.page-faq {
  --faq-gutter: clamp(26px, 5vw, 54px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: var(--ivory);
  border-bottom: 1px solid var(--ink-16);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -15% -5% auto -5%;
  height: 140%;
  background-image:
    linear-gradient(to right, var(--ink-16) 1px, transparent 1px),
    linear-gradient(to bottom, var(--ink-16) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: .45;
  pointer-events: none;
}

.page-faq .faq-hero-inner {
  position: relative;
  z-index: 1;
  padding-block: clamp(20px, 4vw, 42px) clamp(22px, 3vw, 34px);
}

.page-faq .faq-kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 16px 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--jade);
}

.page-faq .faq-kicker::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--cinnabar);
  flex: 0 0 auto;
}

.page-faq .faq-title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 6vw, 52px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-faq .faq-lead {
  margin: 0 0 22px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-70);
}

.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.page-faq .faq-jump-label {
  margin-right: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--ink-45);
}

.page-faq .faq-jump-link {
  display: inline-block;
  padding: 6px 12px;
  border: 1px solid var(--ink-16);
  background: var(--tile);
  color: var(--ink);
  font-size: 13px;
  line-height: 1.4;
  text-decoration: none;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-jump-link:hover,
.page-faq .faq-jump-link:focus-visible {
  background: var(--jade);
  border-color: var(--jade);
  color: var(--tile);
}

.page-faq .faq-figure {
  margin: 24px 0 0;
  border: 1px solid var(--ink-16);
  background: var(--mist);
  overflow: hidden;
}

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

.page-faq .faq-figure--inline {
  max-width: 620px;
  margin: 0 0 20px;
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  padding-block: clamp(28px, 5vw, 52px) clamp(44px, 7vw, 84px);
}

/* ---------- 索引 ---------- */
.page-faq .faq-toc {
  border: 1px solid var(--ink-16);
  background: var(--tile);
  padding: 14px 12px;
  align-self: start;
}

.page-faq .faq-toc-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--ink-45);
}

.page-faq .faq-toc nav {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding-bottom: 4px;
}

.page-faq .faq-toc .toc-link {
  flex: 0 0 auto;
  display: block;
  padding: 7px 10px;
  border-bottom: 2px solid transparent;
  color: var(--ink-70);
  font-size: 13.5px;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-toc .toc-link:hover,
.page-faq .faq-toc .toc-link:focus-visible {
  color: var(--ink);
  background: var(--ivory);
}

.page-faq .faq-toc .toc-link.is-active {
  color: var(--cinnabar-deep);
  border-bottom-color: var(--cinnabar);
  background: var(--ivory);
  font-weight: 600;
}

/* ---------- 章节 ---------- */
.page-faq .faq-section {
  scroll-margin-top: 92px;
  margin-bottom: 44px;
}

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

.page-faq .faq-section-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 14px;
  padding-top: 12px;
  border-top: 2px solid var(--ink);
}

.page-faq .faq-section-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--gold);
}

.page-faq .faq-section-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 3.4vw, 28px);
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-section-note {
  margin: 0 0 18px;
  max-width: 66ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-70);
}

.page-faq .faq-section-note a {
  color: var(--jade);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-item {
  margin-bottom: 10px;
  border: 1px solid var(--ink-16);
  background: var(--tile);
  transition: border-color var(--dur) var(--ease);
}

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

.page-faq .faq-item > summary {
  position: relative;
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px 44px 14px 14px;
  list-style: none;
  cursor: pointer;
  color: var(--ink);
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.55;
  transition: background var(--dur) var(--ease);
}

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

.page-faq .faq-item > summary:hover {
  background: var(--ivory);
}

.page-faq .faq-item > summary::after {
  content: "+";
  position: absolute;
  right: 14px;
  top: 12px;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 600;
  line-height: 1;
  color: var(--jade);
  transition: transform var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-item[open] > summary::after {
  transform: rotate(45deg);
  color: var(--cinnabar);
}

.page-faq .faq-q-index {
  flex: 0 0 auto;
  padding-top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--gold);
}

.page-faq .faq-q-text {
  min-width: 0;
}

.page-faq .faq-a {
  margin: 0 14px;
  padding: 12px 0 16px;
  border-top: 1px dashed var(--ink-16);
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-70);
}

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

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

.page-faq .faq-a strong {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 13.5px;
  color: var(--ink);
  word-break: break-all;
}

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

/* ---------- 千分区间 ---------- */
.page-faq .faq-ranks {
  display: grid;
  gap: 6px;
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-rank {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 16px;
  padding: 10px 14px;
  border-left: 3px solid var(--jade);
  background: var(--tile);
}

.page-faq .faq-rank:nth-child(2) {
  border-left-color: var(--teal);
}

.page-faq .faq-rank:nth-child(3) {
  border-left-color: var(--gold);
}

.page-faq .faq-rank:nth-child(4) {
  border-left-color: var(--cinnabar);
}

.page-faq .faq-rank:nth-child(5) {
  border-left-color: var(--cinnabar-deep);
}

.page-faq .faq-rank-range {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--teal);
  min-width: 108px;
}

.page-faq .faq-rank-desc {
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-70);
}

/* ---------- 准备清单 ---------- */
.page-faq .faq-checklist {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-checklist li {
  display: grid;
  grid-template-columns: 12px minmax(0, 1fr);
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--ink-16);
  background: var(--tile);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-70);
}

.page-faq .faq-checklist strong {
  color: var(--ink);
  font-weight: 600;
}

.page-faq .faq-check-mark {
  width: 10px;
  height: 10px;
  margin-top: 9px;
  background: var(--gold);
}

/* ---------- 支持区 ---------- */
.page-faq .faq-support {
  padding: clamp(20px, 4vw, 32px);
  background: var(--teal);
  color: var(--paper-70);
  border: 1px solid var(--ink);
}

.page-faq .faq-support-lead {
  margin: 0 0 20px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--paper-70);
}

.page-faq .faq-contact-grid {
  display: grid;
  gap: 14px;
}

.page-faq .faq-contact {
  padding-top: 12px;
  border-top: 1px solid var(--paper-16);
}

.page-faq .faq-contact-label {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--gold);
}

.page-faq .faq-contact-value {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ivory);
  word-break: break-all;
}

.page-faq .faq-contact-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--paper-45);
}

.page-faq .faq-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.page-faq .faq-link {
  display: inline-block;
  padding: 7px 13px;
  border: 1px solid var(--ink-16);
  color: var(--ink);
  font-size: 13px;
  text-decoration: none;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-link:hover,
.page-faq .faq-link:focus-visible {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--ivory);
}

/* ---------- 平板 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-contact-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 24px;
  }

  .page-faq .faq-rank-range {
    min-width: 124px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-body {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: var(--faq-gutter);
  }

  .page-faq .faq-toc {
    position: sticky;
    top: 96px;
    padding: 18px 14px;
  }

  .page-faq .faq-toc nav {
    display: grid;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-toc .toc-link {
    border-bottom: 0;
    border-left: 2px solid transparent;
    padding: 8px 10px;
    white-space: normal;
  }

  .page-faq .faq-toc .toc-link.is-active {
    border-left-color: var(--cinnabar);
  }

  .page-faq .faq-item > summary {
    padding: 16px 52px 16px 18px;
    font-size: 16px;
  }

  .page-faq .faq-a {
    margin: 0 18px;
    padding: 14px 0 20px;
    font-size: 15px;
  }

  .page-faq .faq-contact-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-figure--inline {
    margin-bottom: 24px;
  }
}

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