.page-faq {
  --faq-gap: 24px;
  --faq-radius: 2px;
  padding-block: 20px 72px;
  background:
    linear-gradient(180deg, rgba(53, 224, 255, 0.05), transparent 260px),
    var(--ink-900);
}

.page-faq .breadcrumbs {
  margin-bottom: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-bottom: 26px;
  margin-bottom: 28px;
  border-bottom: 2px solid var(--line);
}

.page-faq .faq-hero h1 {
  margin: 10px 0 16px;
  font-size: clamp(30px, 6.4vw, 62px);
  font-weight: 300;
  line-height: 1.16;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-faq .faq-hero__lead {
  max-width: 44em;
  margin: 0 0 22px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-meta__item {
  padding: 5px 10px;
  border: 1px solid var(--line);
  border-radius: var(--faq-radius);
  background: var(--ink-800);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-faq .faq-meta__item:first-child {
  border-color: var(--cyan);
  color: var(--cyan);
}

/* ---------- 布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: 28px;
}

/* ---------- 分组索引 ---------- */
.page-faq .faq-index__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 13px;
  border: 2px solid var(--line);
  border-radius: var(--faq-radius);
  background: var(--ink-800);
  font-size: 13px;
  line-height: 1.4;
  color: var(--paper);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.18s ease, color 0.18s ease, background-color 0.18s ease;
}

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

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  background: var(--ink-700);
  outline: none;
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  margin-bottom: 52px;
  scroll-margin-top: 96px;
}

.page-faq .faq-group:last-of-type {
  margin-bottom: 36px;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  margin-bottom: 20px;
  border-bottom: 2px solid var(--line);
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-size: clamp(21px, 3.2vw, 30px);
  font-weight: 500;
  line-height: 1.3;
  color: var(--paper);
}

/* ---------- 图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 20px;
  border: 2px solid var(--line);
  border-radius: var(--faq-radius);
  background: var(--ink-700);
  overflow: hidden;
}

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

.page-faq .faq-figure figcaption {
  padding: 10px 12px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-faq .faq-group__split {
  display: grid;
  gap: 20px;
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-item {
  margin-bottom: 12px;
  border: 2px solid var(--line);
  border-radius: var(--faq-radius);
  background: var(--ink-800);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.page-faq .faq-item[open] {
  border-color: var(--cyan);
  background: var(--ink-700);
  box-shadow: 6px 6px 0 var(--ink-900);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
}

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

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

.page-faq .faq-item__num {
  flex: 0 0 auto;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

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

.page-faq .faq-item__text {
  flex: 1 1 auto;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--paper);
}

.page-faq .faq-flag {
  flex: 0 0 auto;
  margin-top: 4px;
  padding: 2px 6px;
  border-radius: var(--faq-radius);
  background: var(--amber);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--ink-900);
}

.page-faq .faq-item__dot {
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  margin-top: 8px;
  border: 2px solid var(--line);
  border-radius: 50%;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.page-faq .faq-item[open] .faq-item__dot {
  border-color: var(--cyan);
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(53, 224, 255, 0.14);
}

.page-faq .faq-item__a {
  margin: 0 16px 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-item__a p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper);
}

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

.page-faq .faq-item__a a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-item__a a:hover {
  color: var(--amber);
}

.page-faq .faq-steps {
  display: grid;
  gap: 7px;
  margin: 10px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-steps li {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding-left: 10px;
  border-left: 1px solid var(--line);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-steps b {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--amber);
}

/* ---------- 底部协助 ---------- */
.page-faq .faq-help {
  display: grid;
  gap: 18px;
  padding: 22px;
  border: 2px solid var(--cyan);
  border-radius: var(--faq-radius);
  background: var(--ink-800);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-help h2 {
  margin: 8px 0 10px;
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 400;
  line-height: 1.3;
  color: var(--paper);
}

.page-faq .faq-help__text {
  max-width: 40em;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

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

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-faq {
    padding-block: 28px 88px;
  }

  .page-faq .faq-item__q {
    padding: 17px 20px;
    gap: 14px;
  }

  .page-faq .faq-item__text {
    font-size: 16px;
  }

  .page-faq .faq-item__a {
    margin: 0 20px 20px;
  }

  .page-faq .faq-help {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 28px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: 248px minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 96px;
  }

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

  .page-faq .faq-index__link {
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    margin-left: -2px;
    background: transparent;
    padding: 11px 12px;
    white-space: normal;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    border-left-color: var(--cyan);
    background: rgba(53, 224, 255, 0.05);
  }

  .page-faq .faq-group__split {
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: start;
  }

  .page-faq .faq-group__split .faq-figure {
    margin-bottom: 0;
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-hero__lead {
    font-size: 17px;
  }
}

@media (min-width: 1240px) {
  .page-faq .faq-layout {
    grid-template-columns: 272px minmax(0, 1fr);
  }

  .page-faq .faq-group__split {
    grid-template-columns: minmax(0, 1fr) 340px;
  }

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

  .page-faq .faq-item__a {
    margin: 0 22px 22px;
  }
}

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