.page-faq {
  --faq-hair: rgba(195, 205, 214, 0.24);
  --faq-tick: rgba(195, 205, 214, 0.45);
  --faq-gap: 16px;
  background-color: var(--surface);
  color: var(--text);
  overflow-x: hidden;
}

/* ---------- 首屏框景 ---------- */
.page-faq .faq-hero {
  position: relative;
  background-color: var(--ink);
  color: var(--on-dark);
  padding: 18px 0 0;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 5px;
  background-image: repeating-linear-gradient(90deg, var(--cyan) 0 1px, transparent 1px 16px);
  opacity: 0.45;
  pointer-events: none;
}

.page-faq .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--on-dark-soft);
}

.page-faq .breadcrumbs a {
  color: var(--on-dark-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

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

.page-faq .breadcrumbs__sep {
  color: rgba(147, 163, 178, 0.6);
}

.page-faq .faq-frame {
  position: relative;
  margin: 18px 0 0;
  padding: 28px 18px 22px;
  background-color: var(--panel);
  border: 1px solid var(--faq-hair);
  border-left: 3px solid var(--cyan);
  border-radius: var(--r);
}

.page-faq .faq-frame::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -3px;
  width: 92px;
  height: 4px;
  background-color: var(--cyan);
  opacity: 0.85;
}

.page-faq .faq-frame__kicker {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-faq .faq-frame__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 30px;
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-frame__lede {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--on-dark-soft);
}

.page-faq .faq-statline {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 24px 0 0;
  padding: 0;
  background-color: var(--faq-hair);
  border: 1px solid var(--faq-hair);
  border-radius: var(--r);
  overflow: hidden;
}

.page-faq .faq-statline__cell {
  background-color: var(--ink);
  padding: 11px 12px 12px;
}

.page-faq .faq-statline dt {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--on-dark-soft);
}

.page-faq .faq-statline dd {
  margin: 5px 0 0;
  font-size: 18px;
  line-height: 1.2;
  color: var(--cyan);
}

/* ---------- 区块通用 ---------- */
.page-faq .faq-index,
.page-faq .faq-manual {
  padding: 42px 0 48px;
}

.page-faq .faq-how,
.page-faq .faq-prep-section {
  padding: 42px 0 48px;
  background-color: var(--paper);
}

.page-faq .faq-update {
  padding: 42px 0 48px;
  background-color: var(--ink);
  color: var(--on-dark);
}

.page-faq .faq-update .section__kicker {
  color: var(--cyan);
}

.page-faq .faq-update .section__title {
  color: var(--paper);
}

.page-faq .faq-update .section__note {
  color: var(--on-dark-soft);
}

.page-faq .faq-index__fig {
  margin: 0 0 26px;
}

/* ---------- 五类索引 ---------- */
.page-faq .faq-cats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: 1px solid var(--line);
}

.page-faq .faq-cats__item {
  min-width: 0;
}

.page-faq .faq-cats__link {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  padding: 15px 10px 15px 18px;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  color: var(--text);
  transition: background-color var(--dur) var(--ease);
}

.page-faq .faq-cats__link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 2px;
  background-color: var(--line);
  transition: width var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-cats__link:hover,
.page-faq .faq-cats__link:focus-visible {
  background-color: rgba(0, 229, 200, 0.07);
}

.page-faq .faq-cats__link:hover::before,
.page-faq .faq-cats__link:focus-visible::before {
  width: 3px;
  background-color: var(--cyan);
}

.page-faq .faq-cats__num {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan-ink);
}

.page-faq .faq-cats__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.35;
  color: var(--text);
}

.page-faq .faq-cats__count {
  margin-left: auto;
  font-size: 12px;
  color: var(--muted);
}

.page-faq .faq-cats__hint {
  flex: 1 0 100%;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 三步读法 ---------- */
.page-faq .faq-how__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  align-items: start;
}

.page-faq .faq-how__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 24px;
  line-height: 1.22;
  color: var(--text);
}

.page-faq .faq-how__lede {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
}

.page-faq .faq-how__legend {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-how__legend li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-how__tag {
  justify-self: start;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan-ink);
  padding-left: 8px;
  border-left: 2px solid var(--cyan);
  line-height: 1.4;
}

.page-faq .faq-how__desc {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
}

.page-faq .faq-how__cross {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-how__cross a,
.page-faq .faq-update__link a,
.page-faq .faq-steps a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(30, 91, 214, 0.35);
}

.page-faq .faq-steps a {
  color: var(--blue);
}

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

/* ---------- 手册列表 ---------- */
.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 20px;
  padding: 11px 12px;
  background-color: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--r);
}

.page-faq .faq-filter:focus {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .faq-filter .filter-bar__label {
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-faq .filter-btn {
  appearance: none;
  border: 1px solid var(--line);
  background-color: transparent;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.4;
  padding: 5px 11px;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .filter-btn:hover {
  border-color: var(--cyan);
  color: var(--cyan-ink);
}

.page-faq .filter-btn[aria-pressed="true"] {
  background-color: var(--orange);
  border-color: var(--orange);
  color: #FFFFFF;
}

.page-faq .faq-list {
  border-top: 1px solid var(--line);
}

.page-faq .faq-group {
  margin: 26px 0 0;
  padding: 0 0 9px 12px;
  font-size: 12px;
  letter-spacing: 0.06em;
  line-height: 1.5;
  color: var(--muted);
  border-left: 3px solid var(--cyan);
}

.page-faq .faq-group:first-child {
  margin-top: 18px;
}

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

.page-faq .faq-item__btn {
  position: relative;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  grid-template-rows: auto auto;
  gap: 2px 10px;
  width: 100%;
  padding: 15px 6px 15px 16px;
  background-color: transparent;
  border: 0;
  text-align: left;
  cursor: pointer;
  color: var(--text);
}

.page-faq .faq-item__btn::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  width: 2px;
  height: 16px;
  background-color: var(--faq-tick);
  transition: height 200ms var(--ease), background-color 200ms var(--ease);
}

.page-faq .faq-item__btn[aria-expanded="true"]::before {
  height: calc(100% - 28px);
  background-color: var(--cyan);
}

.page-faq .faq-item__btn:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .fold__idx {
  grid-column: 1;
  grid-row: 1 / span 2;
  align-self: start;
  padding-top: 4px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-faq .faq-item__title {
  grid-column: 2;
  grid-row: 1;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.45;
  color: var(--text);
}

.page-faq .faq-item__cat {
  grid-column: 2;
  grid-row: 2;
  font-size: 11px;
  letter-spacing: 0.06em;
  line-height: 1.4;
  color: var(--muted);
}

.page-faq .faq-item[hidden] {
  display: none;
}

.page-faq .faq-steps {
  margin: 0;
  padding: 2px 0 0 14px;
  border-left: 2px solid var(--faq-hair);
}

.page-faq .faq-steps dt {
  position: relative;
  margin: 14px 0 5px;
  font-size: 11px;
  letter-spacing: 0.06em;
  line-height: 1.4;
  color: var(--cyan-ink);
}

.page-faq .faq-steps dt:first-of-type {
  margin-top: 0;
}

.page-faq .faq-steps dt::before {
  content: "";
  position: absolute;
  left: -18px;
  top: 7px;
  width: 9px;
  height: 1px;
  background-color: var(--line);
}

.page-faq .faq-steps dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
}

.page-faq .faq-more {
  margin: 22px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 时段差 ---------- */
.page-faq .faq-update__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-update__cell {
  padding: 16px 16px 18px;
  background-color: var(--panel);
  border: 1px solid var(--faq-hair);
  border-left: 3px solid var(--cyan);
  border-radius: var(--r);
}

.page-faq .faq-update__cell .bento__index {
  display: block;
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-faq .faq-update__cell .bento__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.35;
  color: var(--paper);
}

.page-faq .faq-update__cell .bento__body {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--on-dark-soft);
}

.page-faq .faq-update__cell .bento__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 200, 0.4);
}

.page-faq .faq-update__link {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--on-dark-soft);
}

.page-faq .faq-update__link a {
  color: var(--cyan);
  border-bottom-color: rgba(0, 229, 200, 0.4);
}

/* ---------- 提交前清单 ---------- */
.page-faq .faq-prep {
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  border-radius: var(--r);
  padding: 22px 18px 24px;
}

.page-faq .faq-prep__kicker {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--orange-ink);
}

.page-faq .faq-prep__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 23px;
  line-height: 1.24;
  color: var(--text);
}

.page-faq .faq-prep__lede {
  margin: 0;
  max-width: 58ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-checklist {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-faq .faq-checklist li {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  font-size: 15px;
  line-height: 1.65;
  color: var(--text);
}

.page-faq .faq-check {
  width: 14px;
  height: 14px;
  margin-top: 4px;
  border: 1px solid var(--line);
  border-radius: 3px;
  background-color: var(--paper);
}

.page-faq .faq-prep__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-faq .faq-prep__actions .btn {
  font-size: 14px;
  padding: 9px 16px;
  border-radius: 4px;
  text-decoration: none;
  line-height: 1.4;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: var(--font-body);
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-prep__actions .btn--primary {
  background-color: var(--orange);
  border-color: var(--orange);
  color: #FFFFFF;
}

.page-faq .faq-prep__actions .btn--primary:hover {
  background-color: var(--orange-ink);
  border-color: var(--orange-ink);
}

.page-faq .faq-prep__actions .btn--ghost {
  background-color: transparent;
  border-color: var(--line);
  color: var(--text);
}

.page-faq .faq-prep__actions .btn--ghost:hover {
  border-color: var(--cyan);
  color: var(--cyan-ink);
}

.page-faq .faq-prep__note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero {
    padding-top: 22px;
  }

  .page-faq .faq-frame {
    padding: 36px 30px 26px;
  }

  .page-faq .faq-frame__title {
    font-size: 40px;
    line-height: 1.1;
  }

  .page-faq .faq-frame__lede {
    font-size: 17px;
  }

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

  .page-faq .faq-statline dd {
    font-size: 20px;
  }

  .page-faq .faq-index,
  .page-faq .faq-manual,
  .page-faq .faq-how,
  .page-faq .faq-prep-section,
  .page-faq .faq-update {
    padding: 58px 0 64px;
  }

  .page-faq .faq-cats {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-faq .faq-cats__item {
    border-right: 1px solid var(--line);
  }

  .page-faq .faq-cats__item:last-child {
    border-right: 0;
  }

  .page-faq .faq-cats__link {
    flex-direction: column;
    align-items: flex-start;
    height: 100%;
    padding: 20px 14px 22px 16px;
    border-bottom: 0;
  }

  .page-faq .faq-cats__link::before {
    top: 0;
    bottom: 0;
  }

  .page-faq .faq-cats__count {
    margin-left: 0;
  }

  .page-faq .faq-cats__hint {
    flex: 0 0 auto;
    margin-top: 4px;
  }

  .page-faq .faq-how__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 36px;
  }

  .page-faq .faq-how__legend li {
    grid-template-columns: 74px minmax(0, 1fr);
    gap: 14px;
    align-items: baseline;
  }

  .page-faq .faq-how__tag {
    justify-self: stretch;
    text-align: left;
  }

  .page-faq .faq-item__btn {
    grid-template-columns: 56px minmax(0, 1fr) auto;
    grid-template-rows: auto;
    gap: 0 14px;
    align-items: baseline;
    padding: 17px 10px 17px 20px;
  }

  .page-faq .fold__idx {
    grid-column: 1;
    grid-row: 1;
    padding-top: 3px;
  }

  .page-faq .faq-item__title {
    grid-column: 2;
    grid-row: 1;
    font-size: 17px;
  }

  .page-faq .faq-item__cat {
    grid-column: 3;
    grid-row: 1;
    margin-top: 0;
  }

  .page-faq .fold__inner {
    padding-left: 90px;
    padding-right: 24px;
  }

  .page-faq .faq-steps {
    max-width: 74ch;
  }

  .page-faq .faq-update__grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 14px;
  }

  .page-faq .faq-update__cell--wide {
    grid-column: span 4;
  }

  .page-faq .faq-update__cell:not(.faq-update__cell--wide):not(.faq-update__cell--full) {
    grid-column: span 2;
  }

  .page-faq .faq-update__cell--full {
    grid-column: span 6;
  }

  .page-faq .faq-prep {
    padding: 32px 34px 34px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-frame {
    padding: 44px 40px 32px;
  }

  .page-faq .faq-frame__title {
    font-size: 46px;
  }

  .page-faq .faq-how__title,
  .page-faq .faq-prep__title {
    font-size: 26px;
  }

  .page-faq .faq-prep__title {
    font-size: 27px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__btn::before,
  .page-faq .faq-cats__link,
  .page-faq .faq-cats__link::before,
  .page-faq .filter-btn,
  .page-faq .faq-prep__actions .btn,
  .page-faq .breadcrumbs a {
    transition: none;
  }
}