.page-faq {
  --faq-rule: rgba(216, 224, 220, .14);
  --faq-wire: rgba(216, 224, 220, .28);
  --faq-paper-ink: #26362F;
  --faq-paper-soft: #4A5C54;
  display: block;
}

.page-faq .faq-wrap {
  width: 100%;
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 0 var(--gutter) clamp(48px, 6vw, 96px);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: clamp(24px, 3.6vw, 48px) 0 clamp(20px, 2.8vw, 34px);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg,
    var(--c-lime) 0,
    var(--c-lime) 14%,
    var(--c-orange) 14%,
    var(--c-orange) 26%,
    rgba(216, 224, 220, .18) 26%,
    rgba(216, 224, 220, .18) 100%);
}

.page-faq .breadcrumb {
  margin-bottom: clamp(18px, 2.4vw, 28px);
}

.page-faq .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .breadcrumb li {
  display: inline-flex;
  align-items: center;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--c-steel-mid);
}

.page-faq .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--c-steel-mid);
}

.page-faq .breadcrumb a {
  color: var(--c-steel);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--c-lime);
  border-bottom-color: var(--c-lime);
}

.page-faq h1 {
  font-family: var(--f-display);
  font-size: var(--fs-h1);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: .01em;
  color: var(--c-paper);
  margin: 0 0 clamp(14px, 1.8vw, 22px);
  max-width: 16em;
}

.page-faq .faq-lead {
  margin: 0;
  max-width: 36em;
  font-family: var(--f-body);
  font-size: var(--fs-body);
  line-height: 1.78;
  color: var(--c-steel);
}

/* ---------- 场景标签 ---------- */

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

.page-faq .faq-tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  font-family: var(--f-body);
  font-size: 14px;
  line-height: 1;
  color: var(--c-green);
  background: var(--c-paper-card);
  border: 1px solid var(--c-wire);
  border-radius: 2px;
  text-decoration: none;
  box-shadow: 2px 2px 0 rgba(216, 224, 220, .12);
  transition: background-color var(--dur) var(--ease),
              color var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              transform var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
}

.page-faq .faq-tab:hover,
.page-faq .faq-tab:focus-visible {
  background: transparent;
  color: var(--c-lime);
  border-color: var(--c-lime);
  transform: translate(1px, 1px);
  box-shadow: 1px 1px 0 rgba(183, 255, 60, .28);
}

.page-faq .faq-tab-num {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--c-lime-mid);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-tab:hover .faq-tab-num,
.page-faq .faq-tab:focus-visible .faq-tab-num {
  color: var(--c-orange);
}

/* ---------- 分组骨架 ---------- */

.page-faq .faq-group {
  padding: clamp(34px, 4.6vw, 64px) 0;
  border-top: 1px solid var(--faq-rule);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-group--first {
  border-top: 0;
  padding-top: clamp(26px, 3.4vw, 44px);
}

.page-faq .faq-group-head {
  margin-bottom: clamp(20px, 2.6vw, 32px);
}

.page-faq .faq-group-head .eyebrow {
  display: block;
  margin: 0 0 8px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--c-steel-mid);
}

.page-faq .faq-group-head h2 {
  margin: 0 0 10px;
  font-family: var(--f-display);
  font-size: var(--fs-h2);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: .01em;
  color: var(--c-paper);
}

.page-faq .faq-group-lead {
  margin: 0;
  max-width: 40em;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--c-steel);
}

/* ---------- 更新表 ---------- */

.page-faq .faq-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--faq-wire);
  border-radius: 2px;
  background: var(--c-panel);
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-family: var(--f-body);
  font-size: 15px;
}

.page-faq .faq-table thead th {
  padding: 12px 16px;
  font-family: var(--f-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: .14em;
  text-transform: uppercase;
  text-align: left;
  color: var(--c-steel-mid);
  border-bottom: 1px solid var(--faq-wire);
  white-space: nowrap;
}

.page-faq .faq-table tbody th {
  padding: 15px 16px;
  text-align: left;
  font-weight: 600;
  color: var(--c-paper);
  border-bottom: 1px solid var(--faq-rule);
  white-space: nowrap;
}

.page-faq .faq-table tbody td {
  padding: 15px 16px;
  line-height: 1.62;
  color: var(--c-steel);
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-table tbody td.faq-td-time {
  font-family: var(--f-mono);
  font-size: 14px;
  color: var(--c-lime);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.page-faq .faq-table tbody tr:last-child th,
.page-faq .faq-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-faq .faq-table tbody tr:hover th,
.page-faq .faq-table tbody tr:hover td {
  background: rgba(183, 255, 60, .05);
}

/* ---------- 折叠问答 ---------- */

.page-faq .faq-list {
  display: grid;
  gap: 10px;
}

.page-faq .faq-list--spaced {
  margin-top: clamp(20px, 2.6vw, 30px);
}

.page-faq .faq-item {
  border: 1px solid var(--faq-wire);
  border-radius: 2px;
  background: var(--c-panel);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-item:hover {
  border-color: rgba(183, 255, 60, .38);
}

.page-faq .faq-item[open] {
  background: #0F1E1A;
  border-color: rgba(183, 255, 60, .5);
}

.page-faq .faq-item > summary {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 16px;
  gap: 10px;
  align-items: center;
  min-height: 56px;
  padding: 15px 14px;
  cursor: pointer;
  list-style: none;
}

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

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

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

.page-faq .faq-idx {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--c-steel-mid);
  font-variant-numeric: tabular-nums;
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-item[open] .faq-idx {
  color: var(--c-lime);
}

.page-faq .faq-q {
  font-size: 15.5px;
  font-weight: 500;
  line-height: 1.5;
  color: var(--c-paper);
}

.page-faq .faq-toggle {
  position: relative;
  justify-self: end;
  width: 14px;
  height: 14px;
}

.page-faq .faq-toggle::before,
.page-faq .faq-toggle::after {
  content: "";
  position: absolute;
  background: var(--c-steel);
  transition: transform var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-toggle::before {
  top: 6px;
  left: 0;
  width: 14px;
  height: 2px;
}

.page-faq .faq-toggle::after {
  top: 0;
  left: 6px;
  width: 2px;
  height: 14px;
}

.page-faq .faq-item[open] .faq-toggle::before {
  background: var(--c-orange);
}

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

.page-faq .faq-a {
  padding: 14px 28px 20px 44px;
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-a p {
  margin: 0;
  max-width: 42em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--c-steel);
}

/* ---------- 图表与图片 ---------- */

.page-faq .faq-figure {
  margin: 0;
  padding: clamp(16px, 2vw, 24px);
  border: 1px solid var(--faq-wire);
  border-radius: 2px;
  background: var(--c-panel);
}

.page-faq .faq-timeline {
  display: block;
  width: 100%;
  max-width: 760px;
  height: auto;
  margin: 0 auto;
}

.page-faq .tl-rule {
  stroke: var(--faq-wire);
  stroke-width: 1;
}

.page-faq .tl-bar {
  fill: rgba(157, 178, 191, .16);
  stroke: var(--faq-wire);
  stroke-width: 1;
}

.page-faq .tl-bar--stoppage {
  fill: rgba(255, 106, 43, .22);
  stroke: var(--c-orange);
}

.page-faq .tl-label {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .06em;
  fill: var(--c-steel);
}

.page-faq .tl-label--stoppage {
  fill: var(--c-orange);
}

.page-faq .faq-figure .media {
  border-radius: 2px;
}

.page-faq .faq-figure .media-caption {
  margin-top: 12px;
}

/* ---------- 纸层区块 ---------- */

.page-faq .faq-group--paper {
  margin: clamp(22px, 3vw, 38px) 0;
  padding: clamp(22px, 3.2vw, 44px);
  border: 1px solid var(--c-wire);
  border-radius: 2px;
  background: var(--c-paper-card);
  box-shadow: 4px 5px 0 rgba(8, 17, 15, .5);
}

.page-faq .faq-group--paper h2 {
  color: var(--c-green);
}

.page-faq .faq-group--paper .faq-group-head .eyebrow {
  color: var(--faq-paper-soft);
}

.page-faq .faq-group--paper .faq-group-lead {
  color: var(--faq-paper-ink);
}

.page-faq .faq-quote {
  margin: 0 0 clamp(18px, 2.4vw, 26px);
  padding: 13px 16px;
  border-left: 3px solid var(--c-orange);
  border-radius: 2px;
  background: rgba(14, 26, 23, .07);
  font-family: var(--f-mono);
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-green);
  word-break: break-word;
}

.page-faq .faq-cite-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: rgba(14, 26, 23, .14);
  border: 1px solid rgba(14, 26, 23, .14);
  border-radius: 2px;
  overflow: hidden;
}

.page-faq .faq-cite-cell {
  padding: 16px 18px;
  background: var(--c-paper-card);
}

.page-faq .faq-cite-cell h3 {
  margin: 0 0 8px;
  font-family: var(--f-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--c-green);
}

.page-faq .faq-cite-cell p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--faq-paper-ink);
}

.page-faq .faq-note--paper {
  color: var(--faq-paper-soft);
}

/* ---------- 联系 ---------- */

.page-faq .faq-contact {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--faq-rule);
  border: 1px solid var(--faq-wire);
  border-radius: 2px;
  overflow: hidden;
}

.page-faq .faq-contact li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 15px 16px;
  background: var(--c-panel);
}

.page-faq .faq-contact-key {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--c-steel-mid);
}

.page-faq .faq-contact-val {
  font-size: 15px;
  line-height: 1.6;
  color: var(--c-paper);
  word-break: break-word;
}

/* ---------- 说明文字 ---------- */

.page-faq .faq-note {
  margin: 16px 0 0;
  max-width: 46em;
  font-size: 14px;
  line-height: 1.72;
  color: var(--c-steel);
}

.page-faq .faq-note a {
  color: var(--c-lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(183, 255, 60, .5);
  transition: border-color var(--dur) var(--ease);
}

.page-faq .faq-note a:hover,
.page-faq .faq-note a:focus-visible {
  border-bottom-color: var(--c-lime);
}

/* ---------- 响应式 ---------- */

@media (max-width: 640px) {
  .page-faq .faq-tab {
    font-size: 13px;
    padding: 8px 12px;
  }

  .page-faq .faq-item > summary {
    grid-template-columns: 30px minmax(0, 1fr) 16px;
    gap: 8px;
    padding: 14px 12px;
  }

  .page-faq .faq-a {
    padding: 12px 12px 18px 42px;
  }

  .page-faq .faq-figure {
    padding: 12px;
  }

  .page-faq .faq-contact li {
    padding: 13px 14px;
  }
}

@media (min-width: 700px) {
  .page-faq .faq-contact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-group-head {
    display: grid;
    grid-template-columns: 62fr 38fr;
    column-gap: clamp(24px, 3vw, 56px);
    align-items: start;
  }

  .page-faq .faq-group-head .eyebrow {
    grid-column: 1 / -1;
    margin-bottom: 10px;
  }

  .page-faq .faq-group-head h2 {
    margin-bottom: 0;
  }

  .page-faq .faq-cite-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1240px) {
  .page-faq .faq-contact {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-tab,
  .page-faq .faq-item,
  .page-faq .faq-idx,
  .page-faq .faq-toggle::before,
  .page-faq .faq-toggle::after,
  .page-faq .breadcrumb a {
    transition-duration: .01ms;
  }

  .page-faq .faq-tab:hover,
  .page-faq .faq-tab:focus-visible {
    transform: none;
  }
}