.page-faq {
  --faq-toc-w: 228px;
  --faq-rule: rgba(143, 167, 156, 0.22);
  --faq-indent: 46px;
  background: var(--pitch);
  color: var(--text);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -120px;
  top: -140px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(201, 242, 60, 0.09), transparent 68%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: clamp(28px, 5vw, 52px);
  margin-top: clamp(22px, 3.6vw, 38px);
  align-items: start;
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  max-width: 15em;
  font-family: var(--font-heading);
  font-size: clamp(29px, 5.4vw, 46px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-faq .faq-hero__desc {
  margin-top: clamp(16px, 2.4vw, 22px);
  max-width: 60ch;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-faq .faq-readout {
  padding: clamp(18px, 3vw, 26px);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-sm);
  background: linear-gradient(155deg, rgba(18, 58, 43, 0.92), rgba(11, 42, 32, 0.5));
}

.page-faq .faq-readout__title {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--mist);
}

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

.page-faq .faq-readout__item {
  display: grid;
  grid-template-columns: auto auto;
  align-items: baseline;
  column-gap: 8px;
  padding-top: 16px;
  margin-top: 16px;
  border-top: 1px solid var(--hair);
}

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

.page-faq .faq-readout__num {
  font-family: var(--font-display);
  font-size: clamp(38px, 6vw, 46px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.01em;
  color: var(--lime);
}

.page-faq .faq-readout__unit {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-dim);
}

.page-faq .faq-readout__cap {
  grid-column: 1 / -1;
  margin-top: 5px;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--mist);
}

/* ---------- 通栏图 ---------- */

.page-faq .faq-band {
  background: var(--pitch);
  padding: 0 var(--gutter) clamp(30px, 5vw, 54px);
}

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

.page-faq .faq-band__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

/* ---------- 主体两栏 ---------- */

.page-faq .faq-body {
  background: var(--pitch);
}

.page-faq .faq-layout {
  display: grid;
  gap: clamp(26px, 4vw, 60px);
  align-items: start;
}

.page-faq .faq-toc__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.page-faq .faq-toc__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-toc__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 13px;
  border: 1px solid var(--hair);
  border-radius: 999px;
  font-size: 13.5px;
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease, transform 0.18s ease;
}

.page-faq .faq-toc__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  border-color: var(--lime);
  color: var(--lime);
  outline: none;
}

.page-faq .faq-toc__link:focus-visible {
  box-shadow: 0 0 0 2px rgba(201, 242, 60, 0.45);
}

/* ---------- 分组 ---------- */

.page-faq .faq-group {
  padding-top: clamp(44px, 6vw, 72px);
}

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

.page-faq .faq-group__head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(14px, 2vw, 20px);
}

.page-faq .faq-group__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--lime);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: clamp(21px, 2.7vw, 26px);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-faq .faq-group__desc {
  margin: 0;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 问答条目 ---------- */

.page-faq .faq-list {
  border-top: 1px solid var(--faq-rule);
}

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

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 18px;
  align-items: center;
  gap: 12px;
  padding: clamp(16px, 2.4vw, 22px) 0;
  cursor: pointer;
  list-style: none;
  font-size: clamp(15.5px, 1.9vw, 17px);
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--paper);
  transition: color 0.18s ease;
}

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

.page-faq .faq-item__num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--mist);
  transition: color 0.18s ease, transform 0.18s ease;
}

.page-faq .faq-item__q:hover .faq-item__num,
.page-faq .faq-item__q:focus-visible .faq-item__num {
  color: var(--lime);
  transform: translateX(2px);
}

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid rgba(201, 242, 60, 0.55);
  outline-offset: 2px;
}

.page-faq .faq-item[open] .faq-item__text {
  color: var(--lime);
}

.page-faq .faq-item__sign {
  position: relative;
  justify-self: end;
  width: 18px;
  height: 18px;
}

.page-faq .faq-item__sign::before,
.page-faq .faq-item__sign::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  height: 1.5px;
  margin-top: -0.75px;
  background: var(--mist);
  transition: transform 0.2s ease, opacity 0.2s ease, background-color 0.2s ease;
}

.page-faq .faq-item__sign::after {
  transform: rotate(90deg);
}

.page-faq .faq-item[open] .faq-item__sign::before,
.page-faq .faq-item[open] .faq-item__sign::after {
  background: var(--lime);
}

.page-faq .faq-item[open] .faq-item__sign::after {
  transform: rotate(90deg) scaleX(0);
  opacity: 0;
}

.page-faq .faq-item__a {
  padding-bottom: clamp(18px, 2.6vw, 26px);
  color: var(--text-dim);
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.85;
}

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

.page-faq .faq-fig {
  display: inline-block;
  padding: 0 2px;
  font-family: var(--font-display);
  font-size: 1.55em;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.01em;
  color: var(--lime);
}

.page-faq .faq-item__links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 14.5px;
}

/* ---------- 手机章节图文 ---------- */

.page-faq .faq-split {
  display: grid;
  gap: clamp(22px, 3.4vw, 36px);
}

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

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

/* ---------- 底部引导 ---------- */

.page-faq .faq-cta {
  display: grid;
  gap: 18px;
  margin-top: clamp(28px, 4vw, 44px);
  padding: clamp(22px, 3.4vw, 32px);
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--lime);
  border-radius: var(--r-sm);
  background: linear-gradient(150deg, rgba(18, 58, 43, 0.92), rgba(11, 42, 32, 0.45));
}

.page-faq .faq-cta__text {
  margin: 0;
  max-width: 56ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--text);
}

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

/* ---------- 断点 ---------- */

@media (min-width: 700px) {
  .page-faq .faq-item__a {
    padding-left: var(--faq-indent);
  }
}

@media (min-width: 860px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.6fr) minmax(268px, 0.9fr);
    gap: clamp(34px, 5vw, 72px);
  }

  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1.4fr) minmax(240px, 0.6fr);
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-toc-w) minmax(0, 1fr);
  }

  .page-faq .faq-toc__inner {
    position: sticky;
    top: 98px;
    max-height: calc(100vh - 130px);
    overflow-y: auto;
    padding-right: 4px;
  }

  .page-faq .faq-toc__list {
    display: grid;
    gap: 0;
  }

  .page-faq .faq-toc__link {
    display: flex;
    align-items: baseline;
    gap: 10px;
    padding: 10px 0 10px 14px;
    border: 0;
    border-left: 2px solid var(--faq-rule);
    border-radius: 0;
    font-size: 14px;
  }

  .page-faq .faq-toc__link:hover,
  .page-faq .faq-toc__link:focus-visible {
    border-left-color: var(--lime);
    color: var(--lime);
    transform: translateX(3px);
    box-shadow: none;
  }

  .page-faq .faq-toc__link:focus-visible {
    outline: 2px solid rgba(201, 242, 60, 0.5);
    outline-offset: 2px;
  }
}

@media (min-width: 1240px) {
  .page-faq {
    --faq-toc-w: 252px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-toc__link,
  .page-faq .faq-item__q,
  .page-faq .faq-item__num,
  .page-faq .faq-item__sign::before,
  .page-faq .faq-item__sign::after {
    transition: none;
  }
}