.page-faq {
  --faq-radius: 3px;
  --faq-sheen: rgba(56, 225, 200, 0.16);
  --faq-gold-line: rgba(233, 185, 73, 0.24);
  padding: 0 var(--pad) 96px;
  font-family: var(--font-sans);
  color: var(--text);
}

.page-faq .faq-wrap {
  max-width: var(--shell);
  margin: 0 auto;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 34px 0 26px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 88px;
  height: 2px;
  background: var(--cyan);
}

.page-faq .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-faq .breadcrumbs a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.page-faq .breadcrumbs a:hover,
.page-faq .breadcrumbs a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-faq .faq-title {
  margin: 22px 0 0;
  max-width: 18em;
  font-size: clamp(30px, 5.6vw, 52px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-faq .faq-title em {
  font-style: normal;
  color: var(--cyan);
}

.page-faq .faq-lede {
  margin: 20px 0 0;
  max-width: 48em;
  font-size: 16.5px;
  line-height: 1.9;
  color: var(--muted);
}

.page-faq .faq-meta-line {
  margin: 24px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 2;
  color: var(--muted);
}

.page-faq .meta-key {
  color: var(--gold-soft);
}

.page-faq .meta-sep {
  margin: 0 8px;
  color: var(--line);
}

/* ---------- 筛选条 ---------- */
.page-faq .filter-bar {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .filter-btn {
  appearance: none;
  padding: 9px 15px;
  font-family: var(--font-sans);
  font-size: 13.5px;
  line-height: 1;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--faq-radius);
  cursor: pointer;
  transition: color 0.22s, border-color 0.22s, background 0.22s, box-shadow 0.22s, transform 0.22s;
}

.page-faq .filter-btn:hover {
  color: var(--text);
  border-color: var(--cyan-dim);
  transform: translateY(-1px);
}

.page-faq .filter-btn:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .filter-btn.is-active {
  color: #F4EFFF;
  background: var(--violet);
  border-color: var(--violet);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.18);
}

/* ---------- 章节跳转 ---------- */
.page-faq .chapter-jump {
  margin-top: 32px;
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding-bottom: 10px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}

.page-faq .chapter-jump::-webkit-scrollbar {
  height: 4px;
}

.page-faq .chapter-jump::-webkit-scrollbar-thumb {
  background: var(--line);
  border-radius: 2px;
}

.page-faq .jump-item {
  flex: none;
  display: inline-flex;
  align-items: baseline;
  gap: 9px;
  padding: 10px 15px;
  text-decoration: none;
  background: var(--ink-card);
  border: 1px solid var(--line);
  border-radius: var(--faq-radius);
  color: var(--muted);
  font-size: 13.5px;
  transition: color 0.22s, border-color 0.22s, transform 0.22s, background 0.22s;
}

.page-faq .jump-item:hover,
.page-faq .jump-item:focus-visible {
  color: var(--text);
  border-color: var(--cyan);
  background: var(--ink-lift);
  transform: translateY(-2px);
}

.page-faq .jump-no {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--cyan);
}

/* ---------- 章节 ---------- */
.page-faq .faq-chapter {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  padding: 58px 0 10px;
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-hero + .faq-chapter {
  border-top: none;
  padding-top: 46px;
}

.page-faq .chapter-aside {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  position: relative;
}

.page-faq .chapter-no {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(44px, 8vw, 76px);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.04em;
  color: var(--ink-lift);
  -webkit-text-stroke: 1px var(--cyan-dim);
  text-stroke: 1px var(--cyan-dim);
}

.page-faq .chapter-title {
  margin: 14px 0 0;
  font-size: clamp(21px, 3.4vw, 29px);
  font-weight: 900;
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .chapter-lede {
  margin: 12px 0 0;
  max-width: 26em;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .chapter-note {
  margin-top: 20px;
  padding-left: 10px;
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.26em;
  color: var(--muted);
  opacity: 0.72;
  border-left: 1px solid var(--line);
}

/* ---------- 图片 ---------- */
.page-faq .chapter-media,
.page-faq .chapter-media.is-square {
  position: relative;
  margin: 0 0 20px;
  padding: 10px;
  background: var(--ink-card);
  border: 1px solid var(--line);
  border-radius: var(--faq-radius);
}

.page-faq .chapter-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--ink-lift);
}

.page-faq .chapter-media::after {
  content: "";
  position: absolute;
  inset: 10px;
  pointer-events: none;
  background: linear-gradient(118deg, var(--faq-sheen), transparent 44%);
}

.page-faq .chapter-media-wide {
  margin: 4px 0 22px;
  max-width: 460px;
  margin-left: auto;
  margin-right: auto;
}

.page-faq .chapter-media-wide .chapter-media {
  margin-bottom: 10px;
}

.page-faq .media-caption {
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-faq .chapter-media-wide .media-caption {
  text-align: center;
}

/* ---------- 问答卡 ---------- */
.page-faq .qa-item {
  position: relative;
  margin-bottom: 12px;
  background: var(--ink-card);
  border: 1px solid var(--line);
  border-radius: var(--faq-radius);
  transition: border-color 0.25s, box-shadow 0.25s, transform 0.25s, background 0.25s;
}

.page-faq .qa-item::before {
  content: "";
  position: absolute;
  left: -1px;
  top: -1px;
  width: 2px;
  height: 30%;
  background: var(--line);
  transition: height 0.4s cubic-bezier(0.4, 0, 0.2, 1), background 0.3s;
}

.page-faq .qa-item:hover {
  border-color: var(--cyan-dim);
  transform: translateY(-4px);
  box-shadow: 0 14px 30px -18px rgba(0, 0, 0, 0.9);
}

.page-faq .qa-item[open] {
  background: var(--ink-lift);
  border-color: var(--cyan-dim);
}

.page-faq .qa-item[open]::before {
  height: calc(100% + 2px);
  background: var(--cyan);
}

.page-faq .qa-q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 17px 46px 17px 20px;
  position: relative;
  cursor: pointer;
  list-style: none;
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.62;
  color: var(--text);
  transition: color 0.22s;
}

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

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

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

.page-faq .qa-mark {
  flex: none;
  width: 22px;
  height: 22px;
  margin-top: 3px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--deep);
  background: var(--cyan-dim);
  border-radius: 2px;
  transition: background 0.25s;
}

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

.page-faq .qa-text {
  min-width: 0;
}

.page-faq .qa-arrow {
  position: absolute;
  right: 20px;
  top: 24px;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted);
  transform: rotate(-45deg);
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.page-faq .qa-item[open] .qa-arrow {
  transform: rotate(45deg);
  border-color: var(--cyan);
}

.page-faq .qa-a {
  padding: 0 20px 22px 54px;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--muted);
  animation: faq-in 0.32s ease both;
}

@keyframes faq-in {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-a {
    animation: none;
  }
  .page-faq .qa-item,
  .page-faq .filter-btn,
  .page-faq .jump-item {
    transition: none;
  }
}

.page-faq .qa-a p {
  margin: 0 0 12px;
}

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

.page-faq .qa-a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-dim);
}

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

.page-faq .qa-lead {
  color: var(--text);
  font-weight: 700;
}

.page-faq .num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.1em;
  color: var(--gold);
}

.page-faq .qa-key {
  font-family: var(--font-mono);
  font-size: 0.92em;
  color: var(--gold-soft);
  background: rgba(233, 185, 73, 0.07);
  border: 1px solid var(--faq-gold-line);
  border-radius: 2px;
  padding: 1px 6px;
  white-space: nowrap;
}

/* ---------- 步骤 ---------- */
.page-faq .step-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .step-list li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  color: var(--text);
  font-size: 15px;
  line-height: 1.78;
}

.page-faq .step-no {
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 700;
  color: var(--gold);
  padding-top: 3px;
  border-right: 1px solid var(--line);
  padding-right: 8px;
  text-align: left;
}

/* ---------- 06 结尾卡 ---------- */
.page-faq .next-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-faq .next-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 52px 22px 22px;
  text-decoration: none;
  background: var(--ink-card);
  border: 1px solid var(--line);
  border-radius: var(--faq-radius);
  transition: border-color 0.25s, background 0.25s, transform 0.25s;
}

.page-faq .next-card:hover,
.page-faq .next-card:focus-visible {
  background: var(--ink-lift);
  border-color: var(--cyan);
  transform: translateY(-4px);
}

.page-faq .next-kicker {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-faq .next-title {
  font-size: 19px;
  font-weight: 900;
  line-height: 1.35;
  color: var(--text);
}

.page-faq .next-desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
  word-break: break-word;
}

.page-faq .next-arrow {
  position: absolute;
  right: 20px;
  top: 22px;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--cyan);
  transition: transform 0.25s;
}

.page-faq .next-card:hover .next-arrow {
  transform: translateX(4px);
}

.page-faq .back-line {
  margin: 26px 0 0;
}

.page-faq .back-line a {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
  transition: color 0.2s, border-color 0.2s;
}

.page-faq .back-line a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 720px) {
  .page-faq .next-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .next-card:last-child {
    grid-column: 1 / -1;
  }

  .page-faq .faq-meta-line {
    font-size: 13px;
  }
}

/* ---------- 桌面错层 ---------- */
@media (min-width: 960px) {
  .page-faq {
    padding-bottom: 120px;
  }

  .page-faq .faq-hero {
    padding: 52px 0 34px;
  }

  .page-faq .faq-chapter {
    grid-template-columns: minmax(0, 5fr) minmax(0, 8fr);
    column-gap: 56px;
    row-gap: 0;
    padding: 76px 0 12px;
    align-items: start;
  }

  .page-faq .faq-hero + .faq-chapter {
    padding-top: 58px;
  }

  .page-faq .chapter-aside {
    grid-column: 1;
    grid-row: 1;
    padding-top: 6px;
  }

  .page-faq .chapter-body {
    grid-column: 2;
    grid-row: 1;
    min-width: 0;
  }

  .page-faq .chapter-media-wide {
    grid-column: 1 / -1;
    grid-row: 2;
    margin: 40px auto 0;
  }

  /* 问答错落：偶数条目右移，与奇数条形成高度与位置的双重错层 */
  .page-faq details.qa-item:nth-of-type(even) {
    margin-left: 34px;
  }

  /* 章节整体错落：交替章节的左侧栏下移 */
  .page-faq .faq-chapter.offset-aside .chapter-aside {
    padding-top: 48px;
  }

  .page-faq .qa-q {
    font-size: 17px;
    padding: 19px 52px 19px 22px;
  }

  .page-faq .qa-a {
    padding: 0 26px 24px 56px;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-chapter {
    column-gap: 72px;
  }

  .page-faq details.qa-item:nth-of-type(even) {
    margin-left: 46px;
  }
}