.page-faq {
  --faq-rail: 240px;
  --faq-sticky: calc(var(--header-h-sm) + 80px);
  display: block;
  padding-bottom: clamp(48px, 7vw, 88px);
}

/* ---------- 面包屑 ---------- */
.page-faq .page-faq__crumbs {
  padding-top: clamp(14px, 2.4vw, 26px);
  padding-bottom: clamp(6px, 1.4vw, 14px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  background:
    radial-gradient(110% 100% at 88% -12%, rgba(38, 225, 255, .18), transparent 55%),
    radial-gradient(90% 90% at 4% 112%, rgba(255, 91, 34, .13), transparent 58%),
    linear-gradient(180deg, var(--ink-900) 0%, var(--ink-800) 100%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(90deg, rgba(38, 58, 102, .5) 0 1px, transparent 1px 132px);
  opacity: .55;
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan) 28%, var(--lava) 72%, transparent);
  opacity: .6;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  padding: clamp(38px, 7vw, 84px) 0 clamp(34px, 6vw, 68px);
}

.page-faq .faq-hero__eyebrow {
  margin: 0 0 clamp(14px, 2vw, 22px);
  font-size: var(--fs-12);
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-hero h1 {
  margin: 0 0 clamp(16px, 2.4vw, 26px);
  max-width: 20ch;
  font-size: clamp(32px, 5.6vw, 72px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--ice);
}

.page-faq .faq-hero__lede {
  margin: 0 0 clamp(24px, 3vw, 36px);
  max-width: 62ch;
  font-size: clamp(15px, 1.3vw, 18px);
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 锚点条 ---------- */
.page-faq .faq-anchors {
  position: sticky;
  top: var(--header-h-sm);
  z-index: 8;
  border-bottom: 1px solid var(--rule);
  background: linear-gradient(180deg, rgba(5, 11, 28, .97) 0%, rgba(5, 11, 28, .88) 100%);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.page-faq .faq-anchors__inner {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 22px);
  padding: 10px 0;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scrollbar-width: none;
}

.page-faq .faq-anchors__inner::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-anchors__label {
  flex: 0 0 auto;
  padding-right: clamp(8px, 1.5vw, 16px);
  border-right: 1px solid var(--rule);
  font-size: var(--fs-12);
  letter-spacing: .18em;
  color: var(--cyan);
}

.page-faq .faq-anchors__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-anchors__list a {
  display: inline-block;
  white-space: nowrap;
  padding: 6px 14px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  font-size: var(--fs-14);
  color: var(--mist);
  text-decoration: none;
  transition: color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-faq .faq-anchors__list a:hover,
.page-faq .faq-anchors__list a:focus-visible {
  color: var(--ice);
  border-color: var(--cyan);
  background: rgba(38, 225, 255, .09);
}

/* ---------- 规则区 ---------- */
.page-faq .faq-rules {
  padding: clamp(40px, 6vw, 78px) 0 clamp(20px, 3vw, 34px);
}

.page-faq .faq-banner {
  margin: clamp(20px, 3vw, 32px) 0 0;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-800);
}

.page-faq .faq-banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
  opacity: .92;
}

.page-faq .faq-banner .media__caption,
.page-faq .faq-figure .media__caption,
.page-faq .faq-chart .media__caption {
  margin: 0;
  padding: 12px 16px;
  border-top: 1px solid var(--rule);
  font-size: var(--fs-12);
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-rules__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
  margin-top: clamp(24px, 3.5vw, 40px);
}

.page-faq .faq-toc {
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 16px;
  background: linear-gradient(180deg, rgba(20, 35, 76, .66) 0%, rgba(11, 23, 52, .4) 100%);
}

.page-faq .faq-toc__title {
  margin: 0 0 12px;
  font-size: var(--fs-12);
  letter-spacing: .18em;
  color: var(--cyan);
}

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

.page-faq .faq-toc__list a {
  display: block;
  padding: 7px 10px;
  border-left: 2px solid transparent;
  border-radius: 4px;
  font-size: var(--fs-14);
  color: var(--mist);
  text-decoration: none;
  transition: color .18s var(--ease), background-color .18s var(--ease), border-color .18s var(--ease);
}

.page-faq .faq-toc__list a:hover,
.page-faq .faq-toc__list a:focus-visible {
  color: var(--ice);
  background: rgba(38, 225, 255, .08);
  border-left-color: var(--cyan);
}

.page-faq .faq-toc__hint {
  margin: 14px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--rule);
  font-size: var(--fs-12);
  line-height: 1.75;
  color: var(--mist);
}

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

/* ---------- 折叠规则 ---------- */
.page-faq .faq-rule {
  margin-bottom: 14px;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  overflow: hidden;
  background: linear-gradient(180deg, rgba(20, 35, 76, .6) 0%, rgba(11, 23, 52, .42) 100%);
  box-shadow: inset 0 1px 0 rgba(234, 242, 255, .045);
  scroll-margin-top: var(--faq-sticky);
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}

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

.page-faq .faq-rule[open] {
  border-color: rgba(38, 225, 255, .4);
}

.page-faq .faq-rule:target {
  border-color: var(--cyan);
  box-shadow: 0 0 0 1px rgba(38, 225, 255, .45), 0 0 44px -16px rgba(38, 225, 255, .7);
}

.page-faq .faq-rule__summary {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.6vw, 16px);
  padding: 15px clamp(14px, 2vw, 22px);
  cursor: pointer;
  list-style: none;
}

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

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

.page-faq .faq-rule__idx {
  flex: 0 0 auto;
  padding: 3px 7px;
  border: 1px solid rgba(38, 225, 255, .35);
  border-radius: 4px;
  font-size: var(--fs-12);
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-faq .faq-rule__name {
  font-size: clamp(17px, 1.6vw, 22px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ice);
}

.page-faq .faq-rule__count {
  margin-left: auto;
  font-size: var(--fs-12);
  color: var(--mist);
  white-space: nowrap;
}

.page-faq .faq-rule__mark {
  flex: 0 0 auto;
  width: 22px;
  text-align: center;
  font-size: var(--fs-20);
  line-height: 1;
  color: var(--lava);
  transition: transform .2s var(--ease);
}

.page-faq .faq-rule[open] .faq-rule__mark {
  transform: rotate(45deg);
}

.page-faq .faq-rule__body {
  padding: 0 clamp(14px, 2vw, 22px) clamp(18px, 2.4vw, 24px);
}

.page-faq .faq-rule__body > p {
  margin: 0;
  padding-top: 16px;
  border-top: 1px solid rgba(38, 58, 102, .7);
  max-width: 68ch;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-rule__list {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-faq .faq-rule__list li {
  position: relative;
  padding-left: 18px;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-rule__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 7px;
  height: 1px;
  background: var(--cyan);
}

/* ---------- 图 ---------- */
.page-faq .faq-chart,
.page-faq .faq-figure {
  margin: 18px 0 0;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(5, 11, 28, .55);
}

.page-faq .faq-chart svg {
  display: block;
  width: 100%;
  height: auto;
  padding: 14px clamp(10px, 2vw, 18px) 6px;
  box-sizing: border-box;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  opacity: .9;
}

/* ---------- 答疑 ---------- */
.page-faq .faq-qa {
  padding: clamp(36px, 5.4vw, 72px) 0 0;
  scroll-margin-top: var(--faq-sticky);
}

.page-faq .faq-qa__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: clamp(20px, 3vw, 32px);
}

.page-faq .qa-card {
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: clamp(16px, 2vw, 22px);
  background: linear-gradient(180deg, rgba(20, 35, 76, .5) 0%, rgba(11, 23, 52, .32) 100%);
  box-shadow: inset 0 1px 0 rgba(234, 242, 255, .04), 0 20px 44px -36px rgba(0, 0, 0, .95);
}

.page-faq .qa-card__q {
  margin: 0 0 10px;
  font-size: var(--fs-16);
  font-weight: 700;
  line-height: 1.6;
  color: var(--ice);
}

.page-faq .qa-card__a {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .qa-card__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(38, 225, 255, .45);
}

.page-faq .qa-card__a a:hover,
.page-faq .qa-card__a a:focus-visible {
  color: var(--ice);
  border-bottom-color: var(--lava);
}

/* ---------- 提交问题 ---------- */
.page-faq .faq-contact {
  padding: clamp(36px, 5.4vw, 72px) 0 0;
  scroll-margin-top: var(--faq-sticky);
}

.page-faq .faq-contact__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: clamp(20px, 3vw, 32px);
}

.page-faq .faq-channel {
  display: flex;
  flex-direction: column;
  gap: 8px;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: clamp(18px, 2.2vw, 24px);
  background: linear-gradient(180deg, rgba(20, 35, 76, .5) 0%, rgba(11, 23, 52, .3) 100%);
}

.page-faq .faq-channel--main {
  border-color: rgba(255, 91, 34, .45);
  background:
    radial-gradient(120% 120% at 100% 0%, rgba(255, 91, 34, .16), transparent 60%),
    linear-gradient(180deg, rgba(20, 35, 76, .62) 0%, rgba(11, 23, 52, .36) 100%);
}

.page-faq .faq-channel__label {
  margin: 0;
  font-size: var(--fs-12);
  letter-spacing: .18em;
  color: var(--lava);
}

.page-faq .faq-channel--main .faq-channel__label {
  color: var(--pulse);
}

.page-faq .faq-channel__title {
  margin: 0;
  font-size: clamp(17px, 1.6vw, 21px);
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: -0.01em;
  color: var(--ice);
  word-break: break-word;
}

.page-faq .faq-channel__desc {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-channel .btn {
  align-self: flex-start;
  margin-top: 6px;
}

.page-faq .faq-contact__foot {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--rule);
  max-width: 78ch;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-contact__foot a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(38, 225, 255, .45);
}

.page-faq .faq-contact__foot a:hover,
.page-faq .faq-contact__foot a:focus-visible {
  color: var(--ice);
  border-bottom-color: var(--lava);
}

/* ---------- 平板 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-rule__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px 26px;
  }

  .page-faq .faq-qa__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-contact__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1000px) {
  .page-faq {
    --faq-rail: 240px;
  }

  .page-faq .faq-rules__layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: var(--faq-sticky);
    max-height: calc(100vh - var(--faq-sticky) - 24px);
    overflow: auto;
  }
}

/* ---------- 窄屏收口 ---------- */
@media (max-width: 540px) {
  .page-faq .faq-rule__count {
    display: none;
  }

  .page-faq .faq-hero h1 {
    max-width: none;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-rule__mark,
  .page-faq .faq-anchors__list a,
  .page-faq .faq-toc__list a {
    transition: none;
  }

  .page-faq .faq-rule[open] .faq-rule__mark {
    transform: none;
  }
}
<<<END>>>