.page-faq {
  --faq-rail-w: 236px;
  background: var(--ink);
  color: var(--ice);
}

/* ---------- 顶部横幅 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink-deep);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero__media {
  position: absolute;
  inset: 0;
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
  opacity: .34;
}

.page-faq .faq-hero__veil {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(120% 90% at 6% 0%, rgba(23, 225, 203, .24), transparent 58%),
    radial-gradient(90% 80% at 94% 100%, rgba(243, 178, 63, .22), transparent 60%),
    linear-gradient(180deg, rgba(8, 23, 42, .52), rgba(8, 23, 42, .96));
}

.page-faq .faq-hero__inner {
  position: relative;
  padding-top: 56px;
  padding-bottom: 44px;
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-size: clamp(30px, 7vw, 52px);
  line-height: 1.16;
  font-weight: 800;
  letter-spacing: -.02em;
  max-width: 640px;
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 640px;
  color: var(--mist);
}

.page-faq .faq-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-stats li {
  position: relative;
  padding-left: 14px;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--mist);
}

.page-faq .faq-stats li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 6px;
  height: 1px;
  background: var(--cyan);
  transform: translateY(-50%);
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumbs {
  padding-top: 18px;
  padding-bottom: 4px;
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-body {
  padding-top: 26px;
  padding-bottom: 72px;
}

.page-faq .faq-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  align-items: start;
}

/* ---------- 左侧分类标尺 ---------- */
.page-faq .faq-rail {
  border: 1px solid var(--line);
  background: var(--ink-2);
  padding: 14px;
}

.page-faq .faq-rail__title {
  margin: 0;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--gold);
  font-family: var(--font-mono);
  text-transform: uppercase;
}

.page-faq .faq-rail__list {
  display: flex;
  gap: 8px;
  margin: 12px 0 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

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

.page-faq .faq-rail__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 11px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  color: var(--mist);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}

.page-faq .faq-rail__link .mono {
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--cyan-dim);
}

.page-faq .faq-rail__link:hover {
  color: var(--ice);
  border-color: var(--cyan);
}

.page-faq .faq-rail__link[aria-current="true"] {
  color: var(--ice);
  border-color: var(--gold);
  background: rgba(243, 178, 63, .12);
}

.page-faq .faq-rail__link[aria-current="true"] .mono {
  color: var(--gold-lt);
}

/* ---------- 筛选条 ---------- */
.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.page-faq .faq-filter .filter-btn.is-active {
  border-color: var(--cyan);
  color: var(--ink);
  background: var(--cyan);
}

/* ---------- 问答流 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 18px;
}

.page-faq .faq-group {
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: rgba(27, 58, 87, .34);
  scroll-margin-top: 112px;
  transition: border-color .24s var(--ease);
}

.page-faq .faq-group.is-hidden {
  display: none;
}

.page-faq .faq-group__head {
  display: grid;
  gap: 8px;
  padding: 20px 18px 16px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__code {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--gold);
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-size: 21px;
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -.01em;
}

.page-faq .faq-group__brief {
  margin: 0;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-group__figure {
  margin: 0;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: contain;
  border: 1px solid var(--line);
  background: var(--ink-deep);
}

.page-faq .faq-group__figure .media-caption {
  margin: 10px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 折叠条目 ---------- */
.page-faq .faq-item {
  border-top: 1px solid var(--line);
}

.page-faq .faq-item:first-child {
  border-top: 0;
}

.page-faq .faq-item summary {
  position: relative;
  display: block;
  padding: 15px 18px 15px 46px;
  list-style: none;
  cursor: pointer;
  font-size: 15px;
  line-height: 1.6;
  font-weight: 600;
  color: var(--ice);
  transition: color .2s var(--ease), background .2s var(--ease);
}

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

.page-faq .faq-item summary::before {
  content: "+";
  position: absolute;
  left: 18px;
  top: 14px;
  width: 18px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1.5;
  color: var(--cyan);
  transition: color .2s var(--ease);
}

.page-faq .faq-item summary:hover {
  background: rgba(23, 225, 203, .06);
  color: var(--cyan);
}

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

.page-faq .faq-item[open] summary::before {
  content: "\2013";
  color: var(--gold);
}

.page-faq .faq-item__body {
  padding: 0 18px 18px 46px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-item__body p {
  margin: 0 0 10px;
}

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

.page-faq .faq-item__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(23, 225, 203, .4);
}

.page-faq .faq-item__body a:hover {
  border-bottom-color: var(--cyan);
}

.page-faq .k {
  color: var(--ice);
  border-bottom: 1px solid rgba(243, 178, 63, .62);
  padding-bottom: 1px;
}

/* ---------- 页尾去向 ---------- */
.page-faq .faq-next {
  margin-top: 28px;
  padding: 20px 18px;
  border: 1px dashed var(--line-strong);
  background: rgba(18, 41, 63, .7);
}

.page-faq .faq-next h2 {
  margin: 0 0 14px;
  font-size: 18px;
  font-weight: 700;
}

.page-faq .faq-next__list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-next__list a {
  display: block;
  padding: 12px 14px;
  border: 1px solid var(--line);
  color: var(--ice);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: border-color .2s var(--ease), background .2s var(--ease);
}

.page-faq .faq-next__list a:hover {
  border-color: var(--cyan);
  background: rgba(23, 225, 203, .08);
}

.page-faq .faq-next__list span {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-group__head {
    padding: 22px 22px 18px;
  }

  .page-faq .faq-group__figure {
    padding: 18px 22px;
  }

  .page-faq .faq-item summary {
    padding: 16px 22px 16px 50px;
  }

  .page-faq .faq-item summary::before {
    left: 20px;
  }

  .page-faq .faq-item__body {
    padding: 0 22px 20px 50px;
  }

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

@media (min-width: 1000px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: 40px;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 76px;
    padding: 18px 16px;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 4px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-rail__link {
    border-color: transparent;
    border-left: 2px solid var(--line);
    border-radius: 0;
    padding: 8px 10px 8px 12px;
  }

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

  .page-faq .faq-rail__link[aria-current="true"] {
    border-color: transparent;
    border-left-color: var(--gold);
    background: rgba(243, 178, 63, .1);
  }

  .page-faq .faq-hero__inner {
    padding-top: 76px;
    padding-bottom: 60px;
  }
}
<<<END>>>