.page-faq {
  --faq-gap: clamp(1.4rem, 4vw, 3.5rem);
  --faq-accent: var(--orange);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  padding: 1.1rem 0 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.page-faq .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}
.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}
.page-faq .breadcrumb__sep {
  margin: 0 0.5em;
  color: var(--line-strong);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.75rem);
  padding: clamp(1.6rem, 4vw, 3rem) 0 clamp(1.8rem, 4vw, 2.6rem);
  border-bottom: 1px solid var(--line);
}
.page-faq .eyebrow {
  font-family: var(--font-cond);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--orange);
  margin: 0 0 0.9rem;
}
.page-faq .faq-hero h1 {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(1.75rem, 5.6vw, 3.1rem);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--paper);
  margin: 0 0 1rem;
  max-width: 22ch;
}
.page-faq .faq-hero__lead {
  font-size: 0.97rem;
  line-height: 1.8;
  color: var(--muted);
  margin: 0;
  max-width: 46ch;
}
.page-faq .faq-hero__quick {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.75rem;
}
.page-faq .faq-hero__quick li {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding-left: 0.75rem;
  border-left: 2px solid var(--line-strong);
}
.page-faq .faq-hero__quick .data-num {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--paper);
  font-variant-numeric: tabular-nums;
}
.page-faq .faq-hero__quick em {
  font-style: normal;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
}
.page-faq .faq-hero__media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--glass);
}
.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}
.page-faq .media__cap {
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
  padding: 0.6rem 0.85rem;
  border-top: 1px solid var(--line);
  background: rgba(22, 33, 28, 0.72);
}

/* ---------- 主分栏 ---------- */
.page-faq .faq-split {
  padding: clamp(1.8rem, 4vw, 3rem) 0 clamp(2.5rem, 6vw, 4.5rem);
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-index {
  margin-bottom: 2rem;
}
.page-faq .faq-index__title {
  font-family: var(--font-cond);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 0.75rem;
}
.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--line-strong);
}
.page-faq .faq-index__list a {
  display: block;
  padding: 0.5rem 0.5rem 0.5rem 1rem;
  margin-left: -1px;
  border-left: 2px solid transparent;
  font-size: 0.92rem;
  color: var(--muted);
  text-decoration: none;
  transition: color 160ms var(--ease), border-color 160ms var(--ease), background-color 160ms var(--ease);
}
.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--paper);
  border-left-color: var(--orange);
  background: rgba(255, 106, 26, 0.06);
}
.page-faq .faq-index__note {
  margin: 1rem 0 0;
  font-size: 12.5px;
  color: var(--muted);
}
.page-faq .faq-index__note a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(31, 182, 255, 0.35);
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}
.page-faq .faq-index__note a:hover,
.page-faq .faq-index__note a:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 1.5rem;
  padding-top: 0.5rem;
}
.page-faq .faq-group + .faq-group {
  margin-top: clamp(2rem, 5vw, 3.2rem);
}
.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: baseline;
  gap: 0.4rem 0.9rem;
}
.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}
.page-faq .faq-group__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.15rem, 3.4vw, 1.6rem);
  line-height: 1.35;
  color: var(--paper);
  margin: 0;
}
.page-faq .faq-group__count {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
  white-space: nowrap;
}
.page-faq .faq-group__bar {
  height: 3px;
  margin: 0.85rem 0 0;
  background: linear-gradient(90deg, var(--orange), var(--blue) 42%, transparent 88%);
  opacity: 0.8;
}

/* ---------- 问答折叠 ---------- */
.page-faq .faq-list {
  margin-top: 0.35rem;
}
.page-faq .qa {
  border-bottom: 1px solid var(--line);
}
.page-faq .qa > summary {
  position: relative;
  display: grid;
  grid-template-columns: 2.4rem 1fr 1.2rem;
  align-items: baseline;
  gap: 0.5rem;
  padding: 1.05rem 0 1.05rem 1.05rem;
  cursor: pointer;
  list-style: none;
  transition: background-color 160ms var(--ease);
}
.page-faq .qa > summary::-webkit-details-marker {
  display: none;
}
.page-faq .qa > summary::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55rem;
  bottom: 0.55rem;
  width: 2px;
  background: var(--orange);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform 180ms var(--ease);
}
.page-faq .qa[open] > summary::before {
  transform: scaleY(1);
}
.page-faq .qa > summary:hover {
  background: rgba(159, 176, 166, 0.05);
}
.page-faq .qa > summary:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}
.page-faq .qa__idx {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.page-faq .qa__q {
  font-size: 0.97rem;
  line-height: 1.6;
  font-weight: 500;
  color: var(--paper);
  transition: color 160ms var(--ease);
}
.page-faq .qa > summary:hover .qa__q,
.page-faq .qa[open] > summary .qa__q {
  color: var(--orange);
}
.page-faq .qa__mark {
  justify-self: end;
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 1;
  color: var(--muted);
}
.page-faq .qa__mark::after {
  content: "+";
}
.page-faq .qa[open] .qa__mark::after {
  content: "−";
  color: var(--orange);
}
.page-faq .qa__answer {
  padding: 0 1.5rem 1.25rem 3.45rem;
  max-width: 68ch;
}
.page-faq .qa__answer p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--muted);
}
.page-faq .qa__answer a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(31, 182, 255, 0.35);
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}
.page-faq .qa__answer a:hover,
.page-faq .qa__answer a:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* ---------- 中部通栏 ---------- */
.page-faq .faq-interlude {
  margin: clamp(2rem, 5vw, 3.4rem) 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--turf);
}
.page-faq .faq-interlude img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

/* ---------- 底部联系 ---------- */
.page-faq .faq-contact {
  margin-top: clamp(2rem, 5vw, 3.2rem);
  padding: clamp(1.4rem, 3.5vw, 2.2rem);
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  background: rgba(22, 33, 28, 0.66);
}
.page-faq .faq-contact__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.1rem, 3.2vw, 1.45rem);
  color: var(--paper);
  margin: 0 0 0.7rem;
}
.page-faq .faq-contact__lead {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--muted);
  max-width: 52ch;
}
.page-faq .faq-contact__list {
  list-style: none;
  margin: 1.4rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.1rem;
}
.page-faq .faq-contact__list .contact-list__row {
  display: grid;
  grid-template-columns: 5.5rem 1fr auto;
  align-items: center;
  gap: 0.7rem;
  padding: 0.7rem 0;
  border-top: 1px solid var(--line);
}
.page-faq .faq-contact__list .contact-list__k {
  font-family: var(--font-cond);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}
.page-faq .faq-contact__list .contact-list__v {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
}
.page-faq .faq-contact__list .contact-list__v a {
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}
.page-faq .faq-contact__list .contact-list__v a:hover,
.page-faq .faq-contact__list .contact-list__v a:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}
.page-faq .faq-contact__list .copy-btn {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  padding: 0.28rem 0.6rem;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  cursor: pointer;
  transition: color 160ms var(--ease), border-color 160ms var(--ease), background-color 160ms var(--ease);
}
.page-faq .faq-contact__list .copy-btn:hover,
.page-faq .faq-contact__list .copy-btn:focus-visible {
  color: var(--orange);
  border-color: var(--orange);
}
.page-faq .faq-contact__list .copy-btn[data-copied] {
  color: var(--ink);
  background: var(--mint);
  border-color: var(--mint);
}
.page-faq .faq-contact__note {
  margin: 1.2rem 0 0;
  padding-top: 0.9rem;
  border-top: 1px solid var(--line);
  font-size: 12px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 平板 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
  }
  .page-faq .faq-hero__media {
    align-self: stretch;
  }
  .page-faq .faq-hero__media img {
    height: 100%;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-faq .faq-split {
    display: grid;
    grid-template-columns: minmax(190px, 236px) minmax(0, 1fr);
    gap: var(--faq-gap);
    align-items: start;
  }
  .page-faq .faq-index {
    position: sticky;
    top: 2rem;
    margin-bottom: 0;
    padding-right: 0.5rem;
  }
  .page-faq .qa > summary {
    grid-template-columns: 2.8rem 1fr 1.2rem;
    padding-top: 1.15rem;
    padding-bottom: 1.15rem;
  }
  .page-faq .qa__answer {
    padding-left: 3.85rem;
    padding-bottom: 1.4rem;
  }
  .page-faq .faq-contact__list {
    max-width: 640px;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }
  .page-faq .faq-hero h1 {
    font-size: 3.25rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa > summary::before,
  .page-faq .qa > summary,
  .page-faq .qa__q,
  .page-faq .faq-index__list a {
    transition: none;
  }
}