.page-faq {
  --faq-sticky: calc(var(--masthead-h) + 22px);
  background: var(--ink);
  color: var(--fog);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

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

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: calc(var(--masthead-h) + 40px) var(--gutter) 46px;
  background:
    radial-gradient(120% 100% at 88% -12%, rgba(56, 225, 208, 0.16), transparent 62%),
    radial-gradient(90% 80% at 2% 112%, rgba(243, 182, 75, 0.10), transparent 64%),
    var(--ink);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 76px 76px;
  opacity: 0.22;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.8), transparent 80%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.8), transparent 80%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  max-width: var(--maxw);
  margin: 0 auto;
}

.page-faq .faq-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--slate);
}

.page-faq .faq-crumb a {
  color: var(--slate);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-crumb a:hover,
.page-faq .faq-crumb a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-faq .faq-crumb__sep {
  color: #2b4a63;
}

.page-faq .faq-crumb [aria-current="page"] {
  color: var(--pulse);
}

.page-faq .faq-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 34px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--pulse);
}

.page-faq .faq-hero__eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--pulse);
  box-shadow: 0 0 0 4px rgba(91, 255, 200, 0.14);
}

.page-faq .faq-hero h1 {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(42px, 11vw, 90px);
  line-height: 1.02;
  letter-spacing: 0.07em;
  color: var(--fog);
}

.page-faq .faq-hero__lede {
  max-width: 62ch;
  margin: 22px 0 0;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--slate);
}

.page-faq .faq-hero__lede strong {
  color: var(--fog);
  font-weight: 500;
}

.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 14px;
  margin: 36px 0 0;
  padding: 22px 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-faq .faq-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-faq .stat-num {
  font-family: var(--font-mono);
  font-size: 22px;
  letter-spacing: 0.05em;
  color: var(--amber);
}

.page-faq .stat-label {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--slate);
}

/* ---------- 色带 ---------- */

.page-faq .faq-band {
  height: 6px;
  background: linear-gradient(90deg, var(--cyan), var(--pulse) 34%, var(--amber) 74%, var(--orange));
  opacity: 0.85;
}

/* ---------- 分组导航 ---------- */

.page-faq .faq-index {
  display: grid;
  gap: 34px;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 48px var(--gutter) 8px;
}

.page-faq .faq-index__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(24px, 6vw, 34px);
  line-height: 1.25;
  letter-spacing: 0.05em;
  color: var(--fog);
}

.page-faq .faq-index__note {
  max-width: 46ch;
  margin: 0 0 22px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--slate);
}

.page-faq .faq-nav {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-faq .faq-nav li {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-nav a {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 14px 2px;
  text-decoration: none;
  color: var(--fog);
  transition: background 0.2s var(--ease), padding-left 0.2s var(--ease);
}

.page-faq .faq-nav a:hover,
.page-faq .faq-nav a:focus-visible {
  background: rgba(56, 225, 208, 0.07);
  padding-left: 8px;
}

.page-faq .faq-nav__num {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--slate);
}

.page-faq .faq-nav a:hover .faq-nav__num {
  color: var(--pulse);
}

.page-faq .faq-nav__name {
  font-size: 15px;
  letter-spacing: 0.04em;
  transition: color 0.2s var(--ease);
}

.page-faq .faq-nav a:hover .faq-nav__name {
  color: var(--cyan);
}

.page-faq .faq-nav__count {
  font-size: 11.5px;
  letter-spacing: 0.05em;
  color: var(--amber);
  border: 1px solid var(--line);
  padding: 3px 8px;
  white-space: nowrap;
}

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

.page-faq .faq-index__figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  background: var(--ink-soft);
}

.page-faq .faq-index__figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--slate);
}

/* ---------- 问答主体 ---------- */

.page-faq .faq-main {
  display: grid;
  gap: 50px;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 44px var(--gutter) 72px;
}

.page-faq .faq-group {
  padding-left: 16px;
  border-left: 1px solid var(--line);
  scroll-margin-top: var(--faq-sticky);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 6px 12px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__no {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--pulse);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(21px, 5.4vw, 28px);
  letter-spacing: 0.05em;
  color: var(--fog);
}

.page-faq .faq-group__count {
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--amber);
  white-space: nowrap;
}

.page-faq .faq-group__lede {
  grid-column: 1 / -1;
  margin: 12px 0 0;
  max-width: 68ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--slate);
}

.page-faq .faq-group__fig {
  margin: 20px 0 6px;
}

.page-faq .faq-group__fig img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  background: var(--ink-soft);
}

.page-faq .faq-group__fig figcaption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.08em;
  color: var(--slate);
}

/* ---------- 折叠问答卡 ---------- */

.page-faq .faq-list {
  border-top: 1px solid var(--line);
  margin-top: 20px;
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-item summary {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) 18px;
  gap: 4px 10px;
  align-items: start;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
  outline: none;
}

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

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

.page-faq .faq-item summary:focus-visible {
  outline: 1px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .faq-item__mark {
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--cyan);
  padding-top: 4px;
}

.page-faq .faq-item__q {
  font-size: 15.5px;
  line-height: 1.65;
  letter-spacing: 0.02em;
  color: var(--fog);
  transition: color 0.2s var(--ease);
  overflow-wrap: break-word;
}

.page-faq .faq-item summary:hover .faq-item__q {
  color: var(--pulse);
}

.page-faq .faq-item__sign {
  position: relative;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  border: 1px solid var(--line);
  background: rgba(56, 225, 208, 0.04);
}

.page-faq .faq-item__sign::before,
.page-faq .faq-item__sign::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--cyan);
  transform: translate(-50%, -50%);
}

.page-faq .faq-item__sign::before {
  width: 8px;
  height: 1px;
}

.page-faq .faq-item__sign::after {
  width: 1px;
  height: 8px;
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}

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

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

.page-faq .faq-item__a {
  max-width: 66ch;
  padding: 0 0 20px 40px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--slate);
}

.page-faq .faq-item__a p {
  margin: 0 0 10px;
}

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

.page-faq .faq-steps {
  display: grid;
  gap: 8px;
  margin: 10px 0 12px;
  padding: 0;
  list-style: none;
  counter-reset: faqstep;
}

.page-faq .faq-steps li {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  counter-increment: faqstep;
  color: var(--fog);
}

.page-faq .faq-steps li::before {
  content: counter(faqstep);
  display: grid;
  place-items: center;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--ink);
  background: var(--cyan);
}

.page-faq .faq-item--sub {
  margin: 12px 0 4px;
  border: 1px solid var(--line);
  background: rgba(13, 43, 49, 0.5);
}

.page-faq .faq-item--sub summary {
  padding: 12px 12px;
}

.page-faq .faq-item--sub .faq-item__a {
  padding: 0 12px 14px 12px;
}

.page-faq .faq-tagtable {
  display: grid;
  gap: 7px;
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-tagtable li {
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  font-size: 13.5px;
  line-height: 1.7;
}

.page-faq .faq-tagtable b {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.05em;
  color: var(--amber);
}

/* ---------- 求助区 ---------- */

.page-faq .faq-help {
  display: grid;
  gap: 30px;
  max-width: var(--maxw);
  margin: 0 auto 80px;
  padding: 36px var(--gutter);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(140deg, rgba(29, 23, 56, 0.92), rgba(13, 43, 49, 0.92) 72%),
    var(--ink-soft);
}

.page-faq .faq-help h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(24px, 6vw, 34px);
  line-height: 1.25;
  letter-spacing: 0.05em;
  color: var(--fog);
}

.page-faq .faq-help__intro p {
  max-width: 62ch;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--slate);
}

.page-faq .faq-more {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  margin-top: 22px;
}

.page-faq .faq-more a {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 225, 208, 0.35);
  padding-bottom: 2px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-more a:hover,
.page-faq .faq-more a:focus-visible {
  color: var(--pulse);
  border-bottom-color: var(--pulse);
}

.page-faq .faq-help__ways {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-faq .faq-help__ways li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-help__key {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--amber);
}

.page-faq .faq-help__val {
  font-size: 14px;
  line-height: 1.7;
  color: var(--fog);
  overflow-wrap: break-word;
}

/* ---------- 响应式 ---------- */

@media (min-width: 560px) {
  .page-faq .faq-hero {
    padding-top: calc(var(--masthead-h) + 56px);
  }

  .page-faq .faq-item summary {
    grid-template-columns: 34px minmax(0, 1fr) 18px;
    gap: 4px 14px;
  }

  .page-faq .faq-item__a {
    padding-left: 48px;
  }

  .page-faq .faq-help__ways li {
    grid-template-columns: 132px minmax(0, 1fr);
    align-items: baseline;
    gap: 14px;
  }
}

@media (min-width: 720px) {
  .page-faq .faq-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-group {
    padding-left: 26px;
  }

  .page-faq .faq-group__head {
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: 8px 16px;
  }

  .page-faq .faq-item__q {
    font-size: 16.5px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-index {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 56px;
    align-items: start;
    padding-top: 64px;
  }

  .page-faq .faq-main {
    gap: 64px;
    padding-top: 56px;
  }

  .page-faq .faq-help {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: 56px;
    padding-top: 46px;
    padding-bottom: 46px;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-group {
    padding-left: 34px;
  }

  .page-faq .faq-item summary {
    padding: 18px 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-nav a,
  .page-faq .faq-nav__name,
  .page-faq .faq-item__q,
  .page-faq .faq-item__sign::after,
  .page-faq .faq-more a,
  .page-faq .faq-crumb a {
    transition: none;
  }
}
<<<END>>>