.page-faq {
  --faq-rule: rgba(159, 179, 204, .22);
  --faq-card: rgba(12, 44, 92, .55);
  --faq-radius: 22px;
  padding-bottom: 72px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 22px 0 44px;
  background:
    radial-gradient(120% 92% at 92% 4%, rgba(44, 123, 234, .30), transparent 62%),
    linear-gradient(165deg, var(--deep) 0%, var(--night) 78%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(159, 179, 204, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(159, 179, 204, .07) 1px, transparent 1px);
  background-size: 46px 46px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .85), transparent 76%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .85), transparent 76%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 30px;
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: 18px;
}

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

.page-faq .faq-hero h1 {
  margin: 0 0 16px;
  font-size: 34px;
  line-height: 1.14;
  font-weight: 900;
  letter-spacing: -.01em;
  color: var(--porcelain);
}

.page-faq .faq-hero__lead {
  margin: 0 0 24px;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 26px;
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--mist);
}

.page-faq .faq-hero__meta li {
  display: flex;
  align-items: baseline;
  gap: 7px;
}

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

.page-faq .faq-hero__visual {
  position: relative;
  margin: 0;
  border-radius: var(--r-xl);
  overflow: hidden;
  border: 1px solid rgba(159, 179, 204, .28);
  background: linear-gradient(150deg, rgba(18, 74, 143, .55), rgba(5, 22, 47, .92));
  aspect-ratio: 3 / 2;
}

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

/* ---------- 主体骨架 ---------- */
.page-faq .faq-body {
  padding-top: 34px;
}

.page-faq .faq-body__inner {
  display: grid;
  gap: 30px;
}

/* ---------- 分组目录 ---------- */
.page-faq .faq-index {
  align-self: start;
}

.page-faq .faq-index__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-index__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index__list a {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 9px 11px;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  font-size: 13px;
  line-height: 1.4;
  color: var(--mist);
  text-decoration: none;
  transition: color .2s var(--ease), background-color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--lime-deep);
  letter-spacing: .06em;
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--porcelain);
  background: rgba(18, 74, 143, .55);
  border-color: rgba(44, 123, 234, .55);
}

/* ---------- 分组 ---------- */
.page-faq .faq-groups {
  display: grid;
  gap: 46px;
}

.page-faq .faq-group {
  scroll-margin-top: 84px;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding-bottom: 14px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
  letter-spacing: .02em;
}

.page-faq .faq-group__meta h2 {
  margin: 0 0 8px;
  font-size: 22px;
  line-height: 1.28;
  font-weight: 800;
  color: var(--porcelain);
}

.page-faq .faq-group__text {
  margin: 0;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 定位球配图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 20px;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--faq-rule);
  background: linear-gradient(140deg, rgba(18, 74, 143, .5), rgba(5, 22, 47, .9));
}

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

.page-faq .faq-figure figcaption {
  padding: 11px 16px 13px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mist);
  border-top: 1px solid var(--faq-rule);
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 12px;
}

.page-faq .qa {
  border: 1px solid var(--faq-rule);
  border-radius: var(--faq-radius);
  background: linear-gradient(180deg, var(--faq-card), rgba(5, 22, 47, .75));
  overflow: hidden;
  transition: border-color .22s var(--ease), transform .22s var(--ease);
}

.page-faq .qa:hover {
  border-color: rgba(44, 123, 234, .62);
  transform: translateY(-3px);
}

.page-faq .qa[open] {
  border-color: rgba(200, 255, 61, .55);
  transform: none;
}

.page-faq .qa__q {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  color: var(--ink);
  transition: background-color .2s var(--ease);
}

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

.page-faq .qa__q:hover {
  background: rgba(44, 123, 234, .12);
}

.page-faq .qa__idx {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--signal);
}

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

.page-faq .qa__text {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 15.5px;
  line-height: 1.55;
  font-weight: 700;
  color: var(--porcelain);
}

.page-faq .qa__tag {
  flex: 0 0 auto;
  display: none;
}

.page-faq .qa__toggle {
  position: relative;
  flex: 0 0 auto;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1px solid rgba(159, 179, 204, .5);
  color: var(--porcelain);
  transition: border-color .22s var(--ease), background-color .22s var(--ease);
}

.page-faq .qa__toggle::before,
.page-faq .qa__toggle::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: currentColor;
  transform: translate(-50%, -50%);
  transition: transform .22s var(--ease), opacity .22s var(--ease);
}

.page-faq .qa__toggle::before {
  width: 10px;
  height: 2px;
}

.page-faq .qa__toggle::after {
  width: 2px;
  height: 10px;
}

.page-faq .qa[open] .qa__toggle {
  border-color: var(--lime);
  background: rgba(200, 255, 61, .14);
  color: var(--lime);
}

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

.page-faq .qa__a {
  padding: 0 18px 18px 44px;
  border-top: 1px solid rgba(200, 255, 61, .18);
  margin-top: -1px;
}

.page-faq .qa__a p {
  margin: 14px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .qa__a a {
  color: var(--signal);
  text-underline-offset: 3px;
}

.page-faq .qa__a a:hover {
  color: var(--lime);
}

/* ---------- 尾部引导 ---------- */
.page-faq .faq-cta {
  display: grid;
  gap: 16px;
  padding: 26px 22px;
  border-radius: var(--r-xl);
  border: 1px solid rgba(255, 176, 32, .38);
  background:
    radial-gradient(110% 120% at 100% 0%, rgba(255, 90, 43, .18), transparent 60%),
    linear-gradient(160deg, rgba(12, 44, 92, .85), rgba(5, 22, 47, .92));
}

.page-faq .faq-cta__num {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
  letter-spacing: .03em;
}

.page-faq .faq-cta__body h2 {
  margin: 0 0 10px;
  font-size: 22px;
  line-height: 1.28;
  font-weight: 800;
  color: var(--porcelain);
}

.page-faq .faq-cta__body p {
  margin: 0 0 16px;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-cta__list {
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 9px;
}

.page-faq .faq-cta__list li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
}

.page-faq .faq-cta__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: 2px solid var(--ember);
}

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

/* ---------- 目标分组轻微提示 ---------- */
.page-faq .faq-group:target .faq-group__head {
  border-bottom-color: rgba(200, 255, 61, .5);
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero {
    padding: 28px 0 56px;
  }

  .page-faq .faq-hero h1 {
    font-size: 42px;
  }

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

  .page-faq .qa__q {
    padding: 18px 22px;
  }

  .page-faq .qa__tag {
    display: inline-flex;
  }

  .page-faq .qa__a {
    padding: 0 22px 20px 60px;
  }

  .page-faq .faq-cta {
    grid-template-columns: auto minmax(0, 1fr);
    gap: 20px;
    padding: 32px 30px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1024px) {
  .page-faq .faq-hero {
    padding: 34px 0 64px;
  }

  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: center;
    gap: 44px;
  }

  .page-faq .faq-hero h1 {
    font-size: 50px;
  }

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

  .page-faq .faq-body {
    padding-top: 46px;
  }

  .page-faq .faq-body__inner {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 28px;
    padding-right: 20px;
    border-right: 1px solid var(--faq-rule);
  }

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

  .page-faq .faq-groups {
    gap: 58px;
  }

  .page-faq .faq-group__num {
    font-size: 34px;
  }

  .page-faq .faq-group__meta h2 {
    font-size: 26px;
  }
}

/* ---------- 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__toggle,
  .page-faq .qa__toggle::before,
  .page-faq .qa__toggle::after,
  .page-faq .faq-index__list a {
    transition: none;
  }

  .page-faq .qa:hover {
    transform: none;
  }
}