.page-faq {
  --faq-index-w: 248px;
  --faq-radius: 2px;
  color: var(--text-100);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 32px 0 44px;
  background:
    linear-gradient(140deg, rgba(15, 59, 51, .95) 0%, rgba(15, 59, 51, 0) 62%),
    var(--ink-900);
  border-bottom: 1px solid var(--hairline);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -40%;
  right: -18%;
  width: 62%;
  height: 210%;
  background: linear-gradient(100deg, transparent 38%, rgba(53, 242, 208, .11) 50%, transparent 62%);
  transform: rotate(-11deg);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--neon-400), transparent 58%);
  opacity: .55;
}

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

.page-faq .faq-hero .breadcrumb {
  margin-bottom: 24px;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 32px;
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 6.2vw, 50px);
  line-height: 1.24;
  letter-spacing: -.01em;
  max-width: 20ch;
}

.page-faq .faq-hero__intro {
  margin: 18px 0 0;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-400);
}

.page-faq .faq-hero__panel {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 14px;
  padding: 20px;
  border: 1px solid var(--hairline);
  border-left: 2px solid var(--cyan-600);
  background: rgba(18, 26, 24, .74);
}

.page-faq .faq-hero__stat {
  display: grid;
  gap: 5px;
  min-width: 0;
}

.page-faq .faq-hero__stat-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 21px;
  line-height: 1.1;
  color: var(--text-100);
  letter-spacing: -.01em;
}

.page-faq .faq-hero__stat-num.is-ember {
  color: var(--ember-500);
}

.page-faq .faq-hero__stat-label {
  font-size: 12px;
  line-height: 1.5;
  color: var(--text-400);
}

/* ---------- 手册双栏 ---------- */
.page-faq .faq-shell {
  display: grid;
  gap: 32px;
  padding: 40px 0 0;
}

/* 索引 */
.page-faq .faq-index__title {
  margin: 0 0 12px;
  color: var(--text-400);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-faq .faq-index__list li {
  flex: 0 0 auto;
}

.page-faq .faq-index__link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 9px 13px;
  border: 1px solid var(--hairline);
  border-radius: var(--faq-radius);
  color: var(--text-400);
  font-size: 14px;
  white-space: nowrap;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--text-100);
  border-color: rgba(53, 242, 208, .5);
  background: rgba(53, 242, 208, .06);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--cyan-600);
}

.page-faq .faq-index__link:hover .faq-index__num,
.page-faq .faq-index__link:focus-visible .faq-index__num {
  color: var(--neon-400);
}

/* ---------- 图版 ---------- */
.page-faq .faq-plate {
  margin: 0 0 40px;
}

.page-faq .faq-plate__frame {
  position: relative;
  overflow: hidden;
  background: var(--ink-800);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 48px), calc(100% - 48px) 100%, 0 100%);
}

.page-faq .faq-plate__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(120% 90% at 20% 10%, transparent 45%, rgba(10, 15, 14, .72) 100%);
  pointer-events: none;
}

.page-faq .faq-plate img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.92) brightness(.9);
  transition: filter .3s var(--ease);
}

.page-faq .faq-plate:hover img {
  filter: saturate(1) brightness(.98);
}

.page-faq .faq-plate .plate__caption {
  margin-top: 12px;
  font-family: var(--font-cond);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--text-400);
}

.page-faq .faq-plate--inline {
  margin: 24px 0 28px;
}

/* ---------- 问题条目 ---------- */
.page-faq .faq-block {
  padding: 34px 0 6px;
  border-top: 1px solid var(--hairline);
}

.page-faq .faq-block__num {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--cyan-600);
}

.page-faq .faq-block__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(21px, 3.6vw, 31px);
  line-height: 1.38;
  color: var(--text-100);
  max-width: 24ch;
}

.page-faq .faq-block__sym {
  margin: 0 0 16px;
  padding-left: 14px;
  border-left: 2px solid var(--forest-500);
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-400);
}

.page-faq .faq-cause {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-100);
}

.page-faq .faq-tag {
  display: inline-block;
  margin-right: 10px;
  padding: 2px 8px;
  border: 1px solid var(--hairline);
  font-family: var(--font-cond);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--text-400);
  vertical-align: 2px;
}

.page-faq .faq-tag--cause {
  color: var(--amber-300);
  border-color: rgba(255, 195, 138, .34);
}

/* 步骤折叠 */
.page-faq .faq-steps > summary {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 0;
  cursor: pointer;
  list-style: none;
  border-bottom: 1px solid var(--hairline);
  font-family: var(--font-cond);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .16em;
  color: var(--neon-400);
  transition: color .2s var(--ease);
}

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

.page-faq .faq-steps > summary::after {
  content: "";
  width: 8px;
  height: 8px;
  margin-left: auto;
  border-right: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
  transform: rotate(45deg);
  transition: transform .25s var(--ease);
}

.page-faq .faq-steps[open] > summary::after {
  transform: rotate(-135deg);
}

.page-faq .faq-steps > summary:hover {
  color: var(--text-100);
}

.page-faq .faq-steps__list {
  list-style: none;
  margin: 0;
  padding: 14px 0 4px;
}

.page-faq .faq-steps__item {
  position: relative;
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 14px;
  padding: 10px 0;
}

.page-faq .faq-steps__item::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--hairline);
}

.page-faq .faq-steps__item:first-child::before {
  top: 26px;
  background: linear-gradient(180deg, var(--neon-400), var(--hairline));
}

.page-faq .faq-steps__item:last-child::before {
  bottom: auto;
  height: 26px;
}

.page-faq .faq-steps__n {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--hairline);
  background: var(--ink-800);
  color: var(--neon-400);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
}

.page-faq .faq-steps__text p {
  margin: 4px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-100);
}

/* 结果确认 */
.page-faq .faq-result {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  margin-top: 22px;
  padding: 14px 18px;
  border: 1px solid var(--hairline);
  border-left: 2px solid var(--neon-400);
  background-color: var(--ink-800);
  background-image: repeating-linear-gradient(-45deg, rgba(53, 242, 208, .07) 0 1px, transparent 1px 10px);
}

.page-faq .faq-result__label {
  flex: none;
  padding: 2px 8px;
  border: 1px solid rgba(53, 242, 208, .38);
  font-family: var(--font-cond);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--neon-400);
}

.page-faq .faq-result p {
  flex: 1 1 220px;
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-100);
}

.page-faq .faq-result a {
  color: var(--neon-400);
  border-bottom: 1px solid rgba(53, 242, 208, .35);
}

.page-faq .faq-result a:hover {
  border-bottom-color: var(--neon-400);
}

/* ---------- 页尾反馈条 ---------- */
.page-faq .faq-foot {
  margin-top: 56px;
  border-top: 1px solid var(--hairline);
  background: linear-gradient(180deg, rgba(15, 59, 51, .58), rgba(10, 15, 14, 0));
}

.page-faq .faq-foot__inner {
  display: grid;
  gap: 20px;
  padding: 34px 0 52px;
}

.page-faq .faq-foot__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 3.2vw, 28px);
  line-height: 1.4;
  color: var(--text-100);
}

.page-faq .faq-foot__text {
  margin: 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-400);
}

.page-faq .faq-foot__cta {
  justify-self: start;
}

/* ---------- 响应式 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: 42px 0 56px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: end;
    gap: 56px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: 64px;
    padding-top: 48px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 24px;
    align-self: start;
  }

  .page-faq .faq-index__list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index__list li + li {
    margin-top: 2px;
  }

  .page-faq .faq-index__link {
    flex-direction: row;
    align-items: baseline;
    gap: 10px;
    padding: 10px 0 10px 16px;
    border: 0;
    border-left: 1px solid var(--hairline);
    border-radius: 0;
    font-size: 15px;
    white-space: normal;
    background: none;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    border-left-color: var(--neon-400);
    background: linear-gradient(90deg, rgba(53, 242, 208, .08), transparent 70%);
  }

  .page-faq .faq-block {
    padding-top: 42px;
  }

  .page-faq .faq-block:first-of-type {
    padding-top: 0;
    border-top: 0;
  }

  .page-faq .faq-block + .faq-block {
    margin-top: 28px;
  }

  .page-faq .faq-foot__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 48px;
    padding: 40px 0 60px;
  }
}

@media (min-width: 1280px) {
  .page-faq {
    --faq-index-w: 280px;
  }

  .page-faq .faq-hero__panel {
    padding: 24px;
    gap: 20px 18px;
  }

  .page-faq .faq-hero__stat-num {
    font-size: 24px;
  }
}
<<<END>>>