.page-faq {
  --faq-glass: rgba(16, 27, 46, 0.62);
  --faq-glass-open: rgba(11, 18, 32, 0.96);
  --faq-hair: rgba(30, 42, 66, 0.9);
  --faq-hair-soft: rgba(30, 42, 66, 0.6);
  --faq-a1: #B9F24A;
  --faq-a2: #35E0C6;
  --faq-a3: #FF7A2F;
  --faq-a4: #6C7CFF;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-top: calc(var(--header-h) + clamp(28px, 5vw, 64px));
  padding-bottom: clamp(36px, 6vw, 76px);
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(53, 224, 198, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(53, 224, 198, 0.055) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(120% 90% at 20% 0%, #000 8%, transparent 72%);
  mask-image: radial-gradient(120% 90% at 20% 0%, #000 8%, transparent 72%);
}

.page-faq .faq-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 56px);
  align-items: center;
}

.page-faq .faq-hero__copy h1 {
  margin: 14px 0 18px;
  font-family: var(--font-display);
  font-size: clamp(30px, 7vw, 54px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--text);
  text-wrap: balance;
}

.page-faq .faq-hero__copy .lead {
  max-width: 60ch;
  color: var(--muted);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}

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

/* ---------- 主体两栏 ---------- */

.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 48px);
  padding-block: clamp(40px, 7vw, 88px);
}

/* ---------- 主题索引 ---------- */

.page-faq .faq-index__label {
  margin: 0 0 12px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .faq-index__list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: var(--radius-s);
  border-left: 2px solid transparent;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.18s var(--ease), background 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--text);
  background: var(--faq-glass);
  border-left-color: var(--faq-a2);
  outline: none;
}

.page-faq .faq-index__num {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--faq-a1);
}

/* ---------- 分组 ---------- */

.page-faq .faq-groups {
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(40px, 6vw, 72px);
  padding-top: clamp(32px, 5vw, 56px);
  border-top: 1px solid var(--faq-hair);
}

.page-faq .faq-group:nth-child(1) { --group-accent: var(--faq-a1); }
.page-faq .faq-group:nth-child(2) { --group-accent: var(--faq-a2); }
.page-faq .faq-group:nth-child(3) { --group-accent: var(--faq-a3); }
.page-faq .faq-group:nth-child(4) { --group-accent: var(--faq-a4); }
.page-faq .faq-group:nth-child(5) { --group-accent: var(--faq-a1); }
.page-faq .faq-group:nth-child(6) { --group-accent: var(--faq-a2); }

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 16px;
  margin-bottom: clamp(18px, 3vw, 28px);
}

.page-faq .faq-group__head .index-num {
  grid-row: 1 / span 2;
  grid-column: 1;
  padding-top: 3px;
  font-family: var(--font-data);
  font-size: clamp(24px, 4.4vw, 34px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--group-accent, var(--faq-a1));
}

.page-faq .faq-group__title {
  grid-column: 2;
  grid-row: 1;
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(21px, 3.4vw, 30px);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .faq-group__note {
  grid-column: 2;
  grid-row: 2;
  margin: 0;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 折叠问答 ---------- */

.page-faq .faq-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-faq .faq-item {
  border: 1px solid var(--faq-hair);
  border-radius: var(--radius-m);
  background: var(--faq-glass);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  transition: background 0.22s var(--ease), border-color 0.22s var(--ease), box-shadow 0.22s var(--ease);
}

.page-faq .faq-item:hover {
  border-color: rgba(53, 224, 198, 0.36);
}

.page-faq .faq-item[open] {
  background: var(--faq-glass-open);
  border-color: var(--faq-hair);
  box-shadow: inset 3px 0 0 var(--group-accent, var(--faq-a1));
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  padding: 17px 20px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--text);
  transition: color 0.18s var(--ease);
}

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

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

.page-faq .faq-item > summary::after {
  content: "+";
  flex: 0 0 auto;
  margin-top: 1px;
  font-family: var(--font-data);
  font-size: 19px;
  line-height: 1;
  color: var(--group-accent, var(--faq-a1));
}

.page-faq .faq-item[open] > summary::after {
  content: "\2013";
}

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--faq-a2);
  outline-offset: -2px;
  border-radius: var(--radius-m);
}

.page-faq .faq-answer {
  padding: 0 20px 20px;
  border-top: 1px solid var(--faq-hair-soft);
}

.page-faq .faq-answer p {
  margin: 14px 0 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--muted);
}

.page-faq .faq-figure {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 14px;
  border-radius: var(--radius-s);
  border: 1px solid rgba(185, 242, 74, 0.2);
  background: rgba(185, 242, 74, 0.07);
}

.page-faq .faq-figure .stat-value {
  color: var(--faq-a1);
  line-height: 1;
}

.page-faq .faq-figure .stat-unit {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* ---------- 章节内嵌图 ---------- */

.page-faq .faq-media-inline {
  margin: clamp(22px, 3.5vw, 34px) 0 0;
  max-width: 420px;
}

/* ---------- 底部通道 ---------- */

.page-faq .faq-cta {
  border-top: 1px solid var(--faq-hair);
  background:
    linear-gradient(180deg, rgba(16, 27, 46, 0.5), rgba(5, 7, 14, 0) 70%),
    var(--ink-900);
}

.page-faq .faq-cta__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  align-items: center;
  padding-block: clamp(40px, 6vw, 72px);
}

.page-faq .faq-cta__copy h2 {
  margin: 10px 0 12px;
  font-family: var(--font-display);
  font-size: clamp(22px, 3.6vw, 32px);
  font-weight: 700;
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .faq-cta__copy p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-cta__inner .btn {
  justify-self: start;
  white-space: nowrap;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-media-inline {
    max-width: 480px;
  }

  .page-faq .faq-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 40px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(40px, 6vw, 80px);
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-body {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: clamp(36px, 5vw, 76px);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

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

  .page-faq .faq-index__link {
    white-space: normal;
  }
}

@media (min-width: 1240px) {
  .page-faq .faq-body {
    grid-template-columns: 268px minmax(0, 1fr);
  }
}

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