.page-faq {
  --faq-sticky-top: 96px;
  background: var(--paper);
  color: var(--graphite);
}

.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 24px 0 0;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--lead);
}

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

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

.page-faq .crumb-current {
  color: var(--graphite);
  font-weight: 700;
}

.page-faq .faq-hero {
  position: relative;
  padding: 26px 0 40px;
  border-bottom: var(--edge);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 96px;
  height: 6px;
  background: var(--lime);
}

.page-faq .faq-kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--lake);
}

.page-faq .faq-hero h1 {
  margin: 0 0 18px;
  max-width: 20ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 6vw, 50px);
  line-height: 1.1;
  letter-spacing: -.01em;
  color: var(--ink-blue);
}

.page-faq .faq-lead {
  margin: 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--lead);
}

/* 坐标索引 */
.page-faq .faq-index {
  background: var(--ink-blue);
  border-bottom: 2px solid var(--night-ink);
  padding: 44px 0 52px;
}

.page-faq .faq-index-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-faq .faq-index-visual {
  position: relative;
}

.page-faq .faq-index-visual img {
  display: block;
  width: 100%;
  height: auto;
  border: 2px solid var(--ice);
}

.page-faq .faq-index-visual::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -12px;
  width: 88px;
  height: 6px;
  background: var(--sunset);
}

.page-faq .faq-index-title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 20px;
  letter-spacing: .01em;
  color: var(--paper);
  transform: rotate(-2deg);
  transform-origin: left center;
}

.page-faq .faq-coord {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.page-faq .faq-coord a {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto;
  gap: 2px 12px;
  padding: 13px 15px;
  background: rgba(6, 21, 48, .6);
  border: 2px solid rgba(169, 197, 255, .35);
  color: var(--paper);
  text-decoration: none;
  transition: border-color var(--fast) var(--ease), transform var(--fast) var(--ease), background var(--fast) var(--ease);
}

.page-faq .faq-coord a:hover,
.page-faq .faq-coord a:focus-visible {
  border-color: var(--lime);
  background: rgba(6, 21, 48, .9);
  transform: translate(-2px, -2px);
}

.page-faq .faq-coord a:focus-visible {
  outline: 3px solid var(--lime);
  outline-offset: 2px;
}

.page-faq .faq-coord-num {
  grid-row: 1 / span 2;
  align-self: start;
  padding-top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--sunset);
}

.page-faq .faq-coord-name {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.3;
}

.page-faq .faq-coord-desc {
  font-size: 12px;
  line-height: 1.5;
  color: var(--ice);
}

/* 主体两栏 */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  padding-top: 48px;
  padding-bottom: 72px;
}

.page-faq .faq-group {
  margin-bottom: 52px;
  scroll-margin-top: 110px;
}

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

.page-faq .faq-group-head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px 14px;
  padding-bottom: 14px;
  margin-bottom: 20px;
  border-bottom: 2px solid var(--night-ink);
}

.page-faq .faq-group-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  padding: 3px 8px;
  background: var(--lime);
  color: var(--night-ink);
  line-height: 1.4;
}

.page-faq .faq-group-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(19px, 3.4vw, 27px);
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--ink-blue);
  transform: rotate(-2deg);
  transform-origin: left center;
}

/* 折叠条目 */
.page-faq .qa {
  position: relative;
  margin-bottom: 12px;
  background: var(--card-white);
  border: 2px solid var(--night-ink);
  border-left-width: 4px;
  border-left-color: var(--mist);
  box-shadow: var(--hard-sm);
  transition: box-shadow var(--fast) var(--ease), border-left-color var(--fast) var(--ease);
}

.page-faq .qa:hover {
  box-shadow: 4px 4px 0 var(--night-ink);
}

.page-faq .qa[open] {
  border-left-color: var(--lake);
}

.page-faq .qa summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--graphite);
  transition: background var(--fast) var(--ease);
}

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

.page-faq .qa summary:hover {
  background: var(--mist);
}

.page-faq .qa summary:focus-visible {
  outline: 3px solid var(--lime);
  outline-offset: 2px;
}

.page-faq .qa-mark {
  position: relative;
  flex: 0 0 auto;
  width: 13px;
  height: 13px;
  margin-top: 5px;
  border: 2px solid var(--night-ink);
  background: var(--paper);
}

.page-faq .qa-mark::before,
.page-faq .qa-mark::after {
  content: "";
  position: absolute;
  background: var(--night-ink);
}

.page-faq .qa-mark::before {
  left: 50%;
  top: 1px;
  bottom: 1px;
  width: 2px;
  transform: translateX(-50%);
}

.page-faq .qa-mark::after {
  top: 50%;
  left: 1px;
  right: 1px;
  height: 2px;
  transform: translateY(-50%);
}

.page-faq .qa[open] .qa-mark::before {
  display: none;
}

.page-faq .qa-a {
  padding: 0 16px 16px;
  border-top: 1px dashed rgba(90, 100, 120, .45);
}

.page-faq .qa-a > p {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--lead);
}

.page-faq .qa-a a.link-more {
  color: var(--ink-blue);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 2px solid var(--lime);
}

.page-faq .qa-a a.link-more:hover,
.page-faq .qa-a a.link-more:focus-visible {
  background: var(--lime);
  color: var(--night-ink);
}

.page-faq .qa-steps {
  counter-reset: faqstep;
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
}

.page-faq .qa-steps li {
  position: relative;
  counter-increment: faqstep;
  padding-left: 34px;
  margin-bottom: 9px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--lead);
}

.page-faq .qa-steps li:last-child {
  margin-bottom: 0;
}

.page-faq .qa-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 3px;
  padding-bottom: 1px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--sunset);
  border-bottom: 2px solid var(--sunset);
}

/* 图 */
.page-faq .faq-figure {
  margin: 0 0 20px;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 2px solid var(--night-ink);
  box-shadow: var(--hard-sm);
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--lead);
}

/* 侧栏联系卡 */
.page-faq .faq-aside {
  align-self: start;
}

.page-faq .faq-card-sticky {
  position: relative;
}

.page-faq .faq-support-card {
  padding: 22px 20px;
  background: var(--ink-blue);
  border: 2px solid var(--night-ink);
  box-shadow: var(--hard);
  color: var(--paper);
}

.page-faq .faq-support-kicker {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--lime);
}

.page-faq .faq-support-title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 21px;
  line-height: 1.2;
  color: var(--paper);
}

.page-faq .faq-support-list {
  margin: 0 0 16px;
}

.page-faq .faq-support-list dt {
  margin-top: 12px;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--ice);
}

.page-faq .faq-support-list dt:first-child {
  margin-top: 0;
}

.page-faq .faq-support-list dd {
  margin: 4px 0 0;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.5;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-support-note {
  margin: 0 0 18px;
  padding-top: 14px;
  border-top: 1px solid rgba(169, 197, 255, .3);
  font-size: 12px;
  line-height: 1.7;
  color: var(--ice);
}

.page-faq .faq-support-card .btn {
  display: block;
  width: 100%;
  text-align: center;
  padding: 11px 16px;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  background: var(--lime);
  color: var(--night-ink);
  border: 2px solid var(--night-ink);
  box-shadow: var(--hard-sm);
  transition: transform var(--fast) var(--ease), box-shadow var(--fast) var(--ease);
}

.page-faq .faq-support-card .btn:hover,
.page-faq .faq-support-card .btn:focus-visible {
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 var(--night-ink);
}

.page-faq .faq-support-card .btn:focus-visible {
  outline: 3px solid var(--paper);
  outline-offset: 2px;
}

@media (min-width: 640px) {
  .page-faq .faq-coord {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-index-grid {
    grid-template-columns: 5fr 7fr;
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-index {
    padding: 56px 0 64px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 1fr) 288px;
    gap: 56px;
  }

  .page-faq .faq-card-sticky {
    position: sticky;
    top: var(--faq-sticky-top);
  }
}

@media (max-width: 520px) {
  .page-faq .faq-hero h1 {
    max-width: none;
  }

  .page-faq .faq-group-head {
    gap: 8px 10px;
  }

  .page-faq .qa summary {
    padding: 14px 13px;
    font-size: 14px;
  }

  .page-faq .qa-a {
    padding: 0 13px 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq * {
    transition: none !important;
  }

  .page-faq .faq-index-title,
  .page-faq .faq-group-title {
    transform: none;
  }
}