/* ===== 常见问题页 · page-faq ===== */
.page-faq {
  --faq-rail: 232px;
  --faq-warm: #FFF4EC;
  --faq-tint: #EAF2F9;
  background: var(--snow);
  color: var(--ink);
  font-family: var(--font-body);
}

/* ---- 首屏 ---- */
.page-faq .faq-hero {
  position: relative;
  padding-top: 22px;
  background:
    radial-gradient(115% 80% at 88% -12%, rgba(88, 184, 232, .20), transparent 62%),
    linear-gradient(180deg, #F1F8FD 0%, var(--snow) 100%);
  border-bottom: 1px solid var(--line-light);
}

.page-faq .faq-hero .breadcrumbs {
  margin-bottom: 18px;
}

.page-faq .faq-hero__intro {
  max-width: 820px;
  padding-bottom: 26px;
}

.page-faq .faq-hero__intro .eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ice-blue);
  margin: 0 0 12px;
}

.page-faq .faq-hero__intro h1 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(30px, 5.1vw, 58px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
  color: var(--ink);
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 40em;
  font-size: var(--fs-body);
  line-height: 1.78;
  color: var(--graphite);
}

.page-faq .faq-meter {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 4px;
  height: 5px;
  margin: 0 0 24px;
}

.page-faq .faq-meter span {
  border-radius: 1px;
  background: var(--ice-blue);
  opacity: .24;
}

.page-faq .faq-meter span:nth-child(1),
.page-faq .faq-meter span:nth-child(2) {
  opacity: 1;
}

.page-faq .faq-hero__figure {
  position: relative;
  display: block;
  margin: 0;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--glacier);
}

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

/* ---- 主体布局 ---- */
.page-faq .faq-body {
  padding: 44px 0 76px;
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  align-items: start;
}

/* ---- 左侧分类锚点 ---- */
.page-faq .faq-rail__title {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--graphite);
  margin: 0 0 12px;
}

.page-faq .faq-rail__nav ul {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-rail__nav li {
  flex: 0 0 auto;
}

.page-faq .faq-rail__link {
  display: block;
  white-space: nowrap;
  padding: 8px 14px;
  font-size: var(--fs-sm);
  line-height: 1.4;
  color: var(--graphite);
  text-decoration: none;
  background: #FFFFFF;
  border: 1px solid var(--mist);
  border-radius: var(--pill);
  transition: color var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease),
              background var(--t-fast) var(--ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--ice-blue);
  border-color: var(--ice-bright);
  background: var(--faq-tint);
}

/* ---- 问题分组 ---- */
.page-faq .faq-group {
  scroll-margin-top: 96px;
  padding-bottom: 40px;
}

.page-faq .faq-group + .faq-group {
  padding-top: 40px;
  border-top: 1px solid var(--line-light);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 18px;
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: .12em;
  color: var(--orange);
  flex: 0 0 auto;
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: var(--fs-h3);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--ink);
}

/* ---- 问答条目 ---- */
.page-faq .qa-list {
  display: grid;
  gap: 10px;
}

.page-faq .qa {
  border: 1px solid var(--mist);
  border-left: 3px solid var(--mist);
  background: #FFFFFF;
  transition: background var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease);
}

.page-faq .qa[open] {
  background: var(--faq-warm);
  border-color: var(--orange-soft);
  border-left-color: var(--orange);
}

.page-faq .qa > summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 14px;
  align-items: start;
  padding: 16px 18px;
  font-size: var(--fs-body);
  font-weight: 600;
  line-height: 1.55;
  color: var(--ink);
}

.page-faq .qa > summary::-webkit-details-marker {
  display: none;
}

.page-faq .qa > summary::marker {
  content: "";
}

.page-faq .qa__idx {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: .06em;
  color: var(--graphite);
  padding-top: 5px;
}

.page-faq .qa[open] .qa__idx {
  color: var(--orange);
}

.page-faq .qa__ind {
  width: 11px;
  height: 11px;
  margin-top: 7px;
  border: 2px solid var(--orange);
  border-right: 0;
  border-top: 0;
  transform: rotate(-45deg);
  transition: transform var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease);
}

.page-faq .qa[open] .qa__ind {
  transform: rotate(135deg);
  border-color: var(--orange-soft);
}

.page-faq .qa__a {
  padding: 0 18px 18px 18px;
}

.page-faq .qa[open] .qa__a {
  animation: faq-slide-in var(--t-mid) var(--ease) both;
}

.page-faq .qa__a p {
  margin: 0 0 10px;
  max-width: 38em;
  font-size: 16px;
  line-height: 1.78;
  color: var(--graphite);
}

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

.page-faq .faq-field {
  font-family: var(--font-mono);
  font-size: .88em;
  color: var(--ice-blue);
  background: var(--faq-tint);
  border: 1px solid rgba(27, 111, 168, .24);
  border-radius: 3px;
  padding: 0 5px;
  white-space: nowrap;
}

@keyframes faq-slide-in {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---- 字段示意配图 ---- */
.page-faq .faq-fieldfig {
  margin: 26px 0 0;
  background: var(--faq-tint);
  border: 1px solid var(--mist);
}

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

.page-faq .faq-fieldfig .figure-caption {
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: .04em;
  line-height: 1.6;
  color: var(--graphite);
  border-top: 1px solid var(--mist);
}

/* ---- 收尾联系区 ---- */
.page-faq .faq-help {
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(27, 111, 168, .40), transparent 60%),
    var(--ice-night);
  color: var(--snow);
  padding: 52px 0 60px;
}

.page-faq .faq-help__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  align-items: end;
}

.page-faq .faq-help__eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--orange-soft);
}

.page-faq .faq-help h2 {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(26px, 3.4vw, 40px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--snow);
}

.page-faq .faq-help__copy p {
  margin: 0;
  max-width: 36em;
  font-size: var(--fs-body);
  line-height: 1.75;
  color: var(--mist);
}

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

/* ---- 平板与桌面 ---- */
@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding-top: 30px;
  }

  .page-faq .faq-hero__figure {
    aspect-ratio: 1920 / 600;
  }

  .page-faq .faq-body {
    padding: 56px 0 96px;
  }

  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: 56px;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 104px;
  }

  .page-faq .faq-rail__nav ul {
    flex-direction: column;
    overflow: visible;
    gap: 0;
    padding-bottom: 0;
    border-left: 1px solid var(--line-light);
  }

  .page-faq .faq-rail__nav li {
    flex: 1 1 auto;
  }

  .page-faq .faq-rail__link {
    border-radius: 0;
    border: 0;
    border-left: 2px solid transparent;
    margin-left: -1px;
    padding: 10px 12px;
    background: transparent;
    white-space: normal;
    transition: color var(--t-fast) var(--ease),
                border-color var(--t-fast) var(--ease);
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    background: transparent;
    color: var(--ice-blue);
    border-left-color: var(--ice-bright);
  }

  .page-faq .qa > summary {
    padding: 18px 22px;
    font-size: var(--fs-lg);
  }

  .page-faq .qa__a {
    padding: 0 22px 20px 58px;
  }

  .page-faq .faq-fieldfig {
    margin-top: 32px;
  }

  .page-faq .faq-help {
    padding: 64px 0 72px;
  }

  .page-faq .faq-help__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 48px;
  }

  .page-faq .faq-help__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-layout {
    gap: 72px;
  }
}

/* ---- 动效降级 ---- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .qa[open] .qa__a {
    animation: none;
  }

  .page-faq .qa,
  .page-faq .qa__ind,
  .page-faq .faq-rail__link {
    transition: none;
  }
}