.page-faq {
  --faq-index-w: 236px;
  --faq-gap: 44px;
  background: var(--night);
  color: var(--ivory);
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumbs {
  padding-top: calc(var(--header-offset) + 8px);
}

.page-faq .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 13px;
  color: var(--mint);
}

.page-faq .breadcrumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line);
}

.page-faq .breadcrumbs a {
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-faq .breadcrumbs a:hover {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

/* ---------- 通用文字 ---------- */
.page-faq .faq-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--lime);
}

.page-faq .faq-eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--lime), var(--orange));
}

.page-faq .faq-h1 {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-size: clamp(31px, 7.4vw, 58px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -.04em;
  color: var(--ivory);
}

.page-faq .faq-h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(23px, 4.4vw, 34px);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -.028em;
  color: var(--ivory);
}

.page-faq .faq-lede {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mint);
}

.page-faq .mono {
  font-family: var(--font-mono);
}

.page-faq .num {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--lime);
}

/* ---------- 首页横幅 ---------- */
.page-faq .faq-hero {
  padding: 34px 0 60px;
}

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

.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 32px;
}

.page-faq .faq-stat {
  padding: 16px 18px;
  border-radius: var(--r-md);
  background: var(--night-2);
  border: 1px solid var(--line-faint);
}

.page-faq .faq-stat__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(26px, 6vw, 34px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--lime);
}

.page-faq .faq-stat__unit {
  font-size: 12px;
  font-weight: 500;
  color: var(--mint);
  margin-left: 6px;
  letter-spacing: 0;
}

.page-faq .faq-stat__label {
  margin: 10px 0 0;
  font-size: 13px;
  color: var(--mint);
}

.page-faq .faq-hero__media {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line-soft);
}

.page-faq .media-frame {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-faq .media-frame__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 周期表 ---------- */
.page-faq .faq-period {
  position: relative;
  padding: 56px 0 64px;
  background: var(--night-2);
}

.page-faq .faq-period::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--lime) 0%, var(--lime) 24%, var(--orange) 64%, transparent 100%);
}

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

.page-faq .faq-table {
  width: 100%;
  margin-top: 28px;
  border-collapse: collapse;
  font-size: 15px;
}

.page-faq .faq-table__caption {
  caption-side: top;
  text-align: left;
  padding-bottom: 10px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--mint);
}

.page-faq .faq-table th,
.page-faq .faq-table td {
  padding: 14px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line-faint);
}

.page-faq .faq-table thead th {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--mint);
  border-bottom-color: var(--line);
  white-space: nowrap;
}

.page-faq .faq-table tbody th {
  font-weight: 600;
  color: var(--ivory);
}

.page-faq .faq-table tbody td {
  color: var(--mint);
}

.page-faq .faq-table tbody tr {
  transition: background .18s var(--ease);
}

.page-faq .faq-table tbody tr:hover {
  background: rgba(198, 255, 61, .07);
}

.page-faq .faq-table td.dur {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--lime);
  white-space: nowrap;
}

.page-faq .faq-period__media {
  margin: 0 0 20px;
  border: 1px solid var(--line-soft);
}

.page-faq .faq-checklist {
  padding: 22px 22px 10px;
  border-radius: var(--r-lg);
  background: var(--panel);
  border: 1px solid var(--line-soft);
}

.page-faq .faq-checklist__title {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--lime);
}

.page-faq .faq-checklist ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-checklist li {
  position: relative;
  padding: 11px 0 11px 24px;
  border-bottom: 1px dashed var(--line-faint);
  font-size: 15px;
  line-height: 1.6;
  color: var(--ivory);
}

.page-faq .faq-checklist li:last-child {
  border-bottom: none;
}

.page-faq .faq-checklist li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 19px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 3px rgba(198, 255, 61, .16);
}

/* ---------- 问答工作台 ---------- */
.page-faq .faq-workbench {
  padding: 64px 0 20px;
}

.page-faq .faq-workbench__head {
  max-width: 70ch;
}

.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.page-faq .filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line-soft);
  background: transparent;
  color: var(--mint);
  font: inherit;
  font-size: 14px;
  cursor: pointer;
  transition: color .18s var(--ease), background .18s var(--ease), border-color .18s var(--ease);
}

.page-faq .filter-btn:hover {
  color: var(--lime-soft);
  border-color: var(--line);
}

.page-faq .filter-btn[aria-pressed="true"] {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--night);
  font-weight: 700;
}

.page-faq .filter-count {
  font-family: var(--font-mono);
  font-size: 12px;
  opacity: .78;
}

.page-faq .faq-workbench__body {
  display: grid;
  gap: 30px;
  margin-top: 32px;
}

.page-faq .faq-index {
  padding: 20px;
  border-radius: var(--r-lg);
  background: var(--panel-deep);
  border: 1px solid var(--line-soft);
}

.page-faq .faq-index__title {
  margin: 0 0 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--mint);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 4px;
}

.page-faq .faq-index a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 12px;
  border-radius: var(--r-sm);
  font-size: 14px;
  line-height: 1.5;
  color: var(--mint);
  text-decoration: none;
  transition: color .18s var(--ease), background .18s var(--ease);
}

.page-faq .faq-index a .mono {
  font-size: 11px;
  opacity: .8;
  flex: none;
}

.page-faq .faq-index a:hover {
  color: var(--lime-soft);
  background: rgba(198, 255, 61, .08);
}

.page-faq .faq-index a[aria-current] {
  background: var(--lime);
  color: var(--night);
  font-weight: 700;
}

.page-faq .faq-index a[aria-current] .mono {
  opacity: .72;
}

/* ---------- 问答组 ---------- */
.page-faq .qa-group + .qa-group {
  margin-top: 44px;
}

.page-faq .qa-group__title {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: clamp(19px, 3.6vw, 25px);
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--ivory);
}

.page-faq .qa-group__title::before {
  content: "";
  flex: none;
  width: 22px;
  height: 3px;
  border-radius: 2px;
  background: var(--orange);
}

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

.page-faq .qa-item[data-filtered-out] {
  display: none;
}

.page-faq .qa-item details {
  border-left: 3px solid transparent;
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  transition: border-color .2s var(--ease), background .2s var(--ease);
}

.page-faq .qa-item details[open] {
  border-left-color: var(--lime);
  background: rgba(198, 255, 61, .05);
}

.page-faq .qa-item summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 18px 14px 18px 16px;
  list-style: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ivory);
  transition: color .18s var(--ease);
}

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

.page-faq .qa-item summary::marker {
  content: "";
}

.page-faq .qa-item summary:hover {
  color: var(--lime-soft);
}

.page-faq .qa-item__num {
  flex: none;
  margin-top: 2px;
  padding: 2px 8px;
  border-radius: var(--r-pill);
  background: rgba(198, 255, 61, .14);
  color: var(--lime);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .04em;
}

.page-faq .qa-item__q {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .qa-item__icon {
  position: relative;
  flex: none;
  width: 22px;
  height: 22px;
  margin-top: 2px;
  border-radius: 50%;
  border: 1px solid var(--line);
  transition: background .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .qa-item__icon::before,
.page-faq .qa-item__icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: var(--lime);
  transition: opacity .2s var(--ease), background .2s var(--ease);
}

.page-faq .qa-item__icon::before {
  width: 10px;
  height: 2px;
}

.page-faq .qa-item__icon::after {
  width: 2px;
  height: 10px;
}

.page-faq .qa-item details[open] .qa-item__icon {
  background: var(--lime);
  border-color: var(--lime);
}

.page-faq .qa-item details[open] .qa-item__icon::before,
.page-faq .qa-item details[open] .qa-item__icon::after {
  background: var(--night);
}

.page-faq .qa-item details[open] .qa-item__icon::after {
  opacity: 0;
}

.page-faq .qa-item__a {
  padding: 0 16px 22px 50px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mint);
}

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

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

.page-faq .qa-item__a strong {
  color: var(--ivory);
  font-weight: 700;
}

.page-faq .qa-item__a a {
  color: var(--lime-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(198, 255, 61, .45);
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-faq .qa-item__a a:hover {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

/* ---------- 联系客服 ---------- */
.page-faq .faq-help {
  padding: 56px 0 80px;
}

.page-faq .faq-help__panel {
  position: relative;
  overflow: hidden;
  padding: 32px 22px 34px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line-soft);
  background: linear-gradient(140deg, var(--panel) 0%, var(--night-2) 60%, var(--panel-deep) 100%);
}

.page-faq .faq-help__panel::after {
  content: "";
  position: absolute;
  right: -90px;
  top: -110px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(198, 255, 61, .22), transparent 68%);
  pointer-events: none;
}

.page-faq .faq-help__mail {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin: 24px 0 20px;
}

.page-faq .faq-help__mail a {
  font-family: var(--font-mono);
  font-size: clamp(14px, 3.8vw, 21px);
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--lime);
  text-decoration: none;
  word-break: break-all;
  padding-bottom: 3px;
  border-bottom: 1px dashed rgba(198, 255, 61, .45);
  transition: color .18s var(--ease);
}

.page-faq .faq-help__mail a:hover {
  color: var(--lime-soft);
}

.page-faq .copy-btn {
  padding: 8px 15px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line-soft);
  background: transparent;
  color: var(--mint);
  font: inherit;
  font-size: 13px;
  cursor: pointer;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-faq .copy-btn:hover {
  color: var(--lime-soft);
  border-color: var(--line);
}

.page-faq .copy-btn[data-copied] {
  color: var(--lime);
  border-color: var(--lime);
}

.page-faq .faq-help__tips {
  position: relative;
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
  display: grid;
  gap: 10px;
  max-width: 60ch;
}

.page-faq .faq-help__tips li {
  display: flex;
  gap: 10px;
  font-size: 15px;
  line-height: 1.65;
  color: var(--mint);
}

.page-faq .faq-help__tips li::before {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  margin-top: 10px;
  border-radius: 50%;
  background: var(--orange);
}

.page-faq .faq-help__panel .btn {
  position: relative;
}

/* ---------- 平板 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-hero__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-help__panel {
    padding: 40px 38px 42px;
  }

  .page-faq .faq-table th,
  .page-faq .faq-table td {
    padding: 15px 18px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: 44px 0 76px;
  }

  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    align-items: center;
    gap: 56px;
  }

  .page-faq .faq-period {
    padding: 72px 0 82px;
  }

  .page-faq .faq-period__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, .5fr);
    align-items: start;
    gap: 48px;
  }

  .page-faq .faq-workbench {
    padding: 84px 0 24px;
  }

  .page-faq .faq-workbench__body {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: var(--faq-gap);
    align-items: start;
    margin-top: 40px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 104px;
  }

  .page-faq .qa-item__a {
    padding-left: 56px;
    padding-right: 24px;
  }

  .page-faq .faq-help {
    padding: 64px 0 100px;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-hero__stats {
    gap: 14px;
  }

  .page-faq .faq-checklist {
    padding: 26px 26px 12px;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-item details,
  .page-faq .qa-item__icon,
  .page-faq .qa-item__icon::before,
  .page-faq .qa-item__icon::after,
  .page-faq .filter-btn,
  .page-faq .faq-table tbody tr {
    transition: none;
  }
}
<<<END>>>