.page-faq {
  background: var(--ce-deep);
  color: var(--ce-ink);
  font-family: var(--ce-sans);
  padding-bottom: 64px;
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 28px 0 4px;
  background-image:
    linear-gradient(to right, rgba(143, 183, 201, .06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(143, 183, 201, .06) 1px, transparent 1px),
    radial-gradient(120% 95% at 8% 0%, rgba(56, 214, 201, .13), transparent 56%),
    radial-gradient(95% 85% at 100% 4%, rgba(18, 48, 79, .92), transparent 62%);
  background-size: 56px 56px, 56px 56px, auto, auto;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 26px;
  margin-top: 22px;
}

.page-faq .faq-hero__title {
  margin: 10px 0 0;
  font-size: clamp(34px, 9vw, 60px);
  line-height: 1.05;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ce-ink);
}

.page-faq .faq-hero__intro {
  max-width: 44ch;
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ce-ink);
}

.page-faq .faq-hero__note {
  max-width: 46ch;
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.75;
  letter-spacing: .03em;
  color: var(--ce-anno);
}

.page-faq .faq-hero__visual {
  margin: 0;
}

.page-faq .faq-hero__visual img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--ce-line);
  background: var(--ce-void);
}

.page-faq .faq-hero__cap {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .04em;
  color: var(--ce-anno);
}

/* 主题索引条 */
.page-faq .faq-index {
  list-style: none;
  margin: 30px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--ce-line);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--ce-line);
  background: rgba(18, 48, 79, .55);
  color: var(--ce-ink);
  font-size: 13px;
  text-decoration: none;
  transition: border-color var(--ce-dur) var(--ce-ease),
              background-color var(--ce-dur) var(--ce-ease),
              color var(--ce-dur) var(--ce-ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-color: var(--ce-cyan);
  background: rgba(56, 214, 201, .12);
  color: var(--ce-cyan);
}

.page-faq .faq-index__link:focus-visible {
  outline: 1px solid var(--ce-cyan);
  outline-offset: 2px;
}

.page-faq .faq-index__num {
  font-family: var(--ce-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--ce-cyan);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  padding: 46px 0 6px;
  scroll-margin-top: 96px;
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 14px;
  row-gap: 6px;
  align-items: baseline;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--ce-line);
}

.page-faq .faq-group__num {
  font-family: var(--ce-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--ce-steel);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: .16em;
  color: var(--ce-ink);
}

.page-faq .faq-group__desc {
  grid-column: 2;
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  letter-spacing: .02em;
  color: var(--ce-anno);
}

/* 问答条目 */
.page-faq .faq-list {
  margin-top: 2px;
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--ce-line);
}

.page-faq .faq-item__heading {
  margin: 0;
}

.page-faq .faq-item__btn {
  width: 100%;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr) 14px;
  gap: 12px;
  align-items: start;
  padding: 22px 0;
  background: transparent;
  border: 0;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: color var(--ce-dur) var(--ce-ease);
}

.page-faq .faq-item__btn:focus-visible {
  outline: 1px solid var(--ce-cyan);
  outline-offset: 2px;
}

.page-faq .faq-item__num {
  font-family: var(--ce-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--ce-steel);
  padding-top: 6px;
}

.page-faq .faq-item__text {
  font-size: 16px;
  line-height: 1.65;
  font-weight: 600;
  color: var(--ce-ink);
  transition: color var(--ce-dur) var(--ce-ease);
}

.page-faq .faq-item__btn:hover .faq-item__text {
  color: var(--ce-cyan);
}

.page-faq .faq-item__mark {
  position: relative;
  display: block;
  width: 14px;
  height: 14px;
  margin-top: 7px;
  justify-self: end;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--ce-cyan);
  transition: transform var(--ce-dur) var(--ce-ease),
              opacity var(--ce-dur) var(--ce-ease);
}

.page-faq .faq-item__mark::before {
  left: 0;
  top: 6.5px;
  width: 14px;
  height: 1px;
}

.page-faq .faq-item__mark::after {
  left: 6.5px;
  top: 0;
  width: 1px;
  height: 14px;
}

.page-faq .faq-item__btn[aria-expanded="true"] .faq-item__mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-item__panel {
  margin: 0 0 22px;
  padding: 16px 18px;
  background: var(--ce-deep-2);
  border-left: 2px solid var(--ce-cyan);
  font-size: 15px;
  line-height: 1.85;
  color: var(--ce-ink);
}

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

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

.page-faq .faq-item__meta {
  font-family: var(--ce-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--ce-anno);
}

/* ---------- 中段插图 ---------- */
.page-faq .faq-figure {
  margin: 38px 0 4px;
  padding: 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--ce-line);
  background: var(--ce-void);
}

.page-faq .faq-figure__cap {
  margin-top: 10px;
  max-width: 62ch;
  font-size: 12px;
  line-height: 1.75;
  letter-spacing: .04em;
  color: var(--ce-anno);
}

/* ---------- 口径速查条 ---------- */
.page-faq .faq-quick {
  padding: 44px 0 4px;
  scroll-margin-top: 96px;
}

.page-faq .faq-quick__bar {
  border: 1px solid var(--ce-line);
  padding: 22px 20px 20px;
  background:
    linear-gradient(135deg, rgba(56, 214, 201, .11), rgba(18, 48, 79, .74) 48%, rgba(11, 31, 58, .52));
}

.page-faq .faq-quick__title {
  margin: 0;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .2em;
  color: var(--ce-ink);
}

.page-faq .faq-quick__sub {
  margin: 7px 0 0;
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .04em;
  color: var(--ce-anno);
}

.page-faq .faq-quick__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 18px 0 0;
  padding: 1px;
  background: var(--ce-line);
  border: 1px solid var(--ce-line);
}

.page-faq .faq-quick__cell {
  background: rgba(6, 20, 40, .78);
  padding: 14px 16px;
}

.page-faq .faq-quick__cell dt {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--ce-anno);
}

.page-faq .faq-quick__cell dd {
  margin: 7px 0 0;
  font-family: var(--ce-mono);
  font-size: 18px;
  line-height: 1.3;
  letter-spacing: .02em;
  color: var(--ce-cyan);
}

/* ---------- 窄屏到桌面的过渡 ---------- */
@media (min-width: 560px) {
  .page-faq .faq-item__btn {
    grid-template-columns: 52px minmax(0, 1fr) 14px;
    gap: 16px;
    padding: 24px 0;
  }

  .page-faq .faq-item__panel {
    margin-left: 68px;
    padding: 18px 22px;
  }
}

@media (min-width: 700px) {
  .page-faq .faq-quick__list {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-faq .faq-quick__bar {
    padding: 26px 28px 24px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding-top: 36px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: end;
    margin-top: 30px;
  }

  .page-faq .faq-index {
    margin-top: 36px;
    padding-top: 20px;
  }

  .page-faq .faq-group__head {
    column-gap: 20px;
  }

  .page-faq .faq-group__title {
    font-size: 20px;
  }

  .page-faq .faq-item__btn {
    grid-template-columns: 64px minmax(0, 1fr) 14px;
    padding: 28px 0;
  }

  .page-faq .faq-item__text {
    font-size: 17px;
  }

  .page-faq .faq-item__panel {
    margin-left: 80px;
    margin-bottom: 28px;
    padding: 20px 28px;
  }

  .page-faq .faq-figure {
    margin-top: 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition: none !important;
  }
}