.page-faq {
  --faq-rule: 2px solid var(--line);
  --faq-block: clamp(44px, 7vw, 88px);
  padding-bottom: clamp(48px, 8vw, 110px);
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  position: relative;
  border-bottom: var(--faq-rule);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: .22;
  pointer-events: none;
  -webkit-mask-image: radial-gradient(ellipse 72% 95% at 86% 0%, #000 0%, transparent 74%);
  mask-image: radial-gradient(ellipse 72% 95% at 86% 0%, #000 0%, transparent 74%);
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  padding-block: clamp(26px, 5vw, 56px) clamp(28px, 4vw, 44px);
}

.page-faq .faq-hero__lead .label {
  display: inline-block;
  margin: 0 0 10px;
  color: var(--field);
}

.page-faq .faq-hero h1 {
  margin: 0 0 16px;
  font-size: clamp(40px, 8vw, 80px);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -.02em;
  color: var(--text);
}

.page-faq .faq-hero__intro {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(15.5px, 1.5vw, 17.5px);
  line-height: 1.9;
  color: var(--muted);
}

.page-faq .faq-hero__meta {
  border: var(--faq-rule);
  border-left: 4px solid var(--field);
  background: var(--panel);
  padding: 18px 20px 22px;
  box-shadow: var(--hard-shadow);
}

.page-faq .faq-hero__meta .label {
  margin: 0;
  color: var(--muted);
}

.page-faq .faq-facts {
  margin: 14px 0 0;
  display: grid;
  gap: 0;
}

.page-faq .faq-facts__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 9px 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-facts__row:first-child {
  border-top: 0;
}

.page-faq .faq-facts dt {
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--muted);
}

.page-faq .faq-facts dd {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}

/* ============ 场景索引条 ============ */
.page-faq .faq-jump {
  margin-top: clamp(20px, 3vw, 34px);
  border-top: var(--faq-rule);
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}

.page-faq .faq-jump__list {
  display: flex;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 14px var(--gutter);
  min-width: max-content;
}

.page-faq .faq-jump__link {
  display: inline-flex;
  align-items: center;
  padding: 9px 14px;
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
  letter-spacing: .08em;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 180ms var(--ease), color 180ms var(--ease),
              background-color 180ms var(--ease), transform 180ms var(--ease);
}

.page-faq .faq-jump__link:hover,
.page-faq .faq-jump__link:focus-visible {
  border-color: var(--field);
  color: var(--field);
  background: var(--panel);
  transform: translateY(-2px);
}

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

/* ============ 分区标头 ============ */
.page-faq .faq-group {
  padding-top: var(--faq-block);
  scroll-margin-top: 96px;
}

.page-faq .faq-group__head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-faq .faq-group__num {
  display: block;
  font-size: clamp(38px, 6vw, 58px);
  font-weight: 700;
  line-height: .85;
  letter-spacing: -.03em;
  color: var(--field);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-group__title {
  margin: 0 0 10px;
  font-size: clamp(22px, 3.2vw, 34px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--text);
}

.page-faq .faq-group__desc {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

/* ============ 问答条目 ============ */
.page-faq .qa-list {
  border-bottom: var(--faq-rule);
}

.page-faq .qa {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: var(--faq-rule);
  transition: background-color 200ms var(--ease);
}

.page-faq .qa::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: var(--field);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform 200ms var(--ease);
  pointer-events: none;
}

.page-faq .qa[open] {
  background: var(--panel);
}

.page-faq .qa[open]::before {
  transform: scaleY(1);
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 18px 16px 18px 20px;
  cursor: pointer;
  list-style: none;
  font-size: clamp(15.5px, 1.5vw, 18px);
  font-weight: 700;
  line-height: 1.65;
  color: var(--text);
  transition: color 180ms var(--ease);
}

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

.page-faq .qa__q:hover {
  color: var(--field);
}

.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: -3px;
}

.page-faq .qa__idx {
  flex: 0 0 auto;
  padding-top: 4px;
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--field);
  font-variant-numeric: tabular-nums;
}

.page-faq .qa__text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .qa__mark {
  flex: 0 0 auto;
  position: relative;
  align-self: center;
  width: 14px;
  height: 14px;
  margin-left: auto;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  background: var(--field);
  transition: transform 180ms var(--ease), opacity 180ms var(--ease);
}

.page-faq .qa__mark::before {
  left: 0;
  right: 0;
  top: 6px;
  height: 2px;
}

.page-faq .qa__mark::after {
  top: 0;
  bottom: 0;
  left: 6px;
  width: 2px;
}

.page-faq .qa[open] .qa__mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .qa__a {
  padding: 0 20px 24px 20px;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--muted);
  animation: faq-reveal 180ms var(--ease) both;
}

.page-faq .qa__a > p {
  margin: 0 0 12px;
}

.page-faq .qa__a > p:last-child {
  margin-bottom: 0;
}

.page-faq .qa__a a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-faq .qa__a a:hover,
.page-faq .qa__a a:focus-visible {
  color: var(--field);
}

.page-faq .qa__a .mono {
  color: var(--text);
}

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

/* ============ 配图 ============ */
.page-faq .faq-figure {
  margin: clamp(24px, 4vw, 40px) 0 0;
}

.page-faq .faq-shot {
  position: relative;
  overflow: hidden;
  border: var(--faq-rule);
  background: var(--panel-2);
  aspect-ratio: 16 / 9;
  box-shadow: var(--hard-shadow);
}

.page-faq .faq-shot img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(.85) contrast(1.05);
}

.page-faq .faq-shot::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(31, 224, 160, .16), transparent 55%),
    linear-gradient(to top, rgba(7, 16, 13, .85), transparent 62%);
  pointer-events: none;
}

.page-faq .faq-figure figcaption {
  margin-top: 12px;
  font-size: 12.5px;
  letter-spacing: .08em;
  line-height: 1.7;
  color: var(--muted);
}

/* ============ 尾部行动条 ============ */
.page-faq .faq-cta {
  padding-top: var(--faq-block);
}

.page-faq .faq-cta__inner {
  display: grid;
  gap: 20px;
  padding: clamp(22px, 3.5vw, 34px);
  border: var(--faq-rule);
  border-left: 4px solid var(--orange);
  background: var(--panel-2);
  box-shadow: var(--hard-shadow);
}

.page-faq .faq-cta__text {
  margin: 0;
  font-size: clamp(15.5px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--text);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ============ 桌面栅格 ============ */
@media (min-width: 760px) {
  .page-faq .faq-group__head {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 10px 26px;
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
    column-gap: clamp(32px, 5vw, 72px);
  }
}

@media (min-width: 980px) {
  .page-faq .qa {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.12fr);
    align-items: start;
  }

  .page-faq .qa__q {
    grid-column: 1;
    padding: 22px 36px 22px 22px;
  }

  .page-faq .qa__a {
    grid-column: 2;
    padding: 24px 24px 26px 28px;
    border-left: 1px solid var(--line);
  }

  .page-faq .faq-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__a {
    animation: none;
  }

  .page-faq .qa,
  .page-faq .qa::before,
  .page-faq .qa__q,
  .page-faq .qa__mark::before,
  .page-faq .qa__mark::after,
  .page-faq .faq-jump__link {
    transition: none;
  }
}