.page-faq {
  --faq-rail-w: 246px;
  --faq-mono-bg: rgba(240, 168, 60, .14);
  background: var(--paper);
  color: var(--text-ink);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  background: var(--ink);
  color: var(--paper);
  padding: 32px 0 44px;
  border-bottom: 1px solid var(--line-dark);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 34%;
  height: 1px;
  background: var(--signal);
  opacity: .7;
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  align-items: end;
}

.page-faq .faq-hero h1 {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-size: clamp(26px, 7vw, 44px);
  line-height: 1.2;
  letter-spacing: .02em;
  color: var(--paper);
}

.page-faq .faq-hero__lede {
  margin: 18px 0 0;
  max-width: 40ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--graphite);
}

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

/* ---------- 主体分栏 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 40px;
  padding-top: 44px;
  padding-bottom: 64px;
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-rail__label {
  margin: 0 0 12px;
  font-family: var(--font-label);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--amber-deep);
}

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

.page-faq .faq-rail__list a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 0 12px 12px;
  border-bottom: 1px solid var(--paper-line);
  border-left: 2px solid transparent;
  font-size: 15px;
  line-height: 1.5;
  color: var(--text-ink);
  text-decoration: none;
  transition: color var(--ease), border-color var(--ease);
}

.page-faq .faq-rail__list a:hover,
.page-faq .faq-rail__list a:focus-visible {
  color: var(--amber-deep);
  border-left-color: var(--amber);
  outline: none;
}

.page-faq .faq-rail__list a:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

.page-faq .faq-rail__list a[aria-current="true"] {
  color: var(--ink);
  font-weight: 600;
  border-left-color: var(--signal);
}

.page-faq .faq-rail__list a[aria-current="true"] .faq-rail__num {
  color: var(--amber-deep);
}

.page-faq .faq-rail__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--graphite);
}

.page-faq .faq-rail__note {
  margin-top: 24px;
  padding: 16px 16px 18px;
  border: 1px solid var(--paper-line);
  background: rgba(18, 34, 44, .04);
}

.page-faq .faq-rail__note-title {
  margin: 0 0 8px;
  font-family: var(--font-label);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--ink);
}

.page-faq .faq-rail__note p {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-ink);
}

.page-faq .faq-rail__note p:last-of-type {
  margin-bottom: 16px;
}

/* ---------- 问答区块 ---------- */
.page-faq .faq-block {
  scroll-margin-top: 32px;
}

.page-faq .faq-block + .faq-block {
  margin-top: 52px;
  padding-top: 44px;
  border-top: 1px solid var(--paper-line);
}

.page-faq .faq-block__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 2px 16px;
  align-items: baseline;
  margin-bottom: 24px;
}

.page-faq .faq-block__num {
  grid-row: 1 / span 2;
  font-family: var(--font-display);
  font-size: clamp(24px, 6vw, 32px);
  line-height: 1;
  color: var(--amber-deep);
}

.page-faq .faq-block__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 4.4vw, 26px);
  line-height: 1.35;
  letter-spacing: .02em;
  color: var(--ink);
}

.page-faq .faq-block__intro {
  grid-column: 2;
  margin: 10px 0 0;
  max-width: 38ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-ink);
}

.page-faq .faq-figure {
  margin: 0 0 26px;
}

/* ---------- 检索提示块 ---------- */
.page-faq .faq-hint {
  margin-bottom: 24px;
  padding: 18px 18px 20px;
  border: 1px solid var(--paper-line);
  border-left: 2px solid var(--signal);
  background: rgba(18, 34, 44, .04);
}

.page-faq .faq-hint__title {
  margin: 0 0 12px;
  font-family: var(--font-label);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--ink);
}

.page-faq .faq-hint__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}

.page-faq .faq-hint__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text-ink);
}

.page-faq .faq-hint__code {
  flex: none;
  padding: 2px 8px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--amber-deep);
  background: var(--faq-mono-bg);
  border: 1px solid rgba(184, 121, 31, .38);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-list {
  border-top: 1px solid var(--paper-line);
}

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

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 17px 0;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.7;
  color: var(--ink);
  transition: color var(--ease);
}

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

.page-faq .faq-item > summary::after {
  content: "+";
  flex: none;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1.6;
  color: var(--amber-deep);
  transition: color var(--ease);
}

.page-faq .faq-item[open] > summary::after {
  content: "\2212";
  color: var(--signal);
}

.page-faq .faq-item > summary:hover {
  color: var(--amber-deep);
}

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

.page-faq .faq-item__body {
  padding: 0 0 20px;
}

.page-faq .faq-item__body p {
  margin: 0;
  max-width: 44ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-ink);
}

.page-faq .faq-item__body p + p {
  margin-top: 10px;
}

.page-faq .faq-item__body a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--amber-deep);
  transition: color var(--ease), border-color var(--ease);
}

.page-faq .faq-item__body a:hover,
.page-faq .faq-item__body a:focus-visible {
  color: var(--amber-deep);
  border-bottom-color: var(--signal);
}

.page-faq .faq-mono {
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: .04em;
  padding: 1px 6px;
  color: var(--amber-deep);
  background: var(--faq-mono-bg);
}

/* ---------- 流程带 ---------- */
.page-faq .faq-flow {
  padding: 48px 0 56px;
  background: var(--ink-2);
  color: var(--paper);
  border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}

.page-faq .faq-flow__head h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(21px, 4.6vw, 30px);
  line-height: 1.3;
  letter-spacing: .02em;
  color: var(--paper);
}

.page-faq .faq-flow__track {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

.page-faq .faq-flow__node {
  position: relative;
  padding-top: 20px;
  border-top: 1px solid var(--line-dark);
}

.page-faq .faq-flow__node::before {
  content: "";
  position: absolute;
  top: -4px;
  left: 0;
  width: 8px;
  height: 8px;
  background: var(--signal);
}

.page-faq .faq-flow__node:last-child::before {
  background: var(--amber);
}

.page-faq .faq-flow__step {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--wave);
}

.page-faq .faq-flow__node h3 {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-size: 19px;
  line-height: 1.4;
  color: var(--paper);
}

.page-faq .faq-flow__node p {
  margin: 0;
  max-width: 30ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--graphite);
}

/* ---------- 联系带 ---------- */
.page-faq .faq-help {
  padding: 52px 0 64px;
  background: var(--paper);
  border-top: 1px solid var(--paper-line);
}

.page-faq .faq-help__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}

.page-faq .faq-help__text h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(21px, 4.6vw, 30px);
  line-height: 1.35;
  letter-spacing: .02em;
  color: var(--ink);
}

.page-faq .faq-help__text p {
  margin: 14px 0 22px;
  max-width: 40ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-ink);
}

.page-faq .faq-help__contact {
  margin: 0;
  border-top: 1px solid var(--paper-line);
}

.page-faq .faq-help__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--paper-line);
}

.page-faq .faq-help__key {
  font-family: var(--font-label);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--amber-deep);
}

.page-faq .faq-help__value {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
  word-break: break-word;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-hint__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-flow__track {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 30px 28px;
  }

  .page-faq .faq-help__row {
    grid-template-columns: 120px minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: 46px 0 66px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 56px;
  }

  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: 56px;
    padding-top: 60px;
    padding-bottom: 80px;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 28px;
    align-self: start;
  }

  .page-faq .faq-block__head {
    gap: 4px 22px;
  }

  .page-faq .faq-flow {
    padding: 64px 0 72px;
  }

  .page-faq .faq-flow__track {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0 32px;
    margin-top: 36px;
  }

  .page-faq .faq-help {
    padding: 72px 0 84px;
  }

  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: 64px;
    align-items: start;
  }
}
<<<END>>>