/* ===== 帮助中心 · 页面作用域 ===== */
.page-faq {
  position: relative;
  overflow-x: clip;
  background:
    linear-gradient(180deg, rgba(34, 107, 102, .05) 0, rgba(244, 239, 230, 0) 300px),
    var(--paper);
  color: var(--ink);
  font-family: var(--sans);
}

/* ---------- 首屏：错位色块 + 索引感 ---------- */
.page-faq .faq-hero {
  position: relative;
  margin-top: 16px;
  padding: 24px 0 30px;
  border-bottom: 2px solid var(--bronze);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -8px;
  inset-inline-end: -18px;
  width: 44%;
  height: 70%;
  background: linear-gradient(155deg, rgba(34, 107, 102, .16), rgba(46, 62, 78, .05));
  clip-path: polygon(24% 0, 100% 0, 100% 100%, 0 70%);
  pointer-events: none;
}

.page-faq .faq-hero__copy {
  position: relative;
}

.page-faq .faq-hero__kicker {
  margin: 0 0 10px;
  font-family: var(--serif);
  font-weight: 600;
  font-size: var(--step-1);
  letter-spacing: .1em;
  color: var(--bronze);
}

.page-faq .faq-hero h1 {
  margin: 0 0 14px;
  font-size: var(--step4);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -.012em;
  max-width: 20ch;
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 46ch;
  font-size: var(--step0);
  line-height: 1.85;
  color: rgba(34, 28, 24, .84);
}

.page-faq .faq-hero__facts {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-faq .faq-hero__facts li {
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 12px;
  align-items: baseline;
  font-size: var(--step-2);
  line-height: 1.6;
  color: var(--slate-deep);
}

.page-faq .faq-hero__facts .mono {
  font-size: var(--step2);
  font-weight: 700;
  color: var(--bronze);
  letter-spacing: .02em;
  text-align: right;
  border-bottom: 2px solid var(--amber-light);
}

.page-faq .faq-hero__figure {
  position: relative;
  margin: 26px 0 0;
}

/* ---------- 主体：左索引 + 右问答带 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding: 28px 0 60px;
}

.page-faq .faq-index {
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-top: 4px solid var(--bronze);
  padding: 14px 14px 16px;
  box-shadow: var(--shadow-slab);
}

.page-faq .faq-index__title {
  margin: 0 0 10px;
  font-family: var(--serif);
  font-weight: 600;
  font-size: var(--step-1);
  letter-spacing: .08em;
  color: var(--bronze-deep);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--rule-soft);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-index__list a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  padding: 9px 8px;
  font-size: var(--step-1);
  color: var(--ink);
  text-decoration: none;
  border-inline-start: 2px solid transparent;
  transition: background-color .16s ease, border-color .16s ease, color .16s ease;
}

.page-faq .faq-index__list .mono {
  font-size: var(--label);
  letter-spacing: .06em;
  color: var(--slate);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  background: var(--wash-amber);
  border-inline-start-color: var(--amber);
  color: var(--bronze-deep);
}

.page-faq .faq-index__list a:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 1px;
}

.page-faq:has(#lookup:target) a[href="#lookup"],
.page-faq:has(#compare:target) a[href="#compare"],
.page-faq:has(#batch:target) a[href="#batch"],
.page-faq:has(#tags:target) a[href="#tags"],
.page-faq:has(#need-more:target) a[href="#need-more"] {
  background: var(--wash-amber);
  border-inline-start-color: var(--amber);
  color: var(--bronze-deep);
}

.page-faq .faq-index__foot {
  margin: 14px 0 0;
  padding-top: 10px;
  border-top: 1px solid var(--rule-soft);
  font-size: var(--step-2);
  line-height: 1.7;
  color: var(--slate-deep);
}

/* ---------- 问答带 ---------- */
.page-faq .faq-band {
  scroll-margin-top: 96px;
  margin-bottom: 42px;
}

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

.page-faq .faq-band__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--bronze);
}

.page-faq .faq-band__num {
  font-size: var(--step2);
  font-weight: 700;
  color: var(--amber);
  letter-spacing: .04em;
}

.page-faq .faq-band__title {
  margin: 0;
  font-size: var(--step3);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--bronze-deep);
}

.page-faq .faq-band__note {
  margin: 10px 0 16px;
  font-family: var(--serif);
  font-weight: 600;
  font-size: var(--step-1);
  line-height: 1.7;
  color: var(--slate-deep);
}

.page-faq .faq-band__list {
  border-top: 1px solid var(--rule-soft);
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--rule-soft);
  background: transparent;
  transition: background-color .18s ease;
}

.page-faq .faq-item:hover {
  background: var(--wash);
}

.page-faq .faq-item__q {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 12px;
  cursor: pointer;
  list-style: none;
  font-size: var(--step1);
  font-weight: 700;
  line-height: 1.6;
  color: var(--ink);
}

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

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: -2px;
}

.page-faq .faq-item__mark {
  flex: none;
  position: relative;
  width: 20px;
  height: 20px;
  margin-top: 2px;
  border: 1px solid var(--slate);
  transition: border-color .16s ease, background-color .16s ease;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--bronze);
  transition: opacity .16s ease, transform .16s ease;
}

.page-faq .faq-item__mark::before {
  width: 8px;
  height: 1.5px;
  transform: translate(-50%, -50%);
}

.page-faq .faq-item__mark::after {
  width: 1.5px;
  height: 8px;
  transform: translate(-50%, -50%);
}

.page-faq .faq-item:hover .faq-item__mark {
  border-color: var(--bronze);
}

.page-faq .faq-item[open] .faq-item__mark {
  border-color: var(--amber);
  background: var(--wash-amber);
}

.page-faq .faq-item[open] .faq-item__mark::after {
  opacity: 0;
  transform: translate(-50%, -50%) scaleY(.2);
}

.page-faq .faq-item__a {
  padding: 0 12px 16px;
  border-top: 1px dashed var(--rule-soft);
  margin-top: 0;
}

.page-faq .faq-item__a p {
  margin: 12px 0 0;
  max-width: 62ch;
  font-size: var(--step0);
  line-height: 1.85;
  color: rgba(34, 28, 24, .86);
}

.page-faq .faq-item__a a {
  color: var(--bronze);
  text-decoration: underline;
  text-decoration-color: var(--amber-light);
  text-underline-offset: 3px;
}

.page-faq .faq-item__a a:hover,
.page-faq .faq-item__a a:focus-visible {
  color: var(--bronze-deep);
  text-decoration-color: var(--amber);
}

.page-faq .faq-level {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 14px 0 0;
  padding: 0;
}

/* ---------- 标签分区：图文并置 ---------- */
.page-faq .faq-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  align-items: start;
}

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

.page-faq .faq-tagpanel {
  margin-top: 26px;
  padding: 16px 14px 18px;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-left: 4px solid var(--amber);
}

.page-faq .faq-tagpanel__hint {
  margin: 0 0 12px;
  font-size: var(--step-2);
  color: var(--slate-deep);
}

.page-faq .faq-taglist {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-faq .faq-taglist__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 12px 0;
  border-top: 1px solid var(--rule-soft);
}

.page-faq .faq-taglist__row[hidden] {
  display: none;
}

.page-faq .faq-taglist__row p {
  margin: 0;
  font-size: var(--step-2);
  line-height: 1.75;
  color: rgba(34, 28, 24, .84);
}

/* ---------- 收束：联系通道 ---------- */
.page-faq .faq-close {
  padding: 22px 18px 20px;
}

.page-faq .faq-close__lead {
  margin: 0;
  max-width: 58ch;
  font-size: var(--step0);
  line-height: 1.85;
}

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

.page-faq .faq-close__lead a:hover,
.page-faq .faq-close__lead a:focus-visible {
  color: #fff;
  text-decoration-color: var(--amber);
}

.page-faq .faq-close__list {
  margin: 20px 0 0;
  display: grid;
  gap: 12px;
  border-top: 1px solid rgba(241, 200, 127, .35);
  padding-top: 16px;
}

.page-faq .faq-close__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3px;
}

.page-faq .faq-close__item dt {
  font-family: var(--serif);
  font-weight: 600;
  font-size: var(--step-2);
  letter-spacing: .08em;
  color: var(--amber-light);
}

.page-faq .faq-close__item dd {
  margin: 0;
  font-size: var(--step0);
  line-height: 1.7;
}

.page-faq .faq-close__item dd.mono {
  letter-spacing: .04em;
}

.page-faq .faq-close__foot {
  margin: 20px 0 0;
  padding-top: 14px;
  border-top: 1px solid rgba(241, 200, 127, .35);
  font-size: var(--step-2);
  line-height: 1.75;
  color: rgba(251, 248, 242, .78);
}

/* ---------- 断点：平板与桌面 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero {
    padding: 32px 0 38px;
  }

  .page-faq .faq-hero h1 {
    font-size: var(--step5);
    max-width: 24ch;
  }

  .page-faq .faq-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
    margin-top: 24px;
  }

  .page-faq .faq-hero__facts li {
    grid-template-columns: 1fr;
    gap: 4px;
    padding-top: 12px;
    border-top: 1px solid var(--rule);
  }

  .page-faq .faq-hero__facts .mono {
    text-align: left;
    border-bottom: 0;
    padding-bottom: 2px;
    border-bottom: 2px solid var(--amber-light);
    justify-self: start;
  }

  .page-faq .faq-item__q {
    padding: 16px 14px;
    font-size: var(--step1);
  }

  .page-faq .faq-item__a {
    padding: 0 14px 18px;
  }

  .page-faq .faq-taglist__row {
    grid-template-columns: 132px minmax(0, 1fr);
    align-items: baseline;
    gap: 14px;
  }

  .page-faq .faq-close__item {
    grid-template-columns: 120px minmax(0, 1fr);
    align-items: baseline;
    gap: 12px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    gap: 44px;
    align-items: end;
  }

  .page-faq .faq-hero__figure {
    margin: 0 0 4px;
  }

  .page-faq .faq-layout {
    grid-template-columns: 212px minmax(0, 1fr);
    gap: 44px;
    padding: 44px 0 96px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 88px;
    align-self: start;
    box-shadow: var(--shadow-slab-strong);
  }

  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    gap: 30px;
  }

  .page-faq .faq-band__title {
    font-size: var(--step4);
  }
}

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