.page-faq {
  --faq-rule: rgba(154, 166, 191, .22);
  --faq-rule-soft: rgba(154, 166, 191, .14);
  --faq-gap: clamp(24px, 4vw, 48px);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-lead {
  position: relative;
  padding: clamp(22px, 4vw, 44px) 0 clamp(40px, 6vw, 76px);
  overflow: hidden;
}

.page-faq .faq-lead::after {
  content: "";
  position: absolute;
  right: -140px;
  bottom: -180px;
  width: 360px;
  height: 360px;
  border: 2px solid rgba(61, 123, 255, .28);
  transform: rotate(-16deg);
  pointer-events: none;
}

.page-faq .breadcrumbs {
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-faq .faq-lead__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  position: relative;
  z-index: 1;
}

.page-faq .faq-lead h1 {
  font-family: var(--font-serif);
  font-size: clamp(30px, 4.6vw, 52px);
  font-weight: 700;
  line-height: 1.14;
  letter-spacing: -.01em;
  color: var(--paper);
  margin: 12px 0 0;
  max-width: 20ch;
}

.page-faq .faq-lead__lede {
  margin: 18px 0 0;
  max-width: 56ch;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  border: 2px solid var(--faq-rule);
  background: var(--ink-700);
}

.page-faq .faq-stats li {
  padding: 12px 14px;
  border-right: 2px solid var(--faq-rule-soft);
}

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

.page-faq .faq-stats__k {
  display: block;
  font-family: var(--font-sans);
  font-size: var(--fs-12);
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--graphite);
}

.page-faq .faq-stats__v {
  display: block;
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: clamp(16px, 3.6vw, 20px);
  font-variant-numeric: tabular-nums;
  color: var(--orange);
}

.page-faq .faq-lead__media {
  margin: 0;
  aspect-ratio: 16 / 9;
  border: 2px solid var(--faq-rule);
  background: var(--ink-900);
  box-shadow: var(--shadow-hard);
}

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

/* ---------- 问答区 ---------- */

.page-faq .faq-zone {
  padding: clamp(36px, 5vw, 68px) 0 clamp(40px, 6vw, 76px);
}

.page-faq .faq-zone__bar {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 28px);
  padding-bottom: 22px;
  border-bottom: 2px solid var(--faq-rule);
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-faq .faq-zone__bar .section-head {
  min-width: 0;
}

.page-faq .faq-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-content: flex-start;
}

.page-faq .faq-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  font-family: var(--font-sans);
  font-size: var(--fs-14);
  font-weight: 700;
  line-height: 1.3;
  color: var(--mist);
  background: transparent;
  border: 2px solid rgba(154, 166, 191, .34);
  border-radius: 999px;
  cursor: pointer;
  transition: border-color .18s var(--ease), color .18s var(--ease),
    background-color .18s var(--ease), transform .18s var(--ease);
}

.page-faq .faq-chip:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  transform: translateY(-2px);
}

.page-faq .faq-chip:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .faq-chip[aria-pressed="true"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink-900);
}

.page-faq .faq-chip__num {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  font-variant-numeric: tabular-nums;
  opacity: .78;
}

.page-faq .faq-list {
  display: block;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(34px, 5vw, 56px);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--faq-rule);
  margin-bottom: 4px;
}

.page-faq .faq-group__label {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-group__count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  font-variant-numeric: tabular-nums;
  color: var(--graphite);
}

/* ---------- 折叠条目 ---------- */

.page-faq .faq-item {
  border-bottom: 2px solid var(--faq-rule-soft);
}

.page-faq .faq-item__q {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 18px 44px 18px 0;
  cursor: pointer;
  list-style: none;
  transition: background-color .18s var(--ease);
}

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

.page-faq .faq-item__q::marker {
  content: "";
}

.page-faq .faq-item__q:hover {
  background: rgba(34, 227, 195, .06);
}

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

.page-faq .faq-item__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  font-variant-numeric: tabular-nums;
  color: var(--orange);
  padding-top: 2px;
}

.page-faq .faq-item__text {
  font-size: var(--fs-16);
  font-weight: 600;
  line-height: 1.62;
  color: var(--paper);
  max-width: 58ch;
  transition: color .18s var(--ease);
}

.page-faq .faq-item__q:hover .faq-item__text,
.page-faq .faq-item[open] .faq-item__text {
  color: var(--cyan);
}

.page-faq .faq-item__sign {
  position: absolute;
  right: 4px;
  top: 24px;
  width: 16px;
  height: 16px;
}

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

.page-faq .faq-item__sign::before {
  left: 0;
  top: 7px;
  width: 16px;
  height: 2px;
}

.page-faq .faq-item__sign::after {
  left: 7px;
  top: 0;
  width: 2px;
  height: 16px;
}

.page-faq .faq-item[open] .faq-item__sign::after {
  transform: scaleY(0);
}

.page-faq .faq-item[open] .faq-item__sign::before {
  background: var(--orange);
}

.page-faq .faq-item__a {
  padding-bottom: 24px;
}

.page-faq .faq-item__a-inner {
  max-width: 82ch;
  padding: 6px 0 6px 20px;
  border-left: 3px solid var(--accent-3);
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--mist);
  animation: faq-reveal .22s var(--ease) both;
}

.page-faq .faq-item__a-inner p {
  margin: 0;
}

@keyframes faq-reveal {
  from {
    opacity: 0;
    transform: translateY(-5px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__a-inner {
    animation: none;
  }
  .page-faq .faq-chip:hover {
    transform: none;
  }
}

/* ---------- 口径对照（浅色反色区） ---------- */

.page-faq .faq-spec {
  padding: clamp(40px, 6vw, 78px) 0;
  color: var(--fg-dark);
}

.page-faq .faq-spec__head {
  max-width: 62ch;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-faq .faq-spec__head .section-num {
  color: var(--orange);
}

.page-faq .faq-spec__head .section-label {
  color: var(--ink-700);
}

.page-faq .faq-spec__head .section-title {
  color: var(--ink-900);
}

.page-faq .faq-spec__head .section-desc {
  color: var(--ink-700);
}

.page-faq .faq-spec__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 42px);
  align-items: start;
}

.page-faq .faq-spec__scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 2px solid var(--ink-900);
  box-shadow: 0 6px 0 rgba(14, 27, 61, .22);
  background: var(--paper);
}

.page-faq .faq-spec__table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: var(--fs-14);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-spec__caption {
  caption-side: top;
  padding: 12px 14px;
  text-align: left;
  font-family: var(--font-sans);
  font-size: var(--fs-12);
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--paper);
  background: var(--ink-900);
}

.page-faq .faq-spec__table th,
.page-faq .faq-spec__table td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  line-height: 1.6;
  color: var(--ink-800);
  border-bottom: 1px solid rgba(14, 27, 61, .16);
}

.page-faq .faq-spec__table thead th {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--paper);
  background: var(--ink-700);
  border-bottom: 0;
}

.page-faq .faq-spec__table tbody th {
  font-weight: 700;
  color: var(--ink-900);
  border-right: 1px solid rgba(14, 27, 61, .12);
}

.page-faq .faq-spec__table tbody tr:nth-child(even) {
  background: rgba(230, 234, 242, .62);
}

.page-faq .faq-spec__table tbody tr:last-child th,
.page-faq .faq-spec__table tbody tr:last-child td {
  border-bottom: 0;
}

.page-faq .faq-spec__figure {
  margin: 0;
  border: 2px solid var(--ink-900);
  background: var(--paper);
}

.page-faq .faq-spec__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-bottom: 2px solid var(--ink-900);
}

.page-faq .faq-spec__figure .media-caption {
  display: block;
  padding: 12px 14px;
  font-size: var(--fs-12);
  line-height: 1.6;
  color: var(--ink-700);
}

/* ---------- 收束 ---------- */

.page-faq .faq-next {
  padding: clamp(42px, 6vw, 82px) 0 clamp(48px, 7vw, 92px);
}

.page-faq .faq-next__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
  align-items: end;
}

.page-faq .faq-next__copy h2 {
  margin: 10px 0 0;
  font-family: var(--font-serif);
  font-size: clamp(26px, 3.6vw, 38px);
  line-height: 1.2;
  color: var(--paper);
}

.page-faq .faq-next__copy p {
  margin: 16px 0 0;
  max-width: 58ch;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-next__links {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-faq .faq-next__links a {
  display: inline-block;
  font-size: var(--fs-14);
  color: var(--cyan);
  border-bottom: 2px solid transparent;
  padding-bottom: 2px;
  transition: border-color .18s var(--ease), color .18s var(--ease);
}

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

.page-faq .faq-next__btn {
  justify-self: start;
  white-space: nowrap;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-zone__bar {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: end;
    gap: clamp(24px, 4vw, 48px);
  }

  .page-faq .faq-chips {
    justify-content: flex-end;
  }

  .page-faq .faq-next__inner {
    grid-template-columns: minmax(0, 1fr) auto;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-lead__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: end;
    gap: clamp(32px, 5vw, 64px);
  }

  .page-faq .faq-spec__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, .65fr);
  }

  .page-faq .faq-item__q {
    padding-right: 56px;
  }

  .page-faq .faq-item__text {
    font-size: var(--fs-20);
  }

  .page-faq .faq-item__sign {
    top: 26px;
    right: 8px;
  }
}

@media (max-width: 420px) {
  .page-faq .faq-stats li {
    padding: 10px 10px;
  }

  .page-faq .faq-stats__k {
    letter-spacing: .08em;
  }

  .page-faq .faq-item__q {
    gap: 10px;
    padding-right: 36px;
  }

  .page-faq .faq-item__text {
    font-size: 15px;
  }

  .page-faq .faq-item__a-inner {
    padding-left: 14px;
  }
}