.page-faq {
  display: block;
  padding-bottom: clamp(3rem, 8vw, 6rem);
}

.page-faq section[id],
.page-faq .qa-group[id] {
  scroll-margin-top: 6.5rem;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-open {
  position: relative;
  padding-top: clamp(1.75rem, 5vw, 3rem);
  padding-bottom: clamp(2rem, 5.5vw, 3.5rem);
  background:
    radial-gradient(1100px 520px at 10% -18%, rgba(107, 75, 214, 0.24), transparent 62%),
    radial-gradient(880px 440px at 92% -6%, rgba(63, 201, 232, 0.14), transparent 60%);
}

.page-faq .faq-open__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: start;
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
}

.page-faq .faq-open__lead .display-title {
  margin: 0.65rem 0 1.15rem;
  font-size: clamp(2.05rem, 6vw, 3.75rem);
  font-weight: 300;
  line-height: 1.2;
  letter-spacing: 0.06em;
}

.page-faq .lede {
  max-width: 36em;
  margin: 0;
  font-size: 1.02rem;
  line-height: 1.85;
  color: rgba(243, 238, 228, 0.78);
}

.page-faq .faq-open__meta {
  margin: 1.4rem 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  line-height: 1.9;
  color: var(--mist);
}

.page-faq .faq-open__signals {
  display: grid;
  gap: 0.85rem;
}

.page-faq .signal {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.3rem 0.95rem;
  padding: 1.15rem 1.3rem;
  background: linear-gradient(130deg, rgba(35, 38, 47, 0.95), rgba(35, 38, 47, 0.5));
  border: 1px solid var(--line);
  clip-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut));
  color: var(--cream);
  text-decoration: none;
  transition: transform 220ms var(--ease), border-color 220ms var(--ease), background 220ms var(--ease);
}

.page-faq .signal:hover,
.page-faq .signal:focus-visible {
  transform: translateX(5px);
  border-color: rgba(63, 201, 232, 0.55);
  background: linear-gradient(130deg, rgba(63, 201, 232, 0.16), rgba(35, 38, 47, 0.55));
}

.page-faq .signal__idx {
  grid-row: 1 / span 2;
  align-self: start;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  padding-top: 0.2rem;
}

.page-faq .signal__name {
  font-size: 1.05rem;
  letter-spacing: 0.05em;
}

.page-faq .signal__note {
  grid-column: 2;
  font-size: 0.86rem;
  line-height: 1.75;
  color: rgba(243, 238, 228, 0.6);
}

/* ---------- 通用节点头 ---------- */

.page-faq .section__head {
  max-width: 42rem;
}

.page-faq .section__head .section__title {
  margin: 0.55rem 0 0.95rem;
  font-size: clamp(1.5rem, 3.6vw, 2.25rem);
  font-weight: 400;
  line-height: 1.35;
  letter-spacing: 0.05em;
}

.page-faq .prose {
  max-width: 36em;
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.85;
  color: rgba(243, 238, 228, 0.72);
}

.page-faq .media {
  margin: 0;
}

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

.page-faq .media__caption {
  margin-top: 0.75rem;
  font-size: 0.8rem;
  line-height: 1.75;
  color: rgba(243, 238, 228, 0.5);
}

/* ---------- 分类索引 ---------- */

.page-faq .faq-index {
  margin-top: clamp(3rem, 8vw, 6rem);
}

.page-faq .faq-index__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
}

.page-faq .cat-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

.page-faq .cat-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.5rem 1.1rem;
  padding: 1.2rem 1.35rem;
  background: linear-gradient(120deg, rgba(35, 38, 47, 0.95), rgba(35, 38, 47, 0.45));
  border-left: 2px solid var(--graphite);
  color: var(--cream);
  text-decoration: none;
  transition: transform 220ms var(--ease), border-color 220ms var(--ease), background 220ms var(--ease);
}

.page-faq .cat-card:hover,
.page-faq .cat-card:focus-visible {
  transform: translateX(6px);
  border-left-color: var(--cyan);
  background: linear-gradient(120deg, rgba(63, 201, 232, 0.14), rgba(35, 38, 47, 0.55));
}

.page-faq .cat-card__idx {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-faq .cat-card__body {
  display: grid;
  gap: 0.3rem;
}

.page-faq .cat-card__name {
  font-size: 1.05rem;
  letter-spacing: 0.06em;
}

.page-faq .cat-card__desc {
  font-size: 0.85rem;
  line-height: 1.7;
  color: rgba(243, 238, 228, 0.58);
}

.page-faq .cat-card__count {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gold);
  white-space: nowrap;
}

.page-faq .faq-index__media img {
  clip-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut));
}

/* ---------- 旧版对照 ---------- */

.page-faq .faq-lookup {
  margin-top: clamp(3rem, 8vw, 6rem);
}

.page-faq .faq-lookup__figure {
  margin: clamp(1.5rem, 4vw, 2.5rem) 0 0;
}

.page-faq .lookup {
  margin-top: clamp(1.5rem, 4vw, 2.25rem);
  border-top: 1px solid var(--line-strong);
}

.page-faq .lookup__head {
  display: none;
  padding: 0.9rem 0.5rem;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
  border-bottom: 1px solid var(--line);
}

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

.page-faq .lookup__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.4rem;
  padding: 1.15rem 0.5rem;
  border-bottom: 1px solid var(--line);
  transition: background 200ms var(--ease), box-shadow 200ms var(--ease);
}

.page-faq .lookup__row:hover,
.page-faq .lookup__row:focus-within {
  background: rgba(107, 75, 214, 0.13);
  box-shadow: inset 2px 0 0 var(--cyan);
}

.page-faq .lookup__old {
  font-size: 0.94rem;
  line-height: 1.7;
  letter-spacing: 0.03em;
  color: var(--clay);
}

.page-faq .lookup__new {
  font-size: 0.94rem;
  line-height: 1.7;
  letter-spacing: 0.03em;
  color: var(--mist);
}

.page-faq .lookup__old::before {
  content: "旧版 / ";
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  opacity: 0.7;
}

.page-faq .lookup__new::before {
  content: "焕新 / ";
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  opacity: 0.7;
}

.page-faq .lookup__note {
  grid-column: 1 / -1;
  margin-top: 0.25rem;
  font-size: 0.84rem;
  line-height: 1.8;
  color: rgba(243, 238, 228, 0.6);
}

/* ---------- 问答 ---------- */

.page-faq .faq-qa {
  margin-top: clamp(3rem, 8vw, 6rem);
}

.page-faq .qa-group--account { --group-accent: var(--cyan); }
.page-faq .qa-group--member { --group-accent: var(--gold); }
.page-faq .qa-group--version { --group-accent: var(--nebula); }
.page-faq .qa-group--library { --group-accent: var(--moss); }
.page-faq .qa-group--support { --group-accent: var(--mist); }

.page-faq .qa-group {
  margin-top: clamp(2rem, 5vw, 3rem);
}

.page-faq .qa-group__title {
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
  margin: 0 0 0.9rem;
  font-size: 1.05rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  color: var(--cream);
}

.page-faq .qa-group__title .mono {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--group-accent, var(--cyan));
}

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

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

.page-faq .accordion__trigger {
  width: 100%;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.4rem 1rem;
  padding: 1.05rem 0.35rem;
  background: none;
  border: 0;
  color: var(--cream);
  font-family: inherit;
  font-size: 0.99rem;
  line-height: 1.65;
  letter-spacing: 0.02em;
  text-align: left;
  cursor: pointer;
  transition: color 180ms var(--ease);
}

.page-faq .accordion__trigger:hover {
  color: var(--group-accent, var(--cyan));
}

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

.page-faq .accordion__idx {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--group-accent, var(--cyan));
  opacity: 0.72;
  align-self: start;
  padding-top: 0.35rem;
}

.page-faq .accordion__icon {
  position: relative;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
}

.page-faq .accordion__icon::before,
.page-faq .accordion__icon::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
  background: var(--group-accent, var(--cyan));
  transition: transform 220ms var(--ease), opacity 220ms var(--ease);
}

.page-faq .accordion__icon::after {
  transform: rotate(90deg);
}

.page-faq .accordion__trigger[aria-expanded="true"] .accordion__icon::after {
  transform: rotate(0deg);
  opacity: 0;
}

.page-faq .accordion__panel {
  padding: 0 2.2rem 1.35rem 2.3rem;
}

.page-faq .accordion__panel[hidden] {
  display: none;
}

.page-faq .accordion__panel p {
  margin: 0 0 0.7rem;
  max-width: 36em;
  font-size: 0.94rem;
  line-height: 1.85;
  color: rgba(243, 238, 228, 0.74);
}

.page-faq .accordion__panel p:last-child {
  margin-bottom: 0;
}

/* ---------- 找人工 ---------- */

.page-faq .faq-escalate {
  margin-top: clamp(3rem, 8vw, 6rem);
}

.page-faq .escalate__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
}

.page-faq .panel {
  padding: 1.5rem 1.5rem 1.65rem;
  background: linear-gradient(150deg, rgba(35, 38, 47, 0.92), rgba(35, 38, 47, 0.42));
  border: 1px solid var(--line);
  clip-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut));
}

.page-faq .panel__label {
  margin: 0 0 0.7rem;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-faq .panel__title {
  margin: 0 0 0.7rem;
  font-size: 1.08rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  color: var(--cream);
}

.page-faq .panel__text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.85;
  color: rgba(243, 238, 228, 0.7);
  word-break: break-word;
}

.page-faq .escalate__note {
  margin: 1.5rem 0 0;
  max-width: 46em;
  font-size: 0.86rem;
  line-height: 1.9;
  color: var(--mist);
}

.page-faq .escalate__note a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 0.25em;
  text-decoration-thickness: 1px;
}

.page-faq .escalate__note a:hover,
.page-faq .escalate__note a:focus-visible {
  color: var(--gold);
}

/* ---------- 响应式 ---------- */

@media (min-width: 760px) {
  .page-faq .lookup__head {
    display: grid;
  }

  .page-faq .lookup__head,
  .page-faq .lookup__row {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    column-gap: 1.6rem;
  }

  .page-faq .lookup__row {
    padding: 1.2rem 0.5rem;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-open__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    column-gap: clamp(2rem, 5vw, 4.5rem);
  }

  .page-faq .faq-index__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    column-gap: clamp(2rem, 5vw, 4rem);
  }

  .page-faq .faq-index__media {
    position: sticky;
    top: 6.5rem;
  }

  .page-faq .accordion__panel {
    padding-left: 2.9rem;
  }
}

@media (min-width: 1000px) {
  .page-faq .escalate__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.25rem;
  }
}

@media (max-width: 759px) {
  .page-faq .lookup__row {
    padding: 1.05rem 0.25rem;
  }

  .page-faq .cat-card {
    padding: 1.05rem 1.1rem;
  }

  .page-faq .accordion__panel {
    padding: 0 0.35rem 1.2rem 0.35rem;
  }

  .page-faq .faq-open__grid {
    gap: 1.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .signal,
  .page-faq .cat-card,
  .page-faq .accordion__trigger,
  .page-faq .accordion__icon::before,
  .page-faq .accordion__icon::after,
  .page-faq .lookup__row {
    transition: none;
  }

  .page-faq .signal:hover,
  .page-faq .signal:focus-visible,
  .page-faq .cat-card:hover,
  .page-faq .cat-card:focus-visible {
    transform: none;
  }
}