.page-faq {
  --faq-side: 264px;
  padding-top: var(--header-h);
  background:
    radial-gradient(120% 58% at 86% 0%, rgba(255, 90, 46, 0.15), transparent 60%),
    radial-gradient(92% 52% at 4% 3%, rgba(20, 224, 192, 0.13), transparent 64%);
  background-repeat: no-repeat;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-masthead {
  padding: 26px 0 44px;
}

.page-faq .faq-masthead-grid {
  display: grid;
  gap: 30px;
  align-items: end;
}

.page-faq .faq-masthead-copy .breadcrumb {
  margin-bottom: 22px;
}

.page-faq .faq-title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.05rem, 6.4vw, 3.5rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-lead {
  margin: 18px 0 0;
  max-width: 48ch;
  font-size: 16px;
  line-height: 1.82;
  color: var(--muted);
}

.page-faq .faq-hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 30px;
  margin: 28px 0 0;
  padding: 18px 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-faq .faq-stat {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.page-faq .faq-stat-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 25px;
  font-weight: 600;
  line-height: 1.1;
  color: var(--cyan);
}

.page-faq .faq-stat-label {
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--muted);
}

.page-faq .faq-masthead-media {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--glass-line);
  border-radius: var(--radius-l);
  background: var(--ink-2);
  box-shadow: var(--shadow-cyan);
}

.page-faq .faq-masthead-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 7 / 4;
  object-fit: cover;
}

/* ---------- 双栏 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: 36px;
}

.page-faq .faq-side-inner {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-faq .faq-index {
  display: flex;
  flex-direction: column;
  margin-top: 4px;
}

.page-faq .faq-index-link {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 10px 4px 10px 14px;
  border-left: 2px solid var(--line);
  font-size: 14.5px;
  line-height: 1.5;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  color: var(--cyan-soft);
  border-left-color: var(--cyan);
  background: var(--glass);
  outline: none;
}

.page-faq .faq-index-link:focus-visible {
  box-shadow: inset 2px 0 0 var(--cyan);
}

.page-faq .faq-index-link[aria-current="true"],
.page-faq .faq-index-link[aria-current="location"] {
  color: var(--paper);
  border-left-color: var(--pulse);
  background: rgba(255, 90, 46, 0.07);
}

.page-faq .faq-index-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--pulse);
}

.page-faq .faq-side-help {
  margin-top: 10px;
  padding: 18px;
  border-radius: var(--radius);
  background: var(--ink-3);
}

.page-faq .faq-side-help-text {
  margin: 0 0 14px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 筛选 ---------- */
.page-faq .faq-filter-wrap {
  margin-bottom: 34px;
}

.page-faq .faq-filter {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: none;
}

.page-faq .faq-filter::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-filter .filter-btn {
  flex: 0 0 auto;
}

.page-faq .faq-filter-count {
  margin: 14px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  margin-top: 44px;
  padding-top: 42px;
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h) + 28px);
}

.page-faq .faq-stream > .faq-group:first-of-type {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.page-faq .faq-group-head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 14px;
  align-items: baseline;
  margin-bottom: 8px;
}

.page-faq .faq-group-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--pulse);
}

.page-faq .faq-group-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.3rem, 4.2vw, 1.8rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-group-note {
  grid-column: 2;
  margin: 0;
  max-width: 52ch;
  font-family: var(--font-serif);
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 条目 ---------- */
.page-faq .faq-items {
  margin-top: 18px;
}

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

.page-faq .faq-item:first-child {
  border-top: 1px solid var(--line);
}

.page-faq .faq-q {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  justify-content: space-between;
  padding: 18px 4px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16.5px;
  line-height: 1.62;
  color: var(--paper);
  transition: color 0.18s var(--ease);
}

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

.page-faq .faq-q:hover {
  color: var(--cyan-soft);
}

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

.page-faq .faq-q-icon {
  position: relative;
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  margin-top: 3px;
  border: 1px solid var(--glass-line);
  border-radius: 50%;
  background: var(--glass);
  transition: transform 0.24s var(--ease), border-color 0.24s var(--ease), background 0.24s var(--ease);
}

.page-faq .faq-q-icon::before,
.page-faq .faq-q-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--cyan);
  transform: translate(-50%, -50%);
  transition: opacity 0.24s var(--ease), transform 0.24s var(--ease);
}

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

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

.page-faq .faq-item[open] .faq-q-icon {
  border-color: var(--cyan);
  background: var(--glass-strong);
  transform: rotate(180deg);
}

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

.page-faq .faq-a {
  max-width: 68ch;
  padding: 0 4px 22px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--muted);
}

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

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

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

.page-faq .faq-a a {
  color: var(--cyan-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

.page-faq .faq-code {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.93em;
  color: var(--cyan-soft);
  background: var(--glass);
  border-radius: 6px;
  padding: 1px 6px;
  overflow-wrap: anywhere;
}

.page-faq .faq-item[open] .faq-a {
  animation: faq-unfold 0.26s var(--ease) both;
}

@keyframes faq-unfold {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 28px 0 0;
  overflow: hidden;
  border: 1px solid var(--glass-line);
  border-radius: var(--radius);
  background: var(--ink-2);
}

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

.page-faq .faq-figure figcaption {
  padding: 12px 16px 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

/* ---------- 快捷入口条 ---------- */
.page-faq .faq-shortcut {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
  align-items: center;
  margin-top: 26px;
  padding: 14px 18px;
  border: 1px solid var(--cyan);
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(20, 224, 192, 0.15), rgba(20, 224, 192, 0));
  color: var(--paper);
  font-size: 14.5px;
  line-height: 1.6;
  text-decoration: none;
  transition: background 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-faq .faq-shortcut:hover,
.page-faq .faq-shortcut:focus-visible {
  background: linear-gradient(90deg, rgba(20, 224, 192, 0.26), rgba(20, 224, 192, 0.05));
  transform: translateX(3px);
  outline: none;
}

.page-faq .faq-shortcut:focus-visible {
  box-shadow: 0 0 0 2px var(--ink), 0 0 0 4px var(--cyan);
}

.page-faq .faq-shortcut-tag {
  flex: 0 0 auto;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--cyan);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
}

.page-faq .faq-shortcut-text {
  flex: 1 1 220px;
  color: var(--cyan-soft);
}

.page-faq .faq-shortcut-arrow {
  flex: 0 0 auto;
  color: var(--cyan);
  font-family: var(--font-mono);
}

/* ---------- 结尾 ---------- */
.page-faq .faq-closing {
  margin-top: 32px;
  padding: 26px 22px 24px;
  border-radius: var(--radius);
  background: var(--ink-3);
}

.page-faq .faq-closing-text {
  margin: 0 0 18px;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-closing-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-masthead {
    padding: 34px 0 52px;
  }

  .page-faq .faq-masthead-media img {
    aspect-ratio: 16 / 9;
  }

  .page-faq .faq-q {
    font-size: 17px;
    padding: 20px 4px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-masthead-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: 52px;
  }

  .page-faq .faq-masthead-media img {
    aspect-ratio: 7 / 5;
  }

  .page-faq .faq-filter {
    flex-wrap: wrap;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-figure {
    margin-top: 32px;
  }

  .page-faq .faq-figure img {
    aspect-ratio: 21 / 9;
  }
}

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

  .page-faq .faq-side-inner {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item[open] .faq-a {
    animation: none;
  }

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

  .page-faq .faq-q-icon {
    transition: none;
  }
}