.page-faq {
  --faq-index-w: 292px;
  --faq-sticky-top: calc(var(--header-h) + var(--track-h) + 20px);
  background: var(--ink);
  color: var(--on-dark);
  padding-top: calc(var(--header-h) + var(--track-h));
  padding-bottom: clamp(60px, 9vw, 116px);
  font-size: 16px;
  line-height: 1.72;
}

/* ---------- 顶部提示条 ---------- */
.page-faq .faq-alert {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--neon);
  color: var(--ink);
  padding: 11px var(--gutter);
  font-size: 13.5px;
  font-weight: 600;
  line-height: 1.5;
}

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

.page-faq .faq-alert a {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 2px;
}

.page-faq .faq-alert a:hover,
.page-faq .faq-alert a:focus-visible {
  text-decoration-color: var(--ink-2);
}

.page-faq .faq-alert__pip {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink);
  box-shadow: 0 0 0 4px rgba(11, 15, 12, .16);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  padding: clamp(38px, 6vw, 78px) 0 clamp(28px, 4vw, 44px);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-size: clamp(34px, 8.4vw, 68px);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -.02em;
  transform: skewX(-2deg);
  transform-origin: 0 100%;
  color: var(--on-dark);
}

.page-faq .faq-hero .lead {
  margin: 20px 0 0;
  max-width: 46ch;
  font-size: clamp(15px, 2.4vw, 17px);
  line-height: 1.78;
  color: var(--on-dark-dim);
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin: 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-hero__stat {
  flex: 1 1 40%;
  min-width: 0;
  padding: 16px 14px 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero__stat dt {
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--on-dark-dim);
}

.page-faq .faq-hero__stat dd {
  margin: 6px 0 0;
  font-size: 22px;
  font-weight: 800;
  color: var(--amber);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -.01em;
}

.page-faq .faq-hero__stat dd .num {
  color: inherit;
}

/* ---------- 横幅图 ---------- */
.page-faq .faq-banner {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-2);
}

.page-faq .faq-banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1600 / 600;
  object-fit: cover;
}

.page-faq .faq-banner figcaption {
  padding: 12px 18px 14px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--on-dark-dim);
  border-top: 1px solid var(--line);
}

/* ---------- 主体分屏 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 5vw, 56px);
  margin-top: clamp(38px, 5.5vw, 68px);
}

/* ---------- 左侧分类索引 ---------- */
.page-faq .faq-index__box {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-2);
  padding: 22px 20px 22px;
}

.page-faq .faq-index__title {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--on-dark-dim);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-index__list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 12px 11px 14px;
  border-left: 2px solid var(--line);
  color: var(--on-dark-dim);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: color var(--t), background var(--t), border-color var(--t);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  border-left-color: var(--neon);
  background: rgba(182, 255, 60, .07);
  color: var(--on-dark);
  outline: none;
}

.page-faq .faq-index__count {
  flex: 0 0 auto;
  font-size: 12px;
  color: var(--amber);
  letter-spacing: .04em;
}

.page-faq .faq-index__quick {
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-index__quick p {
  margin: 0 0 14px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--on-dark-dim);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + var(--track-h) + 18px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(42px, 6vw, 76px);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__no {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--neon);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(21px, 3.6vw, 30px);
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--on-dark);
}

/* ---------- 单条问答 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-item > summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: start;
  gap: 16px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--on-dark);
  transition: color var(--t);
}

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

.page-faq .faq-item > summary:hover {
  color: var(--neon);
}

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
}

.page-faq .faq-item > summary::after {
  content: "";
  width: 9px;
  height: 9px;
  margin-top: 5px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  transition: transform 200ms cubic-bezier(.2, .7, .3, 1);
}

.page-faq .faq-item[open] > summary::after {
  transform: rotate(-135deg);
  margin-top: 9px;
  color: var(--neon);
}

.page-faq .faq-item__body {
  margin: 0 0 20px;
  padding-left: 20px;
  border-left: 1px solid var(--line-soft);
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--on-dark-dim);
}

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

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

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

/* ---------- 暖纸纠错区 ---------- */
.page-faq .faq-group--paper {
  background: var(--paper);
  color: var(--ink);
  border-radius: var(--radius);
  padding: clamp(24px, 4vw, 44px) clamp(20px, 3.6vw, 40px) clamp(8px, 2vw, 16px);
  border: 1px solid rgba(11, 15, 12, .1);
}

.page-faq .faq-group--paper .faq-group__head {
  border-bottom-color: rgba(11, 15, 12, .16);
}

.page-faq .faq-group--paper .faq-group__no {
  color: var(--neon-deep);
}

.page-faq .faq-group--paper .faq-group__title {
  color: var(--ink);
}

.page-faq .faq-group--paper .faq-item {
  border-bottom-color: rgba(11, 15, 12, .12);
}

.page-faq .faq-group--paper .faq-item > summary {
  color: var(--ink);
}

.page-faq .faq-group--paper .faq-item > summary:hover {
  color: var(--neon-deep);
}

.page-faq .faq-group--paper .faq-item[open] > summary::after {
  color: var(--neon-deep);
}

.page-faq .faq-group--paper .faq-item__body {
  border-left-color: rgba(143, 212, 0, .5);
  color: var(--muted);
}

.page-faq .faq-group--paper .faq-item__body a {
  color: var(--ink);
  text-decoration-color: var(--neon-deep);
}

.page-faq .faq-fix-figure {
  margin: 20px 0 8px;
  max-width: 400px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(11, 15, 12, .12);
  background: var(--card);
}

.page-faq .faq-fix-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 900 / 600;
  object-fit: cover;
}

.page-faq .faq-fix__more {
  display: grid;
  gap: 16px;
  margin: 26px 0 24px;
  padding: 22px 22px 24px;
  background: var(--ink);
  color: var(--on-dark);
  border-radius: var(--radius);
}

.page-faq .faq-fix__more p {
  margin: 0;
  max-width: 52ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--on-dark-dim);
}

.page-faq .faq-fix__more .btn {
  justify-self: start;
}

/* ---------- 页尾延伸 ---------- */
.page-faq .faq-tail {
  margin-top: clamp(48px, 7vw, 88px);
  padding-top: clamp(28px, 4vw, 44px);
  border-top: 1px solid var(--line);
  display: grid;
  gap: 28px;
}

.page-faq .faq-tail h2 {
  margin: 12px 0 0;
  font-size: clamp(22px, 3.8vw, 30px);
  font-weight: 800;
  letter-spacing: -.01em;
}

.page-faq .faq-tail__text p:last-child {
  margin: 14px 0 0;
  max-width: 50ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--on-dark-dim);
}

.page-faq .faq-tail__links {
  display: grid;
  gap: 2px;
}

.page-faq .faq-tail__link {
  display: grid;
  gap: 4px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-2);
  text-decoration: none;
  transition: border-color var(--t), background var(--t), transform var(--t);
}

.page-faq .faq-tail__link:hover,
.page-faq .faq-tail__link:focus-visible {
  border-left-color: var(--neon);
  background: rgba(182, 255, 60, .06);
  transform: translateY(-2px);
  outline: none;
}

.page-faq .faq-tail__link-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--on-dark);
}

.page-faq .faq-tail__link-desc {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--on-dark-dim);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-faq .faq-hero__stat {
    flex: 1 1 30%;
  }

  .page-faq .faq-fix__more {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .page-faq .faq-tail__links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-tail__link {
    min-height: 100%;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 80px);
    align-items: end;
  }

  .page-faq .faq-hero__stats {
    flex-direction: column;
  }

  .page-faq .faq-hero__stat {
    flex: 0 0 auto;
    padding-right: 0;
  }

  .page-faq .faq-tail {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index__box {
    position: sticky;
    top: var(--faq-sticky-top);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item > summary::after,
  .page-faq .faq-tail__link,
  .page-faq .faq-index__list a {
    transition: none;
  }

  .page-faq .faq-hero h1 {
    transform: none;
  }
}