.page-faq {
  --faq-rail: 268px;
  --faq-open-bg: rgba(43, 231, 200, .055);
  --faq-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;
  background: var(--c-fir);
  color: var(--c-chalk);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(26px, 5vw, 56px) 0 clamp(26px, 4vw, 46px);
  border-bottom: 1px solid var(--line);
  background-color: var(--c-fir);
  background-image:
    repeating-linear-gradient(90deg, rgba(124, 154, 147, .08) 0 1px, transparent 1px 72px),
    radial-gradient(120% 90% at 88% -12%, rgba(43, 231, 200, .16), transparent 58%),
    radial-gradient(95% 80% at -12% 112%, rgba(58, 42, 107, .58), transparent 62%);
}

.page-faq .faq-hero__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--pad);
}

.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--c-mute);
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-faq .breadcrumb a {
  color: var(--c-mute);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

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

.page-faq .eyebrow {
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--c-cyan);
  margin: 0 0 14px;
}

.page-faq .faq-hero h1 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(30px, 5.4vw, 60px);
  line-height: 1.06;
  letter-spacing: -.02em;
  max-width: 20ch;
  color: var(--c-chalk);
}

.page-faq .lede {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 64ch;
  font-size: clamp(15.5px, 1.4vw, 17px);
  line-height: 1.8;
  color: var(--c-chalk);
  opacity: .88;
}

.page-faq .lede a {
  color: var(--c-cyan);
}

.page-faq .faq-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(24px, 4vw, 40px);
  background: var(--line-2);
  border: 1px solid var(--line-2);
}

.page-faq .faq-stat {
  background: var(--c-fir-2);
  padding: 14px 16px;
  min-width: 0;
}

.page-faq .faq-stat__v {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(22px, 4vw, 36px);
  line-height: 1;
  letter-spacing: .02em;
  color: var(--c-cyan-white);
}

.page-faq .faq-stat__k {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--c-mute);
}

/* ---------- 骨架 ---------- */
.page-faq .faq-shell {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(28px, 4vw, 52px) var(--pad) clamp(52px, 7vw, 96px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3vw, 40px);
}

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

.page-faq .faq-rail__title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--c-mute);
}

.page-faq .faq-rail__title--sub {
  margin-top: 26px;
}

.page-faq .faq-index {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 13px;
  border: 1px solid var(--line-2);
  border-radius: var(--pill);
  background: rgba(14, 42, 36, .65);
  color: var(--c-chalk);
  font-size: 13px;
  text-decoration: none;
  transition: border-color .22s var(--ease), color .22s var(--ease);
}

.page-faq .faq-index__link .num {
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--c-amber);
}

.page-faq .faq-index__link:hover {
  border-color: var(--c-cyan);
  color: var(--c-cyan-white);
}

.page-faq .faq-index__link.is-active {
  border-color: var(--c-cyan);
  color: var(--c-cyan-white);
}

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

.page-faq .faq-filter__btn {
  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
  font: inherit;
  font-size: 13px;
  line-height: 1.2;
  padding: 7px 14px;
  border: 1px solid var(--line-2);
  border-radius: var(--pill);
  background: transparent;
  color: var(--c-chalk);
  transition: border-color .22s var(--ease), background-color .22s var(--ease), color .22s var(--ease);
}

.page-faq .faq-filter__btn:hover {
  border-color: var(--c-cyan);
  color: var(--c-cyan-white);
}

.page-faq .faq-filter__btn.is-active,
.page-faq .faq-filter__btn[aria-pressed="true"] {
  background: rgba(255, 182, 77, .18);
  border-color: var(--c-amber);
  color: var(--c-amber);
}

/* ---------- 分组 ---------- */
.page-faq .faq-body {
  min-width: 0;
}

.page-faq .faq-group {
  padding-bottom: clamp(30px, 4vw, 52px);
  margin-bottom: clamp(30px, 4vw, 52px);
  border-bottom: 1px solid var(--line-2);
}

.page-faq .faq-group:last-child {
  margin-bottom: 0;
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 8px 16px;
  align-items: start;
  margin-bottom: clamp(14px, 2vw, 22px);
}

.page-faq .faq-group__num {
  font-family: var(--font-num);
  font-size: clamp(38px, 6.4vw, 66px);
  line-height: .82;
  letter-spacing: -.01em;
  color: var(--c-amber);
  opacity: .92;
}

.page-faq .faq-group__meta {
  min-width: 0;
  padding-top: 4px;
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(20px, 2.4vw, 28px);
  line-height: 1.25;
  letter-spacing: -.01em;
  color: var(--c-chalk);
}

.page-faq .faq-group__note {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-mute);
  max-width: 54ch;
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-list {
  border-top: 1px solid var(--line-2);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--line-2);
  border-left: 2px solid transparent;
  transition: border-color .25s var(--ease), background-color .25s var(--ease);
}

.page-faq .faq-item[open] {
  border-left-color: var(--c-cyan);
  background: var(--faq-open-bg);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 15px 14px 15px 16px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item__q:hover .faq-item__text {
  color: var(--c-cyan-white);
}

.page-faq .faq-item__num {
  flex: 0 0 auto;
  min-width: 24px;
  font-family: var(--font-num);
  font-size: 15px;
  line-height: 1.5;
  letter-spacing: .06em;
  color: var(--c-amber);
}

.page-faq .faq-item__text {
  flex: 1 1 auto;
  min-width: 0;
  font-size: clamp(15px, 1.3vw, 16.5px);
  font-weight: 500;
  line-height: 1.55;
  color: var(--c-chalk);
  transition: color .22s var(--ease);
}

.page-faq .faq-item__mark {
  position: relative;
  flex: 0 0 14px;
  width: 14px;
  height: 14px;
  margin-top: 7px;
  margin-left: auto;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--c-cyan);
}

.page-faq .faq-item__mark::before {
  left: 0;
  right: 0;
  top: 6px;
  height: 1px;
}

.page-faq .faq-item__mark::after {
  top: 0;
  bottom: 0;
  left: 6px;
  width: 1px;
  transform: scaleY(1);
  transition: transform .25s var(--ease);
}

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

.page-faq .faq-item__a {
  padding: 0 18px 18px 54px;
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-chalk);
  opacity: .82;
  overflow-wrap: anywhere;
}

.page-faq .faq-item__a a {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
}

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

.page-faq .faq-code {
  font-family: var(--faq-mono);
  font-size: .9em;
  padding: 1px 6px;
  border: 1px solid var(--line);
  background: rgba(43, 231, 200, .1);
  color: var(--c-cyan-white);
  white-space: nowrap;
}

/* ---------- 图文 ---------- */
.page-faq .faq-figure {
  margin: 0;
  border: 1px solid var(--line-2);
  background: var(--c-fir-2);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(.88) contrast(1.05) brightness(.94);
}

.page-faq .faq-figure__cap {
  padding: 10px 14px;
  border-top: 1px solid var(--line-2);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--c-mute);
}

.page-faq .faq-list .faq-figure {
  margin: 18px 0;
}

/* ---------- 联系块 ---------- */
.page-faq .faq-contact {
  margin-top: clamp(22px, 3vw, 32px);
  padding: clamp(18px, 3vw, 28px);
  border: 1px solid var(--line);
  border-left: 2px solid var(--c-amber);
  background: linear-gradient(180deg, rgba(58, 42, 107, .38), rgba(14, 42, 36, .92));
}

.page-faq .faq-contact__lead {
  margin: 8px 0 18px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--c-chalk);
  opacity: .85;
  max-width: 56ch;
}

.page-faq .faq-contact__lead a,
.page-faq .faq-contact__note a {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-contact .contact-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  padding: 11px 0;
  border-top: 1px dashed var(--line-2);
}

.page-faq .faq-contact .contact-label {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--c-mute);
}

.page-faq .faq-contact .contact-value {
  flex: 1 1 auto;
  min-width: 0;
  font-family: var(--font-num);
  font-size: clamp(15px, 1.6vw, 18px);
  letter-spacing: .02em;
  color: var(--c-cyan-white);
  overflow-wrap: anywhere;
}

.page-faq .faq-copy {
  flex: 0 0 auto;
  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
  font: inherit;
  font-size: 12.5px;
  padding: 6px 12px;
  border: 1px solid var(--line-2);
  border-radius: var(--pill);
  background: transparent;
  color: var(--c-chalk);
  transition: border-color .2s var(--ease), color .2s var(--ease), background-color .2s var(--ease);
}

.page-faq .faq-copy:hover {
  border-color: var(--c-cyan);
  color: var(--c-cyan-white);
}

.page-faq .faq-contact__note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--c-mute);
  max-width: 62ch;
}

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

/* ---------- 平板与桌面 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-item__q {
    padding: 17px 18px 17px 18px;
  }

  .page-faq .faq-item__a {
    padding: 0 24px 20px 58px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: clamp(34px, 4vw, 72px);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 96px;
    align-self: start;
  }

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

  .page-faq .faq-index__link {
    display: flex;
    width: 100%;
    border: 0;
    border-left: 2px solid var(--line-2);
    border-radius: 0;
    background: transparent;
    padding: 9px 12px;
    font-size: 14px;
  }

  .page-faq .faq-index__link.is-active {
    border-left-color: var(--c-cyan);
    background: rgba(43, 231, 200, .06);
  }
}

@media (min-width: 1120px) {
  .page-faq .faq-group__split {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 288px;
    gap: clamp(20px, 2.4vw, 34px);
    align-items: start;
  }

  .page-faq .faq-group__split .faq-figure--tall {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-figure--wide img {
    max-height: 460px;
  }
}

@media (max-width: 520px) {
  .page-faq .faq-stats {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-item__a {
    padding-left: 40px;
    padding-right: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition: none !important;
    animation: none !important;
  }
}