.page-faq {
  --faq-rail-w: 240px;
  --faq-card: #FFFFFF;
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 6vw, 60px) 0 clamp(32px, 5vw, 56px);
  background:
    linear-gradient(180deg, var(--frost) 0%, var(--frost) 72%, transparent 72%),
    var(--mist);
}

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

.page-faq .faq-hero .crumb {
  margin-bottom: 20px;
}

.page-faq .faq-hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 6.2vw, 52px);
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 8px 0 0;
  max-width: 20ch;
}

.page-faq .faq-hero__lede {
  margin-top: 20px;
  max-width: 62ch;
  color: var(--graphite);
}

.page-faq .faq-hero__quick {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--mist);
  border: 1px solid var(--mist);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .faq-hero__quick li {
  background: var(--frost);
}

.page-faq .faq-hero__quick a {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 16px 18px;
  text-decoration: none;
  color: var(--brand);
  font-weight: 600;
  font-size: 15px;
  line-height: 1.5;
  transition: background 200ms var(--ease), color 200ms var(--ease);
}

.page-faq .faq-hero__quick a:hover,
.page-faq .faq-hero__quick a:focus-visible {
  background: var(--brand);
  color: var(--frost);
}

.page-faq .faq-hero__quick-no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--gold);
  flex: none;
}

.page-faq .faq-hero__quick a:hover .faq-hero__quick-no {
  color: var(--gold);
}

/* 主体 */
.page-faq .faq-body {
  display: grid;
  gap: 32px;
  padding-top: clamp(32px, 5vw, 56px);
  padding-bottom: clamp(56px, 8vw, 96px);
}

/* 左侧索引 */
.page-faq .faq-rail__head {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--line-cyan);
  margin: 0 0 14px;
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-rail__list a {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 10px;
  align-items: baseline;
  padding: 9px 0 9px 14px;
  border-left: 1px solid var(--mist);
  text-decoration: none;
  color: var(--brand);
  font-size: 14px;
  line-height: 1.55;
  transition: border-color 180ms var(--ease), color 180ms var(--ease), background 180ms var(--ease);
}

.page-faq .faq-rail__list a:hover,
.page-faq .faq-rail__list a:focus-visible {
  border-left-color: var(--line-cyan);
  border-left-width: 2px;
  padding-left: 13px;
  color: var(--ink);
  background: var(--mist);
}

.page-faq .faq-rail__no {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--gold);
}

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

/* 筛选条 */
.page-faq .faq-filter {
  position: sticky;
  top: var(--bar-h);
  z-index: 5;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 12px 0;
  background: var(--frost);
  border-bottom: 1px solid var(--mist);
}

.page-faq .faq-filter__status {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--line-cyan);
}

/* 分组 */
.page-faq .faq-group {
  margin-top: clamp(36px, 5vw, 56px);
  scroll-margin-top: calc(var(--bar-h) + 90px);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--brand);
}

.page-faq .faq-group__no {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-faq .faq-group__title {
  font-family: var(--font-display);
  font-size: clamp(19px, 3.4vw, 26px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 0;
}

/* 问答条目 */
.page-faq .qa {
  margin-top: 12px;
  background: var(--faq-card);
  border: 1px solid var(--mist);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 200ms var(--ease);
}

.page-faq .qa[open] {
  border-color: var(--line-cyan);
}

.page-faq .qa summary {
  display: grid;
  grid-template-columns: 30px 1fr auto;
  gap: 12px;
  align-items: baseline;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

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

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

.page-faq .qa[open] summary::after {
  content: "\2212";
  color: var(--signal);
}

.page-faq .qa__no {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--line-cyan);
}

.page-faq .qa__q {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--ink);
  margin: 0;
}

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

.page-faq .qa__body {
  border-top: 1px solid var(--mist);
}

.page-faq .qa__main {
  margin: 0;
  padding: 16px 18px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--graphite);
  background: var(--faq-card);
}

.page-faq .qa__note {
  margin: 0;
  padding: 14px 18px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--graphite);
  background: var(--frost);
  border-top: 1px solid var(--mist);
}

.page-faq .qa__note::before {
  content: "补充";
  display: inline-block;
  margin-right: 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--line-cyan);
  border: 1px solid var(--mist);
  padding: 1px 5px;
  border-radius: var(--radius);
  vertical-align: 2px;
}

.page-faq .qa__next {
  margin: 0;
  padding: 12px 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--brand);
  background: var(--mist);
  border-top: 1px solid var(--frost);
}

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

.page-faq .qa__next a:hover,
.page-faq .qa__next a:focus-visible {
  color: var(--line-cyan);
}

/* 图片 */
.page-faq .faq-figure {
  margin: 18px 0 4px;
  padding: 0;
}

.page-faq .faq-figure .media__cap {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--line-cyan);
}

/* 收束 */
.page-faq .faq-help {
  background: var(--ink);
  color: var(--frost);
  padding: clamp(48px, 7vw, 84px) 0;
}

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

.page-faq .faq-help .eyebrow {
  color: var(--gold);
}

.page-faq .faq-help__title {
  color: var(--frost);
  margin: 10px 0 0;
}

.page-faq .faq-help__text {
  margin: 16px 0 24px;
  max-width: 52ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-help__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: rgba(255, 255, 255, 0.12);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.page-faq .faq-help__list li {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 12px;
  align-items: baseline;
  padding: 16px 4px;
  background: var(--ink);
}

.page-faq .faq-help__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--lake);
}

.page-faq .faq-help__list a {
  color: var(--frost);
  font-size: 15px;
  line-height: 1.65;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 180ms var(--ease), color 180ms var(--ease);
}

.page-faq .faq-help__list a:hover,
.page-faq .faq-help__list a:focus-visible {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

/* 中等屏幕 */
@media (min-width: 720px) {
  .page-faq .faq-hero__quick {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-faq .faq-help__inner {
    grid-template-columns: 1fr 1fr;
    align-items: start;
    gap: 48px;
  }
}

/* 桌面双栏：左侧索引吸附，右侧答案 */
@media (min-width: 960px) {
  .page-faq .faq-hero {
    padding-top: clamp(44px, 6vw, 76px);
  }

  .page-faq .faq-hero__deco {
    display: block;
    position: absolute;
    top: 0;
    right: 0;
    width: 34%;
    height: 100%;
    padding: 0 clamp(20px, 4vw, 56px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-end;
    gap: 6px;
    background: var(--brand);
    clip-path: polygon(28% 0, 100% 0, 100% 100%, 0 100%);
    pointer-events: none;
  }

  .page-faq .faq-hero__deco-no {
    font-family: var(--font-mono);
    font-size: clamp(56px, 8vw, 96px);
    font-weight: 700;
    line-height: 1;
    color: rgba(255, 255, 255, 0.16);
  }

  .page-faq .faq-hero__deco-txt {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.24em;
    color: var(--gold);
  }

  .page-faq .faq-hero__title {
    max-width: 16ch;
  }

  .page-faq .faq-hero__lede {
    max-width: 52ch;
  }

  .page-faq .faq-hero__quick {
    max-width: 760px;
  }

  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--bar-h) + 28px);
  }

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

  .page-faq .faq-filter {
    padding: 14px 0;
  }

  .page-faq .qa summary {
    padding: 18px 22px;
  }

  .page-faq .qa__main,
  .page-faq .qa__note,
  .page-faq .qa__next {
    padding-left: 22px;
    padding-right: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-hero__quick a,
  .page-faq .faq-rail__list a,
  .page-faq .qa,
  .page-faq .faq-help__list a {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>