.page-faq {
  --accent: var(--ice);
  --accent-soft: rgba(69, 214, 255, .12);
  --accent-line: rgba(69, 214, 255, .45);
  --faq-dim: #AFC2D2;
  --faq-line: var(--line);
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-faq .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-head {
  padding-top: clamp(22px, 4vw, 44px);
  padding-bottom: clamp(30px, 5vw, 56px);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-head__grid {
  display: grid;
  gap: 26px;
  margin-top: 20px;
}

.page-faq .faq-head h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 8.2vw, 54px);
  line-height: 1.05;
  letter-spacing: -.02em;
  color: var(--text);
}

.page-faq .faq-lede {
  margin: 16px 0 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--faq-dim);
}

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

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

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 12px 2px;
  color: var(--faq-dim);
  text-decoration: none;
  font-size: 14px;
  transition: color .18s var(--ease), padding-left .18s var(--ease);
}

.page-faq .faq-index__link .mono {
  color: var(--accent);
  font-size: 12px;
  letter-spacing: .06em;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--text);
  padding-left: 8px;
  outline: none;
}

.page-faq .faq-index__link:focus-visible {
  box-shadow: inset 2px 0 0 var(--cyan);
}

/* ---------- 通用区块 ---------- */

.page-faq .faq-block {
  padding-top: clamp(34px, 6vw, 66px);
  padding-bottom: clamp(34px, 6vw, 66px);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .section-head {
  margin-bottom: clamp(22px, 4vw, 34px);
}

.page-faq .section-title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(23px, 5.4vw, 36px);
  line-height: 1.12;
  letter-spacing: -.015em;
  color: var(--text);
}

.page-faq .section-note {
  margin: 12px 0 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 配图 ---------- */

.page-faq .faq-figure {
  margin: 0 0 clamp(22px, 4vw, 34px);
}

.page-faq .media__frame {
  border: 1px solid var(--faq-line);
  background: var(--panel);
  overflow: hidden;
  display: block;
}

.page-faq .media__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(.9) contrast(1.04);
}

.page-faq .media__caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 四步走带 ---------- */

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

.page-faq .step-rail__item {
  position: relative;
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 14px;
  padding: 20px 0;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .step-rail__item::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 56px;
  bottom: -1px;
  width: 1px;
  background: var(--accent-line);
}

.page-faq .step-rail__item:last-child::before {
  display: none;
}

.page-faq .step-rail__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 34px;
  border: 1px solid var(--accent-line);
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 13px;
  letter-spacing: .08em;
}

.page-faq .step-rail__title {
  margin: 4px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.2;
  letter-spacing: -.01em;
}

.page-faq .step-rail__text {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--faq-dim);
}

.page-faq .step-rail__check {
  margin: 12px 0 0;
  padding-top: 10px;
  border-top: 1px dashed var(--line-strong);
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--muted);
}

.page-faq .step-rail__k {
  display: inline-block;
  margin-right: 8px;
  padding: 1px 7px;
  border: 1px solid var(--accent-line);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
}

/* ---------- 筛选条 ---------- */

.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.page-faq .faq-filter .filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 13px;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--faq-dim);
  font-family: var(--font-body);
  font-size: 13.5px;
  line-height: 1;
  cursor: pointer;
  transition: border-color .18s var(--ease), color .18s var(--ease), background .18s var(--ease);
}

.page-faq .faq-filter .filter-btn:hover,
.page-faq .faq-filter .filter-btn:focus-visible {
  border-color: var(--accent-line);
  color: var(--text);
}

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

.page-faq .faq-filter .filter-btn.is-active {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--text);
}

.page-faq .faq-filter .filter-count {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--muted);
}

.page-faq .faq-filter .filter-btn.is-active .filter-count {
  color: var(--accent);
}

/* ---------- 问答折叠 ---------- */

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

.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-line);
  border-left: 2px solid transparent;
  padding-left: 0;
  transition: border-left-color .2s var(--ease), background .2s var(--ease);
}

.page-faq .faq-item:has(.fold__head[aria-expanded="true"]) {
  border-left-color: var(--accent);
  background: linear-gradient(90deg, var(--accent-soft), transparent 42%);
}

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

.page-faq .faq-item.is-in {
  animation: faqFade .12s var(--ease) both;
}

@keyframes faqFade {
  from { opacity: 0; }
  to { opacity: 1; }
}

.page-faq .fold__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 18px 4px;
  border: 0;
  background: transparent;
  text-align: left;
  cursor: pointer;
  color: var(--text);
}

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

.page-faq .fold__q {
  font-size: 16px;
  line-height: 1.55;
  font-weight: 600;
  color: var(--text);
}

.page-faq .fold__icon {
  position: relative;
  flex: none;
  width: 14px;
  height: 14px;
  margin-top: 6px;
}

.page-faq .fold__icon::before,
.page-faq .fold__icon::after {
  content: "";
  position: absolute;
  background: var(--muted);
  transition: transform .2s var(--ease), background .2s var(--ease);
}

.page-faq .fold__icon::before {
  left: 0;
  top: 6.5px;
  width: 14px;
  height: 1px;
}

.page-faq .fold__icon::after {
  top: 0;
  left: 6.5px;
  width: 1px;
  height: 14px;
}

.page-faq .fold__head[aria-expanded="true"] .fold__icon::before,
.page-faq .fold__head[aria-expanded="true"] .fold__icon::after {
  background: var(--accent);
}

.page-faq .fold__head[aria-expanded="true"] .fold__icon::after {
  transform: scaleY(0);
}

.page-faq .fold__body {
  padding: 0 4px 20px;
  border-top: 1px dashed transparent;
}

.page-faq .fold__head[aria-expanded="true"] + .fold__body {
  border-top-color: var(--line-strong);
  padding-top: 14px;
}

.page-faq .fold__body p {
  margin: 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--faq-dim);
}

/* ---------- 七项安全项 ---------- */

.page-faq .sec-grid {
  display: grid;
  gap: 28px;
}

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

.page-faq .sec-list__item {
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 12px;
  padding: 18px 2px;
  border-bottom: 1px solid var(--faq-line);
  transition: background .2s var(--ease);
}

.page-faq .sec-list__item:hover {
  background: rgba(30, 42, 56, .35);
}

.page-faq .sec-list__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 30px;
  border: 1px solid var(--line-strong);
  color: var(--accent);
  font-size: 12.5px;
  letter-spacing: .08em;
  background: var(--panel);
}

.page-faq .sec-list__name {
  margin: 3px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.2;
  letter-spacing: -.01em;
}

.page-faq .sec-list__line {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--faq-dim);
}

.page-faq .sec-list__k {
  display: inline-block;
  min-width: 54px;
  margin-right: 10px;
  padding: 1px 6px;
  border: 1px solid var(--line-strong);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  text-align: center;
}

.page-faq .sec-side__figure {
  margin: 0;
}

.page-faq .sec-side__note {
  margin-top: 18px;
  padding: 16px 16px 18px;
  border: 1px solid var(--line-strong);
  border-left: 2px solid var(--accent);
  background: var(--panel);
}

.page-faq .sec-side__note-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -.01em;
}

.page-faq .sec-side__note p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--faq-dim);
}

.page-faq .sec-side__note-tag {
  margin-top: 12px;
  color: var(--accent);
  font-size: 13px;
  letter-spacing: .12em;
}

/* ---------- 可复制清单 ---------- */

.page-faq .checklist-block {
  margin-top: clamp(26px, 4vw, 40px);
  border: 1px solid var(--line-strong);
  background: var(--panel);
}

.page-faq .checklist-block__head {
  padding: 18px 18px 0;
}

.page-faq .checklist-block__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -.01em;
}

.page-faq .checklist-block__text {
  margin: 10px 0 0;
  max-width: 60ch;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--muted);
}

.page-faq .checklist-block .btn--copy {
  margin: 16px 0 0;
}

.page-faq .checklist-block .btn--copy.is-copied {
  border-color: var(--cyan);
  color: var(--cyan);
}

.page-faq .faq-checklist {
  margin: 18px 0 0;
  padding: 18px;
  border-top: 1px solid var(--line-strong);
  background: var(--panel-2);
  color: var(--faq-dim);
  font-size: 13px;
  line-height: 2.05;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-x: auto;
}

/* ---------- 记录与归档 ---------- */

.page-faq .record-grid {
  display: grid;
  gap: 18px;
}

.page-faq .record-card {
  padding: 20px 18px 22px;
  border: 1px solid var(--line-strong);
  background: var(--panel);
}

.page-faq .record-card__kicker {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--accent);
}

.page-faq .record-card__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 21px;
  line-height: 1.18;
  letter-spacing: -.01em;
}

.page-faq .record-card__text {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--faq-dim);
}

.page-faq .record-card__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-faq .record-card__list li {
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
  font-size: 13.5px;
  line-height: 1.68;
  color: var(--muted);
}

.page-faq .record-card__list .mono {
  display: inline-block;
  min-width: 72px;
  margin-right: 10px;
  color: var(--text);
  font-size: 12px;
  letter-spacing: .04em;
}

.page-faq .record-card__foot {
  margin: 16px 0 0;
}

.page-faq .search-hint {
  margin-top: clamp(24px, 4vw, 36px);
  padding: 20px 18px;
  border: 1px solid var(--line-strong);
  background: linear-gradient(140deg, var(--panel-2), var(--panel));
}

.page-faq .search-hint__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -.01em;
}

.page-faq .search-hint__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
}

.page-faq .search-hint__row:last-child {
  border-bottom: 1px solid var(--line);
}

.page-faq .search-hint__text {
  flex: 1 1 240px;
  font-size: 13.5px;
  line-height: 1.68;
  color: var(--muted);
}

.page-faq .search-hint .tag--accent {
  border: 1px solid var(--accent-line);
  background: var(--accent-soft);
  color: var(--accent);
  padding: 2px 9px;
  font-size: 12px;
  letter-spacing: .04em;
}

/* ---------- 来问之前 ---------- */

.page-faq .prep-grid {
  display: grid;
  gap: 24px;
}

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

.page-faq .prep-list__item {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 12px;
  padding: 16px 2px;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .prep-list__num {
  color: var(--muted);
  font-size: 12.5px;
  letter-spacing: .08em;
  padding-top: 3px;
}

.page-faq .prep-list__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--faq-dim);
}

.page-faq .prep-list__k {
  display: block;
  margin-bottom: 4px;
  font-weight: 600;
  color: var(--text);
}

.page-faq .prep-cta {
  padding: 22px 18px;
  border: 1px solid var(--line-strong);
  border-top: 2px solid var(--accent);
  background: var(--panel);
}

.page-faq .prep-cta__text {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.76;
  color: var(--faq-dim);
}

.page-faq .prep-cta .cta-band__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.page-faq .prep-cta .btn {
  text-decoration: none;
}

.page-faq .prep-cta .btn--accent {
  background: var(--accent);
  color: var(--on-accent);
  border-color: var(--accent);
}

.page-faq .prep-cta .btn--ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--line-strong);
}

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

/* ---------- 桌面端 ---------- */

@media (min-width: 880px) {
  .page-faq .faq-head__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(240px, .85fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-head__index {
    margin-top: 10px;
  }

  .page-faq .step-rail {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    border-top: 1px solid var(--faq-line);
    border-bottom: 1px solid var(--faq-line);
  }

  .page-faq .step-rail__item {
    display: block;
    padding: 24px 20px 26px;
    border-bottom: 0;
    border-right: 1px solid var(--faq-line);
  }

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

  .page-faq .step-rail__item::before {
    display: none;
  }

  .page-faq .step-rail__num {
    width: 46px;
  }

  .page-faq .step-rail__title {
    margin-top: 16px;
  }

  .page-faq .sec-grid {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 44px;
    align-items: start;
  }

  .page-faq .sec-grid__side {
    position: sticky;
    top: 92px;
  }

  .page-faq .record-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

  .page-faq .prep-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: 36px;
    align-items: start;
  }

  .page-faq .faq-checklist {
    font-size: 13.5px;
  }
}

@media (min-width: 1100px) {
  .page-faq .checklist-block {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: start;
  }

  .page-faq .checklist-block__head {
    padding: 24px 24px 24px;
  }

  .page-faq .faq-checklist {
    margin: 0;
    border-top: 0;
    border-left: 1px solid var(--line-strong);
    padding: 24px 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item.is-in {
    animation: none;
  }

  .page-faq .faq-index__link,
  .page-faq .filter-btn,
  .page-faq .fold__icon::before,
  .page-faq .fold__icon::after,
  .page-faq .sec-list__item {
    transition: none;
  }
}