.page-faq {
  --faq-sidebar-w: 256px;
  --faq-gap: 20px;
  background: var(--c-black);
  color: var(--c-white);
}

.page-faq__hero {
  position: relative;
  padding: calc(var(--header-h) + 40px) 0 56px;
  background:
    linear-gradient(135deg, rgba(139, 0, 255, .2) 0%, transparent 42%),
    linear-gradient(315deg, rgba(200, 255, 0, .05) 0%, transparent 28%),
    var(--c-black);
  border-bottom: 1px solid var(--c-rock);
  overflow: hidden;
}

.page-faq__hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--c-rock-light) 1px, transparent 1px),
    linear-gradient(90deg, var(--c-rock-light) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, .8), transparent 80%);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, .8), transparent 80%);
  pointer-events: none;
}

.page-faq__hero::after {
  content: "";
  position: absolute;
  right: -4%;
  top: -18%;
  width: 56%;
  height: 130%;
  background: linear-gradient(180deg, rgba(139, 0, 255, .32), transparent 72%);
  clip-path: polygon(26% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-faq__breadcrumb {
  position: relative;
  z-index: 2;
  margin-bottom: 32px;
}

.page-faq__breadcrumb-link {
  color: var(--c-silver);
  text-decoration: none;
  transition: color .2s ease;
}

.page-faq__breadcrumb-link:hover {
  color: var(--c-neon);
}

.page-faq__hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  align-items: center;
}

.page-faq__hero-copy {
  min-width: 0;
}

.page-faq__hero-kicker {
  display: inline-block;
  color: var(--c-neon);
  font-size: 12px;
  letter-spacing: .04em;
  padding: 6px 10px;
  border: 1px solid var(--c-neon-line);
  background: var(--c-neon-soft);
}

.page-faq__hero-title {
  margin: 16px 0 14px;
  font-family: var(--font-heading);
  font-size: clamp(38px, 8vw, 60px);
  line-height: 1.06;
  letter-spacing: -.02em;
  color: var(--c-white);
  position: relative;
}

.page-faq__hero-title::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--c-neon);
  margin-right: 14px;
  transform: translateY(-8px);
}

.page-faq__hero-desc {
  color: var(--c-silver);
  font-size: 16px;
  line-height: 1.8;
  max-width: 44em;
  margin: 0;
}

.page-faq__hot-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
  align-items: center;
}

.page-faq__hot-list a {
  text-decoration: none;
  transition: transform .2s var(--ease-out), border-color .2s ease, color .2s ease;
}

.page-faq__hot-list a:hover {
  transform: translateY(-2px);
  border-color: var(--c-neon);
  color: var(--c-neon);
}

.page-faq__hero-visual {
  position: relative;
  margin: 0;
  max-width: 560px;
}

.page-faq__hero-visual::before {
  content: "";
  position: absolute;
  top: -14px;
  right: -14px;
  width: 64%;
  height: 72%;
  border: 1px solid var(--c-purple-line);
  clip-path: polygon(0 0, 100% 0, 100% 72%, 72% 100%, 0 100%);
  z-index: 0;
  pointer-events: none;
}

.page-faq__hero-visual::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 28px;
  width: 48px;
  height: 6px;
  background: var(--c-neon);
  z-index: 2;
  pointer-events: none;
}

.page-faq__hero-image {
  position: relative;
  z-index: 1;
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border: 1px solid var(--c-purple-line);
  background: linear-gradient(135deg, var(--c-ink), #0c0c10);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}

.page-faq__hero-image::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(139, 0, 255, .38), transparent 46%);
  z-index: 1;
  pointer-events: none;
}

.page-faq__hero-image::after {
  content: "Q&A";
  position: absolute;
  right: -10px;
  bottom: -22px;
  font-family: var(--font-heading);
  font-size: clamp(56px, 10vw, 92px);
  line-height: 1;
  color: rgba(200, 255, 0, .07);
  z-index: 0;
  pointer-events: none;
}

.page-faq__hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-faq__hero-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-silver);
  letter-spacing: .06em;
}

.page-faq__body {
  position: relative;
  padding: 56px 0 88px;
  background: var(--c-black);
}

.page-faq__body::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--c-neon) 0%, var(--c-purple) 50%, transparent 100%);
  opacity: .5;
}

.page-faq__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 40px;
  align-items: start;
}

.page-faq__toc {
  min-width: 0;
}

.page-faq__toc-inner {
  padding: 0;
}

.page-faq__toc-label {
  display: block;
  color: var(--c-silver);
  margin-bottom: 14px;
  font-size: 12px;
  letter-spacing: .08em;
}

.page-faq__toc-list {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 4px 0 10px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq__toc-list::-webkit-scrollbar {
  display: none;
}

.page-faq__toc-list li {
  flex-shrink: 0;
}

.page-faq__toc-list a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border: 1px solid var(--c-rock);
  background: var(--c-ink);
  color: var(--c-silver);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  transition: color .2s ease, border-color .2s ease, background .2s ease, transform .2s ease;
}

.page-faq__toc-list a:hover,
.page-faq__toc-list a.is-active {
  color: var(--c-white);
  border-color: var(--c-neon);
  background: var(--c-neon-soft);
  transform: translateY(-1px);
}

.page-faq__toc-list a.is-active .page-faq__toc-num,
.page-faq__toc-list a:hover .page-faq__toc-num {
  color: var(--c-neon);
}

.page-faq__toc-num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--c-rock);
  transition: color .2s ease;
}

.page-faq__toc-help {
  display: none;
}

.page-faq__content {
  display: flex;
  flex-direction: column;
  gap: 56px;
  min-width: 0;
}

.page-faq__section {
  scroll-margin-top: calc(var(--header-h) + 24px);
  min-width: 0;
}

.page-faq__section-header {
  display: flex;
  align-items: flex-end;
  gap: 16px;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--c-rock);
  position: relative;
}

.page-faq__section-header::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 64px;
  height: 3px;
  background: linear-gradient(90deg, var(--c-neon), transparent);
}

.page-faq__section-num {
  font-family: var(--font-heading);
  font-size: 38px;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px var(--c-rock);
  flex-shrink: 0;
}

.page-faq__section-title {
  font-family: var(--font-heading);
  font-size: 24px;
  line-height: 1.3;
  margin: 6px 0 0;
  color: var(--c-white);
}

.page-faq__section-header .mono-label {
  color: var(--c-silver);
}

.page-faq__list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-faq__item {
  background: var(--c-ink);
  border: 1px solid var(--c-rock);
  border-left: 3px solid var(--c-rock);
  transition: border-color .25s ease, background .25s ease;
}

.page-faq__item[open] {
  border-color: var(--c-neon-line);
  border-left-color: var(--c-neon);
  background: #16191f;
}

.page-faq__item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 18px;
  cursor: pointer;
  list-style: none;
  color: var(--c-white);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.6;
  user-select: none;
}

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

.page-faq__item summary::marker {
  content: "";
}

.page-faq__item-mark {
  flex: 0 0 28px;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border: 1px solid var(--c-rock);
  color: var(--c-neon);
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  transition: transform .25s var(--ease-out), border-color .25s ease, background .25s ease;
}

.page-faq__item[open] .page-faq__item-mark {
  transform: rotate(45deg);
  border-color: var(--c-neon);
  background: var(--c-neon-soft);
}

.page-faq__answer {
  padding: 16px 18px 20px;
  border-top: 1px dashed var(--c-rock);
  color: var(--c-silver);
  font-size: 15px;
  line-height: 1.85;
}

.page-faq__answer p {
  margin: 0;
}

.page-faq__answer p + p {
  margin-top: 12px;
}

.page-faq__answer a {
  color: var(--c-neon);
  text-decoration: none;
  border-bottom: 1px solid var(--c-neon-line);
  padding-bottom: 1px;
  transition: border-color .2s ease;
}

.page-faq__answer a:hover {
  border-bottom-color: var(--c-neon);
}

.page-faq__num {
  font-family: var(--font-mono);
  font-weight: 500;
  color: var(--c-neon);
  white-space: nowrap;
}

.page-faq__tip {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  margin-top: 14px;
  padding: 12px 14px;
  background: var(--c-neon-soft);
  border-left: 2px solid var(--c-neon);
}

.page-faq__tip-mark {
  flex: 0 0 20px;
  width: 20px;
  height: 20px;
  display: grid;
  place-items: center;
  border: 1px solid var(--c-neon);
  color: var(--c-neon);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
}

.page-faq__tip-text {
  color: var(--c-white);
  font-size: 14px;
  line-height: 1.7;
}

.page-faq__compat {
  margin-top: 24px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  padding: 20px;
  border: 1px solid var(--c-rock);
  background: linear-gradient(135deg, var(--c-ink), var(--c-black) 62%);
  position: relative;
  overflow: hidden;
}

.page-faq__compat::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(var(--c-purple), var(--c-neon));
}

.page-faq__compat-copy {
  position: relative;
  z-index: 1;
  min-width: 0;
}

.page-faq__compat-title {
  font-family: var(--font-heading);
  font-size: 18px;
  line-height: 1.4;
  margin: 8px 0 8px;
  color: var(--c-white);
}

.page-faq__compat-desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-silver);
  margin: 0 0 16px;
}

.page-faq__compat-figure {
  margin: 0;
  min-width: 0;
}

.page-faq__compat-image {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: var(--c-ink);
  border: 1px solid var(--c-purple-line);
}

.page-faq__cta {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  padding: 24px 20px;
  border: 1px solid var(--c-rock);
  background:
    linear-gradient(135deg, rgba(139, 0, 255, .16), transparent 56%),
    var(--c-ink);
  position: relative;
  overflow: hidden;
}

.page-faq__cta::before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--c-neon), var(--c-purple));
}

.page-faq__cta-content {
  min-width: 0;
}

.page-faq__cta-title {
  font-family: var(--font-heading);
  font-size: 22px;
  margin: 6px 0 6px;
  color: var(--c-white);
}

.page-faq__cta-desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-silver);
  margin: 0;
}

@media (min-width: 641px) {
  .page-faq__hero-grid {
    gap: 40px;
  }

  .page-faq__compat {
    grid-template-columns: minmax(0, 1fr) minmax(220px, 260px);
    align-items: center;
  }

  .page-faq__cta {
    padding: 28px 28px;
  }
}

@media (min-width: 961px) {
  .page-faq__hero {
    padding: calc(var(--header-h) + 64px) 0 88px;
  }

  .page-faq__hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(320px, .85fr);
    gap: 56px;
    align-items: center;
  }

  .page-faq__hero-title {
    font-size: clamp(44px, 5vw, 64px);
  }

  .page-faq__body {
    padding: 88px 0 120px;
  }

  .page-faq__layout {
    grid-template-columns: var(--faq-sidebar-w) minmax(0, 1fr);
    gap: 56px;
  }

  .page-faq__toc {
    position: sticky;
    top: calc(var(--header-h) + 32px);
    align-self: start;
  }

  .page-faq__toc-inner {
    padding: 6px 0 16px;
    border-left: 2px solid var(--c-rock);
  }

  .page-faq__toc-label {
    padding-left: 16px;
    margin-bottom: 20px;
  }

  .page-faq__toc-list {
    display: block;
    gap: 0;
    overflow: visible;
    padding: 0;
  }

  .page-faq__toc-list li + li {
    margin-top: 2px;
  }

  .page-faq__toc-list a {
    display: flex;
    align-items: baseline;
    gap: 10px;
    padding: 10px 0 10px 16px;
    border: none;
    border-left: 2px solid transparent;
    margin-left: -2px;
    background: transparent;
    color: var(--c-silver);
    white-space: normal;
    font-size: 14px;
    transition: color .2s ease, border-color .2s ease, background .2s ease;
  }

  .page-faq__toc-list a:hover,
  .page-faq__toc-list a.is-active {
    background: linear-gradient(90deg, var(--c-neon-soft), transparent 80%);
    transform: none;
    border-color: var(--c-neon);
  }

  .page-faq__toc-num {
    font-size: 12px;
  }

  .page-faq__toc-help {
    display: block;
    margin-top: 28px;
    padding: 12px 14px;
    border: 1px dashed var(--c-rock);
    font-size: 13px;
    line-height: 1.7;
    color: var(--c-silver);
  }

  .page-faq__toc-help a {
    color: var(--c-neon);
    text-decoration: none;
    border-bottom: 1px solid var(--c-neon-line);
  }

  .page-faq__toc-help-mark {
    display: inline-grid;
    place-items: center;
    width: 18px;
    height: 18px;
    margin-right: 6px;
    border: 1px solid var(--c-neon);
    color: var(--c-neon);
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 700;
  }

  .page-faq__content {
    gap: 72px;
  }

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

  .page-faq__section-title {
    font-size: 28px;
  }
}