.page-faq {
  --faq-toc-width: 264px;
  --faq-gap: 56px;
  background: var(--color-bg);
  color: var(--color-text);
}

.page-faq .faq-hero {
  position: relative;
  padding: 32px 0 28px;
  background:
    linear-gradient(135deg, rgba(0, 229, 255, 0.09) 0%, rgba(0, 229, 255, 0) 42%),
    var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 8px;
  background: linear-gradient(90deg, var(--color-cyan) 0 8px, transparent 8px 16px, var(--color-orange) 16px 24px, transparent 24px 32px);
  background-size: 32px 8px;
  opacity: 0.7;
}

.page-faq .faq-hero__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  margin-top: 28px;
}

.page-faq .faq-hero__aside {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-mono);
  color: var(--color-cyan);
  border-left: 3px solid var(--color-cyan);
  padding-left: 14px;
}

.page-faq .faq-hero__code {
  font-size: 28px;
  line-height: 1;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--color-cyan);
}

.page-faq .faq-hero__volume {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--color-muted);
}

.page-faq .faq-hero__kicker {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--color-orange);
}

.page-faq .faq-hero h1 {
  margin: 0;
  font-family: var(--font-heading);
  font-size: clamp(30px, 5vw, 52px);
  line-height: 1.12;
  letter-spacing: 0.01em;
}

.page-faq .faq-hero__sub {
  display: block;
  margin-top: 8px;
  font-size: clamp(17px, 2.4vw, 24px);
  color: var(--color-cyan);
  letter-spacing: 0.03em;
}

.page-faq .faq-hero__desc {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--color-muted);
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  margin-top: 30px;
}

.page-faq .faq-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-faq .faq-hero__stat-num {
  font-family: var(--font-mono);
  font-size: 26px;
  line-height: 1.1;
  color: var(--color-cyan);
}

.page-faq .faq-hero__stat-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-muted);
}

.page-faq .faq-hero__scale {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  margin-top: 34px;
  padding-top: 14px;
  border-top: 1px solid var(--color-border);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-muted);
}

.page-faq .faq-hero__scale span::before {
  content: "#";
  margin-right: 6px;
  color: var(--color-orange);
}

.page-faq .faq-manual {
  max-width: var(--container-w);
  margin-left: auto;
  margin-right: auto;
  padding: clamp(32px, 6vw, 64px) 20px;
}

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

.page-faq .faq-toc {
  margin-bottom: var(--faq-gap);
}

.page-faq .faq-toc__inner {
  position: relative;
  border: 1px solid var(--color-border);
  background: var(--color-bg-card);
  padding: 18px;
}

.page-faq .faq-toc__inner::before {
  content: "INDEX 目录";
  position: absolute;
  top: -9px;
  right: 12px;
  padding: 0 8px;
  background: var(--color-bg);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--color-cyan);
}

.page-faq .faq-toc__label {
  margin: 8px 0 12px;
  font-family: var(--font-heading);
  font-size: 18px;
  letter-spacing: 0.06em;
  color: var(--color-text);
}

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

.page-faq .faq-toc__list li {
  margin: 0;
}

.page-faq .faq-toc__list li + li {
  border-top: 1px solid var(--color-border);
}

.page-faq .faq-toc__list a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 4px;
  text-decoration: none;
  color: var(--color-text);
  transition: transform var(--tr-fast), background var(--tr-fast);
}

.page-faq .faq-toc__list a:hover {
  transform: translateX(4px);
  background: rgba(0, 229, 255, 0.05);
}

.page-faq .faq-toc__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-orange);
  width: 28px;
}

.page-faq .faq-toc__title {
  flex: 1;
  font-size: 15px;
}

.page-faq .faq-toc__arrow {
  color: var(--color-cyan);
  font-family: var(--font-mono);
  font-size: 13px;
}

.page-faq .faq-toc__note {
  margin-top: 14px;
  padding: 13px 14px;
  border-left: 2px solid var(--color-warn);
  background: rgba(255, 209, 102, 0.06);
}

.page-faq .faq-toc__note-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--color-warn);
}

.page-faq .faq-toc__note p {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-muted);
}

.page-faq .faq-section {
  padding-bottom: clamp(44px, 6vw, 72px);
}

.page-faq .faq-section + .faq-section {
  border-top: 1px solid var(--color-border);
  padding-top: clamp(44px, 6vw, 76px);
}

.page-faq .faq-section__head {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 18px;
}

.page-faq .faq-section__no {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 64px;
  height: 44px;
  background: var(--color-cyan);
  color: var(--color-bg-deep);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 18px;
  clip-path: polygon(0 0, 100% 0, calc(100% - 9px) 100%, 0 100%);
}

.page-faq .faq-section__title {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.page-faq .faq-section__cat {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--color-muted);
}

.page-faq .faq-section__title h2 {
  margin: 2px 0 0;
  font-family: var(--font-heading);
  font-size: clamp(23px, 3vw, 32px);
  line-height: 1.2;
  letter-spacing: 0.02em;
}

.page-faq .faq-section__rule {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--color-cyan), transparent);
}

.page-faq .faq-section__lead {
  margin: 0 0 24px;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--color-muted);
}

.page-faq .faq-fig-row {
  display: grid;
  gap: 22px;
  margin-bottom: 24px;
}

.page-faq .faq-fig {
  position: relative;
  padding: 10px;
  border: 1px solid var(--color-border);
  background: var(--color-bg-deep);
}

.page-faq .faq-fig::before,
.page-faq .faq-fig::after {
  content: "";
  position: absolute;
  width: 12px;
  height: 12px;
  border: 2px solid var(--color-cyan);
  top: -2px;
  left: -2px;
  border-right: none;
  border-bottom: none;
}

.page-faq .faq-fig::after {
  top: auto;
  left: auto;
  right: -2px;
  bottom: -2px;
  border: 2px solid var(--color-orange);
  border-left: none;
  border-top: none;
}

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

.page-faq .faq-fig__cap {
  display: block;
  padding: 10px 2px 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--color-muted);
}

.page-faq .faq-acc-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
}

.page-faq .faq-acc {
  margin: 0;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-cyan);
  transition: background var(--tr-fast), transform var(--tr-fast);
}

.page-faq .faq-acc[open] {
  background: rgba(230, 230, 230, 0.06);
  transform: translateX(2px);
}

.page-faq .faq-acc summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 16px 16px 14px;
  cursor: pointer;
  list-style: none;
  -webkit-appearance: none;
}

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

.page-faq .faq-acc__q {
  flex: 0 0 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 24px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-cyan);
  border: 1px solid var(--color-border);
  background: rgba(0, 229, 255, 0.06);
}

.page-faq .faq-acc__t {
  flex: 1;
  font-family: var(--font-heading);
  font-size: 15px;
  line-height: 1.5;
}

.page-faq .faq-acc__ico {
  position: relative;
  flex: 0 0 18px;
  width: 18px;
  height: 18px;
}

.page-faq .faq-acc__ico::before,
.page-faq .faq-acc__ico::after {
  content: "";
  position: absolute;
  left: 3px;
  right: 3px;
  top: 50%;
  height: 2px;
  background: var(--color-orange);
  transform-origin: center;
  transition: transform var(--tr-fast);
}

.page-faq .faq-acc__ico::after {
  transform: rotate(90deg);
}

.page-faq .faq-acc[open] .faq-acc__ico::after {
  transform: rotate(0deg);
}

.page-faq .faq-acc__a {
  padding: 4px 18px 18px 64px;
  border-top: 1px dashed var(--color-border);
  font-size: 14px;
  line-height: 1.85;
  color: var(--color-muted);
}

.page-faq .faq-acc__a p {
  margin: 12px 0 0;
}

.page-faq .faq-next {
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-deep);
  padding: 30px 0 38px;
}

.page-faq .faq-next__inner {
  display: flex;
  flex-direction: column;
  gap: 18px;
  align-items: flex-start;
}

.page-faq .faq-next__text h2 {
  margin: 0 0 6px;
  font-family: var(--font-heading);
  font-size: 22px;
  line-height: 1.3;
}

.page-faq .faq-next__text p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-muted);
}

.page-faq .faq-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

@media (min-width: 760px) {
  .page-faq .faq-hero__layout {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 28px;
    align-items: start;
  }

  .page-faq .faq-hero__aside {
    display: block;
    border-left: none;
    padding-left: 0;
  }

  .page-faq .faq-hero__code {
    display: block;
    writing-mode: vertical-rl;
    font-size: clamp(44px, 8vw, 84px);
    letter-spacing: 0.08em;
    transform: rotate(180deg);
  }

  .page-faq .faq-hero__volume {
    display: block;
    margin-top: 14px;
    writing-mode: vertical-rl;
  }

  .page-faq .faq-next__inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-manual {
    display: grid;
    grid-template-columns: var(--faq-toc-width) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 72px);
    align-items: start;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: calc(var(--header-bar-h) + var(--header-nav-h) + 28px);
  }

  .page-faq .faq-fig-row {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    gap: 26px;
    align-items: start;
  }
}