.page-faq {
  --faq-gap: clamp(20px, 3.2vw, 36px);
  --faq-indent: clamp(34px, 7vw, 54px);
  position: relative;
  padding-block: clamp(22px, 3.6vw, 40px) clamp(56px, 9vw, 112px);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.85;
}

.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

.page-faq::before {
  content: "";
  display: block;
  height: 1px;
  margin-bottom: clamp(22px, 3.6vw, 38px);
  background: linear-gradient(90deg, var(--ice), transparent 72%);
  opacity: .65;
}

.page-faq .breadcrumb {
  margin-bottom: clamp(20px, 3vw, 34px);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  padding-bottom: clamp(28px, 4.4vw, 52px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-size: clamp(30px, 5.4vw, 52px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-hero__lede {
  margin: 18px 0 0;
  max-width: 48ch;
  font-size: 16px;
  line-height: 1.9;
  color: var(--text);
}

.page-faq .faq-hero__meta {
  margin: 20px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .04em;
  color: var(--muted);
}

/* ---------- 分组索引 ---------- */

.page-faq .faq-toc {
  align-self: start;
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-faq .faq-toc__title {
  margin: 0;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--muted);
}

.page-faq .faq-toc__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-toc__list li + li {
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-toc__link {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 13px 16px;
  color: var(--text);
  font-size: 14.5px;
  text-decoration: none;
  transition: background-color .18s var(--ease), color .18s var(--ease);
}

.page-faq .faq-toc__link span {
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  color: var(--ice);
  transition: color .18s var(--ease);
}

.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  background: var(--ink-soft);
  color: var(--paper);
}

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

/* ---------- 问答分组 ---------- */

.page-faq .faq-group {
  scroll-margin-top: 96px;
  padding-block: clamp(34px, 5.6vw, 70px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: clamp(42px, 9vw, 82px);
  font-weight: 400;
  line-height: .84;
  letter-spacing: .02em;
  font-variant-numeric: tabular-nums;
  color: var(--ice);
}

@supports (-webkit-text-stroke: 1px #000) {
  .page-faq .faq-group__num {
    color: transparent;
    -webkit-text-stroke: 1px var(--ice);
  }
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(23px, 3.6vw, 31px);
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: -0.005em;
  color: var(--paper);
}

.page-faq .faq-group__lede {
  margin: 10px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.88;
  color: var(--muted);
}

/* ---------- 四步轴 ---------- */

.page-faq .step-rail {
  margin: clamp(24px, 3.6vw, 38px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: 1px solid var(--line);
}

.page-faq .step-rail__item {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 14px 2px;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .step-rail__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 20px;
  font-variant-numeric: tabular-nums;
  color: var(--ice);
}

.page-faq .step-rail__label {
  font-size: 15px;
  color: var(--text);
}

/* ---------- 图片 ---------- */

.page-faq .faq-figure {
  margin: clamp(24px, 4vw, 42px) 0 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 问答列表 ---------- */

.page-faq .faq-list {
  margin: clamp(22px, 3.6vw, 38px) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-item {
  position: relative;
  padding: 20px 0 22px var(--faq-indent);
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-q {
  margin: 0;
  font-family: var(--font-body);
  font-size: clamp(16px, 1.9vw, 17.5px);
  font-weight: 700;
  line-height: 1.65;
  color: var(--paper);
}

.page-faq .faq-q__num {
  position: absolute;
  left: 0;
  top: 26px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  letter-spacing: .08em;
  color: var(--amber);
}

.page-faq .faq-a {
  margin: 10px 0 0;
  max-width: 64ch;
  padding-left: 16px;
  border-left: 1px solid var(--line);
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--text);
}

/* ---------- 下一步 ---------- */

.page-faq .faq-next {
  padding-top: clamp(36px, 6vw, 68px);
}

.page-faq .faq-next__title {
  margin: 0 0 clamp(18px, 3vw, 30px);
  font-family: var(--font-head);
  font-size: clamp(20px, 3.1vw, 27px);
  font-weight: 700;
  line-height: 1.35;
  color: var(--paper);
}

.page-faq .faq-next__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.page-faq .faq-next__list li {
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-next__list li:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-next__link {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  grid-template-rows: auto auto;
  column-gap: 16px;
  row-gap: 4px;
  padding: 18px 12px;
  color: var(--text);
  text-decoration: none;
  transition: background-color .18s var(--ease);
}

.page-faq .faq-next__link:hover,
.page-faq .faq-next__link:focus-visible {
  background: var(--ink-soft);
}

.page-faq .faq-next__idx {
  grid-row: 1 / 3;
  font-family: var(--font-mono);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  letter-spacing: .08em;
  color: var(--pine);
  padding-top: 3px;
}

.page-faq .faq-next__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-next__desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 窄屏与宽屏适配 ---------- */

@media (max-width: 379px) {
  .page-faq .faq-item {
    padding-left: 30px;
  }

  .page-faq .faq-q__num {
    top: 24px;
  }
}

@media (min-width: 760px) {
  .page-faq .faq-group__head {
    grid-template-columns: minmax(84px, 116px) minmax(0, 1fr);
    column-gap: clamp(18px, 3vw, 42px);
    align-items: start;
  }

  .page-faq .step-rail {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    border-bottom: 1px solid var(--line-soft);
  }

  .page-faq .step-rail__item {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding: 18px 16px;
    border-bottom: 0;
    border-right: 1px solid var(--line-soft);
  }

  .page-faq .step-rail__item:last-child {
    border-right: 0;
  }

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

  .page-faq .faq-next__list li {
    border-bottom: 1px solid var(--line-soft);
  }
}

@media (min-width: 980px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-faq .faq-figure {
    max-width: 100%;
  }
}
<<<END>>>