.page-faq {
  --faq-gutter: 1.25rem;
  --faq-container: min(100% - var(--faq-gutter) * 2, var(--container));
  --faq-headline: clamp(1.875rem, 4.5vw, 3.25rem);
  --faq-group-num: clamp(2.75rem, 6vw, 4.5rem);
  overflow: hidden;
}

/* ===== 页面容器 ===== */
.page-faq__container {
  width: var(--faq-container);
  margin-inline: auto;
}

/* ===== 首屏 Hero ===== */
.page-faq__hero {
  position: relative;
  padding: 2rem 0 3.5rem;
  background:
    radial-gradient(ellipse at 85% -10%, rgba(155, 77, 202, 0.24), transparent 55%),
    radial-gradient(ellipse at 5% 100%, rgba(255, 46, 108, 0.14), transparent 50%);
}

.page-faq__hero-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.page-faq__eyebrow {
  margin: 0;
  font-family: var(--font-body);
  font-size: 0.6875rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.page-faq__hero-grid {
  display: grid;
  gap: 2.5rem;
  align-items: center;
}

.page-faq__hero-copy {
  position: relative;
  z-index: 1;
}

.page-faq__hero-index {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 1rem;
  padding: 0.3rem 0.8rem;
  border: 1px solid rgba(255, 46, 108, 0.4);
  background: rgba(255, 46, 108, 0.08);
  color: var(--color-primary);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.page-faq__title {
  margin: 0 0 1.25rem;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: var(--faq-headline);
  line-height: 1.25;
  letter-spacing: 0.03em;
  color: var(--color-text);
}

.page-faq__lead {
  margin: 0 0 1.5rem;
  max-width: 52ch;
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.8;
}

.page-faq__scroll {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-accent);
  text-decoration: none;
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  border-bottom: 1px solid rgba(0, 240, 255, 0.4);
  padding-bottom: 0.25rem;
  transition: gap 0.25s var(--ease), color 0.25s var(--ease);
}

.page-faq__scroll:hover {
  gap: 0.85rem;
  color: var(--color-text);
}

/* ===== 框景 ===== */
.page-faq__frame {
  position: relative;
  padding: 1rem 1rem 1.25rem;
  background: var(--color-panel);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 1.5rem 3rem rgba(0, 0, 0, 0.45);
}

.page-faq__frame::before {
  content: "";
  position: absolute;
  inset: 0.5rem;
  border: 1px dashed rgba(255, 46, 108, 0.28);
  pointer-events: none;
  z-index: 1;
}

.page-faq__frame-img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-faq__frame-ruler {
  position: absolute;
  left: 1rem;
  right: 1rem;
  bottom: -0.25rem;
  height: 6px;
  background: repeating-linear-gradient(90deg, var(--color-accent) 0 1px, transparent 1px 9px);
  opacity: 0.35;
  z-index: 2;
}

.page-faq__frame-tag {
  position: absolute;
  top: -0.625rem;
  left: 1rem;
  z-index: 2;
  padding: 0.3125rem 0.75rem;
  background: var(--color-primary);
  color: #fff;
  font-family: var(--font-body);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

/* ===== 快速定位 ===== */
.page-faq__quicknav {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(30, 30, 30, 0.35);
}

.page-faq__quick-grid {
  display: grid;
  grid-template-columns: 1fr;
}

.page-faq__quick-item {
  --faq-quick-color: var(--color-primary);
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 0.25rem 1rem;
  padding: 1.25rem 1rem;
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: background 0.25s var(--ease);
}

.page-faq__quick-item:last-child {
  border-bottom: 0;
}

.page-faq__quick-item::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--faq-quick-color, var(--color-primary));
  opacity: 0;
  transition: opacity 0.25s var(--ease);
}

.page-faq__quick-item:hover {
  background: var(--glass-bg);
}

.page-faq__quick-item:hover::after {
  opacity: 1;
}

.page-faq__quick-item--pink {
  --faq-quick-color: var(--color-primary);
}

.page-faq__quick-item--purple {
  --faq-quick-color: var(--color-secondary);
}

.page-faq__quick-item--blue {
  --faq-quick-color: var(--color-accent);
}

.page-faq__quick-item--gold {
  --faq-quick-color: #F7DCE0;
}

.page-faq__quick-num {
  grid-row: span 2;
  font-family: var(--font-head);
  font-size: 2rem;
  font-weight: 900;
  line-height: 1;
  color: var(--faq-quick-color, var(--color-primary));
}

.page-faq__quick-label {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.9375rem;
  letter-spacing: 0.06em;
  color: var(--color-text);
}

.page-faq__quick-count {
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-muted);
}

/* ===== 问答分组 ===== */
.page-faq__group {
  position: relative;
  padding: 3.25rem 0 3.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.page-faq__group--sync {
  background: linear-gradient(180deg, rgba(255, 46, 108, 0.05), transparent 55%);
}

.page-faq__group--cast {
  background: linear-gradient(180deg, rgba(155, 77, 202, 0.06), transparent 55%);
}

.page-faq__group--time {
  background: linear-gradient(180deg, rgba(0, 240, 255, 0.04), transparent 55%);
}

.page-faq__group--danmaku {
  background: linear-gradient(180deg, rgba(247, 220, 224, 0.04), transparent 55%);
}

.page-faq__group-head {
  display: grid;
  gap: 1.25rem;
  margin-bottom: 2.25rem;
}

.page-faq__group-head::after {
  content: "";
  display: block;
  height: 4px;
  margin-top: 0.5rem;
  background: repeating-linear-gradient(90deg, var(--color-secondary) 0 2px, transparent 2px 10px);
  opacity: 0.3;
}

.page-faq__group-index {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
}

.page-faq__group-num {
  font-family: var(--font-head);
  font-size: var(--faq-group-num);
  font-weight: 900;
  line-height: 1;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-faq__group-en {
  font-family: var(--font-body);
  font-size: 0.6875rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-muted);
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
}

.page-faq__group-copy {
  position: relative;
  padding-left: 1rem;
  border-left: 2px solid var(--color-primary);
}

.page-faq__group-title {
  margin: 0 0 0.5rem;
  font-family: var(--font-head);
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  color: var(--color-text);
}

.page-faq__group-desc {
  margin: 0;
  max-width: 60ch;
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.75;
}

/* ===== 投屏区配图 ===== */
.page-faq__cast-media {
  position: relative;
  margin: 2rem 0 2.25rem;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: var(--color-panel);
  box-shadow: 0 1rem 2rem rgba(0, 0, 0, 0.35);
}

.page-faq__cast-img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-faq__cast-caption {
  position: absolute;
  right: 0;
  bottom: 0;
  padding: 0.4rem 0.9rem;
  background: rgba(10, 10, 10, 0.85);
  color: var(--color-accent);
  font-size: 0.625rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

/* ===== 弹幕区配图 ===== */
.page-faq__danmaku-media {
  margin: 0 auto 2rem;
  max-width: 400px;
  padding: 0.5rem;
  border: 1px solid rgba(255, 46, 108, 0.3);
  background: var(--color-panel);
}

.page-faq__danmaku-img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 3;
  object-fit: cover;
}

/* ===== 折叠列表 ===== */
.page-faq__list {
  display: block;
}

.page-faq__item {
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
  transition: background 0.3s var(--ease);
}

.page-faq__item:first-child {
  border-top: 1px solid rgba(255, 255, 255, 0.09);
}

.page-faq__item-head {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1.25rem 0.75rem;
  border-left: 2px solid transparent;
  cursor: pointer;
  list-style: none;
  transition: background 0.3s var(--ease);
}

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

.page-faq__item-head:hover,
.page-faq__item-head:focus-visible {
  background: var(--glass-bg);
  outline: none;
}

.page-faq__item-head:focus-visible {
  outline: 1px solid var(--color-accent);
  outline-offset: 4px;
}

.page-faq__item-num {
  flex: none;
  min-width: 2.5rem;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  font-variant-numeric: tabular-nums;
  color: var(--color-primary);
}

.page-faq__item-q {
  flex: 1;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--color-text);
}

.page-faq__item-arrow {
  flex: none;
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--color-muted);
  transition: all 0.3s var(--ease);
}

.page-faq__item-arrow svg {
  display: block;
  transition: transform 0.3s var(--ease);
}

.page-faq__item[open] {
  background: var(--glass-bg);
}

.page-faq__item[open] .page-faq__item-head {
  border-left-color: var(--color-primary);
}

.page-faq__item[open] .page-faq__item-arrow {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(255, 46, 108, 0.12);
}

.page-faq__item[open] .page-faq__item-arrow svg {
  transform: rotate(90deg);
}

.page-faq__item-answer {
  padding: 0 0.75rem 1.5rem;
  margin: 0;
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.8;
}

.page-faq__item-answer p {
  margin: 0;
  max-width: 68ch;
  border-left: 2px solid rgba(255, 46, 108, 0.5);
  padding-left: 1rem;
}

/* ===== 仍未解决 ===== */
.page-faq__support {
  position: relative;
  padding: 3.75rem 0 4.5rem;
  background: linear-gradient(180deg, rgba(155, 77, 202, 0.08), rgba(255, 46, 108, 0.1));
}

.page-faq__support-inner {
  position: relative;
  padding: 2rem 1.5rem;
  background: var(--glass-bg);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.page-faq__support-inner::before {
  content: "";
  position: absolute;
  top: 0.5rem;
  left: 0.5rem;
  right: 0.5rem;
  height: 1px;
  background: repeating-linear-gradient(90deg, var(--color-primary) 0 3px, transparent 3px 12px);
  opacity: 0.4;
}

.page-faq__support-index {
  display: inline-block;
  margin: 0 0 0.75rem;
  font-size: 0.6875rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.page-faq__support-title {
  margin: 0 0 1rem;
  font-family: var(--font-head);
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  color: var(--color-text);
}

.page-faq__support-text {
  margin: 0 0 1.75rem;
  max-width: 64ch;
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.8;
}

.page-faq__support-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ===== 响应式 ===== */
@media (min-width: 600px) {
  .page-faq__quick-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-faq__quick-item {
    border-bottom: 0;
    border-right: 1px solid rgba(255, 255, 255, 0.08);
  }

  .page-faq__support-inner {
    padding: 2.5rem;
  }
}

@media (min-width: 768px) {
  .page-faq__hero {
    padding: 3rem 0 5rem;
  }

  .page-faq__hero-grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 3rem;
  }

  .page-faq__group {
    padding: 5rem 0 5.5rem;
  }

  .page-faq__group-head {
    grid-template-columns: auto 1fr;
    align-items: end;
    gap: 0 2.5rem;
  }

  .page-faq__group-head::after {
    grid-column: 1 / -1;
    margin-top: 0;
  }

  .page-faq__group-copy {
    padding-left: 1.25rem;
  }

  .page-faq__group-title {
    font-size: 1.75rem;
  }

  .page-faq__item-head {
    padding: 1.5rem 1rem;
  }

  .page-faq__item-q {
    font-size: 1.0625rem;
  }

  .page-faq__item-answer {
    padding: 0 1rem 1.75rem 3.5rem;
  }
}

@media (min-width: 1024px) {
  .page-faq__quick-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-faq__quick-item {
    padding: 1.75rem 1.25rem;
    border-bottom: 0;
  }

  .page-faq__quick-num {
    font-size: 2.375rem;
  }

  .page-faq__support-inner {
    padding: 3rem 3.5rem;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 1rem 3rem;
  }

  .page-faq__support-index {
    grid-column: 1 / -1;
  }

  .page-faq__support-title {
    margin: 0;
  }

  .page-faq__support-text {
    margin: 0;
  }

  .page-faq__support-actions {
    grid-column: 1 / -1;
  }
}