.page-faq {
  background: var(--ink-950);
  color: var(--paper);
}

/* ---------- 页首 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--ink-900);
  border-bottom: var(--edge) solid var(--line-strong);
}

.page-faq .faq-hero__bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .3;
  filter: saturate(.55) contrast(1.05);
}

.page-faq .faq-hero__veil {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(6, 18, 14, .38) 0%, rgba(6, 18, 14, .88) 66%, var(--ink-950) 100%),
    repeating-linear-gradient(90deg, transparent 0 79px, rgba(59, 240, 208, .07) 79px 80px),
    repeating-linear-gradient(0deg, transparent 0 23px, rgba(18, 59, 52, .5) 23px 24px);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  padding-block: clamp(26px, 5vw, 52px) clamp(40px, 6vw, 72px);
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  max-width: 17ch;
  font-family: var(--font-sans);
  font-size: clamp(30px, 5.6vw, 60px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-hero__lede {
  margin: 18px 0 0;
  max-width: 64ch;
  color: var(--paper-soft);
}

.page-faq .faq-hero__status {
  display: inline-block;
  margin: 24px 0 0;
  padding: 8px 14px;
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--cyan-400);
  background: rgba(6, 18, 14, .68);
  font-size: 13px;
  color: var(--cyan-400);
}

/* ---------- 快速索引 ---------- */
.page-faq .faq-index {
  padding-block: clamp(24px, 4vw, 40px);
  background: var(--ink-950);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-index__hint {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--gold-400);
}

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

.page-faq .faq-index__item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 100%;
  padding: 18px;
  background: var(--coal-900);
  color: var(--paper);
  text-decoration: none;
  transition: background-color .22s var(--ease);
}

.page-faq .faq-index__item:hover,
.page-faq .faq-index__item:focus-visible {
  background: var(--coal-700);
  outline: none;
}

.page-faq .faq-index__item:focus-visible {
  box-shadow: inset 0 0 0 2px var(--cyan-400);
}

.page-faq .faq-index__item:hover .faq-index__no {
  color: var(--cyan-400);
}

.page-faq .faq-index__no {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gold-400);
  transition: color .22s var(--ease);
}

.page-faq .faq-index__name {
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-faq .faq-index__count {
  font-size: 13px;
  color: var(--muted);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  padding-block: clamp(44px, 6.5vw, 76px) clamp(34px, 5vw, 58px);
  background: var(--ink-950);
  border-top: 1px solid var(--line);
}

.page-faq .faq-group--alt {
  background: var(--ink-900);
}

.page-faq .faq-group__head {
  display: grid;
  gap: 8px 20px;
  padding-bottom: 14px;
  border-bottom: var(--edge) solid var(--line-strong);
}

.page-faq .faq-group__num {
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--gold-400);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(24px, 3.6vw, 40px);
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-group__meta {
  margin: 0;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--muted);
}

.page-faq .faq-group__list {
  display: block;
}

/* ---------- 问答行 ---------- */
.page-faq .faq-q {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-q__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 24px;
  align-items: start;
  gap: 16px;
  padding: 20px 16px;
  border-left: 3px solid var(--gold-400);
  cursor: pointer;
  list-style: none;
  transition: background-color .22s var(--ease), border-color .22s var(--ease);
}

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

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

.page-faq .faq-q__head:hover {
  background: var(--coal-700);
}

.page-faq .faq-q__head:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: -2px;
}

.page-faq .faq-q__title {
  font-size: clamp(16px, 1.9vw, 19px);
  font-weight: 700;
  line-height: 1.55;
  color: var(--paper);
}

.page-faq .faq-q__mark {
  position: relative;
  justify-self: end;
  width: 20px;
  height: 20px;
  margin-top: 3px;
}

.page-faq .faq-q__mark::before,
.page-faq .faq-q__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--gold-400);
  transform: translate(-50%, -50%);
  transition: transform .24s var(--ease), background-color .24s var(--ease);
}

.page-faq .faq-q__mark::before {
  width: 14px;
  height: 2px;
}

.page-faq .faq-q__mark::after {
  width: 2px;
  height: 14px;
}

.page-faq .faq-q[open] .faq-q__head {
  border-left-color: var(--cyan-400);
  background: var(--coal-900);
}

.page-faq .faq-q[open] .faq-q__mark::before,
.page-faq .faq-q[open] .faq-q__mark::after {
  background: var(--cyan-400);
}

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

.page-faq .faq-q__body {
  padding: 2px 20px 22px 19px;
  border-left: 3px solid var(--cyan-400);
  background: var(--coal-900);
}

.page-faq .faq-q__body p {
  margin: 0;
  max-width: 70ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--paper-soft);
}

.page-faq .faq-q__body p + p {
  margin-top: 12px;
}

.page-faq .faq-q__body a {
  color: var(--cyan-400);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

.page-faq .faq-steps li {
  counter-increment: faqstep;
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  font-size: 16px;
  line-height: 1.78;
  color: var(--paper-soft);
}

.page-faq .faq-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan-400);
}

/* ---------- 反馈区 ---------- */
.page-faq .faq-feedback {
  display: grid;
  gap: clamp(24px, 3vw, 40px);
  margin-top: clamp(26px, 3.5vw, 40px);
}

.page-faq .faq-feedback__side {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-faq .faq-feedback__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 5 / 4;
  object-fit: cover;
  border: var(--edge) solid var(--line-strong);
  box-shadow: var(--hard);
  filter: saturate(.72);
}

.page-faq .faq-channel {
  display: grid;
  gap: 8px;
  padding: 16px 18px 18px;
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--cyan-400);
  background: var(--coal-900);
}

.page-faq .faq-channel__label {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--gold-400);
}

.page-faq .faq-channel__val {
  font-size: clamp(15px, 3.6vw, 21px);
  font-weight: 700;
  line-height: 1.35;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-faq .faq-channel__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 收尾 ---------- */
.page-faq .faq-tail {
  position: relative;
  overflow: hidden;
  margin-top: clamp(46px, 7vw, 78px);
  padding-block: clamp(44px, 6vw, 76px);
  background: var(--ink-950);
  border-top: var(--edge) solid var(--line-strong);
}

.page-faq .faq-tail::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(-45deg, rgba(59, 240, 208, .05) 0 1px, transparent 1px 15px);
  pointer-events: none;
}

.page-faq .faq-tail__inner {
  position: relative;
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  align-items: start;
}

.page-faq .faq-tail__num {
  display: block;
  font-size: 22px;
  font-weight: 700;
  color: var(--gold-400);
}

.page-faq .faq-tail__title {
  margin: 12px 0 0;
  font-size: clamp(24px, 3.6vw, 38px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.18;
  color: var(--paper);
}

.page-faq .faq-tail__text {
  margin: 14px 0 0;
  max-width: 46ch;
  color: var(--paper-soft);
}

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

.page-faq .faq-tail__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-index__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-q__head {
    padding: 22px 24px;
  }

  .page-faq .faq-q__body {
    padding: 2px 26px 24px 24px;
  }
}

@media (min-width: 860px) {
  .page-faq .faq-group__head {
    grid-template-columns: 72px minmax(0, 1fr) auto;
    align-items: baseline;
  }

  .page-faq .faq-group__meta {
    text-align: right;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-index__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-feedback {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    align-items: start;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__item,
  .page-faq .faq-q__head,
  .page-faq .faq-q__mark::before,
  .page-faq .faq-q__mark::after {
    transition: none;
  }
}
<<<END>>>