.page-faq {
  --faq-rail: 208px;
  --faq-fade: 240ms ease;
  background: var(--paper);
  color: var(--ink);
}

/* 首屏 */
.page-faq .guide-hero {
  max-width: 46rem;
  padding: 8px 0 34px;
}

.page-faq .guide-hero__eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--gold-deep);
}

.page-faq .guide-hero__title {
  margin: 0 0 18px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(30px, 6.4vw, 52px);
  line-height: 1.22;
  letter-spacing: .01em;
  color: var(--ink);
}

.page-faq .guide-hero__title::after {
  content: "";
  display: block;
  width: 56px;
  height: 4px;
  margin-top: 18px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--red), var(--gold));
}

.page-faq .guide-hero__lede {
  margin: 0;
  font-size: 16px;
  line-height: 1.95;
  color: var(--ink-soft);
}

/* 三段确认 */
.page-faq .guide-confirm {
  margin: 0 0 34px;
}

.page-faq .guide-section__title {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(22px, 4.4vw, 30px);
  line-height: 1.4;
  color: var(--ink);
}

.page-faq .guide-section__note {
  margin: 0 0 22px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-faq .confirm-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-faq .confirm-card {
  --accent: var(--jade);
  position: relative;
  padding: 26px 22px 24px;
  background: var(--paper-lit);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
  overflow: hidden;
}

.page-faq .confirm-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 3px;
  background: var(--accent);
  opacity: .85;
}

.page-faq .confirm-card:nth-child(2) { --accent: var(--red); }
.page-faq .confirm-card:nth-child(3) { --accent: var(--clay); }

.page-faq .confirm-card__num {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--accent);
}

.page-faq .confirm-card__title {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 600;
  color: var(--ink);
}

.page-faq .confirm-card__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--ink-soft);
}

.page-faq .confirm-card__text .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13.5px;
  color: var(--ink);
  background: var(--gold-pale);
  padding: 1px 5px;
  border-radius: 5px;
}

/* 图片 */
.page-faq .guide-figure {
  margin: 0 0 30px;
}

.page-faq .guide-figure img {
  display: block;
  width: 100%;
  max-width: 800px;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-lit);
  object-fit: cover;
}

.page-faq .guide-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--ink-soft);
}

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

.page-faq .guide-figure--mid img {
  max-width: 100%;
}

/* 问题索引 */
.page-faq .guide-index {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 42px;
}

.page-faq .guide-index__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper-lit);
  font-size: 13.5px;
  color: var(--ink);
  text-decoration: none;
  transition: border-color var(--faq-fade), color var(--faq-fade);
}

.page-faq .guide-index__link .mono {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--gold-deep);
}

.page-faq .guide-index__link:hover,
.page-faq .guide-index__link:focus-visible {
  border-color: var(--line-gold);
  color: var(--red);
}

/* 目录 + 问答流 */
.page-faq .guide-body {
  padding-bottom: 56px;
}

.page-faq .guide-rail {
  margin: 0 0 34px;
}

.page-faq .guide-rail__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.page-faq .guide-rail__list {
  display: flex;
  gap: 18px;
  margin: 0;
  padding: 0 0 10px;
  list-style: none;
  overflow-x: auto;
  border-bottom: 1px solid var(--line);
  scrollbar-width: none;
}

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

.page-faq .guide-rail__link {
  display: block;
  padding: 4px 0;
  white-space: nowrap;
  font-size: 13px;
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color var(--faq-fade), border-color var(--faq-fade);
}

.page-faq .guide-rail__link:hover,
.page-faq .guide-rail__link:focus-visible {
  color: var(--red);
  border-bottom-color: var(--gold);
}

/* 章节 */
.page-faq .guide-sec {
  margin: 0 0 50px;
  scroll-margin-top: 96px;
}

.page-faq .guide-sec:last-child {
  margin-bottom: 0;
}

.page-faq .guide-sec .chapter {
  margin: 0;
}

.page-faq .guide-sec .chapter__num {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--gold-deep);
}

.page-faq .guide-sec .chapter__title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(21px, 4.2vw, 28px);
  font-weight: 600;
  line-height: 1.45;
  color: var(--ink);
}

.page-faq .guide-sec .chapter::after {
  content: "";
  display: block;
  height: 1px;
  margin: 18px 0 2px;
  background: var(--line-gold-soft);
}

/* 折叠问答 */
.page-faq .qa-list {
  margin: 0;
}

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

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 18px 0;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-serif);
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink);
  transition: color var(--faq-fade);
}

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

.page-faq .qa__q:hover {
  color: var(--red);
}

.page-faq .qa__q::after {
  content: "+";
  flex: none;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 400;
  line-height: 1.5;
  color: var(--jade);
}

.page-faq .qa[open] .qa__q::after {
  content: "–";
}

.page-faq .qa__a {
  padding: 0 0 20px;
  font-size: 15px;
  line-height: 1.95;
  color: var(--ink-soft);
}

.page-faq .qa__a p {
  margin: 0 0 10px;
}

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

.page-faq .qa__a a,
.page-faq .help-card__text a {
  color: var(--red);
  text-decoration: none;
  border-bottom: 1px solid var(--line-gold);
}

.page-faq .qa__a a:hover,
.page-faq .help-card__text a:hover {
  border-bottom-color: var(--red);
}

.page-faq .qa__a .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13.5px;
  color: var(--ink);
  background: var(--gold-pale);
  padding: 1px 5px;
  border-radius: 5px;
}

/* 联系卡 */
.page-faq .help-card {
  margin-top: 10px;
  padding: 26px 22px;
  background: var(--paper-lit);
  border: 1px solid var(--line-gold-soft);
  border-left: 4px solid var(--red);
  border-radius: var(--radius);
}

.page-faq .help-card__text {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink);
}

.page-faq .help-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 14px;
  padding: 11px 0;
  border-top: 1px dashed var(--line);
  font-size: 14px;
}

.page-faq .help-row:first-of-type {
  border-top: 0;
}

.page-faq .help-row__label {
  min-width: 64px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--ink-soft);
}

.page-faq .help-row__value {
  flex: 1 1 auto;
  min-width: 0;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.page-faq .help-row__value.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13.5px;
}

.page-faq .copy-btn {
  flex: none;
  padding: 5px 12px;
  font-family: var(--font-sans);
  font-size: 12.5px;
  color: var(--gold-deep);
  background: transparent;
  border: 1px solid var(--line-gold);
  border-radius: 999px;
  cursor: pointer;
  transition: background var(--faq-fade), color var(--faq-fade);
}

.page-faq .copy-btn:hover,
.page-faq .copy-btn:focus-visible {
  background: var(--gold-pale);
  color: var(--ink);
}

.page-faq .help-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

/* 平板与桌面 */
@media (min-width: 760px) {
  .page-faq .confirm-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

  .page-faq .guide-hero {
    padding: 20px 0 40px;
  }
}

@media (min-width: 980px) {
  .page-faq .guide-body {
    display: grid;
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
    padding-bottom: 72px;
  }

  .page-faq .guide-rail {
    position: sticky;
    top: 104px;
    margin: 0;
  }

  .page-faq .guide-rail__list {
    display: block;
    gap: 0;
    padding: 0;
    overflow: visible;
    border-bottom: 0;
    border-left: 1px solid var(--line);
  }

  .page-faq .guide-rail__link {
    margin-left: -1px;
    padding: 9px 0 9px 16px;
    white-space: normal;
    border-bottom: 0;
    border-left: 2px solid transparent;
  }

  .page-faq .guide-rail__link:hover,
  .page-faq .guide-rail__link:focus-visible {
    border-bottom-color: transparent;
    border-left-color: var(--gold);
  }

  .page-faq .guide-sec {
    margin-bottom: 60px;
  }
}

@media (max-width: 560px) {
  .page-faq .confirm-card {
    padding: 22px 18px 20px;
  }

  .page-faq .qa__q {
    font-size: 15.5px;
  }

  .page-faq .help-card {
    padding: 20px 16px;
  }

  .page-faq .help-row__label {
    min-width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .guide-index__link,
  .page-faq .guide-rail__link,
  .page-faq .qa__q,
  .page-faq .copy-btn {
    transition: none;
  }
}
<<<END>>>