.page-faq {
  --faq-aside-w: 268px;
  --faq-gap: clamp(1.5rem, 3vw, 3.25rem);
  display: block;
}

/* 面包屑间距 */
.page-faq .breadcrumb {
  padding-block: 1rem 0.5rem;
}

/* ── 首屏 ───────────────────────────── */
.page-faq .faq-hero {
  padding-block: clamp(1.5rem, 4vw, 2.75rem) clamp(2rem, 5vw, 3.5rem);
  border-bottom: 1px solid var(--line-soft);
  background:
    radial-gradient(120% 88% at 90% 0%, rgba(106, 76, 255, 0.18), transparent 62%),
    radial-gradient(85% 70% at 2% 12%, rgba(43, 232, 176, 0.09), transparent 60%);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 2rem;
}

.page-faq h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 5.4vw, 3.5rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--c-frost);
  margin: 0.6rem 0 1rem;
  max-width: 24ch;
}

.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 38ch;
  color: var(--c-body);
  font-size: clamp(1rem, 1.6vw, 1.0625rem);
  line-height: 1.78;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.page-faq .faq-hero__panel {
  padding: 1.1rem 1.1rem 1.25rem;
  border: 1px solid var(--line-ice);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(18, 46, 69, 0.94), rgba(11, 27, 43, 0.92));
}

.page-faq .faq-hero__panel .eyebrow {
  margin: 0;
}

/* 版本刻度尺 */
.page-faq .version-ruler {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.85rem;
  padding-bottom: 0.4rem;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .version-tick {
  flex: 0 0 auto;
  display: grid;
  gap: 0.2rem;
  min-width: 78px;
  padding: 0.5rem 0.6rem;
  border: 1px solid var(--line-ice);
  border-radius: var(--radius);
  background: rgba(11, 27, 43, 0.6);
  transition: border-color var(--t) var(--ease), background var(--t) var(--ease);
}

.page-faq .version-tick[data-active] {
  border-color: var(--c-neon);
  background: rgba(43, 232, 176, 0.1);
}

.page-faq .tick-num {
  font-family: var(--font-num);
  font-size: 0.9375rem;
  letter-spacing: 0.08em;
  color: var(--c-frost);
}

.page-faq .version-tick[data-active] .tick-num {
  color: var(--c-neon);
}

.page-faq .tick-label {
  font-size: 0.6875rem;
  letter-spacing: 0.05em;
  color: var(--c-grit);
}

.page-faq .update-bar {
  margin: 0.9rem 0 0;
}

/* ── 分组索引 ───────────────────────── */
.page-faq .faq-index {
  padding-block: 1.25rem 1.4rem;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
  grid-template-columns: repeat(auto-fit, minmax(168px, 1fr));
}

.page-faq .faq-index__list a {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  color: var(--c-body);
  font-size: 0.9375rem;
  text-decoration: none;
  transition: border-color var(--t) var(--ease), background var(--t) var(--ease), color var(--t) var(--ease);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  border-color: var(--c-neon);
  background: rgba(43, 232, 176, 0.08);
  color: var(--c-frost);
}

.page-faq .faq-index__num {
  font-family: var(--font-num);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--c-violet);
}

/* ── 主体双栏 ───────────────────────── */
.page-faq .faq-body {
  display: grid;
  gap: 2.5rem;
  padding-block: clamp(1.75rem, 4vw, 3rem) 0;
}

/* ── 章节与问答 ─────────────────────── */
.page-faq .section {
  padding-top: 1.25rem;
  margin-bottom: 2.75rem;
}

.page-faq .section-head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding-bottom: 0.85rem;
}

.page-faq .section-num {
  font-family: var(--font-num);
  font-size: 1rem;
  letter-spacing: 0.08em;
  color: var(--c-violet);
}

.page-faq .section-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.25rem, 2.6vw, 1.75rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--c-frost);
}

.page-faq .section-meta {
  margin-left: auto;
  font-family: var(--font-num);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--c-grit);
}

.page-faq .faq-note {
  margin: 0 0 1.25rem;
  max-width: 38ch;
  color: var(--c-body);
  line-height: 1.78;
}

.page-faq .faq-figure {
  margin: 0 0 1.5rem;
}

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

.page-faq .faq-figure figcaption {
  margin-top: 0.5rem;
  font-size: 0.75rem;
  line-height: 1.7;
  color: var(--c-grit);
}

.page-faq .qa {
  padding-inline: 0.85rem;
  border-top: 1px solid var(--line-soft);
  transition: background var(--t) var(--ease), box-shadow var(--t) var(--ease);
}

.page-faq .qa:last-of-type {
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .qa[open],
.page-faq .qa:target {
  background: rgba(18, 46, 69, 0.4);
  box-shadow: inset 2px 0 0 var(--c-neon);
}

.page-faq .qa:target {
  background: rgba(43, 232, 176, 0.07);
}

.page-faq .qa__q {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  padding: 0.95rem 0;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa__idx {
  flex: 0 0 auto;
  font-family: var(--font-num);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--c-ice);
}

.page-faq .qa__t {
  flex: 1 1 auto;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--c-frost);
}

.page-faq .qa__sign {
  position: relative;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  align-self: center;
}

.page-faq .qa__sign::before,
.page-faq .qa__sign::after {
  content: "";
  position: absolute;
  background: var(--c-ice);
  transition: background var(--t) var(--ease), opacity var(--t) var(--ease);
}

.page-faq .qa__sign::before {
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
}

.page-faq .qa__sign::after {
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
}

.page-faq .qa[open] .qa__sign::before {
  background: var(--c-neon);
}

.page-faq .qa[open] .qa__sign::after {
  opacity: 0;
}

.page-faq .qa__a {
  padding: 0 0 1.15rem;
  animation: faqAnsIn var(--t-slow) var(--ease);
}

.page-faq .qa__a p {
  margin: 0 0 0.7rem;
  max-width: 38ch;
  color: var(--c-body);
  line-height: 1.78;
}

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

.page-faq .qa__a ul {
  margin: 0 0 0.7rem;
  padding-left: 1.15rem;
  color: var(--c-body);
}

.page-faq .qa__a li {
  margin-bottom: 0.35rem;
  line-height: 1.75;
}

.page-faq .qa__a li::marker {
  color: var(--c-neon);
}

.page-faq .qa__steps {
  list-style: none;
  margin: 0 0 0.7rem;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.page-faq .qa__steps li {
  display: flex;
  gap: 0.65rem;
  margin: 0;
  color: var(--c-body);
  line-height: 1.72;
}

.page-faq .qa__steps span {
  flex: 0 0 auto;
  font-family: var(--font-num);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--c-neon);
  padding-top: 0.2rem;
}

@keyframes faqAnsIn {
  from {
    opacity: 0;
    transform: translateY(-3px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* 联系行 */
.page-faq .contact-list {
  list-style: none;
  margin: 0 0 0.8rem;
  padding: 0;
  display: grid;
  gap: 0.55rem;
}

.page-faq .contact-list li {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem 0.75rem;
  margin: 0;
  padding-bottom: 0.55rem;
  border-bottom: 1px dashed var(--line-soft);
}

.page-faq .contact-key {
  flex: 0 0 auto;
  min-width: 4.5rem;
  font-size: 0.8125rem;
  color: var(--c-grit);
}

.page-faq .contact-val {
  font-family: var(--font-num);
  font-size: 0.875rem;
  letter-spacing: 0.04em;
  color: var(--c-frost);
  word-break: break-all;
}

/* ── 右侧对照窄窗 ───────────────────── */
.page-faq .faq-aside__card {
  padding: 1.1rem 1rem 1.25rem;
  border: 1px solid var(--line-ice);
  border-top: 3px solid var(--c-violet);
  border-radius: var(--radius);
  background: rgba(18, 46, 69, 0.62);
}

.page-faq .faq-aside__card .eyebrow {
  margin: 0;
}

.page-faq .faq-aside__title {
  margin: 0.5rem 0 0.9rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.0625rem;
  line-height: 1.4;
  color: var(--c-frost);
}

.page-faq .faq-aside__steps {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.page-faq .faq-aside__steps li {
  display: flex;
  gap: 0.55rem;
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--c-body);
}

.page-faq .faq-aside__steps span {
  flex: 0 0 auto;
  font-family: var(--font-num);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--c-neon);
  padding-top: 0.15rem;
}

.page-faq .faq-aside__note {
  margin: 0 0 1rem;
  padding-top: 0.85rem;
  border-top: 1px dashed var(--line-soft);
  font-size: 0.8125rem;
  line-height: 1.72;
  color: var(--c-grit);
}

.page-faq .faq-aside__card .btn {
  width: 100%;
  justify-content: center;
  text-align: center;
}

/* ── 收尾 ───────────────────────────── */
.page-faq .faq-tail {
  padding-block: clamp(2.25rem, 5vw, 3.5rem) clamp(2.5rem, 6vw, 4.5rem);
}

.page-faq .cta-strip {
  display: grid;
  gap: 1.25rem;
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 1px solid var(--line-ice);
  border-left: 3px solid var(--c-orange);
  border-radius: var(--radius);
  background: linear-gradient(120deg, rgba(18, 46, 69, 0.95), rgba(11, 27, 43, 0.92));
}

.page-faq .faq-tail__title {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--c-frost);
}

.page-faq .faq-tail__copy p {
  margin: 0;
  max-width: 38ch;
  color: var(--c-body);
  line-height: 1.75;
}

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

/* ── 响应式 ─────────────────────────── */
@media (min-width: 720px) {
  .page-faq .qa__a {
    padding-left: 2.35rem;
  }

  .page-faq .faq-figure figcaption {
    font-size: 0.8125rem;
  }
}

@media (min-width: 860px) {
  .page-faq .cta-strip {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 2rem;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.85fr);
    gap: var(--faq-gap);
    align-items: start;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-body {
    grid-template-columns: minmax(0, 1fr) var(--faq-aside-w);
    gap: var(--faq-gap);
    align-items: start;
  }

  .page-faq .faq-aside__card {
    position: sticky;
    top: calc(var(--header-h-sm) + 1.25rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__a {
    animation: none;
  }

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