.page-faq {
  --faq-hair: rgba(159, 179, 196, 0.22);
  --faq-hair-strong: rgba(159, 179, 196, 0.4);
  --faq-gap: clamp(20px, 3vw, 36px);
  background: var(--c-deep);
  color: var(--c-paper);
  font-family: var(--font-body);
  line-height: 1.75;
  padding-bottom: clamp(56px, 8vw, 104px);
}

.page-faq > .content-wrap {
  width: var(--shell);
  margin-inline: auto;
}

.page-faq .mono,
.page-faq .qa__code,
.page-faq .faq-hero__kicker,
.page-faq .idx-card__code,
.page-faq .idx-card__count,
.page-faq .faq-meta__label,
.page-faq .faq-meta__count,
.page-faq .faq-foot__contact {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

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

.page-faq a:focus-visible,
.page-faq summary:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: 2px;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--c-scale);
}

.page-faq .breadcrumb__link {
  color: var(--c-scale);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 120ms linear, border-color 120ms linear;
}

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

.page-faq .breadcrumb__sep {
  color: var(--faq-hair-strong);
}

/* ---------- 首屏框景 ---------- */
.page-faq .faq-intro {
  padding-top: clamp(24px, 4vw, 48px);
}

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--faq-hair-strong);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(22, 50, 75, 0.92) 0%, rgba(16, 38, 58, 0.96) 100%);
  padding: clamp(26px, 4vw, 50px);
  padding-left: clamp(34px, 5vw, 66px);
  box-shadow: var(--shadow-panel);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 12px;
  background: repeating-linear-gradient(
    to bottom,
    var(--c-amber) 0 2px,
    transparent 2px 16px
  );
  opacity: 0.55;
}

.page-faq .faq-hero__kicker {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

.page-faq .faq-hero__title {
  margin: 0 0 18px;
  max-width: 20ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 4.6vw, 50px);
  line-height: 1.16;
  letter-spacing: -0.015em;
  color: var(--c-paper);
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  color: var(--c-sand);
}

.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 30px;
  margin: 26px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--faq-hair);
  list-style: none;
  font-size: 13px;
  color: var(--c-scale);
}

.page-faq .faq-hero__facts strong {
  margin-right: 6px;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 14px;
  color: var(--c-amber);
}

/* ---------- 章节头 ---------- */
.page-faq .chapter-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--c-raised);
}

.page-faq .chapter-head__index {
  flex: none;
  padding: 3px 9px;
  border-radius: 2px;
  background: var(--c-cyan);
  color: var(--c-deep);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
}

.page-faq .chapter-head__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 2.6vw, 26px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--c-paper);
}

/* ---------- 快速索引 ---------- */
.page-faq .faq-index {
  margin-top: clamp(38px, 6vw, 72px);
  scroll-margin-top: 96px;
}

.page-faq .faq-index__lead,
.page-faq .faq-group__lead {
  margin: 16px 0 0;
  max-width: 58ch;
  font-size: 15px;
  color: var(--c-scale);
}

.page-faq .faq-index__grid {
  display: grid;
  gap: var(--faq-gap);
  margin-top: 22px;
}

.page-faq .faq-index__list {
  display: grid;
  gap: 12px;
}

.page-faq .idx-card {
  padding: 16px 18px 18px;
  border: 1px solid var(--faq-hair);
  border-radius: var(--radius);
  background: var(--glass);
  backdrop-filter: blur(6px);
  transition: border-color 140ms var(--ease), background-color 140ms var(--ease);
}

.page-faq .idx-card:hover {
  border-color: var(--c-amber-deep);
  background: var(--glass-strong);
}

.page-faq .idx-card__head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 10px;
  margin-bottom: 10px;
  border-bottom: 1px dashed var(--faq-hair);
}

.page-faq .idx-card__code {
  flex: none;
  padding: 2px 8px;
  border-radius: 2px;
  background: var(--c-amber);
  color: var(--c-deep);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.page-faq .idx-card__title {
  margin: 0;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--c-paper);
}

.page-faq .idx-card__count {
  margin-left: auto;
  font-size: 12px;
  color: var(--c-scale);
}

.page-faq .idx-links {
  display: grid;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .idx-links a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 4px 6px;
  border-radius: 2px;
  font-size: 14px;
  line-height: 1.55;
  color: var(--c-sand);
  text-decoration: none;
  transition: color 120ms linear, background-color 120ms linear;
}

.page-faq .idx-links a .mono {
  flex: none;
  width: 32px;
  font-size: 12px;
  color: var(--c-cyan);
}

.page-faq .idx-links a:hover {
  color: var(--c-paper);
  background: var(--c-raised);
}

.page-faq .faq-index__figure {
  margin: 0;
}

.page-faq .faq-index__figure {
  border: 1px solid var(--faq-hair);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--c-panel);
}

.page-faq .faq-index__figure img,
.page-faq .faq-group__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.86) contrast(1.06);
}

.page-faq .faq-index__figure figcaption,
.page-faq .faq-group__figure figcaption {
  padding: 12px 14px;
  border-top: 1px solid var(--faq-hair);
  background: var(--c-deep);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--c-scale);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  margin-top: clamp(44px, 6vw, 84px);
  scroll-margin-top: 92px;
}

.page-faq .faq-group--last {
  padding-bottom: 8px;
  border-bottom: 8px solid var(--c-raised);
}

.page-faq .faq-group__grid {
  display: grid;
  gap: var(--faq-gap);
  margin-top: 18px;
}

.page-faq .faq-group__figure {
  margin: 22px 0 24px;
  border: 1px solid var(--faq-hair);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--c-panel);
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa {
  margin-bottom: 10px;
  border: 1px solid var(--faq-hair);
  border-radius: var(--radius);
  background: var(--c-panel);
  scroll-margin-top: 104px;
  transition: border-color 140ms var(--ease);
}

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

.page-faq .qa[open] {
  border-color: rgba(242, 163, 60, 0.42);
}

.page-faq .qa__summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 15px 16px;
  border-left: 3px solid transparent;
  cursor: pointer;
  list-style: none;
  transition: background-color 120ms linear, border-color 120ms linear;
}

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

.page-faq .qa[open] > .qa__summary {
  background: var(--c-raised);
  border-left-color: var(--c-amber);
}

.page-faq .qa__code {
  flex: none;
  min-width: 30px;
  padding-top: 2px;
  font-size: 12.5px;
  letter-spacing: 0.05em;
  color: var(--c-amber);
}

.page-faq .qa__q {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 15.5px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--c-paper);
}

.page-faq .qa__mark {
  position: relative;
  flex: none;
  align-self: center;
  width: 14px;
  height: 14px;
  margin-left: auto;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  background: var(--c-scale);
  transition: transform 180ms var(--ease), background-color 120ms linear;
}

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

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

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

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

.page-faq .qa__body {
  padding: 4px 16px 20px;
  border-top: 1px solid var(--faq-hair);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--c-sand);
}

.page-faq .qa__body p {
  margin: 14px 0 0;
}

.page-faq .qa__body a {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(89, 227, 208, 0.4);
}

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

/* ---------- 步骤条 ---------- */
.page-faq .faq-steps {
  display: grid;
  gap: 9px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: faqstep;
}

.page-faq .faq-steps li {
  position: relative;
  counter-increment: faqstep;
  padding: 10px 12px 10px 46px;
  border: 1px solid var(--faq-hair);
  border-radius: 2px;
  background: rgba(10, 26, 42, 0.62);
  font-size: 14px;
}

.page-faq .faq-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 13px;
  top: 11px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--c-cyan);
}

/* ---------- 保对照表 ---------- */
.page-faq .faq-table-wrap {
  margin-top: 16px;
  overflow-x: auto;
  border: 1px solid var(--faq-hair);
  border-radius: 2px;
}

.page-faq .data-table {
  width: 100%;
  min-width: 420px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-faq .data-table th,
.page-faq .data-table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .data-table thead th {
  background: var(--c-raised);
  color: var(--c-paper);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.04em;
}

.page-faq .data-table tbody th {
  font-weight: 500;
  color: var(--c-scale);
}

.page-faq .data-table tbody tr:nth-child(even) {
  background: rgba(10, 26, 42, 0.5);
}

.page-faq .data-table td.mono {
  color: var(--c-amber);
}

/* ---------- 边界说明 ---------- */
.page-faq .faq-boundary {
  display: grid;
  gap: 14px;
  margin-top: 22px;
}

.page-faq .bcard {
  padding: 18px 20px 20px;
  border: 1px solid var(--faq-hair);
  border-top: 3px solid var(--c-alert);
  border-radius: var(--radius);
  background: var(--glass);
  backdrop-filter: blur(6px);
}

.page-faq .bcard--amber {
  border-top-color: var(--c-amber);
}

.page-faq .bcard--jade {
  border-top-color: var(--c-jade);
}

.page-faq .bcard__title {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--c-paper);
}

.page-faq .bcard ul {
  margin: 12px 0 0;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-sand);
}

.page-faq .bcard li {
  margin-bottom: 7px;
}

.page-faq .bcard li::marker {
  color: var(--c-scale);
}

/* ---------- 分组侧栏刻度 ---------- */
.page-faq .faq-meta {
  padding: 16px 18px 18px;
  border: 1px solid var(--faq-hair);
  border-left: 3px solid var(--c-amber);
  border-radius: var(--radius);
  background: var(--glass);
  backdrop-filter: blur(6px);
}

.page-faq .faq-meta__label {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-amber);
}

.page-faq .faq-meta__count {
  margin: 0 0 12px;
  font-size: 28px;
  font-weight: 500;
  line-height: 1;
  color: var(--c-paper);
}

.page-faq .faq-meta__count span {
  margin-left: 5px;
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--c-scale);
}

.page-faq .faq-meta__note {
  margin: 0 0 16px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-scale);
}

/* ---------- 页尾 ---------- */
.page-faq .faq-foot {
  display: grid;
  gap: 18px;
  margin-top: clamp(44px, 6vw, 80px);
  padding: clamp(22px, 3.4vw, 38px);
  border: 1px solid var(--faq-hair-strong);
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(22, 50, 75, 0.94) 0%, rgba(10, 26, 42, 0.97) 100%);
  box-shadow: var(--shadow-panel);
}

.page-faq .faq-foot__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(19px, 2.4vw, 24px);
  color: var(--c-paper);
}

.page-faq .faq-foot__text {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  color: var(--c-sand);
}

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

.page-faq .faq-foot__contact {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-scale);
  word-break: break-word;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-index__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .qa__body {
    padding-left: 42px;
  }

  .page-faq .qa__summary {
    padding: 16px 18px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-boundary {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-index__grid {
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-group__grid {
    grid-template-columns: minmax(0, 1fr) 262px;
    align-items: start;
  }

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

  .page-faq .faq-foot {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-faq .faq-foot__contact {
    grid-column: 1 / -1;
    padding-top: 14px;
    border-top: 1px solid var(--faq-hair);
  }
}

@media (max-width: 480px) {
  .page-faq .qa__summary {
    flex-wrap: wrap;
    gap: 6px 10px;
  }

  .page-faq .qa__mark {
    align-self: flex-start;
    margin-top: 6px;
  }

  .page-faq .faq-steps li {
    padding-left: 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}