.page-about {
  --about-gap: clamp(20px, 3vw, 48px);
  --about-ink-soft: rgba(244, 241, 232, 0.78);
  --about-ink-dim: rgba(244, 241, 232, 0.58);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(18px, 2.6vw, 30px) 0 clamp(36px, 5vw, 68px);
  background:
    radial-gradient(120% 90% at 88% -12%, rgba(255, 106, 43, 0.12), transparent 62%),
    linear-gradient(180deg, var(--ink-2) 0%, var(--ink) 78%);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.55;
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.85), transparent 84%);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.85), transparent 84%);
}

.page-about .about-hero > .wrap {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  margin-top: clamp(16px, 2.4vw, 28px);
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: end;
  }
}

.page-about .about-hero__kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--signal-soft);
}

.page-about h1 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(30px, 5.4vw, 52px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--paper);
  max-width: 15em;
}

.page-about .about-hero__mark {
  box-shadow: inset 0 -0.2em 0 rgba(255, 106, 43, 0.42);
  padding-bottom: 0.02em;
}

.page-about .about-hero__text {
  margin: clamp(14px, 2vw, 20px) 0 0;
  max-width: 34em;
  font-family: var(--font-body);
  font-size: clamp(15.5px, 1.2vw, 17px);
  line-height: 1.9;
  color: var(--about-ink-soft);
}

.page-about .about-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(18px, 2.4vw, 26px);
}

.page-about .about-hero__panel {
  position: relative;
  padding: clamp(16px, 2.2vw, 26px);
  border: 1px solid var(--line-strong);
  background: rgba(232, 228, 216, 0.045);
  box-shadow: var(--paper-shadow);
}

.page-about .about-hero__panel::after {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  width: 46px;
  height: 6px;
  background: var(--signal);
}

.page-about .about-hero__panel-title {
  margin: 0 0 clamp(12px, 1.8vw, 18px);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--rock);
}

.page-about .about-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

@media (min-width: 520px) {
  .page-about .about-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .about-facts__item {
  background: var(--ink-2);
  padding: clamp(12px, 1.6vw, 16px);
  display: grid;
  gap: 6px;
  align-content: start;
}

.page-about .about-facts__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.8vw, 30px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--signal);
}

.page-about .about-facts__vs {
  font-size: 0.62em;
  color: var(--rock);
  letter-spacing: 0.04em;
}

.page-about .about-facts__label {
  font-family: var(--font-ui);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--about-ink-dim);
}

/* ---------- 手册主体：侧栏 + 正文 ---------- */
.page-about .manual {
  display: block;
  padding: clamp(28px, 4vw, 56px) 0 0;
}

@media (min-width: 860px) {
  .page-about .manual {
    display: grid;
    grid-template-columns: minmax(0, 3.4fr) minmax(0, 8.6fr);
    column-gap: clamp(24px, 4vw, 64px);
    align-items: start;
  }
}

.page-about .manual__rail {
  position: sticky;
  top: calc(var(--head-h) + var(--rail-h));
  z-index: 3;
  margin: 0 0 10px;
  padding: 10px 0;
  background: var(--ink);
  border-bottom: 1px solid var(--line);
}

@media (min-width: 860px) {
  .page-about .manual__rail {
    top: calc(var(--head-h) + var(--rail-h) + 18px);
    padding: 0;
    margin: 0;
    border-bottom: 0;
    max-height: calc(100vh - 140px);
    overflow: auto;
  }
}

.page-about .manual__rail-kicker {
  display: none;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--rock);
}

.page-about .manual__list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .manual__item {
  flex: 0 0 auto;
}

.page-about .manual__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 10px;
  border-left: 2px solid transparent;
  white-space: nowrap;
  text-decoration: none;
  color: var(--about-ink-soft);
  font-family: var(--font-ui);
  font-size: 13.5px;
  transition: color var(--step), border-color var(--step), background-color var(--step);
}

.page-about .manual__no {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--rock);
  transition: color var(--step);
}

.page-about .manual__link:hover,
.page-about .manual__link:focus-visible {
  border-left-color: var(--signal);
  background: rgba(255, 106, 43, 0.1);
  color: var(--paper);
  outline: none;
}

.page-about .manual__link:hover .manual__no,
.page-about .manual__link:focus-visible .manual__no {
  color: var(--signal);
}

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

.page-about .manual__rail-note {
  display: none;
  margin: 16px 0 0;
  font-family: var(--font-ui);
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--about-ink-dim);
}

@media (min-width: 860px) {
  .page-about .manual__rail-kicker,
  .page-about .manual__rail-note {
    display: block;
  }

  .page-about .manual__list {
    display: grid;
    gap: 1px;
    overflow: visible;
    padding: 0;
  }

  .page-about .manual__item {
    flex: none;
  }

  .page-about .manual__link {
    padding: 9px 12px;
    white-space: normal;
  }
}

.page-about .manual__body {
  min-width: 0;
}

/* ---------- 章节 ---------- */
.page-about .chapter {
  padding: clamp(26px, 4vw, 52px) 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--head-h) + var(--rail-h) + 22px);
}

.page-about .chapter:first-child {
  border-top: 0;
  padding-top: clamp(18px, 2.4vw, 26px);
}

.page-about .chapter__path {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--rock);
}

.page-about .chapter__head {
  display: flex;
  align-items: baseline;
  gap: clamp(10px, 1.6vw, 16px);
  margin: 0 0 clamp(14px, 2vw, 20px);
}

.page-about .chapter__no {
  flex: none;
  font-family: var(--font-mono);
  font-size: clamp(13px, 1.4vw, 15px);
  letter-spacing: 0.1em;
  color: var(--signal);
}

.page-about .chapter h2 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(22px, 3.1vw, 32px);
  line-height: 1.24;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .chapter__lede {
  margin: 0 0 clamp(16px, 2.2vw, 24px);
  max-width: 40em;
  font-family: var(--font-body);
  font-size: clamp(15.5px, 1.15vw, 17px);
  line-height: 1.9;
  color: var(--paper);
}

.page-about .chapter__body p,
.page-about .chapter__body--tail {
  margin: 0 0 14px;
  max-width: 40em;
  font-family: var(--font-body);
  font-size: clamp(15.5px, 1.15vw, 17px);
  line-height: 1.9;
  color: var(--about-ink-soft);
}

.page-about .chapter__body--tail {
  margin-top: clamp(18px, 2.4vw, 26px);
  margin-bottom: 0;
}

.page-about .chapter__body--tail a {
  color: var(--signal-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .chapter__body--tail a:hover,
.page-about .chapter__body--tail a:focus-visible {
  color: var(--signal);
  outline: 2px solid var(--signal);
  outline-offset: 3px;
}

/* ---------- 三个常见问题 ---------- */
.page-about .why-list {
  list-style: none;
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

@media (min-width: 760px) {
  .page-about .why-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .why-list__item {
  background: var(--ink);
  border-top: 2px solid var(--signal);
  padding: clamp(14px, 2vw, 22px);
}

.page-about .why-list__item h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .why-list__item p {
  margin: 0;
  font-family: var(--font-ui);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--about-ink-dim);
}

/* ---------- 图 ---------- */
.page-about .about-figure {
  margin: clamp(18px, 2.6vw, 28px) 0 0;
}

.page-about .about-figure .figure__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line-strong);
  background: var(--ink-2);
  object-fit: cover;
}

.page-about .about-figure .figure__caption {
  margin-top: 8px;
  font-family: var(--font-ui);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--rock);
}

/* ---------- 四条原则 ---------- */
.page-about .principles {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(14px, 2vw, 20px);
  margin-top: clamp(18px, 2.6vw, 26px);
}

@media (min-width: 720px) {
  .page-about .principles {
    grid-template-columns: 1.06fr 0.94fr;
    align-items: start;
  }

  .page-about .principles > :nth-child(2) {
    margin-top: clamp(14px, 2.2vw, 28px);
  }

  .page-about .principles > :nth-child(4) {
    margin-top: clamp(14px, 2.2vw, 28px);
  }
}

.page-about .principle {
  position: relative;
  padding: clamp(16px, 2.2vw, 26px);
  background: var(--sheet);
  color: var(--ink);
  border: 1px solid var(--ink-line);
  box-shadow:
    inset 0 1px 0 rgba(244, 241, 232, 0.6),
    0 18px 30px -26px rgba(0, 0, 0, 0.9);
  transition: transform var(--step), box-shadow var(--step);
}

.page-about .principle::after {
  content: "";
  position: absolute;
  top: 12px;
  right: 12px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--signal);
}

.page-about .principle:hover,
.page-about .principle:focus,
.page-about .principle:focus-within {
  transform: translateY(-3px);
  box-shadow:
    inset 0 1px 0 rgba(244, 241, 232, 0.6),
    0 26px 42px -28px rgba(0, 0, 0, 0.95);
}

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

.page-about .principle__tag {
  display: inline-block;
  margin: 0 0 12px;
  padding: 3px 8px;
  border: 1px solid var(--clay);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  color: var(--ink);
}

.page-about .principle__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(20px, 2.3vw, 25px);
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .principle__text {
  margin: 0;
  font-family: var(--font-body);
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(11, 26, 43, 0.84);
}

.page-about .principle__scene {
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  padding-left: 10px;
  border-left: 2px solid var(--signal);
  font-family: var(--font-ui);
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink);
  transition: max-height var(--step), opacity var(--step), margin-top var(--step);
}

.page-about .principle:hover .principle__scene,
.page-about .principle:focus .principle__scene,
.page-about .principle:focus-within .principle__scene {
  max-height: 9em;
  opacity: 1;
  margin-top: 14px;
}

.page-about .principle__scene-label {
  display: inline-block;
  margin-right: 6px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--moss);
}

/* ---------- 资料标准（米白纸页） ---------- */
.page-about .ledger {
  position: relative;
  padding: clamp(18px, 3vw, 34px);
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--sheet);
  box-shadow: 0 28px 52px -38px rgba(0, 0, 0, 0.95);
}

.page-about .ledger::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--signal) 0 68px, var(--clay) 68px 120px, var(--sheet) 120px);
}

.page-about .ledger__intro {
  margin: 0 0 clamp(14px, 2vw, 20px);
  font-family: var(--font-body);
  font-size: clamp(15px, 1.1vw, 16.5px);
  line-height: 1.9;
  color: rgba(11, 26, 43, 0.86);
}

.page-about .ledger__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--ink-line);
  border: 1px solid var(--ink-line);
  margin: clamp(14px, 2vw, 20px) 0;
}

@media (min-width: 680px) {
  .page-about .ledger__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .ledger__cell {
  background: var(--paper);
  padding: 14px 16px;
}

.page-about .ledger__label {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--moss);
}

.page-about .ledger__value {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 22px;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .ledger__note {
  margin: 0;
  font-family: var(--font-ui);
  font-size: 12.5px;
  line-height: 1.7;
  color: rgba(11, 26, 43, 0.66);
}

.page-about .ledger__code {
  display: grid;
  justify-items: start;
  gap: 8px;
  padding: clamp(14px, 2vw, 20px);
  margin: 0 0 clamp(14px, 2vw, 20px);
  background: var(--ink);
  color: var(--paper);
  border-left: 4px solid var(--signal);
}

.page-about .ledger__code-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  color: var(--rock);
}

.page-about .ledger__code-value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(15px, 2.1vw, 21px);
  letter-spacing: 0.06em;
  color: var(--signal-soft);
  word-break: break-all;
}

.page-about .ledger__code .copy-btn {
  margin-top: 2px;
}

.page-about .ledger__code-note {
  margin: 4px 0 0;
  font-family: var(--font-ui);
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--about-ink-dim);
}

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

.page-about .ledger__rules li {
  position: relative;
  padding: 10px 0 10px 20px;
  border-top: 1px solid var(--ink-line);
  font-family: var(--font-ui);
  font-size: 13.5px;
  line-height: 1.8;
  color: rgba(11, 26, 43, 0.82);
}

.page-about .ledger__rules li:last-child {
  border-bottom: 1px solid var(--ink-line);
}

.page-about .ledger__rules li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  width: 8px;
  height: 2px;
  background: var(--signal);
}

/* ---------- 团队 ---------- */
.page-about .crew {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(12px, 1.8vw, 18px);
  margin-top: clamp(18px, 2.6vw, 26px);
}

@media (min-width: 700px) {
  .page-about .crew {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .crew__item {
  padding: clamp(14px, 2vw, 22px);
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-top: 2px solid var(--sage);
}

.page-about .crew__item:nth-child(even) {
  border-top-color: var(--clay);
}

.page-about .crew__no {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  color: var(--rock);
}

.page-about .crew__item h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 19px;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .crew__item p {
  margin: 0;
  font-family: var(--font-ui);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

.page-about .crew__hand {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px dashed var(--line-strong);
  font-family: var(--font-ui);
  font-size: 12.5px;
  color: var(--sage);
}

.page-about .crew__hand-label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--rock);
}

/* ---------- 流程 ---------- */
.page-about .flow {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0 0 10px;
  display: flex;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  border-bottom: 1px solid var(--line);
}

.page-about .flow__step {
  position: relative;
  flex: 1 0 200px;
  padding: 52px 22px 8px 0;
  scroll-snap-align: start;
}

.page-about .flow__step::before {
  content: "";
  position: absolute;
  top: 19px;
  left: 40px;
  right: 8px;
  border-top: 1px dashed var(--line-strong);
}

.page-about .flow__step:last-child::before {
  display: none;
}

.page-about .flow__no {
  position: absolute;
  top: 0;
  left: 0;
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--signal);
  background: var(--ink-2);
  border: 1px solid var(--line-strong);
}

.page-about .flow__step--end .flow__no {
  background: var(--signal);
  border-color: var(--signal);
  color: var(--ink);
}

.page-about .flow__step h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .flow__step p {
  margin: 0;
  font-family: var(--font-ui);
  font-size: 13px;
  line-height: 1.75;
  color: var(--about-ink-dim);
}

.page-about .flow__out {
  margin-top: 10px;
  color: var(--sage);
  font-size: 12.5px;
}

@media (max-width: 640px) {
  .page-about .flow__step {
    flex: 0 0 76%;
    padding-right: 16px;
  }
}

/* ---------- 共建伙伴 ---------- */
.page-about .partners {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 2.6vw, 30px);
}

@media (min-width: 820px) {
  .page-about .partners {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  }
}

.page-about .partners__col p {
  margin: 0 0 14px;
  max-width: 38em;
  font-family: var(--font-body);
  font-size: clamp(15.5px, 1.15vw, 17px);
  line-height: 1.9;
  color: var(--about-ink-soft);
}

.page-about .partners__col--aside {
  padding: clamp(14px, 2vw, 22px);
  background: var(--ink-2);
  border: 1px solid var(--line-strong);
  align-self: start;
}

.page-about .partners__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--signal-soft);
}

.page-about .partners__list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
}

.page-about .partners__list li {
  position: relative;
  padding: 9px 0 9px 18px;
  border-top: 1px dashed var(--line);
  font-family: var(--font-ui);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--about-ink-soft);
}

.page-about .partners__list li:last-child {
  border-bottom: 1px dashed var(--line);
}

.page-about .partners__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 17px;
  width: 6px;
  height: 6px;
  background: var(--signal);
}

/* ---------- 页尾分流 ---------- */
.page-about .about-cta {
  margin-top: clamp(28px, 4vw, 56px);
  padding: clamp(24px, 3.4vw, 44px) 0 clamp(40px, 6vw, 80px);
  border-top: 1px solid var(--line);
}

.page-about .about-cta h2 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(21px, 2.8vw, 28px);
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-cta__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: clamp(16px, 2.2vw, 24px);
}

@media (min-width: 640px) {
  .page-about .about-cta__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1040px) {
  .page-about .about-cta__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-cta__card {
  display: block;
  padding: clamp(14px, 1.8vw, 20px);
  background: rgba(232, 228, 216, 0.03);
  border: 1px solid var(--line);
  border-left: 2px solid var(--line-strong);
  text-decoration: none;
  transition: transform var(--step), border-color var(--step), background-color var(--step);
}

.page-about .about-cta__card:hover,
.page-about .about-cta__card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--signal);
  border-left-color: var(--signal);
  background: rgba(255, 106, 43, 0.08);
  outline: none;
}

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

.page-about .about-cta__no {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--signal);
}

.page-about .about-cta__card h3 {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-cta__card p {
  margin: 0;
  font-family: var(--font-ui);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--about-ink-dim);
}

/* ---------- 降噪 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .principle,
  .page-about .principle__scene,
  .page-about .manual__link,
  .page-about .about-cta__card {
    transition: none;
  }

  .page-about .principle:hover,
  .page-about .principle:focus,
  .page-about .principle:focus-within,
  .page-about .about-cta__card:hover,
  .page-about .about-cta__card:focus-visible {
    transform: none;
  }
}
<<<END>>>