.page-faq {
  --faq-rail-w: 234px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: clamp(20px, 4vw, 34px);
  padding-block: clamp(24px, 5vw, 52px) clamp(22px, 3.5vw, 38px);
}

.page-faq .faq-hero__lead {
  display: flex;
  flex-direction: column;
  gap: 13px;
  order: 2;
  min-width: 0;
}

.page-faq .faq-hero__lead h1 {
  margin: 0;
  font-size: clamp(28px, 6vw, 46px);
  line-height: 1.18;
  letter-spacing: -0.015em;
  color: var(--cream);
}

.page-faq .faq-hero__intro {
  margin: 0;
  max-width: 44em;
  font-size: 16px;
  line-height: 1.82;
  color: rgba(244, 241, 232, 0.76);
}

.page-faq .faq-hero__ring {
  position: relative;
  order: 1;
  justify-self: start;
  width: 104px;
  height: 104px;
  display: grid;
  place-items: center;
}

.page-faq .faq-hero__ring svg {
  width: 100%;
  height: 100%;
  display: block;
}

.page-faq .faq-hero__ring-label {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 16px;
  letter-spacing: 0.05em;
  color: var(--cyan);
}

/* ---------- 主体分栏 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(22px, 4vw, 42px);
  padding-bottom: clamp(46px, 7vw, 88px);
  align-items: start;
}

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

.page-faq .faq-rail__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--stone);
}

.page-faq .faq-rail nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 3px 2px 9px;
  scrollbar-width: thin;
}

.page-faq .faq-rail__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border-radius: var(--pill);
  border: 1px solid var(--line);
  background: var(--panel-deep);
  color: var(--cream);
  font-size: 14px;
  line-height: 1.2;
  white-space: nowrap;
  text-decoration: none;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .faq-rail__link::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--clay);
  flex: 0 0 auto;
}

.page-faq .faq-rail__link--moss::before {
  background: var(--moss);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(47, 230, 208, 0.07);
}

/* ---------- 分组 ---------- */
.page-faq .faq-body {
  min-width: 0;
}

.page-faq .faq-group {
  margin-bottom: clamp(38px, 5.5vw, 68px);
}

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

.page-faq .faq-group__head {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding-bottom: 14px;
  margin-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__no {
  flex: 0 0 auto;
  font-family: var(--font-display);
  font-size: clamp(34px, 6vw, 44px);
  font-weight: 700;
  line-height: 0.86;
  letter-spacing: -0.02em;
  color: var(--stone);
  opacity: 0.5;
}

.page-faq .faq-group__head h2 {
  margin: 0 0 7px;
  font-size: clamp(22px, 3.4vw, 30px);
  line-height: 1.25;
  color: var(--cream);
}

.page-faq .faq-group__desc {
  margin: 0;
  max-width: 46em;
  font-size: 15px;
  line-height: 1.72;
  color: var(--stone);
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 22px;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--r-lg);
  object-fit: cover;
}

.page-faq .faq-group__split {
  display: grid;
  gap: 20px;
}

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

/* ---------- 问答 ---------- */
.page-faq .qa-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
}

.page-faq .qa {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--panel-deep);
  overflow: hidden;
  transition: border-color 0.22s var(--ease), background 0.22s var(--ease), box-shadow 0.22s var(--ease);
}

.page-faq .qa[open] {
  border-color: rgba(47, 230, 208, 0.42);
  background: var(--panel);
  box-shadow: inset 3px 0 0 0 var(--cyan);
}

.page-faq .qa__q {
  position: relative;
  cursor: pointer;
  list-style: none;
  padding: 15px 52px 15px 18px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--cream);
  transition: color 0.2s var(--ease);
}

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

.page-faq .qa__q::before {
  content: "";
  position: absolute;
  right: 18px;
  top: 50%;
  width: 13px;
  height: 2px;
  margin-top: -1px;
  border-radius: 2px;
  background: var(--stone);
  transition: background 0.2s var(--ease);
}

.page-faq .qa__q::after {
  content: "";
  position: absolute;
  right: 23.5px;
  top: 50%;
  width: 2px;
  height: 13px;
  margin-top: -6.5px;
  border-radius: 2px;
  background: var(--stone);
  transition: opacity 0.2s var(--ease), background 0.2s var(--ease);
}

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

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

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

.page-faq .qa[open] .qa__q::after {
  opacity: 0;
}

.page-faq .qa__a {
  padding: 14px 20px 19px 21px;
  margin: 0;
  border-top: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.9;
  color: rgba(244, 241, 232, 0.76);
}

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

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

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

.page-faq .qa[open] .qa__a {
  animation: faq-answer-in 0.22s var(--ease) both;
}

@keyframes faq-answer-in {
  from {
    opacity: 0;
    transform: translateY(-5px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 底部去向 ---------- */
.page-faq .faq-next {
  padding-block: 0 clamp(50px, 7vw, 92px);
}

.page-faq .faq-next__body {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 4vw, 40px);
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  background:
    radial-gradient(120% 150% at 100% 0%, rgba(255, 122, 47, 0.14) 0%, rgba(255, 122, 47, 0) 55%),
    linear-gradient(160deg, rgba(19, 43, 68, 0.78) 0%, rgba(10, 26, 42, 0.72) 100%);
}

.page-faq .faq-next__body h2 {
  margin: 0 0 10px;
  font-size: clamp(21px, 3.4vw, 28px);
  line-height: 1.28;
  color: var(--cream);
}

.page-faq .faq-next__body > p {
  margin: 0;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 241, 232, 0.76);
}

.page-faq .faq-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: clamp(28px, 4vw, 48px);
  }

  .page-faq .faq-hero__ring {
    order: 2;
    justify-self: end;
    width: 132px;
    height: 132px;
  }

  .page-faq .faq-hero__lead {
    order: 1;
  }

  .page-faq .faq-hero__ring-label {
    font-size: 19px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: clamp(34px, 4vw, 56px);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--nav-h) + 22px);
  }

  .page-faq .faq-rail nav {
    flex-direction: column;
    gap: 7px;
    overflow-x: visible;
    padding: 0;
  }

  .page-faq .faq-rail__link {
    width: 100%;
    justify-content: flex-start;
    padding: 11px 14px;
    border-radius: var(--r-md);
    border-left: 3px solid var(--clay);
    font-size: 15px;
  }

  .page-faq .faq-rail__link::before {
    display: none;
  }

  .page-faq .faq-rail__link--moss {
    border-left-color: var(--moss);
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    border-left-color: var(--cyan);
  }

  .page-faq .qa__q {
    padding: 17px 56px 17px 22px;
    font-size: 16.5px;
  }

  .page-faq .qa__a {
    padding: 16px 24px 22px 25px;
    font-size: 15px;
    line-height: 1.92;
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-group__split {
    grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
    gap: 26px;
    align-items: start;
  }

  .page-faq .faq-figure--side {
    position: sticky;
    top: calc(var(--nav-h) + 22px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa[open] .qa__a {
    animation: none;
  }
}
</final>