.page-faq {
  --faq-index-w: 64px;
  --faq-rule: rgba(168, 216, 208, 0.16);
  --faq-rule-paper: rgba(42, 31, 24, 0.14);
  background: var(--c-ink);
  color: var(--c-cream);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: 32px 0 var(--space-xl);
  background:
    radial-gradient(circle at 84% 16%, rgba(53, 224, 192, 0.14), transparent 58%),
    radial-gradient(circle at 8% 88%, rgba(232, 180, 74, 0.10), transparent 52%),
    var(--c-ink);
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .breadcrumb {
  margin-bottom: var(--space-md);
}

.page-faq .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-6);
  letter-spacing: var(--track-mono);
  color: var(--c-gray);
}

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

.page-faq .breadcrumb-item a {
  color: var(--c-pale);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

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

.page-faq .breadcrumb-item[aria-current="page"] {
  color: var(--c-gold);
}

.page-faq .faq-hero-inner {
  display: grid;
  gap: var(--space-lg);
  align-items: center;
}

.page-faq .display-title {
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 4.6vw, 3.1rem);
  font-weight: 900;
  line-height: var(--lh-display);
  letter-spacing: var(--track-display);
  color: var(--c-cream);
  margin: 12px 0 var(--space-md);
  max-width: 20ch;
}

.page-faq .lede {
  font-size: var(--fs-5);
  line-height: var(--lh-body);
  letter-spacing: var(--track-body);
  color: var(--c-pale);
  max-width: 58ch;
  margin: 0 0 var(--space-md);
}

.page-faq .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.page-faq .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 26px;
  font-family: var(--font-body);
  font-size: var(--fs-6);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 160ms ease, background-color 160ms ease, border-color 160ms ease, color 160ms ease;
}

.page-faq .btn--primary {
  background: var(--c-coral);
  border-color: var(--c-coral);
  color: var(--c-deep);
}

.page-faq .btn--ghost {
  background: transparent;
  border-color: var(--line-gold);
  color: var(--c-gold);
}

.page-faq .btn:hover,
.page-faq .btn:focus-visible {
  transform: translateY(-2px);
}

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

.page-faq .faq-hero-visual {
  display: flex;
  justify-content: center;
}

.page-faq .hero-chips {
  width: min(100%, 320px);
  height: auto;
  display: block;
}

@keyframes faqRise {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: none; }
}

.page-faq .faq-hero-text > * {
  animation: faqRise 460ms ease both;
}

.page-faq .faq-hero-text > *:nth-child(2) { animation-delay: 70ms; }
.page-faq .faq-hero-text > *:nth-child(3) { animation-delay: 140ms; }
.page-faq .faq-hero-text > *:nth-child(4) { animation-delay: 210ms; }

@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding-top: 48px;
  }
  .page-faq .faq-hero-inner {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: var(--space-xl);
  }
}

/* ---------- 通用区块头 ---------- */
.page-faq .triage-band,
.page-faq .qa-band {
  padding: var(--space-xl) 0;
}

.page-faq .band-head {
  max-width: 70ch;
  margin-bottom: var(--space-lg);
}

.page-faq .section-title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 900;
  line-height: 1.28;
  letter-spacing: var(--track-display);
  color: var(--c-cream);
  margin: 10px 0 10px;
}

.page-faq .band-sub {
  font-size: var(--fs-5);
  line-height: var(--lh-body);
  color: var(--c-pale);
  margin: 0;
  max-width: 62ch;
}

/* ---------- 三分支判断 ---------- */
.page-faq .triage {
  display: grid;
  gap: var(--space-md);
  align-items: center;
}

.page-faq .triage-map {
  display: flex;
  justify-content: center;
  padding: var(--space-sm) 0;
}

.page-faq .triage-svg {
  width: 100%;
  max-width: 460px;
  height: auto;
  display: block;
}

.page-faq .triage-svg text {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: var(--track-mono);
  font-weight: 700;
}

.page-faq .media-frame {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line-soft);
}

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

.page-faq .triage-media img {
  aspect-ratio: 16 / 9;
}

.page-faq .media-frame-caption {
  padding: 12px 16px;
  font-size: var(--fs-6);
  line-height: 1.7;
  color: var(--c-gray);
  border-top: 1px solid var(--line-soft);
}

.page-faq .triage-cards {
  list-style: none;
  margin: var(--space-lg) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-md);
}

.page-faq .triage-card {
  padding: 22px 22px 20px;
  background: rgba(53, 224, 192, 0.04);
  border: 1px solid var(--line-soft);
  border-left: 2px solid var(--c-neon);
  transition: transform 180ms ease, background-color 180ms ease;
}

.page-faq .triage-card--gold { border-left-color: var(--c-gold); }
.page-faq .triage-card--coral { border-left-color: var(--c-coral); }

.page-faq .triage-card:hover,
.page-faq .triage-card:focus-within {
  transform: translateY(-2px);
  background: rgba(53, 224, 192, 0.08);
}

.page-faq .triage-tag {
  font-family: var(--font-mono);
  font-size: var(--fs-6);
  letter-spacing: var(--track-mono);
  color: var(--c-neon);
  margin: 0 0 10px;
}

.page-faq .triage-card--gold .triage-tag { color: var(--c-gold); }
.page-faq .triage-card--coral .triage-tag { color: var(--c-coral); }

.page-faq .triage-card-title {
  font-size: var(--fs-4);
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: 0.01em;
  color: var(--c-cream);
  margin: 0 0 10px;
  transition: color 160ms ease;
}

.page-faq .triage-card--gold:hover .triage-card-title,
.page-faq .triage-card--gold:focus-within .triage-card-title { color: var(--c-gold); }
.page-faq .triage-card--coral:hover .triage-card-title,
.page-faq .triage-card--coral:focus-within .triage-card-title { color: var(--c-coral); }
.page-faq .triage-card--neon:hover .triage-card-title,
.page-faq .triage-card--neon:focus-within .triage-card-title { color: var(--c-neon); }

.page-faq .triage-desc {
  font-size: var(--fs-6);
  line-height: 1.8;
  color: var(--c-pale);
  margin: 0 0 14px;
}

.page-faq .triage-link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--fs-6);
  letter-spacing: var(--track-mono);
  color: var(--c-neon);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
}

.page-faq .triage-card--gold .triage-link { color: var(--c-gold); }
.page-faq .triage-card--coral .triage-link { color: var(--c-coral); }

.page-faq .triage-link:focus-visible {
  outline: 2px solid var(--c-coral);
  outline-offset: 4px;
}

@media (min-width: 760px) {
  .page-faq .triage {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: var(--space-lg);
  }
  .page-faq .triage-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 问答列表 ---------- */
.page-faq .qa-list {
  max-width: 860px;
}

.page-faq .qa-item {
  border-top: 1px solid var(--faq-rule);
  padding: 4px 0;
  scroll-margin-top: 96px;
}

.page-faq .qa-item:last-of-type {
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .qa-summary {
  display: grid;
  grid-template-columns: var(--faq-index-w) minmax(0, 1fr) 20px;
  align-items: baseline;
  gap: 16px;
  padding: 20px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa-summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.15rem;
  line-height: 1;
  color: var(--c-gray);
  text-align: right;
  transition: color 160ms ease, transform 160ms ease;
}

.page-faq .qa-item[open] > .qa-summary::after {
  content: "−";
  color: var(--c-coral);
}

.page-faq .qa-summary:hover::after {
  color: var(--c-gold);
}

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

.page-faq .qa-index {
  font-family: var(--font-mono);
  font-size: var(--fs-6);
  font-variant-numeric: tabular-nums;
  letter-spacing: var(--track-mono);
  color: var(--c-gold);
}

.page-faq .qa-question {
  font-size: clamp(1rem, 1.6vw, 1.125rem);
  font-weight: 700;
  line-height: 1.6;
  letter-spacing: 0.01em;
  color: var(--c-cream);
}

.page-faq .qa-answer {
  position: relative;
  margin-left: var(--faq-index-w);
  padding: 2px 0 24px 26px;
}

.page-faq .qa-item[open] > .qa-answer::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 22px;
  width: 2px;
  background: var(--c-coral);
}

.page-faq .qa-answer p {
  margin: 0;
  font-size: var(--fs-5);
  line-height: var(--lh-body);
  letter-spacing: var(--track-body);
  color: var(--c-pale);
  max-width: 62ch;
}

.page-faq .qa-answer a {
  color: var(--c-neon);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-faq .qa-answer a:hover,
.page-faq .qa-answer a:focus-visible {
  color: var(--c-gold);
}

@keyframes qaFlash {
  0%, 40% { background-color: rgba(232, 180, 74, 0.18); }
  100%    { background-color: transparent; }
}

.page-faq .qa-item:target {
  animation: qaFlash 2200ms ease-out both;
}

/* ---------- 纸面分区 ---------- */
.page-faq .paper-surface {
  background: var(--c-cream);
  color: var(--c-brown);
}

.page-faq .paper-surface .section-title {
  color: var(--c-brown);
}

.page-faq .paper-surface .band-sub {
  color: rgba(42, 31, 24, 0.78);
}

.page-faq .paper-surface .eyebrow {
  color: #9A6A15;
}

.page-faq .paper-surface .qa-item,
.page-faq .paper-surface .qa-item:last-of-type {
  border-color: var(--faq-rule-paper);
}

.page-faq .paper-surface .qa-index {
  color: rgba(42, 31, 24, 0.62);
}

.page-faq .paper-surface .qa-question {
  color: var(--c-brown);
}

.page-faq .paper-surface .qa-summary::after {
  color: rgba(42, 31, 24, 0.42);
}

.page-faq .paper-surface .qa-summary:hover::after {
  color: var(--c-coral);
}

.page-faq .paper-surface .qa-answer p {
  color: rgba(42, 31, 24, 0.84);
}

.page-faq .paper-surface .qa-answer a {
  color: #0E6B58;
}

.page-faq .paper-surface .qa-answer a:hover,
.page-faq .paper-surface .qa-answer a:focus-visible {
  color: var(--c-coral);
}

.page-faq .paper-surface .qa-item:target {
  animation: qaFlashPaper 2200ms ease-out both;
}

@keyframes qaFlashPaper {
  0%, 40% { background-color: rgba(255, 107, 74, 0.14); }
  100%    { background-color: transparent; }
}

/* ---------- 设备配图 ---------- */
.page-faq .device-media {
  margin: 0 0 var(--space-lg);
  max-width: 720px;
}

.page-faq .device-media img {
  aspect-ratio: 10 / 7;
}

/* ---------- 收尾 ---------- */
.page-faq .next-band {
  padding: var(--space-xl) 0;
  background:
    radial-gradient(circle at 18% 12%, rgba(53, 224, 192, 0.12), transparent 56%),
    radial-gradient(circle at 88% 82%, rgba(232, 180, 74, 0.10), transparent 58%),
    var(--c-deep);
  border-top: 1px solid var(--line-soft);
}

.page-faq .next-panel {
  max-width: 780px;
  padding: var(--space-lg) var(--space-md);
  border: 1px solid var(--line-soft);
  border-left: 2px solid var(--c-neon);
  background: rgba(11, 27, 43, 0.6);
}

.page-faq .next-panel .section-title {
  margin-bottom: var(--space-sm);
}

.page-faq .next-lede {
  font-size: var(--fs-5);
  line-height: var(--lh-body);
  color: var(--c-pale);
  margin: 0 0 var(--space-md);
  max-width: 60ch;
}

.page-faq .next-list {
  list-style: none;
  margin: 0 0 var(--space-md);
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .next-list li {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: baseline;
  font-size: var(--fs-6);
  line-height: 1.8;
  color: var(--c-pale);
  padding-left: 16px;
  position: relative;
}

.page-faq .next-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.82em;
  width: 8px;
  height: 1px;
  background: var(--c-gold);
}

.page-faq .next-key {
  font-family: var(--font-mono);
  font-size: var(--fs-6);
  letter-spacing: var(--track-mono);
  color: var(--c-gold);
}

.page-faq .next-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

/* ---------- 窄屏 ---------- */
@media (max-width: 640px) {
  .page-faq .qa-summary {
    grid-template-columns: 52px minmax(0, 1fr) 16px;
    gap: 12px;
    padding: 18px 0;
  }
  .page-faq .qa-answer {
    margin-left: 0;
    padding-left: 16px;
    padding-bottom: 20px;
  }
  .page-faq .qa-answer p {
    font-size: var(--fs-6);
  }
  .page-faq .next-panel {
    padding: var(--space-md) var(--space-sm);
  }
}

@media (max-width: 420px) {
  .page-faq .hero-actions .btn,
  .page-faq .next-actions .btn {
    width: 100%;
  }
  .page-faq .qa-summary {
    grid-template-columns: 46px minmax(0, 1fr) 16px;
    gap: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-hero-text > *,
  .page-faq .qa-item:target {
    animation: none !important;
  }
  .page-faq .btn,
  .page-faq .triage-card,
  .page-faq .qa-summary::after,
  .page-faq .triage-card-title {
    transition-duration: 0.01ms !important;
  }
  .page-faq .btn:hover,
  .page-faq .btn:focus-visible,
  .page-faq .triage-card:hover,
  .page-faq .triage-card:focus-within {
    transform: none;
  }
}