.page-faq {
  background: var(--ink);
  color: var(--text);
  padding-bottom: 80px;
}

.page-faq .crumbs {
  padding-top: 20px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: 26px;
  padding: 22px 0 8px;
}

.page-faq .faq-hero-text .panel-label {
  margin-bottom: 14px;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(30px, 6.4vw, 52px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  margin: 0 0 18px;
  max-width: 20ch;
}

.page-faq .faq-lead {
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.78;
  margin: 0;
  max-width: 44ch;
}

.page-faq .faq-hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
}

.page-faq .faq-hero-stats li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 0.8125rem;
  color: var(--muted);
}

.page-faq .faq-hero-stats .stat-num {
  font-family: var(--font-mono);
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--signal);
  line-height: 1;
}

.page-faq .faq-hero-media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--panel);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
  overflow: hidden;
}

.page-faq .faq-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

/* ---------- 双栏骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: 30px;
  padding-top: 46px;
}

/* ---------- 左侧编号目录 ---------- */
.page-faq .faq-index-title {
  font-family: var(--font-head);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--muted);
  margin: 0 0 12px;
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-index-list li {
  flex: 0 0 auto;
}

.page-faq .faq-index-list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 13px;
  white-space: nowrap;
  font-size: 0.9375rem;
  line-height: 1.4;
  color: var(--muted);
  text-decoration: none;
  background: var(--panel);
  border: 1px solid var(--line);
  clip-path: polygon(9px 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%, 0 9px);
  transition: color var(--ease), background var(--ease), border-color var(--ease);
}

.page-faq .faq-index-num {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--signal);
}

.page-faq .faq-index-list a:hover,
.page-faq .faq-index-list a:focus-visible {
  color: var(--text);
  border-color: var(--signal);
  background: rgba(200, 255, 61, 0.08);
}

.page-faq .faq-index-list a:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

.page-faq .faq-index-hint {
  display: none;
}

/* ---------- 问题组 ---------- */
.page-faq .faq-group + .faq-group {
  margin-top: 46px;
  padding-top: 42px;
  border-top: 1px dashed var(--line);
}

.page-faq .faq-group-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 10px;
}

.page-faq .faq-group-num {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 46px;
  height: 30px;
  padding: 0 10px;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--ink);
  background: var(--signal);
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
}

.page-faq .faq-group-title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(21px, 3.6vw, 28px);
  line-height: 1.25;
  margin: 0;
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 17px 2px 17px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.55;
  color: var(--text);
  transition: color var(--ease);
}

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

.page-faq .faq-item summary::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--signal);
  line-height: 1.3;
}

.page-faq .faq-item[open] summary::after {
  content: "−";
}

.page-faq .faq-item summary:hover {
  color: var(--signal);
}

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

.page-faq .faq-a {
  border-left: 3px solid var(--signal);
  padding: 2px 0 20px 16px;
  margin-bottom: 4px;
}

.page-faq .faq-a p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9375rem;
  line-height: 1.8;
  max-width: 52ch;
}

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

/* ---------- 指标信息图 ---------- */
.page-faq .faq-figure {
  margin: 26px 0 0;
  padding: 20px;
  background: var(--panel);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 320px;
  height: auto;
  margin: 0 auto 20px;
  border: 1px solid var(--line);
}

.page-faq .faq-figure-title {
  font-family: var(--font-head);
  font-size: 1.125rem;
  font-weight: 700;
  margin: 0 0 14px;
  color: var(--text);
}

.page-faq .faq-metric-list {
  margin: 0;
  display: grid;
  gap: 10px 24px;
}

.page-faq .faq-metric-list > div {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding-bottom: 9px;
  border-bottom: 1px dashed var(--line);
}

.page-faq .faq-metric-list dt {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--signal);
}

.page-faq .faq-metric-list dd {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero-stats {
    gap: 14px 34px;
  }

  .page-faq .faq-figure {
    display: grid;
    grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
    gap: 28px;
    align-items: start;
    padding: 24px;
  }

  .page-faq .faq-figure img {
    margin: 0;
    max-width: 100%;
  }

  .page-faq .faq-metric-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 桌面双栏 ---------- */
@media (min-width: 960px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: end;
    gap: 44px;
    padding: 34px 0 14px;
  }

  .page-faq .faq-layout {
    grid-template-columns: 264px minmax(0, 1fr);
    gap: 52px;
    padding-top: 58px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 20px);
    align-self: start;
    padding-right: 20px;
    border-right: 1px solid var(--line);
  }

  .page-faq .faq-index-list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
  }

  .page-faq .faq-index-list li {
    flex: 0 1 auto;
  }

  .page-faq .faq-index-list a {
    border: 0;
    border-left: 2px solid var(--line);
    background: none;
    clip-path: none;
    padding: 11px 12px;
    white-space: normal;
  }

  .page-faq .faq-index-list a:hover,
  .page-faq .faq-index-list a:focus-visible {
    background: rgba(200, 255, 61, 0.06);
    border-left-color: var(--signal);
  }

  .page-faq .faq-index-hint {
    display: block;
    margin: 18px 0 0;
    padding-left: 12px;
    font-size: 0.8125rem;
    line-height: 1.7;
    color: var(--muted);
  }

  .page-faq .faq-item summary {
    font-size: 1.125rem;
    padding: 19px 2px 19px 0;
  }
}