.page-faq {
  background: var(--ink);
  color: var(--text);
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-faq .crumbs {
  padding-top: clamp(14px, 2.6vw, 24px);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--dim);
}

.page-faq .crumbs a {
  color: var(--dim);
  text-decoration: none;
}

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

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  background-color: var(--ink);
  background-image:
    linear-gradient(to right, rgba(31, 58, 46, .6) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(31, 58, 46, .6) 1px, transparent 1px);
  background-size: 64px 64px;
  border-bottom: 1px solid var(--grid);
  padding: clamp(22px, 4vw, 44px) 0 clamp(22px, 4vw, 40px);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(20px, 3.4vw, 36px);
}

.page-faq .faq-hero__main h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(30px, 6.2vw, 56px);
  line-height: 1.04;
  letter-spacing: -.02em;
  margin: 10px 0 0;
  color: var(--text);
}

.page-faq .faq-hero__lede {
  margin: 16px 0 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--dim);
}

.page-faq .faq-hero__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
}

.page-faq .faq-hero__stats li {
  background: var(--ink);
  padding: 10px 8px 12px;
  min-width: 0;
}

.page-faq .faq-hero__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(20px, 3.4vw, 28px);
  line-height: 1.1;
  color: var(--lime);
}

.page-faq .faq-hero__num--time {
  font-size: clamp(12px, 2vw, 15px);
  letter-spacing: -.01em;
  color: var(--orange);
  padding-top: 6px;
}

.page-faq .faq-hero__k {
  display: block;
  margin-top: 6px;
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--dim);
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
  padding-top: clamp(24px, 4vw, 44px);
}

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

/* ---------- 侧栏 ---------- */
.page-faq .faq-rail__box {
  border: 1px solid var(--grid);
  background: var(--panel);
  padding: 14px;
}

.page-faq .faq-rail__title {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--dim);
  text-transform: uppercase;
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-rail__list li {
  flex: none;
}

.page-faq .faq-rail__list a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 40px;
  padding: 0 12px;
  border: 1px solid var(--grid);
  color: var(--text);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-rail__list a:hover,
.page-faq .faq-rail__list a:focus-visible {
  border-color: var(--lime);
  color: var(--lime);
}

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

.page-faq .faq-rail__home {
  display: flex;
  width: 100%;
  margin-top: 12px;
  justify-content: center;
}

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

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 84px;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(34px, 5vw, 56px);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 14px;
  align-items: center;
  border-bottom: 1px solid var(--grid);
  padding-bottom: 10px;
  margin-bottom: 16px;
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 4.6vw, 38px);
  line-height: 1;
  color: var(--muted);
  opacity: .7;
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 3vw, 28px);
  letter-spacing: -.01em;
  line-height: 1.15;
  color: var(--text);
}

.page-faq .faq-group__desc {
  grid-column: 1 / -1;
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--dim);
}

/* ---------- 手风琴 ---------- */
.page-faq .qa {
  border: 1px solid var(--grid);
  background: var(--panel);
}

.page-faq .qa + .qa {
  margin-top: -1px;
}

.page-faq .qa[open] {
  border-color: var(--grid);
  background: var(--ink);
}

.page-faq .qa__q {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 52px;
  padding: 14px clamp(14px, 2.4vw, 20px);
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text);
  transition: background-color var(--dur) var(--ease);
}

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

.page-faq .qa__q:hover,
.page-faq .qa__q:focus-visible {
  background: var(--grid);
}

.page-faq .qa__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--lime);
  letter-spacing: .02em;
}

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

.page-faq .qa__mark {
  flex: none;
  position: relative;
  width: 14px;
  height: 14px;
  margin-left: auto;
}

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

.page-faq .qa__mark::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}

.page-faq .qa__mark::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
}

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

.page-faq .qa__a {
  background: var(--paper);
  color: var(--ink);
  border-left: 3px solid var(--lime);
  padding: 14px clamp(16px, 2.8vw, 24px) 18px;
  font-size: 15px;
  line-height: 1.75;
}

.page-faq .qa__a p {
  margin: 0;
  max-width: 34em;
}

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

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

.page-faq .qa__a .k {
  font-weight: 700;
  color: var(--ink);
  background: linear-gradient(transparent 62%, rgba(200, 255, 61, .9) 62%);
  padding: 0 1px;
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 0 0 16px;
}

.page-faq .faq-figure .figure__media {
  border: 1px solid var(--grid);
  background: var(--panel);
  overflow: hidden;
}

.page-faq .faq-figure--tall .figure__media {
  aspect-ratio: 3 / 4;
  max-width: 340px;
}

.page-faq .faq-figure--wide .figure__media {
  aspect-ratio: 3 / 2;
}

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

.page-faq .faq-figure .figure__cap {
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--dim);
  max-width: 30em;
}

/* ---------- 联系条 ---------- */
.page-faq .faq-contact {
  margin-top: 18px;
  border: 1px solid var(--grid);
  border-left: 3px solid var(--orange);
  background: var(--panel);
  padding: 14px clamp(14px, 2.4vw, 20px);
}

.page-faq .faq-contact__row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  margin: 0;
  padding: 6px 0;
  font-size: 14px;
  line-height: 1.6;
}

.page-faq .faq-contact__row + .faq-contact__row {
  border-top: 1px solid var(--grid);
}

.page-faq .faq-contact__k {
  flex: none;
  min-width: 72px;
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--dim);
  padding-top: 3px;
}

.page-faq .faq-contact__v {
  font-family: var(--font-mono);
  color: var(--text);
  word-break: break-word;
}

.page-faq .faq-contact__hint {
  margin: 10px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 收尾 ---------- */
.page-faq .faq-tail {
  margin-top: clamp(34px, 5vw, 56px);
  border: 1px solid var(--grid);
  background:
    linear-gradient(105deg, rgba(200, 255, 61, .1), rgba(59, 91, 255, .12)),
    var(--ink);
  padding: clamp(20px, 3.4vw, 32px);
}

.page-faq .faq-tail__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 3vw, 28px);
  letter-spacing: -.01em;
  color: var(--text);
}

.page-faq .faq-tail__text {
  margin: 10px 0 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--dim);
}

.page-faq .faq-tail__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-group--media .faq-group__body {
    display: grid;
    grid-template-columns: 240px minmax(0, 1fr);
    gap: clamp(16px, 2.6vw, 28px);
    align-items: start;
  }

  .page-faq .faq-group--media .faq-figure {
    margin-bottom: 0;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: end;
  }

  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 1fr) 292px;
    align-items: start;
  }

  .page-faq .faq-main {
    grid-column: 1;
    grid-row: 1;
  }

  .page-faq .faq-rail {
    grid-column: 2;
    grid-row: 1;
  }

  .page-faq .faq-rail__box {
    position: sticky;
    top: 76px;
  }

  .page-faq .faq-rail__list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-rail__list li + li {
    margin-top: 6px;
  }

  .page-faq .faq-rail__list a {
    display: flex;
    width: 100%;
    padding: 0 10px;
    white-space: normal;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__mark::before,
  .page-faq .qa__mark::after,
  .page-faq .qa__q,
  .page-faq .faq-rail__list a {
    transition: none;
  }
}

</main>