.page-faq {
  --faq-side: 248px;
  position: relative;
  padding-bottom: clamp(72px, 10vw, 128px);
  background:
    radial-gradient(120% 55% at 92% -10%, rgba(198, 255, 61, .09), transparent 60%),
    radial-gradient(80% 45% at -6% 3%, rgba(53, 208, 255, .07), transparent 58%);
}

/* ---------- 首屏 ---------- */
.page-faq .guide-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 4.5vw, 48px) 0 clamp(40px, 6vw, 68px);
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .guide-hero::before {
  content: "";
  position: absolute;
  top: -40%;
  right: -14%;
  width: 44%;
  height: 200%;
  background: linear-gradient(180deg, rgba(198, 255, 61, .14), rgba(198, 255, 61, 0) 70%);
  transform: rotate(16deg);
  pointer-events: none;
}

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

.page-faq .breadcrumb {
  margin-bottom: 26px;
}

.page-faq .guide-hero__eyebrow {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--pulse);
}

.page-faq .guide-hero__title {
  margin: 0;
  max-width: 18ch;
  font-size: clamp(32px, 6.2vw, 72px);
  line-height: 1.04;
  letter-spacing: -.03em;
  font-weight: 900;
  color: var(--text);
}

.page-faq .guide-hero__lede {
  margin: 24px 0 0;
  max-width: 620px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .guide-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 42px;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .guide-hero__facts .stat {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-faq .guide-hero__facts .stat__value {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 700;
  line-height: 1;
  color: var(--pulse);
  font-variant-numeric: tabular-nums;
}

.page-faq .guide-hero__facts .stat__label {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--muted);
}

/* ---------- 索引 + 正文两层 ---------- */
.page-faq .guide-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(34px, 5vw, 58px);
  padding-top: clamp(38px, 5.5vw, 72px);
  align-items: start;
}

.page-faq .guide-index {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(22, 35, 58, .55);
  padding: 20px 16px;
}

.page-faq .guide-index__label {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .guide-index__list {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .guide-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 10px 10px 8px;
  border-left: 2px solid transparent;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.45;
  text-decoration: none;
  transition: color .18s ease, border-color .18s ease, background-color .18s ease;
}

.page-faq .guide-index__link:hover,
.page-faq .guide-index__link:focus-visible {
  color: var(--text);
  border-left-color: var(--pulse);
  background-color: rgba(198, 255, 61, .07);
}

.page-faq .guide-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--pulse);
  flex: none;
}

.page-faq .guide-body {
  min-width: 0;
}

/* ---------- 分组 ---------- */
.page-faq .guide-group + .guide-group {
  margin-top: clamp(56px, 8vw, 104px);
}

.page-faq .guide-group__head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: 22px;
}

.page-faq .guide-group__num {
  margin: 0;
  flex: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .2em;
  color: var(--pulse);
}

.page-faq .guide-group--cyan .guide-group__num {
  color: var(--cyan);
}

.page-faq .guide-group__title {
  margin: 0;
  font-size: clamp(22px, 3vw, 32px);
  letter-spacing: -.02em;
  font-weight: 800;
  line-height: 1.25;
  color: var(--text);
}

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

/* ---------- 可展开问答 ---------- */
.page-faq .qa {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(22, 35, 58, .5);
  transition: border-color .2s ease, background-color .2s ease;
}

.page-faq .qa:hover {
  border-color: rgba(198, 255, 61, .45);
}

.page-faq .qa[open] {
  border-color: rgba(198, 255, 61, .62);
  background: rgba(22, 35, 58, .82);
}

.page-faq .qa__q {
  position: relative;
  display: block;
  list-style: none;
  cursor: pointer;
  padding: 18px 56px 18px 20px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--text);
}

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

.page-faq .qa__q::marker {
  content: "";
}

.page-faq .qa__q::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 20px;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--pulse);
}

.page-faq .qa[open] .qa__q::after {
  content: "−";
}

.page-faq .qa__a {
  border-top: 1px solid var(--line-soft);
  padding: 16px 20px 22px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .qa__a p {
  margin: 0 0 10px;
}

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

.page-faq .qa__a strong {
  color: var(--text);
  font-weight: 600;
}

/* ---------- 步骤块 ---------- */
.page-faq .steps {
  display: grid;
  gap: 10px;
  margin: 16px 0 0;
  padding: 15px 16px;
  list-style: none;
  border: 1px solid var(--line-soft);
  border-left: 2px solid var(--pulse);
  border-radius: var(--radius);
  background: rgba(7, 11, 20, .62);
}

.page-faq .steps__item {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 10px;
  font-size: 14px;
  line-height: 1.7;
}

.page-faq .steps__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--pulse);
  padding-top: 3px;
}

.page-faq .steps__text {
  color: var(--text);
}

/* ---------- 配图 ---------- */
.page-faq .guide-figure {
  margin: 22px 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-800);
}

.page-faq .guide-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-faq .guide-figure__caption {
  margin: 0;
  padding: 12px 16px;
  font-size: 12px;
  letter-spacing: .05em;
  line-height: 1.7;
  color: var(--muted);
  border-top: 1px solid var(--line-soft);
}

/* ---------- 联系卡片 ---------- */
.page-faq .guide-contact {
  margin-top: 14px;
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--kick);
  border-radius: var(--radius);
  background: linear-gradient(120deg, rgba(255, 122, 26, .1), rgba(22, 35, 58, .5) 48%);
}

.page-faq .guide-contact__label {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .28em;
  color: var(--kick);
}

.page-faq .guide-contact__row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.7;
}

.page-faq .guide-contact__key {
  flex: none;
  min-width: 76px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--muted);
  padding-top: 2px;
}

.page-faq .guide-contact__val {
  color: var(--text);
  word-break: break-word;
}

.page-faq .guide-contact__note {
  margin: 14px 0 0;
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--muted);
}

/* ---------- 返回顶部 ---------- */
.page-faq .guide-top-link {
  position: fixed;
  right: 18px;
  bottom: 20px;
  z-index: 30;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(13, 20, 36, .94);
  color: var(--pulse);
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  text-decoration: none;
  box-shadow: var(--shadow-soft);
  transition: border-color .2s ease, transform .2s ease;
}

.page-faq .guide-top-link:hover,
.page-faq .guide-top-link:focus-visible {
  border-color: var(--pulse);
  transform: translateY(-2px);
}

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-faq .guide-layout {
    grid-template-columns: var(--faq-side) minmax(0, 1fr);
    gap: 72px;
  }

  .page-faq .guide-index {
    position: sticky;
    top: 108px;
    background: linear-gradient(180deg, rgba(22, 35, 58, .92), rgba(13, 20, 36, .72));
  }

  .page-faq .guide-index__list {
    gap: 4px;
  }

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

  .page-faq .qa__a {
    padding: 18px 22px 24px;
  }
}

/* ---------- 窄屏 ---------- */
@media (max-width: 560px) {
  .page-faq .guide-hero__facts {
    gap: 14px 26px;
  }

  .page-faq .guide-hero__facts .stat__value {
    font-size: 26px;
  }

  .page-faq .guide-group__head {
    gap: 12px;
  }

  .page-faq .qa__q {
    font-size: 15px;
    padding: 16px 48px 16px 16px;
  }

  .page-faq .qa__q::after {
    right: 16px;
  }

  .page-faq .qa__a {
    padding: 14px 16px 20px;
  }

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

  .page-faq .guide-top-link {
    right: 12px;
    bottom: 14px;
    width: 38px;
    height: 38px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .guide-index__link,
  .page-faq .qa,
  .page-faq .guide-top-link {
    transition: none;
  }

  .page-faq .guide-top-link:hover,
  .page-faq .guide-top-link:focus-visible {
    transform: none;
  }
}