.page-faq {
  --faq-line: var(--grid-line);
  font-family: var(--f-body);
  color: var(--text-bright);
  background: var(--ink-deep);
}

/* 面包屑 */
.page-faq .crumbs {
  padding-block: 14px;
  border-bottom: 1px solid var(--faq-line);
}
.page-faq .crumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--f-mono);
  font-size: 13px;
  color: var(--text-muted);
}
.page-faq .crumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--text-dim);
}
.page-faq .crumbs a {
  color: var(--text-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t-base) var(--ease), border-color var(--t-base) var(--ease);
}
.page-faq .crumbs a:hover,
.page-faq .crumbs a:focus-visible {
  color: var(--volt);
  border-bottom-color: var(--volt);
}

/* 首屏 */
.page-faq .faq-hero {
  padding-block: clamp(32px, 6vw, 72px);
  border-bottom: 1px solid var(--faq-line);
}
.page-faq .faq-hero__grid {
  display: grid;
  gap: 32px;
}
.page-faq .faq-hero__title {
  margin: 16px 0 0;
  font-family: var(--f-display);
  font-size: clamp(2rem, 6vw, 3.6rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
}
.page-faq .faq-hero__lede {
  margin: 18px 0 0;
  color: var(--text-muted);
}
.page-faq .faq-hero__media {
  margin: 0;
  border: 1px solid var(--faq-line);
}
.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
}

.page-faq .faq-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  background: var(--faq-line);
  border: 1px solid var(--faq-line);
}
.page-faq .faq-facts li {
  min-width: 0;
  padding: 14px 16px;
  background: var(--ink-deep);
}
.page-faq .faq-facts b {
  display: block;
  font-family: var(--f-mono);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--volt);
  line-height: 1.1;
}
.page-faq .faq-facts span {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  color: var(--text-muted);
}

/* 主体两段式 */
.page-faq .faq-body {
  display: grid;
  gap: 24px;
  padding-block: clamp(24px, 4vw, 48px);
}
.page-faq .faq-main {
  min-width: 0;
}

/* 侧边索引 */
.page-faq .faq-index {
  min-width: 0;
  max-width: 100%;
  border: 1px solid var(--faq-line);
  background: var(--night-blue);
}
.page-faq .faq-index__title {
  margin: 0;
  padding: 11px 14px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--text-dim);
  border-bottom: 1px solid var(--faq-line);
}
.page-faq .faq-index__list {
  display: flex;
  margin: 0;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.page-faq .faq-index__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  font-size: 13px;
  white-space: nowrap;
  color: var(--text-muted);
  text-decoration: none;
  border-right: 1px solid var(--faq-line);
  transition: color var(--t-base) var(--ease), background var(--t-base) var(--ease);
}
.page-faq .faq-index__link .mono {
  font-family: var(--f-mono);
  font-size: 12px;
  color: var(--volt);
  transition: color var(--t-base) var(--ease);
}
.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--ink-deep);
  background: var(--volt);
}
.page-faq .faq-index__link:hover .mono,
.page-faq .faq-index__link:focus-visible .mono {
  color: var(--ink-deep);
}

/* 章节 */
.page-faq .faq-sec {
  padding-block: clamp(26px, 4vw, 44px);
  border-top: 1px solid var(--faq-line);
}
.page-faq .faq-sec:first-child {
  padding-top: 0;
  border-top: 0;
}
.page-faq .faq-sec:target {
  box-shadow: inset 0 0 0 1px var(--volt);
}
.page-faq .faq-sec__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 14px;
}
.page-faq .faq-sec__head h2 {
  margin: 0;
  font-size: clamp(1.35rem, 3.4vw, 2rem);
  line-height: 1.15;
}
.page-faq .faq-sec__num {
  flex: none;
  padding: 2px 8px;
  font-family: var(--f-mono);
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  color: var(--volt);
  background: var(--turf);
  border: 1px solid var(--faq-line);
}
.page-faq .faq-sec__lede {
  margin: 0 0 20px;
  color: var(--text-muted);
}
.page-faq .faq-sec .prose {
  margin: 0 0 16px;
  color: var(--text-muted);
}
.page-faq .faq-sec .prose:last-child {
  margin-bottom: 0;
}
.page-faq .faq-sec .prose a {
  color: var(--volt);
  text-decoration: none;
  border-bottom: 1px solid var(--grid-line);
  transition: border-color var(--t-base) var(--ease);
}
.page-faq .faq-sec .prose a:hover,
.page-faq .faq-sec .prose a:focus-visible {
  border-bottom-color: var(--volt);
}
.page-faq .faq-sub {
  margin: 0 0 10px;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-bright);
}

/* 步骤卡 */
.page-faq .faq-steps {
  display: grid;
  gap: 1px;
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
  background: var(--faq-line);
  border: 1px solid var(--faq-line);
}
.page-faq .faq-step {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 18px;
  background: var(--turf);
  transition: transform var(--t-base) var(--ease), background var(--t-base) var(--ease);
}
.page-faq .faq-step:hover,
.page-faq .faq-step:focus-within {
  background: var(--night-blue);
  transform: translateY(-2px);
}
.page-faq .faq-step__num {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--amber);
}
.page-faq .faq-step__title {
  margin: 0 0 6px;
  font-size: 1.05rem;
  line-height: 1.35;
}
.page-faq .faq-step__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-muted);
}

/* 提示块 */
.page-faq .faq-hint {
  margin: 0 0 20px;
  padding: 14px 16px;
  background: var(--night-blue);
  border-left: 3px solid var(--amber);
}
.page-faq .faq-hint__title {
  margin: 0 0 6px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--amber);
}
.page-faq .faq-hint p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-muted);
}

/* 清单 */
.page-faq .faq-check {
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--faq-line);
}
.page-faq .faq-check li {
  position: relative;
  padding: 12px 0 12px 28px;
  border-bottom: 1px solid var(--faq-line);
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-muted);
}
.page-faq .faq-check li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 19px;
  width: 10px;
  height: 10px;
  border: 1px solid var(--volt);
}
.page-faq .faq-check li strong {
  color: var(--text-bright);
  font-weight: 600;
}
.page-faq .faq-check li:last-child {
  border-bottom: 0;
}

/* 图文分栏 */
.page-faq .faq-media-split {
  display: grid;
  gap: 24px;
}
.page-faq .faq-media-split > div {
  min-width: 0;
}
.page-faq .faq-figure {
  margin: 0;
  border: 1px solid var(--faq-line);
}
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* 双栏对照 */
.page-faq .faq-pair {
  display: grid;
  gap: 16px;
}
.page-faq .faq-pair__cell {
  min-width: 0;
  padding: 18px;
  background: var(--ink-deep);
  border: 1px solid var(--faq-line);
}
.page-faq .faq-pair__cell .faq-check {
  margin-bottom: 0;
  border-top: 0;
}
.page-faq .faq-pair__cell .faq-check li:first-child {
  padding-top: 0;
}
.page-faq .faq-pair__cell .faq-check li:first-child::before {
  top: 7px;
}
.page-faq .faq-tag {
  display: inline-block;
  margin-bottom: 10px;
  padding: 2px 8px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--volt);
  border: 1px solid var(--volt);
}
.page-faq .faq-tag--dim {
  color: var(--text-muted);
  border-color: var(--text-dim);
}

/* 折叠问答 */
.page-faq .faq-questions {
  border-top: 1px solid var(--faq-line);
}
.page-faq .faq-q {
  border-bottom: 1px solid var(--faq-line);
}
.page-faq .faq-q summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 14px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-bright);
  transition: color var(--t-base) var(--ease);
}
.page-faq .faq-q summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-q summary:hover {
  color: var(--volt);
}
.page-faq .faq-q summary:focus-visible {
  outline: 2px solid var(--volt);
  outline-offset: 3px;
}
.page-faq .faq-q__no {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  transition: color var(--t-base) var(--ease);
}
.page-faq .faq-q[open] .faq-q__no {
  color: var(--volt);
}
.page-faq .faq-q__mark {
  position: relative;
  width: 14px;
  height: 14px;
  align-self: center;
}
.page-faq .faq-q__mark::before,
.page-faq .faq-q__mark::after {
  content: "";
  position: absolute;
  background: var(--volt);
}
.page-faq .faq-q__mark::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 1px;
}
.page-faq .faq-q__mark::after {
  left: 6px;
  top: 0;
  width: 1px;
  height: 14px;
  transition: transform var(--t-base) var(--ease);
}
.page-faq .faq-q[open] .faq-q__mark::after {
  transform: scaleY(0);
}
.page-faq .faq-q__a {
  padding: 0 0 18px 34px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-muted);
}
.page-faq .faq-q__a:focus-visible {
  outline: 2px solid var(--volt);
  outline-offset: 4px;
}
.page-faq .faq-q__a p {
  margin: 0;
}

/* 延伸入口 */
.page-faq .faq-next {
  padding-block: clamp(36px, 5vw, 64px);
  border-top: 1px solid var(--faq-line);
  background: var(--night-blue);
}
.page-faq .faq-next h2 {
  margin: 0;
  font-size: clamp(1.3rem, 3.2vw, 1.9rem);
}
.page-faq .faq-next__grid {
  display: grid;
  gap: 1px;
  margin-top: 22px;
  background: var(--faq-line);
  border: 1px solid var(--faq-line);
}
.page-faq .faq-next__card {
  display: block;
  min-width: 0;
  padding: 18px;
  background: var(--night-blue);
  color: var(--text-bright);
  text-decoration: none;
  transition: background var(--t-base) var(--ease), transform var(--t-base) var(--ease);
}
.page-faq .faq-next__card:hover,
.page-faq .faq-next__card:focus-visible {
  background: var(--turf);
  transform: translateY(-2px);
}
.page-faq .faq-next__card h3 {
  margin: 0 0 6px;
  font-size: 1rem;
}
.page-faq .faq-next__card p {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--text-muted);
}

/* 宽屏 */
@media (min-width: 700px) {
  .page-faq .faq-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-faq .faq-pair {
    gap: 1px;
    background: var(--faq-line);
    border: 1px solid var(--faq-line);
  }
  .page-faq .faq-pair__cell {
    border: 0;
    background: var(--ink-deep);
    padding: 20px;
  }
  .page-faq .faq-next__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: clamp(32px, 5vw, 64px);
    align-items: start;
  }
  .page-faq .faq-media-split {
    grid-template-columns: minmax(0, 1fr) 240px;
    gap: 32px;
    align-items: start;
  }
  .page-faq .faq-step {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 20px;
    align-items: start;
  }
  .page-faq .faq-next__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-body {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
    align-items: start;
  }
  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--bar-h) + 20px);
  }
  .page-faq .faq-index__list {
    flex-direction: column;
    overflow: visible;
  }
  .page-faq .faq-index__link {
    border-right: 0;
    border-bottom: 1px solid var(--faq-line);
    white-space: normal;
  }
  .page-faq .faq-index__link:last-child {
    border-bottom: 0;
  }
}
<<<END>>>