.page-faq {
  --faq-panel: linear-gradient(180deg, rgba(23, 85, 63, .22), rgba(11, 15, 14, .42));
  --faq-panel-open: linear-gradient(180deg, rgba(23, 85, 63, .34), rgba(11, 15, 14, .5));
  --faq-edge: rgba(198, 255, 61, .34);
  --faq-text: #c8d6cf;
  background: var(--ink);
  color: var(--paper);
  overflow-x: clip;
}

.page-faq img {
  max-width: 100%;
  height: auto;
}

/* ---------- 首屏 ---------- */

.page-faq .kb-hero {
  position: relative;
  padding: clamp(40px, 7vw, 88px) 0 clamp(28px, 4vw, 48px);
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(102deg, rgba(23, 85, 63, .42) 0%, rgba(11, 15, 14, 0) 58%),
    var(--ink);
}

.page-faq .kb-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 3px;
  background: linear-gradient(90deg, var(--lime) 0%, var(--moss) 34%, transparent 72%);
  transform: skewY(-.5deg);
  transform-origin: left;
  opacity: .7;
  pointer-events: none;
}

.page-faq .kb-hero__frame {
  position: relative;
  padding-left: clamp(14px, 2.6vw, 30px);
  border-left: 1px solid var(--faq-edge);
}

.page-faq .kb-hero__frame::before {
  content: "";
  position: absolute;
  left: -3px;
  top: 0;
  width: 5px;
  height: 46px;
  background: var(--lime);
}

.page-faq .kb-hero .eyebrow {
  display: block;
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--mute);
}

.page-faq .kb-hero__title {
  margin: 0;
  max-width: 22ch;
  font-family: var(--font-display);
  font-size: clamp(28px, 4.6vw, 54px);
  line-height: 1.18;
  font-weight: 900;
  letter-spacing: -.01em;
  transform: scaleX(1.02);
  transform-origin: left center;
  color: var(--paper);
}

.page-faq .kb-hero__lede {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--faq-text);
}

.page-faq .kb-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(20px, 4vw, 52px);
  margin: 30px 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.page-faq .kb-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.page-faq .kb-hero__facts .num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 600;
  line-height: 1;
  color: var(--lime);
}

.page-faq .kb-hero__facts li > span:last-child {
  font-size: 13px;
  color: var(--mute);
}

/* ---------- 布局 ---------- */

.page-faq .kb-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  padding-top: clamp(28px, 4.5vw, 56px);
  padding-bottom: clamp(40px, 6vw, 80px);
}

/* ---------- 左侧索引 ---------- */

.page-faq .kb-index {
  border: 1px solid var(--line);
  background: var(--faq-panel);
  padding: 16px 12px 14px;
}

.page-faq .kb-index__title {
  margin: 0 0 12px;
  padding: 0 10px 10px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mute);
}

.page-faq .kb-index__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .kb-index__list li {
  flex: 1 1 auto;
}

.page-faq .kb-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px;
  border-left: 2px solid transparent;
  color: var(--mute);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  transition: color .24s var(--ease), border-color .24s var(--ease), background-color .24s var(--ease);
}

.page-faq .kb-index__link:hover,
.page-faq .kb-index__link:focus-visible {
  color: var(--paper);
  background: rgba(46, 122, 94, .16);
  outline: none;
}

.page-faq .kb-index__link:focus-visible {
  box-shadow: inset 0 0 0 2px var(--lime);
}

.page-faq .kb-index__link.is-active {
  color: var(--lime);
  border-left-color: var(--lime);
  background: rgba(198, 255, 61, .08);
}

.page-faq .kb-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--moss);
}

.page-faq .kb-index__link.is-active .kb-index__num {
  color: var(--lime);
}

/* ---------- 章节 ---------- */

.page-faq .kb-section {
  padding: 0 0 clamp(26px, 4vw, 46px);
  scroll-margin-top: calc(var(--hdr-h) + 24px);
}

.page-faq .kb-section + .kb-section {
  border-top: 1px solid var(--line-soft);
  padding-top: clamp(26px, 4vw, 46px);
}

.page-faq .section__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 8px;
}

.page-faq .section__num {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--slate);
  background: var(--lime);
  padding: 3px 9px;
  line-height: 1.3;
}

.page-faq .section__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 2.6vw, 32px);
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-faq .kb-section .section__lede {
  margin: 0 0 22px;
  max-width: 60ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mute);
}

/* ---------- 问答条目 ---------- */

.page-faq .qa {
  margin-bottom: 10px;
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--moss);
  background: var(--faq-panel);
  transition: border-color .24s var(--ease), background .24s var(--ease);
}

.page-faq .qa:hover {
  border-left-color: var(--lime);
}

.page-faq .qa[open] {
  border-left-color: var(--lime);
  background: var(--faq-panel-open);
}

.page-faq .qa__q {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: baseline;
  padding: 15px 16px;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--paper);
  cursor: pointer;
  list-style: none;
}

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

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

.page-faq .qa__q::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--lime);
}

.page-faq .qa[open] .qa__q::after {
  content: "–";
}

.page-faq .qa__q:focus-visible {
  outline: none;
  box-shadow: inset 0 0 0 2px var(--lime);
}

.page-faq .qa__id {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--moss);
}

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

.page-faq .qa__a {
  margin: 0;
  padding: 0 16px 18px 52px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--faq-text);
}

.page-faq .qa[open] .qa__a {
  animation: faqReveal .32s var(--ease) both;
}

@keyframes faqReveal {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 图示 ---------- */

.page-faq .kb-figure {
  margin: 0 0 22px;
}

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

.page-faq .media-frame__caption {
  margin-top: 8px;
  font-size: 12px;
  color: var(--mute);
}

.page-faq .tier-wrap {
  margin-bottom: 24px;
  padding: 18px 16px 14px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(27, 42, 51, .55), rgba(11, 15, 14, .5));
}

.page-faq .tier-scale {
  display: block;
  width: 100%;
  height: auto;
}

.page-faq .tier-scale__seg rect {
  transition: opacity .2s var(--ease);
}

.page-faq .tier-scale__seg:hover rect {
  opacity: .78;
}

.page-faq .tier-legend {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 18px;
  margin: 14px 0 0;
  padding: 12px 0 0;
  border-top: 1px solid var(--line-soft);
  list-style: none;
}

.page-faq .tier-legend__row {
  display: grid;
  grid-template-columns: 12px 1fr auto;
  align-items: center;
  gap: 10px;
  font-size: 13px;
}

.page-faq .tier-legend__swatch {
  width: 12px;
  height: 12px;
  border-radius: 2px;
}

.page-faq .tier-legend__swatch--pitch {
  background: var(--pitch);
  border: 1px solid var(--moss);
}

.page-faq .tier-legend__swatch--amber {
  background: var(--amber);
}

.page-faq .tier-legend__swatch--amber-red {
  background: var(--card-red);
  border: 1px dashed var(--amber);
}

.page-faq .tier-legend__swatch--red {
  background: var(--card-red);
  border: 1px solid var(--paper);
}

.page-faq .tier-legend__key {
  color: var(--mute);
}

.page-faq .tier-legend__val {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--paper);
}

/* ---------- 底部引导 ---------- */

.page-faq .kb-cta {
  margin-top: clamp(30px, 4vw, 52px);
  padding: clamp(22px, 3.4vw, 38px);
  border: 1px solid var(--line);
  border-top: 3px solid var(--lime);
  background:
    linear-gradient(122deg, rgba(23, 85, 63, .5) 0%, rgba(11, 15, 14, .6) 62%),
    var(--ink-soft);
}

.page-faq .kb-cta__eyebrow {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-faq .kb-cta__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.4vw, 28px);
  font-weight: 800;
  color: var(--paper);
}

.page-faq .kb-cta__text {
  margin: 0 0 20px;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--faq-text);
}

.page-faq .kb-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.page-faq .kb-cta__actions .copy-chip {
  font-family: var(--font-mono);
  font-size: 13px;
}

.page-faq .kb-cta__links {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  color: var(--mute);
}

.page-faq .kb-cta__links a {
  color: var(--lemon);
  text-decoration: none;
  border-bottom: 1px solid rgba(232, 255, 122, .35);
}

.page-faq .kb-cta__links a:hover,
.page-faq .kb-cta__links a:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

/* ---------- 响应式 ---------- */

@media (min-width: 1024px) {
  .page-faq .kb-layout {
    grid-template-columns: 258px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 62px);
  }

  .page-faq .kb-index {
    position: sticky;
    top: calc(var(--hdr-h) + 20px);
    align-self: start;
    max-height: calc(100vh - var(--hdr-h) - 40px);
    overflow-y: auto;
  }

  .page-faq .kb-index__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
  }

  .page-faq .kb-index__link {
    border-left-width: 3px;
    padding: 11px 10px;
  }
}

@media (min-width: 1240px) {
  .page-faq .kb-hero__title {
    max-width: 26ch;
  }

  .page-faq .qa__q {
    padding: 17px 20px;
    font-size: 16px;
  }

  .page-faq .qa__a {
    padding: 0 20px 20px 56px;
  }
}

@media (max-width: 640px) {
  .page-faq .kb-hero__facts {
    gap: 18px 28px;
  }

  .page-faq .kb-hero__facts li {
    flex: 1 1 40%;
  }

  .page-faq .tier-legend {
    grid-template-columns: 1fr;
  }

  .page-faq .qa__q {
    grid-template-columns: 1fr auto;
    gap: 8px;
  }

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

  .page-faq .qa__a {
    padding: 0 16px 16px;
  }

  .page-faq .section__head {
    flex-wrap: wrap;
    gap: 10px;
  }

  .page-faq .kb-cta__actions {
    flex-direction: column;
    align-items: stretch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa[open] .qa__a {
    animation: none;
  }

  .page-faq .kb-index__link,
  .page-faq .qa,
  .page-faq .tier-scale__seg rect {
    transition: none;
  }
}
<<<END>>>