.page-about {
  --ab-ink: #14201b;
  --ab-paper-line: rgba(20, 32, 27, 0.18);
  --ab-gutter: 20px;
  background: var(--ink-void);
  color: var(--bone);
  overflow-x: hidden;
}

.page-about a {
  color: var(--aqua);
  text-decoration: none;
  border-bottom: 1px solid rgba(67, 240, 208, 0.35);
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about a:hover {
  color: var(--signal);
  border-color: rgba(255, 106, 42, 0.5);
}

.page-about a:focus-visible,
.page-about summary:focus-visible {
  outline: 2px solid var(--aqua);
  outline-offset: 3px;
}

.page-about p {
  margin: 0 0 12px;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.68;
  color: rgba(247, 243, 232, 0.82);
}

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

.page-about .dx-h2 {
  font-size: clamp(26px, 5.6vw, 40px);
  line-height: 1.08;
}

.page-about .dx-h3 {
  font-size: clamp(19px, 3.6vw, 24px);
  line-height: 1.22;
  margin-bottom: 10px;
}

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

.page-about .dx-breadcrumb {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .dx-breadcrumb a {
  color: var(--mist);
  border-bottom-color: transparent;
}

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

.page-about .dx-breadcrumb__sep {
  color: var(--ink-field);
  margin: 0 6px;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding: 26px 0 0;
  background-image:
    linear-gradient(180deg, rgba(13, 33, 25, 0.78), transparent 62%),
    repeating-linear-gradient(90deg, rgba(158, 174, 165, 0.09) 0 1px, transparent 1px 72px);
}

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

.page-about .ab-hero .dx-h1 {
  font-size: clamp(32px, 8.4vw, 66px);
  line-height: 0.98;
  margin: 14px 0 18px;
  max-width: 18ch;
}

.page-about .ab-hero__lead {
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.62;
  color: rgba(247, 243, 232, 0.86);
}

.page-about .ab-hero__jump {
  margin: 18px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-about .ab-hero__side {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding-left: 16px;
  border-left: 1px solid var(--line-mid);
}

.page-about .ab-rail {
  display: none;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .ab-stat {
  display: grid;
  gap: 2px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line-soft);
}

.page-about .ab-stat:last-child {
  border-bottom: 0;
}

.page-about .ab-stat__k {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .ab-stat__v {
  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 1.1;
  color: var(--aqua);
}

.page-about .ab-stat__t {
  font-size: 12px;
  line-height: 1.5;
  color: rgba(247, 243, 232, 0.62);
}

.page-about .ab-hero__media {
  margin: 34px 0 0;
  position: relative;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), 0 100%);
}

.page-about .ab-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.82) contrast(1.08);
}

.page-about .ab-hero__media figcaption {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--bone);
  background: rgba(4, 16, 24, 0.72);
}

/* ---------- 通用章节头 ---------- */
.page-about .ab-section {
  padding: 56px 0;
}

.page-about .ab-head {
  display: grid;
  gap: 10px;
  max-width: 64ch;
  margin-bottom: 30px;
}

/* ---------- 编年史 ---------- */
.page-about .ab-chronicle {
  border-top: 1px solid var(--line-soft);
}

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

.page-about .ab-timeline__item {
  position: relative;
  display: grid;
  gap: 16px;
  padding: 26px 0 30px;
  border-top: 1px solid var(--line-soft);
}

.page-about .ab-timeline__mark {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--aqua);
}

.page-about .ab-timeline__mark em {
  font-style: normal;
  color: var(--signal);
  letter-spacing: 0.1em;
}

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

.page-about .ab-note {
  background: var(--paper);
  color: var(--ab-ink);
  padding: 16px 18px;
  border-radius: 2px 18px 4px 16px;
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.38);
  transform: rotate(-0.5deg);
}

.page-about .ab-note p {
  margin: 0;
  font-size: 13px;
  line-height: 1.62;
  color: var(--ab-ink);
}

/* ---------- 三条轴 ---------- */
.page-about .ab-axes {
  background: var(--paper);
  color: var(--ab-ink);
  padding: 54px 0 60px;
  border-top: 2px solid var(--ink-field);
  border-bottom: 2px solid var(--ink-field);
}

.page-about .ab-axes__inner {
  display: grid;
  gap: 32px;
  align-items: start;
}

.page-about .ab-axes .dx-h2 {
  color: var(--ab-ink);
  margin: 8px 0 16px;
}

.page-about .ab-axes p {
  color: #33443c;
}

.page-about .ab-axes .dx-eyebrow {
  color: #5d6f66;
}

.page-about .ab-axis-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .ab-axis-list li {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-top: 1px solid var(--ab-paper-line);
}

.page-about .ab-axis-list strong {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--stand);
}

.page-about .ab-axis-list span {
  font-size: 14px;
  line-height: 1.62;
  color: #33443c;
}

.page-about .ab-axes__fig {
  margin: 0;
  padding: 16px;
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid var(--ab-paper-line);
  border-radius: var(--radius-md);
}

.page-about .ab-axes__fig svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .ab-axes__fig figcaption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: #5d6f66;
}

/* ---------- 编辑部的一天 ---------- */
.page-about .ab-desk {
  display: grid;
  gap: 28px;
}

.page-about .ab-desk__media {
  margin: 0;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--night);
}

.page-about .ab-desk__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.05);
}

.page-about .ab-desk__media figcaption {
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--mist);
  border-top: 1px solid var(--line-soft);
}

.page-about .ab-flow {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
}

.page-about .ab-flow li {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--line-mid);
}

.page-about .ab-flow time {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--aqua);
  padding-top: 3px;
}

.page-about .ab-flow strong {
  display: block;
  font-size: 15px;
  font-weight: 700;
  color: var(--bone);
  margin-bottom: 4px;
}

.page-about .ab-flow p {
  margin: 0;
  font-size: 14px;
  color: rgba(247, 243, 232, 0.74);
}

.page-about .ab-crew {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 22px 0 0;
}

.page-about .ab-crew div {
  background: var(--ink-deep);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  padding: 14px 12px;
}

.page-about .ab-crew span {
  display: block;
  font-family: var(--font-mono);
  font-size: 26px;
  line-height: 1.1;
  color: var(--aqua);
}

.page-about .ab-crew small {
  display: block;
  margin-top: 4px;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .ab-desk__link {
  margin: 20px 0 0;
  font-size: 14px;
}

/* ---------- 换设备 ---------- */
.page-about .ab-switch {
  position: relative;
  background:
    radial-gradient(circle at 82% 8%, rgba(67, 240, 208, 0.14), transparent 46%),
    var(--ink-deep);
  border-top: 1px solid var(--line-mid);
  border-bottom: 1px solid var(--line-mid);
  padding: 54px 0 58px;
}

.page-about .ab-switch__lead {
  max-width: 60ch;
}

.page-about .ab-steps {
  display: grid;
  gap: 10px;
}

.page-about .ab-step {
  background: rgba(4, 16, 24, 0.55);
  border: 1px solid var(--line-mid);
  border-radius: var(--radius-md);
  transition: border-color 180ms var(--ease), transform 180ms var(--ease);
}

.page-about .ab-step:hover {
  border-color: var(--aqua-soft);
  transform: translateY(-2px);
}

.page-about .ab-step summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--bone);
}

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

.page-about .ab-step summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--signal);
}

.page-about .ab-step[open] summary::after {
  content: "–";
}

.page-about .ab-step__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--aqua);
  flex: none;
}

.page-about .ab-step__body {
  padding: 0 18px 18px 18px;
  border-top: 1px solid var(--line-soft);
  margin-top: 2px;
  padding-top: 14px;
}

.page-about .ab-step__body p {
  font-size: 14px;
  color: rgba(247, 243, 232, 0.78);
}

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

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

.page-about .ab-cta a {
  border-bottom: 0;
}

/* ---------- 服务范围 ---------- */
.page-about .ab-reach {
  display: grid;
  gap: 30px;
  align-items: start;
}

.page-about .ab-reach__copy p {
  max-width: 56ch;
}

.page-about .ab-facts {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .ab-facts li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .ab-facts__k {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .ab-facts__v {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--bone);
  text-align: right;
}

.page-about .ab-reach__link {
  margin-top: 20px;
  font-size: 14px;
}

.page-about .ab-reach__media {
  margin: 0;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--night);
}

.page-about .ab-reach__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.8) contrast(1.08);
}

.page-about .ab-reach__media figcaption {
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--mist);
  border-top: 1px solid var(--line-soft);
}

/* ---------- 中等屏 ---------- */
@media (min-width: 720px) {
  .page-about .ab-hero__side {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    padding-left: 0;
    border-left: 0;
    border-top: 1px solid var(--line-mid);
    padding-top: 18px;
  }

  .page-about .ab-stat {
    border-bottom: 0;
    padding-bottom: 0;
  }

  .page-about .ab-flow li {
    grid-template-columns: 110px minmax(0, 1fr);
    gap: 20px;
  }

  .page-about .ab-step__body {
    padding-left: 48px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 940px) {
  .page-about .ab-hero {
    padding-top: 34px;
  }

  .page-about .ab-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 48px;
    align-items: end;
  }

  .page-about .ab-hero__side {
    display: flex;
    flex-direction: column;
    gap: 14px;
    padding-top: 0;
    padding-left: 20px;
    border-top: 0;
    border-left: 1px solid var(--line-mid);
  }

  .page-about .ab-rail {
    display: block;
    writing-mode: vertical-rl;
    align-self: flex-start;
    margin-bottom: 8px;
  }

  .page-about .ab-stat {
    border-bottom: 1px dashed var(--line-soft);
    padding-bottom: 12px;
  }

  .page-about .ab-hero__media {
    margin-top: 44px;
  }

  .page-about .ab-section {
    padding: 76px 0;
  }

  .page-about .ab-timeline__item {
    grid-template-columns: 110px minmax(0, 1fr) minmax(0, 300px);
    gap: 32px;
    padding: 34px 0 38px;
    align-items: start;
  }

  .page-about .ab-timeline__mark {
    flex-direction: column;
    gap: 4px;
    padding-top: 6px;
  }

  .page-about .ab-note {
    transform: rotate(-1.2deg);
  }

  .page-about .ab-axes {
    padding: 72px 0 80px;
  }

  .page-about .ab-axes__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 420px);
    gap: 56px;
  }

  .page-about .ab-desk {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    gap: 44px;
  }

  .page-about .ab-switch {
    padding: 72px 0 80px;
  }

  .page-about .ab-step summary {
    font-size: 20px;
    padding: 18px 22px;
  }

  .page-about .ab-step__body {
    padding-left: 58px;
    padding-right: 22px;
  }

  .page-about .ab-reach {
    grid-template-columns: minmax(0, 1fr) minmax(0, 380px);
    gap: 52px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-step,
  .page-about .ab-note,
  .page-about a {
    transition: none;
    transform: none;
  }
}
<<<PAGE_CSS_END>>>
<<<END>>>