.page-faq {
  --faq-pad: clamp(20px, 4vw, 40px);
  --faq-track-gap: clamp(18px, 3vw, 34px);
  background: var(--ink-900);
  color: var(--mist);
}

.page-faq .section {
  padding: clamp(56px, 8vw, 104px) 0;
}

/* ---------- hero ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(28px, 5vw, 56px) 0 clamp(40px, 6vw, 72px);
  background:
    radial-gradient(circle at 18% 24%, rgba(38, 224, 214, 0.14), transparent 46%),
    radial-gradient(circle at 78% 74%, rgba(255, 138, 61, 0.13), transparent 48%),
    var(--ink-900);
  overflow: hidden;
}

.page-faq .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0 0 clamp(24px, 4vw, 44px);
  padding: 0;
  font-size: 13px;
  font-family: var(--font-mono);
  color: var(--violet);
}

.page-faq .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: 8px;
  color: var(--line);
}

.page-faq .breadcrumb-item a {
  color: var(--mist);
  text-decoration: none;
}

.page-faq .breadcrumb-item a:hover {
  color: var(--cyan);
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  align-items: center;
}

.page-faq .faq-hero-copy h1 {
  margin: 12px 0 18px;
  font-family: var(--font-sans);
  font-size: clamp(30px, 6.4vw, 58px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--paper);
}

.page-faq .faq-hero-copy .lead {
  margin: 0;
  max-width: 46ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: 30px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.page-faq .faq-hero-facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13px;
  color: var(--mist);
}

.page-faq .faq-hero-facts .mono {
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--orange);
}

.page-faq .faq-hero-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--ink-800);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-deep);
}

.page-faq .faq-hero-visual img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  opacity: 0.5;
}

.page-faq .faq-orbit-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.page-faq .orbit-path {
  fill: none;
  stroke-width: 2;
  stroke-dasharray: 7 7;
}

.page-faq .orbit-path--cyan { stroke: var(--cyan); opacity: 0.85; }
.page-faq .orbit-path--orange { stroke: var(--orange); opacity: 0.85; }
.page-faq .orbit-path--out { stroke: var(--paper); opacity: 0.35; }

.page-faq .orbit-node--cyan { fill: var(--cyan); }
.page-faq .orbit-node--orange { fill: var(--orange); }
.page-faq .orbit-node--core { fill: var(--paper); }
.page-faq .orbit-node--end { fill: var(--wine); }

.page-faq .orbit-label {
  font-family: var(--font-mono);
  font-size: 14px;
  fill: var(--mist);
}

.page-faq .orbit-label--core {
  fill: var(--paper);
  text-anchor: middle;
}

/* ---------- tracks ---------- */
.page-faq .faq-tracks {
  background: var(--ink-800);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-faq .section-head h2 {
  margin: 10px 0 12px;
  font-size: clamp(24px, 4.4vw, 40px);
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-faq .section-head .lead {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-track-switch {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: clamp(26px, 4vw, 42px) 0 clamp(20px, 3vw, 30px);
}

.page-faq .track-tab {
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line);
  background: transparent;
  color: var(--mist);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

.page-faq .track-tab:hover {
  border-color: var(--cyan);
  color: var(--paper);
}

.page-faq .track-tab.is-active {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink-900);
}

.page-faq .faq-track-panel {
  position: relative;
  padding: clamp(22px, 3.4vw, 36px);
  border-radius: var(--radius-lg);
  background: var(--ink-900);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
}

.page-faq .faq-track-panel[hidden] {
  display: none;
}

.page-faq #track-device {
  border-left-color: var(--orange);
}

.page-faq .track-head h3 {
  margin: 8px 0 10px;
  font-size: clamp(20px, 3vw, 28px);
  color: var(--paper);
  line-height: 1.3;
}

.page-faq .track-head p {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .track-index {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--orange);
  margin: 0;
}

.page-faq .steps {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: var(--faq-track-gap);
}

.page-faq .step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  padding-top: var(--faq-track-gap);
  border-top: 1px dashed var(--line-soft);
}

.page-faq .step:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-faq .step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--cyan);
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--cyan);
  background: rgba(38, 224, 214, 0.08);
}

.page-faq #track-device .step-num {
  border-color: var(--orange);
  color: var(--orange);
  background: rgba(255, 138, 61, 0.08);
}

.page-faq .step-body h4 {
  margin: 0 0 8px;
  font-size: clamp(16px, 2vw, 18px);
  color: var(--paper);
  line-height: 1.4;
}

.page-faq .step-body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .step-note {
  margin-top: 8px !important;
  padding-left: 12px;
  border-left: 2px solid var(--line);
  font-size: 13.5px;
  color: var(--violet);
}

.page-faq .device-visual {
  margin: clamp(20px, 3vw, 30px) 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

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

.page-faq .track-merge {
  display: grid;
  gap: 14px;
  justify-items: start;
  margin-top: clamp(30px, 4vw, 46px);
  padding-top: clamp(24px, 3vw, 34px);
  border-top: 1px solid var(--line);
}

.page-faq .merge-line {
  display: block;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--ink-800) 42%, var(--orange));
  border-radius: 2px;
}

.page-faq .merge-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
  max-width: 56ch;
}

/* ---------- columns ---------- */
.page-faq .faq-columns {
  background: var(--ink-900);
}

.page-faq .column-layout {
  display: grid;
  gap: clamp(24px, 4vw, 42px);
  margin-top: clamp(26px, 4vw, 40px);
}

.page-faq .column-list {
  display: grid;
  gap: 0;
}

.page-faq .column-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .column-item:first-child {
  border-top: 1px solid var(--line-soft);
}

.page-faq .column-num {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--wine);
  margin: 0;
  padding-top: 3px;
}

.page-faq .column-item h3 {
  margin: 0 0 6px;
  font-size: clamp(16px, 2vw, 19px);
  color: var(--paper);
}

.page-faq .column-item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .column-aside {
  padding: clamp(22px, 3vw, 30px);
  border-radius: var(--radius-md);
  color: var(--paper-ink);
}

.page-faq .column-aside h3 {
  margin: 8px 0 10px;
  font-size: clamp(18px, 2.6vw, 22px);
  color: var(--paper-ink);
  line-height: 1.35;
}

.page-faq .column-aside p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
}

.page-faq .column-aside .aside-links {
  margin-top: 16px;
}

.page-faq .link-plain {
  color: var(--wine);
  font-size: 14px;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-faq .link-plain:hover {
  color: var(--paper-ink);
}

/* ---------- browser check ---------- */
.page-faq .faq-browser {
  background: var(--ink-800);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-faq .check-grid {
  display: grid;
  gap: 1px;
  margin-top: clamp(26px, 4vw, 40px);
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-faq .check-card {
  padding: clamp(20px, 3vw, 28px);
  background: var(--ink-900);
}

.page-faq .check-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--cyan);
  margin: 0 0 10px;
}

.page-faq .check-card h3 {
  margin: 0 0 8px;
  font-size: 17px;
  color: var(--paper);
}

.page-faq .check-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- QA accordion ---------- */
.page-faq .faq-qa {
  background: var(--ink-900);
}

.page-faq .qa-list {
  margin-top: clamp(24px, 4vw, 38px);
  display: grid;
  gap: 10px;
}

.page-faq .qa-item {
  border-radius: var(--radius-md);
  background: var(--ink-800);
  border: 1px solid var(--line);
  overflow: hidden;
  transition: border-color 0.25s ease;
}

.page-faq .qa-item.is-open {
  border-color: var(--cyan);
}

.page-faq .qa-trigger {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 16px 18px;
  background: transparent;
  border: 0;
  text-align: left;
  cursor: pointer;
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.5;
}

.page-faq .qa-trigger:hover {
  color: var(--cyan);
}

.page-faq .qa-cat {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  padding: 4px 9px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line);
  color: var(--violet);
  white-space: nowrap;
}

.page-faq .qa-mark {
  position: relative;
  width: 14px;
  height: 14px;
  flex: none;
}

.page-faq .qa-mark::before,
.page-faq .qa-mark::after {
  content: "";
  position: absolute;
  background: var(--orange);
  border-radius: 1px;
  transition: transform 0.25s ease;
}

.page-faq .qa-mark::before {
  top: 6px;
  left: 0;
  width: 14px;
  height: 2px;
}

.page-faq .qa-mark::after {
  top: 0;
  left: 6px;
  width: 2px;
  height: 14px;
}

.page-faq .qa-item.is-open .qa-mark::after {
  transform: scaleY(0);
}

.page-faq .qa-panel {
  padding: 0 18px 18px;
  border-top: 1px solid var(--line-soft);
}

.page-faq .qa-panel[hidden] {
  display: none;
}

.page-faq .qa-panel p {
  margin: 14px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- contact ---------- */
.page-faq .faq-contact {
  background: var(--ink-800);
  border-top: 1px solid var(--line);
}

.page-faq .contact-split {
  display: grid;
  gap: clamp(22px, 4vw, 38px);
}

.page-faq .contact-panel {
  padding: clamp(24px, 3.6vw, 38px);
  border-radius: var(--radius-lg);
  color: var(--paper-ink);
}

.page-faq .contact-panel h2 {
  margin: 10px 0 12px;
  font-size: clamp(22px, 3.6vw, 32px);
  line-height: 1.25;
  color: var(--paper-ink);
}

.page-faq .contact-panel > p {
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.8;
}

.page-faq .contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .contact-item {
  display: grid;
  gap: 4px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(42, 27, 22, 0.16);
}

.page-faq .contact-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--wine);
}

.page-faq .contact-value {
  font-size: 15px;
  font-weight: 600;
  word-break: break-word;
}

.page-faq .contact-hint {
  margin: 16px 0 0 !important;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(42, 27, 22, 0.7);
}

.page-faq .contact-checklist h3 {
  margin: 0 0 16px;
  font-size: clamp(18px, 2.6vw, 22px);
  color: var(--paper);
  line-height: 1.35;
}

.page-faq .check-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .check-list label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: var(--ink-900);
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--mist);
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.page-faq .check-list label:hover {
  border-color: var(--cyan);
  color: var(--paper);
}

.page-faq .check-list input {
  margin-top: 3px;
  accent-color: var(--cyan);
  flex: none;
}

.page-faq .check-list input:checked + span {
  color: var(--paper);
  text-decoration: line-through;
  text-decoration-color: var(--orange);
}

.page-faq .check-tip {
  margin: 16px 0 0;
  font-size: 13px;
  font-family: var(--font-mono);
  color: var(--violet);
}

.page-faq .contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 20px 0 0;
}

/* ---------- reveal ---------- */
.page-faq [data-reveal] {
  opacity: 1;
  transform: none;
}

.page-faq.has-js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.page-faq.has-js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- responsive ---------- */
@media (min-width: 720px) {
  .page-faq .check-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-faq .faq-hero-facts {
    gap: 10px 34px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-faq .column-layout {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .contact-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-track-panel {
    padding: clamp(30px, 3.4vw, 44px);
  }

  .page-faq .steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(20px, 2.4vw, 30px);
  }

  .page-faq .step {
    grid-template-columns: 1fr;
    gap: 12px;
    padding-top: 0;
    border-top: 0;
    border-left: 1px dashed var(--line-soft);
    padding-left: clamp(16px, 1.8vw, 22px);
  }

  .page-faq .step:first-child {
    border-left: 0;
    padding-left: 0;
  }

  .page-faq .device-visual {
    max-width: 720px;
  }

  .page-faq .track-merge {
    grid-template-columns: 1fr auto;
    align-items: center;
    justify-items: start;
  }

  .page-faq .merge-line {
    grid-column: 1 / -1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }

  .page-faq.has-js [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .page-faq .orbit-path {
    stroke-dasharray: none;
  }
}
</main>