.page-faq {
  --faq-line: rgba(232, 238, 244, 0.12);
  --faq-line-strong: rgba(232, 238, 244, 0.28);
  --faq-turf-read: #2e9e6b;
  --faq-muted: rgba(232, 238, 244, 0.72);
  display: block;
  background: var(--ink);
  color: var(--chalk);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: calc(var(--header-h) + clamp(36px, 7vw, 76px)) 0 clamp(44px, 7vw, 88px);
  background:
    radial-gradient(110% 80% at 8% 0%, rgba(46, 211, 198, 0.10), transparent 62%),
    linear-gradient(158deg, var(--ink) 0%, var(--ink-2) 58%, #0c2136 100%);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -12%;
  bottom: -38%;
  width: 72%;
  height: 150%;
  background: linear-gradient(140deg, rgba(30, 122, 80, 0.26), rgba(30, 122, 80, 0) 72%);
  clip-path: polygon(28% 100%, 100% 0, 100% 100%);
  pointer-events: none;
}

.page-faq .faq-hero .container {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero .eyebrow {
  margin: 22px 0 0;
}

.page-faq .faq-hero__title {
  margin: 16px 0 0;
  max-width: 16ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(36px, 7vw, 84px);
  line-height: 1.02;
  letter-spacing: 0.01em;
  color: var(--chalk);
}

.page-faq .faq-hero__lede {
  margin: 22px 0 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.4vw, 18px);
  line-height: 1.78;
  color: var(--faq-muted);
}

/* ---------- 三条速答 ---------- */

.page-faq .faq-fast {
  padding: clamp(42px, 6vw, 76px) 0 clamp(14px, 2.5vw, 24px);
  background: var(--ink);
}

.page-faq .faq-fast__title {
  margin: 0 0 clamp(18px, 3vw, 30px);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(23px, 3vw, 34px);
  letter-spacing: 0.04em;
  color: var(--chalk);
}

.page-faq .faq-fast__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-faq .faq-fast-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 22px 22px;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  background: linear-gradient(150deg, rgba(18, 41, 63, 0.92), rgba(10, 26, 43, 0.92));
  transition: transform 0.32s var(--ease-out), border-color 0.32s var(--ease-out);
}

.page-faq .faq-fast-card::before {
  content: "";
  position: absolute;
  left: 22px;
  right: 22px;
  top: 0;
  height: 2px;
  background: var(--turf);
  opacity: 0.55;
  transition: opacity 0.32s var(--ease-out);
}

.page-faq .faq-fast-card__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--signal-soft);
}

.page-faq .faq-fast-card__title {
  margin: 2px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 21px;
  letter-spacing: 0.05em;
  color: var(--chalk);
}

.page-faq .faq-fast-card__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--faq-muted);
}

/* ---------- 问答主体 ---------- */

.page-faq .faq-body {
  padding: clamp(26px, 4vw, 48px) 0 clamp(60px, 9vw, 130px);
  background: var(--ink);
}

.page-faq .faq-body__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 2.8vw, 32px);
  letter-spacing: 0.04em;
  color: var(--chalk);
}

.page-faq .faq-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 clamp(28px, 4vw, 48px);
}

.page-faq .faq-toc__link {
  display: inline-block;
  padding: 8px 14px;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  background: rgba(18, 41, 63, 0.5);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--chalk);
  text-decoration: none;
  transition: color 0.28s var(--ease-out), background 0.28s var(--ease-out), border-color 0.28s var(--ease-out);
}

.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  color: var(--carbon);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-faq .faq-group {
  padding: clamp(26px, 4vw, 46px) 0;
  border-top: 1px solid var(--faq-line);
  scroll-margin-top: calc(var(--header-h) + 28px);
  transition: border-color 0.4s var(--ease-out);
}

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

.page-faq .faq-group:target {
  border-top-color: rgba(46, 211, 198, 0.5);
}

.page-faq .faq-group:target .faq-group__num {
  color: var(--signal);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: clamp(14px, 2vw, 22px);
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(26px, 3.6vw, 42px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--faq-turf-read);
  transition: color 0.4s var(--ease-out);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(21px, 2.6vw, 30px);
  letter-spacing: 0.05em;
  color: var(--chalk);
}

.page-faq .faq-group__split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-faq .faq-group__list {
  min-width: 0;
}

/* ---------- 折叠面板 ---------- */

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

.page-faq .faq-item__q {
  position: relative;
  display: block;
  padding: 15px 44px 15px 18px;
  font-size: clamp(15px, 1.5vw, 17px);
  font-weight: 600;
  line-height: 1.65;
  color: var(--chalk);
  cursor: pointer;
  list-style: none;
  transition: color 0.28s var(--ease-out);
}

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

.page-faq .faq-item__q::marker {
  content: "";
}

.page-faq .faq-item__q::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 2px;
  background: var(--faq-line-strong);
  transition: background 0.32s var(--ease-out);
}

.page-faq .faq-item__q::after {
  content: "";
  position: absolute;
  right: 16px;
  top: 22px;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--grey);
  border-bottom: 2px solid var(--grey);
  transform: rotate(45deg);
  transition: transform 0.3s var(--ease-out), border-color 0.3s var(--ease-out);
}

.page-faq .faq-item[open] > .faq-item__q::before {
  background: var(--faq-turf-read);
}

.page-faq .faq-item[open] > .faq-item__q::after {
  transform: rotate(-135deg);
  border-color: var(--faq-turf-read);
}

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

.page-faq .faq-item__a {
  margin: 0;
  padding: 0 44px 16px 18px;
  max-width: 72ch;
  font-size: 15px;
  line-height: 1.76;
  color: var(--faq-muted);
}

/* ---------- 配图 ---------- */

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

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

.page-faq .faq-figure figcaption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--grey);
}

/* ---------- 兜底入口 ---------- */

.page-faq .faq-fallback {
  padding: clamp(46px, 7vw, 104px) 0 clamp(60px, 9vw, 128px);
  background:
    radial-gradient(92% 100% at 88% 100%, rgba(30, 122, 80, 0.32), transparent 64%),
    var(--ink);
}

.page-faq .faq-fallback__card {
  padding: clamp(24px, 4vw, 52px);
}

.page-faq .faq-fallback__card .eyebrow {
  margin: 0;
}

.page-faq .faq-fallback__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(25px, 3.6vw, 44px);
  line-height: 1.1;
  letter-spacing: 0.03em;
  color: var(--chalk);
}

.page-faq .faq-fallback__text {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--faq-muted);
}

.page-faq .faq-fallback__text a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-fallback__contacts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-fallback__contacts li {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 14px;
  padding-top: 10px;
  border-top: 1px solid var(--faq-line);
  font-size: 15px;
  line-height: 1.6;
  color: var(--chalk);
  word-break: break-word;
}

.page-faq .faq-fallback__contacts li > span:first-child {
  flex: 0 0 auto;
  min-width: 70px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--grey);
}

.page-faq .faq-fallback__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

/* ---------- hover / 响应式 ---------- */

@media (hover: hover) {
  .page-faq .faq-fast-card:hover {
    transform: translateY(-2px);
    border-color: rgba(46, 211, 198, 0.36);
  }

  .page-faq .faq-fast-card:hover::before {
    opacity: 1;
  }

  .page-faq .faq-item__q:hover {
    color: #ffffff;
  }

  .page-faq .faq-item__q:hover::before {
    background: var(--faq-turf-read);
  }
}

@media (min-width: 720px) {
  .page-faq .faq-fallback__contacts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px 32px;
  }
}

@media (min-width: 780px) {
  .page-faq .faq-fast__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 940px) {
  .page-faq .faq-group__split {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.72fr);
    align-items: start;
    gap: clamp(32px, 5vw, 64px);
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-hero__lede {
    max-width: 56ch;
  }
}

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

  .page-faq .faq-fast-card:hover {
    transform: none;
  }
}