.page-faq {
  --faq-side-w: 216px;
  --faq-gap: 44px;
  --faq-tint: rgba(53, 214, 200, .09);
  --faq-tint-strong: rgba(255, 107, 53, .12);
}

/* ---------- 首屏说明区 ---------- */
.page-faq .faq-intro {
  display: grid;
  gap: 24px;
  padding: 22px 0 30px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-intro__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(30px, 7.4vw, 54px);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: .01em;
  color: var(--text);
}

.page-faq .faq-intro__lead {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--ink-text);
}

.page-faq .faq-intro__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
}

.page-faq .faq-stat {
  flex: 1 1 104px;
  min-width: 0;
  padding: 12px 14px;
  background: var(--ink-800);
  border-radius: var(--radius-s);
  border-left: 3px solid var(--cyan);
}

.page-faq .faq-stat__label {
  display: block;
  font-size: var(--fs-12);
  letter-spacing: .1em;
  color: var(--slate-lift);
}

.page-faq .faq-stat__value {
  display: block;
  margin: 4px 0 0;
  font-size: var(--fs-24);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

/* ---------- 章节导航 + 问答流 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: 26px;
  padding-top: 30px;
}

.page-faq .faq-side {
  border-left: 2px solid var(--line);
  padding-left: 14px;
}

.page-faq .faq-side__caption {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .16em;
  color: var(--slate);
}

.page-faq .faq-side__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-faq .faq-side__item {
  flex: none;
}

.page-faq .faq-side__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 12px;
  border-radius: var(--radius-s);
  font-size: var(--fs-14);
  color: var(--slate);
  text-decoration: none;
  white-space: nowrap;
  transition: color .2s var(--ease-out), background-color .2s var(--ease-out);
}

.page-faq .faq-side__link:hover,
.page-faq .faq-side__link:focus-visible {
  color: var(--cyan-deep);
  background: var(--faq-tint);
}

.page-faq .faq-side__idx {
  font-size: var(--fs-12);
  color: var(--amber-deep);
}

/* ---------- 区块 ---------- */
.page-faq .faq-flow {
  min-width: 0;
}

.page-faq .faq-block {
  padding: 0 0 34px;
  scroll-margin-top: calc(var(--bar-h) + 20px);
}

.page-faq .faq-block + .faq-block {
  padding-top: 32px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-block__idx {
  display: inline-block;
  padding: 2px 10px;
  border: 1px solid var(--orange-deep);
  border-radius: 999px;
  font-size: var(--fs-12);
  letter-spacing: .12em;
  color: var(--orange-deep);
}

.page-faq .faq-block__title {
  margin: 12px 0 0;
  font-family: var(--font-editorial);
  font-size: clamp(22px, 4.4vw, 30px);
  font-weight: 600;
  line-height: 1.34;
  color: var(--text);
}

.page-faq .faq-block__lead {
  margin: 10px 0 0;
  max-width: 60ch;
  font-size: var(--fs-16);
  line-height: 1.78;
  color: var(--ink-text);
}

/* ---------- 指南章节列表 + 配图 ---------- */
.page-faq .guide-split {
  display: grid;
  gap: 22px;
  margin-top: 22px;
}

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

.page-faq .guide-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 16px 12px 16px 10px;
  border-top: 1px dashed var(--line);
  border-radius: var(--radius-s);
  transition: background-color .2s var(--ease-out);
}

.page-faq .guide-item:first-child {
  border-top: 0;
}

.page-faq .guide-item:hover {
  background: var(--faq-tint);
}

.page-faq .guide-item__idx {
  padding-top: 3px;
  font-size: var(--fs-14);
  font-weight: 700;
  color: var(--cyan-deep);
}

.page-faq .guide-item__title {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--fs-16);
  font-weight: 700;
  line-height: 1.5;
  color: var(--text);
}

.page-faq .guide-item__desc {
  margin: 5px 0 0;
  font-size: var(--fs-14);
  line-height: 1.72;
  color: var(--slate);
}

.page-faq .guide-item__link {
  display: inline-block;
  margin-top: 9px;
  padding-bottom: 1px;
  border-bottom: 1px solid currentColor;
  font-size: var(--fs-14);
  color: var(--orange-deep);
  text-decoration: none;
  transition: color .2s var(--ease-out);
}

.page-faq .guide-item__link:hover,
.page-faq .guide-item__link:focus-visible {
  color: var(--brick);
}

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

.page-faq .faq-media .media__frame {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
}

.page-faq .faq-media--wide {
  margin-top: 22px;
}

/* ---------- 问答组 ---------- */
.page-faq .qa {
  display: grid;
  gap: 10px;
  margin-top: 22px;
}

.page-faq .qa__item {
  overflow: hidden;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  transition: border-color .24s var(--ease-out), box-shadow .24s var(--ease-out);
}

.page-faq .qa__item[open] {
  border-color: var(--cyan);
  box-shadow: var(--shadow-card);
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-size: var(--fs-16);
  font-weight: 600;
  line-height: 1.62;
  color: var(--text);
  transition: color .2s var(--ease-out);
}

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

.page-faq .qa__q:hover {
  color: var(--cyan-deep);
}

.page-faq .qa__item[open] .qa__q {
  color: var(--cyan-deep);
}

.page-faq .qa__idx {
  flex: none;
  padding-top: 3px;
  font-size: var(--fs-12);
  color: var(--slate);
}

.page-faq .qa__text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .qa__chev {
  flex: none;
  width: 9px;
  height: 9px;
  margin-top: 7px;
  border-right: 2px solid var(--slate);
  border-bottom: 2px solid var(--slate);
  transform: rotate(45deg);
  transition: transform .24s var(--ease-out), border-color .24s var(--ease-out);
}

.page-faq .qa__item[open] .qa__chev {
  border-color: var(--cyan-deep);
  transform: rotate(-135deg);
}

.page-faq .qa__a {
  padding: 0 18px 18px 18px;
  font-size: var(--fs-16);
  line-height: 1.82;
  color: var(--ink-text);
}

.page-faq .qa__a p {
  margin: 0;
}

.page-faq .qa__a p + p {
  margin-top: 8px;
}

.page-faq .qa__a a {
  color: var(--cyan-deep);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-faq .qa__a a:hover,
.page-faq .qa__a a:focus-visible {
  color: var(--orange-deep);
}

/* ---------- 兜底路径 ---------- */
.page-faq .faq-next {
  margin-top: 22px;
  padding: 22px 20px 24px;
  background: var(--ink-800);
  border-radius: var(--radius-m);
  border-left: 4px solid var(--orange);
}

.page-faq .faq-next__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-next__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
}

.page-faq .faq-next__num {
  font-size: var(--fs-12);
  color: var(--amber);
}

.page-faq .faq-next__text {
  font-size: var(--fs-16);
  line-height: 1.72;
  color: var(--paper);
}

.page-faq .faq-next__note {
  margin: 20px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line-dark);
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--slate-lift);
}

.page-faq .faq-next__note strong {
  font-weight: 500;
  color: var(--cyan);
}

.page-faq .faq-next__note a {
  color: var(--orange);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

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

.page-faq .faq-next__actions {
  margin-top: 20px;
}

/* ---------- 当前分区高亮 ---------- */
.page-faq:has(#guide:target) .faq-side__link[href="#guide"],
.page-faq:has(#download:target) .faq-side__link[href="#download"],
.page-faq:has(#order:target) .faq-side__link[href="#order"],
.page-faq:has(#mobile:target) .faq-side__link[href="#mobile"],
.page-faq:has(#next:target) .faq-side__link[href="#next"] {
  color: var(--cyan-deep);
  background: var(--faq-tint-strong);
}

/* ---------- 展开动效 ---------- */
.page-faq .qa__item[open] .qa__a {
  animation: faq-reveal .24s var(--ease-out) both;
}

@keyframes faq-reveal {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-intro {
    padding: 30px 0 38px;
  }

  .page-faq .faq-stat {
    flex: 0 1 auto;
    min-width: 118px;
  }

  .page-faq .qa__q {
    padding: 17px 22px;
    gap: 14px;
  }

  .page-faq .qa__a {
    padding: 0 24px 20px 60px;
  }

  .page-faq .faq-next {
    padding: 26px 26px 28px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-intro {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 48px;
    padding: 40px 0 46px;
  }

  .page-faq .faq-intro__stats {
    flex-direction: column;
    flex-wrap: nowrap;
  }

  .page-faq .guide-split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 30px;
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-side-w) minmax(0, 1fr);
    gap: var(--faq-gap);
    padding-top: 40px;
    align-items: start;
  }

  .page-faq .faq-side {
    position: sticky;
    top: calc(var(--bar-h) + 18px);
    padding-left: 16px;
  }

  .page-faq .faq-side__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
  }

  .page-faq .faq-side__link {
    padding: 8px 10px;
  }

  .page-faq:has(#guide:target) .faq-side__link[href="#guide"],
  .page-faq:has(#download:target) .faq-side__link[href="#download"],
  .page-faq:has(#order:target) .faq-side__link[href="#order"],
  .page-faq:has(#mobile:target) .faq-side__link[href="#mobile"],
  .page-faq:has(#next:target) .faq-side__link[href="#next"] {
    box-shadow: inset 3px 0 0 var(--cyan);
  }
}

@media (min-width: 1280px) {
  .page-faq .faq-intro__title {
    max-width: 22ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__item[open] .qa__a {
    animation: none;
  }

  .page-faq .qa__chev,
  .page-faq .qa__item,
  .page-faq .faq-side__link,
  .page-faq .guide-item,
  .page-faq .qa__q {
    transition: none;
  }
}