.page-faq {
  --faq-gap: clamp(20px, 3.2vw, 44px);
  --faq-top: clamp(16px, 2.4vw, 28px);
  background: var(--c-ink);
  color: var(--text);
  overflow-x: clip;
}

.page-faq .faq-wrap {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 首屏拼贴 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(10px, 1.6vw, 20px) 0 clamp(32px, 4.6vw, 62px);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(255, 90, 31, 0.16), transparent 58%),
    linear-gradient(180deg, var(--c-ink-2) 0%, var(--c-ink) 78%);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 38%;
  height: 3px;
  background: linear-gradient(90deg, var(--c-cyan), rgba(45, 226, 230, 0));
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: end;
}

.page-faq .faq-hero__intro .eyebrow {
  margin: 0 0 14px;
  color: var(--c-gold);
}

.page-faq .faq-h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.9rem, 5.4vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: 0.035em;
  color: var(--c-paper);
}

.page-faq .faq-h1 em {
  display: block;
  font-style: normal;
  color: var(--c-cyan);
  margin-top: 6px;
}

.page-faq .faq-lede {
  margin: 0;
  max-width: 48ch;
  color: var(--text-dim);
  font-size: clamp(0.95rem, 1.05vw, 1.05rem);
  line-height: 1.82;
}

.page-faq .faq-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-hero__media {
  position: relative;
  margin: 0;
  border: 1px solid var(--line-strong);
  background: var(--c-black);
}

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

.page-faq .faq-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, rgba(45, 226, 230, 0.2) 0 14%, transparent 40%);
  pointer-events: none;
}

.page-faq .faq-hero__tag {
  position: absolute;
  left: 14px;
  bottom: 14px;
  z-index: 1;
  background: var(--c-gold);
  color: var(--c-ink);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  padding: 5px 11px;
  box-shadow: 3px 3px 0 var(--c-black);
}

/* ---------- 左侧索引 + 右侧问答 ---------- */
.page-faq .faq-shell {
  display: grid;
  gap: var(--faq-gap);
  padding-block: clamp(28px, 4vw, 56px) clamp(44px, 6vw, 88px);
}

.page-faq .faq-rail {
  border-top: 2px solid var(--c-cyan);
  padding-top: 14px;
}

.page-faq .faq-rail__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--c-gold);
}

.page-faq .faq-toc {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-faq .faq-toc__link {
  display: grid;
  grid-template-columns: 2.1em minmax(0, 1fr);
  align-items: baseline;
  gap: 8px;
  padding: 8px 10px;
  border-left: 2px solid var(--line);
  color: var(--text-dim);
  font-size: 0.875rem;
  line-height: 1.4;
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible,
.page-faq .faq-toc__link.is-active {
  color: var(--c-paper);
  border-left-color: var(--c-cyan);
  background: rgba(45, 226, 230, 0.08);
}

.page-faq .faq-toc__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--c-gold);
  letter-spacing: 0.06em;
}

/* ---------- 分类区块 ---------- */
.page-faq .faq-body {
  min-width: 0;
}

.page-faq .faq-block {
  padding-top: clamp(20px, 3vw, 32px);
}

.page-faq .faq-block + .faq-block {
  margin-top: clamp(26px, 4vw, 52px);
  border-top: 1px solid var(--line);
}

.page-faq .faq-block__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  margin-bottom: 14px;
}

.page-faq .faq-block__num {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3.2vw, 2.1rem);
  line-height: 1;
  color: var(--c-gold);
  opacity: 0.6;
  letter-spacing: -0.02em;
}

.page-faq .faq-block__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.1rem, 2vw, 1.45rem);
  letter-spacing: 0.02em;
  color: var(--c-paper);
}

.page-faq .faq-block__head .tag {
  margin-left: auto;
}

.page-faq .faq-figure {
  margin: 0 0 10px;
  border: 1px solid var(--line);
  background: var(--c-black);
}

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

.page-faq .faq-figure__cap {
  padding: 9px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--c-haze);
  border-top: 1px solid var(--line);
}

/* ---------- 问答手风琴 ---------- */
.page-faq .faq-q {
  border-bottom: 1px solid var(--line);
  border-left: 2px solid transparent;
  padding-left: clamp(10px, 1.8vw, 16px);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-q[open] {
  border-left-color: var(--c-cyan);
  background: linear-gradient(90deg, rgba(45, 226, 230, 0.08), rgba(45, 226, 230, 0) 62%);
}

.page-faq .faq-q > summary {
  display: grid;
  grid-template-columns: 2.7em minmax(0, 1fr) 16px;
  align-items: center;
  gap: 10px;
  padding: 16px 4px 16px 0;
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  line-height: 1.55;
  color: var(--c-paper);
  transition: color var(--dur) var(--ease);
}

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

.page-faq .faq-q > summary::marker {
  content: "";
}

.page-faq .faq-q > summary:hover,
.page-faq .faq-q > summary:focus-visible,
.page-faq .faq-q[open] > summary {
  color: var(--c-cyan);
}

.page-faq .faq-q__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--c-gold);
}

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

.page-faq .faq-q__sign {
  position: relative;
  width: 15px;
  height: 15px;
  border: 1px solid var(--line-strong);
  justify-self: end;
}

.page-faq .faq-q__sign::before,
.page-faq .faq-q__sign::after {
  content: "";
  position: absolute;
  background: var(--c-gold);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-faq .faq-q__sign::before {
  left: 3px;
  right: 3px;
  top: 50%;
  height: 1.5px;
  transform: translateY(-50%);
}

.page-faq .faq-q__sign::after {
  top: 3px;
  bottom: 3px;
  left: 50%;
  width: 1.5px;
  transform: translateX(-50%);
}

.page-faq .faq-q[open] .faq-q__sign {
  border-color: var(--c-cyan);
}

.page-faq .faq-q[open] .faq-q__sign::before {
  background: var(--c-cyan);
}

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

.page-faq .faq-q__body {
  padding: 0 0 18px;
  color: var(--text-dim);
  font-size: 0.94rem;
  line-height: 1.8;
}

.page-faq .faq-q__body p {
  margin: 0 0 12px;
  max-width: 64ch;
}

.page-faq .faq-q__next {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--c-cyan);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid rgba(45, 226, 230, 0.45);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-q__next:hover,
.page-faq .faq-q__next:focus-visible {
  color: var(--c-orange);
  border-bottom-color: var(--c-orange);
}

/* ---------- 联系灯箱 ---------- */
.page-faq .faq-contact {
  position: relative;
  margin-top: clamp(22px, 3vw, 34px);
  padding: clamp(20px, 3vw, 32px);
  display: grid;
  gap: 18px;
  border: 1px solid var(--line-strong);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(255, 90, 31, 0.2), transparent 60%),
    linear-gradient(150deg, var(--c-ink-2), var(--c-ink));
}

.page-faq .faq-contact::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 108px;
  height: 3px;
  background: linear-gradient(90deg, var(--c-orange), var(--c-gold));
}

.page-faq .faq-contact__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  letter-spacing: 0.02em;
  color: var(--c-paper);
}

.page-faq .faq-contact__note {
  margin: 0;
  max-width: 52ch;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-faq .faq-contact__rows {
  display: grid;
  gap: 10px;
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.page-faq .faq-contact__row {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  font-size: 0.94rem;
}

.page-faq .faq-contact__key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--c-gold);
}

.page-faq .faq-contact__val {
  color: var(--c-paper);
  word-break: break-word;
  line-height: 1.6;
}

.page-faq .faq-contact__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-contact {
    grid-template-columns: minmax(0, 1fr);
  }

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

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  }
}

@media (min-width: 960px) {
  .page-faq .faq-shell {
    grid-template-columns: 232px minmax(0, 1fr);
    align-items: start;
    column-gap: clamp(28px, 3.4vw, 56px);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 92px;
  }

  .page-faq .faq-toc {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 4px;
  }

  .page-faq .faq-toc__link {
    padding: 9px 10px;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-contact {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
    gap: 28px;
  }

  .page-faq .faq-contact__rows {
    grid-template-columns: minmax(0, 1fr);
    border-top: 0;
    padding-top: 0;
    border-left: 1px solid var(--line);
    padding-left: 24px;
  }

  .page-faq .faq-contact__acts {
    grid-column: 1 / -1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-toc__link,
  .page-faq .faq-q,
  .page-faq .faq-q > summary,
  .page-faq .faq-q__sign::before,
  .page-faq .faq-q__sign::after,
  .page-faq .faq-q__next {
    transition: none;
  }
}