.page-faq {
  --faq-block: clamp(64px, 8vw, 104px);
  --faq-gap: clamp(18px, 2.6vw, 30px);
  background: var(--paper);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(40px, 6vw, 76px) clamp(28px, 4vw, 44px);
}

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

.page-faq .faq-hero-numeral {
  position: absolute;
  top: -0.08em;
  right: -0.02em;
  z-index: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(200px, 46vw, 460px);
  line-height: 0.78;
  color: var(--gold-soft);
  opacity: 0.5;
  pointer-events: none;
  user-select: none;
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  align-items: end;
  margin-top: clamp(18px, 2.4vw, 26px);
}

.page-faq .faq-hero-copy h1 {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 6.2vw, 66px);
  line-height: 1.1;
  letter-spacing: -0.012em;
  transform: scaleX(0.96);
  transform-origin: left center;
  max-width: 16em;
}

.page-faq .faq-hero-copy .section-lead {
  margin-top: 18px;
}

.page-faq .faq-hero-aside {
  padding: clamp(20px, 2.6vw, 28px);
  background: var(--ink);
  border-radius: var(--r-lg);
  color: var(--paper);
}

.page-faq .faq-hero-aside-title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-faq .faq-hero-stats {
  display: grid;
  gap: 15px;
  margin: 0;
}

.page-faq .faq-hero-stat dt {
  margin-bottom: 4px;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: rgba(245, 241, 232, 0.7);
}

.page-faq .faq-hero-stat dd {
  margin: 0;
  font-family: var(--font-display);
  font-size: 14.5px;
  color: var(--paper);
}

.page-faq .faq-stat-num {
  margin-right: 8px;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 23px;
  color: var(--gold);
}

@media (min-width: 880px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(250px, 0.55fr);
  }
}

@media (max-width: 640px) {
  .page-faq .faq-hero-numeral {
    top: -0.12em;
    font-size: 210px;
    opacity: 0.38;
  }
}

/* ---------- 高频四问 ---------- */
.page-faq .faq-lead-questions {
  padding-block: clamp(48px, 6vw, 80px);
}

.page-faq .faq-top-stack {
  display: grid;
  gap: 14px;
  margin-top: clamp(24px, 3vw, 38px);
}

.page-faq .faq-top-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: 14px 18px;
  padding: clamp(18px, 2.4vw, 28px);
  border-radius: var(--r-md);
  transition: border-color var(--t) var(--ease), transform var(--t) var(--ease);
}

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

.page-faq .faq-top-card .index-chip {
  margin-top: 3px;
}

.page-faq .faq-top-q {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2.1vw, 21px);
  line-height: 1.4;
  color: var(--ink);
}

.page-faq .faq-top-a {
  margin: 0 0 14px;
  font-family: var(--font-body);
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--graphite);
  max-width: 38em;
}

.page-faq .faq-top-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding-bottom: 2px;
  font-family: var(--font-display);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1.5px solid var(--gold);
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease);
}

.page-faq .faq-top-link::after {
  content: "↓";
  font-size: 12px;
  line-height: 1;
}

.page-faq .faq-top-link:hover,
.page-faq .faq-top-link:focus-visible {
  color: var(--brick);
  border-color: var(--brick);
}

/* ---------- 问答库 ---------- */
.page-faq .faq-library {
  padding-block: clamp(48px, 6vw, 96px) clamp(64px, 8vw, 112px);
}

.page-faq .faq-filter {
  margin: clamp(20px, 2.6vw, 30px) 0 clamp(28px, 3.6vw, 44px);
}

.page-faq .faq-layout {
  display: grid;
  gap: clamp(30px, 4vw, 52px);
}

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

.page-faq .faq-group {
  scroll-margin-top: 120px;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(44px, 5.4vw, 72px);
  padding-top: clamp(36px, 4.4vw, 56px);
  border-top: 1px solid var(--hair);
}

.page-faq .faq-group-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: clamp(18px, 2.4vw, 26px);
}

.page-faq .faq-group-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(21px, 2.8vw, 30px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-group-figure {
  margin: 0 0 clamp(20px, 2.6vw, 30px);
}

/* 折叠条目 */
.page-faq .faq-item {
  background: var(--card);
  border: 1px solid var(--hair);
  border-radius: var(--r-md);
  transition: border-color var(--t) var(--ease), box-shadow var(--t) var(--ease);
}

.page-faq .faq-item + .faq-item {
  margin-top: 12px;
}

.page-faq .faq-item[open] {
  border-color: var(--gold);
  box-shadow: 0 20px 44px -34px rgba(14, 42, 71, 0.55);
}

.page-faq .faq-q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 16px clamp(16px, 2vw, 22px);
  list-style: none;
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.5;
  color: var(--ink);
}

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

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

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

.page-faq .faq-q-index {
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--ink-mist);
}

.page-faq .faq-q-toggle {
  position: relative;
  width: 24px;
  height: 24px;
  flex: none;
  border-radius: var(--r-pill);
  background: var(--gold-soft);
  transition: background var(--t) var(--ease);
}

.page-faq .faq-q-toggle::before,
.page-faq .faq-q-toggle::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 11px;
  height: 1.6px;
  border-radius: 2px;
  background: var(--ink);
  transform: translate(-50%, -50%);
}

.page-faq .faq-q-toggle::after {
  transform: translate(-50%, -50%) rotate(90deg);
  transition: transform var(--t) var(--ease), opacity var(--t) var(--ease);
}

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

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

.page-faq .faq-a {
  padding: 0 clamp(16px, 2vw, 22px) clamp(18px, 2.2vw, 24px);
}

.page-faq .faq-a p {
  max-width: 38em;
  margin: 0;
  font-family: var(--font-body);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--graphite);
}

.page-faq .faq-a p + p {
  margin-top: 12px;
}

.page-faq .faq-a a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--gold);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
}

.page-faq .faq-a a:hover,
.page-faq .faq-a a:focus-visible {
  text-decoration-color: var(--brick);
}

@media (min-width: 620px) {
  .page-faq .faq-a {
    padding-left: calc(clamp(16px, 2vw, 22px) + 40px);
  }
}

/* 侧栏 */
.page-faq .faq-aside {
  display: grid;
  gap: 18px;
}

.page-faq .faq-aside-nav {
  padding: 20px 22px;
  background: var(--card);
  border: 1px solid var(--hair);
  border-radius: var(--r-md);
}

.page-faq .faq-aside-label {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--ink-mist);
}

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

.page-faq .faq-aside-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 10px;
  border-radius: var(--r-sm);
  font-family: var(--font-display);
  font-size: 14.5px;
  line-height: 1.5;
  color: var(--ink);
  text-decoration: none;
  transition: background var(--t) var(--ease), color var(--t) var(--ease);
}

.page-faq .faq-aside-link:hover,
.page-faq .faq-aside-link:focus-visible {
  background: var(--gold-soft);
}

.page-faq .faq-aside-num {
  font-size: 11px;
  color: var(--ink-mist);
}

.page-faq .faq-aside-card {
  padding: 22px;
  border-radius: var(--r-md);
  background: var(--ink-deep);
  color: var(--paper);
}

.page-faq .faq-aside-card-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--paper);
}

.page-faq .faq-aside-card-text {
  margin: 0 0 18px;
  font-family: var(--font-body);
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(245, 241, 232, 0.82);
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: start;
  }

  .page-faq .faq-aside {
    position: sticky;
    top: 112px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-top-card,
  .page-faq .faq-item,
  .page-faq .faq-q-toggle,
  .page-faq .faq-q-toggle::after,
  .page-faq .faq-aside-link,
  .page-faq .faq-top-link {
    transition: none;
  }

  .page-faq .faq-top-card:hover {
    transform: none;
  }
}