/* ===== 页面作用域：page-faq ===== */
.page-faq {
  --faq-lime: #B7FF3F;
  --faq-blue: #00E5FF;
  --faq-clay: #FF6B4A;
  --faq-cream: #F2EFE7;
  --faq-mist: #A0A8A3;
  --faq-ink: #0B0F0E;
  --faq-rock: #1A1D1B;
  --faq-pine: #0E3B3C;
  --faq-line: rgba(242, 239, 231, 0.1);
  --faq-card-gap: clamp(1rem, 2vw, 1.5rem);
  position: relative;
  background: var(--faq-ink);
  color: var(--faq-cream);
  overflow-x: hidden;
}

/* ===== 首屏区域 ===== */
.page-faq .faq-hero {
  position: relative;
  padding: calc(var(--header-total) + clamp(2.5rem, 6vw, 5rem)) 0 clamp(3rem, 7vw, 6rem);
  background: var(--faq-ink);
  overflow: hidden;
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  position: relative;
  z-index: 2;
}

.page-faq .faq-hero__content {
  position: relative;
  z-index: 2;
}

.page-faq .faq-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0 0 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  color: var(--faq-lime);
  text-transform: uppercase;
}

.page-faq .faq-hero__kicker::before {
  content: "";
  width: 2rem;
  height: 2px;
  background: var(--faq-lime);
  display: inline-block;
}

.page-faq .faq-hero__title {
  margin: 0 0 1.5rem;
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--faq-cream);
  max-width: 8ch;
}

.page-faq .faq-hero__desc {
  margin: 0 0 2rem;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--faq-mist);
  max-width: 46ch;
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--faq-line);
  max-width: 42rem;
}

.page-faq .faq-hero__meta-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.page-faq .faq-hero__meta-num {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--faq-lime);
}

.page-faq .faq-hero__meta-label {
  font-size: 0.75rem;
  color: var(--faq-mist);
  letter-spacing: 0.05em;
}

.page-faq .faq-hero__visual {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__poster {
  display: block;
  width: min(62%, 300px);
  height: auto;
  margin: -1.25rem 0 0 1rem;
  border: 1px solid rgba(242, 239, 231, 0.18);
  box-shadow: 8px 10px 0 rgba(183, 255, 63, 0.06);
  transform: rotate(-1.8deg);
  background: var(--faq-rock);
  position: relative;
  z-index: 2;
}

.page-faq .faq-hero__frame {
  position: relative;
  width: 100%;
  aspect-ratio: 3 / 2;
  background: var(--faq-ink);
  border: 1px solid var(--faq-line);
  padding: 1rem;
  transform: rotate(1.2deg);
  box-shadow: 12px 14px 0 rgba(183, 255, 63, 0.06);
}

.page-faq .faq-hero__frame::before {
  content: "";
  position: absolute;
  inset: 0.5rem;
  border: 1px solid rgba(183, 255, 63, 0.25);
  pointer-events: none;
}

.page-faq .faq-hero__frame-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(183, 255, 63, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(183, 255, 63, 0.06) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
}

.page-faq .faq-hero__svg {
  position: relative;
  width: 100%;
  height: auto;
  display: block;
}

.page-faq .faq-hero__frame-label {
  position: absolute;
  bottom: -0.65rem;
  right: 1.5rem;
  background: var(--faq-lime);
  color: var(--faq-ink);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  padding: 0.3rem 0.6rem;
  font-weight: 700;
}

.page-faq .faq-hero__diagonal {
  position: absolute;
  right: -10%;
  top: 0;
  width: 60%;
  height: 100%;
  background: linear-gradient(115deg, transparent 0%, transparent 45%, rgba(0, 229, 255, 0.05) 100%);
  pointer-events: none;
  transform: skewX(-12deg);
  z-index: 0;
}

/* ===== 内容地图 ===== */
.page-faq .faq-index {
  padding: clamp(3rem, 6vw, 5rem) 0;
  position: relative;
  background: var(--faq-ink);
}

.page-faq .faq-index::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(242, 239, 231, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(242, 239, 231, 0.025) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.page-faq .faq-index__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-card-gap);
  margin-top: 2rem;
  position: relative;
  z-index: 1;
}

.page-faq .faq-index-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  grid-template-rows: auto auto;
  align-items: center;
  column-gap: 1rem;
  padding: 1.25rem 1.25rem;
  background: var(--faq-rock);
  border: 1px solid var(--faq-line);
  border-left: 4px solid var(--faq-line);
  text-decoration: none;
  color: var(--faq-cream);
  transition: transform var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
  position: relative;
}

.page-faq .faq-index-card[data-card-theme="lime"]:hover {
  border-left-color: var(--faq-lime);
  transform: translateX(-4px);
  background: #1f2420;
}

.page-faq .faq-index-card[data-card-theme="blue"]:hover {
  border-left-color: var(--faq-blue);
  transform: translateX(-4px);
  background: #1a2225;
}

.page-faq .faq-index-card[data-card-theme="clay"]:hover {
  border-left-color: var(--faq-clay);
  transform: translateX(-4px);
  background: #231e1c;
}

.page-faq .faq-index-card__num {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--faq-lime);
  grid-row: 1 / -1;
}

.page-faq .faq-index-card[data-card-theme="blue"] .faq-index-card__num {
  color: var(--faq-blue);
}

.page-faq .faq-index-card[data-card-theme="clay"] .faq-index-card__num {
  color: var(--faq-clay);
}

.page-faq .faq-index-card__title {
  grid-column: 2;
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-faq .faq-index-card__desc {
  grid-column: 2;
  font-size: 0.8rem;
  color: var(--faq-mist);
  margin-top: 0.15rem;
}

.page-faq .faq-index-card__arrow {
  grid-column: 3;
  grid-row: 1 / -1;
  font-size: 1.25rem;
  color: var(--faq-mist);
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.page-faq .faq-index-card:hover .faq-index-card__arrow {
  color: var(--faq-lime);
  transform: translate(2px, 2px);
}

/* ===== 筛选栏 ===== */
.page-faq .faq-main {
  padding: 0 0 clamp(3rem, 6vw, 5rem);
  position: relative;
}

.page-faq .faq-main__toolbar {
  margin-bottom: 2rem;
}

.page-faq .faq-main__toolbar-left {
  margin-bottom: 0.75rem;
}

.page-faq .faq-main__toolbar-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--faq-mist);
  text-transform: uppercase;
}

.page-faq .faq-main [data-filter-group] {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-faq .faq-main .site-filter-btn {
  background: transparent;
  border: 1px solid var(--faq-line);
  color: var(--faq-mist);
  padding: 0.5rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.page-faq .faq-main .site-filter-btn[data-active="true"] {
  background: var(--faq-lime);
  border-color: var(--faq-lime);
  color: var(--faq-ink);
  font-weight: 700;
}

.page-faq .faq-main .site-filter-btn:not([data-active="true"]):hover {
  border-color: var(--faq-lime);
  color: var(--faq-cream);
}

/* ===== 手风琴区 ===== */
.page-faq .faq-accordion {
  display: flex;
  flex-direction: column;
  gap: clamp(2.5rem, 5vw, 4rem);
}

.page-faq .faq-block {
  position: relative;
  padding-top: 1rem;
}

.page-faq .faq-block__heading {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 1.25rem;
  position: sticky;
  top: calc(var(--header-total) + 0.5rem);
  background: rgba(11, 15, 14, 0.92);
  backdrop-filter: blur(6px);
  padding: 0.5rem 0;
  z-index: 5;
}

.page-faq .faq-block__index {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--faq-lime);
}

.page-faq .faq-block__rule {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, rgba(183, 255, 63, 0.35), transparent);
  min-width: 2rem;
}

.page-faq .faq-block__title {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 0;
  white-space: nowrap;
}

.page-faq .faq-block__count {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--faq-mist);
  border: 1px solid var(--faq-line);
  padding: 0.2rem 0.5rem;
  white-space: nowrap;
}

.page-faq .faq-block__list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.page-faq .faq-block__media {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-top: 1rem;
  padding: 0.75rem;
  background: var(--faq-rock);
  border: 1px solid var(--faq-line);
  border-left: 4px solid var(--faq-clay);
}

.page-faq .faq-block__media-img {
  display: block;
  width: 26%;
  max-width: 150px;
  height: auto;
  flex-shrink: 0;
  border: 1px solid rgba(255, 107, 74, 0.3);
}

.page-faq .faq-block__media-caption {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.8;
  letter-spacing: 0.12em;
  color: var(--faq-mist);
  border-left: 1px solid rgba(255, 107, 74, 0.4);
  padding-left: 1rem;
}

/* ===== 问题卡片 ===== */
.page-faq .faq-card {
  background: var(--faq-rock);
  border: 1px solid var(--faq-line);
  border-left-width: 3px;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  position: relative;
}

.page-faq .faq-card[data-theme="lime"] {
  border-left-color: var(--faq-lime);
}

.page-faq .faq-card[data-theme="blue"] {
  border-left-color: var(--faq-blue);
}

.page-faq .faq-card[data-theme="clay"] {
  border-left-color: var(--faq-clay);
}

.page-faq .faq-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 0 rgba(0, 0, 0, 0.25);
}

.page-faq .faq-card__header {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 1rem 1rem 0.9rem;
  cursor: pointer;
  user-select: none;
  min-height: 3.5rem;
}

.page-faq .faq-card__qnum {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--faq-lime);
  letter-spacing: 0.08em;
  flex-shrink: 0;
  border: 1px solid rgba(183, 255, 63, 0.3);
  padding: 0.2rem 0.475rem;
}

.page-faq .faq-card[data-theme="blue"] .faq-card__qnum {
  color: var(--faq-blue);
  border-color: rgba(0, 229, 255, 0.3);
}

.page-faq .faq-card[data-theme="clay"] .faq-card__qnum {
  color: var(--faq-clay);
  border-color: rgba(255, 107, 74, 0.3);
}

.page-faq .faq-card__question {
  flex: 1;
  font-size: 0.95rem;
  font-weight: 500;
  line-height: 1.5;
  color: var(--faq-cream);
  margin: 0;
}

.page-faq .faq-card__toggle {
  background: none;
  border: 1px solid var(--faq-line);
  width: 2rem;
  height: 2rem;
  flex-shrink: 0;
  cursor: pointer;
  display: grid;
  place-items: center;
  padding: 0;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.page-faq .faq-card__toggle-icon {
  position: relative;
  width: 0.75rem;
  height: 0.75rem;
  display: block;
}

.page-faq .faq-card__toggle-icon::before,
.page-faq .faq-card__toggle-icon::after {
  content: "";
  position: absolute;
  background: var(--faq-cream);
  transition: transform var(--transition-mid), background var(--transition-fast);
}

.page-faq .faq-card__toggle-icon::before {
  top: 50%;
  left: 0;
  width: 100%;
  height: 2px;
  transform: translateY(-50%);
}

.page-faq .faq-card__toggle-icon::after {
  left: 50%;
  top: 0;
  width: 2px;
  height: 100%;
  transform: translateX(-50%);
}

.page-faq .faq-card[data-expanded="true"] .faq-card__toggle-icon::after {
  transform: translateX(-50%) scaleY(0);
}

.page-faq .faq-card[data-expanded="true"] .faq-card__toggle {
  border-color: var(--faq-lime);
}

.page-faq .faq-card[data-theme="blue"][data-expanded="true"] .faq-card__toggle {
  border-color: var(--faq-blue);
}

.page-faq .faq-card[data-theme="clay"][data-expanded="true"] .faq-card__toggle {
  border-color: var(--faq-clay);
}

/* 解答区 */
.page-faq .faq-card__answer {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--transition-mid);
}

.page-faq .faq-card[data-expanded="true"] .faq-card__answer {
  grid-template-rows: 1fr;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-card__answer-inner {
  overflow: hidden;
  padding: 0 1rem 0 1rem;
}

.page-faq .faq-card__answer-body {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  padding: 1.25rem 0 1.5rem 0;
  position: relative;
}

.page-faq .faq-card__answer-body::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.25rem;
  bottom: 1.5rem;
  width: 2px;
  background: currentColor;
  opacity: 0.2;
}

.page-faq .faq-card__answer-num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--faq-lime);
  border-bottom: 2px solid var(--faq-lime);
  padding-bottom: 0.15rem;
  flex-shrink: 0;
  letter-spacing: 0.06em;
}

.page-faq .faq-card[data-theme="blue"] .faq-card__answer-num {
  color: var(--faq-blue);
  border-bottom-color: var(--faq-blue);
}

.page-faq .faq-card[data-theme="clay"] .faq-card__answer-num {
  color: var(--faq-clay);
  border-bottom-color: var(--faq-clay);
}

.page-faq .faq-card__answer-body p {
  margin: 0 0 0.75rem;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--faq-mist);
  max-width: 60ch;
}

.page-faq .faq-card__answer-visual {
  display: none;
}

/* ===== 底部联系区 ===== */
.page-faq .faq-contact {
  position: relative;
  padding: clamp(3rem, 6vw, 5rem) 0;
  background: var(--faq-ink);
  border-top: 1px solid var(--faq-line);
  overflow: hidden;
}

.page-faq .faq-contact::before {
  content: "";
  position: absolute;
  width: 40%;
  height: 100%;
  right: -10%;
  top: 0;
  background: linear-gradient(180deg, rgba(0, 229, 255, 0.06), transparent 70%);
  transform: skewX(-14deg);
  pointer-events: none;
}

.page-faq .faq-contact__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  position: relative;
  z-index: 1;
}

.page-faq .faq-contact__kicker {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--faq-lime);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
}

.page-faq .faq-contact__title {
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
}

.page-faq .faq-contact__desc {
  color: var(--faq-mist);
  line-height: 1.7;
  margin: 0 0 1.5rem;
  max-width: 46ch;
}

.page-faq .faq-contact__link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--faq-blue);
  font-size: 0.9rem;
  text-decoration: none;
  margin-left: 1rem;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-fast);
}

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

.page-faq .faq-contact__channels {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1.5rem;
  background: var(--faq-rock);
  border: 1px solid var(--faq-line);
}

.page-faq .faq-contact__channel {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-contact__channel:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.page-faq .faq-contact__channel-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  color: var(--faq-lime);
  text-transform: uppercase;
}

.page-faq .faq-contact__channel-value {
  font-size: 0.9rem;
  color: var(--faq-cream);
  line-height: 1.5;
  word-break: break-all;
}

.page-faq .faq-contact .site-btn--primary {
  display: inline-flex;
  align-items: center;
  padding: 0.8rem 1.25rem;
}

/* ===== 宽屏适配（>=768px） ===== */
@media (min-width: 768px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
    gap: 3rem;
  }

  .page-faq .faq-hero__frame {
    transform: rotate(1.2deg) translateX(1rem);
  }

  .page-faq .faq-index__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-faq .faq-main [data-filter-group] {
    gap: 0.75rem;
  }

  .page-faq .faq-card__header {
    padding: 1.15rem 1.25rem 1rem;
  }

  .page-faq .faq-card__question {
    font-size: 1rem;
  }

  .page-faq .faq-card__answer-inner {
    padding: 0 1.5rem 0 1.5rem;
  }

  .page-faq .faq-card__answer-body p {
    font-size: 0.95rem;
  }

  .page-faq .faq-card__answer-visual {
    display: block;
    width: 200px;
    flex-shrink: 0;
  }

  .page-faq .faq-card__answer-body {
    display: grid;
    grid-template-columns: 1fr 200px;
    gap: 2rem;
    align-items: center;
  }

  .page-faq .faq-card__svg {
    width: 100%;
    height: auto;
    display: block;
    border: 1px solid var(--faq-line);
    background: #101513;
    padding: 0.5rem;
  }

  .page-faq .faq-block__media {
    padding: 1.25rem;
    gap: 1.75rem;
  }

  .page-faq .faq-block__media-img {
    width: 170px;
    max-width: none;
  }

  .page-faq .faq-contact__grid {
    grid-template-columns: 7fr 5fr;
    gap: 3rem;
    align-items: center;
  }
}

/* 桌面端增强 */
@media (min-width: 1024px) {
  .page-faq .faq-hero {
    padding-bottom: clamp(4rem, 8vw, 7rem);
  }

  .page-faq .faq-index__grid {
    grid-template-columns: repeat(5, 1fr);
    gap: 1rem;
  }

  .page-faq .faq-index-card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1.25rem 1rem 1rem;
    min-height: 12rem;
    justify-content: space-between;
  }

  .page-faq .faq-index-card__num {
    font-size: 2rem;
  }

  .page-faq .faq-index-card__desc {
    margin-top: 0;
  }

  .page-faq .faq-index-card__arrow {
    align-self: flex-end;
    margin-top: 0.5rem;
  }

  .page-faq .faq-card__header {
    padding: 1.15rem 1.5rem 1rem;
  }

  .page-faq .faq-card__answer-inner {
    padding: 0 1.5rem 0 1.5rem;
  }

  .page-faq .faq-card__answer-body {
    grid-template-columns: 1fr 220px;
  }

  .page-faq .faq-block__heading {
    margin-bottom: 1.5rem;
    padding: 0.75rem 0;
  }
}

/* 动效降级 */
@media (prefers-reduced-motion: reduce) {
  .page-faq * {
    transition: none !important;
    animation: none !important;
  }
}