.page-faq {
  --faq-rail-w: 264px;
  --faq-cut: 14px;
  display: block;
  background: var(--night);
  color: var(--silver);
  font-family: var(--font-body);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  object-position: 50% 42%;
  opacity: 0.34;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    linear-gradient(102deg, var(--night) 16%, rgba(8, 11, 10, 0.84) 54%, rgba(8, 11, 10, 0.4) 100%),
    repeating-linear-gradient(90deg, rgba(199, 208, 210, 0.05) 0 1px, transparent 1px 68px);
}

.page-faq .faq-hero__accent {
  position: absolute;
  z-index: 2;
  top: -72px;
  right: -48px;
  width: 260px;
  height: 190px;
  pointer-events: none;
  transform: skewX(-18deg);
  background: linear-gradient(125deg, var(--cyan-16), transparent 72%);
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 3;
  padding: 32px 0 44px;
}

.page-faq .faq-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 22px 0 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-faq .faq-hero__title {
  margin: 0;
  max-width: 22ch;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(30px, 7vw, 62px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-faq .faq-hero__lede {
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--silver);
}

.page-faq .faq-hero__jump {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.page-faq .faq-chip {
  display: inline-flex;
  align-items: center;
  padding: 9px 16px;
  border: 1px solid var(--line-2);
  color: var(--silver);
  font-size: 13.5px;
  letter-spacing: 0.02em;
  text-decoration: none;
  clip-path: polygon(0 0, calc(100% - var(--cut-sm)) 0, 100% var(--cut-sm), 100% 100%, 0 100%);
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.page-faq .faq-chip:hover,
.page-faq .faq-chip:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan-32);
  background-color: var(--cyan-08);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  padding: 40px 0 24px;
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-rail {
  border-top: 1px solid var(--line-2);
  padding-top: 16px;
}

.page-faq .faq-rail__nav {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 12px;
}

.page-faq .faq-rail__nav a {
  display: flex;
  align-items: baseline;
  gap: 9px;
  width: 100%;
  padding: 9px 12px;
  border-left: 2px solid transparent;
  color: var(--dim);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.page-faq .faq-rail__nav a .num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  opacity: 0.7;
}

.page-faq .faq-rail__nav a:hover,
.page-faq .faq-rail__nav a:focus-visible {
  color: var(--white);
  border-left-color: var(--cyan);
  background-color: var(--cyan-08);
}

.page-faq .faq-rail__nav a:hover .num,
.page-faq .faq-rail__nav a:focus-visible .num {
  opacity: 1;
}

.page-faq .faq-rail__meta {
  margin: 16px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--dim);
}

/* ---------- 右侧问题区 ---------- */
.page-faq .faq-flow {
  min-width: 0;
}

.page-faq .faq-group + .faq-group {
  margin-top: 48px;
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 2px 12px;
  align-items: baseline;
  padding-bottom: 14px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--line-2);
}

.page-faq .faq-group__no {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq .faq-group__title {
  grid-column: 2;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(21px, 4.4vw, 30px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-group__desc {
  grid-column: 1 / -1;
  margin: 10px 0 0;
  max-width: 68ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--dim);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-list {
  display: block;
}

.page-faq .qa {
  position: relative;
  margin: 0 0 10px;
  border-left: 2px solid var(--line-2);
  background: linear-gradient(100deg, rgba(22, 33, 30, 0.92) 0%, rgba(13, 43, 34, 0.55) 100%);
  transition: border-color 0.25s ease, background 0.25s ease;
}

.page-faq .qa:hover {
  border-left-color: var(--cyan-32);
}

.page-faq .qa[open] {
  border-left-color: var(--cyan);
  background: linear-gradient(100deg, rgba(16, 44, 37, 0.96) 0%, rgba(13, 43, 34, 0.66) 100%);
}

.page-faq .qa__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 9px;
  align-items: baseline;
  padding: 14px;
  cursor: pointer;
  list-style: none;
  color: var(--white);
  font-size: 15px;
  line-height: 1.6;
}

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

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

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

.page-faq .qa__no {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-faq .qa__text {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1em;
  line-height: 1.6;
  color: inherit;
}

.page-faq .qa__mark {
  position: relative;
  align-self: center;
  flex: none;
  width: 13px;
  height: 13px;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform 0.25s ease;
}

.page-faq .qa__mark::before {
  left: 0;
  top: 5.5px;
  width: 13px;
  height: 2px;
}

.page-faq .qa__mark::after {
  left: 5.5px;
  top: 0;
  width: 2px;
  height: 13px;
}

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

.page-faq .qa__a {
  padding: 0 14px 16px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--silver);
}

.page-faq .qa__a p {
  margin: 0 0 10px;
}

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

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

/* ---------- 图示 ---------- */
.page-faq .faq-figure {
  margin: 0 0 20px;
}

/* ---------- 底部支持 ---------- */
.page-faq .faq-help {
  margin-top: 56px;
}

.page-faq .faq-help__panel {
  padding: 24px 20px 26px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  background:
    linear-gradient(128deg, rgba(13, 43, 34, 0.92) 0%, rgba(8, 11, 10, 0.92) 100%),
    repeating-linear-gradient(0deg, rgba(199, 208, 210, 0.04) 0 1px, transparent 1px 40px);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}

.page-faq .faq-help__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(20px, 3.6vw, 26px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-help__desc {
  margin: 12px 0 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--silver);
}

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

.page-faq .faq-help__contacts {
  display: grid;
  gap: 12px;
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-contact {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  font-size: 14px;
  line-height: 1.6;
}

.page-faq .faq-contact__label {
  flex: none;
  min-width: 66px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--dim);
}

.page-faq .faq-contact__value {
  color: var(--white);
  word-break: break-word;
}

.page-faq .faq-contact__hint {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--dim);
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero__inner {
    padding: 44px 0 62px;
  }

  .page-faq .faq-hero__lede {
    font-size: 16.5px;
  }

  .page-faq .faq-body {
    padding: 56px 0 32px;
  }

  .page-faq .qa__q {
    gap: 14px;
    padding: 18px 20px;
    font-size: 16px;
  }

  .page-faq .qa__a {
    padding: 0 48px 20px 58px;
    font-size: 15px;
  }

  .page-faq .faq-figure {
    margin-bottom: 26px;
  }

  .page-faq .faq-help__panel {
    padding: 32px 30px 34px;
  }

  .page-faq .faq-help {
    margin-top: 64px;
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
    max-height: calc(100vh - var(--header-h) - 56px);
    overflow-y: auto;
  }

  .page-faq .faq-rail__nav {
    flex-direction: column;
    flex-wrap: nowrap;
  }

  .page-faq .faq-group + .faq-group {
    margin-top: 64px;
  }

  .page-faq .faq-hero__inner {
    padding: 56px 0 76px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__mark::before,
  .page-faq .qa__mark::after,
  .page-faq .faq-chip,
  .page-faq .faq-rail__nav a {
    transition: none;
  }
}
<<<END>>>