.page-faq {
  background: var(--paper-100);
  color: var(--graphite-900);
}

/* ---------- 首屏：拼贴式左右分屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink-900);
  color: var(--paper-100);
  padding-bottom: clamp(38px, 6vw, 64px);
}

.page-faq .faq-hero.bleed-top {
  padding-top: calc(var(--header-h) + clamp(28px, 6vw, 60px));
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(43, 230, 200, 0.06) 0 1px, transparent 1px 76px),
    repeating-linear-gradient(0deg, rgba(201, 191, 166, 0.06) 0 1px, transparent 1px 76px);
}

.page-faq .faq-hero > .shell {
  position: relative;
  z-index: 1;
}

.page-faq .faq-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--fog-500);
  margin-bottom: clamp(22px, 4vw, 36px);
}

.page-faq .faq-breadcrumb a {
  color: var(--cyan-400);
  text-decoration: none;
}

.page-faq .faq-breadcrumb a:hover {
  text-decoration: underline;
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: 30px;
}

.page-faq .faq-hero-lead .kicker {
  color: var(--cyan-400);
}

.page-faq .faq-hero-lead h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(30px, 5.4vw, 46px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin: 10px 0 0;
  color: var(--paper-100);
}

.page-faq .faq-hero-text {
  margin: 16px 0 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.72;
  color: rgba(243, 239, 228, 0.82);
}

.page-faq .faq-hero-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(201, 191, 166, 0.24);
  border: var(--line-dark);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-faq .faq-fact {
  background: var(--ink-700);
  padding: 16px 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-faq .faq-fact-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 30px;
  line-height: 1;
  color: var(--amber-500);
  letter-spacing: -0.02em;
}

.page-faq .faq-fact-cap {
  font-size: 12.5px;
  line-height: 1.55;
  color: rgba(243, 239, 228, 0.76);
}

/* ---------- 主体：左导航 + 右问答流 ---------- */
.page-faq .faq-body {
  padding: 0;
}

.page-faq .faq-layout {
  display: grid;
  gap: 34px;
  padding-top: clamp(34px, 6vw, 60px);
  padding-bottom: clamp(44px, 7vw, 80px);
}

.page-faq .faq-side-title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fog-500);
}

.page-faq .faq-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.page-faq .faq-filters .filter-btn {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14.5px;
  line-height: 1;
  padding: 9px 15px;
  border: 1px solid var(--sand-300);
  border-radius: 999px;
  background: transparent;
  color: var(--graphite-900);
  cursor: pointer;
  transition: background-color 0.16s var(--ease), border-color 0.16s var(--ease), color 0.16s var(--ease);
}

.page-faq .faq-filters .filter-btn:hover {
  border-color: var(--ink-700);
}

.page-faq .faq-filters .filter-btn[aria-pressed="true"] {
  background: var(--cyan-400);
  border-color: var(--cyan-400);
  color: var(--ink-900);
}

.page-faq .faq-count {
  margin: 0 0 18px;
  font-size: 13px;
  color: var(--fog-500);
}

.page-faq .faq-count .filter-count {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
  color: var(--amber-500);
  font-weight: 700;
}

.page-faq .faq-toc {
  display: grid;
  gap: 2px;
  padding: 14px 0 0;
  border-top: var(--line-sand);
  margin-bottom: 22px;
}

.page-faq .faq-toc a {
  display: block;
  padding: 8px 10px;
  font-size: 14.5px;
  color: var(--ink-700);
  text-decoration: none;
  border-left: 3px solid transparent;
  transition: border-color 0.16s var(--ease), background-color 0.16s var(--ease);
}

.page-faq .faq-toc a:hover,
.page-faq .faq-toc a:focus-visible {
  border-left-color: var(--cyan-400);
  background: var(--paper-200);
}

.page-faq .faq-side-media {
  margin: 0;
  border: var(--line-sand);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--paper-200);
}

.page-faq .faq-side-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-side-media .media-caption {
  display: block;
  padding: 10px 14px 12px;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--fog-500);
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-section {
  margin-bottom: clamp(38px, 6vw, 66px);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-section:last-of-type {
  margin-bottom: 18px;
}

.page-faq .faq-section-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--ink-900);
  margin-bottom: 4px;
}

.page-faq .faq-section-index {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--amber-500);
  flex: none;
}

.page-faq .faq-section-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(21px, 3.6vw, 27px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--graphite-900);
}

.page-faq .faq-item {
  position: relative;
  border-bottom: var(--line-sand);
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  bottom: 10px;
  width: 3px;
  border-radius: 2px;
  background: var(--cyan-400);
  opacity: 0;
  transition: opacity 0.18s var(--ease);
}

.page-faq .faq-item[open]::before {
  opacity: 1;
}

.page-faq .faq-item > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 6px 18px 16px;
  transition: background-color 0.16s var(--ease);
}

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

.page-faq .faq-item > summary:hover {
  background: rgba(229, 222, 203, 0.5);
}

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: -2px;
}

.page-faq .faq-q {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2.6vw, 19px);
  line-height: 1.38;
  letter-spacing: -0.005em;
  color: var(--graphite-900);
}

.page-faq .faq-marker {
  flex: none;
  position: relative;
  width: 18px;
  height: 18px;
  margin-top: 4px;
}

.page-faq .faq-marker::before,
.page-faq .faq-marker::after {
  content: "";
  position: absolute;
  background: var(--fog-500);
  transition: transform 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-faq .faq-marker::before {
  left: 0;
  right: 0;
  top: 8px;
  height: 2px;
}

.page-faq .faq-marker::after {
  top: 0;
  bottom: 0;
  left: 8px;
  width: 2px;
}

.page-faq .faq-item[open] .faq-marker::before {
  background: var(--cyan-400);
}

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

.page-faq .faq-a {
  margin: 0 6px 18px 16px;
  padding: 15px 18px;
  background: var(--paper-200);
  border-radius: var(--radius-sm);
  font-size: 15.5px;
  line-height: 1.72;
  color: var(--graphite-900);
}

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

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

.page-faq .faq-copy {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
}

.page-faq .faq-copy-status {
  font-size: 13px;
  color: var(--ink-700);
}

/* ---------- 数据章节配图 ---------- */
.page-faq .faq-data-figure {
  margin: 26px 0 0;
  border: var(--line-sand);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--paper-200);
}

.page-faq .faq-data-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-data-figure .media-caption {
  display: block;
  padding: 12px 16px 14px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--fog-500);
  border-top: var(--line-sand);
}

/* ---------- 结尾转化卡 ---------- */
.page-faq .faq-help-card {
  margin-top: 24px;
  padding: 22px 20px;
  background: var(--ink-900);
  border-radius: var(--radius-md);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.page-faq .faq-help-text {
  margin: 0;
  max-width: 40ch;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(243, 239, 228, 0.86);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-faq .faq-hero-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-toc {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2px 6px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: 44px;
  }

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

  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 52px;
    align-items: start;
  }

  .page-faq .faq-side-sticky {
    position: sticky;
    top: calc(var(--header-h) + 26px);
  }

  .page-faq .faq-toc {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-item > summary {
    padding: 20px 10px 20px 20px;
  }

  .page-faq .faq-a {
    margin: 0 10px 20px 20px;
    padding: 16px 20px;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item::before,
  .page-faq .faq-item > summary,
  .page-faq .faq-marker::before,
  .page-faq .faq-marker::after,
  .page-faq .faq-filters .filter-btn,
  .page-faq .faq-toc a {
    transition: none;
  }
}