.page-faq {
  --faq-media: var(--bg-carbon);
  --faq-step-glow: rgba(182, 255, 60, 0.07);
  display: block;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-lead {
  padding-block: clamp(24px, 3.6vw, 44px) clamp(18px, 2.6vw, 30px);
  background:
    radial-gradient(70% 140% at 6% 0%, rgba(182, 255, 60, 0.09), transparent 65%),
    radial-gradient(60% 140% at 96% 8%, rgba(47, 224, 255, 0.07), transparent 65%);
}

.page-faq .faq-lead__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.75rem, 4.4vw, 2.75rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 12px 0 16px;
  max-width: 22em;
  color: var(--text-main);
}

.page-faq .faq-lead__lede {
  max-width: 44em;
  margin: 0;
  color: var(--text-soft);
}

.page-faq .faq-lead__facts {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 14px clamp(20px, 4vw, 48px);
}

.page-faq .faq-lead__facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 0.8125rem;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

.page-faq .faq-lead__facts .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--accent-lime);
}

/* ---------- 顶部横幅 ---------- */
.page-faq .faq-banner {
  margin: 0 0 clamp(32px, 4.6vw, 60px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--faq-media);
  box-shadow: var(--shadow-card);
}

.page-faq .faq-banner img {
  display: block;
  width: 100%;
  height: clamp(150px, 24vw, 300px);
  object-fit: cover;
  object-position: center 42%;
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-main {
  padding-bottom: clamp(40px, 5vw, 70px);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
  align-items: start;
}

/* 分类索引 */
.page-faq .faq-index {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--bg-carbon);
  padding: 16px 14px 18px;
}

.page-faq .faq-index__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-muted);
}

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

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  padding: 11px 12px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--text-soft);
  font-size: 0.9375rem;
  transition: background 180ms var(--ease), border-color 180ms var(--ease), color 180ms var(--ease), transform 180ms var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background: var(--bg-graphite);
  border-color: var(--lime-line);
  color: var(--text-main);
  transform: translateX(2px);
}

.page-faq .faq-index__num,
.page-faq .faq-index__count {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.75rem;
}

.page-faq .faq-index__num {
  color: var(--accent-lime);
  letter-spacing: 0.06em;
}

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

.page-faq .faq-index .note {
  margin: 16px 2px 0;
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-groups {
  display: grid;
  gap: clamp(38px, 5vw, 62px);
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: 104px;
  min-width: 0;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--line-strong);
  position: relative;
}

.page-faq .faq-group__head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 68px;
  height: 2px;
  background: var(--accent-lime);
}

.page-faq .faq-group__head h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.25rem, 2.4vw, 1.5rem);
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--text-main);
}

.page-faq .faq-group__count {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.75rem;
  color: var(--text-muted);
  white-space: nowrap;
}

/* ---------- 折叠条目 ---------- */
.page-faq .faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--bg-carbon);
  margin-bottom: 10px;
  transition: border-color 180ms var(--ease), background 180ms var(--ease), box-shadow 180ms var(--ease);
}

.page-faq .faq-item:hover {
  border-color: var(--line-strong);
}

.page-faq .faq-item[open] {
  border-color: var(--lime-line);
  background: var(--bg-graphite);
  box-shadow: var(--shadow-card);
}

.page-faq .faq-item > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 17px 18px;
  border-radius: var(--radius-md);
}

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

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--accent-lime);
  outline-offset: 2px;
}

.page-faq .faq-item__q {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1rem;
  line-height: 1.55;
  color: var(--text-main);
  letter-spacing: -0.005em;
}

.page-faq .faq-item[open] .faq-item__q {
  color: var(--text-main);
}

.page-faq .faq-item__arrow {
  flex: none;
  width: 9px;
  height: 9px;
  margin-top: 7px;
  border-right: 2px solid var(--accent-lime);
  border-bottom: 2px solid var(--accent-lime);
  transform: rotate(45deg);
  transition: transform 200ms var(--ease);
}

.page-faq .faq-item[open] .faq-item__arrow {
  transform: rotate(-135deg);
}

.page-faq .faq-item__body {
  padding: 0 18px 18px;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--text-soft);
}

.page-faq .faq-item__body p {
  margin: 0;
}

/* ---------- 三步示意 ---------- */
.page-faq .faq-visual {
  display: grid;
  gap: 20px;
  margin-top: 20px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background:
    linear-gradient(160deg, rgba(47, 224, 255, 0.05), transparent 58%),
    var(--bg-carbon);
  min-width: 0;
}

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

.page-faq .faq-visual__figure img {
  display: block;
  width: 100%;
  max-width: 260px;
  height: auto;
  margin-inline: auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
}

.page-faq .faq-visual__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.125rem;
  margin: 8px 0 14px;
  color: var(--text-main);
}

.page-faq .faq-steps {
  list-style: none;
  margin: 0 0 12px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-steps__item {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  color: var(--text-soft);
  transition: border-color 220ms var(--ease), background 220ms var(--ease), color 220ms var(--ease);
}

.page-faq .faq-steps__no {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-lime);
  letter-spacing: 0.06em;
}

.page-faq .faq-steps:hover .faq-steps__item,
.page-faq .faq-steps:focus-within .faq-steps__item {
  border-color: var(--lime-line);
  background: var(--faq-step-glow);
  color: var(--text-main);
}

.page-faq .faq-steps:hover .faq-steps__item:nth-child(1) { transition-delay: 0ms; }
.page-faq .faq-steps:hover .faq-steps__item:nth-child(2) { transition-delay: 90ms; }
.page-faq .faq-steps:hover .faq-steps__item:nth-child(3) { transition-delay: 180ms; }

/* ---------- 结尾通道 ---------- */
.page-faq .faq-cta {
  padding-block: clamp(36px, 5vw, 68px) clamp(48px, 6vw, 84px);
}

.page-faq .faq-cta__inner {
  display: grid;
  gap: 28px;
  padding: clamp(22px, 3.6vw, 40px);
  border: 1px solid var(--lime-line);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(180deg, rgba(182, 255, 60, 0.06), transparent 62%),
    var(--bg-carbon);
  box-shadow: var(--shadow-float);
}

.page-faq .faq-cta__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.375rem, 2.8vw, 1.875rem);
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin: 10px 0 14px;
  color: var(--text-main);
}

.page-faq .faq-cta__text > p {
  margin: 0 0 20px;
  color: var(--text-soft);
  line-height: 1.78;
  max-width: 40em;
}

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

.page-faq .faq-cta__aside {
  border-top: 1px solid var(--line);
  padding-top: 20px;
}

.page-faq .faq-cta__aside-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--accent-blue);
  margin: 0 0 14px;
}

.page-faq .faq-cta__tips {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-cta__tips li {
  position: relative;
  padding-left: 18px;
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--text-soft);
}

.page-faq .faq-cta__tips li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 2px;
  background: var(--accent-lime);
}

.page-faq .faq-cta__aside .note a {
  color: var(--accent-blue);
  text-underline-offset: 3px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-visual {
    grid-template-columns: minmax(0, 240px) minmax(0, 1fr);
    align-items: center;
    gap: 28px;
  }
  .page-faq .faq-visual__figure img {
    max-width: 100%;
    margin-inline: 0;
  }
  .page-faq .faq-item > summary {
    padding: 19px 22px;
  }
  .page-faq .faq-item__body {
    padding: 0 22px 20px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: 262px minmax(0, 1fr);
    gap: clamp(36px, 4.4vw, 58px);
  }
  .page-faq .faq-index {
    position: sticky;
    top: 96px;
  }
  .page-faq .faq-cta__inner {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }
  .page-faq .faq-cta__aside {
    border-top: 0;
    border-left: 1px solid var(--line);
    padding-top: 0;
    padding-left: 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__link,
  .page-faq .faq-item,
  .page-faq .faq-item__arrow,
  .page-faq .faq-steps__item {
    transition-duration: 1ms;
  }
  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    transform: none;
  }
}