/* ===== 页面作用域：.page-faq ===== */
.page-faq {
  --faq-neon-glow: rgba(0, 255, 136, 0.14);
  --faq-card-bg: rgba(255, 255, 255, 0.03);
  --faq-card-bg-hover: rgba(255, 255, 255, 0.05);
  overflow-x: hidden;
}

/* ===== Hero 区域 ===== */
.page-faq__hero {
  position: relative;
  padding: 24px 0 36px;
  overflow: hidden;
}
.page-faq__hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: -60px;
  width: 220px;
  height: 380px;
  background: linear-gradient(135deg, transparent 0%, var(--neon-glow) 100%);
  clip-path: polygon(40% 0, 100% 0, 100% 100%, 0 100%);
  opacity: 0.7;
  pointer-events: none;
}
.page-faq__hero .breadcrumbs {
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
}
.page-faq__hero-intro {
  position: relative;
  z-index: 1;
}
.page-faq__hero-intro .page-title {
  margin: 0 0 12px;
  font-size: clamp(2.2rem, 6vw, 4.2rem);
  line-height: 1.05;
  letter-spacing: 0.02em;
}
.page-faq__hero-intro .page-title__index {
  display: block;
  font-size: 0.38em;
  font-weight: 400;
  color: var(--text);
  letter-spacing: 0.06em;
  margin-top: 8px;
  font-family: var(--font-body);
}
.page-faq__hero-desc {
  max-width: 640px;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text);
  margin: 0;
}
.page-faq__hero-stats {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 28px;
}
.page-faq__hero-stat {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  padding: 16px 18px;
  background: var(--faq-card-bg);
  border: 1px solid var(--border);
  border-left: 3px solid var(--neon);
  border-radius: var(--radius-sm);
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}
.page-faq__hero-stat .num-display {
  font-size: 1.6rem;
  line-height: 1.1;
  color: var(--ink);
}
.page-faq__hero-stat span:last-child {
  font-size: 0.8rem;
  color: var(--text);
  letter-spacing: 0.04em;
}

/* ===== 问答面板 ===== */
.page-faq__panel {
  position: relative;
  display: grid;
  gap: 20px;
  padding: 28px 0 48px;
}

/* ---- 分类 radio 输入 ---- */
.page-faq__cat-input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

/* ---- 分类导航 ---- */
.page-faq__cats {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  overflow-x: auto;
  padding: 4px 2px 10px;
  scrollbar-width: thin;
  scrollbar-color: var(--neon-dim) transparent;
}
.page-faq__cats-title {
  display: none;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin: 0 0 10px;
}
.page-faq__cat {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-shrink: 0;
  padding: 9px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: transparent;
  color: var(--text);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease), color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.page-faq__cat:hover {
  border-color: var(--border-bright);
  color: var(--ink);
}
.page-faq__cat-count {
  font-family: var(--font-num);
  font-size: 0.75rem;
  line-height: 1;
  padding: 3px 6px;
  border-radius: 999px;
  background: var(--faq-card-bg);
  color: var(--text-dim);
  transition: background 0.3s var(--ease), color 0.3s var(--ease);
}
.page-faq__cats-help {
  display: none;
  margin-top: 18px;
  padding: 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-deep);
}
.page-faq__cats-help p {
  margin: 0 0 10px;
  font-size: 0.875rem;
  color: var(--text);
}

/* 分类选中态 */
#faq-cat-all:checked ~ .page-faq__cats label[for="faq-cat-all"],
#faq-cat-sync:checked ~ .page-faq__cats label[for="faq-cat-sync"],
#faq-cat-score:checked ~ .page-faq__cats label[for="faq-cat-score"],
#faq-cat-replay:checked ~ .page-faq__cats label[for="faq-cat-replay"],
#faq-cat-subscribe:checked ~ .page-faq__cats label[for="faq-cat-subscribe"],
#faq-cat-security:checked ~ .page-faq__cats label[for="faq-cat-security"] {
  background: var(--neon);
  border-color: var(--neon);
  color: var(--bg);
  box-shadow: 0 0 18px var(--neon-glow);
}
#faq-cat-all:checked ~ .page-faq__cats label[for="faq-cat-all"] .page-faq__cat-count,
#faq-cat-sync:checked ~ .page-faq__cats label[for="faq-cat-sync"] .page-faq__cat-count,
#faq-cat-score:checked ~ .page-faq__cats label[for="faq-cat-score"] .page-faq__cat-count,
#faq-cat-replay:checked ~ .page-faq__cats label[for="faq-cat-replay"] .page-faq__cat-count,
#faq-cat-subscribe:checked ~ .page-faq__cats label[for="faq-cat-subscribe"] .page-faq__cat-count,
#faq-cat-security:checked ~ .page-faq__cats label[for="faq-cat-security"] .page-faq__cat-count {
  background: rgba(11, 30, 59, 0.18);
  color: inherit;
}

/* 分类过滤逻辑 */
#faq-cat-sync:checked ~ .page-faq__list .page-faq__item:not([data-faq-cat="sync"]),
#faq-cat-score:checked ~ .page-faq__list .page-faq__item:not([data-faq-cat="score"]),
#faq-cat-replay:checked ~ .page-faq__list .page-faq__item:not([data-faq-cat="replay"]),
#faq-cat-subscribe:checked ~ .page-faq__list .page-faq__item:not([data-faq-cat="subscribe"]),
#faq-cat-security:checked ~ .page-faq__list .page-faq__item:not([data-faq-cat="security"]) {
  display: none;
}

/* ---- 搜索框 ---- */
.page-faq__search {
  position: relative;
  margin-bottom: 18px;
}
.page-faq__search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-dim);
  pointer-events: none;
}
.page-faq__search-input {
  width: 100%;
  padding: 12px 16px 12px 44px;
  background: rgba(5, 13, 26, 0.6);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.5;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.page-faq__search-input::placeholder {
  color: var(--text-dim);
}
.page-faq__search-input:focus {
  outline: none;
  border-color: var(--neon);
  box-shadow: 0 0 0 3px var(--faq-neon-glow), 0 0 20px rgba(0, 255, 136, 0.1);
}

/* ---- 手风琴问题列表 ---- */
.page-faq__accordion {
  display: grid;
  gap: 12px;
}
.page-faq__item {
  background: var(--faq-card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease), background 0.3s var(--ease);
}
.page-faq__item:hover {
  border-color: var(--border-bright);
  background: var(--faq-card-bg-hover);
}
.page-faq__item[open] {
  border-color: var(--border-bright);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.18);
}
.page-faq__question {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  list-style: none;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1.45;
  color: var(--ink);
  transition: color 0.3s var(--ease);
}
.page-faq__question::-webkit-details-marker {
  display: none;
}
.page-faq__question:hover {
  color: var(--neon);
}
.page-faq__q-num {
  font-family: var(--font-num);
  font-size: 0.78rem;
  line-height: 1;
  color: var(--neon);
  border: 1px solid var(--border-bright);
  border-radius: 6px;
  padding: 5px 6px;
  flex-shrink: 0;
  min-width: 34px;
  text-align: center;
}
.page-faq__q-text {
  flex: 1;
}
.page-faq__q-arrow {
  flex-shrink: 0;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--text-dim);
  border-bottom: 2px solid var(--text-dim);
  transform: rotate(45deg);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}
.page-faq__item[open] .page-faq__q-arrow {
  transform: rotate(-135deg);
  border-color: var(--neon);
}
.page-faq__answer {
  padding: 0 18px 18px;
  color: var(--text);
  font-size: 0.9rem;
  line-height: 1.75;
}
.page-faq__answer p {
  margin: 0 0 8px;
}
.page-faq__answer p:last-child {
  margin-bottom: 0;
}
.page-faq__answer-img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  margin-top: 14px;
  border: 1px solid var(--border);
}

/* ---- 答案抽屉 ---- */
.page-faq__drawer {
  display: grid;
  gap: 16px;
  align-content: start;
}
.page-faq__drawer-card {
  padding: 20px;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.01));
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.page-faq__drawer-card--featured {
  position: relative;
  overflow: hidden;
  border-left: 3px solid var(--neon);
}
.page-faq__drawer-card--featured::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, transparent 50%, var(--neon-dim) 100%);
  opacity: 0.4;
}
.page-faq__drawer-card h3 {
  margin: 6px 0 8px;
  font-size: 1.25rem;
  line-height: 1.3;
  color: var(--ink);
}
.page-faq__drawer-card p {
  margin: 0 0 12px;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--text);
}
.page-faq__drawer-img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  margin: 12px 0;
  border: 1px solid var(--border);
}
.page-faq__drawer-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--neon);
  text-decoration: none;
}
.page-faq__drawer-link::after {
  content: "";
  width: 6px;
  height: 6px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(-45deg);
  transition: transform 0.3s var(--ease);
}
.page-faq__drawer-link:hover::after {
  transform: rotate(-45deg) translate(3px, -3px);
}
.page-faq__drawer-text {
  font-size: 0.875rem;
}
.page-faq__drawer-btn {
  display: flex;
  justify-content: center;
  margin-top: 10px;
  width: 100%;
}
.page-faq__drawer-card--stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.page-faq__drawer-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px;
  background: var(--bg-deep);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}
.page-faq__drawer-stat .num-display {
  font-size: 1.35rem;
  color: var(--neon);
  line-height: 1.1;
}
.page-faq__drawer-stat span:last-child {
  font-size: 0.75rem;
  color: var(--text);
  line-height: 1.4;
}

/* ---- 热门问题 ---- */
.page-faq__hot {
  padding: 40px 0 56px;
}
.page-faq__hot .section-head {
  margin-bottom: 24px;
}
.page-faq__hot-card {
  padding: 24px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
}
.page-faq__hot-card h3 {
  margin: 4px 0 0;
  font-size: 1.35rem;
  line-height: 1.3;
  color: var(--ink);
}
.page-faq__hot-card p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--text);
  flex: 1;
}
.page-faq__hot-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--neon);
  text-decoration: none;
  margin-top: 6px;
}
.page-faq__hot-link::after {
  content: "";
  width: 6px;
  height: 6px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(-45deg);
  transition: transform 0.3s var(--ease);
}
.page-faq__hot-link:hover::after {
  transform: rotate(-45deg) translate(3px, -3px);
}

/* ---- 寻找答案 --- */
.page-faq__find {
  padding: 48px 0 64px;
  background:
    radial-gradient(circle at 15% 30%, rgba(0, 255, 136, 0.06), transparent 38%),
    radial-gradient(circle at 85% 70%, rgba(255, 46, 76, 0.05), transparent 30%),
    var(--bg-deep);
  border-top: 1px solid var(--border);
}
.page-faq__find-box {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}
.page-faq__find-box h2 {
  margin: 8px 0 20px;
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  line-height: 1.25;
  color: var(--ink);
}
.page-faq__find-search {
  position: relative;
  max-width: 600px;
  margin: 0 auto 18px;
}
.page-faq__find-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-dim);
  pointer-events: none;
}
.page-faq__search-input--big {
  padding: 16px 20px 16px 48px;
  font-size: 1rem;
  border-radius: 999px;
  border-width: 1.5px;
}
.page-faq__search-input--big:focus {
  border-color: var(--neon);
  box-shadow: 0 0 0 4px var(--faq-neon-glow), 0 0 32px rgba(0, 255, 136, 0.16);
}
.page-faq__find-hint {
  max-width: 520px;
  margin: 0 auto 24px;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--text-dim);
}
.page-faq__find-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

/* ===== 响应式 ===== */
@media (min-width: 640px) {
  .page-faq__hero {
    padding: 32px 0 44px;
  }
  .page-faq__hero-stats {
    grid-template-columns: repeat(4, 1fr);
    margin-top: 32px;
  }
  .page-faq__hot .grid--bento {
    gap: 18px;
  }
}

@media (min-width: 1024px) {
  .page-faq__hero {
    padding: 40px 0 56px;
  }
  .page-faq__hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 40px;
    align-items: end;
  }
  .page-faq__hero-stats {
    margin-top: 0;
  }
  .page-faq__hero-desc {
    font-size: 1.05rem;
  }

  .page-faq__panel {
    grid-template-columns: 220px 1fr 300px;
    gap: 24px;
    align-items: start;
    padding: 40px 0 64px;
  }

  .page-faq__cats {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    overflow: visible;
    position: sticky;
    top: calc(var(--header-h, 60px) + 24px);
    padding: 0;
    background: rgba(5, 13, 26, 0.5);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 12px;
  }
  .page-faq__cats-title {
    display: block;
  }
  .page-faq__cat {
    width: 100%;
    border-radius: var(--radius-sm);
    justify-content: space-between;
    padding: 10px 12px;
  }
  .page-faq__cats-help {
    display: block;
  }

  .page-faq__drawer {
    position: sticky;
    top: calc(var(--header-h, 60px) + 24px);
  }
  .page-faq__drawer-card--featured .page-faq__drawer-img {
    width: 100%;
    height: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq__hero::before,
  .page-faq__q-arrow,
  .page-faq__drawer-link::after,
  .page-faq__hot-link::after {
    transition: none;
    animation: none;
  }
}