.page-faq {
  --cat-color: var(--color-orange);
  --cat-color-alt: var(--cat-color);
  background:
    radial-gradient(circle at 90% 10%, rgba(255,77,0,0.12), transparent 32%),
    radial-gradient(circle at 10% 75%, rgba(57,255,20,0.05), transparent 28%),
    var(--color-bg);
  color: var(--color-white);
}

.page-faq :focus-visible {
  outline: 2px solid var(--color-neon);
  outline-offset: 2px;
}

.page-faq .faq-hero {
  padding: 2rem 0 0;
  overflow: hidden;
  position: relative;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 2rem;
  align-items: center;
}

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

.page-faq .faq-h1__mark {
  background: linear-gradient(135deg, var(--color-orange), var(--color-amber));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-family: var(--font-display);
  font-weight: 900;
}

.page-faq .faq-h1__sep {
  color: var(--color-neon);
  font-family: var(--font-mono);
}

.page-faq .faq-hero__lead {
  max-width: 42rem;
  margin: 1rem 0 0;
  color: var(--color-mist);
  font-size: 1rem;
  line-height: 1.7;
}

.page-faq .faq-tabs {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.page-faq .faq-tabs li {
  line-height: 1;
}

.page-faq .faq-tab {
  display: inline-flex;
  align-items: center;
  transform: skew(-6deg);
  padding: 0.6rem 0.9rem 0.55rem;
  border: 1px solid var(--color-line-strong);
  background: rgba(255,255,255,0.04);
  color: var(--color-white);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  line-height: 1.1;
  text-decoration: none;
  transition: border-color 0.25s ease, background 0.25s ease, color 0.25s ease, transform 0.25s ease;
}

.page-faq .faq-tab > span {
  display: block;
  transform: skew(6deg);
}

.page-faq .faq-tab:hover,
.page-faq .faq-tab:focus-visible {
  outline: none;
  border-color: transparent;
  background: linear-gradient(135deg, var(--cat-color) 0%, var(--cat-color-alt, var(--cat-color)) 100%);
  color: var(--color-bg-deep);
  transform: skew(-6deg) translateY(-2px);
}

.page-faq .faq-tab--watch,
.page-faq .faq-category--watch {
  --cat-color: var(--color-orange);
  --cat-color-alt: var(--color-amber);
}

.page-faq .faq-tab--devices,
.page-faq .faq-category--devices {
  --cat-color: var(--color-neon);
  --cat-color-alt: var(--color-neon);
}

.page-faq .faq-tab--subscription,
.page-faq .faq-category--subscription {
  --cat-color: var(--color-amber);
  --cat-color-alt: var(--color-orange);
}

.page-faq .faq-tab--security,
.page-faq .faq-category--security {
  --cat-color: var(--color-orange);
  --cat-color-alt: var(--color-amber);
}

.page-faq .faq-hero__visual {
  margin: 0;
  position: relative;
}

.page-faq .faq-hero__visual img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  clip-path: polygon(0 2%, 100% 0%, 98% 98%, 2% 100%);
  background: var(--color-bg-deep);
}

.page-faq .faq-hero__visual::after {
  content: "常见问题索引";
  position: absolute;
  right: 1rem;
  bottom: 1rem;
  background: rgba(5,8,18,0.82);
  color: var(--color-neon);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.25rem 0.6rem;
  border: 1px solid rgba(57,255,20,0.4);
  transform: skew(-5deg);
  pointer-events: none;
}

.page-faq .faq-layout {
  padding: 2.5rem 0 5rem;
}

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

.page-faq .faq-category {
  margin-top: 3rem;
  scroll-margin-top: 8rem;
}

.page-faq .faq-category__header {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-line);
}

.page-faq .faq-category__index {
  background: linear-gradient(135deg, var(--cat-color) 0%, var(--cat-color-alt, var(--cat-color)) 100%);
  color: var(--color-bg-deep);
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 1.25rem;
  line-height: 1;
  padding: 0.55rem 0.5rem 0.45rem;
  transform: skew(-8deg);
  min-width: 3rem;
  text-align: center;
  flex: 0 0 auto;
}

.page-faq .faq-category__header h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 3vw, 2rem);
  letter-spacing: 0.02em;
}

.page-faq .faq-category__header p {
  margin: 0.25rem 0 0;
  color: var(--color-mist);
  font-size: 0.925rem;
  line-height: 1.5;
}

.page-faq .faq-list {
  display: grid;
  gap: 0.5rem;
}

.page-faq .faq-item {
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-line);
  background: rgba(255,255,255,0.03);
  transition: border-color 0.25s ease, background 0.25s ease, transform 0.25s ease;
}

.page-faq .faq-item[open] {
  border-left-color: var(--cat-color);
  background: rgba(27,58,75,0.6);
}

.page-faq .faq-item summary {
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  padding: 1rem 1.25rem;
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.4;
  color: var(--color-white);
}

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

.page-faq .faq-item summary:hover {
  color: var(--color-white);
}

.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--cat-color);
  outline-offset: -2px;
}

.page-faq .faq-item__q {
  flex: 1 1 auto;
}

.page-faq .faq-item__icon {
  position: relative;
  flex: 0 0 16px;
  width: 16px;
  height: 16px;
  color: var(--color-mist);
  transition: color 0.25s ease;
}

.page-faq .faq-item[open] .faq-item__icon {
  color: var(--cat-color);
}

.page-faq .faq-item__icon::before,
.page-faq .faq-item__icon::after {
  content: "";
  position: absolute;
  inset: 0;
  width: 14px;
  height: 2px;
  margin: auto;
  background: currentColor;
  transition: transform 0.3s ease;
}

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

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

.page-faq .faq-item__answer {
  padding: 0 1.25rem 1.1rem;
  color: var(--color-mist);
  line-height: 1.7;
}

.page-faq .faq-item__answer p {
  margin: 0;
}

.page-faq .faq-item__answer ol {
  list-style: none;
  counter-reset: faq-step;
  margin: 0.75rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.4rem;
}

.page-faq .faq-item__answer ol li {
  counter-increment: faq-step;
  position: relative;
  padding-left: 1.75rem;
}

.page-faq .faq-item__answer ol li::before {
  content: counter(faq-step);
  position: absolute;
  left: 0;
  top: 0;
  color: var(--color-neon);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.85rem;
  line-height: 1.7;
}

.page-faq .faq-item__answer a {
  color: var(--color-amber);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 0.2s ease;
}

.page-faq .faq-item__answer a:hover {
  color: var(--color-neon);
}

.page-faq .faq-category__grid {
  display: grid;
  gap: 1.5rem;
  align-items: start;
}

.page-faq .faq-device-figure {
  margin: 0;
  position: relative;
  background: var(--color-bg-deep);
  border: 1px solid var(--color-line);
  overflow: hidden;
  aspect-ratio: 3 / 2;
}

.page-faq .faq-device-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.95) contrast(1.05);
  opacity: 0.9;
}

.page-faq .faq-device-figure figcaption {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 0.55rem 0.85rem;
  background: rgba(5,8,18,0.75);
  color: var(--color-neon);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.02em;
  transform: skew(-4deg);
  transform-origin: left bottom;
}

.page-faq .faq-layout__aside {
  margin-top: 3rem;
}

.page-faq .faq-help {
  position: relative;
  overflow: hidden;
  padding: 2rem 1.75rem;
  background: linear-gradient(160deg, var(--color-surface) 0%, rgba(27,58,75,0.6) 100%);
  border: 1px solid var(--color-line-strong);
}

.page-faq .faq-help::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(135deg, var(--color-orange), var(--color-neon));
}

.page-faq .faq-help h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
}

.page-faq .faq-help p {
  margin: 0.75rem 0 0;
  color: var(--color-mist);
  line-height: 1.6;
}

.page-faq .faq-help .btn {
  margin-top: 1.5rem;
}

@media (min-width: 640px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 2.5rem;
  }

  .page-faq .faq-hero__visual img {
    aspect-ratio: 4 / 3;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout__grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 2.5rem;
    align-items: start;
  }

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

  .page-faq .faq-layout__aside {
    margin-top: 3rem;
    position: sticky;
    top: 7rem;
  }

  .page-faq .faq-category__grid {
    grid-template-columns: minmax(0, 1fr) minmax(200px, 280px);
  }

  .page-faq .faq-device-figure {
    margin: 0;
  }

  .page-faq .faq-hero__lead {
    font-size: 1.0625rem;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .page-faq {
    scroll-behavior: smooth;
  }

  .page-faq .faq-item[open] .faq-item__answer {
    animation: faq-answer-in 0.25s ease;
  }
}

@keyframes faq-answer-in {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}