.page-faq {
  --faq-flow-dot: 22px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: 18px;
  padding: clamp(18px, 4vw, 36px) 0 clamp(26px, 5vw, 44px);
  border-bottom: 1px solid var(--nv-line);
}

.page-faq .faq-hero__title {
  margin: 0;
  font-size: clamp(38px, 10vw, 92px);
  line-height: 1.02;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--nv-white);
}

.page-faq .faq-hero__title span {
  color: var(--nv-lime);
}

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

.page-faq .faq-hero__aside .nv-lede {
  margin: 0;
  max-width: 52ch;
  color: var(--nv-mute);
  font-size: 14px;
  line-height: 1.8;
}

.page-faq .faq-hero__keys {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0 0;
  padding: 0;
}

.page-faq .faq-hero__keys li {
  display: grid;
  gap: 2px;
  min-width: 92px;
  padding: 10px 16px 10px 14px;
  border: 1px solid var(--nv-line);
  background: linear-gradient(160deg, rgba(183, 255, 60, 0.08), rgba(11, 34, 51, 0.2));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%);
}

.page-faq .faq-hero__keys .nv-mono {
  font-size: 20px;
  font-weight: 600;
  color: var(--nv-lime);
  letter-spacing: 0.04em;
}

.page-faq .faq-hero__keys small {
  font-size: 11px;
  color: var(--nv-mute);
  letter-spacing: 0.08em;
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-shell {
  display: grid;
  gap: 8px;
  padding-bottom: clamp(40px, 7vw, 88px);
}

/* ---------- 左侧分类索引 ---------- */
.page-faq .faq-index {
  padding: 16px 0 4px;
  border-bottom: 1px solid var(--nv-line);
}

.page-faq .faq-index__title {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--nv-mute);
}

.page-faq .faq-index__list {
  list-style: none;
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 10px;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-faq .faq-index__list li {
  flex: 0 0 auto;
}

.page-faq .faq-index__list a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 13px;
  border: 1px solid var(--nv-line);
  color: var(--nv-white);
  font-size: 13px;
  white-space: nowrap;
  text-decoration: none;
  transition: border-color 0.2s var(--nv-ease), background-color 0.2s var(--nv-ease), color 0.2s var(--nv-ease);
}

.page-faq .faq-index__list a .nv-mono {
  font-size: 11px;
  color: var(--nv-lime);
  letter-spacing: 0.1em;
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  border-color: var(--nv-lime);
  background: rgba(183, 255, 60, 0.08);
  color: var(--nv-lime-soft);
}

.page-faq .faq-index__note {
  margin: 10px 0 14px;
  font-size: 12.5px;
  color: var(--nv-mute);
}

.page-faq .faq-index__note a {
  color: var(--nv-teal);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 问题分组 ---------- */
.page-faq .faq-group {
  counter-reset: faq;
  scroll-margin-top: calc(var(--nv-top-h) + 20px);
  padding-top: clamp(26px, 5vw, 46px);
}

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 16px;
  padding-top: clamp(18px, 3vw, 28px);
  border-top: 1px solid var(--nv-line);
}

.page-faq .faq-group__num {
  font-size: clamp(18px, 2.6vw, 26px);
  line-height: 1;
  color: var(--nv-lime);
  letter-spacing: 0.08em;
}

.page-faq .faq-group__head .nv-h2 {
  margin: 0;
  font-size: clamp(22px, 3.4vw, 34px);
  line-height: 1.25;
  letter-spacing: 0.04em;
  color: var(--nv-white);
}

.page-faq .faq-group__lead {
  flex: 1 1 100%;
  margin: 0;
  max-width: 58ch;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--nv-mute);
}

/* ---------- 图片 ---------- */
.page-faq .faq-fig {
  margin: 22px 0 6px;
  max-width: 400px;
}

.page-faq .faq-fig .nv-figure__media {
  aspect-ratio: 4 / 5;
}

.page-faq .faq-fig--wide {
  max-width: none;
}

.page-faq .faq-fig--wide .nv-figure__media {
  aspect-ratio: 3 / 2;
}

.page-faq .faq-fig .nv-figure__img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-faq .faq-fig .nv-figure__cap {
  font-size: 12px;
  line-height: 1.7;
  color: var(--nv-mute);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-list {
  margin-top: 18px;
  border-top: 1px solid var(--nv-line);
}

.page-faq .faq-item {
  counter-increment: faq;
  border-bottom: 1px solid var(--nv-line);
}

.page-faq .faq-item summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: 2.2em minmax(0, 1fr) auto;
  align-items: start;
  gap: 10px;
  padding: 17px 0;
  font-size: 14.5px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--nv-white);
  transition: color 0.2s var(--nv-ease);
}

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

.page-faq .faq-item summary:hover,
.page-faq .faq-item summary:focus-visible {
  color: var(--nv-lime-soft);
}

.page-faq .faq-item summary::before {
  content: counter(faq, decimal-leading-zero);
  font-family: var(--nv-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--nv-lime);
  padding-top: 4px;
}

.page-faq .faq-item summary::after {
  content: "";
  width: 9px;
  height: 9px;
  margin-top: 8px;
  border-right: 1.5px solid var(--nv-lime);
  border-bottom: 1.5px solid var(--nv-lime);
  transform: rotate(45deg);
  transition: transform 0.2s var(--nv-ease);
}

.page-faq .faq-item[open] summary::after {
  transform: rotate(-135deg);
}

.page-faq .faq-item__a {
  padding: 0 0 22px 2.2em;
}

.page-faq .faq-item__a p {
  margin: 0 0 12px;
  max-width: 62ch;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--nv-mute);
}

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

.page-faq .faq-item__a strong {
  color: var(--nv-lime-soft);
  font-weight: 600;
}

.page-faq .faq-item__a a {
  color: var(--nv-teal);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-item__a .nv-mono {
  color: var(--nv-white);
  font-size: 13px;
  letter-spacing: 0.03em;
  word-break: break-word;
}

/* ---------- 步骤 ---------- */
.page-faq .faq-flow {
  list-style: none;
  counter-reset: step;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-flow li {
  counter-increment: step;
  position: relative;
  padding-left: calc(var(--faq-flow-dot) + 16px);
  font-size: 13px;
  line-height: 1.7;
  color: var(--nv-white);
}

.page-faq .faq-flow li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 1px;
  width: var(--faq-flow-dot);
  height: var(--faq-flow-dot);
  display: grid;
  place-items: center;
  border: 1px solid var(--nv-lime);
  border-radius: 50%;
  font-family: var(--nv-font-mono);
  font-size: 10.5px;
  color: var(--nv-lime);
}

.page-faq .faq-flow li::after {
  content: "";
  position: absolute;
  left: calc(var(--faq-flow-dot) / 2);
  top: calc(var(--faq-flow-dot) + 4px);
  width: 1px;
  height: calc(100% + 12px - var(--faq-flow-dot) - 6px);
  background: var(--nv-line);
}

.page-faq .faq-flow li:last-child::after {
  display: none;
}

/* ---------- 提示与清单 ---------- */
.page-faq .faq-tip {
  margin: 14px 0 0 !important;
  padding: 10px 12px;
  border-left: 2px solid var(--nv-orange);
  background: linear-gradient(90deg, rgba(255, 138, 61, 0.1), rgba(255, 138, 61, 0) 72%);
  font-size: 12.5px !important;
  color: var(--nv-lime-soft) !important;
}

.page-faq .faq-checklist {
  list-style: none;
  display: grid;
  gap: 9px;
  margin: 0 0 14px;
  padding: 0;
}

.page-faq .faq-checklist li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--nv-white);
}

.page-faq .faq-checklist li::before {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  margin-top: 8px;
  background: var(--nv-lime);
  transform: rotate(45deg);
}

.page-faq .faq-item__a .nv-copy {
  margin-top: 4px;
  font-size: 12.5px;
}

/* ---------- 更多帮助 ---------- */
.page-faq .faq-links {
  display: grid;
  gap: 1px;
  margin-top: 20px;
  border: 1px solid var(--nv-line);
  background: var(--nv-line);
}

.page-faq .faq-links a {
  display: grid;
  gap: 4px;
  padding: 16px 18px;
  background: var(--nv-panel);
  text-decoration: none;
  transition: background-color 0.2s var(--nv-ease), box-shadow 0.2s var(--nv-ease);
}

.page-faq .faq-links a:hover,
.page-faq .faq-links a:focus-visible {
  background: rgba(183, 255, 60, 0.07);
  box-shadow: inset 2px 0 0 0 var(--nv-lime);
}

.page-faq .faq-links__k {
  font-size: 10.5px;
  letter-spacing: 0.2em;
  color: var(--nv-lime);
  text-transform: uppercase;
}

.page-faq .faq-links__t {
  font-size: 15px;
  font-weight: 600;
  color: var(--nv-white);
}

.page-faq .faq-links__d {
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--nv-mute);
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero__keys li {
    min-width: 108px;
    padding: 12px 20px 12px 16px;
  }

  .page-faq .faq-hero__keys .nv-mono {
    font-size: 24px;
  }

  .page-faq .faq-links {
    grid-template-columns: 1fr 1fr;
  }

  .page-faq .faq-fig {
    max-width: 320px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1024px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    align-items: end;
    column-gap: clamp(32px, 6vw, 88px);
    padding-bottom: clamp(36px, 5vw, 64px);
  }

  .page-faq .faq-hero .nv-eyebrow {
    grid-column: 1 / -1;
  }

  .page-faq .faq-hero__title {
    grid-column: 1;
  }

  .page-faq .faq-hero__aside {
    grid-column: 2;
    padding-bottom: 8px;
  }

  .page-faq .faq-shell {
    grid-template-columns: 196px minmax(0, 1fr);
    column-gap: clamp(36px, 5vw, 72px);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--nv-top-h) + 24px);
    border-bottom: 0;
    border-top: 1px solid var(--nv-line);
    padding-top: 18px;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
    gap: 2px;
  }

  .page-faq .faq-index__list a {
    width: 100%;
    border-color: transparent;
    border-left: 2px solid transparent;
    padding: 9px 10px 9px 12px;
    white-space: normal;
  }

  .page-faq .faq-index__list a:hover,
  .page-faq .faq-index__list a:focus-visible {
    border-color: transparent;
    border-left-color: var(--nv-lime);
    background: rgba(183, 255, 60, 0.06);
  }

  .page-faq .faq-index__note {
    margin-top: 18px;
    padding-top: 14px;
    border-top: 1px solid var(--nv-line);
    line-height: 1.7;
  }

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

  .page-faq .faq-group:first-child {
    padding-top: 0;
  }

  .page-faq .faq-group:first-child .faq-group__head {
    border-top: 0;
    padding-top: 0;
  }

  .page-faq .faq-fig--wide {
    max-width: 100%;
  }

  .page-faq .faq-item summary {
    padding: 20px 0;
    font-size: 15.5px;
  }

  .page-faq .faq-item__a {
    padding-bottom: 26px;
  }

  .page-faq .faq-item__a p {
    font-size: 14px;
  }
}

@media (min-width: 1280px) {
  .page-faq .faq-shell {
    grid-template-columns: 224px minmax(0, 1fr);
  }
}

/* ---------- 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__list a,
  .page-faq .faq-item summary,
  .page-faq .faq-item summary::after,
  .page-faq .faq-links a {
    transition: none;
  }
}
<<<END>>>