.page-faq {
  --faq-index-w: 14.5rem;
  --faq-space: clamp(1.25rem, 3vw, 2rem);
  display: block;
  background: var(--ink-900);
  color: var(--mist);
  padding-bottom: clamp(2.5rem, 7vw, 5rem);
}

.page-faq .crumbs {
  margin: 0 0 clamp(1rem, 2.5vw, 1.75rem);
}

/* ---------- 顶部与首屏 ---------- */

.page-faq .faq-top,
.page-faq .faq-layout {
  width: var(--shell);
  margin-inline: auto;
}

.page-faq .faq-top {
  padding: clamp(1.5rem, 4vw, 2.75rem) 0 0;
}

.page-faq .faq-hero {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.75rem);
  align-items: end;
  border-top: 1px solid var(--line);
  padding-top: clamp(1.5rem, 4vw, 2.5rem);
  position: relative;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: clamp(3rem, 8vw, 6rem);
  height: 2px;
  background: var(--pulse);
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.9rem, 5.2vw, 3.6rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--paper);
  margin: 0.7rem 0 0;
  max-width: 18ch;
}

.page-faq .faq-hero .lede {
  margin: 1.05rem 0 0;
  max-width: 46ch;
  font-size: clamp(0.98rem, 1.6vw, 1.08rem);
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.5rem;
}

.page-faq .faq-hero__figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

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

/* ---------- 主栅格与索引 ---------- */

.page-faq .faq-layout {
  display: grid;
  gap: clamp(1.5rem, 3.5vw, 2.75rem);
  padding-top: clamp(1.75rem, 4vw, 3rem);
}

.page-faq .faq-index {
  border-top: 2px solid var(--pulse);
  padding-top: 0.85rem;
  min-width: 0;
}

.page-faq .faq-index__label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fog);
  margin: 0 0 0.7rem;
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.12rem;
}

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: 1.85rem 1fr;
  gap: 0.15rem;
  align-items: baseline;
  padding: 0.42rem 0.45rem 0.42rem 0.2rem;
  color: var(--mist);
  text-decoration: none;
  font-size: 0.85rem;
  line-height: 1.45;
  border-left: 2px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--pulse);
  background: var(--ink-800);
  border-left-color: var(--pulse);
}

.page-faq .faq-index__link[aria-current="true"] {
  color: var(--pulse);
  background: var(--ink-800);
  border-left-color: var(--pulse);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--fog);
}

.page-faq .faq-index__link[aria-current="true"] .faq-index__num,
.page-faq .faq-index__link:hover .faq-index__num {
  color: var(--pulse);
}

.page-faq .faq-index__foot {
  margin: 1rem 0 0;
  padding-top: 0.85rem;
  border-top: 1px solid var(--line);
  font-size: 0.82rem;
  line-height: 1.65;
  color: var(--fog);
}

.page-faq .faq-index__foot a {
  color: var(--pulse);
  text-underline-offset: 3px;
}

/* ---------- 分组 ---------- */

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

.page-faq .faq-group {
  padding: clamp(1.5rem, 3.5vw, 2.5rem) 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--masthead-h) + 1rem);
  min-width: 0;
}

.page-faq .faq-group:first-child {
  border-top: none;
  padding-top: 0;
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.2rem 0.85rem;
  align-items: baseline;
  margin-bottom: 0.9rem;
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: clamp(1.2rem, 2.8vw, 1.8rem);
  line-height: 1;
  letter-spacing: 0.02em;
  color: rgba(242, 246, 251, 0.18);
}

.page-faq .faq-group__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.2rem, 2.6vw, 1.6rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--paper);
  margin: 0;
}

.page-faq .faq-group__lead {
  grid-column: 2;
  margin: 0.2rem 0 0;
  max-width: 58ch;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--fog);
}

.page-faq .faq-band {
  height: 4px;
  margin: clamp(0.5rem, 1.5vw, 1rem) 0;
  background: linear-gradient(90deg, var(--ink-600) 0%, var(--pulse-dim) 42%, var(--ink-600) 100%);
}

.page-faq .qa-figure {
  margin: 0 0 1.1rem;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

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

/* ---------- 问答手风琴 ---------- */

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

.page-faq .qa:last-of-type {
  border-bottom: 1px solid var(--line);
}

.page-faq .qa__q {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.9rem 0;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(0.96rem, 1.5vw, 1.06rem);
  line-height: 1.45;
  color: var(--paper);
  transition: color 0.2s var(--ease);
}

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

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

.page-faq .qa__q:hover,
.page-faq .qa__q:focus-visible {
  color: var(--pulse);
}

.page-faq .qa__text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .qa__tag {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  padding: 0.16rem 0.38rem;
  border: 1px solid var(--line);
  background: var(--ink-800);
  color: var(--fog);
  white-space: nowrap;
}

.page-faq .qa__tag--hot {
  color: var(--volt);
  border-color: rgba(255, 122, 47, 0.4);
  background: rgba(255, 122, 47, 0.08);
}

.page-faq .qa__chev {
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  border-right: 1.5px solid var(--pulse);
  border-bottom: 1.5px solid var(--pulse);
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform 0.24s var(--ease);
}

.page-faq .qa[open] > .qa__q {
  color: var(--pulse);
}

.page-faq .qa[open] .qa__chev {
  transform: rotate(-135deg) translate(-2px, -2px);
}

.page-faq .qa__a {
  margin: 0 0 1.1rem;
  padding: 0.15rem 0 0.15rem 0.9rem;
  border-left: 2px solid var(--pulse-dim);
  max-width: 74ch;
  font-size: 0.93rem;
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .qa__a p {
  margin: 0 0 0.6rem;
}

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

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

.page-faq .qa__steps {
  counter-reset: qs;
  list-style: none;
  margin: 0.65rem 0;
  padding: 0;
  display: grid;
  gap: 0.4rem;
}

.page-faq .qa__steps li {
  counter-increment: qs;
  display: grid;
  grid-template-columns: 1.7rem 1fr;
  gap: 0.5rem;
  align-items: start;
  padding: 0.5rem 0.7rem;
  background: var(--ink-800);
  border-left: 2px solid var(--pulse);
  font-size: 0.89rem;
  line-height: 1.65;
}

.page-faq .qa__steps li::before {
  content: counter(qs, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--pulse);
  padding-top: 0.22rem;
}

/* ---------- 求助收束 ---------- */

.page-faq .faq-help {
  margin-top: clamp(1.5rem, 3.5vw, 2.5rem);
  padding: clamp(1.25rem, 3.5vw, 2rem);
  border-top: 2px solid var(--pulse);
  background: linear-gradient(135deg, var(--ink-800) 0%, var(--ink-900) 72%);
  display: grid;
  gap: clamp(1.25rem, 3vw, 2rem);
  scroll-margin-top: calc(var(--masthead-h) + 1rem);
}

.page-faq .faq-help__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.15rem, 2.4vw, 1.5rem);
  line-height: 1.2;
  color: var(--paper);
  margin: 0.45rem 0 0;
}

.page-faq .faq-help__text {
  margin: 0.65rem 0 1.1rem;
  max-width: 48ch;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-help__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
  align-content: start;
}

.page-faq .faq-help__item {
  display: grid;
  gap: 0.18rem;
  padding-left: 0.7rem;
  border-left: 1px solid var(--line);
}

.page-faq .faq-help__key {
  font-family: var(--font-mono);
  font-size: 0.63rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fog);
}

.page-faq .faq-help__val {
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-faq .faq-help__val--mono {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

/* ---------- 响应式 ---------- */

@media (min-width: 40rem) {
  .page-faq .faq-index__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 56rem) {
  .page-faq .faq-hero {
    grid-template-columns: 7fr 5fr;
  }

  .page-faq .faq-hero__figure {
    align-self: end;
  }
}

@media (min-width: 62rem) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--masthead-h) + 1.25rem);
  }

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

  .page-faq .faq-help {
    grid-template-columns: 1.35fr 1fr;
    align-items: start;
  }
}

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