.page-faq {
  --faq-rail-w: 272px;
  --faq-gap: 20px;
  position: relative;
  padding-bottom: 56px;
  background:
    radial-gradient(900px 420px at 10% -8%, rgba(124, 255, 203, .07), transparent 66%),
    radial-gradient(760px 400px at 94% 2%, rgba(139, 92, 246, .09), transparent 70%);
}

.page-faq .breadcrumb {
  padding-top: 18px;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  padding-top: 24px;
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

.page-faq .faq-hero__overline {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--neon);
}

.page-faq .faq-hero h1 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 7vw, 56px);
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--ice);
  max-width: 22ch;
}

.page-faq .faq-hero__lead {
  margin: 0 0 20px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ice-dim);
}

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

.page-faq .faq-hero__panel {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .faq-hero__panel .stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 14px 16px;
  background: var(--ink-1);
  min-width: 0;
}

.page-faq .faq-hero__panel .stat__value {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 22px;
  line-height: 1.1;
  color: var(--neon);
  letter-spacing: -.01em;
}

.page-faq .stat__unit {
  font-size: 12px;
  margin-left: 2px;
  color: var(--ice-dim);
}

.page-faq .faq-hero__panel .stat__label {
  font-size: 12px;
  line-height: 1.5;
  color: var(--steel);
}

/* ---------- 主体两栏 ---------- */

.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  margin-top: 40px;
  align-items: start;
}

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

.page-faq .faq-rail__sticky {
  display: grid;
  gap: 16px;
  min-width: 0;
}

.page-faq .faq-rail__title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--violet-soft);
}

.page-faq .faq-rail__filters {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-rail__filters .filter-button {
  flex: 0 0 auto;
  padding: 7px 13px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: transparent;
  color: var(--steel);
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1;
  cursor: pointer;
  transition: color .2s ease, border-color .2s ease, background-color .2s ease;
}

.page-faq .faq-rail__filters .filter-button:hover {
  border-color: var(--violet);
  color: var(--ice);
}

.page-faq .faq-rail__filters .filter-button.is-active {
  border-color: var(--neon);
  background: rgba(124, 255, 203, .12);
  color: var(--neon);
}

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

.page-faq .faq-rail__index a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 8px 8px 0;
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--steel);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s ease, border-color .2s ease, padding-left .2s ease;
}

.page-faq .faq-rail__index a b {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--violet-soft);
}

.page-faq .faq-rail__index a:hover {
  color: var(--neon);
  border-bottom-color: var(--line-neon);
  padding-left: 6px;
}

.page-faq .faq-rail__count {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--steel);
}

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

.page-faq .filter-empty {
  margin: 0 0 16px;
  padding: 12px 14px;
  border-left: 2px solid var(--magenta);
  background: rgba(255, 92, 122, .08);
  font-size: 13.5px;
  color: var(--ice-dim);
}

/* ---------- 分类区块 ---------- */

.page-faq .faq-block {
  margin-bottom: 40px;
  min-width: 0;
}

.page-faq .faq-block--filterable:not(:has([data-filter-item]:not(.is-filtered-out))) {
  display: none;
}

.page-faq .faq-block__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 0 10px;
  border-top: 1px solid var(--line-strong);
}

.page-faq .faq-block__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--neon-deep);
}

.page-faq .faq-block__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 4.6vw, 28px);
  line-height: 1.25;
  letter-spacing: -.01em;
  color: var(--ice);
}

.page-faq .faq-block__lead {
  margin: 0 0 16px;
  max-width: 68ch;
  font-size: 14px;
  line-height: 1.72;
  color: var(--steel);
}

.page-faq .faq-figure {
  margin: 0 0 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-1);
}

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

.page-faq .faq-figure .media-frame__caption {
  padding: 10px 12px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--steel);
  border-top: 1px solid var(--line);
}

/* ---------- 问题卡片 ---------- */

.page-faq .qa {
  margin: 0 0 8px;
  border: 1px solid var(--line);
  border-left: 2px solid transparent;
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(19, 28, 46, .88), rgba(10, 16, 28, .88));
  transition: border-color .2s ease, box-shadow .2s ease;
}

.page-faq .qa:hover {
  border-color: var(--line-strong);
  border-left-color: var(--violet);
}

.page-faq .qa[open] {
  border-left-color: var(--neon);
  box-shadow: var(--shadow-layer);
}

.page-faq .qa__summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 13px 14px;
  cursor: pointer;
  list-style: none;
  font-size: 14.5px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--ice);
}

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

.page-faq .qa__summary::marker {
  content: "";
}

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

.page-faq .qa__index {
  flex: 0 0 auto;
  padding-top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--violet-soft);
}

.page-faq .qa[open] .qa__index {
  color: var(--neon);
}

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

.page-faq .qa__marker {
  position: relative;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  margin-top: 5px;
  margin-left: auto;
}

.page-faq .qa__marker::before,
.page-faq .qa__marker::after {
  content: "";
  position: absolute;
  background: var(--steel);
  transition: transform .22s ease, background-color .22s ease;
}

.page-faq .qa__marker::before {
  top: 6px;
  left: 0;
  width: 14px;
  height: 2px;
}

.page-faq .qa__marker::after {
  top: 0;
  left: 6px;
  width: 2px;
  height: 14px;
}

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

.page-faq .qa[open] .qa__marker::after {
  transform: scaleY(0);
}

.page-faq .qa__body {
  padding: 0 14px 16px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--ice-dim);
}

.page-faq .qa__cond {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 12px;
  padding: 8px 12px;
  border-left: 2px solid var(--violet);
  background: rgba(139, 92, 246, .1);
  color: var(--ice);
  font-size: 13.5px;
  line-height: 1.65;
}

.page-faq .qa__cond-label {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--violet-soft);
}

.page-faq .qa__steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: qa-step;
  display: grid;
  gap: 9px;
}

.page-faq .qa__steps li {
  position: relative;
  padding-left: 32px;
  counter-increment: qa-step;
}

.page-faq .qa__steps li::before {
  content: counter(qa-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--neon-deep);
}

/* ---------- 收尾区块 ---------- */

.page-faq .faq-escalate {
  margin-top: 8px;
}

.page-faq .faq-flow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 4px 0 16px;
}

.page-faq .faq-flow__node {
  padding: 6px 12px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: rgba(19, 28, 46, .72);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--ice-dim);
}

.page-faq .faq-flow__node--end {
  border-color: var(--neon);
  color: var(--neon);
  background: rgba(124, 255, 203, .1);
}

.page-faq .faq-flow__arrow {
  position: relative;
  flex: 0 0 auto;
  width: 22px;
  height: 1px;
  background: var(--line-strong);
}

.page-faq .faq-flow__arrow::after {
  content: "";
  position: absolute;
  right: 0;
  top: -3px;
  border-left: 5px solid var(--line-strong);
  border-top: 3.5px solid transparent;
  border-bottom: 3.5px solid transparent;
}

.page-faq .faq-escalate__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-faq .faq-escalate__panel {
  padding: 18px 16px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-1);
  min-width: 0;
}

.page-faq .faq-escalate__panel--contact {
  border-color: var(--line-neon);
  background: linear-gradient(160deg, rgba(10, 16, 28, .97), rgba(19, 28, 46, .94));
}

.page-faq .faq-escalate__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: -.005em;
  color: var(--ice);
}

.page-faq .faq-escalate__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 9px;
}

.page-faq .faq-escalate__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--ice-dim);
}

.page-faq .faq-escalate__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 1px;
  background: var(--neon-deep);
}

.page-faq .faq-escalate__note {
  margin: 14px 0 0;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--steel);
}

.page-faq .faq-escalate__contact {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-faq .faq-escalate__contact li {
  display: grid;
  gap: 3px;
  min-width: 0;
}

.page-faq .faq-escalate__key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--violet-soft);
}

.page-faq .faq-escalate__val {
  font-size: 14px;
  line-height: 1.55;
  color: var(--ice);
  word-break: break-word;
}

.page-faq .faq-escalate__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 0;
}

/* ---------- 断点 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-hero__panel {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-escalate__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

  .page-faq .qa__summary {
    padding: 15px 18px;
    font-size: 15px;
  }

  .page-faq .qa__body {
    padding: 0 18px 18px 44px;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1fr) 420px;
    gap: 48px;
    align-items: end;
  }

  .page-faq .faq-hero__panel {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: 44px;
  }

  .page-faq .faq-rail__sticky {
    position: sticky;
    top: 24px;
  }

  .page-faq .faq-rail__filters {
    flex-wrap: wrap;
    overflow: visible;
  }

  .page-faq .faq-block {
    margin-bottom: 48px;
  }

  .page-faq .faq-figure {
    max-width: 760px;
  }

  .page-faq .faq-escalate__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__marker::before,
  .page-faq .qa__marker::after,
  .page-faq .faq-rail__index a,
  .page-faq .faq-rail__filters .filter-button {
    transition: none;
  }
}
</main>