.page-faq {
  --faq-accent: var(--c-signal);
  --faq-index-top: 96px;
  display: block;
  padding-bottom: 80px;
}

.page-faq .faq-hero {
  position: relative;
  padding: 28px 0 8px;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -70px;
  left: -24px;
  right: -24px;
  height: 460px;
  background:
    radial-gradient(circle at 16% 0%, rgba(255, 106, 43, 0.15), transparent 56%),
    radial-gradient(circle at 84% 14%, rgba(47, 210, 197, 0.12), transparent 58%);
  pointer-events: none;
  z-index: 0;
}

.page-faq .faq-hero-inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero h1 {
  margin: 16px 0 16px;
  font-size: clamp(1.95rem, 6.2vw, 3.4rem);
  line-height: 1.14;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--c-white);
  max-width: 16em;
}

.page-faq .faq-hero .lead {
  max-width: 42em;
}

.page-faq .faq-hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.page-faq .faq-hero-tag {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 8px 16px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  background: rgba(18, 38, 63, 0.72);
  font-size: 13.5px;
  color: var(--text-dim);
}

.page-faq .faq-hero-tag b {
  font-family: var(--font-num);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--c-signal);
}

.page-faq .faq-hero-figure {
  position: relative;
  z-index: 1;
  margin: 34px 0 0;
}

.page-faq .faq-hero-figure .media {
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  overflow: hidden;
  background: linear-gradient(150deg, rgba(18, 38, 63, 0.9), rgba(5, 13, 24, 0.9));
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
  margin-top: 46px;
}

/* ---------- 左侧分类索引 ---------- */
.page-faq .faq-index {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, rgba(18, 38, 63, 0.92), rgba(10, 22, 38, 0.94));
  padding: 22px 20px 20px;
}

.page-faq .faq-index-title {
  margin: 0 0 18px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.page-faq .faq-anchors {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-faq .faq-anchors::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, rgba(47, 210, 197, 0.6), rgba(168, 182, 198, 0.1));
}

.page-faq .faq-anchors li {
  position: relative;
}

.page-faq .faq-anchors a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 7px 8px 7px 0;
  border-radius: var(--r-sm);
  text-decoration: none;
  font-size: 14.5px;
  color: var(--text-dim);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-num {
  position: relative;
  z-index: 1;
  flex: none;
  width: 29px;
  height: 29px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-family: var(--font-num);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--c-silver);
  background: var(--c-ink);
  border: 1px solid var(--line-strong);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-anchors a:hover {
  color: var(--c-white);
}

.page-faq .faq-anchors a:hover .faq-num {
  color: var(--c-signal);
  border-color: rgba(255, 106, 43, 0.6);
  background: rgba(255, 106, 43, 0.12);
}

.page-faq .faq-index-cta {
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-index-cta-text {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-dim);
}

/* ---------- 右侧问答流 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 92px;
  margin-bottom: 56px;
}

.page-faq .faq-group:last-of-type {
  margin-bottom: 40px;
}

.page-faq .faq-group-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding-top: 22px;
  border-top: 2px solid var(--line-strong);
  margin-bottom: 16px;
  transition: border-color var(--dur) var(--ease);
}

.page-faq .faq-group:target .faq-group-head {
  border-top-color: var(--c-signal);
}

.page-faq .faq-group-num {
  font-family: var(--font-num);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  padding: 4px 11px;
  border-radius: var(--r-pill);
  color: var(--faq-accent);
  border: 1px solid currentColor;
  background: rgba(255, 255, 255, 0.03);
}

.page-faq .faq-group-head h2 {
  margin: 0;
  font-size: clamp(1.3rem, 3.5vw, 1.8rem);
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--c-white);
}

.page-faq .faq-group-lede {
  flex-basis: 100%;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--text-dim);
  max-width: 42em;
}

.page-faq .faq-group--network { --faq-accent: var(--c-cyan); }
.page-faq .faq-group--cases { --faq-accent: var(--c-ok); }
.page-faq .faq-group--batches { --faq-accent: var(--c-amber); }
.page-faq .faq-group--verify { --faq-accent: var(--c-warn); }

.page-faq .faq-figure {
  margin: 4px 0 20px;
}

.page-faq .faq-figure .media {
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  overflow: hidden;
  background: linear-gradient(160deg, rgba(18, 38, 63, 0.9), rgba(5, 13, 24, 0.9));
}

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

.page-faq .faq-item {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: linear-gradient(180deg, rgba(18, 38, 63, 0.6), rgba(10, 22, 38, 0.62));
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-item:hover {
  border-color: var(--line-strong);
}

.page-faq .faq-item[open] {
  border-color: rgba(255, 106, 43, 0.42);
  background: linear-gradient(180deg, rgba(18, 38, 63, 0.95), rgba(10, 22, 38, 0.95));
}

.page-faq .faq-item summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 17px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--c-white);
}

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

.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--c-signal);
  outline-offset: -3px;
  border-radius: var(--r-md);
}

.page-faq .faq-mark {
  flex: none;
  position: relative;
  width: 22px;
  height: 22px;
  margin-top: 1px;
  border-radius: 6px;
  border: 1px solid var(--line-strong);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-mark::before,
.page-faq .faq-mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--c-silver);
  transform: translate(-50%, -50%);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-mark::before {
  width: 10px;
  height: 1.5px;
}

.page-faq .faq-mark::after {
  width: 1.5px;
  height: 10px;
}

.page-faq .faq-item[open] .faq-mark {
  border-color: var(--c-signal);
  background: rgba(255, 106, 43, 0.14);
}

.page-faq .faq-item[open] .faq-mark::before {
  background: var(--c-signal);
}

.page-faq .faq-item[open] .faq-mark::after {
  transform: translate(-50%, -50%) scaleY(0);
}

.page-faq .faq-answer {
  padding: 0 18px 20px 54px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-dim);
}

.page-faq .faq-answer p {
  margin: 0;
  max-width: 44em;
}

.page-faq .faq-answer p + p {
  margin-top: 10px;
}

.page-faq .faq-answer a {
  color: var(--c-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

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

/* ---------- 收尾 ---------- */
.page-faq .faq-outro {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 18px;
  padding: 26px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background:
    linear-gradient(120deg, rgba(18, 38, 63, 0.96), rgba(5, 13, 24, 0.96)),
    var(--c-deep);
}

.page-faq .faq-outro h2 {
  margin: 0 0 8px;
  font-size: clamp(1.2rem, 3vw, 1.55rem);
  font-weight: 800;
  color: var(--c-white);
}

.page-faq .faq-outro p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-dim);
}

@media (max-width: 559px) {
  .page-faq .faq-answer {
    padding-left: 18px;
  }
}

@media (min-width: 720px) {
  .page-faq .faq-outro {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding: 30px 34px;
  }

  .page-faq .faq-outro > div {
    max-width: 58ch;
  }

  .page-faq .faq-outro .btn {
    flex: none;
  }
}

@media (min-width: 1024px) {
  .page-faq {
    padding-bottom: 104px;
  }

  .page-faq .faq-layout {
    grid-template-columns: 268px minmax(0, 1fr);
    gap: 52px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: var(--faq-index-top);
    padding: 24px 22px 22px;
  }

  .page-faq .faq-group {
    scroll-margin-top: 40px;
  }

  .page-faq .faq-item summary {
    padding: 18px 22px;
    font-size: 16px;
  }

  .page-faq .faq-answer {
    padding: 0 22px 22px 58px;
    font-size: 15.5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-mark::before,
  .page-faq .faq-mark::after,
  .page-faq .faq-item,
  .page-faq .faq-num,
  .page-faq .faq-group-head {
    transition: none;
  }
}
<<<END>>>