.page-faq {
  --faq-rail: clamp(190px, 20vw, 250px);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
}

.page-faq a:focus-visible,
.page-faq button:focus-visible,
.page-faq input:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--pulse);
  outline-offset: 3px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background: var(--ink);
}

.page-faq .faq-hero__bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  max-width: none;
  height: 100%;
  object-fit: cover;
  opacity: .24;
  filter: saturate(.85);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(112deg, rgba(6, 17, 15, .97) 0%, rgba(11, 27, 43, .92) 56%, rgba(15, 61, 46, .8) 100%);
}

.page-faq .faq-hero__inner {
  position: relative;
  padding-block: clamp(1.8rem, 5vw, 4rem);
}

.page-faq .faq-hero__inner .crumbs {
  margin-bottom: 1.5rem;
}

.page-faq .faq-hero .eyebrow {
  color: var(--pulse);
  margin: 0;
}

.page-faq .faq-hero__title {
  margin: .9rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw, 4.2rem);
  font-weight: 900;
  line-height: .96;
  letter-spacing: -.045em;
  color: var(--paper);
}

.page-faq .faq-hero__lede {
  margin: 1.1rem 0 0;
  max-width: 56ch;
  font-size: clamp(.95rem, 1.7vw, 1.05rem);
  line-height: 1.78;
  color: var(--soft);
}

.page-faq .faq-search {
  display: flex;
  align-items: center;
  gap: .7rem;
  max-width: 620px;
  margin-top: 1.7rem;
  padding: .5rem .85rem;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  background: var(--glass);
  backdrop-filter: blur(12px);
  transition: border-color .2s ease, box-shadow .2s ease;
}

.page-faq .faq-search:focus-within {
  border-color: var(--pulse);
  box-shadow: 0 0 0 3px rgba(56, 242, 200, .16);
}

.page-faq .faq-search__tag {
  flex: none;
  padding: .2rem .45rem;
  border: 1px solid rgba(56, 242, 200, .35);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .14em;
  color: var(--pulse);
}

.page-faq .faq-search__input {
  flex: 1 1 auto;
  min-width: 0;
  padding: .45rem 0;
  border: 0;
  background: transparent;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: .92rem;
  outline: none;
}

.page-faq .faq-search__input::placeholder {
  color: var(--mute);
}

.page-faq .faq-search__key {
  flex: none;
  font-family: var(--font-mono);
  font-size: .7rem;
  color: var(--mute);
  white-space: nowrap;
}

.page-faq .faq-hero__hint {
  max-width: 62ch;
  margin: .7rem 0 0;
  font-size: .8rem;
  line-height: 1.7;
  color: var(--mute);
}

.page-faq .faq-cats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(1.6rem, 4vw, 2.4rem) 0 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--line);
  background: var(--line);
}

.page-faq .faq-cats__item a {
  display: flex;
  flex-direction: column;
  gap: .3rem;
  height: 100%;
  padding: .85rem .9rem;
  background: rgba(11, 27, 43, .82);
  color: var(--paper);
  text-decoration: none;
  transition: background-color .2s ease, box-shadow .2s ease;
}

.page-faq .faq-cats__item a:hover {
  background: var(--pitch);
  box-shadow: inset 3px 0 0 var(--pulse);
}

.page-faq .faq-cats__code {
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .14em;
  color: var(--pulse);
}

.page-faq .faq-cats__label {
  font-size: .92rem;
  font-weight: 500;
  line-height: 1.4;
}

.page-faq .faq-cats__count {
  font-family: var(--font-mono);
  font-size: .68rem;
  color: var(--mute);
  letter-spacing: .06em;
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-body {
  padding-block: clamp(1.8rem, 4.5vw, 3.6rem);
}

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

.page-faq .faq-rail {
  display: none;
}

.page-faq .faq-rail__title {
  margin: 0 0 .8rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .16em;
  color: var(--mute);
}

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

.page-faq .faq-rail__link {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: .6rem;
  align-items: center;
  margin-left: -1px;
  padding: .55rem .8rem;
  border-left: 2px solid transparent;
  color: var(--soft);
  font-size: .9rem;
  text-decoration: none;
  transition: color .2s ease, border-color .2s ease, background-color .2s ease;
}

.page-faq .faq-rail__link:hover {
  color: var(--paper);
  border-left-color: var(--pulse);
  background: var(--glass);
}

.page-faq .faq-rail__code {
  font-family: var(--font-mono);
  font-size: .64rem;
  letter-spacing: .1em;
  color: var(--mute);
}

/* ---------- 章节 ---------- */
.page-faq .faq-section {
  padding-bottom: clamp(1.6rem, 4vw, 2.6rem);
  margin-bottom: clamp(1.6rem, 4vw, 2.6rem);
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 6rem;
}

.page-faq .faq-section--last {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: 0;
}

.page-faq .faq-section__head {
  display: grid;
  gap: .45rem;
  margin-bottom: 1.1rem;
}

.page-faq .faq-section__code {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .14em;
  color: var(--pulse);
}

.page-faq .faq-section__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3.2vw, 2rem);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-faq .faq-section__desc {
  margin: 0;
  max-width: 58ch;
  font-size: .95rem;
  line-height: 1.7;
  color: var(--soft);
}

/* ---------- 手风琴 ---------- */
.page-faq .qa-list {
  border-top: 1px solid var(--line);
}

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

.page-faq .qa__summary {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: .8rem;
  align-items: start;
  padding: 1rem 0;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa__idx {
  padding-top: .28rem;
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .08em;
  color: var(--mute);
  white-space: nowrap;
  transition: color .2s ease;
}

.page-faq .qa__q {
  font-size: .98rem;
  font-weight: 500;
  line-height: 1.6;
  color: var(--paper);
}

.page-faq .qa__sign {
  position: relative;
  flex: none;
  width: 1.15rem;
  height: 1.15rem;
  margin-top: .25rem;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  transition: border-color .2s ease;
}

.page-faq .qa__sign::before,
.page-faq .qa__sign::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--soft);
  transform: translate(-50%, -50%);
  transition: transform .2s ease, background-color .2s ease;
}

.page-faq .qa__sign::before {
  width: .62rem;
  height: 1px;
}

.page-faq .qa__sign::after {
  width: 1px;
  height: .62rem;
}

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

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

.page-faq .qa[open] .qa__sign::before {
  background: var(--pulse);
}

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

.page-faq .qa:hover .qa__sign {
  border-color: var(--mist);
}

.page-faq .qa__a {
  padding-bottom: 1.1rem;
}

.page-faq .qa__a p {
  margin: 0 0 .55rem;
  max-width: 64ch;
  font-size: .94rem;
  line-height: 1.78;
  color: var(--soft);
}

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

/* ---------- 三步排查 ---------- */
.page-faq .faq-flow {
  display: grid;
  gap: 1.2rem;
  margin-top: 1.5rem;
  padding-top: 1.4rem;
  border-top: 1px dashed var(--line-strong);
}

.page-faq .faq-flow__media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--night);
  overflow: hidden;
}

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

.page-faq .faq-flow__caption {
  padding: .6rem .8rem;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .06em;
  color: var(--mute);
}

.page-faq .faq-flow__steps {
  display: grid;
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: flow;
}

.page-faq .faq-flow__steps > li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: .8rem;
  align-items: start;
  counter-increment: flow;
}

.page-faq .faq-flow__steps > li::before {
  content: counter(flow, decimal-leading-zero);
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border: 1px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--ember);
}

.page-faq .faq-flow__st {
  margin: 0 0 .25rem;
  font-size: .95rem;
  font-weight: 600;
  color: var(--paper);
}

.page-faq .faq-flow__sd {
  margin: 0;
  font-size: .88rem;
  line-height: 1.7;
  color: var(--soft);
}

/* ---------- 联系面板 ---------- */
.page-faq .faq-contact {
  display: grid;
  gap: 1.3rem;
  padding: clamp(1.1rem, 3vw, 2rem);
  border: 1px solid var(--line-strong);
  background: linear-gradient(150deg, var(--pitch) 0%, var(--night) 72%);
}

.page-faq .faq-contact__label {
  margin: 0 0 .35rem;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .14em;
  color: var(--mist);
}

.page-faq .faq-contact__mail {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: clamp(.92rem, 2.8vw, 1.18rem);
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--paper);
  word-break: break-all;
}

.page-faq .faq-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-bottom: 1rem;
}

.page-faq .faq-contact__note {
  margin: 0;
  max-width: 48ch;
  font-size: .82rem;
  line-height: 1.72;
  color: var(--soft);
}

.page-faq .faq-contact__side {
  padding-top: 1.2rem;
  border-top: 1px solid var(--line);
}

.page-faq .faq-contact__phone {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: var(--paper);
}

.page-faq .faq-contact__addr {
  margin: 0 0 1rem;
  max-width: 30ch;
  font-size: .85rem;
  line-height: 1.72;
  color: var(--soft);
}

.page-faq .faq-contact__links {
  display: grid;
  gap: .45rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-contact__links a {
  display: inline-block;
  padding-bottom: 1px;
  border-bottom: 1px solid transparent;
  color: var(--mist);
  font-size: .88rem;
  line-height: 1.6;
  text-decoration: none;
  transition: border-color .2s ease, color .2s ease;
}

.page-faq .faq-contact__links a:hover {
  color: var(--paper);
  border-bottom-color: var(--pulse);
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-faq .faq-cats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .qa__a {
    padding-left: 3.1rem;
  }
}

@media (min-width: 760px) {
  .page-faq .faq-flow {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: center;
    gap: 1.8rem;
  }

  .page-faq .faq-contact {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: 2rem;
  }

  .page-faq .faq-contact__side {
    padding-top: 0;
    padding-left: 1.6rem;
    border-top: 0;
    border-left: 1px solid var(--line);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-cats {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-rail {
    display: block;
    position: sticky;
    top: 5.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-search,
  .page-faq .qa__sign,
  .page-faq .qa__sign::before,
  .page-faq .qa__sign::after,
  .page-faq .faq-cats__item a,
  .page-faq .faq-rail__link,
  .page-faq .faq-contact__links a {
    transition: none;
  }
}
<<<END>>>