.page-faq {
  --faq-rail-w: 236px;
  --faq-col-gap: clamp(30px, 5vw, 72px);
  --faq-panel-bg: linear-gradient(180deg, rgba(30, 26, 20, .92), rgba(18, 16, 12, .78));
  padding-top: clamp(92px, 12vw, 136px);
  padding-bottom: clamp(56px, 8vw, 108px);
}

.page-faq .faq-crumb-row {
  margin-bottom: clamp(18px, 3vw, 30px);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  padding-top: 0;
}

.page-faq .faq-hero-frame {
  padding: clamp(26px, 4.2vw, 58px) clamp(20px, 3.6vw, 54px);
  background:
    radial-gradient(115% 135% at 90% 4%, rgba(198, 160, 70, .15), transparent 58%),
    linear-gradient(158deg, rgba(30, 26, 20, .94), rgba(18, 16, 12, .97));
}

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

.page-faq .faq-hero h1 {
  margin: 16px 0 18px;
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: clamp(32px, 5.4vw, 62px);
  line-height: 1.16;
  letter-spacing: .01em;
  color: var(--paper);
}

.page-faq .faq-hero .lede {
  max-width: 46ch;
}

.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

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

.page-faq .faq-hero-facts li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 14px;
  padding: 14px 0 14px 16px;
  border-left: 1px solid var(--hair);
}

.page-faq .faq-hero-facts .index-num {
  color: var(--gold);
  padding-top: 3px;
}

.page-faq .faq-hero-facts strong {
  display: block;
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 17px;
  color: var(--paper);
  letter-spacing: .01em;
}

.page-faq .faq-hero-facts p {
  margin: 5px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--text-dim);
}

/* ---------- 主体双栏 ---------- */

.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-col-gap);
  align-items: start;
  margin-top: clamp(48px, 7vw, 84px);
}

.page-faq .faq-rail-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--text-soft);
}

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

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

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

.page-faq .faq-rail-list a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 15px;
  border: 1px solid var(--hair);
  background: rgba(30, 26, 20, .62);
  color: var(--text-dim);
  font-size: 13.5px;
  white-space: nowrap;
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-rail-list a:hover {
  color: var(--gold-hi);
  border-color: var(--gold);
}

.page-faq .faq-rail-list .index-num {
  color: var(--copper);
  font-size: 11.5px;
}

/* ---------- 区块公共 ---------- */

.page-faq .faq-sec {
  scroll-margin-top: 108px;
}

.page-faq .faq-sec .section-head {
  margin-bottom: clamp(24px, 3.4vw, 40px);
}

.page-faq .faq-sec h2 {
  font-family: var(--font-serif);
  font-weight: 300;
  font-size: clamp(26px, 3.4vw, 40px);
  line-height: 1.25;
  color: var(--paper);
  margin: 12px 0 14px;
}

.page-faq .faq-figure {
  margin: 0 0 clamp(28px, 4vw, 46px);
  border: 1px solid var(--hair-soft);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.9) contrast(1.02);
}

.page-faq .faq-figure--compare {
  margin-top: clamp(26px, 3.6vw, 44px);
  margin-bottom: 0;
}

/* ---------- 五步定位法 ---------- */

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

.page-faq .faq-step-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-faq .faq-step-rail {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, minmax(120px, 1fr));
  gap: 8px;
  padding-top: 24px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq .faq-step-rail::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-step-rail::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 6%;
  right: 6%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line), var(--hair), var(--line), transparent);
}

.page-faq .faq-step-node {
  position: relative;
  display: grid;
  gap: 6px;
  padding: 14px 12px 16px;
  cursor: pointer;
  border: 1px solid var(--hair-soft);
  background: linear-gradient(180deg, rgba(30, 26, 20, .86), rgba(18, 16, 12, .6));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-step-node::before {
  content: "";
  position: absolute;
  top: -19px;
  left: 50%;
  width: 11px;
  height: 11px;
  margin-left: -5.5px;
  transform: rotate(45deg);
  background: var(--ink);
  border: 1px solid var(--line);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-faq .faq-step-node:hover {
  border-color: var(--copper);
}

.page-faq .faq-step-num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--copper);
}

.page-faq .faq-step-name {
  font-family: var(--font-serif);
  font-size: 15.5px;
  line-height: 1.35;
  color: var(--paper);
}

.page-faq #faq-r1:checked ~ .faq-step-rail .faq-step-node[for="faq-r1"],
.page-faq #faq-r2:checked ~ .faq-step-rail .faq-step-node[for="faq-r2"],
.page-faq #faq-r3:checked ~ .faq-step-rail .faq-step-node[for="faq-r3"],
.page-faq #faq-r4:checked ~ .faq-step-rail .faq-step-node[for="faq-r4"],
.page-faq #faq-r5:checked ~ .faq-step-rail .faq-step-node[for="faq-r5"] {
  border-color: var(--gold);
  background: linear-gradient(180deg, rgba(198, 160, 70, .17), rgba(30, 26, 20, .9));
  transform: translateY(-3px);
}

.page-faq #faq-r1:checked ~ .faq-step-rail .faq-step-node[for="faq-r1"]::before,
.page-faq #faq-r2:checked ~ .faq-step-rail .faq-step-node[for="faq-r2"]::before,
.page-faq #faq-r3:checked ~ .faq-step-rail .faq-step-node[for="faq-r3"]::before,
.page-faq #faq-r4:checked ~ .faq-step-rail .faq-step-node[for="faq-r4"]::before,
.page-faq #faq-r5:checked ~ .faq-step-rail .faq-step-node[for="faq-r5"]::before {
  background: var(--gold-hi);
  border-color: var(--gold-hi);
  box-shadow: 0 0 0 5px rgba(242, 212, 136, .14);
}

.page-faq #faq-r1:checked ~ .faq-step-rail .faq-step-node[for="faq-r1"] .faq-step-num,
.page-faq #faq-r2:checked ~ .faq-step-rail .faq-step-node[for="faq-r2"] .faq-step-num,
.page-faq #faq-r3:checked ~ .faq-step-rail .faq-step-node[for="faq-r3"] .faq-step-num,
.page-faq #faq-r4:checked ~ .faq-step-rail .faq-step-node[for="faq-r4"] .faq-step-num,
.page-faq #faq-r5:checked ~ .faq-step-rail .faq-step-node[for="faq-r5"] .faq-step-num {
  color: var(--gold-hi);
}

.page-faq .faq-step-panels {
  margin-top: clamp(20px, 3vw, 32px);
}

.page-faq .faq-step-panel {
  display: none;
  padding: clamp(22px, 3.4vw, 40px);
  border-top: 2px solid var(--gold);
  background: var(--faq-panel-bg);
}

.page-faq #faq-r1:checked ~ .faq-step-panels > .faq-step-panel[data-step="1"],
.page-faq #faq-r2:checked ~ .faq-step-panels > .faq-step-panel[data-step="2"],
.page-faq #faq-r3:checked ~ .faq-step-panels > .faq-step-panel[data-step="3"],
.page-faq #faq-r4:checked ~ .faq-step-panels > .faq-step-panel[data-step="4"],
.page-faq #faq-r5:checked ~ .faq-step-panels > .faq-step-panel[data-step="5"] {
  display: block;
  animation: faqStepIn 380ms var(--ease) both;
}

@keyframes faqStepIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.page-faq .faq-step-heading {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
  margin: 0 0 clamp(18px, 2.4vw, 26px);
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(19px, 2.3vw, 25px);
  color: var(--paper);
}

.page-faq .faq-step-heading .index-num {
  color: var(--gold);
  font-size: 13px;
}

.page-faq .faq-step-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--hair-soft);
  border: 1px solid var(--hair-soft);
}

.page-faq .faq-step-cell {
  padding: clamp(16px, 2.2vw, 24px);
  background: rgba(18, 16, 12, .72);
}

.page-faq .faq-cell-label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--copper);
}

.page-faq .faq-cell-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
}

.page-faq .faq-step-cell--hint .faq-cell-label {
  color: var(--gold);
}

.page-faq .faq-step-cell--hint {
  background: rgba(58, 46, 28, .3);
}

/* ---------- 端别差异 ---------- */

.page-faq .faq-compare {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border: 1px solid var(--hair);
  background: linear-gradient(155deg, rgba(30, 26, 20, .92), rgba(18, 16, 12, .86));
}

.page-faq .faq-compare-split {
  height: 1px;
  background-image: repeating-linear-gradient(90deg, var(--hair) 0 1px, transparent 1px 9px);
}

.page-faq .faq-compare-col {
  padding: clamp(22px, 3.2vw, 38px);
}

.page-faq .faq-compare-label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .2em;
  color: var(--copper);
}

.page-faq .faq-compare-col--desktop .faq-compare-label {
  color: var(--gold);
}

.page-faq .faq-compare-col h3 {
  margin: 0 0 4px;
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(19px, 2.2vw, 24px);
  color: var(--paper);
}

.page-faq .faq-compare-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 13px;
}

.page-faq .faq-compare-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text);
}

.page-faq .faq-compare-list li::before {
  content: "";
  width: 7px;
  height: 7px;
  margin-top: 9px;
  transform: rotate(45deg);
  background: var(--copper);
}

.page-faq .faq-compare-col--desktop .faq-compare-list li::before {
  background: var(--gold);
}

/* ---------- 常见问答 ---------- */

.page-faq .faq-group-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 clamp(22px, 3vw, 34px);
}

.page-faq .faq-group-nav a {
  padding: 8px 15px;
  border: 1px solid var(--hair);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--text-dim);
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-group-nav a:hover {
  color: var(--gold-hi);
  border-color: var(--gold);
  background: rgba(198, 160, 70, .06);
}

.page-faq .faq-group {
  margin-top: clamp(28px, 4vw, 44px);
  scroll-margin-top: 108px;
}

.page-faq .faq-group:first-of-type {
  margin-top: 0;
}

.page-faq .faq-group-title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 4px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--hair-soft);
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(19px, 2.2vw, 24px);
  color: var(--paper);
}

.page-faq .faq-group-title .index-num {
  color: var(--gold);
  font-size: 12.5px;
}

.page-faq .faq-qa .accordion-item {
  border-bottom: 1px solid var(--hair-soft);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-qa .accordion-item[open] {
  border-bottom-color: var(--gold);
  background: rgba(198, 160, 70, .05);
}

.page-faq .faq-qa .accordion-trigger {
  position: relative;
  padding: 17px 46px 17px 4px;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  line-height: 1.65;
  color: var(--paper);
  transition: color var(--dur) var(--ease);
}

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

.page-faq .faq-qa .accordion-trigger::after {
  content: "";
  position: absolute;
  right: 10px;
  top: 50%;
  width: 8px;
  height: 8px;
  margin-top: -6px;
  border-right: 1px solid var(--gold);
  border-bottom: 1px solid var(--gold);
  transform: rotate(45deg);
  transition: transform var(--dur) var(--ease), margin-top var(--dur) var(--ease);
}

.page-faq .faq-qa .accordion-item[open] .accordion-trigger::after {
  transform: rotate(-135deg);
  margin-top: -1px;
}

.page-faq .faq-qa .accordion-trigger:hover {
  color: var(--gold-hi);
}

.page-faq .faq-qa .accordion-panel {
  padding: 0 46px 22px 4px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-faq .faq-qa .accordion-panel p {
  margin: 0;
}

/* ---------- 说法对照 ---------- */

.page-faq .faq-terms {
  margin: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--hair-soft);
  border: 1px solid var(--hair);
}

.page-faq .faq-term {
  position: relative;
  padding: clamp(18px, 2.4vw, 26px) clamp(18px, 2.4vw, 26px);
  background: var(--ink);
  transition: background var(--dur) var(--ease);
}

.page-faq .faq-term:hover {
  background: rgba(30, 26, 20, .95);
}

.page-faq .faq-term dt {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-right: 110px;
  margin-bottom: 9px;
  font-family: var(--font-serif);
  font-size: 16.5px;
  color: var(--gold);
}

.page-faq .faq-term dt .index-num {
  font-size: 11.5px;
  color: var(--copper);
}

.page-faq .faq-term dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text-dim);
}

.page-faq .faq-term[data-hint]::after {
  content: attr(data-hint);
  position: absolute;
  top: clamp(18px, 2.4vw, 26px);
  right: clamp(18px, 2.4vw, 26px);
  max-width: 130px;
  text-align: right;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.5;
  letter-spacing: .04em;
  color: var(--gold-hi);
  opacity: 0;
  transform: translateY(-4px);
  pointer-events: none;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-term[data-hint]:hover::after,
.page-faq .faq-term[data-hint]:focus-within::after {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 延伸阅读 ---------- */

.page-faq .faq-next {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-faq .faq-next-card {
  display: grid;
  gap: 8px;
  padding: clamp(20px, 2.8vw, 28px);
  border: 1px solid var(--hair);
  background: linear-gradient(180deg, rgba(30, 26, 20, .88), rgba(18, 16, 12, .72));
  color: inherit;
  text-decoration: none;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-next-card:hover {
  transform: translateY(-3px);
  border-color: var(--gold);
}

.page-faq .faq-next-card .index-num {
  color: var(--copper);
  font-size: 11.5px;
}

.page-faq .faq-next-card strong {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 19px;
  color: var(--paper);
}

.page-faq .faq-next-text {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-faq .faq-next-go {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--gold);
}

.page-faq .faq-next-card:hover .faq-next-go {
  color: var(--gold-hi);
}

/* ---------- 断点 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-step-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-faq .faq-step-cell--hint {
    grid-column: 1 / -1;
  }
  .page-faq .faq-compare {
    grid-template-columns: minmax(0, 1fr) 1px minmax(0, 1fr);
  }
  .page-faq .faq-compare-split {
    height: auto;
    background-image: repeating-linear-gradient(135deg, var(--hair) 0 1px, transparent 1px 10px);
  }
  .page-faq .faq-terms {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-faq .faq-next {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(240px, .9fr);
    align-items: end;
  }
  .page-faq .faq-hero-facts {
    align-self: end;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
  }
  .page-faq .faq-rail {
    position: sticky;
    top: 96px;
  }
  .page-faq .faq-rail-list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    border-left: 1px solid var(--hair-soft);
    padding-bottom: 0;
  }
  .page-faq .faq-rail-list a {
    display: flex;
    width: 100%;
    padding: 10px 8px 10px 14px;
    border: 1px solid transparent;
    border-left-width: 2px;
    background: transparent;
    transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
  }
  .page-faq .faq-rail-list a:hover {
    background: rgba(198, 160, 70, .07);
    border-left-color: var(--gold);
  }
  .page-faq .faq-step-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-faq .faq-step-cell--hint {
    grid-column: auto;
  }
  .page-faq .faq-next {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 719px) {
  .page-faq .faq-step-rail::before {
    display: none;
  }
  .page-faq .faq-step-node::before {
    top: -14px;
    width: 9px;
    height: 9px;
    margin-left: -4.5px;
  }
  .page-faq .faq-step-rail {
    padding-top: 18px;
  }
  .page-faq .faq-term dt {
    padding-right: 0;
  }
  .page-faq .faq-term[data-hint]::after {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-step-panel,
  .page-faq .faq-step-node,
  .page-faq .faq-next-card,
  .page-faq .faq-qa .accordion-trigger::after {
    animation: none !important;
    transition: none !important;
    transform: none !important;
  }
}