.page-faq {
  --faq-gap: clamp(14px, 2.2vw, 26px);
  --faq-index-w: 252px;
  --faq-ink-soft: #3d485f;
  background: var(--ink-950);
  color: var(--white);
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + 34px) 0 clamp(30px, 4vw, 48px);
  background:
    radial-gradient(110% 92% at 10% 0%, rgba(43, 227, 198, .17), transparent 56%),
    radial-gradient(86% 78% at 94% 6%, rgba(36, 64, 124, .62), transparent 64%),
    linear-gradient(180deg, var(--ink-950) 0%, #0b1533 100%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(168, 180, 212, .22) 1px, transparent 1.3px);
  background-size: 26px 26px;
  opacity: .38;
  pointer-events: none;
  z-index: 0;
}

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

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
  margin-top: clamp(22px, 3vw, 34px);
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(33px, 6.2vw, 60px);
  font-weight: 700;
  line-height: .98;
  letter-spacing: -.01em;
  margin: 16px 0 0;
  color: var(--white);
  text-wrap: balance;
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 48ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-quick {
  background: rgba(17, 28, 61, .82);
  clip-path: var(--cut);
  padding: 22px 24px 20px;
  box-shadow: var(--shadow-float);
}

.page-faq .faq-quick__title {
  margin: 0 0 16px;
  font-family: var(--font-label);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .16em;
  color: var(--cyan);
}

.page-faq .faq-quick__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-quick__row {
  display: grid;
  grid-template-columns: minmax(84px, auto) minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--line-soft);
}

.page-faq .faq-quick__row:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-faq .faq-quick__num {
  font-family: var(--font-data);
  font-size: 17px;
  letter-spacing: .02em;
  color: var(--cyan);
  white-space: nowrap;
}

.page-faq .faq-quick__desc {
  font-size: 13.5px;
  line-height: 1.62;
  color: var(--muted);
}

/* ============ 筛选条 ============ */
.page-faq .faq-tools {
  background: rgba(10, 18, 48, .94);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  padding: 14px 0;
}

.page-faq .filter-btn.is-active,
.page-faq .filter-btn[aria-pressed="true"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink-950);
  font-weight: 600;
}

.page-faq .filter-empty[hidden] {
  display: none;
}

.page-faq .filter-empty {
  margin: 12px 0 0;
  font-size: 14px;
  color: var(--muted);
}

/* ============ 主体布局 ============ */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(22px, 3vw, 40px);
  padding-top: clamp(28px, 4vw, 52px);
  padding-bottom: clamp(56px, 7vw, 96px);
}

@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    align-items: start;
  }
}

/* ============ 左栏索引 ============ */
.page-faq .faq-index {
  display: none;
}

@media (min-width: 980px) {
  .page-faq .faq-index {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 26px);
    align-self: start;
  }
}

.page-faq .faq-index__title {
  margin: 0 0 14px;
  font-family: var(--font-label);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .16em;
  color: var(--muted);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-index__link {
  position: relative;
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 10px 12px 10px 16px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--muted);
  text-decoration: none;
  transition: color .24s var(--ease), background-color .24s var(--ease);
}

.page-faq .faq-index__link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 3px;
  background: var(--cyan);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform .28s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--white);
  background: rgba(43, 227, 198, .07);
}

.page-faq .faq-index__link:hover::before,
.page-faq .faq-index__link:focus-visible::before {
  transform: scaleY(1);
}

.page-faq:has(#timing:target) .faq-index__link[href="#timing"],
.page-faq:has(#finding:target) .faq-index__link[href="#finding"],
.page-faq:has(#desktop:target) .faq-index__link[href="#desktop"],
.page-faq:has(#columns:target) .faq-index__link[href="#columns"],
.page-faq:has(#contact:target) .faq-index__link[href="#contact"] {
  color: var(--white);
  background: rgba(43, 227, 198, .09);
}

.page-faq:has(#timing:target) .faq-index__link[href="#timing"]::before,
.page-faq:has(#finding:target) .faq-index__link[href="#finding"]::before,
.page-faq:has(#desktop:target) .faq-index__link[href="#desktop"]::before,
.page-faq:has(#columns:target) .faq-index__link[href="#columns"]::before,
.page-faq:has(#contact:target) .faq-index__link[href="#contact"]::before {
  transform: scaleY(1);
}

.page-faq .faq-index__no {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-faq .faq-index__note {
  margin: 0;
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  line-height: 1.72;
  color: var(--muted);
}

.page-faq .faq-index__note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cyan);
}

.page-faq .faq-index__note a:hover {
  color: var(--white);
  border-bottom-color: var(--white);
}

/* ============ 分组 ============ */
.page-faq .faq-groups {
  min-width: 0;
}

.page-faq .faq-group {
  position: relative;
  background: linear-gradient(178deg, var(--ink-900) 0%, #0c1533 100%);
  clip-path: var(--cut);
  padding: clamp(22px, 3vw, 34px);
  margin-bottom: var(--faq-gap);
  scroll-margin-top: calc(var(--header-h) + 28px);
}

.page-faq [data-filter-item][hidden] {
  display: none;
}

.page-faq .faq-group::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan) 0%, rgba(43, 227, 198, .12) 46%, transparent 78%);
  pointer-events: none;
}

.page-faq .faq-group__head {
  margin-bottom: clamp(18px, 2.4vw, 26px);
}

.page-faq .faq-group__kicker {
  display: inline-block;
  margin-bottom: 10px;
  padding: 4px 10px;
  font-family: var(--font-label);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .16em;
  color: var(--cyan);
  background: rgba(43, 227, 198, .1);
  clip-path: var(--cut-sm);
}

.page-faq .faq-group h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 3.2vw, 33px);
  font-weight: 700;
  line-height: 1.06;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-faq .faq-group__lead {
  margin: 10px 0 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--muted);
}

/* ============ 图片 ============ */
.page-faq .faq-figure {
  margin: 0 0 clamp(18px, 2.4vw, 24px);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: var(--cut-sm);
  background: var(--ink-700);
}

.page-faq .faq-split {
  display: grid;
  gap: clamp(18px, 2.4vw, 28px);
}

.page-faq .faq-split .faq-figure {
  margin-bottom: 0;
}

@media (min-width: 900px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }
}

/* ============ 问答列表 ============ */
.page-faq .faq-list {
  display: grid;
  gap: 12px;
  min-width: 0;
}

@media (min-width: 760px) {
  .page-faq .faq-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-split .faq-list {
    grid-template-columns: minmax(0, 1fr);
  }
}

.page-faq .faq-item {
  background: var(--paper);
  color: var(--text-ink);
  clip-path: var(--cut-sm);
  scroll-margin-top: calc(var(--header-h) + 30px);
  transition: box-shadow .3s var(--ease);
}

.page-faq .faq-item[open] {
  box-shadow: inset 4px 0 0 var(--cyan);
}

.page-faq .faq-item > summary {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  justify-content: space-between;
  padding: 16px 18px;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--text-ink);
  transition: background-color .24s var(--ease), color .24s var(--ease);
}

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

.page-faq .faq-item > summary::marker {
  content: "";
}

.page-faq .faq-item > summary:hover,
.page-faq .faq-item > summary:focus-visible {
  background: rgba(43, 227, 198, .12);
}

.page-faq .faq-item[open] > summary {
  color: var(--ink-700);
}

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

.page-faq .faq-item__mark {
  position: relative;
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  margin-top: 4px;
}

.page-faq .faq-item__mark::before {
  content: "";
  position: absolute;
  left: 1px;
  top: 2px;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--ink-700);
  border-bottom: 2px solid var(--ink-700);
  transform: rotate(45deg);
  transition: transform .28s var(--ease);
}

.page-faq .faq-item[open] .faq-item__mark::before {
  transform: rotate(-135deg);
  top: 5px;
}

.page-faq .faq-item__answer {
  padding: 14px 18px 18px;
  border-top: 1px solid rgba(19, 28, 51, .12);
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--faq-ink-soft);
}

.page-faq .faq-item__answer p {
  margin: 0;
}

.page-faq .faq-item__answer a {
  color: var(--ink-700);
  text-decoration: none;
  border-bottom: 1px solid rgba(36, 64, 124, .4);
}

.page-faq .faq-item__answer a:hover {
  color: var(--text-ink);
  border-bottom-color: var(--cyan);
}

.page-faq .faq-time {
  display: inline-block;
  padding: 1px 7px;
  font-family: var(--font-data);
  font-size: .93em;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--ink-700);
  background: var(--paper-2);
  white-space: nowrap;
}

.page-faq .faq-mono {
  font-family: var(--font-data);
  font-size: .93em;
  letter-spacing: .02em;
  color: var(--ink-700);
  word-break: break-word;
}

/* ============ 窄屏收尾 ============ */
@media (max-width: 480px) {
  .page-faq .faq-quick {
    padding: 18px 16px 16px;
  }

  .page-faq .faq-quick__row {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .page-faq .faq-group {
    padding: 18px 16px;
  }

  .page-faq .faq-item > summary {
    padding: 14px 14px;
    font-size: 15px;
  }

  .page-faq .faq-item__answer {
    padding: 12px 14px 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__mark::before,
  .page-faq .faq-index__link::before,
  .page-faq .faq-item,
  .page-faq .faq-item > summary {
    transition: none;
  }
}
<<<END>>>