.page-faq {
  --faq-gap: clamp(28px, 5vw, 64px);
  --faq-card: rgba(18, 48, 74, 0.5);
  position: relative;
  background: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-body);
  padding: clamp(20px, 4vw, 40px) 0 clamp(64px, 9vw, 128px);
  overflow-x: clip;
}

.page-faq .container {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* 面包屑 */
.page-faq .breadcrumb {
  margin-bottom: clamp(20px, 3.5vw, 34px);
}

.page-faq .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--stone);
}

.page-faq .breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.page-faq .breadcrumb__link {
  color: var(--stone);
  text-decoration: none;
  transition: color 0.18s ease;
}

.page-faq .breadcrumb__link:hover,
.page-faq .breadcrumb__link:focus-visible {
  color: var(--amber);
}

.page-faq .breadcrumb__sep {
  color: rgba(140, 154, 163, 0.5);
}

.page-faq .breadcrumb__current {
  color: var(--paper);
}

/* 首屏框景 */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(26px, 5vw, 56px);
  border: 1px solid var(--line-strong);
  background:
    linear-gradient(172deg, rgba(18, 48, 74, 0.92) 0%, rgba(11, 27, 43, 0.55) 62%, rgba(11, 27, 43, 0.2) 100%);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 11px;
  border: 1px solid rgba(140, 154, 163, 0.14);
  pointer-events: none;
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  align-items: baseline;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.24em;
  color: var(--stone);
}

.page-faq .faq-hero__kicker {
  color: var(--mint);
}

.page-faq .faq-hero__stamp {
  color: var(--amber);
}

.page-faq .faq-hero h1 {
  position: relative;
  margin: clamp(18px, 3vw, 30px) 0 0;
  max-width: 20ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(29px, 6.2vw, 56px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-hero .lede {
  position: relative;
  margin: 20px 0 0;
  max-width: 48ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.75;
  color: var(--veil);
}

.page-faq .faq-hero__stats {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: clamp(26px, 4vw, 42px);
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-stat {
  padding: 0 14px;
  border-left: 1px solid var(--line);
}

.page-faq .faq-stat:first-child {
  padding-left: 0;
  border-left: 0;
}

.page-faq .faq-stat__num {
  display: block;
  font-size: clamp(24px, 4vw, 38px);
  line-height: 1;
  color: var(--amber);
}

.page-faq .faq-stat__cap {
  display: block;
  margin-top: 9px;
  font-size: 11.5px;
  letter-spacing: 0.14em;
  line-height: 1.5;
  color: var(--stone);
}

.page-faq .faq-hero__scale {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 9px;
  background-image: repeating-linear-gradient(90deg, rgba(140, 154, 163, 0.42) 0 1px, transparent 1px 26px);
  opacity: 0.55;
  pointer-events: none;
}

/* 首图 */
.page-faq .faq-cover {
  margin: clamp(24px, 4vw, 44px) 0 clamp(34px, 5vw, 66px);
  border: 1px solid var(--line);
  background: var(--ink-950);
}

.page-faq .faq-cover__img,
.page-faq .faq-flow .media-frame__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .media-frame__caption {
  padding: 12px 16px 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  line-height: 1.6;
  color: var(--stone);
  border-top: 1px solid var(--line);
}

/* 主体两栏 */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 5vw, 56px);
  align-items: start;
}

/* 左侧分类锚点 */
.page-faq .faq-rail {
  border-top: 1px solid var(--line-strong);
  padding-top: 16px;
}

.page-faq .faq-rail__label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.28em;
  color: var(--stone);
}

.page-faq .faq-rail__nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-faq .faq-rail__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: 9px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  color: var(--paper);
  text-decoration: none;
  font-size: 13.5px;
  line-height: 1.4;
  white-space: nowrap;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  border-color: var(--amber);
  background: rgba(221, 164, 59, 0.08);
  color: var(--amber);
}

.page-faq .faq-rail__num {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--stone);
}

.page-faq .faq-rail__link:hover .faq-rail__num,
.page-faq .faq-rail__link:focus-visible .faq-rail__num {
  color: var(--amber);
}

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

.page-faq .faq-rail__foot-text {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--veil-dim);
}

/* 问答分组 */
.page-faq .faq-group {
  scroll-margin-top: 96px;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(46px, 6vw, 88px);
}

.page-faq .faq-group__head {
  display: grid;
  gap: 8px;
  padding-top: 18px;
  border-top: 1px solid var(--line-strong);
}

.page-faq .faq-group__num {
  font-size: 11.5px;
  letter-spacing: 0.24em;
  color: var(--amber);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 3.2vw, 29px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-group__intro {
  margin: 0;
  max-width: 54ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--veil-dim);
}

.page-faq .faq-flow {
  margin: clamp(20px, 3vw, 30px) 0 0;
  border: 1px solid var(--line);
  background: var(--ink-950);
}

.page-faq .faq-list {
  margin-top: 20px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
  transition: background 0.24s ease;
}

.page-faq .faq-item[open] {
  background: var(--faq-card);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 17px 16px 17px 12px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-body);
  font-size: clamp(14.5px, 1.7vw, 16.5px);
  font-weight: 500;
  line-height: 1.55;
  color: var(--paper);
  transition: color 0.18s ease;
}

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

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

.page-faq .faq-item__q:hover,
.page-faq .faq-item__q:focus-visible {
  color: var(--amber);
}

.page-faq .faq-item__num {
  flex: 0 0 auto;
  padding-top: 3px;
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--stone);
}

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

.page-faq .faq-item__mark {
  position: relative;
  flex: 0 0 auto;
  width: 12px;
  height: 12px;
  margin-top: 7px;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--stone);
  transition: transform 0.22s ease, background 0.22s ease;
}

.page-faq .faq-item__mark::before {
  top: 5px;
  left: 0;
  width: 12px;
  height: 1.5px;
}

.page-faq .faq-item__mark::after {
  top: 0;
  left: 5.25px;
  width: 1.5px;
  height: 12px;
}

.page-faq .faq-item[open] .faq-item__mark::before {
  background: var(--amber);
}

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

.page-faq .faq-item__a {
  padding: 0 16px 22px 40px;
  animation: faq-answer-in 0.26s ease both;
}

.page-faq .faq-item__a p {
  margin: 0 0 10px;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--veil);
}

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

.page-faq .faq-related {
  font-size: 13px !important;
  letter-spacing: 0.02em;
  color: var(--stone) !important;
}

.page-faq .faq-link {
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid rgba(221, 164, 59, 0.38);
  transition: border-color 0.2s ease, color 0.2s ease;
}

.page-faq .faq-link:hover,
.page-faq .faq-link:focus-visible {
  border-bottom-color: var(--amber);
  color: #f0bd63;
}

@keyframes faq-answer-in {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* 兜底区块 */
.page-faq .faq-fallback {
  margin-top: clamp(48px, 7vw, 96px);
  padding: clamp(24px, 4vw, 44px);
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--amber);
  background: linear-gradient(118deg, rgba(18, 48, 74, 0.9) 0%, rgba(11, 27, 43, 0.62) 100%);
  display: grid;
  gap: 14px;
}

.page-faq .faq-fallback__label {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.28em;
  color: var(--mint);
}

.page-faq .faq-fallback__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 3vw, 27px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-fallback__text {
  margin: 0;
  max-width: 56ch;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--veil);
}

.page-faq .faq-fallback .button-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
}

@media (min-width: 700px) {
  .page-faq .faq-hero__stats {
    padding-top: 24px;
  }

  .page-faq .faq-item__q {
    padding: 19px 20px 19px 6px;
    gap: 16px;
  }

  .page-faq .faq-item__a {
    padding: 0 20px 24px 34px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 268px) minmax(0, 1fr);
    gap: clamp(44px, 5vw, 84px);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 104px;
    align-self: start;
  }

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

  .page-faq .faq-rail__link {
    display: flex;
    align-items: baseline;
    width: 100%;
    padding: 13px 2px;
    border: 0;
    border-bottom: 1px solid var(--line);
    white-space: normal;
    font-size: 14.5px;
    transition: color 0.2s ease, padding-left 0.2s ease;
  }

  .page-faq .faq-rail__link:first-child {
    border-top: 1px solid var(--line);
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    background: transparent;
    border-color: var(--line);
    border-bottom-color: var(--amber);
    padding-left: 10px;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-hero {
    padding: 64px 68px 72px;
  }

  .page-faq .faq-hero h1 {
    max-width: 22ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__a {
    animation: none;
  }

  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after,
  .page-faq .faq-item__q,
  .page-faq .faq-rail__link {
    transition: none;
  }
}
<<<END>>>