.faq-hero {
  position: relative;
  min-height: 610px;
  overflow: hidden;
  border-bottom: var(--line-thin) solid var(--color-border);
  background:
    linear-gradient(112deg, var(--color-bg) 0%, var(--color-bg) 48%, var(--color-transparent) 72%),
    repeating-linear-gradient(90deg, var(--color-transparent) 0 70px, var(--color-grid-strong) 70px 71px),
    var(--color-panel);
}

.faq-hero::before {
  position: absolute;
  top: 0;
  right: -8%;
  width: 58%;
  height: 5px;
  content: "";
  transform: skewX(-38deg);
  background: var(--color-accent);
  box-shadow: var(--shadow-accent);
}

.faq-hero::after {
  position: absolute;
  right: -7%;
  bottom: -120px;
  width: 58%;
  height: 330px;
  content: "";
  border-top: var(--line-thin) solid var(--color-border);
  clip-path: polygon(12% 0, 100% 0, 84% 100%, 0 100%);
  background:
    repeating-linear-gradient(90deg, var(--color-metal-dark) 0 6px, var(--color-panel-2) 6px 10px);
}

.faq-hero-grid {
  min-height: 610px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.8fr);
  align-items: center;
  gap: clamp(36px, 7vw, 100px);
}

.faq-hero-grid > * {
  min-width: 0;
}

.faq-hero-copy {
  position: relative;
  z-index: 2;
  padding-top: 70px;
  padding-bottom: 70px;
}

.faq-hero-copy h1 {
  max-width: 850px;
  margin-bottom: 24px;
}

.faq-hero-summary {
  max-width: 710px;
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: 1rem;
}

.faq-hero-actions {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.faq-diagnostic {
  position: relative;
  z-index: 3;
  min-width: 0;
  border: var(--line-medium) solid var(--color-border);
  background:
    linear-gradient(145deg, var(--color-silver-alpha), var(--color-transparent) 38%),
    var(--color-panel);
  clip-path: polygon(18px 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%, 0 18px);
  box-shadow: var(--shadow-device);
}

.faq-diagnostic::before {
  position: absolute;
  top: 0;
  left: 18px;
  width: 42%;
  height: 4px;
  content: "";
  background: var(--color-accent);
}

.faq-diagnostic-head {
  min-height: 60px;
  padding: 12px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  border-bottom: var(--line-thin) solid var(--color-border);
  color: var(--color-text-muted);
  background: var(--color-panel-2);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
}

.diagnostic-steps {
  margin: 0;
  padding: 12px 24px 24px;
  list-style: none;
}

.diagnostic-steps li {
  position: relative;
  min-width: 0;
  padding: 18px 0;
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  align-items: center;
  gap: 15px;
  border-bottom: var(--line-thin) solid var(--color-metal-alpha);
}

.diagnostic-steps li:last-child {
  border-bottom: 0;
}

.diagnostic-steps li:not(:last-child)::after {
  position: absolute;
  bottom: -8px;
  left: 23px;
  width: var(--line-thin);
  height: 16px;
  content: "";
  background: var(--color-accent);
}

.diagnostic-index {
  width: 48px;
  height: 40px;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  border: var(--line-thin) solid var(--color-border);
  color: var(--color-accent);
  background: var(--color-black);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.diagnostic-steps strong,
.diagnostic-steps small {
  display: block;
}

.diagnostic-steps strong {
  margin-bottom: 2px;
}

.diagnostic-steps small {
  font-size: 0.78rem;
}

.faq-index {
  padding-top: clamp(64px, 8vw, 100px);
  padding-bottom: 20px;
}

.faq-index > h2 {
  margin-bottom: 14px;
}

.faq-index > .muted {
  max-width: 720px;
  margin-bottom: 30px;
}

.faq-index .toc-tabs {
  top: calc(var(--header-height) + 10px);
}

.faq-category {
  padding-top: clamp(70px, 9vw, 116px);
  padding-bottom: 20px;
}

.faq-category-head {
  margin-bottom: 34px;
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(280px, 0.65fr);
  align-items: end;
  gap: 36px;
}

.faq-category-head > * {
  min-width: 0;
}

.faq-category-head h2 {
  margin-bottom: 0;
}

.faq-category-head > p {
  margin-bottom: 5px;
  padding-left: 22px;
  border-left: 3px solid var(--color-accent);
  color: var(--color-text-muted);
}

.faq-category .faq-list {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: start;
}

.faq-category .faq-item {
  min-width: 0;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
}

.faq-category .faq-item[open] {
  background:
    linear-gradient(115deg, var(--color-accent-soft), var(--color-transparent) 48%),
    var(--color-panel);
}

.faq-category .faq-item summary {
  align-items: flex-start;
}

.faq-category .faq-answer {
  line-height: 1.82;
}

.faq-next {
  margin-top: clamp(70px, 9vw, 120px);
  margin-bottom: clamp(64px, 9vw, 120px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 40px;
  border-color: var(--color-accent-dark);
  background:
    linear-gradient(110deg, var(--color-accent-soft), var(--color-transparent) 54%),
    var(--color-panel);
}

.faq-next > * {
  min-width: 0;
}

.faq-next h2 {
  margin-bottom: 12px;
}

.faq-next p:last-child {
  margin-bottom: 0;
}

.faq-next-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

@media (max-width: 900px) {
  .faq-hero-grid {
    grid-template-columns: 1fr;
    padding-top: 20px;
    padding-bottom: 72px;
  }

  .faq-hero-copy {
    padding-top: 54px;
    padding-bottom: 0;
  }

  .faq-diagnostic {
    width: min(100%, 620px);
  }

  .faq-category .faq-list {
    grid-template-columns: 1fr;
  }

  .faq-next {
    grid-template-columns: 1fr;
  }

  .faq-next-actions {
    justify-content: flex-start;
  }
}

@media (max-width: 640px) {
  .faq-hero,
  .faq-hero-grid {
    min-height: auto;
  }

  .faq-hero::after {
    display: none;
  }

  .faq-hero-grid {
    gap: 32px;
    padding-bottom: 56px;
  }

  .faq-hero-copy {
    padding-top: 38px;
  }

  .faq-hero-copy h1 {
    margin-bottom: 19px;
  }

  .faq-hero-actions {
    flex-direction: column;
  }

  .faq-hero-actions .btn {
    width: 100%;
  }

  .faq-diagnostic-head {
    padding-inline: 14px;
  }

  .diagnostic-steps {
    padding-right: 16px;
    padding-left: 16px;
  }

  .faq-index .toc-tabs {
    top: 6px;
  }

  .faq-category {
    padding-top: 64px;
  }

  .faq-category-head {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .faq-category-head > p {
    padding-left: 15px;
  }

  .faq-next {
    gap: 25px;
  }

  .faq-next-actions {
    flex-direction: column;
  }

  .faq-next-actions .btn {
    width: 100%;
  }
}