.page-faq {
  --faq-sec: #00A8FF;
  --faq-sec-soft: rgba(0, 168, 255, 0.14);
  --faq-panel: #0D1118;
  --faq-code-bg: #0B0F17;
  background:
    linear-gradient(180deg, rgba(0, 168, 255, 0.08) 0%, transparent 280px),
    linear-gradient(180deg, transparent 0%, rgba(138, 124, 255, 0.04) 100%),
    var(--bg-deep);
}

.page-faq .faq-hero {
  position: relative;
  padding: 44px 0 40px;
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 280px;
  height: 240px;
  background: linear-gradient(135deg, var(--vivid-orange-soft) 0%, transparent 70%);
  clip-path: polygon(100% 0, 0 0, 100% 100%);
  z-index: 0;
  pointer-events: none;
}

.page-faq .faq-hero-grid {
  position: relative;
  z-index: 1;
}

.page-faq .faq-eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--electric-blue);
  text-transform: uppercase;
  margin: 20px 0 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.page-faq .faq-eyebrow::before {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--electric-blue);
  display: inline-block;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-title);
  font-size: clamp(30px, 5vw, 48px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  margin: 14px 0 16px;
  max-width: 840px;
}

.page-faq .faq-lead {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 0 22px;
}

.page-faq .faq-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-hero-figure {
  margin: 28px 0 0;
  padding: 0;
}

.page-faq .faq-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--outline);
  background: var(--surface);
  max-width: 460px;
  margin-inline: auto;
}

.page-faq .faq-hero-figure figcaption {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 8px;
  padding-left: 2px;
  text-align: center;
}

.page-faq .faq-hero-figure figcaption::before {
  content: "◆ ";
  color: var(--vivid-orange);
}

.page-faq .faq-layout {
  display: grid;
  gap: 28px;
  padding: 0 0 72px;
}

.page-faq .faq-index-nav {
  align-self: start;
  background: var(--surface);
  border: 1px solid var(--outline);
  border-radius: var(--radius-md);
  padding: 18px 16px;
  order: 1;
}

.page-faq .faq-index-title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  margin: 0 0 6px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--outline);
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-index-list li {
  flex: 0 0 auto;
}

.page-faq .faq-index-list a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border: 1px solid var(--outline);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-faq .faq-index-list a:hover {
  border-color: var(--electric-blue);
  color: var(--electric-blue);
}

.page-faq .faq-index-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-secondary);
  transition: color 0.2s;
}

.page-faq .faq-index-list a:hover .faq-index-num {
  color: var(--electric-blue);
}

.page-faq .faq-index-note {
  margin-top: 14px;
  padding: 14px;
  background: var(--warning-bg);
  border: 1px solid rgba(255, 106, 0, 0.3);
  border-radius: var(--radius-sm);
}

.page-faq .faq-index-note p {
  margin: 0 0 10px;
  color: var(--code-text);
  font-size: 12px;
  line-height: 1.6;
}

.page-faq .faq-sections {
  order: 2;
  min-width: 0;
}

.page-faq .faq-section {
  position: relative;
  background:
    linear-gradient(0deg, rgba(255, 255, 255, 0.01) 0%, transparent 40%),
    var(--surface);
  border: 1px solid var(--outline);
  border-left: 3px solid var(--faq-sec);
  border-radius: var(--radius-md);
  padding: 22px 18px 20px;
  margin-bottom: 22px;
  box-shadow: 3px 4px 0 rgba(0, 0, 0, 0.28);
}

.page-faq .faq-section::after {
  content: "";
  position: absolute;
  right: 10px;
  bottom: 6px;
  width: 18px;
  height: 18px;
  background: var(--faq-sec);
  opacity: 0.7;
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-faq .faq-section[data-tone="blue"] {
  --faq-sec: var(--electric-blue);
  --faq-sec-soft: rgba(0, 168, 255, 0.1);
}

.page-faq .faq-section[data-tone="orange"] {
  --faq-sec: var(--vivid-orange);
  --faq-sec-soft: rgba(255, 106, 0, 0.1);
}

.page-faq .faq-section[data-tone="green"] {
  --faq-sec: var(--electric-green);
  --faq-sec-soft: rgba(0, 229, 176, 0.08);
}

.page-faq .faq-section[data-tone="violet"] {
  --faq-sec: var(--violet);
  --faq-sec-soft: rgba(139, 124, 255, 0.12);
}

.page-faq .faq-section-head {
  margin-bottom: 16px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--outline);
}

.page-faq .faq-section-head .section-index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--faq-sec);
}

.page-faq .faq-section-head h2 {
  font-family: var(--font-title);
  font-size: 21px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 6px 0 4px;
  line-height: 1.3;
}

.page-faq .faq-section-head p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 13px;
  line-height: 1.6;
}

.page-faq .faq-item {
  background: var(--panel-alt);
  border: 1px solid var(--outline);
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
  overflow: hidden;
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-faq .faq-item[open] {
  border-color: var(--faq-sec);
  box-shadow: 0 0 0 1px var(--faq-sec-soft);
}

.page-faq .faq-item summary {
  list-style: none;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 14px 14px 12px;
  cursor: pointer;
  user-select: none;
  transition: background 0.2s;
}

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

.page-faq .faq-item summary:hover {
  background: rgba(255, 255, 255, 0.03);
}

.page-faq .faq-item summary:focus-visible,
.page-faq .faq-index-list a:focus-visible {
  outline: 2px solid var(--violet);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.page-faq .faq-q-num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--faq-sec);
  flex-shrink: 0;
  line-height: 1.4;
  padding: 2px 0 0;
}

.page-faq .faq-q-title {
  flex: 1;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text-primary);
}

.page-faq .faq-toggle {
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--text-secondary);
  flex-shrink: 0;
  transition: transform 0.3s var(--ease), color 0.2s;
  padding-top: 3px;
}

.page-faq .faq-item[open] .faq-toggle {
  transform: rotate(45deg);
  color: var(--faq-sec);
}

.page-faq .faq-a-body {
  padding: 12px 14px 16px;
  border-top: 1px dashed var(--outline);
  margin: 0 14px 0;
  color: var(--text-secondary);
  font-size: 13px;
  line-height: 1.7;
  animation: faqIn 0.3s var(--ease);
}

.page-faq .faq-a-body p {
  margin: 0 0 8px;
}

.page-faq .faq-a-body p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-a-body a {
  color: var(--electric-blue);
  text-decoration: underline;
  text-underline-offset: 2px;
}

@keyframes faqIn {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-faq .faq-code-block {
  margin-top: 14px;
  background: var(--faq-code-bg, #0B0F17);
  border: 1px dashed var(--faq-sec);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
}

.page-faq .faq-code-head {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--faq-sec);
  margin-bottom: 8px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

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

.page-faq .faq-code-steps li {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--text-secondary);
  padding: 2px 0;
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.page-faq .faq-code-steps .cmd {
  color: var(--electric-green);
  flex-shrink: 0;
  font-weight: 700;
}

.page-faq .faq-inline-figure {
  margin: 16px 0 4px;
}

.page-faq .faq-inline-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--outline);
  background: var(--surface);
  max-width: 420px;
}

.page-faq .faq-inline-figure figcaption {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-secondary);
  margin-top: 6px;
}

.page-faq .faq-inline-figure figcaption::before {
  content: "◆ ";
  color: var(--vivid-orange);
}

@media (min-width: 720px) {
  .page-faq .faq-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .page-faq .faq-section {
    padding: 28px 26px 24px;
  }

  .page-faq .faq-section-head h2 {
    font-size: 24px;
  }

  .page-faq .faq-q-title {
    font-size: 15px;
  }

  .page-faq .faq-a-body {
    font-size: 14px;
  }

  .page-faq .faq-code-steps li {
    font-size: 13px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: 56px 0 48px;
  }

  .page-faq .faq-hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 460px;
    gap: 48px;
    align-items: center;
  }

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

  .page-faq .faq-hero-figure img {
    margin-inline: 0;
  }

  .page-faq .faq-layout {
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 40px;
  }

  .page-faq .faq-index-nav {
    position: sticky;
    top: calc(var(--header-height) + 20px);
  }

  .page-faq .faq-index-list {
    flex-direction: column;
    overflow: visible;
    gap: 0;
  }

  .page-faq .faq-index-list li {
    flex: none;
    border-bottom: 1px solid var(--outline);
  }

  .page-faq .faq-index-list li:first-child {
    border-top: 1px solid var(--outline);
  }

  .page-faq .faq-index-list a {
    border: 0;
    border-radius: 0;
    padding: 13px 4px;
    white-space: normal;
  }

  .page-faq .faq-index-list a:hover {
    border: 0;
    background: rgba(255, 255, 255, 0.02);
    color: var(--electric-blue);
  }

  .page-faq .faq-index-note {
    margin-top: 20px;
  }

  .page-faq .faq-inline-figure {
    max-width: 420px;
    margin-left: auto;
    margin-right: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}