.page-faq {
  --faq-rail-w: 250px;
  --faq-sticky-top: 6.5rem;
  --faq-ink-soft: #4d3f36;
  --faq-shell-gap: clamp(1.5rem, 3vw, 2.75rem);
  background: var(--nb-cream);
  color: var(--nb-ink);
  font-family: var(--nb-serif);
  font-size: 17px;
  line-height: 1.85;
  padding-block: 0 clamp(3rem, 8vw, 6rem);
}

.page-faq a {
  color: inherit;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  margin: clamp(1rem, 2.5vw, 1.75rem) 0 clamp(2rem, 5vw, 3.25rem);
  padding: clamp(1.9rem, 4.5vw, 3.4rem) clamp(1.25rem, 4vw, 3rem) clamp(1.5rem, 4vw, 3rem);
  background: var(--nb-white);
  border: var(--nb-bw-bold) solid var(--nb-clay);
  box-shadow: var(--nb-shadow);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 12px;
  background: repeating-linear-gradient(90deg, var(--nb-clay) 0 2px, transparent 2px 22px);
  opacity: 0.35;
}

.page-faq .faq-hero .nb-h1 {
  margin: 0.5rem 0 0.9rem;
  max-width: 18ch;
}

.page-faq .faq-hero .nb-lead {
  margin: 0 0 1.75rem;
  max-width: 64ch;
  color: var(--faq-ink-soft);
}

.page-faq .faq-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
  gap: 1rem 1.5rem;
  list-style: none;
  margin: 0 0 1.75rem;
  padding: 1.25rem 0 0;
  border-top: 2px dashed var(--nb-line);
}

.page-faq .faq-facts__item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.page-faq .faq-facts__n {
  font-family: var(--nb-mono);
  font-weight: 700;
  font-size: clamp(1.25rem, 3vw, 1.7rem);
  line-height: 1.15;
  color: var(--nb-orange);
}

.page-faq .faq-facts__l {
  font-family: var(--nb-sans);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--nb-caramel);
}

.page-faq .faq-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ---------- 主体网格 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-shell-gap);
  align-items: start;
}

/* ---------- 左侧粘性导航 ---------- */
.page-faq .faq-rail {
  border: var(--nb-bw) solid var(--nb-clay);
  background: var(--nb-white);
  box-shadow: var(--nb-shadow-sm);
  padding: 1.15rem 1rem 1.25rem;
  scroll-margin-top: var(--faq-sticky-top);
}

.page-faq .faq-rail__title {
  margin: 0 0 0.85rem;
  font-family: var(--nb-sans);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--nb-caramel);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.2rem;
}

.page-faq .faq-rail__link {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  padding: 0.55rem 0.6rem;
  border-left: 4px solid transparent;
  font-family: var(--nb-sans);
  font-size: 15px;
  font-weight: 800;
  color: var(--nb-clay);
  text-decoration: none;
  transition: background 0.2s var(--nb-ease), border-color 0.2s var(--nb-ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  background: var(--nb-mist);
  border-left-color: var(--nb-orange);
}

.page-faq .faq-rail__num {
  font-family: var(--nb-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--nb-caramel);
}

.page-faq .faq-rail__foot {
  margin-top: 1.15rem;
  padding-top: 1rem;
  border-top: 2px solid var(--nb-line);
}

.page-faq .faq-rail__foot p {
  margin: 0 0 0.7rem;
  font-size: 14px;
  line-height: 1.6;
  color: var(--faq-ink-soft);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: var(--faq-sticky-top);
  margin-bottom: clamp(2.5rem, 6vw, 4.5rem);
}

.page-faq .faq-group:last-child {
  margin-bottom: 0;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  padding-bottom: 0.85rem;
  border-bottom: var(--nb-bw-bold) solid var(--nb-clay);
}

.page-faq .faq-group__head .nb-h2 {
  margin: 0;
}

.page-faq .faq-group__idx {
  font-family: var(--nb-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--nb-orange);
}

.page-faq .faq-group__lede {
  margin: 1rem 0 1.5rem;
  max-width: 62ch;
  color: var(--faq-ink-soft);
}

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

.page-faq .faq-group__lede a:hover {
  color: var(--nb-orange);
}

/* ---------- 图文 ---------- */
.page-faq .faq-photo {
  margin: 0 0 1.6rem;
  background: var(--nb-white);
  border: var(--nb-bw) solid var(--nb-clay);
  box-shadow: var(--nb-shadow-sm);
  overflow: hidden;
}

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

.page-faq .faq-photo figcaption {
  padding: 0.7rem 0.9rem;
  border-top: 2px solid var(--nb-line);
  font-family: var(--nb-sans);
  font-size: 13px;
  line-height: 1.6;
  color: var(--nb-caramel);
}

.page-faq .faq-photo--tall {
  margin: 0 0 1.6rem;
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-list {
  border-top: 1px solid var(--nb-line);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--nb-line);
  transition: background 0.2s var(--nb-ease), box-shadow 0.2s var(--nb-ease);
}

.page-faq .faq-item[open] {
  background: var(--nb-white);
  box-shadow: inset 4px 0 0 var(--nb-orange);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.4rem 0.7rem;
  padding: 1.05rem 0.85rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--nb-sans);
  font-size: 1.02rem;
  font-weight: 800;
  line-height: 1.55;
  color: var(--nb-clay);
}

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

.page-faq .faq-item__q::marker {
  content: "";
}

.page-faq .faq-item__q:hover {
  color: var(--nb-orange);
}

.page-faq .faq-item__no {
  flex: none;
  font-family: var(--nb-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--nb-caramel);
}

.page-faq .faq-item__text {
  flex: 1 1 12rem;
  min-width: 0;
}

.page-faq .faq-item__mark {
  flex: none;
  position: relative;
  width: 1.1rem;
  height: 1.1rem;
  margin-left: auto;
  align-self: center;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--nb-orange);
  border-radius: 2px;
}

.page-faq .faq-item__mark::before {
  top: calc(50% - 1.5px);
  left: 0;
  width: 100%;
  height: 3px;
}

.page-faq .faq-item__mark::after {
  left: calc(50% - 1.5px);
  top: 0;
  width: 3px;
  height: 100%;
  transition: transform 0.2s var(--nb-ease);
}

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

.page-faq .faq-item__a {
  padding: 0 0.9rem 1.3rem 0.9rem;
  font-size: 16px;
  line-height: 1.85;
  color: var(--faq-ink-soft);
}

.page-faq .faq-item__a p {
  margin: 0 0 0.6rem;
}

.page-faq .faq-item__a p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-item__a a {
  color: var(--nb-jade);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 状态标签 ---------- */
.page-faq .faq-tag {
  flex: none;
  align-self: center;
  padding: 0.1rem 0.5rem;
  border: 2px solid currentColor;
  border-radius: 999px;
  font-family: var(--nb-sans);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
  white-space: nowrap;
  line-height: 1.6;
}

.page-faq .faq-tag--rush {
  color: var(--nb-jade);
}

.page-faq .faq-tag--night {
  color: var(--nb-indigo);
}

/* ---------- 结尾联系块 ---------- */
.page-faq .faq-help {
  margin-top: clamp(2.25rem, 5vw, 3.5rem);
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  padding: clamp(1.5rem, 4vw, 2.75rem);
  background: var(--nb-mist);
  border: var(--nb-bw-bold) solid var(--nb-clay);
  box-shadow: var(--nb-shadow);
}

.page-faq .faq-help .nb-h2 {
  margin: 0 0 0.7rem;
}

.page-faq .faq-help__text p {
  margin: 0;
  max-width: 62ch;
  color: var(--nb-clay);
}

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

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}

.page-faq .faq-back {
  font-family: var(--nb-sans);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--nb-clay);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-faq .faq-back:hover {
  color: var(--nb-orange);
}

/* ---------- 响应式 ---------- */
@media (max-width: 959px) {
  .page-faq .faq-rail__list {
    grid-auto-flow: column;
    grid-auto-columns: max-content;
    overflow-x: auto;
    padding-bottom: 0.35rem;
    -webkit-overflow-scrolling: touch;
  }

  .page-faq .faq-rail__link {
    white-space: nowrap;
    border-left: 0;
    border-bottom: 4px solid transparent;
    padding: 0.5rem 0.7rem;
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    border-left-color: transparent;
    border-bottom-color: var(--nb-orange);
  }
}

@media (min-width: 960px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
  }

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

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

  .page-faq .faq-help__actions {
    justify-content: flex-end;
    max-width: 22rem;
  }
}

@media (min-width: 1100px) {
  .page-faq .faq-group--split .faq-split {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(230px, 300px);
    gap: clamp(1.25rem, 2.5vw, 2rem);
    align-items: start;
  }

  .page-faq .faq-group--split .faq-photo--tall {
    margin-bottom: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item__mark::after,
  .page-faq .faq-rail__link {
    transition: none;
  }
}