.page-faq {
  --faq-card-pad: 22px;
  --faq-radius: var(--radius-lg);
  --faq-hair-soft: rgba(26, 31, 46, .13);
  background: var(--paper);
  color: var(--ink);
  padding-bottom: 88px;
  overflow-x: clip;
}

@media (min-width: 768px) {
  .page-faq {
    --faq-card-pad: 40px;
  }
}

/* ---------- 页首 ---------- */

.page-faq .faq-masthead {
  padding: 26px 0 40px;
  border-bottom: 1px solid var(--hair);
}

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

@media (min-width: 960px) {
  .page-faq .faq-masthead-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 52px;
    align-items: end;
  }
}

.page-faq .faq-masthead-main .h-display {
  margin: 14px 0 0;
}

.page-faq .faq-masthead-main .lede {
  margin-top: 16px;
  max-width: 58ch;
}

.page-faq .faq-masthead-aside {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-left: 18px;
  border-left: 2px solid var(--pulse);
}

.page-faq .faq-status {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  align-self: flex-start;
  margin: 0;
  padding: 9px 16px;
  border-radius: var(--radius-pill);
  background: var(--ink);
  color: var(--paper);
  font-size: 12.5px;
  letter-spacing: .01em;
}

.page-faq .faq-status-dot {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--pulse);
  box-shadow: 0 0 0 3px rgba(53, 214, 164, .22);
  animation: faq-pulse 2.6s var(--ease) infinite;
}

@keyframes faq-pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(53, 214, 164, .22); }
  50% { box-shadow: 0 0 0 8px rgba(53, 214, 164, .04); }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-status-dot {
    animation: none;
  }
}

.page-faq .faq-aside-line {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-muted);
}

/* ---------- 布局 ---------- */

.page-faq .faq-layout {
  display: grid;
  gap: 30px;
  padding-top: 40px;
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: 214px minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }
}

.page-faq .faq-flow {
  display: flex;
  flex-direction: column;
  gap: 26px;
  min-width: 0;
}

/* ---------- 章节索引 ---------- */

.page-faq .faq-index {
  align-self: start;
}

@media (min-width: 1024px) {
  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
}

.page-faq .faq-index .chapter-index-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--ink-muted);
}

.page-faq .faq-index .chapter-index-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

@media (min-width: 1024px) {
  .page-faq .faq-index .chapter-index-list {
    flex-direction: column;
    gap: 2px;
    padding: 0;
    overflow: visible;
  }
}

.page-faq .faq-index .chapter-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  padding: 8px 15px;
  border: 1px solid var(--hair);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--ink-muted);
  font-size: 14px;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 180ms var(--ease), color 180ms var(--ease), background-color 180ms var(--ease);
}

.page-faq .faq-index .chapter-link:hover {
  color: var(--ink);
  border-color: var(--ice-ink);
}

.page-faq .faq-index .chapter-link[aria-current="true"] {
  color: var(--ink);
  border-color: var(--pulse-ink);
  background: var(--paper-2);
}

@media (min-width: 1024px) {
  .page-faq .faq-index .chapter-link {
    border-color: transparent;
    border-left: 2px solid transparent;
    border-radius: 8px;
    padding: 9px 12px;
    white-space: normal;
  }

  .page-faq .faq-index .chapter-link[aria-current="true"] {
    border-left-color: var(--pulse);
    background: var(--paper-2);
  }
}

.page-faq .faq-index .chapter-idx {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gold-ink);
}

/* ---------- 区块 ---------- */

.page-faq .faq-section {
  position: relative;
  padding: 30px var(--faq-card-pad) 36px;
  border-radius: var(--faq-radius);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

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

.page-faq .faq-section--paper-2 {
  background: var(--paper-2);
}

.page-faq .faq-section--night {
  background: var(--night);
  color: var(--night-text);
  box-shadow: var(--shadow-night);
}

.page-faq .chapter-num {
  display: block;
  margin: 0 0 2px;
  color: var(--hair);
  line-height: .82;
}

.page-faq .faq-section--night .chapter-num {
  color: rgba(127, 211, 247, .26);
}

.page-faq .faq-section--paper .eyebrow,
.page-faq .faq-section--paper-2 .eyebrow {
  color: var(--ice-ink);
}

.page-faq .faq-section--night .eyebrow {
  color: var(--ice);
}

.page-faq .faq-section--night .h-section,
.page-faq .faq-section--night .h-sub {
  color: var(--paper);
}

.page-faq .faq-section--night .lede,
.page-faq .faq-section--night p {
  color: var(--night-text);
}

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

.page-faq .faq-section .lede {
  margin-top: 14px;
  max-width: 54ch;
}

/* ---------- 图 ---------- */

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

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

.page-faq .faq-figure--side {
  margin-top: 24px;
}

@media (min-width: 900px) {
  .page-faq .faq-figure--side {
    margin-top: 24px;
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }
}

/* ---------- 三步轨道 ---------- */

.page-faq .faq-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 720px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
}

.page-faq .faq-steps .step {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 0;
  padding: 24px 20px 20px;
  border: 1px solid var(--night-line);
  border-radius: var(--radius-md);
  background: var(--black);
}

.page-faq .faq-steps .step-num {
  display: block;
  width: auto;
  height: auto;
  margin: 0;
  border-radius: 0;
  background: none;
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--gold);
}

.page-faq .faq-steps .step-body p {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--night-text);
}

.page-faq .faq-step-detail {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--night-line);
}

.page-faq .faq-step-detail > summary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 0;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--ice);
}

.page-faq .faq-step-detail > summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-step-detail > summary::before {
  content: "+";
  font-size: 14px;
  line-height: 1;
  color: var(--pulse);
}

.page-faq .faq-step-detail[open] > summary::before {
  content: "\2212";
}

.page-faq .faq-step-detail .collapse-body {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12.8px;
  line-height: 1.95;
  color: var(--night-muted);
}

.page-faq .faq-step-detail .collapse-body ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-step-detail .collapse-body li {
  position: relative;
  padding-left: 15px;
}

.page-faq .faq-step-detail .collapse-body li + li {
  margin-top: 6px;
}

.page-faq .faq-step-detail .collapse-body li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .82em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--pulse);
}

/* ---------- 问答折叠 ---------- */

.page-faq .faq-questions {
  display: flex;
  flex-direction: column;
  margin-top: 22px;
}

.page-faq .faq-q {
  border-top: 1px solid var(--faq-hair-soft);
}

.page-faq .faq-q:last-child {
  border-bottom: 1px solid var(--faq-hair-soft);
}

.page-faq .faq-q > summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 0;
  list-style: none;
  cursor: pointer;
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--ink);
  transition: color 180ms var(--ease);
}

.page-faq .faq-q > summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-q > summary:hover {
  color: var(--ice-ink);
}

.page-faq .faq-q-mark {
  flex: 0 0 auto;
  padding-top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .04em;
}

.page-faq .faq-q-text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-q > summary::after {
  content: "+";
  flex: 0 0 auto;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 400;
  color: var(--ink-muted);
}

.page-faq .faq-q[open] > summary::after {
  content: "\2212";
}

.page-faq .faq-q-body {
  padding: 0 0 18px;
  max-width: 68ch;
}

.page-faq .faq-q-body p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ink-muted);
}

.page-faq .faq-questions--pulse .faq-q-mark {
  color: var(--pulse-ink);
}

.page-faq .faq-questions--gold .faq-q-mark {
  color: var(--gold-ink);
}

.page-faq .faq-questions--ice .faq-q-mark {
  color: var(--ice-ink);
}

/* 夜间区问答 */

.page-faq .faq-section--night .faq-q {
  border-top-color: var(--night-line);
}

.page-faq .faq-section--night .faq-q:last-child {
  border-bottom-color: var(--night-line);
}

.page-faq .faq-section--night .faq-q > summary {
  color: var(--paper);
}

.page-faq .faq-section--night .faq-q > summary:hover {
  color: var(--ice);
}

.page-faq .faq-section--night .faq-q > summary::after {
  color: var(--ice);
}

.page-faq .faq-section--night .faq-q-body p {
  color: var(--night-text);
}

.page-faq .faq-questions--ice .faq-q-mark {
  color: var(--ice);
}

/* ---------- 跨设备双栏 ---------- */

.page-faq .faq-cross-grid {
  display: grid;
  gap: 24px;
  margin-top: 4px;
}

@media (min-width: 900px) {
  .page-faq .faq-cross-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, .62fr);
    gap: 36px;
    align-items: start;
  }
}

.page-faq .faq-cross-grid .faq-questions {
  margin-top: 18px;
}

/* ---------- 术语表 ---------- */

.page-faq .faq-glossary {
  margin: 22px 0 0;
  padding: 0;
}

.page-faq .faq-glossary-row {
  display: grid;
  gap: 6px;
  padding: 15px 0;
  border-top: 1px solid var(--hair);
}

.page-faq .faq-glossary-row:last-child {
  border-bottom: 1px solid var(--hair);
}

@media (min-width: 760px) {
  .page-faq .faq-glossary-row {
    grid-template-columns: 230px minmax(0, 1fr);
    gap: 28px;
    align-items: baseline;
  }
}

.page-faq .faq-glossary dt {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: -.01em;
  color: var(--ink);
  transition: color 180ms var(--ease);
}

.page-faq .faq-glossary dt span {
  font-size: 12px;
  color: var(--ice-ink);
}

.page-faq .faq-glossary-row:hover dt {
  color: var(--ice-ink);
}

.page-faq .faq-glossary dd {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-muted);
}

/* ---------- 出口 ---------- */

.page-faq .faq-exit {
  display: grid;
  gap: 22px;
  margin-top: 26px;
}

@media (min-width: 860px) {
  .page-faq .faq-exit {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }
}

.page-faq .faq-exit-prep .h-sub {
  margin-bottom: 12px;
}

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

.page-faq .faq-prep li {
  position: relative;
  padding: 10px 0 10px 22px;
  border-top: 1px solid var(--night-line);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--night-text);
}

.page-faq .faq-prep li:last-child {
  border-bottom: 1px solid var(--night-line);
}

.page-faq .faq-prep li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 1.15em;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--gold);
}

.page-faq .faq-exit-card {
  padding: 24px 22px;
  border: 1px solid var(--night-line);
  border-radius: var(--radius-md);
  background: var(--black);
}

.page-faq .faq-exit-mail {
  margin: 0;
  font-size: 15px;
  letter-spacing: -.01em;
  color: var(--gold);
  word-break: break-all;
}

.page-faq .faq-exit-note {
  margin: 10px 0 18px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--night-muted);
}

.page-faq .faq-warn {
  display: block;
  margin: 24px 0 0;
  padding: 16px 20px;
  border: 1px solid rgba(196, 85, 59, .5);
  border-radius: var(--radius-md);
  background: rgba(196, 85, 59, .12);
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(245, 240, 230, .92);
}

.page-faq .faq-warn strong {
  color: #F0A38C;
  font-weight: 600;
}

.page-faq .faq-exit-links {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

@media (min-width: 720px) {
  .page-faq .faq-exit-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-faq .faq-exit-link {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  border: 1px solid var(--night-line);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: border-color 180ms var(--ease), background-color 180ms var(--ease);
}

.page-faq .faq-exit-link .mono {
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--ice);
}

.page-faq .faq-exit-link span:last-child {
  font-size: 15px;
  color: var(--night-text);
}

.page-faq .faq-exit-link:hover {
  border-color: var(--ice);
  background: rgba(127, 211, 247, .07);
}

/* ---------- 窄屏保护 ---------- */

@media (max-width: 460px) {
  .page-faq .faq-section {
    padding: 24px 18px 30px;
    border-radius: var(--radius-md);
  }

  .page-faq .faq-q > summary {
    font-size: 15.5px;
    gap: 10px;
  }

  .page-faq .faq-steps .step {
    padding: 20px 16px 18px;
  }

  .page-faq .faq-status {
    font-size: 11.5px;
    padding: 8px 13px;
  }
}