.page-faq {
  display: block;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 112px 0 48px;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(680px 300px at 8% -10%, rgba(124, 77, 255, .22), transparent 70%),
    radial-gradient(520px 260px at 92% 4%, rgba(0, 229, 199, .13), transparent 72%),
    var(--ink);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(35, 36, 58, .6) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(35, 36, 58, .6) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: .55;
  pointer-events: none;
  -webkit-mask-image: radial-gradient(120% 92% at 50% 0%, #000 18%, transparent 86%);
  mask-image: radial-gradient(120% 92% at 50% 0%, #000 18%, transparent 86%);
}

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

.page-faq .faq-hero .breadcrumb {
  margin-bottom: 20px;
}

.page-faq .faq-hero h1 {
  margin: 18px 0 0;
  font-size: clamp(31px, 7.6vw, 60px);
  line-height: 1.1;
  letter-spacing: .01em;
}

.page-faq .faq-hero h1 .tilt {
  display: inline-block;
  transform: rotate(-2.2deg);
  color: var(--cyan);
}

.page-faq .faq-hero__lead {
  max-width: 66ch;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.8;
}

.page-faq .faq-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-metrics li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 10px 16px;
  border: 1px solid var(--line);
  background: rgba(17, 18, 25, .8);
}

.page-faq .faq-metrics__num {
  font-family: var(--mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: .02em;
}

.page-faq .faq-metrics__label {
  font-size: 13px;
  color: var(--muted);
  letter-spacing: .04em;
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-body {
  padding: 44px 0 88px;
  background: var(--ink);
}

.page-faq .faq-layout {
  display: grid;
  gap: 28px;
}

.page-faq .faq-stream {
  display: grid;
  gap: 26px;
  min-width: 0;
}

/* ---------- 主题索引 ---------- */
.page-faq .faq-index {
  padding: 16px;
  border: 1px solid var(--line);
  background: var(--panel-deep);
}

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

.page-faq .faq-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-faq .faq-index__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  white-space: nowrap;
  color: var(--text);
  font-size: 14px;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background: rgba(124, 77, 255, .14);
  border-color: var(--line);
  color: #FFFFFF;
}

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

.page-faq .faq-index__no {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-faq .faq-index__hint {
  margin: 14px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-index__hint,
.page-faq .faq-index__title {
  display: none;
}

/* ---------- 分组面板 ---------- */
.page-faq .faq-group {
  position: relative;
  padding: 40px 18px 24px;
  scroll-margin-top: 104px;
}

.page-faq .panel__index {
  position: absolute;
  top: 0;
  left: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 46px;
  height: 26px;
  padding: 0 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--cyan);
  background: rgba(0, 229, 199, .08);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group .panel__title {
  margin: 0;
  font-size: clamp(22px, 5.2vw, 30px);
}

.page-faq .faq-group .panel__lead,
.page-faq .faq-glossary .panel__lead {
  max-width: 62ch;
  margin: 10px 0 20px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
}

/* ---------- 折叠问答 ---------- */
.page-faq .accordion {
  border-top: 1px solid var(--line);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
  transition: border-color .2s var(--ease), background .2s var(--ease);
}

.page-faq .faq-item:has(.faq-item__trigger[aria-expanded="true"]) {
  border-bottom-color: var(--cyan);
}

.page-faq .faq-item__head {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-faq .faq-item__trigger {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  width: 100%;
  padding: 16px 44px 16px 2px;
  background: transparent;
  border: 0;
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  text-align: left;
  cursor: pointer;
  transition: color .2s var(--ease);
}

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

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

.page-faq .faq-item__no {
  flex: 0 0 auto;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.95;
  letter-spacing: .06em;
  color: var(--muted);
  transition: color .2s var(--ease);
}

.page-faq .faq-item__trigger[aria-expanded="true"] .faq-item__no {
  color: var(--cyan);
}

.page-faq .faq-item__trigger .accordion__icon {
  position: absolute;
  top: 19px;
  right: 6px;
  width: 14px;
  height: 14px;
}

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

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

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

.page-faq .faq-item__trigger[aria-expanded="true"] .accordion__icon::before {
  background: var(--cyan);
}

.page-faq .faq-item__trigger[aria-expanded="true"] .accordion__icon::after {
  transform: scaleY(0);
  background: var(--cyan);
}

.page-faq .faq-item__panel {
  padding: 0 40px 18px 2px;
  animation: faq-panel-in .2s var(--ease);
}

.page-faq .faq-item__panel p {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}

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

.page-faq .faq-item__panel .faq-item__links {
  margin-top: 14px;
  font-size: 13px;
}

.page-faq .faq-item__links a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 199, .38);
}

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

@keyframes faq-panel-in {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 22px 0 0;
}

.page-faq .faq-figure .media-frame {
  width: 100%;
  aspect-ratio: 1200 / 760;
}

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

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 术语速查 ---------- */
.page-faq .glossary-grid {
  display: grid;
  gap: 12px;
  margin-top: 4px;
}

.page-faq .glossary-card {
  padding: 16px;
  border: 1px solid var(--line);
  background: var(--panel-deep);
  transition: border-color .2s var(--ease), transform .2s var(--ease);
}

.page-faq .glossary-card:hover {
  border-color: var(--violet);
  transform: translateY(-2px);
}

.page-faq .glossary-card__term {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--cyan);
}

.page-faq .glossary-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 底部行动区 ---------- */
.page-faq .faq-cta {
  position: relative;
  padding: 44px 20px 28px;
  border-color: var(--violet);
  background:
    linear-gradient(135deg, rgba(124, 77, 255, .16), rgba(0, 229, 199, .07)),
    var(--panel);
}

.page-faq .faq-cta .panel__title {
  margin: 0;
  font-size: clamp(22px, 5vw, 28px);
}

.page-faq .faq-cta__text {
  max-width: 60ch;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.page-faq .faq-cta__mail {
  margin: 18px 0 0;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--muted);
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 640px) {
  .page-faq .glossary-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-group {
    padding: 44px 26px 26px;
  }

  .page-faq .faq-item__trigger {
    font-size: 17px;
  }

  .page-faq .faq-item__panel {
    padding-right: 72px;
    max-width: 72ch;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-hero {
    padding: 132px 0 60px;
  }

  .page-faq .faq-layout {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 104px;
    padding: 20px 18px;
  }

  .page-faq .faq-index__title,
  .page-faq .faq-index__hint {
    display: block;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding: 0;
  }

  .page-faq .faq-index__link {
    white-space: normal;
  }

  .page-faq .glossary-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1240px) {
  .page-faq .faq-group {
    padding: 46px 32px 28px;
  }

  .page-faq .faq-cta {
    padding: 48px 32px 32px;
  }
}

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

  .page-faq .glossary-card:hover {
    transform: none;
  }
}