.page-faq {
  --faq-hair: var(--edge);
  --faq-android: var(--bamboo);
  --faq-tablet: var(--ink);
  background: var(--paper);
  color: var(--ink-deep);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.85;
  padding-bottom: 72px;
}

.page-faq .breadcrumb {
  padding-top: 22px;
}

.page-faq .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--stone);
}

.page-faq .breadcrumb__link {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 160ms ease, color 160ms ease;
}

.page-faq .breadcrumb__link:hover,
.page-faq .breadcrumb__link:focus-visible {
  color: var(--cinnabar);
  border-bottom-color: var(--cinnabar);
}

.page-faq .breadcrumb__sep {
  color: var(--stone);
}

.page-faq .breadcrumb__current {
  color: var(--ink-deep);
}

/* 首屏 */
.page-faq .faq-hero {
  padding: 26px 0 44px;
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: 34px;
}

.page-faq .faq-hero__title {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: clamp(30px, 7vw, 58px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 16px 0 18px;
}

.page-faq .faq-hero__lede {
  max-width: 46ch;
  margin: 0 0 26px;
  font-size: 16px;
  color: var(--ink-deep);
}

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

.page-faq .faq-hero__side {
  border-top: 2px solid var(--ink);
  padding-top: 16px;
}

.page-faq .faq-hero__side-label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--stone);
}

.page-faq .faq-facts {
  margin: 0;
}

.page-faq .faq-facts__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--faq-hair);
}

.page-faq .faq-facts__row:last-child {
  border-bottom: 0;
}

.page-faq .faq-facts dt {
  font-size: 13px;
  color: var(--stone);
  flex: none;
}

.page-faq .faq-facts dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink);
  text-align: right;
}

/* 目录条 */
.page-faq .faq-toc {
  position: sticky;
  top: var(--topbar-h);
  z-index: 5;
  background: var(--paper);
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .faq-toc__list {
  display: flex;
  gap: 22px;
  margin: 0;
  padding: 12px 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-toc__item {
  flex: none;
}

.page-faq .faq-toc__link {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  white-space: nowrap;
  padding-bottom: 3px;
  border-bottom: 2px solid transparent;
  font-size: 13px;
  color: var(--ink);
  text-decoration: none;
  transition: color 160ms ease, border-color 160ms ease;
}

.page-faq .faq-toc__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--stone);
}

.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible,
.page-faq .faq-toc__link[aria-current="true"] {
  color: var(--cinnabar);
  border-bottom-color: var(--cinnabar);
}

.page-faq .faq-toc__link:hover .faq-toc__idx,
.page-faq .faq-toc__link[aria-current="true"] .faq-toc__idx {
  color: var(--cinnabar);
}

/* 章节外壳 */
.page-faq .faq-section {
  padding: 48px 0;
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .faq-section:last-of-type {
  border-bottom: 0;
}

.page-faq .faq-section__head {
  max-width: 60ch;
  margin-bottom: 30px;
}

.page-faq .faq-section__idx {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cinnabar);
}

.page-faq .faq-section__title {
  margin: 0 0 8px;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: clamp(23px, 4.6vw, 36px);
  line-height: 1.32;
  color: var(--ink);
}

.page-faq .faq-section__en {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--stone);
}

.page-faq .faq-section__lede {
  margin: 0;
  color: var(--ink-deep);
}

/* 准备清单 */
.page-faq .prep {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-faq .prep__item {
  background: var(--paper-card);
  border: 1px solid var(--faq-hair);
  padding: 22px 20px 24px;
  transition: transform 200ms ease, box-shadow 200ms ease, border-color 200ms ease;
}

.page-faq .prep__item:hover {
  transform: translate(-2px, -2px);
  border-color: var(--gold);
  box-shadow: var(--shadow-paper);
}

.page-faq .prep__key {
  display: inline-block;
  margin-bottom: 12px;
  padding: 1px 9px;
  background: var(--ink);
  color: var(--paper-card);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-faq .prep__title {
  margin: 0 0 8px;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 19px;
  color: var(--ink);
}

.page-faq .prep__body {
  margin: 0;
  font-size: 15px;
}

.page-faq .prep__note {
  margin: 22px 0 0;
  font-size: 14px;
  color: var(--stone);
}

.page-faq .prep__note a {
  color: var(--cinnabar);
  text-decoration: none;
  border-bottom: 1px solid var(--cinnabar-soft);
}

.page-faq .prep__note a:hover {
  border-bottom-color: var(--cinnabar);
}

/* 双轨步骤 */
.page-faq .track {
  display: grid;
  gap: 28px;
}

.page-faq .steps {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .steps__item {
  position: relative;
  padding: 0 0 32px 56px;
}

.page-faq .steps__item:last-child {
  padding-bottom: 0;
}

.page-faq .steps__item::after {
  content: "";
  position: absolute;
  left: 17px;
  top: 40px;
  bottom: 0;
  width: 1px;
  background: var(--faq-hair);
}

.page-faq .steps__item:last-child::after {
  display: none;
}

.page-faq .steps__num {
  position: absolute;
  left: 0;
  top: 0;
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  background: var(--paper-card);
  border: 1px solid var(--faq-hair);
  border-left-width: 3px;
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.page-faq .track--android .steps__num {
  border-left-color: var(--faq-android);
}

.page-faq .track--tablet .steps__num {
  border-left-color: var(--faq-tablet);
}

.page-faq .steps__title {
  margin: 4px 0 6px;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.4;
  color: var(--ink);
}

.page-faq .steps__body {
  margin: 0;
  max-width: 46ch;
  font-size: 15px;
}

.page-faq .figure {
  margin: 0;
}

.page-faq .figure__frame {
  background: var(--paper-card);
  border: 1px solid var(--faq-hair);
  padding: 10px;
  box-shadow: var(--shadow-paper);
}

.page-faq .figure__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .figure__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--stone);
}

/* 对照表阅读指引 */
.page-faq .ledger-guide {
  display: grid;
  gap: 28px;
}

.page-faq .legend {
  background: var(--paper-card);
  border: 1px solid var(--faq-hair);
}

.page-faq .legend__item {
  display: flex;
  gap: 14px;
  padding: 18px;
}

.page-faq .legend__item--old {
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .legend__swatch {
  flex: none;
  width: 14px;
  align-self: stretch;
  border-radius: 2px;
}

.page-faq .legend__item--old .legend__swatch {
  background: var(--indigo);
}

.page-faq .legend__item--new .legend__swatch {
  background: var(--cinnabar);
}

.page-faq .legend__text {
  font-size: 14px;
  color: var(--ink-deep);
}

.page-faq .legend__text strong {
  display: block;
  margin-bottom: 2px;
  font-family: var(--font-title);
  font-size: 16px;
  color: var(--ink);
}

.page-faq .readsteps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: read;
}

.page-faq .readsteps__item {
  counter-increment: read;
  position: relative;
  padding-left: 44px;
  margin-bottom: 22px;
}

.page-faq .readsteps__item:last-child {
  margin-bottom: 0;
}

.page-faq .readsteps__item::before {
  content: counter(read, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 3px;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  background: var(--paper-card);
  border: 1px solid var(--faq-hair);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.02em;
  color: var(--stone);
}

.page-faq .readsteps__title {
  margin: 0 0 4px;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 18px;
  color: var(--ink);
}

.page-faq .readsteps__item p {
  margin: 0;
  max-width: 52ch;
  font-size: 15px;
}

.page-faq .ledger-guide__more {
  margin: 0;
  padding-top: 16px;
  border-top: 1px solid var(--faq-hair);
  font-size: 14px;
  color: var(--stone);
}

.page-faq .ledger-guide__more a {
  color: var(--cinnabar);
  text-decoration: none;
  border-bottom: 1px solid var(--cinnabar-soft);
}

.page-faq .ledger-guide__more a:hover {
  border-bottom-color: var(--cinnabar);
}

/* 常见问题折叠 */
.page-faq .trouble {
  border-top: 1px solid var(--faq-hair);
}

.page-faq .trouble__item {
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .trouble__q {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 20px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.5;
  color: var(--ink);
  transition: color 160ms ease;
}

.page-faq .trouble__q::-webkit-details-marker {
  display: none;
}

.page-faq .trouble__q::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--cinnabar);
}

.page-faq .trouble__item[open] .trouble__q::after {
  content: "–";
}

.page-faq .trouble__q:hover,
.page-faq .trouble__q:focus-visible {
  color: var(--cinnabar);
}

.page-faq .trouble__a {
  max-width: 62ch;
  padding: 0 0 22px;
}

.page-faq .trouble__a p {
  margin: 0 0 10px;
  font-size: 15px;
}

.page-faq .trouble__a p:last-child {
  margin-bottom: 0;
}

.page-faq .trouble__hint {
  margin: 22px 0 0;
  font-size: 13px;
  color: var(--stone);
}

/* 联系客服 */
.page-faq .help {
  display: grid;
  gap: 30px;
  padding: 26px 22px;
  background: var(--paper-card);
  border: 1px solid var(--faq-hair);
  border-left: 4px solid var(--cinnabar);
}

.page-faq .help__copy p {
  margin: 0 0 12px;
  max-width: 46ch;
  font-size: 15px;
}

.page-faq .help__copy a {
  color: var(--cinnabar);
  text-decoration: none;
  border-bottom: 1px solid var(--cinnabar-soft);
}

.page-faq .help__copy a:hover {
  border-bottom-color: var(--cinnabar);
}

.page-faq .help__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--stone);
}

.page-faq .help__mail {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: clamp(14px, 3.6vw, 19px);
  letter-spacing: 0.02em;
  color: var(--ink);
  word-break: break-all;
}

.page-faq .help__copy-btn {
  margin-bottom: 20px;
}

.page-faq .help__phone {
  margin: 18px 0 8px;
  font-family: var(--font-mono);
  font-size: clamp(19px, 4.4vw, 26px);
  letter-spacing: 0.05em;
  color: var(--ink);
}

.page-faq .help__meta {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--stone);
}

@media (min-width: 760px) {
  .page-faq .prep {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

  .page-faq .faq-hero__actions {
    gap: 16px;
  }

  .page-faq .trouble__q {
    font-size: 19px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: 34px 0 56px;
  }

  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.78fr);
    align-items: end;
    gap: 64px;
  }

  .page-faq .faq-section {
    padding: 64px 0;
  }

  .page-faq .track {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.72fr);
    gap: 56px;
    align-items: start;
  }

  .page-faq .track__media {
    position: sticky;
    top: 96px;
  }

  .page-faq .ledger-guide {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .ledger-guide__more {
    grid-column: 1 / -1;
  }

  .page-faq .help {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    gap: 48px;
    padding: 40px 36px;
  }

  .page-faq .faq-toc {
    top: 0;
  }
}

@media (max-width: 480px) {
  .page-faq .steps__item {
    padding-left: 46px;
  }

  .page-faq .steps__num {
    width: 32px;
    height: 32px;
    font-size: 11px;
  }

  .page-faq .steps__item::after {
    left: 15px;
    top: 36px;
  }

  .page-faq .readsteps__item {
    padding-left: 38px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .prep__item,
  .page-faq .breadcrumb__link,
  .page-faq .faq-toc__link,
  .page-faq .trouble__q {
    transition: none;
  }

  .page-faq .prep__item:hover {
    transform: none;
  }
}
<<<END>>>