.page-faq {
  --faq-pad: 18px;
  --faq-mark: 16px;
  --faq-gap: 12px;
  --faq-cut: 20px;
  color: var(--paper);
}

@media (min-width: 700px) {
  .page-faq {
    --faq-pad: 24px;
    --faq-gap: 14px;
    --faq-cut: 22px;
  }
}

/* 首屏 */
.page-faq .faq-hero {
  display: grid;
  gap: 30px;
  padding: 24px 0 48px;
  align-items: center;
}

.page-faq .faq-hero__kicker {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--brass);
}

.page-faq .faq-hero__title {
  margin: 0 0 20px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(30px, 6vw, 58px);
  line-height: 1.16;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 54ch;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.85;
  color: rgba(245, 242, 233, 0.72);
}

.page-faq .faq-hero__figure {
  margin: 0;
  padding: 10px;
  background: var(--plateau);
  border: 1px solid var(--line);
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  filter: saturate(0.7) brightness(0.92);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 56px;
    padding: 40px 0 76px;
  }
}

/* 分组跳转条（窄屏） */
.page-faq .faq-jump {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 0 0 26px;
  border-bottom: 1px solid var(--hair);
  scrollbar-width: none;
}

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

.page-faq .faq-jump__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--paper);
  text-decoration: none;
  background: var(--plateau);
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

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

.page-faq .faq-jump__link:hover {
  color: var(--brass-lite);
  border-color: var(--brass);
}

/* 主体：左索引 + 右问答 */
.page-faq .faq-body {
  display: grid;
  gap: 32px;
  padding-top: 40px;
}

.page-faq .faq-rail {
  display: none;
}

@media (min-width: 900px) {
  .page-faq .faq-jump {
    display: none;
  }

  .page-faq .faq-body {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 56px;
    padding-top: 56px;
  }

  .page-faq .faq-rail {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
  }
}

.page-faq .faq-rail__caption {
  margin: 0 0 16px;
  padding-left: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--note);
}

.page-faq .faq-rail__link {
  display: block;
  padding: 11px 0 11px 16px;
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--note);
  text-decoration: none;
  border-left: 2px solid var(--line-soft);
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-faq .faq-rail__num {
  margin-right: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--brass);
}

.page-faq .faq-rail__link:hover {
  color: var(--paper);
  border-left-color: var(--brass);
}

/* 问答分组 */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 28px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(44px, 7vw, 88px);
  padding-top: clamp(44px, 7vw, 88px);
  border-top: 1px solid var(--hair);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 26px;
}

.page-faq .faq-group__num {
  margin: 0;
  flex: 0 0 auto;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--brass);
  border: 1px solid var(--line);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(22px, 3.4vw, 32px);
  letter-spacing: 0.03em;
  color: var(--paper);
}

.page-faq .faq-group__head::after {
  content: "";
  flex: 1;
  height: 1px;
  min-width: 24px;
  transform: skewY(-2deg);
  background: linear-gradient(90deg, var(--line), transparent);
}

/* 条目 */
.page-faq .faq-item {
  position: relative;
  background: var(--plateau);
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, calc(100% - var(--faq-cut)) 0, 100% var(--faq-cut), 100% 100%, 0 100%);
  transition: border-color 0.3s var(--ease), background-color 0.3s var(--ease);
}

.page-faq .faq-item + .faq-item {
  margin-top: 12px;
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: linear-gradient(180deg, transparent, var(--line), transparent);
  transition: background 0.3s var(--ease);
}

.page-faq .faq-item[open] {
  border-color: var(--line);
  background: #17375a;
}

.page-faq .faq-item[open]::before {
  background: linear-gradient(180deg, var(--brass), var(--brass-lite), var(--brass));
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: var(--faq-gap);
  padding: var(--faq-pad);
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.55;
  color: var(--paper);
}

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

.page-faq .faq-item__mark {
  position: relative;
  flex: 0 0 auto;
  width: var(--faq-mark);
  height: var(--faq-mark);
  margin-top: 4px;
  border: 1px solid var(--line);
  transition: border-color 0.3s var(--ease);
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--brass);
  transition: opacity 0.25s var(--ease), transform 0.3s var(--ease);
}

.page-faq .faq-item__mark::before {
  left: 3px;
  right: 3px;
  top: 50%;
  height: 1px;
  transform: translateY(-50%);
}

.page-faq .faq-item__mark::after {
  top: 3px;
  bottom: 3px;
  left: 50%;
  width: 1px;
  transform: translateX(-50%);
}

.page-faq .faq-item[open] .faq-item__mark {
  border-color: var(--brass);
}

.page-faq .faq-item[open] .faq-item__mark::after {
  opacity: 0;
  transform: translateX(-50%) scaleY(0);
}

.page-faq .faq-item__body {
  padding: 0 var(--faq-pad) var(--faq-pad);
  padding-left: calc(var(--faq-pad) + var(--faq-mark) + var(--faq-gap));
}

.page-faq .faq-item__body p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.9;
  color: rgba(245, 242, 233, 0.76);
}

.page-faq .faq-item__body a {
  color: var(--brass-lite);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-item__body a:hover {
  border-bottom-color: var(--brass-lite);
}

.page-faq .faq-item[open] .faq-item__body {
  animation: faq-slide 0.38s var(--ease) both;
}

@keyframes faq-slide {
  from {
    opacity: 0;
    transform: translate(-12px, -8px);
  }
  to {
    opacity: 1;
    transform: translate(0, 0);
  }
}

/* 通栏呼吸图 */
.page-faq .faq-band {
  margin: clamp(44px, 7vw, 88px) 0 0;
  padding-top: clamp(44px, 7vw, 88px);
  border-top: 1px solid var(--hair);
}

.page-faq .faq-band img {
  display: block;
  width: 100%;
  height: auto;
  filter: saturate(0.65) brightness(0.85);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-faq .faq-band figcaption {
  margin-top: 12px;
  font-family: var(--font-body);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--note);
}

/* 收尾入口 */
.page-faq .faq-outro {
  display: grid;
  gap: 20px;
  margin-top: clamp(50px, 8vw, 96px);
  padding: clamp(26px, 4vw, 44px);
  background: var(--wine);
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 0 100%);
}

.page-faq .faq-outro__title {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(20px, 3vw, 26px);
  letter-spacing: 0.03em;
  color: var(--paper);
}

.page-faq .faq-outro__text {
  margin: 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.8;
  color: rgba(245, 242, 233, 0.82);
}

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

@media (min-width: 900px) {
  .page-faq .faq-outro {
    grid-template-columns: minmax(0, 1.5fr) auto;
    align-items: center;
    gap: 32px;
  }

  .page-faq .faq-outro .btn {
    justify-self: end;
  }
}

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

  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after {
    transition: none;
  }
}