.page-faq {
  --faq-accent: var(--cyan);
  --faq-ink-body: rgba(243, 233, 214, 0.82);
  padding-bottom: 76px;
}

.page-faq .crumbs {
  margin: 20px 0 24px;
}

/* ---------- 首屏框景 ---------- */
.page-faq .faq-hero {
  position: relative;
  border: 1px solid var(--rule);
  border-radius: var(--radius-l);
  background:
    radial-gradient(120% 100% at 92% -20%, rgba(53, 224, 208, 0.16), transparent 58%),
    radial-gradient(90% 80% at 0% 130%, rgba(255, 122, 47, 0.12), transparent 62%),
    linear-gradient(155deg, var(--ink-panel), var(--ink-deep) 66%);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background: repeating-linear-gradient(90deg, var(--cyan) 0 2px, transparent 2px 15px);
  opacity: 0.45;
  pointer-events: none;
}

.page-faq .faq-hero-inner {
  position: relative;
  z-index: 1;
  padding: 40px 22px 32px;
  display: grid;
  gap: 28px;
}

.page-faq .faq-hero-inner::before {
  content: "";
  position: absolute;
  inset: 12px;
  border: 1px dashed rgba(140, 163, 191, 0.24);
  border-radius: calc(var(--radius-l) - 8px);
  pointer-events: none;
}

.page-faq .faq-hero-copy h1 {
  margin: 10px 0 16px;
  line-height: 1.16;
  letter-spacing: -0.02em;
  max-width: 20ch;
}

.page-faq .faq-hero-copy .prose {
  max-width: 62ch;
}

.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-faq .faq-hero-panel {
  border: 1px solid var(--rule);
  border-radius: var(--radius-m);
  background: rgba(7, 14, 26, 0.62);
  padding: 18px 20px;
}

.page-faq .faq-panel-label {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-panel-facts {
  margin: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-panel-facts > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--rule);
}

.page-faq .faq-panel-facts > div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-faq .faq-panel-facts dt {
  font-size: 14px;
  color: var(--mist);
}

.page-faq .faq-panel-facts dd {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--cyan);
}

/* ---------- 三步自查 ---------- */
.page-faq .faq-check {
  margin-top: 36px;
  display: grid;
  gap: 28px;
}

.page-faq .faq-check h2 {
  margin: 8px 0 14px;
}

.page-faq .faq-check .prose {
  max-width: 64ch;
}

.page-faq .faq-steps {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  counter-reset: faqstep;
  display: grid;
  gap: 12px;
}

.page-faq .faq-steps li {
  position: relative;
  counter-increment: faqstep;
  padding: 16px 18px 16px 60px;
  border: 1px solid var(--rule);
  border-radius: var(--radius-m);
  background: linear-gradient(180deg, rgba(17, 31, 53, 0.92), rgba(11, 20, 36, 0.72));
}

.page-faq .faq-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 16px;
  top: 16px;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border: 1px solid var(--cyan);
  border-radius: 9px;
  background: rgba(53, 224, 208, 0.09);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
}

.page-faq .faq-steps h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 800;
}

.page-faq .faq-steps p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

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

.page-faq .faq-check-figure .media-frame {
  border: 1px solid var(--rule);
  border-radius: var(--radius-m);
  overflow: hidden;
}

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

/* ---------- 分类主体 ---------- */
.page-faq .faq-desk {
  margin-top: 64px;
}

.page-faq .faq-desk > h2 {
  margin: 0 0 24px;
}

.page-faq .faq-body {
  display: grid;
  gap: 24px;
}

.page-faq .faq-index {
  position: sticky;
  top: var(--head-h);
  z-index: 6;
  padding: 10px 0 12px;
  background: linear-gradient(180deg, var(--ink-deep) 72%, rgba(11, 20, 36, 0));
}

.page-faq .faq-index ul {
  counter-reset: faqcat;
  display: flex;
  gap: 10px;
  margin: 0;
  padding: 0 2px 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-index li {
  counter-increment: faqcat;
  flex: 0 0 auto;
}

.page-faq .faq-index a {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 15px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  color: var(--paper);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease), color 0.25s var(--ease);
}

.page-faq .faq-index a::before {
  content: counter(faqcat, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan);
}

.page-faq .faq-index a:hover,
.page-faq .faq-index a:focus-visible {
  border-color: var(--cyan);
  background: rgba(53, 224, 208, 0.1);
  color: var(--cyan);
}

.page-faq .faq-figure {
  margin: 0 0 8px;
}

.page-faq .faq-figure .media-frame {
  border: 1px solid var(--rule);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-faq .faq-group {
  margin-top: 40px;
  scroll-margin-top: 140px;
}

.page-faq .faq-group-head {
  margin-bottom: 14px;
}

.page-faq .faq-group-head h3 {
  margin: 6px 0 10px;
}

.page-faq .faq-group-head .prose {
  max-width: 68ch;
}

.page-faq .faq-group--entry {
  --faq-accent: var(--cyan);
}

.page-faq .faq-group--version {
  --faq-accent: var(--orange);
}

.page-faq .faq-group--stats {
  --faq-accent: var(--lime);
}

.page-faq .faq-group--device {
  --faq-accent: var(--mist);
}

.page-faq .faq-list {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}

.page-faq .faq-item {
  border: 1px solid var(--rule);
  border-left: 3px solid var(--faq-accent);
  border-radius: var(--radius-m);
  background: linear-gradient(180deg, rgba(17, 31, 53, 0.86), rgba(11, 20, 36, 0.62));
  overflow: hidden;
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}

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

.page-faq .faq-item > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  list-style: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
  transition: color 0.25s var(--ease);
}

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

.page-faq .faq-item > summary::after {
  content: "+";
  flex: 0 0 auto;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border: 1px solid var(--faq-accent);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1;
  color: var(--faq-accent);
  transition: transform 0.25s var(--ease);
}

.page-faq .faq-item[open] > summary::after {
  content: "–";
  transform: rotate(180deg);
}

.page-faq .faq-item > summary:hover {
  color: var(--cyan);
}

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

.page-faq .faq-a {
  padding: 0 18px 18px;
  border-top: 1px dashed var(--rule);
}

.page-faq .faq-a p {
  margin: 14px 0 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--faq-ink-body);
  max-width: 70ch;
}

/* ---------- 收束区 ---------- */
.page-faq .faq-help {
  position: relative;
  margin-top: 64px;
  padding: 32px 22px;
  border-radius: var(--radius-l);
  background: var(--paper);
  color: var(--paper-ink);
  display: grid;
  gap: 26px;
  overflow: hidden;
}

.page-faq .faq-help::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(36, 30, 26, 0.07) 1px, transparent 1px);
  background-size: 14px 14px;
  pointer-events: none;
}

.page-faq .faq-help > * {
  position: relative;
  z-index: 1;
}

.page-faq .faq-help .kicker {
  color: var(--orange);
}

.page-faq .faq-help h2 {
  margin: 8px 0 14px;
  color: var(--paper-ink);
}

.page-faq .faq-help p {
  margin: 0 0 14px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(36, 30, 26, 0.86);
}

.page-faq .faq-help-actions {
  margin: 20px 0 0;
}

.page-faq .faq-help-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  margin-top: 16px;
}

.page-faq .faq-help-links a {
  color: var(--paper-ink);
  font-size: 14px;
  text-decoration: underline;
  text-decoration-color: var(--orange);
  text-underline-offset: 4px;
}

.page-faq .faq-help-contact {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-faq .faq-help-item {
  padding-top: 12px;
  border-top: 2px solid rgba(36, 30, 26, 0.16);
}

.page-faq .faq-help-item span {
  display: block;
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: rgba(36, 30, 26, 0.62);
}

.page-faq .faq-help-item strong {
  display: block;
  margin-top: 5px;
  font-family: var(--font-mono);
  font-size: 16px;
  word-break: break-word;
  color: var(--paper-ink);
}

/* ---------- 响应式 ---------- */
@media (min-width: 680px) {
  .page-faq .faq-hero-inner {
    padding: 46px 34px 38px;
  }

  .page-faq .faq-help {
    padding: 38px 32px;
  }

  .page-faq .faq-help-contact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 24px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-inner {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 0.9fr);
    align-items: end;
    gap: 44px;
    padding: 56px 46px 44px;
  }

  .page-faq .faq-check {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
    gap: 44px;
    margin-top: 56px;
  }

  .page-faq .faq-help {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.8fr);
    align-items: start;
    gap: 44px;
    padding: 44px 40px;
  }

  .page-faq .faq-help-contact {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-body {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-index {
    top: 26px;
    padding: 0;
    background: none;
  }

  .page-faq .faq-index ul {
    flex-direction: column;
    gap: 6px;
    overflow: visible;
    padding: 0;
  }

  .page-faq .faq-index li {
    flex: 1 1 auto;
  }

  .page-faq .faq-index a {
    width: 100%;
    border-radius: var(--radius-s);
    padding: 11px 14px;
    font-size: 14.5px;
  }

  .page-faq .faq-group {
    scroll-margin-top: 32px;
  }

  .page-faq .faq-figure {
    margin-bottom: 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-index a,
  .page-faq .faq-item > summary,
  .page-faq .faq-item > summary::after {
    transition: none;
  }
}