.page-faq {
  --faq-aside-w: 296px;
  --faq-band: var(--moss);
  display: block;
  padding-block: clamp(18px, 4vw, 36px) clamp(56px, 9vw, 120px);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  border-bottom: 1px solid var(--hairline);
  padding-bottom: 26px;
  margin-bottom: 38px;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(28px, 7.2vw, 50px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--paper);
  margin: 10px 0 16px;
  max-width: 22ch;
}

.page-faq .faq-hero-lead {
  max-width: 64ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--text-muted);
}

.page-faq .faq-jump {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  margin: 22px 0 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-jump li {
  flex: 0 0 auto;
  scroll-snap-align: start;
}

.page-faq .faq-jump .chip {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding-inline: 14px;
  white-space: nowrap;
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

/* ---------- 主栏 + 右侧入口 ---------- */

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

.page-faq .faq-main {
  min-width: 0;
}

/* ---------- 分组 ---------- */

.page-faq .faq-group {
  position: relative;
  padding-left: 18px;
  margin-bottom: 42px;
  scroll-margin-top: calc(var(--header-h) + 16px);
}

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

.page-faq .faq-group::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 0;
  width: 3px;
  border-radius: 2px;
  background: var(--faq-band);
  opacity: 0.4;
  transition: opacity 0.3s var(--ease);
}

.page-faq .faq-group.is-active::before {
  opacity: 1;
}

.page-faq #group-subscribe { --faq-band: var(--moss); }
.page-faq #group-live { --faq-band: var(--cyan); }
.page-faq #group-data { --faq-band: var(--clay); }
.page-faq #group-device { --faq-band: var(--cyan-soft); }
.page-faq #group-support { --faq-band: var(--moss); }

.page-faq .faq-group-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 4px 12px;
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--hairline);
}

.page-faq .faq-num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1;
  color: var(--ink-deep);
  background: var(--faq-band);
  border-radius: var(--radius-sm);
  padding: 6px 8px 5px;
}

.page-faq .faq-group-title {
  font-family: var(--font-display);
  font-size: clamp(20px, 3.6vw, 26px);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.2;
  color: var(--paper);
  margin: 0;
}

.page-faq .faq-group-note {
  grid-column: 2;
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-faint);
}

/* ---------- 问题手风琴 ---------- */

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

.page-faq .faq-item {
  background: var(--glass);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color 0.24s var(--ease), background-color 0.24s var(--ease);
}

.page-faq .faq-item:hover,
.page-faq .faq-item[open] {
  border-color: var(--hairline-strong);
}

.page-faq .faq-item[open] {
  background: var(--panel);
}

.page-faq .faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-height: 44px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--paper);
}

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

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

.page-faq .faq-q-icon {
  position: relative;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
}

.page-faq .faq-q-icon::before,
.page-faq .faq-q-icon::after {
  content: "";
  position: absolute;
  background: var(--faq-band);
  transition: transform 0.22s var(--ease), opacity 0.22s var(--ease);
}

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

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

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

.page-faq .faq-a {
  padding: 13px 16px 16px;
  border-top: 1px solid var(--hairline);
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--text-muted);
}

.page-faq .faq-a p {
  margin: 0 0 8px;
}

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

.page-faq .faq-a strong {
  color: var(--cyan-soft);
  font-weight: 600;
}

/* ---------- 配图 ---------- */

.page-faq .faq-figure {
  margin: 18px 0 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.page-faq .faq-figure .media-caption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  line-height: 1.6;
  color: var(--text-faint);
}

/* ---------- 右侧入口 ---------- */

.page-faq .faq-aside {
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 20px;
}

.page-faq .faq-aside-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cyan-soft);
}

.page-faq .faq-aside-links {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-aside-links a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--paper);
  text-decoration: none;
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-aside-links a:hover {
  background: var(--panel-2);
  border-color: var(--hairline);
}

.page-faq .faq-aside-card {
  border-top: 1px solid var(--hairline);
  padding-top: 18px;
}

.page-faq .faq-aside-card-title {
  margin: 0 0 6px;
  font-size: 14px;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-aside-card-text {
  margin: 0 0 14px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--text-muted);
}

.page-faq .faq-aside-card .btn {
  width: 100%;
}

/* ---------- 桌面端 ---------- */

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 1fr) var(--faq-aside-w);
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-aside {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }

  .page-faq .faq-group {
    padding-left: 24px;
    margin-bottom: 54px;
  }

  .page-faq .faq-group-head {
    position: sticky;
    top: calc(var(--header-h) + 8px);
    z-index: 2;
    background: var(--ink);
    padding-top: 12px;
    margin-top: -12px;
  }

  .page-faq .faq-group-title {
    font-size: 27px;
  }
}

@media (min-width: 1240px) {
  .page-faq .faq-hero-lead {
    font-size: 15.5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-group::before,
  .page-faq .faq-item,
  .page-faq .faq-q-icon::before,
  .page-faq .faq-q-icon::after,
  .page-faq .faq-aside-links a {
    transition: none;
  }
}
</final>