.page-faq {
  --faq-accent: var(--volt);
  background: var(--pitch-deep);
  color: var(--ink);
  padding-bottom: clamp(56px, 9vw, 110px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-top: clamp(96px, 14vw, 152px);
  padding-bottom: clamp(26px, 4vw, 42px);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: var(--gut);
  right: var(--gut);
  bottom: 0;
  height: 3px;
  background: linear-gradient(
    90deg,
    var(--volt) 0 32%,
    var(--electric) 32% 58%,
    var(--pulse) 58% 70%,
    var(--graphite) 70% 100%
  );
}

.page-faq .faq-hero__kicker {
  margin: 22px 0 14px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--volt);
}

.page-faq .faq-hero__title {
  margin: 0 0 20px;
  max-width: 17ch;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(34px, 8vw, 82px);
  line-height: 1.04;
  letter-spacing: -.015em;
  color: var(--ink);
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  font-size: 12.5px;
  letter-spacing: .05em;
  color: var(--muted);
}

.page-faq .faq-hero__meta li {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
}

.page-faq .faq-hero__meta .bw-mono {
  font-size: 22px;
  font-weight: 700;
  color: var(--volt);
  letter-spacing: -.01em;
}

.page-faq .faq-hero__meta li:nth-child(2) .bw-mono { color: var(--electric); }
.page-faq .faq-hero__meta li:nth-child(4) .bw-mono { color: var(--pulse); }

/* ---------- 分类胶囊 ---------- */
.page-faq .faq-cats {
  padding-top: clamp(18px, 3vw, 28px);
  padding-bottom: clamp(8px, 2vw, 16px);
}

.page-faq .faq-cats__hint {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
}

.page-faq .faq-cats__list {
  display: flex;
  gap: 10px;
  margin: 0;
  padding: 2px 2px 10px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.page-faq .faq-cats__list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-cats__item {
  flex: 0 0 auto;
}

.page-faq .faq-cat {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 10px 18px 10px 14px;
  border: 1px solid var(--line-strong);
  border-radius: var(--pill);
  background: rgba(233, 255, 245, .05);
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.3;
  text-decoration: none;
  white-space: nowrap;
  transition: background .18s ease, border-color .18s ease, color .18s ease, transform .18s ease;
}

.page-faq .faq-cat:hover,
.page-faq .faq-cat:focus-visible {
  background: rgba(233, 255, 245, .1);
  color: var(--ink);
  transform: translateY(-1px);
}

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

.page-faq .faq-cat__no {
  font-size: 11px;
}

.page-faq .faq-cat--volt .faq-cat__no { color: var(--volt); }
.page-faq .faq-cat--volt:hover { border-color: rgba(200, 245, 63, .5); }

.page-faq .faq-cat--electric .faq-cat__no { color: var(--electric); }
.page-faq .faq-cat--electric:hover { border-color: rgba(51, 214, 255, .5); }

.page-faq .faq-cat--pulse .faq-cat__no { color: var(--pulse); }
.page-faq .faq-cat--pulse:hover { border-color: rgba(255, 92, 43, .5); }

/* ---------- 问答区块骨架 ---------- */
.page-faq .faq-block {
  padding-top: clamp(42px, 6vw, 78px);
}

.page-faq .faq-block__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-faq #scope { --faq-accent: var(--volt); }
.page-faq #usage { --faq-accent: var(--electric); }
.page-faq #account { --faq-accent: var(--volt); }
.page-faq #feedback { --faq-accent: var(--pulse); }

.page-faq .faq-block__head {
  border-top: 2px solid var(--faq-accent, var(--volt));
  padding-top: 16px;
}

.page-faq .faq-block__eyebrow {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--faq-accent, var(--volt));
}

.page-faq .faq-block__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 3.4vw, 34px);
  line-height: 1.16;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-faq .faq-block__desc {
  margin: 12px 0 0;
  max-width: 34ch;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

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

/* ---------- 手风琴条目 ---------- */
.page-faq .faq-item {
  position: relative;
  border-bottom: 1px solid var(--line);
  transition: background .2s ease;
}

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

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--faq-accent, var(--electric));
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform .22s ease;
}

.page-faq .faq-item[open]::before {
  transform: scaleY(1);
}

.page-faq .faq-item:hover {
  background: rgba(233, 255, 245, .03);
}

.page-faq .faq-item[open] {
  background: rgba(233, 255, 245, .05);
}

.page-faq .faq-item > summary {
  list-style: none;
}

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

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) 14px;
  gap: 10px;
  align-items: center;
  padding: 17px 16px 17px 18px;
  cursor: pointer;
  font-size: 15.5px;
  font-weight: 500;
  line-height: 1.5;
  color: var(--ink);
  transition: color .18s ease;
}

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

.page-faq .faq-item[open] .faq-item__q {
  color: var(--faq-accent, var(--volt));
}

.page-faq .faq-item__no {
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--muted);
}

.page-faq .faq-item[open] .faq-item__no {
  color: var(--faq-accent, var(--volt));
}

.page-faq .faq-item__mark {
  position: relative;
  display: block;
  width: 14px;
  height: 14px;
  justify-self: end;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--muted);
  transition: transform .22s ease, background .22s ease;
}

.page-faq .faq-item__mark::before {
  left: 0;
  right: 0;
  top: 6px;
  height: 2px;
}

.page-faq .faq-item__mark::after {
  top: 0;
  bottom: 0;
  left: 6px;
  width: 2px;
}

.page-faq .faq-item[open] .faq-item__mark::before {
  background: var(--faq-accent, var(--volt));
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: scaleY(0);
  background: var(--faq-accent, var(--volt));
}

.page-faq .faq-item__a {
  padding: 0 22px 22px 72px;
  animation: faq-reveal .22s ease-out;
}

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

.page-faq .faq-item__a a {
  color: var(--electric);
  text-decoration: underline;
  text-underline-offset: 3px;
}

@keyframes faq-reveal {
  from {
    opacity: 0;
    transform: translateY(-5px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-faq .faq-more {
  margin: 20px 0 0;
  padding: 14px 18px;
  border-left: 3px solid var(--electric);
  background: rgba(51, 214, 255, .07);
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-faq .faq-more a {
  color: var(--electric);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 信息图 ---------- */
.page-faq .faq-figure {
  margin: clamp(24px, 4vw, 38px) 0 0;
  padding: 0;
}

.page-faq .faq-figure__frame {
  border: 1px solid var(--line-strong);
  background: var(--pitch-mid);
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}

.page-faq .faq-figure__frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  opacity: .94;
}

.page-faq .faq-figure figcaption {
  display: block;
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted);
}

/* ---------- 联络 ---------- */
.page-faq .faq-contact {
  padding-top: clamp(52px, 8vw, 96px);
}

.page-faq .faq-contact__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  border-top: 2px solid var(--pulse);
  padding-top: 22px;
}

.page-faq .faq-contact__eyebrow {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--pulse);
}

.page-faq .faq-contact__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 4vw, 40px);
  line-height: 1.12;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-faq .faq-contact__lead {
  margin: 0 0 22px;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-faq .faq-contact__btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

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

.page-faq .faq-contact__channels li {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-contact__channels li:first-child {
  border-top: 1px solid var(--line);
}

.page-faq .faq-contact__k {
  font-size: 13px;
  color: var(--muted);
}

.page-faq .faq-contact__v {
  font-size: 15px;
  color: var(--ink);
  word-break: break-word;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-contact__inner {
    grid-template-columns: minmax(0, 9fr) minmax(0, 7fr);
    gap: clamp(28px, 5vw, 64px);
    align-items: start;
  }
}

@media (min-width: 880px) {
  .page-faq .faq-block__grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 15fr);
    gap: clamp(26px, 4vw, 58px);
  }

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

  .page-faq .faq-figure--narrow {
    max-width: 78%;
  }
}

@media (max-width: 560px) {
  .page-faq .faq-item__q {
    grid-template-columns: 34px minmax(0, 1fr) 13px;
    gap: 8px;
    padding: 15px 14px 15px 15px;
    font-size: 15px;
  }

  .page-faq .faq-item__a {
    padding: 0 16px 20px 15px;
  }

  .page-faq .faq-contact__channels li {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .page-faq .faq-hero__meta {
    gap: 8px 18px;
  }
}

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

  .page-faq .faq-item__a {
    animation: none;
  }
}