.page-about {
  --about-pad: clamp(44px, 7vw, 88px);
  background: var(--paper);
  color: var(--ink);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: calc(var(--header-h) + clamp(26px, 5vw, 54px)) 0 clamp(34px, 5vw, 60px);
  background:
    radial-gradient(120% 100% at 92% -20%, rgba(200, 255, 61, 0.62), rgba(230, 255, 168, 0) 62%),
    linear-gradient(180deg, var(--card), var(--paper) 74%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(90deg, rgba(27, 21, 18, 0.055) 0 1px, transparent 1px 72px);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--kiwi) 0 34%, var(--ember) 34% 46%, var(--ink) 46% 100%);
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(26px, 4vw, 54px);
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
}

.page-about .about-hero__title {
  font-family: var(--f-serif);
  font-size: clamp(30px, 5.4vw, 54px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  margin: 14px 0 0;
  max-width: 16em;
}

.page-about .about-hero__lead {
  margin: 18px 0 0;
  max-width: 34em;
  font-size: clamp(15.5px, 1.7vw, 17.5px);
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .about-hero__meta {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin: 24px 0 0;
  padding: 14px 0 0;
  border-top: 1px solid var(--line-strong);
  font-family: var(--f-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--ink-soft);
}

.page-about .about-hero__meta-item::before {
  content: "◆";
  color: var(--ember);
  font-size: 9px;
  margin-right: 8px;
  vertical-align: 1px;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__media {
  position: relative;
  margin: 0;
}

.page-about .about-hero__media .media {
  border: 2px solid var(--ink);
  box-shadow: var(--shadow-print);
  background: var(--card);
}

.page-about .about-hero__media .media__caption {
  margin-top: 12px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-about .about-chip {
  position: absolute;
  left: -4px;
  bottom: 62px;
  background: var(--kiwi);
  color: var(--ink);
  border: 2px solid var(--ink);
  padding: 6px 12px;
  font-family: var(--f-narrow);
  font-weight: 800;
  font-size: 13px;
  letter-spacing: 0.06em;
  box-shadow: 3px 3px 0 rgba(27, 21, 18, 0.9);
}

/* ---------- 正文骨架 ---------- */
.page-about .about-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 44px);
  padding: clamp(28px, 5vw, 56px) 0 var(--about-pad);
}

.page-about .about-toc {
  align-self: start;
}

.page-about .about-toc__label {
  display: block;
  font-family: var(--f-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--ink-soft);
  padding-bottom: 10px;
  border-bottom: 2px solid var(--ink);
}

.page-about .about-toc__list {
  list-style: none;
  margin: 0;
  padding: 12px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 8px;
}

.page-about .about-toc__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 6px 10px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--card);
  color: var(--ink);
  text-decoration: none;
  font-size: 13.5px;
  transition: background 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  background: var(--kiwi);
  border-color: var(--ink);
  transform: translate(-1px, -1px);
}

.page-about .about-toc__num {
  font-family: var(--f-mono);
  font-size: 11px;
  color: var(--ink-soft);
}

.page-about .about-sec {
  border-top: 1px solid var(--line-strong);
  padding-top: clamp(26px, 4vw, 42px);
  margin-top: clamp(26px, 4vw, 42px);
}

.page-about .about-sec:first-child {
  border-top: 0;
  margin-top: 0;
  padding-top: 0;
}

.page-about .about-sec__head {
  display: grid;
  gap: 10px;
  margin-bottom: 18px;
}

.page-about .about-sec__num {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--ember);
}

.page-about .about-sec__title {
  font-family: var(--f-serif);
  font-size: clamp(24px, 3.6vw, 36px);
  line-height: 1.22;
  margin: 0;
  max-width: 20em;
}

.page-about .about-sec__lead {
  margin: 0;
  max-width: 40em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-sec p {
  max-width: 60ch;
  margin: 0 0 1em;
  font-size: clamp(15px, 1.5vw, 16.5px);
  line-height: 1.9;
  color: var(--ink-soft);
}

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

/* ---------- 引语 ---------- */
.page-about .about-quote {
  position: relative;
  margin: 26px 0 0;
  padding: 22px 22px 20px 26px;
  background: var(--card);
  border: 2px solid var(--ink);
  border-left: 8px solid var(--kiwi);
  box-shadow: var(--shadow-print);
}

.page-about .about-sec .about-quote__text {
  font-family: var(--f-serif);
  font-size: clamp(17px, 2.1vw, 21px);
  line-height: 1.65;
  color: var(--ink);
  margin: 0;
  max-width: 26em;
}

.page-about .about-quote__by {
  margin: 12px 0 0;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}

/* ---------- 团队面板 ---------- */
.page-about .about-team {
  margin-top: 22px;
  padding: clamp(18px, 3vw, 30px);
  background: var(--moss);
  color: var(--card);
  border: 2px solid var(--ink);
  box-shadow: var(--shadow-print);
}

.page-about .about-roles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .about-role {
  background: rgba(252, 249, 242, 0.06);
  border: 1px solid var(--line-light);
  border-left: 3px solid var(--kiwi);
  padding: 13px 15px;
}

.page-about .about-role__name {
  display: block;
  margin-bottom: 6px;
  font-family: var(--f-narrow);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 0.04em;
  color: var(--card);
}

.page-about .about-role__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(252, 249, 242, 0.78);
}

.page-about .about-rail-hint {
  display: block;
  margin: 22px 0 8px;
  font-family: var(--f-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--kiwi);
}

.page-about .about-rail {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding: 4px 2px 14px;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-step {
  flex: 0 0 min(238px, 76vw);
  scroll-snap-align: start;
  background: var(--card);
  color: var(--ink);
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  padding: 14px 16px 16px;
  box-shadow: 4px 4px 0 rgba(200, 255, 61, 0.6);
}

.page-about .about-step__num {
  display: inline-block;
  font-family: var(--f-mono);
  font-size: 12px;
  background: var(--kiwi);
  border: 1px solid var(--ink);
  padding: 1px 6px;
}

.page-about .about-step__title {
  display: block;
  margin: 10px 0 6px;
  font-family: var(--f-narrow);
  font-weight: 800;
  font-size: 16px;
}

.page-about .about-step__desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 22px 0 0;
}

.page-about .about-figure .media {
  border: 1px solid var(--line-light);
  background: rgba(252, 249, 242, 0.08);
}

.page-about .about-figure__cap {
  margin-top: 8px;
  font-family: var(--f-mono);
  font-size: 11.5px;
  line-height: 1.7;
  color: rgba(252, 249, 242, 0.62);
}

.page-about .about-figure--timeline {
  max-width: 560px;
}

.page-about .about-figure--timeline .media {
  border: 2px solid var(--ink);
  box-shadow: var(--shadow-print);
  background: var(--card);
}

.page-about .about-figure--timeline .about-figure__cap {
  color: var(--ink-soft);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 24px 0 0;
  padding: 0 0 0 20px;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: repeating-linear-gradient(180deg, var(--gold) 0 8px, transparent 8px 15px);
}

.page-about .about-node {
  position: relative;
  background: var(--card);
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  box-shadow: 4px 4px 0 rgba(27, 21, 18, 0.14);
}

.page-about .about-timeline li + li {
  margin-top: 14px;
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: -21px;
  top: 17px;
  width: 10px;
  height: 10px;
  background: var(--kiwi);
  border: 2px solid var(--ink);
  border-radius: 50%;
}

.page-about .about-node__summary {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  cursor: pointer;
  list-style: none;
}

.page-about .about-node__summary::-webkit-details-marker {
  display: none;
}

.page-about .about-node__summary::after {
  content: "+";
  flex: 0 0 auto;
  width: 22px;
  text-align: center;
  font-family: var(--f-mono);
  font-size: 16px;
  line-height: 20px;
  border: 1px solid var(--line-strong);
  color: var(--ink);
}

.page-about .about-node[open] .about-node__summary::after {
  content: "−";
  background: var(--kiwi);
  border-color: var(--ink);
}

.page-about .about-node__year {
  font-family: var(--f-mono);
  font-weight: 700;
  font-size: 13px;
  background: var(--kiwi);
  border: 1px solid var(--ink);
  padding: 2px 7px;
}

.page-about .about-node__title {
  flex: 1 1 auto;
  font-family: var(--f-narrow);
  font-weight: 800;
  font-size: 15.5px;
  line-height: 1.4;
}

.page-about .about-node__body {
  padding: 0 16px 16px;
}

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

/* ---------- 正式 / 测试版对照 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin: 22px 0;
}

.page-about .about-panel {
  background: var(--card);
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  padding: 16px 18px;
  box-shadow: 4px 4px 0 rgba(27, 21, 18, 0.14);
}

.page-about .about-panel--beta {
  background: linear-gradient(170deg, var(--kiwi-soft), var(--card) 78%);
}

.page-about .about-panel__title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 12px;
  font-family: var(--f-narrow);
  font-weight: 800;
  font-size: 15px;
  max-width: none;
  color: var(--ink);
}

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

.page-about .about-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-about .about-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 7px;
  background: var(--teal);
}

.page-about .about-panel--beta .about-list li::before {
  background: var(--ember);
}

/* ---------- 数据带 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px 14px;
  margin: 22px 0;
  padding: clamp(18px, 3vw, 28px);
  background: var(--ink);
  color: var(--card);
  border: 2px solid var(--ink);
  box-shadow: var(--shadow-print);
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--f-mono);
  font-weight: 700;
  font-size: clamp(23px, 3.6vw, 34px);
  line-height: 1;
  color: var(--kiwi);
}

.page-about .about-stat__unit {
  font-size: 0.46em;
  letter-spacing: 0.02em;
}

.page-about .about-stat__label {
  display: block;
  margin-top: 9px;
  font-size: 12.5px;
  line-height: 1.65;
  color: rgba(252, 249, 242, 0.72);
}

/* ---------- 下一步 ---------- */
.page-about .about-next__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}

.page-about .about-next__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 15px;
  background: var(--card);
  color: var(--ink);
  text-decoration: none;
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  font-family: var(--f-narrow);
  font-weight: 800;
  font-size: 15px;
  box-shadow: 4px 4px 0 rgba(27, 21, 18, 0.14);
  transition: background 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
}

.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  background: var(--kiwi);
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 rgba(27, 21, 18, 0.9);
}

.page-about .about-next__arrow {
  font-family: var(--f-mono);
  color: var(--ember);
}

.page-about .about-contact {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 2px solid var(--ink);
  display: grid;
  gap: 8px;
  font-family: var(--f-mono);
  font-size: 13px;
  color: var(--ink-soft);
}

.page-about .about-contact__row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 10px;
}

.page-about .about-contact__label {
  min-width: 4.5em;
  color: var(--ink);
  font-weight: 700;
}

.page-about .about-sec .about-contact__note {
  margin: 6px 0 0;
  font-family: var(--f-sans);
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 46em;
}

/* ---------- 自适应 ---------- */
@media (min-width: 640px) {
  .page-about .about-roles {
    grid-template-columns: 1fr 1fr;
  }

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

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

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
  }

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

@media (min-width: 960px) {
  .page-about .about-shell {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
  }

  .page-about .about-toc {
    position: sticky;
    top: calc(var(--header-h) + 22px);
  }

  .page-about .about-toc__list {
    display: grid;
    gap: 8px;
  }

  .page-about .about-toc__link {
    justify-content: flex-start;
    width: 100%;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-toc__link,
  .page-about .about-next__link {
    transition: none;
  }

  .page-about .about-toc__link:hover,
  .page-about .about-next__link:hover {
    transform: none;
  }
}
<<<END>>>