/* ===== 常见问答 · 页面专属样式（作用域 .page-faq） ===== */

.page-faq {
  --faq-num-col: 3rem;
  --faq-col-gap: 18px;
}

/* —— 首屏 —— */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(88px, 13vw, 172px) 0 clamp(44px, 6vw, 92px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto -10%;
  height: 130%;
  background:
    radial-gradient(58% 46% at 78% 12%, rgba(201, 162, 74, 0.18), transparent 68%),
    linear-gradient(180deg, rgba(19, 29, 58, 0.88), rgba(11, 18, 38, 0) 74%);
  pointer-events: none;
}

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

.page-faq .breadcrumbs {
  margin-bottom: clamp(28px, 4vw, 52px);
}

.page-faq .faq-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(36px, 5vw, 68px);
}

@media (min-width: 1000px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
  }
}

.page-faq .faq-hero-kicker {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--gold);
  text-transform: uppercase;
}

.page-faq .faq-hero-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 5.2vw, 70px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--porcelain);
}

.page-faq .faq-hero-lead {
  margin: clamp(20px, 2.6vw, 30px) 0 0;
  max-width: 62ch;
  font-size: clamp(15.5px, 1.15vw, 18px);
  line-height: 1.85;
  color: var(--porcelain-dim);
}

.page-faq .faq-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--ink-600);
}

.page-faq .faq-fact {
  display: grid;
  grid-template-columns: 5rem minmax(0, 1fr);
  gap: 6px 18px;
  align-items: baseline;
  padding: 15px 0;
  border-bottom: 1px solid var(--ink-600);
}

.page-faq .faq-fact-num {
  font-family: var(--font-mono);
  font-size: 23px;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
  color: var(--gold);
}

.page-faq .faq-fact-text {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--porcelain-dim);
}

/* —— 快速处理 —— */
.page-faq .faq-quick-head {
  max-width: 740px;
}

.page-faq .faq-quick-kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cinnabar);
  text-transform: uppercase;
}

.page-faq .faq-quick-heading {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(25px, 3.4vw, 44px);
  line-height: 1.16;
  color: var(--ink-text);
}

.page-faq .faq-quick-lead {
  margin: 16px 0 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-text-dim);
}

.page-faq .faq-quick-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.2vw, 26px);
  margin-top: clamp(32px, 4.5vw, 60px);
}

@media (min-width: 820px) {
  .page-faq .faq-quick-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-faq .faq-quick-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(22px, 2.4vw, 32px);
  background: rgba(11, 18, 38, 0.04);
  border: 1px solid rgba(11, 18, 38, 0.12);
  border-top: 2px solid var(--cinnabar);
}

.page-faq .faq-quick-index {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--cinnabar);
}

.page-faq .faq-quick-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(19px, 1.5vw, 23px);
  line-height: 1.36;
  color: var(--ink-text);
}

.page-faq .faq-quick-text {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--ink-text-dim);
}

.page-faq .faq-quick-do {
  margin: auto 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--gold);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.65;
  color: var(--ink-text);
}

/* —— 问题索引条 —— */
.page-faq .faq-index {
  position: sticky;
  top: var(--header-h-scrolled);
  z-index: 6;
  background: rgba(19, 29, 58, 0.94);
  border-top: 1px solid var(--ink-600);
  border-bottom: 1px solid var(--ink-600);
  backdrop-filter: blur(12px);
}

.page-faq .faq-index-inner {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 26px);
  padding: 12px 0;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-faq .faq-index-label {
  flex: none;
  padding-right: clamp(10px, 1.6vw, 20px);
  border-right: 1px solid var(--ink-600);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-faq .faq-index-list {
  display: flex;
  align-items: center;
  gap: clamp(4px, 1.2vw, 14px);
  flex: 1 1 auto;
  min-width: 0;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-index-item {
  flex: none;
}

.page-faq .faq-index-link {
  display: block;
  padding: 6px 10px;
  white-space: nowrap;
  font-size: 14px;
  color: var(--porcelain-dim);
  text-decoration: none;
  border: 1px solid transparent;
  transition: color .16s var(--ease), border-color .16s var(--ease), background .16s var(--ease);
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  color: var(--gold-soft);
  border-color: var(--ink-600);
  background: rgba(201, 162, 74, 0.08);
}

.page-faq .faq-index-top {
  display: none;
  flex: none;
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(201, 162, 74, 0.45);
}

.page-faq .faq-index-top:hover,
.page-faq .faq-index-top:focus-visible {
  color: var(--gold-soft);
}

@media (min-width: 760px) {
  .page-faq .faq-index-top {
    display: block;
  }
}

/* —— 问答分组 —— */
.page-faq .faq-group {
  position: relative;
}

.page-faq .faq-group--tint {
  background: linear-gradient(
    180deg,
    rgba(19, 29, 58, 0) 0%,
    rgba(19, 29, 58, 0.78) 14%,
    rgba(19, 29, 58, 0.78) 86%,
    rgba(19, 29, 58, 0) 100%
  );
}

.page-faq .faq-group-head {
  max-width: 740px;
  margin-bottom: clamp(32px, 4.5vw, 62px);
}

.page-faq .faq-group-tag {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.18em;
  color: var(--gold);
  text-transform: uppercase;
}

.page-faq .faq-group-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(25px, 3.4vw, 44px);
  line-height: 1.16;
  letter-spacing: -0.005em;
  color: var(--porcelain);
}

.page-faq .faq-group-lead {
  margin: 16px 0 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--porcelain-dim);
}

.page-faq .faq-group-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
}

@media (min-width: 1000px) {
  .page-faq .faq-group-body--split {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-group-body--rev {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr);
  }

  .page-faq .faq-group-body--rev .faq-figure {
    grid-column: 1;
    grid-row: 1;
  }

  .page-faq .faq-group-body--rev .faq-list {
    grid-column: 2;
    grid-row: 1;
  }
}

/* —— 折叠问答 —— */
.page-faq .faq-list {
  border-top: 1px solid var(--ink-600);
  min-width: 0;
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--ink-600);
  transition: background .2s var(--ease);
}

.page-faq .faq-item[open] {
  background: rgba(201, 162, 74, 0.06);
}

.page-faq .faq-summary {
  display: grid;
  grid-template-columns: var(--faq-num-col) minmax(0, 1fr) 1.25rem;
  gap: 0 var(--faq-col-gap);
  align-items: center;
  padding: 20px 4px;
  cursor: pointer;
  list-style: none;
}

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

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

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

.page-faq .faq-num {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  font-variant-numeric: tabular-nums;
  color: var(--gold);
}

.page-faq .faq-q {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: clamp(16px, 1.15vw, 19px);
  line-height: 1.5;
  color: var(--porcelain);
  transition: color .16s var(--ease);
}

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

.page-faq .faq-toggle {
  position: relative;
  justify-self: end;
  align-self: center;
  width: 14px;
  height: 14px;
}

.page-faq .faq-toggle::before,
.page-faq .faq-toggle::after {
  content: "";
  position: absolute;
  background: var(--gold);
  transition: transform .24s var(--ease), opacity .24s var(--ease);
}

.page-faq .faq-toggle::before {
  top: 50%;
  left: 0;
  width: 14px;
  height: 1px;
  transform: translateY(-50%);
}

.page-faq .faq-toggle::after {
  left: 50%;
  top: 0;
  width: 1px;
  height: 14px;
  transform: translateX(-50%);
}

.page-faq .faq-item[open] .faq-toggle::after {
  transform: translateX(-50%) scaleY(0);
  opacity: 0;
}

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

.page-faq .faq-answer {
  padding: 0 4px 24px;
  animation: faq-answer-in .28s var(--ease);
}

@media (min-width: 640px) {
  .page-faq .faq-answer {
    padding-left: calc(var(--faq-num-col) + var(--faq-col-gap) + 4px);
  }
}

.page-faq .faq-answer p {
  margin: 0;
  max-width: 64ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--porcelain-dim);
}

.page-faq .faq-answer p + p {
  margin-top: 10px;
}

.page-faq .faq-answer .text-link {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(201, 162, 74, 0.5);
}

.page-faq .faq-answer .text-link:hover,
.page-faq .faq-answer .text-link:focus-visible {
  color: var(--gold-soft);
  border-bottom-color: var(--gold-soft);
}

@keyframes faq-answer-in {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* —— 图版 —— */
.page-faq .faq-figure {
  margin: 0;
  min-width: 0;
}

.page-faq .media-frame.faq-frame {
  aspect-ratio: 10 / 7;
  border: 1px solid var(--ink-600);
}

.page-faq .media-frame.faq-frame--wide {
  aspect-ratio: 12 / 7;
}

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

.page-faq .faq-caption {
  margin-top: 14px;
  padding-left: 12px;
  border-left: 1px solid var(--gold);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: 0.03em;
  color: var(--porcelain-dim);
}

/* —— 收尾 —— */
.page-faq .faq-cta-panel {
  position: relative;
  overflow: hidden;
  padding: clamp(32px, 5vw, 72px);
  border: 1px solid var(--ink-600);
  background:
    radial-gradient(88% 130% at 88% 6%, rgba(201, 162, 74, 0.16), transparent 62%),
    var(--ink-800);
}

.page-faq .faq-cta-panel::after {
  content: "";
  position: absolute;
  top: 0;
  left: clamp(32px, 5vw, 72px);
  width: 64px;
  height: 3px;
  background: var(--cinnabar);
}

.page-faq .faq-cta-kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--gold);
  text-transform: uppercase;
}

.page-faq .faq-cta-title {
  margin: 0;
  max-width: 22em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3vw, 38px);
  line-height: 1.2;
  color: var(--porcelain);
}

.page-faq .faq-cta-text {
  margin: 18px 0 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--porcelain-dim);
}

.page-faq .faq-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: clamp(24px, 3vw, 36px);
}

/* —— 窄屏收敛 —— */
@media (max-width: 639px) {
  .page-faq .faq-summary {
    grid-template-columns: 2.6rem minmax(0, 1fr) 1rem;
    gap: 0 12px;
    padding: 17px 2px;
  }

  .page-faq .faq-num {
    font-size: 11.5px;
  }

  .page-faq .faq-fact {
    grid-template-columns: 4.2rem minmax(0, 1fr);
    gap: 6px 12px;
  }

  .page-faq .faq-fact-num {
    font-size: 19px;
  }

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

/* —— 降低动效偏好 —— */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-answer {
    animation: none;
  }

  .page-faq .faq-item,
  .page-faq .faq-q,
  .page-faq .faq-toggle::before,
  .page-faq .faq-toggle::after,
  .page-faq .faq-index-link {
    transition: none;
  }
}