.page-faq {
  --faq-rail-w: 224px;
  --faq-qa-gap: 12px;
  padding-top: var(--header-h);
  background: var(--cream);
  color: var(--ink);
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  margin-top: calc(var(--header-h) * -1);
  padding-top: calc(var(--header-h) + clamp(36px, 5.5vw, 72px));
  padding-bottom: clamp(44px, 6vw, 80px);
  background: linear-gradient(172deg, var(--green-deep) 0%, var(--green) 100%);
  color: var(--cream);
}

.page-faq .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  list-style: none;
  margin: 0 0 clamp(22px, 3.2vw, 34px);
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-faq .breadcrumb-item + .breadcrumb-item {
  margin-left: 10px;
}

.page-faq .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: 10px;
  color: var(--sage);
}

.page-faq .breadcrumb-link,
.page-faq .breadcrumb-current {
  color: var(--copper-light);
  text-decoration: none;
}

.page-faq .breadcrumb-link {
  border-bottom: 1px solid transparent;
  transition: border-color 0.18s var(--ease);
}

.page-faq .breadcrumb-link:hover,
.page-faq .breadcrumb-link:focus-visible {
  border-bottom-color: var(--copper);
}

.page-faq .breadcrumb-current {
  color: var(--paper);
}

.page-faq .faq-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(32px, 5vw, 60px);
}

.page-faq .faq-hero .eyebrow {
  display: block;
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--copper);
}

.page-faq .faq-hero h1 {
  margin: 0 0 clamp(18px, 2.4vw, 26px);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 5.2vw, 62px);
  line-height: 1.14;
  letter-spacing: -0.015em;
  color: var(--cream);
}

.page-faq .faq-hero-lede {
  margin: 0 0 clamp(22px, 3vw, 32px);
  max-width: 54ch;
  font-size: clamp(15.5px, 1.4vw, 18px);
  line-height: 1.85;
  color: var(--paper);
}

.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.page-faq .faq-hero-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 2px solid rgba(227, 192, 138, 0.45);
  align-self: end;
}

.page-faq .faq-hero-step {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 2px 12px;
  padding: 13px 0;
  border-bottom: 1px solid rgba(227, 192, 138, 0.22);
}

.page-faq .faq-hero-step .faq-step-num {
  grid-row: span 2;
  align-self: center;
  font-size: 13px;
  color: var(--copper);
}

.page-faq .faq-hero-step .faq-step-t {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.3;
  color: var(--cream);
}

.page-faq .faq-hero-step .faq-step-d {
  font-size: 13px;
  line-height: 1.6;
  color: rgba(228, 220, 203, 0.74);
}

.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(32px, 4.4vw, 54px) 0 0;
  padding: 0;
  background: rgba(227, 192, 138, 0.28);
  border: 1px solid rgba(227, 192, 138, 0.28);
}

.page-faq .faq-stat {
  background: rgba(12, 36, 29, 0.62);
  padding: 15px 16px;
}

.page-faq .faq-stat dt {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--copper-light);
}

.page-faq .faq-stat dd {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(16px, 1.7vw, 21px);
  color: var(--cream);
}

/* ============ 流程带 ============ */
.page-faq .faq-flow-head {
  max-width: 68ch;
  margin-bottom: clamp(24px, 3.2vw, 38px);
}

.page-faq .faq-flow-title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.1vw, 36px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--green);
}

.page-faq .faq-flow-lede {
  margin: 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink);
}

.page-faq .faq-flow-figure {
  margin: 0;
}

/* ============ 问答主体 ============ */
.page-faq .faq-main {
  padding-top: clamp(48px, 6vw, 84px);
  padding-bottom: clamp(56px, 7vw, 104px);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 52px);
}

.page-faq .faq-rail {
  align-self: start;
  border: var(--rule);
  background: var(--cream);
  box-shadow: var(--shadow-hard-sm);
  padding: 16px;
}

.page-faq .faq-rail-label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--green);
}

.page-faq .faq-rail-scale {
  display: block;
  width: 100%;
  height: 8px;
  margin-bottom: 14px;
}

.page-faq .faq-rail-list {
  display: flex;
  gap: 10px;
  list-style: none;
  margin: 0;
  padding: 2px 0 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-rail-item {
  flex: 0 0 auto;
}

.page-faq .faq-rail-link {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 8px 12px;
  border: 2px solid var(--line);
  background: var(--paper);
  color: var(--green-deep);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

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

.page-faq .faq-rail-node {
  width: 10px;
  height: 10px;
  border: 2px solid var(--line);
  border-radius: 50%;
  background: var(--cream);
  flex: none;
}

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

.page-faq .faq-rail-num {
  font-size: 12px;
  color: var(--copper);
}

.page-faq .faq-rail-text {
  font-size: 14px;
  font-weight: 500;
}

.page-faq .faq-rail-note {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.6;
  color: var(--sage);
}

/* 筛选条 */
.page-faq .faq-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: clamp(28px, 3.6vw, 44px);
  padding-bottom: 14px;
  border-bottom: 2px solid var(--green-deep);
}

.page-faq .faq-toolbar-note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--sage);
}

.page-faq .faq-filter {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 0 14px 0 12px;
  border: 2px solid var(--green-deep);
  background: var(--paper);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--green-deep);
  user-select: none;
}

.page-faq .faq-filter-input {
  appearance: none;
  -webkit-appearance: none;
  position: relative;
  flex: none;
  width: 18px;
  height: 18px;
  margin: 0;
  border: 2px solid var(--green-deep);
  background: var(--cream);
  cursor: pointer;
}

.page-faq .faq-filter-input:checked {
  background: var(--copper);
}

.page-faq .faq-filter-input:checked::after {
  content: "";
  position: absolute;
  inset: 3px;
  background: var(--green-deep);
}

.page-faq .faq-filter-input:focus-visible {
  outline: 2px solid var(--copper);
  outline-offset: 2px;
}

.page-faq:has(.faq-filter-input:checked) .qa-item:not(.is-key) {
  display: none;
}

.page-faq:has(.faq-filter-input:checked) .faq-seg:not(:has(.is-key)) {
  display: none;
}

/* ============ 分段 ============ */
.page-faq .faq-seg {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-seg + .faq-seg {
  margin-top: clamp(64px, 8vw, 108px);
}

.page-faq .faq-seg-head {
  padding-top: 18px;
  border-top: 3px solid var(--green-deep);
  margin-bottom: clamp(22px, 2.8vw, 30px);
}

.page-faq .faq-seg-index {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--copper);
}

.page-faq .faq-seg-title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--green);
}

.page-faq .faq-seg-tip {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.page-faq .faq-seg-foot {
  margin: 22px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--sage);
}

.page-faq .faq-seg-foot a {
  color: var(--green);
  text-decoration: none;
  border-bottom: 1px solid var(--copper);
}

.page-faq .faq-seg-foot a:hover,
.page-faq .faq-seg-foot a:focus-visible {
  border-bottom-width: 2px;
}

/* ============ 问答条 ============ */
.page-faq .qa-list {
  display: grid;
  gap: var(--faq-qa-gap);
}

.page-faq .qa-item {
  border: 2px solid var(--green-deep);
  background: var(--cream);
  transition: box-shadow 0.18s var(--ease);
}

.page-faq .qa-item[open] {
  box-shadow: inset 4px 0 0 var(--copper);
}

.page-faq .qa-summary {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 22px;
  align-items: start;
  gap: 12px;
  min-height: 44px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

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

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

.page-faq .qa-summary:focus-visible {
  outline: 2px solid var(--copper);
  outline-offset: -4px;
}

.page-faq .qa-num {
  padding-top: 3px;
  font-size: 13px;
  text-align: right;
  color: var(--copper);
}

.page-faq .qa-q {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(16px, 1.5vw, 19px);
  line-height: 1.5;
  color: var(--green);
}

.page-faq .qa-q .tag {
  margin-left: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  vertical-align: middle;
  white-space: nowrap;
}

.page-faq .qa-icon {
  position: relative;
  width: 20px;
  height: 20px;
  margin-top: 3px;
}

.page-faq .qa-icon::before,
.page-faq .qa-icon::after {
  content: "";
  position: absolute;
  background: var(--green-deep);
}

.page-faq .qa-icon::before {
  left: 0;
  right: 0;
  top: 9px;
  height: 2px;
}

.page-faq .qa-icon::after {
  top: 0;
  bottom: 0;
  left: 9px;
  width: 2px;
  transition: transform 0.18s var(--ease), opacity 0.18s var(--ease);
}

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

.page-faq .qa-body {
  padding: 0 18px 18px;
}

.page-faq .qa-line {
  margin: 0 0 10px;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--ink);
}

.page-faq .qa-line--basis {
  color: rgba(36, 28, 22, 0.86);
}

.page-faq .qa-key {
  display: inline-block;
  min-width: 3.4em;
  margin-right: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--copper);
  vertical-align: 1px;
}

.page-faq .qa-line--basis .qa-key {
  color: var(--sage);
}

.page-faq .qa-ref {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--sage);
}

.page-faq .qa-ref a {
  color: var(--green);
  text-decoration: none;
  border-bottom: 1px solid var(--copper);
}

.page-faq .qa-ref a:hover,
.page-faq .qa-ref a:focus-visible {
  border-bottom-width: 2px;
}

/* ============ 内联图 ============ */
.page-faq .faq-inline-figure {
  margin: clamp(44px, 5.5vw, 72px) 0 0;
}

/* ============ 收尾 ============ */
.page-faq .faq-ask-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 56px);
}

.page-faq .faq-ask-copy p {
  max-width: 56ch;
}

.page-faq .faq-ask-eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--copper);
}

.page-faq .faq-ask h2 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.1vw, 36px);
  line-height: 1.2;
  color: var(--cream);
}

.page-faq .faq-ask-copy > p {
  margin: 0 0 clamp(22px, 3vw, 30px);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--paper);
}

.page-faq .faq-ask-side-title {
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--copper);
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--copper-light);
}

.page-faq .faq-ask-list {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
}

.page-faq .faq-ask-list li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(201, 187, 164, 0.28);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--paper);
}

.page-faq .faq-ask-list .num {
  font-size: 12.5px;
  color: var(--copper);
  padding-top: 3px;
  text-align: right;
}

.page-faq .faq-ask-contact {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.8;
  color: rgba(228, 220, 203, 0.78);
  word-break: break-word;
}

/* ============ 响应式 ============ */
@media (min-width: 640px) {
  .page-faq .faq-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .qa-body {
    padding-left: 66px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(270px, 0.85fr);
    align-items: end;
  }

  .page-faq .faq-ask-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: clamp(32px, 3.6vw, 56px);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    padding: 18px;
  }

  .page-faq .faq-rail-list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-rail-item {
    flex: none;
  }

  .page-faq .faq-rail-link {
    position: relative;
    display: grid;
    grid-template-columns: 16px 26px minmax(0, 1fr);
    gap: 10px;
    padding: 11px 4px 11px 0;
    border: none;
    background: transparent;
    min-height: 44px;
  }

  .page-faq .faq-rail-link::before {
    content: "";
    position: absolute;
    left: 7px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--line);
  }

  .page-faq .faq-rail-item:first-child .faq-rail-link::before {
    top: 50%;
  }

  .page-faq .faq-rail-item:last-child .faq-rail-link::before {
    bottom: 50%;
  }

  .page-faq .faq-rail-node {
    position: relative;
    z-index: 1;
    width: 16px;
    height: 16px;
    border-width: 2px;
  }

  .page-faq .faq-rail-num {
    text-align: right;
  }

  .page-faq .faq-rail-link:hover,
  .page-faq .faq-rail-link:focus-visible {
    border-color: transparent;
    background: transparent;
  }

  .page-faq .faq-rail-link:hover .faq-rail-text,
  .page-faq .faq-rail-link:focus-visible .faq-rail-text {
    color: var(--copper);
  }

  .page-faq .faq-inline-figure {
    width: min(560px, 74%);
    margin-left: auto;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-rail {
    --faq-rail-w: 240px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-icon::after,
  .page-faq .qa-item,
  .page-faq .faq-rail-link,
  .page-faq .faq-rail-node,
  .page-faq .breadcrumb-link {
    transition: none;
  }
}