.page-faq {
  --faq-gap: clamp(3.5rem, 8vw, 7.5rem);
  --faq-panel: rgba(8, 10, 9, .42);
  --faq-stroke: rgba(43, 245, 200, .5);
  --faq-ink: var(--ink-950);
  background: var(--ink-950);
  color: var(--fog-200);
  font-family: var(--font-body);
  line-height: 1.75;
  overflow-x: hidden;
}

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

.page-faq section[data-code] {
  position: relative;
  isolation: isolate;
}

.page-faq section[data-code]::before {
  content: attr(data-code);
  position: absolute;
  top: clamp(.75rem, 2.5vw, 1.75rem);
  right: clamp(.75rem, 3vw, 2.5rem);
  z-index: 0;
  font-family: var(--font-mono);
  font-size: clamp(3rem, 10vw, 8rem);
  font-weight: 200;
  line-height: .8;
  letter-spacing: -.04em;
  color: rgba(220, 232, 226, .06);
  pointer-events: none;
  user-select: none;
}

.page-faq .faq-eyebrow {
  display: inline-block;
  margin: 0 0 1rem;
  padding: .3rem .7rem;
  border: 1px solid var(--line);
  border-radius: var(--r-cut);
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .16em;
  color: var(--cyan-400);
  text-transform: uppercase;
}

.page-faq .faq-head {
  position: relative;
  z-index: 1;
  max-width: 62ch;
  margin-bottom: clamp(1.75rem, 4vw, 2.75rem);
}

.page-faq .faq-head--tight {
  margin-bottom: 1.25rem;
}

.page-faq .faq-head__title {
  margin: 0 0 .85rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  line-height: 1.18;
  letter-spacing: -.02em;
  color: var(--fog-200);
}

.page-faq .faq-head__note {
  margin: 0;
  font-size: .95rem;
  color: var(--sage-400);
}

/* ============ Q01 首屏 ============ */

.page-faq .faq-hero {
  position: relative;
  padding-block: clamp(1.5rem, 4vw, 3rem) var(--faq-gap);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: .32;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 82%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 82%);
}

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

.page-faq .faq-hero__frame {
  position: relative;
  margin-top: 1.5rem;
  padding: clamp(1.5rem, 4.5vw, 3.5rem);
  border: 1px solid var(--line);
  border-radius: var(--r-organic);
  background:
    radial-gradient(130% 110% at 12% 0%, rgba(43, 245, 200, .09), transparent 62%),
    radial-gradient(90% 90% at 100% 100%, rgba(242, 181, 68, .07), transparent 60%),
    var(--ink-900);
}

.page-faq .faq-hero__frame::before,
.page-faq .faq-hero__frame::after {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  border: 1px solid var(--cyan-400);
  opacity: .55;
}

.page-faq .faq-hero__frame::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
  border-top-left-radius: 26px;
}

.page-faq .faq-hero__frame::after {
  right: -1px;
  bottom: -1px;
  border-top: 0;
  border-left: 0;
  border-bottom-right-radius: 10px;
}

.page-faq .faq-hero__title {
  max-width: 20ch;
  margin: 0 0 1.1rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.1rem, 6.4vw, 4.2rem);
  line-height: 1.06;
  letter-spacing: -.025em;
  color: var(--fog-200);
}

.page-faq .faq-hero__lead {
  max-width: 58ch;
  margin: 0;
  font-size: clamp(.98rem, 1.5vw, 1.08rem);
  color: var(--fog-200);
  opacity: .88;
}

.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(1.75rem, 4vw, 2.5rem) 0 0;
  padding: 0;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-cut);
  background: var(--line-soft);
  overflow: hidden;
}

.page-faq .faq-stat {
  padding: .9rem 1rem;
  background: rgba(5, 17, 14, .88);
}

.page-faq .faq-stat dt {
  margin-bottom: .25rem;
  font-size: .68rem;
  letter-spacing: .16em;
  color: var(--sage-400);
}

.page-faq .faq-stat dd {
  margin: 0;
  font-size: 1.02rem;
  color: var(--fog-200);
}

.page-faq .faq-stat .mono {
  color: var(--cyan-400);
}

/* ============ Q02 四步路径 ============ */

.page-faq .faq-steps {
  position: relative;
  padding-block: 0 var(--faq-gap);
}

.page-faq .faq-steps__list {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: faqstep;
}

.page-faq .faq-step {
  position: relative;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.page-faq .faq-step::after {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 38px;
  height: 1px;
  background: var(--gold-500);
}

.page-faq .faq-step__num {
  display: block;
  margin-bottom: .55rem;
  font-family: var(--font-mono);
  font-size: clamp(2.6rem, 6vw, 3.8rem);
  font-weight: 200;
  line-height: 1;
  letter-spacing: -.04em;
  color: rgba(43, 245, 200, .18);
  -webkit-text-stroke: 1px var(--faq-stroke);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-step__title {
  margin: 0 0 .45rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -.01em;
  color: var(--fog-200);
}

.page-faq .faq-step__text {
  margin: 0;
  font-size: .95rem;
  color: var(--fog-200);
  opacity: .82;
}

.page-faq .faq-step__note {
  margin: .75rem 0 0;
  padding-left: .7rem;
  border-left: 2px solid var(--gold-500);
  font-size: .82rem;
  line-height: 1.65;
  color: var(--sage-400);
}

/* ============ 图片容器 ============ */

.page-faq .faq-figure {
  position: relative;
  z-index: 1;
  margin: clamp(2rem, 5vw, 3.25rem) 0 0;
}

.page-faq .faq-figure--wide {
  max-width: 780px;
}

.page-faq .faq-figure__media {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-organic);
  background: var(--ink-900);
}

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

.page-faq .faq-figure__caption {
  margin-top: .7rem;
  font-size: .8rem;
  color: var(--sage-400);
}

/* ============ Q03 导览 ============ */

.page-faq .faq-guide {
  padding-block: var(--faq-gap);
  background:
    radial-gradient(120% 90% at 0% 0%, rgba(43, 245, 200, .07), transparent 58%),
    var(--indigo-800);
}

.page-faq .faq-guide__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 5vw, 3.5rem);
}

.page-faq .faq-index {
  padding: 1.25rem;
  border: 1px solid rgba(220, 232, 226, .16);
  border-radius: var(--r-cut);
  background: rgba(8, 10, 9, .34);
}

.page-faq .faq-index__label {
  margin: 0 0 1rem;
  padding-bottom: .7rem;
  border-bottom: 1px solid rgba(220, 232, 226, .16);
  font-size: .7rem;
  letter-spacing: .18em;
  color: var(--gold-500);
  text-transform: uppercase;
}

.page-faq .faq-index__list {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: faqch;
}

.page-faq .faq-index__list li {
  counter-increment: faqch;
}

.page-faq .faq-index__link {
  display: flex;
  gap: .7rem;
  align-items: baseline;
  padding: .55rem 0;
  color: var(--fog-200);
  text-decoration: none;
  font-size: .92rem;
  border-bottom: 1px solid rgba(220, 232, 226, .08);
  transition: color .2s var(--ease), padding-left .2s var(--ease);
}

.page-faq .faq-index__link::before {
  content: counter(faqch, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--gold-500);
  letter-spacing: .04em;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--cyan-400);
  padding-left: .3rem;
}

.page-faq .faq-index__foot {
  margin: 1rem 0 0;
  font-size: .76rem;
  color: var(--sage-400);
}

.page-faq .faq-guide__lead {
  margin: 0 0 clamp(1.5rem, 3vw, 2.25rem);
  max-width: 60ch;
  font-size: clamp(.98rem, 1.5vw, 1.05rem);
  color: var(--fog-200);
  opacity: .88;
}

.page-faq .faq-guide__points {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: rgba(220, 232, 226, .14);
  border: 1px solid rgba(220, 232, 226, .14);
  border-radius: var(--r-cut);
  overflow: hidden;
}

.page-faq .faq-point {
  padding: 1.1rem 1.15rem;
  background: rgba(8, 10, 9, .42);
}

.page-faq .faq-point__title {
  margin: 0 0 .4rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1rem;
  color: var(--cyan-200);
}

.page-faq .faq-point__text {
  margin: 0;
  font-size: .88rem;
  color: var(--fog-200);
  opacity: .8;
}

/* ============ 问答区通用 ============ */

.page-faq .faq-sec {
  position: relative;
  padding-block: var(--faq-gap);
}

.page-faq .faq-sec--alt {
  background:
    radial-gradient(100% 80% at 100% 0%, rgba(74, 30, 46, .55), transparent 62%),
    var(--ink-900);
}

.page-faq .faq-list {
  position: relative;
  z-index: 1;
  max-width: 78ch;
  border-top: 1px solid var(--line);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--line-soft);
  background: transparent;
  transition: background .22s var(--ease);
}

.page-faq .faq-item[open] {
  background: var(--faq-panel);
}

.page-faq .faq-item > summary {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: 1.1rem 1rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--fog-200);
  transition: color .2s var(--ease);
}

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

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

.page-faq .faq-item > summary:hover,
.page-faq .faq-item > summary:focus-visible {
  color: var(--cyan-400);
}

.page-faq .faq-item > summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 400;
  line-height: 1;
  color: var(--cyan-400);
  transition: transform .24s var(--ease), color .2s var(--ease);
}

.page-faq .faq-item[open] > summary {
  color: var(--cyan-200);
}

.page-faq .faq-item[open] > summary::after {
  content: "−";
  color: var(--gold-500);
}

.page-faq .faq-item__body {
  max-width: 68ch;
  padding: 0 1rem 1.3rem;
  font-size: .93rem;
  color: var(--fog-200);
  opacity: .85;
}

.page-faq .faq-item__body p {
  margin: 0 0 .8rem;
}

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

.page-faq .faq-hier {
  display: block;
  width: 100%;
  max-width: 470px;
  height: auto;
  margin: 1.25rem 0 .5rem;
}

.page-faq .faq-inline-link {
  position: relative;
  z-index: 1;
  margin: clamp(1.5rem, 3vw, 2.25rem) 0 0;
  font-size: .9rem;
}

.page-faq .faq-inline-link .link-more {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
  transition: border-color .2s var(--ease);
}

.page-faq .faq-inline-link .link-more:hover {
  border-color: var(--cyan-400);
}

/* ============ Q07 联系 ============ */

.page-faq .faq-contact {
  padding-block: var(--faq-gap);
  background:
    radial-gradient(110% 90% at 80% 0%, rgba(242, 181, 68, .09), transparent 60%),
    var(--ink-950);
}

.page-faq .faq-contact__panel {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 4vw, 3rem);
  padding: clamp(1.5rem, 4vw, 3rem);
  border: 1px solid var(--line);
  border-radius: var(--r-organic);
  background: var(--ink-900);
}

.page-faq .faq-contact__title {
  margin: 0 0 .85rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.6rem, 3.2vw, 2.3rem);
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--fog-200);
}

.page-faq .faq-contact__text {
  max-width: 52ch;
  margin: 0 0 1.5rem;
  font-size: .95rem;
  color: var(--fog-200);
  opacity: .85;
}

.page-faq .faq-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
}

.page-faq .faq-contact__list {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-cut);
  background: var(--line-soft);
  overflow: hidden;
}

.page-faq .faq-contact__row {
  padding: .85rem 1rem;
  background: rgba(5, 17, 14, .9);
}

.page-faq .faq-contact__row dt {
  margin-bottom: .2rem;
  font-size: .68rem;
  letter-spacing: .16em;
  color: var(--sage-400);
}

.page-faq .faq-contact__row dd {
  margin: 0;
  font-size: .95rem;
  color: var(--fog-200);
  word-break: break-word;
}

.page-faq .faq-contact__row dd.mono {
  color: var(--cyan-200);
}

.page-faq .faq-contact__foot {
  position: relative;
  z-index: 1;
  margin: 1.5rem 0 0;
  font-size: .82rem;
  color: var(--sage-400);
}

.page-faq .faq-contact__foot a {
  color: var(--fog-200);
  text-decoration: none;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-contact__foot a:hover {
  color: var(--cyan-400);
}

/* ============ 响应式 ============ */

@media (min-width: 640px) {
  .page-faq .faq-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-guide__points {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-contact__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-faq .faq-steps__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2rem 1.75rem;
  }

  .page-faq .faq-item > summary {
    padding: 1.2rem 1.25rem;
    font-size: 1.05rem;
  }

  .page-faq .faq-item__body {
    padding: 0 1.25rem 1.5rem;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-guide__grid {
    grid-template-columns: minmax(0, 270px) minmax(0, 1fr);
    gap: clamp(2.5rem, 5vw, 4rem);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 1.5rem;
  }

  .page-faq .faq-contact__panel {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: start;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-steps__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.5rem;
  }

  .page-faq .faq-step__note {
    opacity: 0;
    transform: translateY(-4px);
    transition: opacity .24s var(--ease), transform .24s var(--ease);
  }

  .page-faq .faq-step:hover .faq-step__note,
  .page-faq .faq-step:focus-within .faq-step__note {
    opacity: 1;
    transform: none;
  }
}

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