.page-faq {
  --faq-cut: 14px;
  --faq-line: rgba(30, 58, 99, 0.85);
  --faq-body: rgba(244, 247, 251, 0.86);
  background: var(--ink);
  color: var(--paper);
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + 28px) 0 52px;
  background:
    radial-gradient(115% 85% at 94% -12%, rgba(255, 107, 53, 0.18), transparent 62%),
    linear-gradient(180deg, var(--night) 0%, var(--ink) 82%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.55;
  background-image:
    repeating-linear-gradient(90deg, rgba(30, 58, 99, 0.5) 0 1px, transparent 1px 76px),
    repeating-linear-gradient(0deg, rgba(30, 58, 99, 0.32) 0 1px, transparent 1px 76px);
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 92%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 92%);
}

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

.page-faq .faq-hero-grid {
  display: grid;
  gap: 26px;
  margin-top: 22px;
}

.page-faq .faq-side-label {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mist);
}

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

.page-faq .faq-ticks li {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13px;
  color: var(--mist);
}

.page-faq .faq-ticks .mono {
  font-size: 11.5px;
  color: var(--signal);
}

.page-faq .faq-kicker {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--verified);
}

.page-faq .faq-hero h1 {
  margin: 0 0 20px;
  max-width: 13em;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(38px, 6.2vw, 80px);
  line-height: 1.02;
  letter-spacing: -0.015em;
}

.page-faq .faq-lead {
  margin: 0 0 26px;
  max-width: 44em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--faq-body);
}

.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ============ 编号定位 ============ */
.page-faq .faq-guide {
  padding: 46px 0 30px;
}

.page-faq .faq-guide-grid {
  display: grid;
  gap: 28px;
  align-items: center;
}

.page-faq .faq-guide h2 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(26px, 3.4vw, 42px);
  line-height: 1.14;
  letter-spacing: -0.01em;
}

.page-faq .faq-guide-lead {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--faq-body);
}

.page-faq .faq-rules {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-rules li {
  position: relative;
  padding-left: 26px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--faq-body);
}

.page-faq .faq-rules li strong {
  color: var(--paper);
  font-weight: 600;
}

.page-faq .faq-rules li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 0.62em;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: 1px solid var(--verified);
  background: rgba(46, 196, 182, 0.24);
}

.page-faq .faq-guide-figure {
  margin: 0;
}

.page-faq figcaption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mist);
}

/* ============ 问答库 ============ */
.page-faq .faq-library {
  padding: 20px 0 64px;
}

.page-faq .faq-library-grid {
  display: grid;
  gap: 30px;
  align-items: start;
}

.page-faq .faq-rail {
  padding: 20px 18px;
  border: 1px solid var(--steel);
  background: rgba(18, 43, 78, 0.6);
  clip-path: polygon(0 0, calc(100% - var(--faq-cut)) 0, 100% var(--faq-cut), 100% 100%, 0 100%);
}

.page-faq .faq-rail-title {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-rail-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
}

.page-faq .faq-rail-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 0;
  border-bottom: 1px dashed var(--faq-line);
  color: var(--mist);
  font-size: 13.5px;
  line-height: 1.4;
  text-decoration: none;
  transition: color 0.16s ease;
}

.page-faq .faq-rail-link .mono {
  flex: none;
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--signal);
}

.page-faq .faq-rail-link:hover,
.page-faq .faq-rail-link:focus-visible {
  color: var(--paper);
}

.page-faq .faq-legend {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--steel);
}

.page-faq .faq-legend-title {
  margin: 0 0 10px;
  font-size: 11.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-legend-row {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin: 0 0 8px;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--mist);
}

.page-faq .faq-legend-row .status-dot {
  margin-top: 5px;
  flex: none;
}

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

.page-faq .faq-index-figure {
  margin: 0 0 34px;
}

.page-faq .faq-topic {
  padding-top: 22px;
  margin-top: 34px;
  border-top: 1px solid var(--steel);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-topic:first-of-type {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.page-faq .faq-topic-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 8px;
}

.page-faq .faq-topic-num {
  flex: none;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--signal);
}

.page-faq .faq-topic h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(21px, 2.6vw, 30px);
  line-height: 1.2;
  letter-spacing: -0.005em;
}

.page-faq .faq-topic-note {
  margin: 0 0 12px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-item {
  border-bottom: 1px dashed var(--faq-line);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item summary:hover .faq-q {
  color: var(--signal);
}

.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 4px;
}

.page-faq .faq-idx {
  flex: none;
  padding-top: 3px;
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--signal);
}

.page-faq .faq-q {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--paper);
  transition: color 0.16s ease;
}

.page-faq .faq-open-icon {
  position: relative;
  flex: none;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  border: 1px solid var(--steel);
  border-radius: 2px;
}

.page-faq .faq-open-icon::before,
.page-faq .faq-open-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--signal);
  transform: translate(-50%, -50%);
}

.page-faq .faq-open-icon::before {
  width: 8px;
  height: 1.5px;
}

.page-faq .faq-open-icon::after {
  width: 1.5px;
  height: 8px;
  transition: transform 0.2s ease;
}

.page-faq .faq-item[open] .faq-open-icon::after {
  transform: translate(-50%, -50%) scaleY(0);
}

.page-faq .faq-item[open] .faq-q {
  color: var(--paper);
}

.page-faq .faq-a {
  padding-bottom: 20px;
}

.page-faq .faq-a > p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.82;
  color: var(--faq-body);
}

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

.page-faq .faq-a-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  margin-top: 14px;
  padding: 11px 14px;
  border: 1px dashed var(--steel);
  background: rgba(18, 43, 78, 0.45);
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--mist);
}

.page-faq .faq-a-meta .mono {
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--pending);
}

.page-faq .faq-a-meta a {
  color: var(--verified);
  text-decoration: none;
  border-bottom: 1px solid rgba(46, 196, 182, 0.45);
}

.page-faq .faq-a-meta a:hover,
.page-faq .faq-a-meta a:focus-visible {
  border-bottom-color: var(--verified);
}

/* ============ 结尾支持区 ============ */
.page-faq .faq-support {
  padding: 8px 0 72px;
}

.page-faq .faq-support-grid {
  display: grid;
  gap: 26px;
  align-items: start;
}

.page-faq .faq-support h2 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(25px, 3.2vw, 38px);
  line-height: 1.16;
  letter-spacing: -0.01em;
}

.page-faq .faq-support-text > p {
  margin: 0 0 22px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--faq-body);
}

.page-faq .faq-contact-panel {
  padding: 22px 20px;
}

.page-faq .faq-contact-title {
  margin: 0 0 16px;
  font-size: 11.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--signal);
}

.page-faq .faq-contact-list {
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-contact-list > div {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 12px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--faq-line);
}

.page-faq .faq-contact-list dt {
  flex: none;
  min-width: 96px;
  font-size: 12.5px;
  color: var(--mist);
}

.page-faq .faq-contact-list dd {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--paper);
  word-break: break-all;
}

.page-faq .faq-contact-note {
  margin: 16px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-contact-note a {
  color: var(--verified);
  text-decoration: none;
  border-bottom: 1px solid rgba(46, 196, 182, 0.45);
}

/* ============ 断点 ============ */
@media (min-width: 700px) {
  .page-faq .faq-a {
    padding-left: 26px;
  }

  .page-faq .faq-q {
    font-size: 16.5px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 52px;
    margin-top: 30px;
  }

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

  .page-faq .faq-guide-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 52px;
  }

  .page-faq .faq-support-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 48px;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-library-grid {
    grid-template-columns: 224px minmax(0, 1fr);
    gap: 52px;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }

  .page-faq .faq-a {
    padding-left: 54px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-open-icon::after,
  .page-faq .faq-q,
  .page-faq .faq-rail-link {
    transition: none;
  }
}