.page-faq {
  --faq-rail: 272px;
  --faq-gap: clamp(24px, 3.4vw, 56px);
  --faq-line: var(--line-700);
  --faq-text: #C8D6D1;
  background: var(--ink-950);
  color: var(--paper-100);
  font-family: var(--font-body);
  font-size: var(--step-16);
  line-height: 1.75;
}

.page-faq .lp-container {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(53, 242, 208, 0.12), transparent 62%),
    radial-gradient(80% 70% at 0% 100%, rgba(255, 179, 71, 0.08), transparent 65%),
    var(--pitch-900);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(180deg, rgba(53, 242, 208, 0.055) 0 1px, transparent 1px 7px);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 30px;
  padding-block: clamp(28px, 5vw, 68px);
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 5.4vw, 58px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--paper-100);
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 46ch;
  color: var(--faq-text);
  font-size: var(--step-16);
  line-height: 1.8;
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-hero__figure {
  margin: 0;
}

.page-faq .faq-hero__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: var(--step-12);
  line-height: 1.6;
  color: var(--muted-400);
}

.page-faq .lp-media {
  display: block;
  border: 1px solid var(--faq-line);
  background: var(--pitch-800);
  overflow: hidden;
}

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

.page-faq .lp-breadcrumb__item,
.page-faq .lp-breadcrumb__item a {
  color: var(--muted-400);
  font-family: var(--font-mono);
  font-size: var(--step-12);
  letter-spacing: 0.04em;
  text-decoration: none;
}

.page-faq .lp-breadcrumb__item a:hover {
  color: var(--cyan-400);
}

.page-faq .lp-breadcrumb__item [aria-current="page"] {
  color: var(--cyan-200);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  padding-block: clamp(32px, 5vw, 76px);
  background:
    linear-gradient(180deg, rgba(18, 49, 42, 0.55), rgba(4, 16, 13, 0) 340px),
    var(--ink-950);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-body__inner {
  display: grid;
  gap: var(--faq-gap);
  align-items: start;
}

/* ---------- 快速索引 ---------- */
.page-faq .faq-rail {
  border: 1px solid var(--faq-line);
  background: var(--pitch-900);
  padding: 16px 14px 18px;
}

.page-faq .faq-rail__title {
  margin: 0 0 12px;
  padding-left: 8px;
  font-family: var(--font-mono);
  font-size: var(--step-12);
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan-400);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-rail__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 10px;
  align-items: baseline;
  padding: 10px 8px 10px 10px;
  border-left: 2px solid transparent;
  color: var(--paper-100);
  text-decoration: none;
  font-size: var(--step-14);
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-faq .faq-rail__no {
  font-family: var(--font-mono);
  font-size: var(--step-12);
  color: var(--amber-500);
  letter-spacing: 0.02em;
}

.page-faq .faq-rail__label {
  min-width: 0;
  overflow-wrap: anywhere;
}

.page-faq .faq-rail__count {
  font-family: var(--font-mono);
  font-size: var(--step-12);
  color: var(--muted-400);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible,
.page-faq .faq-rail__link[data-active="true"] {
  color: var(--cyan-200);
  border-left-color: var(--cyan-400);
  background: rgba(53, 242, 208, 0.07);
}

.page-faq .faq-rail__link[data-active="true"] .faq-rail__no {
  color: var(--cyan-400);
}

.page-faq .faq-rail__note {
  margin: 16px 0 0;
  padding: 12px 8px 0;
  border-top: 1px solid var(--faq-line);
  font-size: var(--step-12);
  line-height: 1.7;
  color: var(--muted-400);
}

/* ---------- 问答组 ---------- */
.page-faq .faq-flow {
  min-width: 0;
}

.page-faq .faq-group {
  margin-top: 36px;
  padding-top: 22px;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-group:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.page-faq .faq-group__title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--paper-100);
}

.page-faq .faq-group__num {
  flex: none;
  padding: 1px 7px;
  border: 1px solid var(--faq-line);
  font-family: var(--font-mono);
  font-size: var(--step-12);
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--cyan-400);
}

.page-faq .faq-group__lead {
  margin: 10px 0 18px;
  font-size: var(--step-14);
  line-height: 1.7;
  color: var(--muted-400);
}

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

.page-faq .faq-item__summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: start;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item__summary::marker {
  content: "";
}

.page-faq .faq-item__num {
  font-family: var(--font-mono);
  font-size: var(--step-24);
  line-height: 1.05;
  color: var(--muted-400);
  font-variant-numeric: tabular-nums;
  transition: color 0.18s var(--ease);
}

.page-faq .faq-item__q {
  font-size: var(--step-16);
  font-weight: 600;
  line-height: 1.6;
  color: var(--paper-100);
  transition: color 0.18s var(--ease);
}

.page-faq .faq-item__summary:hover .faq-item__q {
  color: var(--cyan-200);
}

.page-faq .faq-item__summary:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 2px;
}

.page-faq .faq-item__sign {
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 7px;
  flex: none;
}

.page-faq .faq-item__sign::before,
.page-faq .faq-item__sign::after {
  content: "";
  position: absolute;
  background: var(--cyan-400);
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}

.page-faq .faq-item__sign::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}

.page-faq .faq-item__sign::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
}

.page-faq .faq-item[open] .faq-item__num {
  color: var(--cyan-400);
}

.page-faq .faq-item[open] .faq-item__sign::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-item__body {
  margin: 0 0 20px;
  padding: 2px 0 6px 18px;
  border-left: 2px solid transparent;
  font-size: var(--step-16);
  line-height: 1.8;
  color: var(--faq-text);
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .faq-item[open] .faq-item__body {
  border-left-color: var(--cyan-400);
  background: linear-gradient(90deg, rgba(53, 242, 208, 0.08), rgba(53, 242, 208, 0) 74%);
}

.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-400);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-item__body a:hover {
  color: var(--cyan-200);
}

.page-faq .faq-num {
  font-family: var(--font-mono);
  color: var(--amber-500);
  font-variant-numeric: tabular-nums;
}

/* ---------- 组内配图 ---------- */
.page-faq .faq-figure {
  margin: 20px 0 4px;
  max-width: 240px;
}

.page-faq .faq-media-caption {
  display: block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: var(--step-12);
  line-height: 1.6;
  color: var(--muted-400);
}

/* ---------- 联系卡片 ---------- */
.page-faq .faq-help {
  display: grid;
  gap: 1px;
  margin-top: 22px;
  border: 1px solid var(--faq-line);
  background: var(--faq-line);
}

.page-faq .faq-help__block {
  padding: 18px;
  background: linear-gradient(170deg, var(--pitch-900), var(--pitch-800));
}

.page-faq .faq-help__label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: var(--step-12);
  letter-spacing: 0.12em;
  color: var(--cyan-400);
}

.page-faq .faq-help__value {
  margin: 0 0 8px;
  font-size: var(--step-16);
  font-weight: 600;
  line-height: 1.6;
  color: var(--paper-100);
  overflow-wrap: anywhere;
}

.page-faq .faq-help__note {
  margin: 0;
  font-size: var(--step-14);
  line-height: 1.7;
  color: var(--muted-400);
}

.page-faq .faq-help__block--action .lp-btn {
  margin-top: 14px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-help {
    grid-template-columns: 1fr 1fr;
  }

  .page-faq .faq-figure {
    max-width: 280px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: end;
    gap: var(--faq-gap);
  }

  .page-faq .faq-hero__text {
    padding-bottom: 6px;
  }

  .page-faq .faq-item__body {
    margin-left: 44px;
    padding-left: 20px;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-body__inner {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--head-h) + 28px);
    padding: 20px 16px 22px;
  }

  .page-faq .faq-group__lead {
    max-width: 52ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-rail__link,
  .page-faq .faq-item__num,
  .page-faq .faq-item__q,
  .page-faq .faq-item__body,
  .page-faq .faq-item__sign::before,
  .page-faq .faq-item__sign::after {
    transition: none;
  }
}
<<<END>>>