.page-about {
  --about-space: clamp(46px, 6.4vw, 92px);
  --about-node: 35px;
  display: block;
  padding-bottom: clamp(36px, 5vw, 72px);
}

.page-about .about-slash {
  color: var(--gold);
  padding: 0 4px;
}

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  margin-top: clamp(16px, 2.6vw, 30px);
}

.page-about .about-hero__frame {
  position: relative;
  border: 1px solid var(--line);
  padding: clamp(24px, 4.8vw, 62px) clamp(20px, 4vw, 56px);
  background:
    radial-gradient(120% 90% at 10% 0%, rgba(78, 168, 199, 0.16), transparent 62%),
    linear-gradient(158deg, var(--surface-strong), rgba(6, 43, 51, 0.35));
  box-shadow: var(--shadow);
}

.page-about .about-hero__frame::before,
.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 6px;
  background: repeating-linear-gradient(90deg, rgba(201, 162, 39, 0.75) 0 1px, transparent 1px 16px);
  opacity: 0.55;
  pointer-events: none;
}

.page-about .about-hero__frame::before { top: -1px; }
.page-about .about-hero__frame::after { bottom: -1px; }

.page-about .about-hero__title {
  font-size: clamp(32px, 6vw, 76px);
  line-height: 1.14;
  margin: 0.32em 0 0.34em;
  max-width: 15em;
}

.page-about .about-hero__accent {
  color: var(--gold-bright);
  text-shadow: 0 0 26px rgba(232, 200, 106, 0.28);
}

.page-about .about-hero__lede {
  max-width: 34em;
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(20px, 3vw, 32px);
}

.page-about .about-banner {
  margin-top: clamp(16px, 2.4vw, 26px);
}

.page-about .about-banner img {
  display: block;
  width: 100%;
  height: clamp(170px, 26vw, 340px);
  object-fit: cover;
}

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  padding-block: var(--about-space);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-section .section-title {
  margin: 0.2em 0 0.7em;
  max-width: 20em;
}

.page-about .about-section .prose p {
  margin: 0 0 1em;
}

.page-about .about-section .prose p:last-child {
  margin-bottom: 0;
}

.page-about .about-note {
  border-left: 1px solid var(--line);
  padding-left: 14px;
  margin-bottom: 18px;
}

.page-about .about-note__k {
  margin: 0 0 4px;
  font-family: var(--font-index);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .about-note__v {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--porcelain);
  opacity: 0.86;
}

/* ---------- 索引组织 ---------- */
.page-about .about-counts {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .about-count {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-count__n {
  font-family: var(--font-index);
  font-size: 22px;
  line-height: 1;
  color: var(--gold-bright);
  letter-spacing: -0.02em;
  min-width: 2.6em;
}

.page-about .about-count__t {
  font-size: 13px;
  color: var(--mist);
  line-height: 1.5;
}

.page-about .about-tree-wrap {
  margin-top: clamp(22px, 3vw, 32px);
  padding: clamp(16px, 2.6vw, 26px);
  border: 1px solid var(--line-soft);
}

.page-about .about-tree {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .tree-spine,
.page-about .tree-arm,
.page-about .tree-branch {
  stroke: var(--gold);
  stroke-width: 1;
  fill: none;
  opacity: 0.5;
}

.page-about .tree-dot {
  fill: var(--gold-bright);
  transition: fill 0.3s var(--ease);
}

.page-about .tree-leaf line {
  stroke: var(--coral);
  stroke-width: 2;
  stroke-linecap: round;
  opacity: 0.72;
  transition: opacity 0.3s var(--ease), stroke-width 0.3s var(--ease);
}

.page-about .tree-labels text {
  fill: var(--mist);
  font-family: var(--font-index);
  font-size: 11px;
  letter-spacing: 0.06em;
}

.page-about .tree-group:hover .tree-leaf line {
  opacity: 1;
  stroke-width: 3;
}

.page-about .tree-group:hover .tree-dot {
  fill: var(--porcelain);
}

.page-about .about-tree__cap {
  margin: 14px 0 0;
  font-size: 12.5px;
  color: var(--mist);
  line-height: 1.6;
}

/* ---------- 版本历程 ---------- */
.page-about .about-era-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 clamp(24px, 3.6vw, 38px);
}

.page-about .about-era-jump a {
  font-family: var(--font-index);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  padding: 7px 11px;
  border: 1px solid var(--line-soft);
  color: var(--mist);
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .about-era-jump a:hover,
.page-about .about-era-jump a:focus-visible {
  color: var(--gold-bright);
  border-color: var(--gold);
  background: rgba(201, 162, 39, 0.08);
}

.page-about .about-eras__grid {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

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

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 17px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, transparent, rgba(201, 162, 39, 0.55) 8%, rgba(201, 162, 39, 0.55) 92%, transparent);
}

.page-about .tl-item {
  position: relative;
  padding: 0 0 clamp(28px, 4vw, 44px) 54px;
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-about .tl-item:last-child {
  padding-bottom: 0;
}

.page-about .tl-node {
  position: absolute;
  left: 0;
  top: 0;
  width: var(--about-node);
  height: var(--about-node);
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-family: var(--font-index);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--gold-bright);
  background: var(--ink-900);
  border: 1px solid var(--line);
  box-shadow: 0 0 0 4px rgba(6, 43, 51, 0.92);
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about .tl-item:target .tl-node {
  border-color: var(--gold-bright);
  box-shadow: 0 0 0 4px rgba(6, 43, 51, 0.92), 0 0 20px rgba(232, 200, 106, 0.55);
}

.page-about .tl-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 600;
  color: var(--porcelain);
  line-height: 1.35;
}

.page-about .tl-text {
  margin: 0 0 8px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--porcelain);
  opacity: 0.88;
  max-width: 34em;
}

.page-about .tl-note {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--glass-blue);
  max-width: 34em;
}

.page-about .about-craft {
  margin: 0;
  align-self: start;
}

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

/* ---------- 批次校验 ---------- */
.page-about .about-steps {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-step {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "no title"
    "no text";
  column-gap: 16px;
  padding: 16px 18px;
  border: 1px solid var(--line-soft);
  background: linear-gradient(140deg, var(--surface-strong), rgba(6, 43, 51, 0.18));
  transition: border-color 0.25s var(--ease);
}

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

.page-about .about-step__no {
  grid-area: no;
  font-family: var(--font-index);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--coral);
  padding-top: 4px;
}

.page-about .about-step__title {
  grid-area: title;
  margin: 0 0 6px;
  font-size: 16.5px;
  font-weight: 600;
  color: var(--porcelain);
  line-height: 1.4;
}

.page-about .about-step__text {
  grid-area: text;
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

.page-about .about-batch {
  margin-bottom: 18px;
}

.page-about .about-batch__list {
  list-style: none;
  margin: 14px 0 12px;
  padding: 0;
}

.page-about .about-batch__list li {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 13px;
}

.page-about .about-batch__list span {
  color: var(--mist);
}

.page-about .about-batch__list strong {
  color: var(--porcelain);
  font-weight: 500;
  font-family: var(--font-index);
  font-size: 12.5px;
}

.page-about .about-batch__link {
  margin-top: 14px;
}

/* ---------- 维护分工 ---------- */
.page-about .about-team {
  display: grid;
  gap: 14px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .team-card {
  border: 1px solid var(--line);
  padding: clamp(18px, 2.6vw, 26px);
  background: linear-gradient(160deg, var(--surface-strong), rgba(6, 43, 51, 0.24));
}

.page-about .team-card--wine {
  background: linear-gradient(155deg, rgba(110, 42, 60, 0.52), rgba(6, 43, 51, 0.4));
  border-color: rgba(110, 42, 60, 0.55);
}

.page-about .team-card__n {
  margin: 0;
  font-family: var(--font-index);
  font-size: clamp(40px, 6vw, 58px);
  font-weight: 300;
  line-height: 1;
  color: var(--gold-bright);
  letter-spacing: -0.03em;
}

.page-about .team-card__title {
  margin: 12px 0 8px;
  font-size: 17px;
  font-weight: 600;
  color: var(--porcelain);
}

.page-about .team-card__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

.page-about .about-team__link {
  margin-top: 4px;
}

/* ---------- 数据概览 ---------- */
.page-about .about-stats__banner {
  margin: clamp(18px, 3vw, 28px) 0 clamp(18px, 3vw, 26px);
}

.page-about .about-stats__banner img {
  display: block;
  width: 100%;
  height: clamp(150px, 24vw, 300px);
  object-fit: cover;
}

.page-about .stat-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .stat-card {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 128px;
  padding: 18px 16px 16px;
  border: 1px solid var(--line-soft);
  border-top: 1px solid var(--gold);
  background: linear-gradient(172deg, var(--surface-strong), rgba(6, 43, 51, 0.22));
}

.page-about .stat-line {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.page-about .stat-num {
  font-family: var(--font-index);
  font-size: clamp(28px, 4.4vw, 44px);
  font-weight: 300;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--gold-bright);
}

.page-about .stat-unit {
  font-family: var(--font-index);
  font-size: 12px;
  color: var(--mist);
}

.page-about .stat-label {
  margin: 12px 0 0;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--porcelain);
  opacity: 0.82;
}

/* ---------- 下一页入口 ---------- */
.page-about .about-next {
  display: grid;
  gap: 12px;
  margin-top: clamp(18px, 3vw, 26px);
}

.page-about .next-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 20px;
  border: 1px solid var(--line-soft);
  background: var(--surface);
  text-decoration: none;
  transition: transform 0.24s var(--ease), border-color 0.24s var(--ease), background 0.24s var(--ease);
}

.page-about .next-card:hover,
.page-about .next-card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--gold);
  background: var(--surface-strong);
}

.page-about .next-card__k {
  font-family: var(--font-index);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .next-card__t {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  color: var(--gold-bright);
}

.page-about .next-card__d {
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--porcelain);
  opacity: 0.8;
}

/* ---------- 中等宽度 ---------- */
@media (min-width: 720px) {
  .page-about .about-next {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

/* ---------- 桌面大屏 ---------- */
@media (min-width: 980px) {
  .page-about .about-eras__grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.62fr);
    align-items: start;
  }

  .page-about .about-craft {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

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

  .page-about .stat-card {
    min-height: 156px;
    padding: 22px 20px 20px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero__lede {
    font-size: 17.5px;
  }

  .page-about .tl-item {
    padding-left: 62px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .next-card,
  .page-about .tl-node,
  .page-about .tree-leaf line,
  .page-about .tree-dot {
    transition: none;
  }

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