.page-about {
  --ab-gutter: 20px;
  --ab-radius: 2px;
  background: var(--paper);
  color: var(--ink-800);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
}

.page-about .shell {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--ab-gutter);
}

.page-about h1,
.page-about h2,
.page-about h3 {
  color: var(--ink-900);
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 0;
}

.page-about h1 {
  font-size: clamp(30px, 6.4vw, 50px);
  line-height: 1.14;
  margin-block: 14px 18px;
}

.page-about h2 {
  font-size: clamp(24px, 4.4vw, 34px);
  line-height: 1.26;
  margin-block: 10px 16px;
}

.page-about h3 {
  font-size: 18px;
  line-height: 1.4;
  margin-block: 6px 8px;
}

.page-about p {
  margin: 0 0 14px;
  color: var(--stone-600);
}

.page-about .lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-800);
}

.page-about .eyebrow {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--orange);
  margin: 0;
}

.page-about .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

.page-about .crumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--stone-400);
  padding-top: 18px;
}

.page-about .crumbs a {
  color: var(--ink-700);
  text-decoration: none;
}

.page-about .crumbs a:hover {
  color: var(--orange);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding-block: 8px 52px;
  background:
    linear-gradient(180deg, var(--paper) 0%, var(--paper) 70%, rgba(217, 209, 194, 0.35) 100%);
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  top: -70px;
  right: -110px;
  width: 300px;
  height: 300px;
  background: linear-gradient(150deg, var(--orange) 0%, var(--orange-deep) 100%);
  clip-path: polygon(30% 0, 100% 0, 100% 78%, 0 100%);
  opacity: 0.16;
  pointer-events: none;
}

.page-about .ab-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 32px;
  margin-top: 20px;
}

.page-about .ab-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 18px;
  margin: 22px 0 26px;
  padding: 0;
  list-style: none;
}

.page-about .ab-facts li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-left: 12px;
  border-left: 2px solid var(--orange-soft);
}

.page-about .ab-facts__num {
  font-size: 20px;
  font-weight: 700;
  color: var(--ink-900);
  line-height: 1.2;
}

.page-about .ab-facts__txt {
  font-size: 13px;
  color: var(--stone-600);
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .ab-hero__figure {
  margin: 0;
}

.page-about .ab-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border: 1px solid var(--rule);
  background: var(--paper-white);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), 0 100%);
}

.page-about .ab-hero__figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  color: var(--stone-400);
  letter-spacing: 0.04em;
}

/* ---------- 起点 ---------- */
.page-about .ab-origin {
  padding-block: 52px;
  background: var(--paper-white);
  border-block: 1px solid var(--rule);
}

.page-about .ab-origin__grid {
  display: grid;
  gap: 28px;
}

.page-about .ab-origin__panel {
  background: var(--ink-900);
  color: var(--paper);
  padding: 26px 22px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%);
}

.page-about .ab-origin__ver {
  font-size: 52px;
  font-weight: 700;
  line-height: 1;
  margin: 0;
  color: var(--paper);
}

.page-about .ab-origin__ver-label {
  margin: 8px 0 16px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--orange-soft);
}

.page-about .ab-origin__panel .ab-origin__ver-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(246, 241, 231, 0.78);
}

/* ---------- 时间轴 ---------- */
.page-about .ab-timeline {
  padding-block: 56px;
}

.page-about .ab-sec-head {
  max-width: 720px;
  margin-bottom: 32px;
}

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

.page-about .tl {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 16px;
  bottom: 16px;
  width: 2px;
  background: linear-gradient(180deg, var(--orange) 0%, var(--orange-soft) 55%, var(--rule) 100%);
}

.page-about .tl__item {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.page-about .tl__item::before {
  content: "";
  width: 12px;
  height: 12px;
  margin: 22px 0 0 6px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--orange);
  box-sizing: content-box;
}

.page-about .tl__item--media::before,
.page-about .tl__item--quote::before {
  border-radius: 1px;
  border-color: var(--ink-700);
}

.page-about .tl__card {
  background: var(--paper-white);
  border: 1px solid var(--rule);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-about .tl__card summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  transition: background 180ms var(--ease);
}

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

.page-about .tl__card summary:hover {
  background: rgba(246, 201, 184, 0.3);
}

.page-about .tl__card summary:focus-visible {
  outline: 2px solid var(--ink-700);
  outline-offset: -3px;
}

.page-about .tl__ver {
  font-size: 18px;
  font-weight: 700;
  color: var(--orange);
  background: var(--orange-soft);
  padding: 2px 9px;
  line-height: 1.5;
}

.page-about .tl__name {
  font-size: 17px;
  font-weight: 700;
  color: var(--ink-900);
  line-height: 1.4;
}

.page-about .tl__hint {
  font-size: 12px;
  color: var(--stone-400);
  white-space: nowrap;
}

.page-about .tl__card[open] .tl__hint {
  color: var(--stone-600);
}

.page-about .tl__body {
  padding: 0 18px 18px;
  border-top: 1px solid var(--rule);
  margin-top: 2px;
  padding-top: 14px;
}

.page-about .tl__body p {
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 10px;
}

.page-about .tl__meta {
  font-size: 12px;
  color: var(--stone-400);
  letter-spacing: 0.02em;
  margin: 0;
}

.page-about .tl__figure {
  margin: 0;
  background: var(--paper-white);
  border: 1px solid var(--rule);
  padding: 10px;
}

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

.page-about .tl__figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--stone-600);
}

.page-about .ab-quote {
  margin: 0;
  padding: 26px 22px;
  background: var(--orange-soft);
  border-left: 4px solid var(--orange);
}

.page-about .ab-quote p {
  font-family: var(--font-serif);
  font-size: 19px;
  line-height: 1.7;
  color: var(--ink-900);
  margin: 0 0 12px;
}

.page-about .ab-quote cite {
  font-style: normal;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--orange-deep);
}

/* ---------- 团队 ---------- */
.page-about .ab-team {
  padding-block: 56px;
  background: var(--paper-white);
  border-block: 1px solid var(--rule);
}

.page-about .ab-team__head {
  max-width: 760px;
  margin-bottom: 26px;
}

.page-about .ab-team__figure {
  margin: 0 0 28px;
}

.page-about .ab-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border: 1px solid var(--rule);
  background: var(--paper);
}

.page-about .team-band {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--ink-900);
}

.page-about .team-band li {
  padding: 18px 10px 20px;
  border-bottom: 1px solid var(--rule);
  transition: background 180ms var(--ease), padding-left 180ms var(--ease);
}

.page-about .team-band li:hover,
.page-about .team-band li:focus-within {
  background: rgba(246, 201, 184, 0.45);
  padding-left: 16px;
}

.page-about .team-band__no {
  font-size: 12px;
  font-weight: 600;
  color: var(--orange);
  letter-spacing: 0.1em;
}

.page-about .team-band p {
  font-size: 14px;
  line-height: 1.75;
  margin: 0;
}

/* ---------- 维护节奏 ---------- */
.page-about .ab-pledge {
  padding-block: 56px;
}

.page-about .ab-sec-head--tight {
  margin-bottom: 26px;
}

.page-about .pledge {
  margin: 0;
  border-top: 1px solid var(--ink-900);
}

.page-about .pledge__row {
  display: grid;
  gap: 4px;
  padding: 18px 0;
  border-bottom: 1px solid var(--rule);
}

.page-about .pledge dt {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink-900);
  position: relative;
  padding-left: 16px;
}

.page-about .pledge dt::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 7px;
  background: var(--orange);
  transform: rotate(45deg);
}

.page-about .pledge dd {
  margin: 0;
  padding-left: 16px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--stone-600);
}

/* ---------- 认证通道 ---------- */
.page-about .ab-auth {
  padding-block: 8px 60px;
}

.page-about .ab-auth__panel {
  position: relative;
  background: var(--ink-900);
  color: var(--paper);
  padding: 32px 22px 30px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 34px), calc(100% - 34px) 100%, 0 100%);
  overflow: hidden;
}

.page-about .ab-auth__panel::after {
  content: "";
  position: absolute;
  right: -40px;
  bottom: -60px;
  width: 220px;
  height: 220px;
  background: var(--orange);
  opacity: 0.16;
  clip-path: polygon(50% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about .ab-auth__panel .eyebrow {
  color: var(--orange-soft);
}

.page-about .ab-auth__panel h2 {
  color: var(--paper);
  max-width: 640px;
}

.page-about .ab-auth__panel p {
  color: rgba(246, 241, 231, 0.82);
  max-width: 720px;
  font-size: 15px;
  line-height: 1.8;
}

.page-about .ab-auth__list {
  list-style: none;
  margin: 22px 0 26px;
  padding: 0;
  display: grid;
  gap: 12px;
  position: relative;
  z-index: 1;
}

.page-about .ab-auth__list li {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(246, 241, 231, 0.86);
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(217, 209, 194, 0.22);
}

.page-about .ab-auth__list .mono {
  font-size: 16px;
  font-weight: 700;
  color: var(--orange-soft);
}

.page-about .ab-auth__links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  position: relative;
  z-index: 1;
}

.page-about .ab-auth__link {
  font-size: 14px;
  color: var(--orange-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(246, 201, 184, 0.5);
  padding-bottom: 2px;
}

.page-about .ab-auth__link:hover {
  color: var(--paper);
  border-bottom-color: var(--paper);
}

.page-about [data-reveal] {
  opacity: 1;
}

@media (min-width: 720px) {
  .page-about {
    --ab-gutter: 32px;
  }

  .page-about .ab-hero {
    padding-block: 12px 72px;
  }

  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 40px;
    align-items: start;
    margin-top: 28px;
  }

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

  .page-about .ab-origin {
    padding-block: 72px;
  }

  .page-about .ab-origin__grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .ab-origin__panel {
    padding: 30px 26px;
  }

  .page-about .ab-timeline,
  .page-about .ab-team,
  .page-about .ab-pledge {
    padding-block: 84px;
  }

  .page-about .tl {
    gap: 22px;
    padding-left: 8px;
  }

  .page-about .tl::before {
    left: 19px;
  }

  .page-about .tl__item {
    grid-template-columns: 32px minmax(0, 1fr);
    gap: 22px;
  }

  .page-about .tl__item::before {
    margin-left: 10px;
    margin-top: 24px;
  }

  .page-about .tl__card {
    max-width: 860px;
  }

  .page-about .tl__card summary {
    padding: 20px 26px;
    gap: 18px;
  }

  .page-about .tl__name {
    font-size: 19px;
  }

  .page-about .tl__body {
    padding: 16px 26px 22px;
  }

  .page-about .tl__figure {
    max-width: 860px;
    padding: 14px;
  }

  .page-about .ab-quote {
    max-width: 760px;
    padding: 32px 36px;
  }

  .page-about .ab-quote p {
    font-size: 22px;
  }

  .page-about .team-band {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0 24px;
    border-bottom: 1px solid var(--rule);
  }

  .page-about .team-band li {
    border-bottom: 0;
    border-top: 3px solid var(--rule);
    padding: 18px 12px 22px 12px;
    margin-top: -2px;
  }

  .page-about .team-band li:hover,
  .page-about .team-band li:focus-within {
    border-top-color: var(--orange);
    padding-left: 12px;
  }

  .page-about .pledge__row {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
    padding: 20px 0;
  }

  .page-about .ab-auth {
    padding-block: 12px 88px;
  }

  .page-about .ab-auth__panel {
    padding: 46px 48px 42px;
  }

  .page-about .ab-auth__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .ab-auth__list li {
    grid-template-columns: 1fr;
    gap: 4px;
    border-bottom: 0;
    border-left: 2px solid rgba(246, 201, 184, 0.45);
    padding: 0 0 0 14px;
  }
}

@media (min-width: 1040px) {
  .page-about .ab-hero__figure {
    margin-top: 34px;
  }

  .page-about .ab-team__head {
    display: grid;
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    gap: 40px;
    max-width: none;
    align-items: end;
  }

  .page-about .ab-team__head h2 {
    margin-bottom: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl__card summary,
  .page-about .team-band li {
    transition: none;
  }
}
<<<END>>>