.page-faq {
  position: relative;
  background: var(--ink-950);
  color: var(--paper-100);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: 20px 0 0;
  background:
    radial-gradient(1100px 420px at 84% -12%, rgba(107, 18, 38, 0.55), transparent 66%),
    linear-gradient(180deg, rgba(22, 20, 26, 0.92) 0%, var(--ink-950) 100%);
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  padding: 14px 0 30px;
}

.page-faq .faq-hero__title {
  margin: 10px 0 16px;
  font-size: clamp(1.9rem, 6.4vw, 3.3rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 900;
}

.page-faq .lede {
  max-width: 58ch;
  color: var(--copper-200);
}

.page-faq .faq-hero__panel {
  background: var(--ink-800);
  border: 1px solid var(--line-soft);
  border-top: 2px solid var(--copper-500);
  padding: 16px 18px 18px;
}

.page-faq .faq-hero__facts {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-hero__fact {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line-soft);
}

.page-faq .faq-hero__fact:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-faq .faq-hero__v {
  flex: 0 0 auto;
  min-width: 4.6em;
  color: var(--cyan-400);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-faq .faq-hero__k {
  color: var(--slate-400);
  font-size: 0.875rem;
  line-height: 1.5;
}

.page-faq .faq-hero__media {
  margin: 0 0 28px;
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--copper-500);
  background: var(--ink-800);
  overflow: hidden;
}

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

/* ---------- 筛选 ---------- */
.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 22px 0 20px;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-filter__label {
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--copper-500);
  margin-right: 4px;
}

.page-faq .faq-chip {
  appearance: none;
  font: inherit;
  font-size: 0.8125rem;
  line-height: 1.2;
  padding: 7px 13px;
  background: transparent;
  color: var(--slate-400);
  border: 1px solid var(--line-mid);
  cursor: pointer;
  transition: color 160ms ease-out, border-color 160ms ease-out, background-color 160ms ease-out;
}

.page-faq .faq-chip:hover {
  color: var(--copper-200);
  border-color: var(--line-copper);
}

.page-faq .faq-chip.is-active {
  color: var(--ink-950);
  background: var(--copper-500);
  border-color: var(--copper-500);
  font-weight: 700;
}

.page-faq .faq-chip:focus-visible {
  outline: 2px solid var(--copper-500);
  outline-offset: 2px;
}

.page-faq .faq-chip--clear {
  color: var(--wine-400);
  border-color: var(--line-copper);
}

.page-faq .faq-filter__status {
  font-size: 0.75rem;
  color: var(--slate-400);
  margin-left: auto;
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  padding-top: 26px;
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 6px 0;
  color: var(--slate-400);
  font-size: 0.875rem;
  text-decoration: none;
  transition: color 160ms ease-out;
}

.page-faq .faq-index__link .mono {
  color: var(--copper-500);
  font-size: 11px;
  letter-spacing: 0.14em;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--copper-200);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 96px;
  padding-top: 28px;
  margin-top: 28px;
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-group:first-child {
  padding-top: 0;
  margin-top: 0;
  border-top: 0;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.page-faq .faq-group__num {
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--copper-500);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(1.2rem, 3.4vw, 1.6rem);
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.page-faq .faq-group__note {
  margin: 6px 0 14px;
  font-size: 0.8125rem;
  color: var(--slate-400);
}

.page-faq .faq-diagram {
  margin: 0 0 18px;
  border: 1px solid var(--line-soft);
  background: var(--ink-800);
  overflow: hidden;
}

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

.page-faq .faq-diagram figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line-soft);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--copper-200);
}

/* ---------- 问答折页 ---------- */
.page-faq .qa {
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .qa[open] {
  border-bottom-color: var(--line-copper);
}

.page-faq .qa__q {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: baseline;
  gap: 12px;
  padding: 15px 6px;
  cursor: pointer;
  list-style: none;
  transition: background-color 160ms ease-out;
}

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

.page-faq .qa__q:hover {
  background: rgba(201, 135, 60, 0.06);
}

.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--copper-500);
  outline-offset: -2px;
}

.page-faq .qa__num {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--copper-500);
}

.page-faq .qa__text {
  font-size: 0.975rem;
  font-weight: 700;
  line-height: 1.55;
  color: var(--paper-100);
}

.page-faq .qa[open] .qa__text {
  color: var(--copper-200);
}

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

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  background: var(--copper-500);
  transition: transform 180ms ease-out;
}

.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);
}

.page-faq .qa__a {
  padding: 0 6px 20px 34px;
}

.page-faq .qa__a p {
  margin: 0 0 0.75em;
  color: rgba(242, 239, 232, 0.78);
  font-size: 0.9375rem;
  line-height: 1.78;
  max-width: 62ch;
}

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

.page-faq .qa__jump {
  margin-top: 14px;
}

.page-faq .qa__jump .btn {
  font-size: 0.8125rem;
  padding: 8px 14px;
}

/* ---------- 底部引导 ---------- */
.page-faq .faq-cta {
  margin-top: 56px;
  padding: 0 0 64px;
}

.page-faq .faq-cta__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  padding: 26px 24px;
  background:
    linear-gradient(94deg, rgba(107, 18, 38, 0.85) 0%, rgba(22, 20, 26, 0.96) 62%),
    var(--ink-800);
  border: 1px solid var(--line-mid);
  border-left: 3px solid var(--copper-500);
}

.page-faq .faq-cta__title {
  margin: 8px 0 10px;
  font-size: clamp(1.15rem, 3.2vw, 1.5rem);
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.page-faq .faq-cta__body {
  margin: 0;
  max-width: 58ch;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: rgba(242, 239, 232, 0.8);
}

.page-faq .faq-cta__link {
  justify-self: start;
  align-self: center;
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.7fr) minmax(240px, 1fr);
    gap: 32px;
    align-items: start;
  }

  .page-faq .faq-hero__facts {
    grid-template-columns: 1fr;
  }

  .page-faq .faq-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 32px 34px;
  }

  .page-faq .faq-cta__link {
    justify-self: end;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1024px) {
  .page-faq .faq-hero {
    padding-top: 26px;
  }

  .page-faq .faq-body {
    grid-template-columns: 216px minmax(0, 1fr);
    gap: 48px;
    padding-top: 34px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
  }

  .page-faq .faq-index__link {
    padding: 9px 10px;
    border-left: 2px solid transparent;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    border-left-color: var(--copper-500);
    background: rgba(201, 135, 60, 0.07);
  }

  .page-faq .qa__q {
    padding: 17px 8px;
  }

  .page-faq .qa__a {
    padding: 0 8px 22px 42px;
  }

  .page-faq .faq-group {
    padding-top: 34px;
    margin-top: 34px;
  }

  .page-faq .faq-group:first-child {
    padding-top: 0;
    margin-top: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-chip,
  .page-faq .qa__q,
  .page-faq .qa__mark::before,
  .page-faq .qa__mark::after,
  .page-faq .faq-index__link {
    transition: none;
  }
}