.page-faq {
  --faq-line: rgba(74, 85, 104, 0.34);
  --faq-line-soft: rgba(74, 85, 104, 0.18);
  --faq-index-w: 296px;
  --faq-sticky: calc(var(--header-h) + 68px);
  display: block;
  background: var(--bg);
  color: var(--white);
  overflow-x: clip;
}

.page-faq img {
  max-width: 100%;
  height: auto;
}

/* ---------- 首屏框景 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-top: calc(var(--header-h) + clamp(30px, 6vw, 72px));
  padding-bottom: clamp(34px, 5vw, 68px);
  background:
    radial-gradient(90% 120% at 92% 0%, rgba(50, 245, 208, 0.13), transparent 60%),
    radial-gradient(70% 95% at 0% 100%, rgba(124, 92, 255, 0.13), transparent 62%),
    var(--bg);
  border-bottom: 1px solid var(--faq-line-soft);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(74, 85, 104, 0.14) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(74, 85, 104, 0.14) 1px, transparent 1px);
  background-size: 68px 68px;
  opacity: 0.7;
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 14, 39, 0) 40%, rgba(10, 14, 39, 0.82) 82%, var(--bg) 100%);
  pointer-events: none;
}

.page-faq .faq-hero > .shell {
  position: relative;
  z-index: 1;
}

.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray-text);
}

.page-faq .breadcrumb a {
  color: var(--gray-text);
  text-decoration: none;
  transition: color var(--dur) ease;
}

.page-faq .breadcrumb a:hover {
  color: var(--cyan);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 46px);
  margin-top: clamp(18px, 3vw, 30px);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(29px, 6vw, 52px);
  line-height: 1.07;
  letter-spacing: -0.012em;
  max-width: 14em;
}

.page-faq .lede {
  margin: 18px 0 0;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--gray-text);
}

.page-faq .faq-hero__meta {
  list-style: none;
  margin: clamp(24px, 4vw, 34px) 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--faq-line-soft);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 18px;
}

.page-faq .faq-hero__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(21px, 3.4vw, 29px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-faq .faq-hero__cap {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--gray-text);
}

.page-faq .faq-hero__frame {
  position: relative;
  padding: 14px;
  border: 1px solid var(--faq-line);
  background: linear-gradient(160deg, rgba(17, 22, 51, 0.92), rgba(10, 14, 39, 0.6));
}

.page-faq .faq-hero__frame::before,
.page-faq .faq-hero__frame::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border: 1px solid var(--cyan);
}

.page-faq .faq-hero__frame::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}

.page-faq .faq-hero__frame::after {
  right: -1px;
  bottom: -1px;
  border-top: 0;
  border-left: 0;
}

.page-faq .faq-hero__frame img {
  display: block;
  width: 100%;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.04);
}

/* ---------- 锚点分段导航 ---------- */
.page-faq .faq-anchors {
  position: sticky;
  top: var(--header-h);
  z-index: 6;
  background: rgba(10, 14, 39, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--faq-line-soft);
}

.page-faq .faq-anchors__inner {
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 52px;
}

.page-faq .faq-anchors__label {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gray-text);
}

.page-faq .faq-anchors ul {
  display: flex;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq .faq-anchors ul::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-anchors a {
  display: block;
  padding: 8px 12px;
  white-space: nowrap;
  font-size: 13px;
  color: var(--gray-text);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) ease, border-color var(--dur) ease;
}

.page-faq .faq-anchors a:hover,
.page-faq .faq-anchors a:focus-visible {
  color: var(--white);
  border-bottom-color: var(--cyan);
}

/* ---------- 双栏骨架 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 52px);
  padding-block: clamp(28px, 4vw, 56px) var(--pad-y);
}

.page-faq .faq-side {
  display: grid;
  gap: 22px;
  align-content: start;
  min-width: 0;
}

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

.page-faq .faq-side__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gray-text);
}

.page-faq .chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .chip {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  padding: 7px 11px;
  color: var(--gray-text);
  background: transparent;
  border: 1px solid var(--faq-line);
  border-radius: var(--rad);
  cursor: pointer;
  transition: color var(--dur) ease, background var(--dur) ease, border-color var(--dur) ease;
}

.page-faq .chip:hover {
  color: var(--white);
  border-color: var(--faq-line-strong, rgba(74, 85, 104, 0.7));
}

.page-faq .chip[aria-pressed="true"] {
  color: var(--bg);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-faq .chip:focus-visible {
  outline: 2px solid var(--azure);
  outline-offset: 2px;
}

.page-faq .faq-index {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--faq-line-soft);
}

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

.page-faq .faq-index a {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding: 10px 2px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--gray-text);
  text-decoration: none;
  transition: color var(--dur) ease, transform var(--dur) ease;
}

.page-faq .faq-index a:hover,
.page-faq .faq-index a:focus-visible {
  color: var(--cyan);
  transform: translateX(3px);
}

.page-faq .faq-index__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(139, 147, 167, 0.72);
}

.page-faq .faq-index a:hover .faq-index__no,
.page-faq .faq-index a:focus-visible .faq-index__no {
  color: var(--cyan);
}

/* ---------- 答案区 ---------- */
.page-faq .faq-answers {
  display: grid;
  gap: clamp(34px, 4.5vw, 56px);
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: var(--faq-sticky);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 12px;
  padding-bottom: 14px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-group__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(20px, 3vw, 27px);
  line-height: 1.25;
  letter-spacing: 0.01em;
}

.page-faq .faq-group__head p {
  grid-column: 2;
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--gray-text);
}

.page-faq .faq-flow {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 18px;
  padding: 0;
}

.page-faq .faq-flow li {
  position: relative;
  flex: 1 1 116px;
  padding: 11px 12px 11px 15px;
  border: 1px solid var(--faq-line-soft);
  background: var(--graphite);
  font-size: 13px;
  color: var(--white);
}

.page-faq .faq-flow li::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 2px;
  background: var(--cyan);
}

.page-faq .faq-flow__no {
  display: block;
  margin-bottom: 5px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--violet);
}

.page-faq .faq-items {
  display: grid;
  gap: 10px;
}

.page-faq .is-filtered-out {
  display: none;
}

.page-faq .faq-item {
  border: 1px solid var(--faq-line-soft);
  border-left: 2px solid transparent;
  background: linear-gradient(100deg, var(--panel), rgba(17, 22, 51, 0.42));
  transition: border-color var(--dur) ease, background var(--dur) ease;
  scroll-margin-top: var(--faq-sticky);
}

.page-faq .faq-item:hover {
  border-left-color: rgba(74, 85, 104, 0.72);
}

.page-faq .faq-detail > summary {
  list-style: none;
  cursor: pointer;
}

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

.page-faq .faq-q {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr) auto;
  gap: 12px;
  align-items: baseline;
  padding: 15px 16px;
  transition: background var(--dur) ease;
}

.page-faq .faq-q:hover {
  background: rgba(50, 245, 208, 0.045);
}

.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--azure);
  outline-offset: -2px;
}

.page-faq .faq-q__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--gray-text);
}

.page-faq .faq-q__text {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--white);
}

.page-faq .faq-q__toggle {
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-q__toggle::before {
  content: "+";
}

.page-faq .faq-detail[open] .faq-q__toggle::before {
  content: "\2212";
}

.page-faq .faq-detail[open] {
  border-left-color: var(--cyan);
}

.page-faq .faq-detail[open] .faq-a {
  animation: faq-reveal var(--dur) ease both;
}

@keyframes faq-reveal {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-faq .faq-a {
  margin: 0 16px;
  padding: 15px 0 20px;
  border-top: 1px dashed var(--faq-line-soft);
  font-size: 14px;
  line-height: 1.85;
  color: var(--gray-text);
}

.page-faq .faq-a p {
  margin: 0 0 12px;
}

.page-faq .faq-a p:last-of-type {
  margin-bottom: 0;
}

.page-faq .faq-a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(50, 245, 208, 0.35);
  transition: border-color var(--dur) ease;
}

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

.page-faq .faq-a__meta {
  display: block;
  margin-top: 14px;
  padding-top: 10px;
  border-top: 1px solid rgba(74, 85, 104, 0.14);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.7;
  letter-spacing: 0.06em;
  color: rgba(139, 147, 167, 0.78);
}

.page-faq .faq-contact {
  margin: 16px 0 14px;
  border: 1px solid var(--faq-line-soft);
  background: rgba(28, 35, 51, 0.55);
}

.page-faq .faq-contact__row {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 12px;
  padding: 11px 14px;
  border-bottom: 1px solid var(--faq-line-soft);
}

.page-faq .faq-contact__row:last-child {
  border-bottom: 0;
}

.page-faq .faq-contact dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--gray-text);
}

.page-faq .faq-contact dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--white);
  word-break: break-word;
}

/* ---------- 交叉核对图 ---------- */
.page-faq .faq-cross {
  margin: 0 0 20px;
  padding: 14px;
  border: 1px solid var(--faq-line-soft);
  background: var(--panel);
}

.page-faq .faq-cross img {
  display: block;
  width: 100%;
  border: 1px solid var(--faq-line-soft);
  object-fit: cover;
}

.page-faq .faq-cross figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.7;
  letter-spacing: 0.05em;
  color: var(--gray-text);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-hero__meta {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-a {
    margin: 0 20px;
  }

  .page-faq .faq-q {
    padding: 16px 20px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: end;
  }
}

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

  .page-faq .faq-side {
    position: sticky;
    top: var(--faq-sticky);
    max-height: calc(100vh - var(--header-h) - 92px);
    overflow-y: auto;
    scrollbar-width: thin;
    padding-right: 6px;
  }
}

@media (min-width: 1180px) {
  .page-faq {
    --faq-index-w: 320px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-detail[open] .faq-a {
    animation: none;
  }

  .page-faq .faq-index a,
  .page-faq .chip,
  .page-faq .faq-q {
    transition: none;
  }
}

.page-faq {
  --faq-line-strong: currentColor;
}