.page-faq {
  --faq-surface: var(--lb-bg-800);
  --faq-edge: var(--lb-line);
  --faq-muted: var(--lb-slate);
  --faq-strong: var(--lb-neon);
  --faq-alert: var(--lb-orange);
  --faq-text: var(--lb-text);
  --faq-soft: var(--lb-soft);
  --faq-indent: 46px;
}

/* ---------- 首屏框景 ---------- */
.page-faq .faq-hero {
  padding: var(--lb-s3) 0 var(--lb-s2);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: var(--lb-s3);
  align-items: center;
}

.page-faq .faq-hero__intro {
  position: relative;
  padding: var(--lb-s2) var(--lb-s2) var(--lb-s2) calc(var(--lb-s2) + 10px);
  border: 1px solid var(--faq-edge);
  background:
    linear-gradient(160deg, rgba(76, 107, 255, 0.12), rgba(10, 15, 44, 0) 62%),
    var(--faq-surface);
  border-radius: var(--lb-radius);
}

.page-faq .faq-hero__intro::before {
  content: "";
  position: absolute;
  left: -1px;
  top: -1px;
  width: 3px;
  height: 64px;
  background: var(--faq-strong);
}

.page-faq .faq-hero__intro::after {
  content: "";
  position: absolute;
  right: 12px;
  bottom: 10px;
  width: 74px;
  height: 10px;
  background-image: repeating-linear-gradient(90deg, var(--faq-muted) 0 1px, transparent 1px 8px);
  opacity: 0.55;
}

.page-faq .faq-hero__lead {
  max-width: 46ch;
  color: var(--faq-soft);
}

.page-faq .faq-hero__facts {
  list-style: none;
  margin: var(--lb-s3) 0 0;
  padding: 0;
  display: grid;
  gap: var(--lb-s2);
}

.page-faq .faq-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-left: 12px;
  border-left: 2px solid var(--faq-edge);
}

.page-faq .faq-hero__num {
  font-size: 20px;
  color: var(--faq-strong);
  font-weight: 700;
}

.page-faq .faq-hero__cap {
  font-size: 14px;
  color: var(--faq-soft);
}

.page-faq .faq-hero__figure {
  margin: 0;
  padding: var(--lb-s1);
  border: 1px solid var(--faq-edge);
  background: var(--faq-surface);
  border-radius: var(--lb-radius);
}

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

.page-faq .faq-hero__figure .lb-media__cap {
  padding: var(--lb-s1) 2px 2px;
  font-size: 12.5px;
  color: var(--faq-muted);
  line-height: 1.6;
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: var(--lb-s3);
  padding: var(--lb-s2) 0 var(--lb-s3);
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-index {
  border: 1px solid var(--faq-edge);
  background: var(--faq-surface);
  border-radius: var(--lb-radius);
  padding: var(--lb-s2);
}

.page-faq .faq-index__title {
  margin: 0 0 var(--lb-s2);
  font-family: var(--lb-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--faq-muted);
  text-transform: uppercase;
}

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

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  white-space: nowrap;
  border: 1px solid var(--faq-edge);
  border-radius: var(--lb-radius);
  color: var(--faq-soft);
  text-decoration: none;
  font-size: 13.5px;
  transition: border-color 160ms ease, color 160ms ease, background-color 160ms ease;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-color: var(--faq-strong);
  color: var(--faq-text);
  background: rgba(77, 255, 155, 0.06);
}

.page-faq .faq-index__link.is-active {
  border-color: var(--faq-strong);
  color: var(--faq-text);
  background: rgba(77, 255, 155, 0.1);
}

.page-faq .faq-index__num {
  font-family: var(--lb-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--faq-muted);
}

.page-faq .faq-index__link.is-active .faq-index__num {
  color: var(--faq-strong);
}

.page-faq .faq-index__help {
  margin-top: var(--lb-s2);
  padding: var(--lb-s2);
  border: 1px dashed var(--faq-edge);
  border-radius: var(--lb-radius);
}

.page-faq .faq-index__help-label {
  margin: 0 0 8px;
  font-family: var(--lb-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--faq-alert);
}

.page-faq .faq-index__help-text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--faq-soft);
}

.page-faq .faq-index__help-btn {
  margin-top: var(--lb-s2);
  width: 100%;
  text-align: center;
}

/* ---------- 问题分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 140px;
}

.page-faq .faq-group + .faq-group {
  margin-top: var(--lb-s3);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--faq-edge);
  position: relative;
}

.page-faq .faq-group__head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 56px;
  height: 2px;
  background: var(--faq-strong);
}

.page-faq .faq-group__idx {
  font-size: 13px;
  color: var(--faq-alert);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: 20px;
  color: var(--faq-text);
}

.page-faq .faq-group__desc {
  margin: 12px 0 var(--lb-s2);
  font-size: 14px;
  line-height: 1.75;
  color: var(--faq-soft);
}

/* ---------- 可展开条目 ---------- */
.page-faq .faq-item {
  border: 1px solid var(--faq-edge);
  border-radius: var(--lb-radius);
  background: var(--faq-surface);
  margin-bottom: 8px;
  overflow: hidden;
}

.page-faq .faq-item[open] {
  border-color: rgba(77, 255, 155, 0.45);
  box-shadow: inset 3px 0 0 var(--faq-strong);
}

.page-faq .faq-item__head {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: start;
  gap: 10px;
  padding: 13px var(--lb-s2);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item__head:hover {
  background: rgba(76, 107, 255, 0.08);
}

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

.page-faq .faq-item__idx {
  font-size: 11.5px;
  color: var(--faq-muted);
  padding-top: 3px;
}

.page-faq .faq-item__q {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--faq-text);
}

.page-faq .faq-item__sign {
  position: relative;
  width: 16px;
  height: 16px;
  margin-top: 3px;
  border: 1px solid var(--faq-muted);
  border-radius: var(--lb-radius);
  flex: none;
}

.page-faq .faq-item__sign::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 8px;
  height: 1px;
  background: var(--faq-strong);
  transform: translate(-50%, -50%);
}

.page-faq .faq-item__sign::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 1px;
  height: 8px;
  background: var(--faq-strong);
  transform: translate(-50%, -50%);
}

.page-faq .faq-item[open] .faq-item__sign::after {
  display: none;
}

.page-faq .faq-item__body {
  padding: 0 var(--lb-s2) var(--lb-s2);
  border-top: 1px solid var(--faq-edge);
}

.page-faq .faq-item__answer {
  margin: var(--lb-s2) 0 var(--lb-s2);
  padding-left: 12px;
  border-left: 2px solid var(--faq-strong);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--faq-text);
}

.page-faq .faq-inline-link {
  color: var(--lb-focus);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-inline-link:hover,
.page-faq .faq-inline-link:focus-visible {
  color: var(--faq-strong);
}

/* ---------- 步骤清单 ---------- */
.page-faq .faq-steps {
  counter-reset: faqstep;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-steps li {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 10px;
  align-items: start;
  font-size: 14px;
  line-height: 1.7;
  color: var(--faq-soft);
}

.page-faq .faq-steps li::before {
  counter-increment: faqstep;
  content: counter(faqstep, decimal-leading-zero);
  font-family: var(--lb-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--faq-strong);
  border-right: 1px solid var(--faq-edge);
  padding-right: 8px;
  text-align: right;
  line-height: 1.7;
}

/* ---------- 勘误区布局 ---------- */
.page-faq .faq-errata__grid {
  display: grid;
  gap: var(--lb-s2);
}

.page-faq .faq-flow {
  margin: 0;
  padding: var(--lb-s1);
  border: 1px solid var(--faq-edge);
  background: var(--faq-surface);
  border-radius: var(--lb-radius);
  align-self: start;
}

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

.page-faq .faq-flow .lb-media__cap {
  padding: var(--lb-s1) 2px 2px;
  font-size: 12.5px;
  color: var(--faq-muted);
  line-height: 1.6;
}

/* ---------- 客服渠道 ---------- */
.page-faq .faq-contact {
  margin-top: var(--lb-s2);
  padding: var(--lb-s2);
  border: 1px solid var(--faq-edge);
  background:
    linear-gradient(120deg, rgba(18, 122, 97, 0.22), rgba(20, 28, 66, 0) 70%),
    var(--faq-surface);
  border-radius: var(--lb-radius);
}

.page-faq .faq-contact__label {
  margin: 0 0 var(--lb-s2);
  font-family: var(--lb-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--faq-strong);
  text-transform: uppercase;
}

.page-faq .faq-contact__row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px dashed var(--faq-edge);
}

.page-faq .faq-contact__key {
  font-family: var(--lb-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--faq-muted);
  min-width: 52px;
}

.page-faq .faq-contact__val {
  font-size: 14.5px;
  color: var(--faq-text);
  word-break: break-word;
}

.page-faq .faq-contact__note {
  margin: var(--lb-s2) 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--faq-soft);
}

/* ---------- 收尾 ---------- */
.page-faq .faq-outro {
  margin-top: var(--lb-s3);
  padding: var(--lb-s3) var(--lb-s2);
  border: 1px solid var(--faq-edge);
  border-left: 3px solid var(--faq-strong);
  background: var(--faq-surface);
  border-radius: var(--lb-radius);
}

.page-faq .faq-outro__title {
  margin: 0 0 10px;
  font-size: 18px;
  color: var(--faq-text);
}

.page-faq .faq-outro__text {
  margin: 0 0 var(--lb-s2);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--faq-soft);
  max-width: 52ch;
}

.page-faq .faq-outro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--lb-s2);
  }

  .page-faq .faq-hero {
    padding-bottom: var(--lb-s3);
  }

  .page-faq .faq-group__title {
    font-size: 22px;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: 1.08fr 0.92fr;
    gap: var(--lb-s3);
  }

  .page-faq .faq-errata__grid {
    grid-template-columns: 1.05fr 0.95fr;
  }

  .page-faq .faq-item__body {
    padding-left: var(--faq-indent);
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-layout {
    grid-template-columns: 240px minmax(0, 1fr);
    gap: var(--lb-s3);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 128px;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    overflow-x: visible;
    gap: 4px;
  }

  .page-faq .faq-index__link {
    width: 100%;
    justify-content: flex-start;
  }

  .page-faq .faq-index__num {
    min-width: 22px;
  }

  .page-faq .faq-group__title {
    font-size: 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__link {
    transition: none;
  }
}
<<<END>>>