.page-faq {
  --faq-hair: rgba(53, 233, 200, .18);
  --faq-hair-soft: rgba(157, 182, 172, .2);
  --faq-paper-hair: rgba(27, 22, 19, .16);
  --faq-path-ink: #0d5344;
  --faq-path-bg: rgba(53, 233, 200, .18);

  display: block;
  background: var(--ink-night);
  color: var(--text-on-dark);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: 40px 0 46px;
  border-bottom: 1px solid var(--faq-hair);
  background:
    radial-gradient(88% 118% at 100% 0%, rgba(53, 233, 200, .11), transparent 60%),
    radial-gradient(72% 92% at 0% 100%, rgba(255, 90, 43, .09), transparent 62%),
    var(--ink-night);
}

.page-faq .faq-hero__pattern {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(104deg, rgba(53, 233, 200, .055) 0 1px, transparent 1px 48px);
  pointer-events: none;
}

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

.page-faq .faq-hero__head {
  margin-top: 22px;
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  max-width: 24ch;
  font-family: var(--font-body);
  font-size: clamp(28px, 5vw, 50px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -.5px;
  color: var(--mint);
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 44ch;
  font-size: 16px;
  line-height: 1.85;
  letter-spacing: .2px;
  color: var(--text-on-dark);
}

.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 26px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .6px;
  color: var(--text-muted);
}

.page-faq .faq-hero__facts-num {
  margin-right: 4px;
  font-size: 21px;
  font-weight: 600;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-index {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
  background: var(--faq-hair);
  border: 1px solid var(--faq-hair);
}

.page-faq .faq-index__item {
  background: rgba(10, 30, 25, .78);
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 11px 14px;
  font-size: 14px;
  letter-spacing: .2px;
  line-height: 1.5;
  color: var(--text-on-dark);
  text-decoration: none;
  transition: background .2s var(--ease), color .2s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background: rgba(53, 233, 200, .12);
  color: var(--mint);
  outline: none;
}

.page-faq .faq-index__no {
  flex: none;
  font-size: 12px;
  font-weight: 600;
  color: var(--flame);
}

.page-faq .faq-index__label {
  flex: 1 1 auto;
  min-width: 0;
}

/* ---------- 主体 ---------- */

.page-faq .faq-stage {
  padding: 40px 0 64px;
  background: linear-gradient(180deg, #0b211b 0%, var(--ink-night) 46%, #0b1f1a 100%);
}

.page-faq .faq-stage__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-faq .faq-rail {
  padding-left: 14px;
  border-left: 3px solid var(--cyan);
}

.page-faq .faq-rail__title {
  margin: 0 0 12px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--text-muted);
}

.page-faq .faq-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-rail__item {
  flex: 0 0 auto;
}

.page-faq .faq-rail__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 12px;
  font-size: 14px;
  letter-spacing: .3px;
  white-space: nowrap;
  color: var(--text-on-dark);
  text-decoration: none;
  border: 1px solid var(--faq-hair-soft);
  background: rgba(18, 51, 42, .55);
  transition: border-color .2s var(--ease), background .2s var(--ease), color .2s var(--ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  border-color: var(--cyan);
  background: rgba(53, 233, 200, .12);
  color: var(--mint);
  outline: none;
}

.page-faq .faq-rail__no {
  font-size: 12px;
  font-weight: 600;
  color: var(--flame);
}

.page-faq .faq-rail__note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.75;
  letter-spacing: .4px;
  color: var(--text-muted);
}

/* ---------- 问答分组 ---------- */

.page-faq .faq-groups {
  min-width: 0;
}

.page-faq .qa-group {
  margin-bottom: 48px;
}

.page-faq .qa-group:last-child {
  margin-bottom: 0;
}

.page-faq .qa-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .qa-group__no {
  flex: none;
  font-size: 24px;
  font-weight: 600;
  line-height: 1;
  color: var(--flame);
}

.page-faq .qa-group__title {
  margin: 0;
  font-size: clamp(21px, 3vw, 27px);
  font-weight: 800;
  letter-spacing: -.3px;
  line-height: 1.25;
  color: var(--mint);
}

.page-faq .qa-group__note {
  margin: 14px 0 20px;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.8;
  letter-spacing: .2px;
  color: var(--text-muted);
}

.page-faq .faq-figure {
  margin: 0 0 20px;
  padding: 10px;
  background: linear-gradient(142deg, rgba(53, 233, 200, .12), rgba(18, 51, 42, .62) 68%);
  border: 1px solid var(--faq-hair);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 22px 100%, 0 calc(100% - 22px));
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1000 / 640;
  object-fit: cover;
  filter: saturate(.92) contrast(1.04);
}

.page-faq .faq-figure__caption {
  margin-top: 9px;
  padding-left: 2px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .6px;
  line-height: 1.6;
  color: var(--text-muted);
}

.page-faq .qa-group__list {
  display: grid;
  gap: 10px;
}

/* ---------- 单条问答 ---------- */

.page-faq .qa {
  position: relative;
  background: var(--paper);
  color: var(--ink-deep);
  border: 1px solid var(--faq-paper-hair);
  border-left: 3px solid rgba(27, 22, 19, .22);
  box-shadow: 0 10px 22px -18px rgba(0, 0, 0, .85);
  transition: border-left-color .2s var(--ease), background .2s var(--ease), box-shadow .2s var(--ease);
}

.page-faq .qa::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 18px;
  height: 18px;
  background: #0b211b;
  clip-path: polygon(100% 0, 0 0, 100% 100%);
  pointer-events: none;
}

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

.page-faq .qa[open] {
  background: #fdf8ec;
  border-left-color: var(--flame);
  box-shadow: inset 0 2px 7px rgba(27, 22, 19, .1), 0 10px 22px -18px rgba(0, 0, 0, .85);
}

.page-faq .qa__q {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 34px 16px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  letter-spacing: .2px;
  color: var(--ink-deep);
}

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

.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--faq-path-ink);
  outline-offset: -3px;
}

.page-faq .qa__num {
  flex: none;
  padding-top: 3px;
  font-size: 13px;
  font-weight: 600;
  color: var(--flame);
}

.page-faq .qa__label {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .qa__mark {
  flex: none;
  position: relative;
  align-self: center;
  width: 16px;
  height: 16px;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  background: var(--ink-deep);
}

.page-faq .qa__mark::before {
  left: 0;
  right: 0;
  top: 7px;
  height: 2px;
}

.page-faq .qa__mark::after {
  top: 0;
  bottom: 0;
  left: 7px;
  width: 2px;
  transition: transform .2s var(--ease);
}

.page-faq .qa[open] .qa__mark::after {
  transform: scaleY(0);
}

.page-faq .qa__a {
  padding: 0 22px 18px 43px;
}

.page-faq .qa__a p {
  margin: 0 0 10px;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.85;
  letter-spacing: .2px;
  color: rgba(27, 22, 19, .72);
}

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

.page-faq .qa__path {
  display: inline-block;
  padding: 1px 6px;
  font-family: var(--font-mono);
  font-size: .9em;
  font-weight: 600;
  letter-spacing: 0;
  white-space: nowrap;
  color: var(--faq-path-ink);
  background: var(--faq-path-bg);
  border-bottom: 1px solid rgba(13, 83, 68, .4);
}

/* ---------- 尾部 ---------- */

.page-faq .faq-tail {
  padding: 40px 0;
  background: var(--paper);
  color: var(--ink-deep);
  border-top: 3px solid var(--flame);
}

.page-faq .faq-tail__inner {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-faq .faq-tail__title {
  margin: 0 0 10px;
  font-size: clamp(21px, 3vw, 26px);
  font-weight: 800;
  letter-spacing: -.3px;
  color: var(--ink-deep);
}

.page-faq .faq-tail__text {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.85;
  letter-spacing: .2px;
  color: rgba(27, 22, 19, .68);
}

.page-faq .faq-tail__cta {
  align-self: flex-start;
  flex: none;
}

/* ---------- 响应式 ---------- */

@media (min-width: 600px) {
  .page-faq .faq-index {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero {
    padding: 60px 0 56px;
  }

  .page-faq .faq-index {
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  }

  .page-faq .faq-stage {
    padding: 56px 0 88px;
  }

  .page-faq .faq-stage__grid {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--topbar-h) + 24px);
    align-self: start;
  }

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

  .page-faq .faq-rail__item + .faq-rail__item {
    margin-top: 4px;
  }

  .page-faq .faq-rail__link {
    width: 100%;
    box-sizing: border-box;
  }

  .page-faq .qa__q {
    padding: 17px 38px 17px 22px;
    font-size: 16.5px;
  }

  .page-faq .qa__a {
    padding: 0 30px 20px 52px;
  }

  .page-faq .faq-tail__inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
  }

  .page-faq .faq-tail__cta {
    align-self: auto;
  }
}

@media (min-width: 1240px) {
  .page-faq .qa-group--wide .qa__a p {
    max-width: 52em;
  }
}
<<<END>>>