.page-faq {
  --faq-line-soft: rgba(255, 255, 255, 0.08);
  --faq-line-gold: rgba(200, 162, 74, 0.34);
  background: var(--ink-900);
  color: var(--text-main);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
}

.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

.page-faq h1,
.page-faq h2,
.page-faq h3 {
  font-family: var(--font-display);
  font-weight: 600;
  margin: 0;
}

.page-faq a:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 2px;
}

.page-faq .mono {
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  padding: 24px 0 56px;
  background-color: var(--ink-900);
  background-image:
    linear-gradient(rgba(200, 162, 74, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200, 162, 74, 0.07) 1px, transparent 1px);
  background-size: 34px 34px;
  border-bottom: 2px solid var(--faq-line-soft);
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: 36px;
  margin-top: 28px;
}

.page-faq .faq-hero-lead {
  border-left: 3px solid var(--gold-500);
  padding-left: 18px;
}

.page-faq .eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold-200);
  text-transform: uppercase;
}

.page-faq h1 {
  font-size: 30px;
  line-height: 1.24;
  letter-spacing: 0.06em;
  color: #F5F1E8;
}

.page-faq .faq-hero-text {
  margin: 18px 0 0;
  max-width: 36em;
  font-size: 16px;
  color: var(--text-soft);
  line-height: 1.85;
}

.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-faq .faq-hot {
  border: 2px solid var(--faq-line-gold);
  background: var(--ink-750);
  box-shadow: var(--shadow-hard);
  padding: 20px 20px 8px;
}

.page-faq .faq-hot-title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold-500);
}

.page-faq .faq-hot-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-hot-link {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 12px 0;
  border-top: 1px solid var(--faq-line-soft);
  color: var(--text-main);
  text-decoration: none;
  font-size: 15px;
  transition: color var(--t-fast);
}

.page-faq .faq-hot-link .mono {
  font-size: 12px;
  color: var(--mist-cyan);
  flex: 0 0 auto;
}

.page-faq .faq-hot-link:hover {
  color: var(--gold-200);
}

/* ---------- 分类索引条 ---------- */

.page-faq .faq-index {
  background: var(--ink-750);
  border-bottom: 2px solid var(--faq-line-gold);
}

.page-faq .faq-index-inner {
  display: flex;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-faq .faq-index-link {
  flex: 0 0 auto;
  padding: 14px 18px;
  border-right: 1px solid var(--faq-line-soft);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--text-soft);
  text-decoration: none;
  white-space: nowrap;
  transition: background var(--t-fast), color var(--t-fast);
}

.page-faq .faq-index-link:hover {
  color: var(--gold-200);
  background: rgba(200, 162, 74, 0.09);
}

.page-faq .faq-index-link[aria-current="true"] {
  background: var(--gold-200);
  color: var(--ink-900);
  font-weight: 600;
}

/* ---------- 章节骨架 ---------- */

.page-faq .faq-section {
  position: relative;
  padding: 60px 0 64px;
  border-bottom: 1px solid var(--faq-line-soft);
}

.page-faq .faq-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: var(--gold-500);
}

.page-faq .faq-section--device {
  background: var(--ink-750);
}

.page-faq .faq-section--teal {
  background: var(--teal-deep);
}

.page-faq .faq-section--ask {
  background: var(--indigo-800);
}

.page-faq .faq-section--ask::before {
  background: var(--amber-500);
}

.page-faq .faq-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  margin-bottom: 30px;
}

.page-faq .chapter-num {
  font-size: 22px;
  line-height: 1;
  color: var(--gold-500);
  letter-spacing: 0.1em;
}

.page-faq .chapter-title {
  font-size: 24px;
  line-height: 1.32;
  letter-spacing: 0.05em;
  color: #F5F1E8;
}

.page-faq .chapter-kicker {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist-cyan);
}

.page-faq .faq-lead {
  margin: 0 0 26px;
  max-width: 38em;
  font-size: 16px;
  color: var(--text-soft);
  line-height: 1.85;
}

.page-faq .faq-inline-link {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 224, 210, 0.45);
}

.page-faq .faq-inline-link:hover {
  color: var(--gold-200);
  border-bottom-color: var(--gold-200);
}

/* ---------- 图片容器 ---------- */

.page-faq .media-frame {
  margin: 0;
  border: 2px solid var(--gold-500);
  background: var(--ink-900);
  box-shadow: var(--shadow-hard);
}

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

.page-faq .media-cap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-top: 2px solid var(--gold-500);
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist-cyan);
}

.page-faq .media-tag {
  flex: 0 0 auto;
  background: var(--gold-500);
  color: var(--ink-900);
  padding: 1px 6px;
  font-size: 11px;
  letter-spacing: 0.08em;
}

/* ---------- §01 资料库 ---------- */

.page-faq .library-grid {
  display: grid;
  gap: 32px;
}

.page-faq .doc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--faq-line-soft);
}

.page-faq .doc-item {
  position: relative;
  padding: 18px 0 18px 18px;
  border-bottom: 1px solid var(--faq-line-soft);
}

.page-faq .doc-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  bottom: 18px;
  width: 2px;
  background: var(--faq-line-gold);
  transition: width var(--t-fast), background var(--t-fast);
}

.page-faq .doc-item:hover::before {
  width: 6px;
  background: var(--gold-500);
}

.page-faq .doc-id {
  display: inline-block;
  margin-bottom: 6px;
  font-size: 12px;
  color: var(--gold-500);
}

.page-faq .doc-name {
  font-size: 20px;
  letter-spacing: 0.05em;
  color: var(--gold-200);
  margin-bottom: 6px;
}

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

.page-faq .scale-block {
  margin-top: 32px;
  padding: 20px;
  border: 2px solid var(--faq-line-gold);
  background: var(--ink-750);
}

.page-faq .scale-title {
  margin: 0 0 6px;
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--gold-200);
}

.page-faq .faq-scale {
  display: block;
  width: 100%;
  height: auto;
}

.page-faq .faq-scale text {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  fill: var(--mist-cyan);
}

.page-faq .faq-scale .scale-line {
  stroke: var(--faq-line-gold);
  stroke-width: 2;
}

.page-faq .faq-scale .scale-node {
  fill: var(--ink-900);
  stroke: var(--mist-cyan);
  stroke-width: 2;
}

.page-faq .faq-scale .scale-node--now {
  fill: var(--gold-500);
  stroke: var(--gold-200);
}

.page-faq .faq-scale .scale-label--now {
  fill: var(--gold-200);
}

.page-faq .scale-note {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist-cyan);
}

/* ---------- §02 下载前确认 ---------- */

.page-faq .confirm-grid {
  display: grid;
  gap: 30px;
}

.page-faq .confirm-figure {
  border-color: var(--gold-200);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.4);
}

.page-faq .confirm-figure .media-cap {
  border-top-color: var(--gold-200);
}

.page-faq .confirm-item {
  display: flex;
  gap: 14px;
  padding: 18px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.page-faq .confirm-num {
  flex: 0 0 auto;
  font-size: 20px;
  line-height: 1.3;
  color: var(--gold-200);
}

.page-faq .confirm-name {
  font-size: 18px;
  letter-spacing: 0.04em;
  color: #F5F1E8;
  margin-bottom: 6px;
}

.page-faq .confirm-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(233, 230, 223, 0.86);
}

/* ---------- 问答组 ---------- */

.page-faq .faq-group {
  max-width: 900px;
}

.page-faq .faq-item {
  margin-bottom: 12px;
  border: 2px solid var(--faq-line-soft);
  border-left: 3px solid var(--faq-line-gold);
  background: rgba(0, 0, 0, 0.22);
  transition: border-color var(--t-fast);
}

.page-faq .faq-item[open] {
  border-left-color: var(--cyan-400);
  border-color: var(--faq-line-gold);
}

.page-faq .faq-item summary {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-main);
  transition: color var(--t-fast), background var(--t-fast);
}

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

.page-faq .faq-item summary:hover {
  color: var(--gold-200);
  background: rgba(200, 162, 74, 0.06);
}

.page-faq .q-id {
  flex: 0 0 auto;
  padding: 1px 6px;
  background: var(--gold-500);
  color: var(--ink-900);
  font-size: 12px;
  line-height: 1.7;
  transition: background var(--t-fast);
}

.page-faq .faq-item[open] .q-id {
  background: var(--cyan-400);
}

.page-faq .q-text {
  flex: 1 1 auto;
}

.page-faq .fold-body {
  padding: 14px 16px 18px 44px;
  border-top: 1px solid var(--faq-line-soft);
}

.page-faq .steps {
  counter-reset: step;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .steps li {
  counter-increment: step;
  position: relative;
  padding-left: 2.1em;
  margin-bottom: 10px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-soft);
}

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

.page-faq .steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--gold-500);
}

/* ---------- §06 提问 ---------- */

.page-faq .ask-grid {
  display: grid;
  gap: 30px;
}

.page-faq .ask-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.page-faq .ask-list li {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-soft);
}

.page-faq .ask-list .mono {
  flex: 0 0 auto;
  font-size: 12px;
  color: var(--amber-500);
}

.page-faq .ask-note {
  margin: 22px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-soft);
}

.page-faq .ask-template {
  border: 2px solid var(--gold-500);
  background: rgba(10, 13, 17, 0.55);
  box-shadow: var(--shadow-gold);
  padding: 18px;
}

.page-faq .ask-template-title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--gold-200);
}

.page-faq .faq-template {
  margin: 0;
  padding: 16px;
  background: var(--ink-900);
  border: 2px dashed var(--faq-line-gold);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 2;
  color: var(--text-main);
  white-space: pre-wrap;
  word-break: break-word;
  overflow-x: auto;
}

.page-faq .ask-template-note {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist-cyan);
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-hero {
    padding-top: 32px;
    padding-bottom: 72px;
  }

  .page-faq h1 {
    font-size: 38px;
  }

  .page-faq .faq-head {
    grid-template-columns: auto minmax(0, 1fr);
    column-gap: 22px;
    align-items: start;
  }

  .page-faq .chapter-num {
    grid-row: 1 / span 2;
    font-size: 40px;
    padding-top: 4px;
  }

  .page-faq .chapter-title {
    font-size: 26px;
  }

  .page-faq .faq-section {
    padding: 76px 0 80px;
  }

  .page-faq .doc-item {
    display: grid;
    grid-template-columns: 96px minmax(0, 1fr);
    column-gap: 18px;
    padding-left: 22px;
  }

  .page-faq .doc-id {
    margin-bottom: 0;
    padding-top: 4px;
  }

  .page-faq .fold-body {
    padding-left: 56px;
  }
}

@media (min-width: 960px) {
  .page-faq h1 {
    font-size: 44px;
  }

  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: 56px;
    align-items: end;
  }

  .page-faq .library-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 48px;
    align-items: start;
  }

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

  .page-faq .confirm-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .ask-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .chapter-num {
    font-size: 48px;
  }
}

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