.page-faq {
  --faq-line: rgba(34, 224, 214, 0.18);
  --faq-gap: clamp(28px, 4vw, 56px);
  background:
    radial-gradient(880px 520px at 84% -12%, rgba(138, 92, 246, 0.18), transparent 68%),
    radial-gradient(640px 420px at 4% 8%, rgba(34, 224, 214, 0.1), transparent 70%),
    var(--ink-900);
  color: var(--paper);
  padding-bottom: clamp(56px, 9vw, 128px);
}

/* ---------- 封面 ---------- */
.page-faq .faq-cover {
  position: relative;
  padding-top: clamp(32px, 6vw, 88px);
  padding-bottom: clamp(28px, 4vw, 56px);
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-cover__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  align-items: end;
}

.page-faq .faq-cover__text {
  max-width: 780px;
}

.page-faq .faq-cover .headline {
  margin: 16px 0 0;
}

.page-faq .faq-cover .lede {
  margin-top: 20px;
  max-width: 62ch;
  color: rgba(242, 235, 221, 0.78);
}

.page-faq .faq-cover__media {
  width: 100%;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--line-soft);
}

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

/* ---------- 检索条 ---------- */
.page-faq .faq-search {
  margin-top: clamp(28px, 4vw, 44px);
  padding: clamp(18px, 2.4vw, 26px);
  background: linear-gradient(160deg, rgba(13, 20, 38, 0.96), rgba(10, 15, 30, 0.9));
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan);
  border-radius: var(--r-md);
}

.page-faq .faq-search__label {
  display: block;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 6px;
}

.page-faq .faq-search__input {
  display: block;
  width: 100%;
  padding: 10px 2px;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line-soft);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  transition: border-color var(--dur) var(--ease);
}

.page-faq .faq-search__input::placeholder {
  color: var(--mute);
}

.page-faq .faq-search__input:focus {
  outline: none;
  border-bottom-color: var(--cyan);
}

.page-faq .faq-search__hint {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mute);
}

.page-faq .faq-search__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 13px;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  color: var(--paper);
  font-size: 13px;
  line-height: 1.2;
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-chip__no {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--violet);
}

.page-faq .faq-chip:hover,
.page-faq .faq-chip:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(34, 224, 214, 0.08);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  padding-top: clamp(34px, 5vw, 72px);
}

/* ---------- 分类索引 ---------- */
.page-faq .faq-index__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mute);
}

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

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 13px 10px 13px 0;
  border-top: 1px solid var(--faq-line);
  color: var(--paper);
  font-size: 15px;
  text-decoration: none;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--cyan);
  background: rgba(34, 224, 214, 0.07);
  padding-left: 8px;
}

.page-faq .faq-index__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq .faq-index__count {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--mute);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-section {
  scroll-margin-top: 100px;
}

.page-faq .faq-section + .faq-section {
  margin-top: clamp(44px, 6vw, 84px);
}

.page-faq .faq-section__head {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px 16px;
  align-items: end;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--line-strong);
}

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

.page-faq .faq-section__title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 3.6vw, 30px);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.25;
}

.page-faq .faq-section__count {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mute);
  white-space: nowrap;
}

.page-faq .faq-shot {
  margin: 20px 0 0;
  border: 1px solid var(--line-soft);
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--ink-700);
}

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

/* ---------- 问题条目 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-item summary {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 6px 14px;
  align-items: start;
  padding: 20px 0;
  cursor: pointer;
  list-style: none;
  transition: color var(--dur) var(--ease);
}

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

.page-faq .faq-item summary:hover .faq-item__q,
.page-faq .faq-item summary:focus-visible .faq-item__q {
  color: var(--cyan);
}

.page-faq .faq-item summary:focus-visible {
  outline: 1px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .faq-item__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--orange);
  padding-top: 4px;
}

.page-faq .faq-item__q {
  font-size: 16px;
  font-weight: 500;
  line-height: 1.55;
  color: var(--paper);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-item__mark {
  position: relative;
  width: 16px;
  height: 16px;
  margin-top: 5px;
  flex: none;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

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

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

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

.page-faq .faq-item__a {
  padding: 0 0 22px;
  border-left: 1px solid var(--faq-line);
  padding-left: 14px;
  margin-left: 4px;
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 70ch;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(242, 235, 221, 0.76);
}

.page-faq .faq-item__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 224, 214, 0.4);
}

.page-faq .faq-item__a a:hover,
.page-faq .faq-item__a a:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ---------- 联系支持（暖纸） ---------- */
.page-faq .faq-contact {
  margin-top: clamp(44px, 6vw, 84px);
  padding: clamp(26px, 4vw, 48px);
  background: var(--paper);
  color: var(--paper-ink);
  border-radius: var(--r-md);
  border-left: 4px solid var(--orange);
  scroll-margin-top: 100px;
}

.page-faq .faq-contact__eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--paper-muted);
}

.page-faq .faq-contact__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 3.6vw, 32px);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.3;
  color: var(--paper-ink);
}

.page-faq .faq-contact__text {
  margin: 14px 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper-muted);
}

.page-faq .faq-contact__mail {
  margin: 18px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(16px, 2.6vw, 22px);
  letter-spacing: 0.02em;
  color: var(--paper-ink);
  word-break: break-all;
}

.page-faq .faq-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-cover__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-faq .faq-cover__media {
    aspect-ratio: 4 / 5;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-body {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: clamp(40px, 5vw, 84px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 108px;
    align-self: start;
  }

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

  .page-faq .faq-item__a {
    padding-left: 44px;
    margin-left: 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after,
  .page-faq .faq-index__link,
  .page-faq .faq-chip,
  .page-faq .faq-item__q {
    transition: none;
  }
}