.page-faq {
  --faq-toc-w: 236px;
  --faq-gap: clamp(28px, 4vw, 56px);
  color: var(--text);
  font-family: var(--font-body);
  background: var(--ink-900);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 90% at 88% 8%, rgba(63, 224, 208, 0.07), transparent 62%),
    linear-gradient(180deg, var(--ink-800) 0%, var(--ink-900) 100%);
}

.page-faq .faq-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  padding-top: clamp(26px, 5vw, 64px);
  padding-bottom: clamp(34px, 6vw, 76px);
  align-items: center;
}

.page-faq .faq-hero__narrative {
  min-width: 0;
}

.page-faq .faq-hero .breadcrumbs {
  margin-bottom: 18px;
}

.page-faq .faq-hero .eyebrow {
  display: block;
  margin-bottom: 14px;
  color: var(--gold);
}

.page-faq .faq-hero h1 {
  margin: 0;
  font-family: var(--font-title);
  font-size: clamp(1.95rem, 5.2vw, 3.3rem);
  line-height: 1.16;
  font-weight: 700;
  letter-spacing: 0;
  overflow-wrap: break-word;
}

.page-faq .faq-hero__accent {
  color: var(--gold-hi);
  border-bottom: 2px solid rgba(201, 162, 39, 0.55);
  padding-bottom: 2px;
}

.page-faq .faq-hero__lede {
  margin: 20px 0 0;
  max-width: 46ch;
  font-size: clamp(0.97rem, 1.1vw, 1.06rem);
  line-height: 1.95;
  color: var(--text);
}

.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  margin: 26px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.page-faq .faq-hero__facts li {
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--muted);
}

.page-faq .faq-hero__facts .num {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--gold-hi);
  margin-right: 0.4em;
}

.page-faq .faq-hero__figure {
  margin: 0;
  min-width: 0;
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  object-fit: cover;
  filter: saturate(0.82) contrast(1.02);
}

.page-faq .faq-hero__figure::after {
  content: "";
  display: block;
  height: 7px;
  margin-top: 12px;
  background: repeating-linear-gradient(90deg, var(--cyan) 0 2px, transparent 2px 24px);
  opacity: 0.45;
}

.page-faq .faq-hero__figure .figure__caption {
  margin-top: 12px;
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 文档区 ---------- */
.page-faq .faq-doc {
  padding-top: clamp(44px, 7vw, 92px);
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-faq .faq-doc__head {
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-faq .faq-doc__head h2 {
  margin: 10px 0 0;
  font-family: var(--font-title);
  font-size: clamp(1.35rem, 2.4vw, 2rem);
  line-height: 1.3;
}

.page-faq .faq-doc__note {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--muted);
}

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

/* ---------- 锚点导航 ---------- */
.page-faq .faq-toc {
  min-width: 0;
  border-bottom: 1px solid var(--line);
  padding-bottom: 14px;
}

.page-faq .faq-toc__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--muted);
}

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

.page-faq .faq-toc__link {
  display: block;
  padding: 8px 14px;
  border-left: 2px solid transparent;
  border-radius: var(--radius);
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  transition: color 200ms var(--ease), border-color 200ms var(--ease), background-color 200ms var(--ease);
}

.page-faq .faq-toc__num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--gold);
  margin-right: 0.6em;
}

.page-faq .faq-toc__link:hover {
  color: var(--text);
  background: var(--ink-800);
}

.page-faq .faq-toc__link[aria-current="location"] {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: var(--ink-800);
}

.page-faq .faq-toc__link[aria-current="location"] .faq-toc__num {
  color: var(--cyan);
}

/* ---------- 分组 ---------- */
.page-faq .faq-body {
  min-width: 0;
}

.page-faq .faq-group {
  min-width: 0;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(40px, 5vw, 68px);
  padding-top: clamp(32px, 4vw, 52px);
  border-top: 1px solid rgba(201, 162, 39, 0.38);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 14px;
  align-items: baseline;
}

.page-faq .faq-group__index {
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 1;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.page-faq .faq-group__head h3 {
  margin: 0;
  font-family: var(--font-title);
  font-size: clamp(1.15rem, 2vw, 1.5rem);
  line-height: 1.35;
  font-weight: 600;
}

.page-faq .faq-group__note {
  grid-column: 2;
  margin: 10px 0 20px;
  font-size: 0.86rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-figure {
  margin: 0 0 22px;
  min-width: 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  object-fit: cover;
}

.page-faq .faq-figure .figure__caption {
  margin-top: 10px;
  font-size: 0.76rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 折叠问答 ---------- */
.page-faq .fold {
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .fold > summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  position: relative;
  padding: 17px 38px 17px 0;
  cursor: pointer;
  list-style: none;
  transition: color 200ms var(--ease);
}

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

.page-faq .fold > summary::after {
  content: "+";
  position: absolute;
  right: 6px;
  top: 16px;
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .fold[open] > summary::after {
  content: "-";
}

.page-faq .fold > summary:hover .faq-q {
  color: var(--gold-hi);
}

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

.page-faq .faq-id {
  flex: 0 0 auto;
  padding-top: 0.28em;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-faq .faq-q {
  min-width: 0;
  font-size: 1.01rem;
  font-weight: 600;
  line-height: 1.65;
  color: var(--text);
  overflow-wrap: break-word;
  transition: color 200ms var(--ease);
}

.page-faq .fold__body {
  padding: 0 14px 22px 0;
  font-size: 0.94rem;
  line-height: 1.95;
  color: var(--muted);
  overflow-wrap: break-word;
}

.page-faq .fold__body p {
  margin: 0 0 12px;
  max-width: 68ch;
}

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

.page-faq .fold__body .mono {
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.9em;
}

.page-faq .fold__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 224, 208, 0.35);
}

.page-faq .fold__body a:hover {
  border-bottom-color: var(--cyan);
}

.page-faq .fold__body a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ---------- 底部横向带 ---------- */
.page-faq .faq-more {
  background: var(--ink-800);
  border-top: 1px solid var(--line);
  padding: clamp(38px, 5vw, 68px) 0 clamp(42px, 6vw, 78px);
}

.page-faq .faq-more h2 {
  margin: 0 0 22px;
  font-family: var(--font-title);
  font-size: clamp(1.15rem, 2vw, 1.55rem);
  line-height: 1.35;
}

.page-faq .faq-more__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}

.page-faq .faq-more__list li {
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-more__list a {
  display: block;
  padding: 15px 4px 15px 14px;
  border-left: 2px solid rgba(201, 162, 39, 0.5);
  color: var(--text);
  font-size: 0.94rem;
  line-height: 1.7;
  text-decoration: none;
  transition: color 200ms var(--ease), border-color 200ms var(--ease), background-color 200ms var(--ease);
}

.page-faq .faq-more__list a:hover {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: var(--ink-700);
}

.page-faq .faq-more__list a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: clamp(36px, 5vw, 84px);
  }

  .page-faq .faq-layout {
    grid-template-columns: var(--faq-toc-w) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 76px);
  }

  .page-faq .faq-toc {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
    border-bottom: 0;
    border-left: 1px solid var(--line);
    padding: 4px 0 4px 14px;
    max-height: calc(100vh - var(--header-h) - 56px);
  }

  .page-faq .faq-toc__list {
    display: grid;
    gap: 2px;
    overflow: visible;
  }

  .page-faq .faq-toc__link {
    padding: 9px 12px;
  }

  .page-faq .fold__body {
    padding-right: 48px;
  }

  .page-faq .faq-more__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(24px, 4vw, 56px);
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-hero__lede {
    font-size: 1.06rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-toc__link,
  .page-faq .faq-q,
  .page-faq .faq-more__list a {
    transition: none;
  }
}
</main>