.page-faq {
  --faq-axis-w: 168px;
  --faq-line-soft: rgba(30, 74, 61, 0.72);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-masthead {
  position: relative;
  background-color: var(--ink);
  background-image:
    repeating-linear-gradient(to right, var(--faq-line-soft) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(to bottom, var(--faq-line-soft) 0 1px, transparent 1px 64px);
  border-bottom: 2px solid var(--carbon);
  padding-block: 34px 52px;
}

.page-faq .faq-masthead__inner {
  display: grid;
  gap: 36px;
  align-items: start;
}

.page-faq .faq-masthead__text h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(27px, 6.4vw, 52px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--paper);
  margin: 14px 0 0;
  max-width: 22em;
}

.page-faq .faq-masthead__lead {
  margin: 18px 0 0;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--gray);
}

.page-faq .faq-masthead__meta {
  margin: 30px 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-masthead__meta > div {
  background: var(--ink);
  padding: 12px 14px;
}

.page-faq .faq-masthead__meta dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--mid);
}

.page-faq .faq-masthead__meta dd {
  margin: 7px 0 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--yellow);
}

.page-faq .faq-masthead__figure {
  margin: 0;
}

/* ---------- 区块标题 ---------- */

.page-faq .faq-sechead h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 4.2vw, 38px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  margin: 12px 0 0;
  max-width: 26em;
}

.page-faq .faq-sechead p:last-child {
  margin: 16px 0 0;
  max-width: 46em;
  font-size: 15px;
  line-height: 1.75;
  opacity: 0.86;
}

/* ---------- 通用判断三条 ---------- */

.page-faq .faq-check {
  list-style: none;
  margin: 36px 0 0;
  padding: 0;
}

.page-faq .faq-check > li {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  column-gap: 14px;
  padding: 24px 0;
  border-top: 1px solid var(--line);
}

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

.page-faq .faq-check__num {
  grid-row: 1 / span 2;
  font-size: 26px;
  line-height: 1;
  color: var(--red);
  letter-spacing: -0.02em;
}

.page-faq .faq-check h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
}

.page-faq .faq-check p {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.75;
}

/* ---------- 分类型排查 ---------- */

.page-faq .faq-rail {
  display: grid;
  gap: 34px;
  margin-top: 44px;
}

.page-faq .faq-rail__axis ol {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
}

.page-faq .faq-rail__axis a {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--gray);
  text-decoration: none;
  padding: 5px 9px;
  border: 1px solid var(--line);
  transition: color 150ms ease-out, border-color 150ms ease-out, background-color 150ms ease-out;
}

.page-faq .faq-rail__axis a:hover,
.page-faq .faq-rail__axis a:focus-visible {
  color: var(--on-yellow);
  background: var(--yellow);
  border-color: var(--yellow);
  outline: none;
}

.page-faq .faq-rail__body {
  display: grid;
  gap: 0;
}

.page-faq .faq-block {
  padding: 26px 0 40px;
  border-top: 2px solid var(--line);
}

.page-faq .faq-block + .faq-block {
  margin-top: 14px;
}

.page-faq .faq-block__head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.page-faq .faq-block__num {
  font-size: clamp(38px, 9vw, 62px);
  line-height: 0.9;
  letter-spacing: -0.03em;
  color: var(--mid);
}

.page-faq .faq-block__head h3 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(18px, 3vw, 24px);
  line-height: 1.35;
  color: var(--paper);
}

/* ---------- 折叠条目 ---------- */

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

.page-faq .faq-item summary {
  position: relative;
  cursor: pointer;
  list-style: none;
  padding: 18px 40px 18px 0;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--paper);
  transition: color 150ms ease-out;
}

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

.page-faq .faq-item summary::after {
  content: "+";
  position: absolute;
  right: 6px;
  top: 17px;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--yellow);
  transition: transform 150ms ease-out;
}

.page-faq .faq-item[open] summary::after {
  content: "−";
  color: var(--red-lit);
}

.page-faq .faq-item summary:hover {
  color: var(--yellow);
}

.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 3px;
}

.page-faq .faq-item__body {
  margin-left: 2px;
  padding: 4px 0 22px 20px;
  border-left: 2px solid var(--line);
  transition: border-color 150ms ease-out;
}

.page-faq .faq-item[open] .faq-item__body {
  border-left-color: var(--red);
}

.page-faq .faq-steps {
  counter-reset: faqstep;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-steps li {
  counter-increment: faqstep;
  position: relative;
  padding-left: 34px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--gray);
}

.page-faq .faq-steps li + li {
  margin-top: 10px;
}

.page-faq .faq-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--mid);
}

.page-faq .faq-steps a {
  color: var(--red-lit);
  text-underline-offset: 3px;
}

.page-faq .faq-steps a:hover,
.page-faq .faq-steps a:focus-visible {
  color: var(--yellow);
}

/* ---------- 人工协助 ---------- */

.page-faq .faq-human {
  display: grid;
  gap: 34px;
  align-items: start;
}

.page-faq .faq-human__text h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 4.2vw, 38px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  margin: 12px 0 0;
  max-width: 24em;
}

.page-faq .faq-human__text > p {
  margin: 16px 0 0;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--gray);
}

.page-faq .faq-human__list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-human__list li {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--gray);
}

.page-faq .faq-human__list .mono {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--yellow);
}

.page-faq .faq-human__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  margin-top: 28px !important;
}

.page-faq .faq-human__figure {
  margin: 0;
}

/* ---------- 桌面 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-masthead__meta {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-block__head {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 20px;
    align-items: start;
  }

  .page-faq .faq-block__num {
    text-align: right;
  }

  .page-faq .faq-human {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-masthead {
    padding-block: 48px 72px;
  }

  .page-faq .faq-masthead__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: center;
  }

  .page-faq .faq-rail {
    grid-template-columns: var(--faq-axis-w) minmax(0, 1fr);
    gap: 60px;
    margin-top: 56px;
  }

  .page-faq .faq-rail__axis {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-rail__axis ol {
    flex-direction: column;
    gap: 8px;
  }

  .page-faq .faq-rail__axis a {
    display: block;
    width: 100%;
  }

  .page-faq .faq-check {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 40px;
  }

  .page-faq .faq-check > li {
    grid-template-columns: 52px minmax(0, 1fr);
    border-bottom: 1px solid var(--line);
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-masthead__inner {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: 72px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-rail__axis a,
  .page-faq .faq-item summary,
  .page-faq .faq-item summary::after,
  .page-faq .faq-item__body {
    transition: none;
  }
}
<<<END>>>