/* ===== 帮助中心 /help-center/ ===== */
.page-faq {
  --faq-body-text: #2C384E;
  --faq-hairline: rgba(233, 238, 246, .16);
  background: var(--white);
  color: var(--ink);
}

.page-faq .faq-mono,
.page-faq .faq-mail {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .02em;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  padding: 32px 0 52px;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--indigo) 0%, var(--indigo-soft) 46%, var(--copper) 100%);
}

.page-faq .faq-hero .crumbs {
  margin-bottom: 28px;
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: 32px;
}

.page-faq .faq-hero .eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--teal);
  text-transform: uppercase;
}

.page-faq .faq-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.9rem, 6.2vw, 3.1rem);
  line-height: 1.1;
  letter-spacing: -.01em;
  max-width: 20ch;
}

.page-faq .faq-hero .lede {
  margin: 20px 0 0;
  max-width: 56ch;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--faq-body-text);
}

.page-faq .faq-facts {
  background: var(--indigo);
  color: var(--on-dark);
  padding: 26px 22px 22px;
  border-radius: 3px;
  box-shadow: var(--shadow-2);
  border-top: 2px solid var(--copper);
}

.page-faq .faq-facts-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--on-dark-dim);
}

.page-faq .faq-facts-big {
  margin: 6px 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 3.4rem;
  line-height: 1;
  color: var(--white);
}

.page-faq .faq-facts-big span {
  margin-left: 6px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  color: var(--copper-soft);
}

.page-faq .faq-facts-list {
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--faq-hairline);
}

.page-faq .faq-facts-list > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid var(--faq-hairline);
}

.page-faq .faq-facts-list dt {
  font-size: 13px;
  color: var(--on-dark-dim);
}

.page-faq .faq-facts-list dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13.5px;
  font-variant-numeric: tabular-nums;
  color: var(--on-dark);
}

.page-faq .faq-facts-note {
  margin: 14px 0 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--on-dark-dim);
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-layout {
  padding: 40px 0 72px;
  background: var(--white);
}

.page-faq .faq-layout-grid {
  display: grid;
  gap: 36px;
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-index-label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq .faq-index-list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-index-list > li {
  flex: 0 0 auto;
}

.page-faq .faq-index-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--white);
  color: var(--ink);
  font-size: 13px;
  line-height: 1.3;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color .18s var(--ease), background-color .18s var(--ease), color .18s var(--ease);
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  border-color: var(--copper);
  background: var(--paper);
}

.page-faq .faq-index-no {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--copper);
}

.page-faq .faq-index-count {
  font-family: var(--font-mono);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  color: var(--muted);
}

.page-faq .faq-index-foot {
  margin: 18px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-mail {
  color: var(--teal);
  word-break: break-all;
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 20px;
}

.page-faq .faq-group + .faq-group {
  margin-top: 52px;
}

.page-faq .faq-group-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group-no {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--copper);
  letter-spacing: .04em;
}

.page-faq .faq-group-title {
  flex: 1 1 auto;
  min-width: 0;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.25rem, 4.4vw, 1.6rem);
  line-height: 1.2;
}

.page-faq .faq-group-count {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-variant-numeric: tabular-nums;
  color: var(--muted);
}

/* ---------- 问答手风琴 ---------- */
.page-faq .faq-list {
  margin: 0;
}

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

.page-faq .qa > summary {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: 12px;
  padding: 16px 2px 16px 14px;
  list-style: none;
  cursor: pointer;
  transition: background-color .18s var(--ease);
}

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

.page-faq .qa > summary:hover {
  background: var(--paper);
}

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

.page-faq .qa > summary::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 2px;
  background: var(--copper);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform .2s var(--ease);
}

.page-faq .qa[open] > summary::before {
  transform: scaleY(1);
}

.page-faq .qa-no {
  padding-top: 2px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-variant-numeric: tabular-nums;
  letter-spacing: .04em;
  color: var(--muted);
}

.page-faq .qa-q {
  font-size: 15px;
  font-weight: 500;
  line-height: 1.55;
  color: var(--ink);
}

.page-faq .qa-mark {
  position: relative;
  width: 15px;
  height: 15px;
  margin-top: 4px;
  flex: none;
}

.page-faq .qa-mark::before,
.page-faq .qa-mark::after {
  content: "";
  position: absolute;
  background: var(--copper);
  transition: transform .2s var(--ease);
}

.page-faq .qa-mark::before {
  left: 0;
  top: 6.5px;
  width: 15px;
  height: 2px;
}

.page-faq .qa-mark::after {
  left: 6.5px;
  top: 0;
  width: 2px;
  height: 15px;
}

.page-faq .qa[open] .qa-mark::after {
  transform: scaleY(0);
}

.page-faq .qa-body {
  padding: 0 8px 20px 14px;
}

.page-faq .qa-body p {
  margin: 0;
  max-width: 68ch;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--faq-body-text);
}

.page-faq .qa-next {
  display: inline-block;
  margin: 14px 0 0;
  padding: 7px 12px;
  border-left: 2px solid var(--copper);
  background: var(--paper);
  font-size: 13px;
  line-height: 1.5;
}

.page-faq .qa-next a {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(14, 94, 111, .3);
}

.page-faq .qa-next a:hover,
.page-faq .qa-next a:focus-visible {
  color: var(--copper);
  border-bottom-color: var(--copper);
}

/* ---------- 配图 ---------- */
.page-faq .faq-fig {
  margin: 20px 0 4px;
  padding: 8px;
  border: 1px solid var(--line);
  background: var(--paper);
}

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

.page-faq .faq-fig--wide img {
  aspect-ratio: 3 / 2;
}

.page-faq .faq-fig--std img {
  aspect-ratio: 4 / 3;
}

.page-faq .faq-fig figcaption {
  padding: 9px 4px 2px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 末段求助 ---------- */
.page-faq .faq-help {
  background: var(--indigo-deep);
  color: var(--on-dark);
  padding: 56px 0 64px;
  border-top: 3px solid var(--copper);
}

.page-faq .faq-help-grid {
  display: grid;
  gap: 36px;
}

.page-faq .faq-help-kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--copper-soft);
}

.page-faq .faq-help-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 5vw, 2.2rem);
  line-height: 1.2;
  color: var(--white);
}

.page-faq .faq-help-lede {
  margin: 18px 0 0;
  max-width: 52ch;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--on-dark-dim);
}

.page-faq .faq-help-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px 20px;
  border: 1px solid rgba(233, 238, 246, .38);
  border-radius: 2px;
  background: transparent;
  color: var(--on-dark);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.2;
  text-decoration: none;
  transition: border-color .18s var(--ease), color .18s var(--ease), background-color .18s var(--ease);
}

.page-faq .faq-btn-ghost:hover,
.page-faq .faq-btn-ghost:focus-visible {
  border-color: var(--copper);
  background: rgba(200, 122, 46, .12);
  color: var(--copper-soft);
}

.page-faq .faq-help-side-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--copper-soft);
}

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

.page-faq .faq-prep li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--faq-hairline);
  font-size: 14px;
  line-height: 1.6;
  color: var(--on-dark);
}

.page-faq .faq-prep-no {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-variant-numeric: tabular-nums;
  color: var(--copper-soft);
  padding-top: 2px;
}

.page-faq .faq-help-contact {
  margin: 22px 0 0;
  display: grid;
  gap: 6px;
}

.page-faq .faq-help-contact .faq-mono {
  font-size: 14px;
  color: var(--white);
  word-break: break-all;
}

.page-faq .faq-help-note {
  margin: 14px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--on-dark-dim);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, .82fr);
    align-items: end;
    gap: 40px;
  }

  .page-faq .faq-group-head {
    gap: 16px;
  }

  .page-faq .qa > summary {
    gap: 16px;
    padding: 18px 4px 18px 16px;
  }

  .page-faq .qa-body {
    padding: 0 12px 22px 16px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero {
    padding: 40px 0 64px;
  }

  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: 64px;
  }

  .page-faq .faq-layout {
    padding: 56px 0 88px;
  }

  .page-faq .faq-layout-grid {
    grid-template-columns: 248px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 32px;
    padding-top: 14px;
    border-top: 2px solid var(--ink);
  }

  .page-faq .faq-index-list {
    display: grid;
    gap: 2px;
    padding: 0;
    overflow: visible;
  }

  .page-faq .faq-index-link {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: 10px;
    padding: 11px 10px 11px 12px;
    border: 0;
    border-left: 2px solid var(--line);
    border-radius: 0;
    background: transparent;
    font-size: 14px;
    white-space: normal;
    transition: border-color .18s var(--ease), background-color .18s var(--ease);
  }

  .page-faq .faq-index-link:hover,
  .page-faq .faq-index-link:focus-visible {
    border-left-color: var(--copper);
    background: var(--paper);
  }

  .page-faq .faq-index-foot {
    margin-top: 22px;
  }

  .page-faq .faq-help {
    padding: 72px 0 80px;
  }

  .page-faq .faq-help-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, .92fr);
    gap: 64px;
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa > summary,
  .page-faq .qa > summary::before,
  .page-faq .qa-mark::before,
  .page-faq .qa-mark::after,
  .page-faq .faq-index-link,
  .page-faq .faq-btn-ghost {
    transition: none;
  }
}
<<<END>>>