.page-faq {
  --faq-line: rgba(17, 21, 18, 0.13);
  --faq-line-soft: rgba(17, 21, 18, 0.07);
  --faq-tint: rgba(232, 255, 58, 0.22);
  --faq-mark: rgba(242, 194, 0, 0.3);
  --faq-sheet: rgba(255, 255, 255, 0.66);
  background: var(--paper);
  color: var(--black);
}

/* ---------- 封面 ---------- */
.page-faq .faq-cover {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: var(--paper);
  padding: clamp(22px, 4vw, 42px) 0 0;
  border-radius: 0 0 var(--r-lg) var(--r-lg);
}

.page-faq .faq-cover .breadcrumb__list,
.page-faq .faq-cover .breadcrumb__link {
  color: var(--ash);
}

.page-faq .faq-cover .breadcrumb__link:hover,
.page-faq .faq-cover .breadcrumb__link:focus-visible {
  color: var(--flare);
}

.page-faq .faq-cover__eyebrow {
  margin: clamp(20px, 3vw, 32px) 0 0;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--flare);
}

.page-faq .faq-cover__title {
  margin: 14px 0 0;
  font-size: clamp(32px, 6.2vw, 74px);
  font-weight: 300;
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--paper);
  max-width: 22ch;
  text-wrap: balance;
}

.page-faq .faq-cover__lede {
  margin: 20px 0 0;
  max-width: 46ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--ash);
}

.page-faq .faq-cover__media {
  margin-top: clamp(24px, 4vw, 44px);
}

.page-faq .faq-cover__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--r-lg) var(--r-lg) 0 0;
  filter: saturate(0.68) contrast(1.03) brightness(0.96);
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-body {
  padding: clamp(30px, 5vw, 66px) 0 clamp(48px, 7vw, 88px);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

/* ---------- 左侧分组索引（移动端横滑） ---------- */
.page-faq .faq-rail__title {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-faq .faq-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 8px 14px;
  border: 1px solid var(--ash);
  border-radius: var(--r-pill);
  font-size: 13px;
  line-height: 1.2;
  color: var(--soft);
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  background: var(--flare);
  border-color: var(--flare);
  color: var(--black);
}

.page-faq .faq-rail__dot {
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ash);
  transition: background-color 0.18s ease;
}

.page-faq .faq-rail__link:hover .faq-rail__dot,
.page-faq .faq-rail__link:focus-visible .faq-rail__dot {
  background: var(--black);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group + .faq-group {
  margin-top: clamp(38px, 5.5vw, 68px);
  padding-top: clamp(28px, 4vw, 46px);
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-group__head {
  margin-bottom: 16px;
}

.page-faq .faq-group__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-faq .faq-group__title {
  margin: 8px 0 0;
  font-size: clamp(23px, 2.8vw, 32px);
  font-weight: 400;
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-group__lead {
  margin: 10px 0 0;
  max-width: 56ch;
  font-size: 14px;
  line-height: 1.72;
  color: var(--soft);
}

/* ---------- 问答条目 ---------- */
.page-faq .qa {
  position: relative;
  border-bottom: 1px solid var(--faq-line-soft);
}

.page-faq .qa__input {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.page-faq .qa__row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) 18px;
  align-items: start;
  gap: 12px;
  padding: 15px 10px 15px 13px;
  cursor: pointer;
  box-shadow: inset 3px 0 0 transparent;
  transition: background-color 0.18s ease, box-shadow 0.18s ease;
}

.page-faq .qa__row:hover {
  background: var(--faq-tint);
  box-shadow: inset 3px 0 0 var(--card-yellow);
}

.page-faq .qa__input:focus-visible ~ .qa__row {
  outline: 2px solid var(--ink);
  outline-offset: -2px;
}

.page-faq .qa__input:checked ~ .qa__row {
  background: var(--faq-tint);
  box-shadow: inset 3px 0 0 var(--flare);
}

.page-faq .qa__no {
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-faq .qa__q {
  font-size: clamp(15px, 1.7vw, 17px);
  font-weight: 500;
  line-height: 1.6;
  color: var(--black);
}

.page-faq .qa__sign {
  position: relative;
  justify-self: end;
  width: 16px;
  height: 16px;
  margin-top: 3px;
}

.page-faq .qa__sign::before,
.page-faq .qa__sign::after {
  content: "";
  position: absolute;
  background: var(--ink);
  transition: transform 0.22s ease, background-color 0.22s ease;
}

.page-faq .qa__sign::before {
  top: 7px;
  left: 0;
  width: 16px;
  height: 2px;
}

.page-faq .qa__sign::after {
  left: 7px;
  top: 0;
  width: 2px;
  height: 16px;
}

.page-faq .qa__input:checked ~ .qa__row .qa__sign::after {
  transform: scaleY(0);
}

.page-faq .qa__input:checked ~ .qa__row .qa__sign::before {
  background: var(--card-yellow);
}

/* ---------- 答案解析 ---------- */
.page-faq .qa__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.3s ease;
}

.page-faq .qa__input:checked ~ .qa__panel {
  grid-template-rows: 1fr;
}

.page-faq .qa__panel-body {
  min-height: 0;
  overflow: hidden;
}

.page-faq .qa__panel-inner {
  margin: 0 10px 20px 14px;
  padding: 14px 16px;
  background: var(--faq-sheet);
  border-left: 1px solid var(--faq-line);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  box-shadow: inset 0 0 0 1px var(--faq-line-soft);
  font-size: 15px;
  line-height: 1.78;
  color: var(--soft);
}

.page-faq .qa__panel-inner p {
  margin: 0;
}

.page-faq .qa__panel-inner p + p {
  margin-top: 10px;
}

.page-faq .qa__panel-inner .num {
  padding: 1px 5px;
  font-family: var(--font-mono);
  font-weight: 500;
  color: var(--black);
  background: var(--faq-mark);
  border-radius: 4px;
}

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

.page-faq .qa__panel-inner a:hover,
.page-faq .qa__panel-inner a:focus-visible {
  background: var(--flare);
  text-decoration-color: var(--ink);
}

/* ---------- 截图 ---------- */
.page-faq .faq-shot {
  margin: clamp(24px, 3.5vw, 38px) 0 0;
  overflow: hidden;
  border-radius: var(--r-md);
}

.page-faq .faq-shot img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.7) contrast(1.03) brightness(0.97);
}

/* ---------- 底部 ---------- */
.page-faq .faq-cta {
  background: var(--ink-deep);
  color: var(--paper);
  padding: clamp(38px, 6vw, 76px) 0;
  border-radius: var(--r-lg) var(--r-lg) 0 0;
}

.page-faq .faq-cta__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--flare);
}

.page-faq .faq-cta__title {
  margin: 12px 0 0;
  color: var(--paper);
  font-weight: 300;
}

.page-faq .faq-cta__text {
  margin: 14px 0 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ash);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-faq .faq-cta .btn--ghost {
  color: var(--paper);
  border-color: rgba(244, 241, 232, 0.32);
}

.page-faq .faq-cta .btn--ghost:hover,
.page-faq .faq-cta .btn--ghost:focus-visible {
  color: var(--black);
  border-color: var(--flare);
}

/* ---------- 自适应 ---------- */
@media (min-width: 640px) {
  .page-faq .qa__row {
    grid-template-columns: auto minmax(0, 1fr) 20px;
    gap: 16px;
    padding: 17px 14px 17px 18px;
  }

  .page-faq .qa__panel-inner {
    margin: 0 14px 22px 40px;
    padding: 16px 20px;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: 216px minmax(0, 1fr);
    gap: clamp(34px, 4.5vw, 68px);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 4px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-rail__link {
    width: 100%;
    justify-content: flex-start;
    padding: 9px 14px;
    border-color: transparent;
    border-radius: var(--r-md);
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    border-color: var(--flare);
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-cover__media img {
    max-height: 460px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__panel,
  .page-faq .qa__row,
  .page-faq .qa__sign::before,
  .page-faq .qa__sign::after,
  .page-faq .faq-rail__link,
  .page-faq .faq-rail__dot {
    transition: none;
  }
}