.page-faq {
  --faq-rail-bg: #0A2E3D;
  --faq-card-bg: #0B0F19;
  --faq-wine: #5E2B3D;
  --faq-indigo: #3D2B5E;
  --faq-green: #39FF14;
  --faq-blue: #2AF5FF;
  --faq-yellow: #FFC107;
  --faq-text: #F5F7FA;
  --faq-muted: #A0A5B0;
  --faq-line: rgba(255, 255, 255, 0.1);
  --faq-font-head: "Roboto Condensed", "Noto Sans SC", "PingFang SC", sans-serif;
  --faq-font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --faq-font-mono: "Roboto Mono", Consolas, monospace;
  background: var(--faq-card-bg);
  min-height: 100vh;
}

.page-faq .faq-shell {
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: var(--page-max, 1560px);
  margin: 0 auto;
  padding: calc(var(--header-h, 96px) + 24px) 20px 60px;
}

.page-faq .faq-rail {
  width: 100%;
  margin-bottom: 32px;
  background: linear-gradient(135deg, rgba(10, 46, 61, 0.95) 0%, rgba(11, 15, 25, 0.98) 100%);
  border: 1px solid var(--faq-line);
  border-left: 3px solid var(--faq-green);
  padding: 28px 24px;
  position: relative;
  overflow: hidden;
}

.page-faq .faq-rail::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 120px;
  height: 120px;
  background: radial-gradient(circle, rgba(42, 245, 255, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.page-faq .faq-rail__tag {
  display: inline-block;
  font-family: var(--faq-font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--faq-green);
  text-transform: uppercase;
  margin-bottom: 12px;
  padding-bottom: 4px;
  border-bottom: 1px solid rgba(57, 255, 20, 0.4);
}

.page-faq .faq-rail__title {
  font-family: var(--faq-font-head);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--faq-text);
  margin: 0 0 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  align-items: baseline;
}

.page-faq .faq-rail__title em {
  font-style: normal;
  font-size: 0.6em;
  color: var(--faq-blue);
  transform: skewX(-8deg);
  display: inline-block;
  letter-spacing: 0.08em;
}

.page-faq .faq-rail__desc {
  font-family: var(--faq-font-body);
  font-size: 13px;
  line-height: 1.8;
  color: var(--faq-muted);
  margin: 0 0 24px;
  max-width: 42ch;
}

.page-faq .faq-rail__categories {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 24px;
}

.page-faq .faq-cat {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--faq-line);
  border-radius: 50px;
  cursor: pointer;
  font-family: var(--faq-font-body);
  font-size: 13px;
  color: var(--faq-text);
  transition: all 0.2s ease;
  text-align: left;
}

.page-faq .faq-cat:hover {
  border-color: var(--faq-blue);
  color: var(--faq-blue);
}

.page-faq .faq-cat.is-active {
  background: rgba(42, 245, 255, 0.12);
  border-color: var(--faq-blue);
  color: var(--faq-blue);
  box-shadow: 0 0 16px rgba(42, 245, 255, 0.15) inset;
}

.page-faq .faq-cat__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--faq-muted);
  flex-shrink: 0;
}

.page-faq .faq-cat.is-active .faq-cat__dot {
  background: var(--faq-green);
  box-shadow: 0 0 6px var(--faq-green);
}

.page-faq .faq-cat__count {
  font-family: var(--faq-font-mono);
  font-size: 11px;
  color: var(--faq-yellow);
  margin-left: 4px;
}

.page-faq .faq-cat.is-active .faq-cat__count {
  color: var(--faq-green);
}

.page-faq .faq-rail__stat {
  border-top: 1px solid var(--faq-line);
  padding-top: 16px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}

.page-faq .faq-rail__stat-line {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-faq .faq-rail__stat-label {
  font-family: var(--faq-font-body);
  font-size: 10px;
  color: var(--faq-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.page-faq .faq-rail__stat .mono-num {
  font-family: var(--faq-font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--faq-yellow);
}

.page-faq .breadcrumb {
  margin: 0;
}

.page-faq .breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin: 0;
  padding: 0;
}

.page-faq .breadcrumb li {
  font-family: var(--faq-font-body);
  font-size: 12px;
  color: var(--faq-muted);
}

.page-faq .breadcrumb li + li::before {
  content: "/";
  margin-right: 6px;
  color: var(--faq-blue);
  font-family: var(--faq-font-mono);
}

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

.page-faq .breadcrumb a:hover {
  text-decoration: underline;
}

.page-faq .breadcrumb__current {
  color: var(--faq-text) !important;
}

.page-faq .faq-content {
  width: 100%;
}

.page-faq .faq-content__head {
  padding: 12px 4px 24px;
  border-bottom: 1px solid var(--faq-line);
  margin-bottom: 32px;
}

.page-faq .section-head__index {
  font-family: var(--faq-font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--faq-green);
  display: block;
  margin-bottom: 8px;
}

.page-faq .section-head__title {
  font-family: var(--faq-font-head);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--faq-text);
  transform: skewX(-8deg);
  display: inline-block;
  margin: 0;
  letter-spacing: 0.02em;
}

.page-faq .faq-content__lead {
  font-family: var(--faq-font-body);
  font-size: 14px;
  line-height: 1.8;
  color: var(--faq-muted);
  margin: 12px 0 0;
}

.page-faq .faq-group {
  margin-bottom: 44px;
}

.page-faq .faq-group__bar {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--faq-blue);
  margin-bottom: 16px;
  position: relative;
}

.page-faq .faq-group__bar::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 48px;
  height: 2px;
  background: var(--faq-green);
}

.page-faq .faq-group__index {
  font-family: var(--faq-font-mono);
  font-size: 14px;
  color: var(--faq-green);
  font-weight: 700;
}

.page-faq .faq-group__title {
  font-family: var(--faq-font-head);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--faq-text);
  margin: 0;
  letter-spacing: 0.04em;
}

.page-faq .faq-group__note {
  font-family: var(--faq-font-body);
  font-size: 12px;
  color: var(--faq-muted);
}

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

.page-faq .faq-item {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--faq-line);
  border-left: 2px solid transparent;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.page-faq .faq-item:hover {
  border-left-color: var(--faq-green);
  background: rgba(255, 255, 255, 0.04);
}

.page-faq .faq-item[open] {
  border-left-color: var(--faq-blue);
  background: rgba(10, 46, 61, 0.35);
}

.page-faq .faq-item__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
  user-select: none;
}

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

.page-faq .faq-item__summary:hover .faq-item__q {
  color: var(--faq-blue);
}

.page-faq .faq-item__q {
  font-family: var(--faq-font-body);
  font-size: 15px;
  font-weight: 500;
  color: var(--faq-text);
  transition: color 0.2s;
  line-height: 1.5;
}

.page-faq .faq-item__arrow {
  font-family: var(--faq-font-mono);
  font-size: 16px;
  color: var(--faq-green);
  transform: skewX(-8deg);
  flex-shrink: 0;
  transition: transform 0.25s ease;
}

.page-faq .faq-item[open] .faq-item__arrow {
  transform: skewX(-8deg) rotate(90deg);
  color: var(--faq-blue);
}

.page-faq .faq-item__answer {
  padding: 0 20px 20px;
  border-top: 1px dashed var(--faq-line);
  margin-top: 0;
}

.page-faq .faq-item__answer p {
  font-family: var(--faq-font-body);
  font-size: 14px;
  line-height: 1.9;
  color: var(--faq-text);
  margin: 16px 0 12px;
  opacity: 0.88;
}

.page-faq .faq-item__answer .mono-num {
  font-family: var(--faq-font-mono);
  font-weight: 700;
  color: var(--faq-yellow);
}

.page-faq .faq-item__answer .btn {
  margin-top: 8px;
}

.page-faq .faq-visual {
  margin: 20px 0 0;
  padding: 20px;
  background: rgba(61, 43, 94, 0.3);
  border: 1px solid var(--faq-line);
  border-right: 3px solid var(--faq-indigo);
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: flex-start;
}

.page-faq .faq-visual .img-ratio {
  width: min(240px, 100%);
}

.page-faq .faq-visual img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  border: 1px solid var(--faq-line);
}

.page-faq .faq-visual__caption {
  font-family: var(--faq-font-body);
  font-size: 12px;
  line-height: 1.7;
  color: var(--faq-muted);
  max-width: 42ch;
}

.page-faq .faq-metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  padding: 28px 0;
  border-top: 1px solid var(--faq-line);
  border-bottom: 1px solid var(--faq-line);
  margin: 40px 0;
}

.page-faq .faq-metrics__item {
  background: linear-gradient(135deg, rgba(10, 46, 61, 0.5) 0%, rgba(11, 15, 25, 0.5) 100%);
  border: 1px solid var(--faq-line);
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-faq .faq-metrics__num {
  font-family: var(--faq-font-head);
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 700;
  color: var(--faq-yellow);
  transform: skewX(-8deg);
  display: inline-block;
}

.page-faq .faq-metrics__label {
  font-family: var(--faq-font-mono);
  font-size: 11px;
  color: var(--faq-muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.page-faq .faq-guide {
  display: flex;
  flex-direction: column;
  gap: 28px;
  padding: 36px 0;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-guide__intro {
  font-family: var(--faq-font-body);
  font-size: 14px;
  line-height: 1.8;
  color: var(--faq-muted);
  margin: 12px 0 20px;
}

.page-faq .faq-guide__list {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-faq .faq-guide__item {
  display: flex;
  gap: 14px;
  padding: 16px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--faq-line);
  border-left: 3px solid var(--faq-green);
  transition: transform 0.2s ease;
}

.page-faq .faq-guide__item:hover {
  transform: translateX(4px);
}

.page-faq .faq-guide__num {
  font-family: var(--faq-font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--faq-blue);
  flex-shrink: 0;
}

.page-faq .faq-guide__text strong {
  font-family: var(--faq-font-body);
  font-size: 15px;
  color: var(--faq-text);
  display: block;
  margin-bottom: 4px;
}

.page-faq .faq-guide__text p {
  font-family: var(--faq-font-body);
  font-size: 13px;
  line-height: 1.8;
  color: var(--faq-muted);
  margin: 0;
}

.page-faq .faq-guide__visual {
  margin: 0;
  padding: 20px;
  background: rgba(93, 43, 61, 0.25);
  border: 1px solid var(--faq-line);
  border-right: 3px solid var(--faq-wine);
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: flex-start;
}

.page-faq .faq-guide__visual .img-ratio {
  width: min(320px, 100%);
}

.page-faq .faq-guide__visual img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  border: 1px solid var(--faq-line);
}

.page-faq .faq-contact-note {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 20px;
  background: rgba(42, 245, 255, 0.05);
  border: 1px solid rgba(42, 245, 255, 0.25);
  margin-top: 40px;
}

.page-faq .faq-contact-note__icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--faq-font-head);
  font-weight: 700;
  font-size: 14px;
  color: var(--faq-green);
  background: rgba(57, 255, 20, 0.1);
  border: 1px solid var(--faq-green);
  transform: skewX(-8deg);
}

.page-faq .faq-contact-note__text {
  font-family: var(--faq-font-body);
  font-size: 13px;
  line-height: 1.8;
  color: var(--faq-muted);
  margin: 0;
}

.page-faq .faq-contact-note__text a {
  color: var(--faq-blue);
  text-decoration: none;
  border-bottom: 1px dashed var(--faq-blue);
}

.page-faq .faq-contact-note__text a:hover {
  color: var(--faq-green);
  border-bottom-color: var(--faq-green);
}

.page-faq .btn--primary {
  display: inline-block;
  padding: 12px 24px;
  background: var(--faq-green);
  color: #061012;
  font-family: var(--faq-font-head);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border: 0;
  transform: skewX(-8deg);
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  box-shadow: 0 0 0 rgba(57, 255, 20, 0);
}

.page-faq .btn--primary:hover {
  transform: skewX(-8deg) translateY(-2px);
  box-shadow: 0 4px 20px rgba(57, 255, 20, 0.3);
}

.page-faq .btn--ghost {
  display: inline-block;
  padding: 10px 18px;
  background: transparent;
  color: var(--faq-blue);
  border: 1px solid var(--faq-blue);
  font-family: var(--faq-font-head);
  font-weight: 500;
  font-size: 13px;
  letter-spacing: 0.06em;
  transform: skewX(-8deg);
  text-decoration: none;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
}

.page-faq .btn--ghost:hover {
  background: rgba(42, 245, 255, 0.12);
  color: var(--faq-text);
}

@media screen and (min-width: 900px) {
  .page-faq .faq-shell {
    flex-direction: row;
    align-items: flex-start;
    gap: 32px;
    padding: calc(var(--header-h, 96px) + 40px) var(--page-gutter, 32px) 80px;
  }

  .page-faq .faq-rail {
    width: 30%;
    min-width: 280px;
    margin-bottom: 0;
    position: sticky;
    top: calc(var(--header-h, 96px) + 32px);
    padding: 32px 28px;
  }

  .page-faq .faq-rail__categories {
    flex-direction: column;
    align-items: stretch;
  }

  .page-faq .faq-cat {
    border-radius: 0;
    border-left: 3px solid transparent;
    justify-content: flex-start;
    padding: 14px 16px;
  }

  .page-faq .faq-cat.is-active {
    border-left-color: var(--faq-green);
    background: rgba(42, 245, 255, 0.08);
  }

  .page-faq .faq-cat__name {
    flex: 1;
  }

  .page-faq .faq-content {
    width: 70%;
  }

  .page-faq .faq-metrics {
    grid-template-columns: repeat(4, 1fr);
  }

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

  .page-faq .faq-guide__content {
    flex: 1;
  }

  .page-faq .faq-guide__visual {
    width: min(420px, 42%);
    margin-top: 20px;
  }

  .page-faq .faq-visual {
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
  }

  .page-faq .faq-visual .img-ratio {
    width: 160px;
  }
}

@media screen and (min-width: 1200px) {
  .page-faq .faq-rail {
    padding: 40px 36px;
  }

  .page-faq .faq-rail__title {
    font-size: 2.4rem;
  }

  .page-faq .faq-item__summary {
    padding: 20px 24px;
  }

  .page-faq .faq-item__answer {
    padding: 0 24px 24px;
    border-top: 1px dashed var(--faq-line);
    margin-top: 0;
  }

  .page-faq .faq-metrics__item {
    padding: 24px 20px;
  }
}