.page-faq {
  --faq-indent: 32px;
  display: block;
}

/* ---------- 页头 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 88px 0 116px;
  background:
    radial-gradient(circle at 84% 10%, rgba(138, 43, 226, 0.30), transparent 56%),
    radial-gradient(circle at 6% 90%, rgba(0, 229, 255, 0.16), transparent 52%),
    linear-gradient(158deg, var(--star-900) 0%, var(--star-800) 48%, var(--nebula) 100%);
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -10%;
  bottom: -120px;
  width: 56%;
  height: 240px;
  background: linear-gradient(90deg, rgba(0, 229, 255, 0.18), rgba(138, 43, 226, 0));
  transform: rotate(-12deg);
  pointer-events: none;
}

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

.page-faq .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  font-size: 13px;
  color: var(--muted);
}

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

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

.page-faq .faq-hero .eyebrow {
  margin: 28px 0 0;
}

.page-faq .faq-hero h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 7vw, 64px);
  line-height: 1.04;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-faq .faq-hero .lede {
  max-width: 46ch;
  margin: 18px 0 0;
  font-size: 17px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin: 34px 0 0;
  padding: 0;
}

.page-faq .faq-hero__stat {
  padding: 14px 16px 16px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--glass);
  backdrop-filter: blur(14px);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-hero__stat:hover {
  border-color: rgba(0, 229, 255, 0.42);
  transform: translateY(-2px);
}

.page-faq .faq-hero__stat dt {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-faq .faq-hero__stat dd {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: 19px;
  line-height: 1.4;
  color: var(--ink);
  overflow-wrap: break-word;
}

.page-faq .faq-hero__stat dd .num {
  font-size: 26px;
  color: var(--cyan);
  text-shadow: 0 0 18px rgba(0, 229, 255, 0.45);
}

/* ---------- 横幅图 ---------- */
.page-faq .faq-banner-wrap {
  position: relative;
  z-index: 2;
  margin-top: -72px;
}

.page-faq .faq-banner {
  margin: 0;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 32px 60px -32px rgba(4, 11, 20, 0.9);
}

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

/* ---------- 搜索条 ---------- */
.page-faq .faq-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 44px;
  padding-top: 26px;
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-toolbar__label {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
  white-space: nowrap;
}

.page-faq .faq-toolbar__input {
  flex: 1 1 260px;
  min-width: 0;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--star-900);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 15px;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-faq .faq-toolbar__input::placeholder {
  color: var(--muted);
}

.page-faq .faq-toolbar__input:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: var(--glow-cyan);
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
  align-items: start;
  margin-top: 32px;
}

/* ---------- 分类索引 ---------- */
.page-faq .faq-index {
  padding: 20px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(27, 36, 80, 0.72), rgba(11, 26, 47, 0.72));
  backdrop-filter: blur(14px);
}

.page-faq .faq-index__title {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-faq .faq-index__list {
  display: grid;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  padding: 10px 10px 10px 12px;
  border-left: 2px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--ink-soft);
  font-size: 14px;
  text-decoration: none;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background: rgba(0, 229, 255, 0.09);
  border-left-color: var(--cyan);
  color: var(--ink);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--violet);
}

.page-faq .faq-index__text {
  min-width: 0;
  overflow-wrap: break-word;
}

.page-faq .faq-index__count {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
}

.page-faq .faq-index__foot {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-index__foot a {
  color: var(--cyan);
  text-decoration: none;
}

.page-faq .faq-index__foot a:hover,
.page-faq .faq-index__foot a:focus-visible {
  text-decoration: underline;
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-groups {
  display: grid;
  gap: 44px;
  min-width: 0;
}

.page-faq .faq-group {
  min-width: 0;
  scroll-margin-top: calc(var(--topbar-h) + 28px);
}

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__index {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 3.4vw, 30px);
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-faq .faq-group__note {
  flex: 1 1 100%;
  margin: 2px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-list {
  margin-top: 4px;
}

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

.page-faq .faq-item summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 14px;
  align-items: start;
  padding: 18px 4px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item summary::marker {
  content: "";
}

.page-faq .faq-item__num {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-item__q {
  min-width: 0;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--ink);
  overflow-wrap: break-word;
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-item__marker {
  position: relative;
  flex: none;
  width: 16px;
  height: 16px;
  margin-top: 5px;
}

.page-faq .faq-item__marker::before,
.page-faq .faq-item__marker::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  border-radius: 2px;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-faq .faq-item__marker::before {
  top: 7px;
  left: 0;
  width: 16px;
  height: 2px;
}

.page-faq .faq-item__marker::after {
  top: 0;
  left: 7px;
  width: 2px;
  height: 16px;
}

.page-faq .faq-item summary:hover .faq-item__q,
.page-faq .faq-item summary:focus-visible .faq-item__q {
  color: var(--cyan);
}

.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.page-faq .faq-item[open] .faq-item__marker::after {
  transform: scaleY(0);
  opacity: 0;
}

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

.page-faq .faq-item[open] summary {
  padding-bottom: 8px;
}

.page-faq .faq-item__body {
  display: grid;
  gap: 8px;
  padding: 0 4px 20px 4px;
}

.page-faq .faq-item[open] .faq-item__body {
  animation: faq-body-in 240ms var(--ease) both;
}

.page-faq .faq-item__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  overflow-wrap: break-word;
}

.page-faq .faq-item__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, 0.35);
  transition: border-color var(--dur) var(--ease);
}

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

@keyframes faq-body-in {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 设备示意图 ---------- */
.page-faq .faq-device-figure {
  margin: 22px 0 12px;
  aspect-ratio: 4 / 3;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

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

.page-faq .faq-device-figure .media-frame__caption {
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 收尾行动区 ---------- */
.page-faq .faq-cta {
  margin-top: 72px;
  padding: 52px 0 64px;
  background: linear-gradient(118deg, var(--wine) 0%, var(--nebula) 58%, var(--star-800) 100%);
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-cta__inner {
  display: grid;
  gap: 26px;
  align-items: center;
}

.page-faq .faq-cta .eyebrow {
  margin: 0;
}

.page-faq .faq-cta h2 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 3.6vw, 34px);
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-faq .faq-cta p {
  max-width: 52ch;
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-item__body {
    padding-left: var(--faq-indent);
  }

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

@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: 264px minmax(0, 1fr);
    gap: 52px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--topbar-h) + 24px);
  }

  .page-faq .faq-hero {
    padding: 108px 0 132px;
  }
}

@media (min-width: 1100px) {
  .page-faq .faq-layout {
    grid-template-columns: 288px minmax(0, 1fr);
    gap: 64px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}