about-rhythm {
  padding: 78px 0;
  background: var(--paper);
}

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

.page-about .rhythm-list {
  display: grid;
  gap: 12px;
}

.page-about .rhythm-item {
  padding: 18px 20px;
  background: var(--paper);
  border: 1px solid rgba(201, 162, 75, 0.34);
  border-left: 3px solid var(--gold);
  transition: background 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-about .rhythm-item[open] {
  background: var(--gold-soft);
  border-left-color: var(--cinnabar);
}

.page-about .rhythm-item summary {
  cursor: pointer;
  list-style: none;
}

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

.page-about .rhythm-item summary:focus-visible {
  outline: 2px solid var(--celadon);
  outline-offset: 4px;
}

.page-about .rhythm-tag {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cinnabar);
}

.page-about .rhythm-title {
  display: block;
  margin-top: 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 17px;
  line-height: 1.45;
  color: var(--green);
}

.page-about .rhythm-item p {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.82;
  color: var(--ink-soft);
}

/* ---------- 线下雅集 ---------- */
.page-about .about-gather {
  padding: 74px 0 78px;
  background: var(--green);
  color: var(--paper);
}

.page-about .about-gather .about-h2 {
  color: var(--paper);
}

.page-about .about-gather .about-sub {
  color: rgba(250, 246, 238, 0.76);
}

.page-about .gather-list {
  display: grid;
  gap: 14px;
  margin: 38px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .gather-item {
  padding: 22px 20px;
  background: rgba(250, 246, 238, 0.04);
  border-top: 1px solid rgba(201, 162, 75, 0.34);
  transition: background 0.24s var(--ease);
}

.page-about .gather-item:hover {
  background: rgba(250, 246, 238, 0.09);
}

.page-about .gather-num {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .gather-city {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 24px;
  letter-spacing: 0.04em;
  color: var(--paper);
}

.page-about .gather-item p {
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: rgba(250, 246, 238, 0.72);
}

.page-about .gather-note {
  margin: 26px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(250, 246, 238, 0.76);
}

.page-about .about-gather .about-inline-link {
  color: var(--gold);
  border-bottom-color: rgba(201, 162, 75, 0.5);
}

.page-about .about-gather .about-inline-link:hover {
  color: var(--celadon);
  border-bottom-color: var(--celadon);
}

/* ---------- 结尾 ---------- */
.page-about .about-next {
  padding: 64px 0 76px;
  background: var(--green-2);
  color: var(--paper);
}

.page-about .about-next-inner {
  display: grid;
  gap: 26px;
}

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

.page-about .about-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 24px;
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  border-radius: 2px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  transition: background 0.22s var(--ease), color 0.22s var(--ease), border-color 0.22s var(--ease);
}

.page-about .about-btn--primary {
  background: var(--cinnabar);
  color: var(--white);
}

.page-about .about-btn--primary:hover {
  background: var(--cinnabar-deep);
}

.page-about .about-btn--ghost {
  color: var(--paper);
  border: 1px solid var(--gold);
}

.page-about .about-btn--ghost:hover {
  background: var(--gold);
  color: var(--green);
}

.page-about .about-btn:focus-visible {
  outline: 2px solid var(--celadon);
  outline-offset: 3px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .about-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .local-nums {
    grid-template-columns: 1fr 1fr;
    gap: 18px;
  }

  .page-about .local-nums li {
    display: block;
    border-bottom: 0;
    border-left: 2px solid var(--gold);
    padding: 0 0 0 12px;
  }

  .page-about .local-num {
    display: block;
    margin-bottom: 6px;
  }

  .page-about .gather-list {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 681px) {
  .page-about .local-stack {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }

  .page-about .local-card--short {
    margin-top: 18%;
  }

  .page-about .about-next-inner {
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 36px;
  }
}

@media (min-width: 861px) {
  .page-about .about-hero {
    padding: 36px 0 84px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: 5fr 7fr;
    align-items: end;
    gap: 58px;
  }

  .page-about .about-hero-media {
    aspect-ratio: 3 / 4;
  }

  /* 时间线中轴交替 */
  .page-about .about-track::before {
    left: 50%;
  }

  .page-about .tl-node {
    display: grid;
    grid-template-columns: 1fr 96px 1fr;
    align-items: start;
    padding: 0;
  }

  .page-about .tl-dot {
    position: static;
    grid-column: 2;
    grid-row: 1;
    justify-self: center;
    width: 64px;
    height: 64px;
    margin-top: 2px;
    font-size: 13.5px;
  }

  .page-about .tl-body {
    grid-column: 3;
    padding: 6px 0 60px 14px;
  }

  .page-about .tl-node:nth-child(odd) .tl-body {
    grid-column: 1;
    grid-row: 1;
    padding: 6px 14px 60px 0;
    text-align: right;
  }

  .page-about .tl-node:nth-child(odd) .tl-more {
    border-left: 0;
    border-right: 2px solid transparent;
    padding-left: 0;
  }

  .page-about .tl-node:nth-child(odd):hover .tl-more,
  .page-about .tl-node:nth-child(odd):focus-within .tl-more {
    padding-right: 12px;
    border-right-color: var(--gold-soft);
  }

  .page-about .tl-end {
    grid-template-columns: 1fr 96px 1fr;
    padding: 0;
  }

  .page-about .tl-end svg {
    grid-column: 2;
    justify-self: center;
  }

  .page-about .crew-head {
    grid-template-columns: 6fr 6fr;
    gap: 48px;
  }

  .page-about .crew-grid {
    grid-template-columns: 4fr 3fr 5fr;
    gap: 20px;
    margin-top: 44px;
  }

  .page-about .local-grid {
    grid-template-columns: 6fr 6fr;
    gap: 44px;
    align-items: start;
  }

  .page-about .rhythm-grid {
    grid-template-columns: 5fr 7fr;
    gap: 52px;
    align-items: start;
  }

  .page-about .gather-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (hover: none) {
  .page-about .tl-more {
    max-height: none;
    margin-top: 10px;
    padding-left: 12px;
    opacity: 1;
    border-left-color: var(--gold-soft);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-more,
  .page-about .tl-dot,
  .page-about .about-jump,
  .page-about .about-btn,
  .page-about .crew-card,
  .page-about .gather-item {
    transition: none;
  }
}
<<<END>>>