.page-faq {
  --faq-line: rgba(243, 236, 221, 0.12);
  --faq-soft: rgba(243, 236, 221, 0.05);
  --faq-text: rgba(243, 236, 221, 0.86);
  color: var(--paper);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: clamp(32px, 6vw, 84px) 0 clamp(24px, 4vw, 44px);
  background:
    radial-gradient(120% 90% at 6% 0%, rgba(31, 107, 126, 0.34), transparent 62%),
    radial-gradient(90% 70% at 100% 100%, rgba(61, 242, 192, 0.10), transparent 70%);
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: clamp(26px, 5vw, 60px);
  align-items: start;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(30px, 6.2vw, 62px);
  line-height: 1.06;
  letter-spacing: -0.012em;
  margin: 14px 0 18px;
}

.page-faq .faq-hero .lede {
  max-width: 52ch;
  color: var(--faq-text);
}

.page-faq .faq-hero__fig {
  margin: 0;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--faq-soft);
}

.page-faq .faq-hero__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1000 / 700;
  object-fit: cover;
}

.page-faq .img-frame__cap {
  padding: 10px 14px;
  border-top: 1px solid var(--faq-line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

/* ---------- 主题索引 ---------- */

.page-faq .faq-index {
  margin-top: clamp(12px, 3vw, 28px);
  padding-top: 22px;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-faq .faq-index__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 13px 2px;
  border-bottom: 1px solid var(--faq-line);
  color: var(--paper);
  text-decoration: none;
  font-size: 15px;
  line-height: 1.5;
  transition: color 160ms ease, border-color 160ms ease;
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--neon);
  border-color: rgba(61, 242, 192, 0.5);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
  flex: none;
}

/* ---------- 主题分组 ---------- */

.page-faq .faq-topic {
  padding: clamp(30px, 5vw, 58px) 0;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-topic:first-of-type {
  border-top: 0;
}

.page-faq .faq-topic__head {
  display: grid;
  gap: 8px;
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-faq .faq-topic__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--neon);
}

.page-faq .faq-topic h2 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(24px, 4.6vw, 34px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0;
}

.page-faq .faq-topic__note {
  margin: 0;
  max-width: 34ch;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.75;
}

/* ---------- 问答条目 ---------- */

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

.page-faq .qa:first-child {
  border-top: 1px solid var(--faq-line);
}

.page-faq .qa__q {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 17px 40px 17px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(17px, 2.3vw, 20px);
  line-height: 1.5;
  color: var(--paper);
  transition: color 160ms ease;
}

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

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

.page-faq .qa__q::before,
.page-faq .qa__q::after {
  content: "";
  position: absolute;
  top: 50%;
  background: var(--mist);
  transition: transform 200ms ease, background 160ms ease;
}

.page-faq .qa__q::before {
  right: 8px;
  width: 14px;
  height: 1px;
  transform: translateY(-50%);
}

.page-faq .qa__q::after {
  right: 14px;
  width: 1px;
  height: 14px;
  transform: translateY(-50%) scaleY(1);
}

.page-faq .qa[open] .qa__q::after {
  transform: translateY(-50%) scaleY(0);
}

.page-faq .qa__q:hover::before,
.page-faq .qa__q:hover::after {
  background: var(--neon);
}

.page-faq .qa__num {
  flex: none;
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--neon);
}

.page-faq .qa__body {
  padding: 0 0 22px;
  max-width: 62ch;
  color: var(--faq-text);
  font-size: 16px;
  line-height: 1.9;
}

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

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

.page-faq .qa__body a {
  color: var(--neon);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
}

.page-faq .qa__body strong {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.94em;
  color: var(--neon);
}

.page-faq .qa__quote {
  margin: 14px 0;
  padding: 13px 18px;
  background: var(--ink);
  border-left: 2px solid var(--tier-3);
  border-radius: var(--radius);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.8;
  letter-spacing: 0.02em;
  word-break: break-word;
}

.page-faq .qa__tip {
  position: relative;
  padding-left: 18px;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.8;
}

.page-faq .qa__tip::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 1px;
  background: var(--tier-3);
}

/* ---------- 分组间隔图 ---------- */

.page-faq .faq-band {
  margin: clamp(20px, 4vw, 40px) 0;
  padding: 0;
  border-top: 1px solid var(--faq-line);
  border-bottom: 1px solid var(--faq-line);
  overflow: hidden;
}

.page-faq .faq-band img {
  display: block;
  width: 100%;
  height: clamp(110px, 20vw, 220px);
  object-fit: cover;
  opacity: 0.45;
  filter: grayscale(0.35);
}

/* ---------- 收尾 ---------- */

.page-faq .faq-outro {
  padding: clamp(28px, 5vw, 56px) 0 clamp(12px, 3vw, 24px);
}

.page-faq .faq-outro__inner {
  padding: clamp(24px, 4vw, 40px);
}

.page-faq .faq-outro h2 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(22px, 3.4vw, 30px);
  line-height: 1.2;
  margin: 0 0 12px;
}

.page-faq .faq-outro p {
  margin: 0 0 18px;
  max-width: 56ch;
  color: var(--faq-text);
  font-size: 15px;
  line-height: 1.85;
}

.page-faq .faq-outro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 22px;
}

.page-faq .faq-outro__actions p,
.page-faq .faq-outro__actions > * {
  margin: 0;
}

.page-faq .faq-outro .round-stamp {
  margin: 0;
  padding-top: 18px;
  border-top: 1px solid var(--faq-line);
}

/* ---------- 响应式 ---------- */

@media (min-width: 620px) {
  .page-faq .faq-index__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 24px;
  }
}

@media (min-width: 880px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.85fr);
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-index__list {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-faq .faq-topic__inner {
    display: grid;
    grid-template-columns: 220px minmax(0, 1fr);
    column-gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }

  .page-faq .faq-topic__head {
    position: sticky;
    top: 32px;
    margin-bottom: 0;
  }

  .page-faq .qa {
    display: grid;
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.45fr);
    column-gap: clamp(28px, 4vw, 64px);
    align-items: start;
  }

  .page-faq .qa__q {
    grid-column: 1;
    grid-row: 1;
  }

  .page-faq .qa__body {
    grid-column: 2;
    grid-row: 1;
    padding: 20px 0 24px;
  }
}

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