.page-faq {
  --faq-rail-w: 236px;
  --faq-line-red: rgba(179, 39, 45, .55);
  display: block;
  background: var(--ink-900);
  color: var(--ivory);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 44px 0 56px;
  background:
    radial-gradient(110% 82% at 88% 0%, rgba(30, 95, 122, .55) 0%, rgba(6, 18, 31, 0) 62%),
    radial-gradient(92% 88% at 0% 112%, rgba(59, 42, 99, .55) 0%, rgba(6, 18, 31, 0) 60%),
    var(--ink-900);
}

.page-faq .faq-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .24;
}

.page-faq .faq-hero__veil {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(6, 18, 31, .35) 0%, rgba(6, 18, 31, .8) 62%, var(--ink-900) 100%);
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 2;
  padding-inline: clamp(20px, 5vw, 40px);
}

.page-faq .faq-hero .crumbs {
  margin: 0 0 26px;
}

.page-faq .faq-hero h1 {
  margin: 16px 0 0;
  max-width: 18ch;
  font-size: clamp(34px, 7.4vw, 68px);
  line-height: 1.05;
  font-weight: 900;
  letter-spacing: -.022em;
}

.page-faq .faq-hero__lead {
  margin: 22px 0 0;
  max-width: 60ch;
  font-size: 17px;
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .faq-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 24px;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--line-gold);
}

.page-faq .faq-fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-faq .faq-fact__num {
  font-size: 34px;
  line-height: 1;
  color: var(--gold);
}

.page-faq .faq-fact__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 主体网格 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 32px clamp(20px, 5vw, 40px) 88px;
}

/* ---------- 左侧章节导航 ---------- */
.page-faq .faq-rail {
  position: sticky;
  top: calc(var(--header-h) + 6px);
  z-index: 4;
  background: var(--ink-900);
  padding-bottom: 8px;
}

.page-faq .faq-rail__title {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .24em;
  color: var(--mist);
}

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

.page-faq .faq-rail__list a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--mist);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-faq .faq-rail__list a:hover,
.page-faq .faq-rail__list a:focus-visible {
  color: var(--gold-soft);
  border-color: var(--line-gold);
}

.page-faq .faq-rail__num {
  font-family: var(--font-serif);
  font-size: 12px;
  font-weight: 900;
  font-variant-numeric: tabular-nums;
  color: var(--gold);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  padding-top: 28px;
  border-top: 1px solid var(--faq-line-red);
}

.page-faq .faq-group + .faq-group {
  margin-top: 56px;
}

.page-faq .faq-group__kicker {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0;
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--mist);
}

.page-faq .faq-group__index {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 900;
  line-height: 1;
  letter-spacing: 0;
  font-variant-numeric: tabular-nums;
  color: var(--gold);
}

.page-faq .faq-group h2 {
  margin: 12px 0 0;
  max-width: 24ch;
  font-size: clamp(24px, 4.4vw, 36px);
  line-height: 1.18;
  font-weight: 800;
  letter-spacing: -.018em;
}

.page-faq .faq-group__intro {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-group__list {
  margin-top: 22px;
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
}

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

.page-faq .faq-item > summary {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr) 22px;
  gap: 12px;
  align-items: start;
  padding: 20px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--gold-soft);
  outline-offset: 4px;
}

.page-faq .faq-item__num {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 900;
  line-height: 1.5;
  font-variant-numeric: tabular-nums;
  color: var(--gold);
}

.page-faq .faq-item__q {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ivory);
  transition: color .18s var(--ease);
}

.page-faq .faq-item > summary:hover .faq-item__q {
  color: var(--gold-soft);
}

.page-faq .faq-item__arrow {
  position: relative;
  width: 22px;
  height: 22px;
  margin-top: 3px;
  border: 1px solid var(--line-gold);
  border-radius: 50%;
  transition: transform .22s var(--ease), background-color .22s var(--ease);
}

.page-faq .faq-item__arrow::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 7px;
  height: 7px;
  border-right: 1.5px solid var(--gold);
  border-bottom: 1.5px solid var(--gold);
  transform: translate(-50%, -70%) rotate(45deg);
}

.page-faq .faq-item[open] .faq-item__arrow {
  transform: rotate(180deg);
  background: rgba(201, 162, 39, .14);
}

.page-faq .faq-item__body {
  padding: 0 0 24px;
  max-width: 68ch;
  font-size: 17px;
  line-height: 1.78;
  color: var(--mist);
}

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

.page-faq .faq-item__body a {
  color: var(--gold-soft);
  text-underline-offset: 4px;
}

.page-faq .faq-tip {
  padding: 12px 16px;
  border-left: 2px solid var(--jade);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: rgba(30, 95, 122, .2);
  color: var(--ivory);
}

.page-faq .faq-result {
  margin-top: 14px;
  padding: 10px 0 10px 14px;
  border-left: 2px solid var(--gold);
  color: var(--ivory);
  font-size: 16px;
}

.page-faq .faq-result strong {
  color: var(--gold-soft);
  font-weight: 800;
}

/* ---------- 三步校验 ---------- */
.page-faq .faq-steps {
  display: grid;
  gap: 14px;
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-steps li {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.page-faq .faq-steps__n {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 900;
  line-height: 1.05;
  font-variant-numeric: tabular-nums;
  color: var(--gold-soft);
}

.page-faq .faq-steps span:last-child {
  padding-top: 3px;
  color: var(--ivory);
}

/* ---------- 嵌套排查 ---------- */
.page-faq .faq-fallback {
  margin-top: 18px;
  padding: 0 16px;
  border: 1px dashed rgba(179, 39, 45, .55);
  border-radius: var(--radius);
  background: rgba(110, 31, 43, .16);
}

.page-faq .faq-fallback > summary {
  padding: 12px 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--gold-soft);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-fallback > summary::after {
  content: " +";
  font-weight: 900;
  color: var(--cinnabar);
}

.page-faq .faq-fallback[open] > summary::after {
  content: " −";
}

.page-faq .faq-fallback ul {
  margin: 0 0 16px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-faq .faq-fallback li {
  position: relative;
  padding-left: 18px;
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--ivory);
}

.page-faq .faq-fallback li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 8px;
  height: 1px;
  background: var(--cinnabar);
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 26px 0 4px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(135deg, var(--ink-700), var(--indigo));
}

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

.page-faq .faq-figure__cap {
  padding: 12px 18px 14px;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--mist);
}

/* ---------- 联系面板 ---------- */
.page-faq .faq-contact {
  margin-top: 26px;
  padding: 24px;
}

.page-faq .faq-contact__lead {
  margin: 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ivory);
}

.page-faq .faq-contact__list {
  display: grid;
  gap: 16px;
  margin: 20px 0 0;
}

.page-faq .faq-contact__list dt {
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--mist);
}

.page-faq .faq-contact__list dd {
  margin: 5px 0 0;
  font-size: 17px;
  line-height: 1.6;
  color: var(--ivory);
  overflow-wrap: anywhere;
}

.page-faq .faq-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 22px 0 0;
}

/* ---------- 桌面布局 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-item > summary {
    grid-template-columns: 46px minmax(0, 1fr) 22px;
    gap: 16px;
    padding: 24px 0;
  }

  .page-faq .faq-item__q {
    font-size: 20px;
  }

  .page-faq .faq-item__body {
    padding-left: 62px;
  }

  .page-faq .faq-contact__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-hero {
    padding: 64px 0 80px;
  }

  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: 64px;
    padding-top: 72px;
  }

  .page-faq .faq-rail {
    align-self: start;
    padding-bottom: 0;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--line);
  }

  .page-faq .faq-rail__list a {
    padding: 11px 14px 11px 16px;
    margin-left: -1px;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    white-space: normal;
  }

  .page-faq .faq-rail__list a:hover,
  .page-faq .faq-rail__list a:focus-visible {
    background: rgba(30, 95, 122, .24);
    border-left-color: var(--gold);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__arrow,
  .page-faq .faq-item__q,
  .page-faq .faq-rail__list a {
    transition-duration: .001ms !important;
  }
}