.page-faq {
  background: var(--c-space);
  color: var(--c-white);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

/* ===== Hero 区 ===== */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 32px 0 0;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -70px;
  right: -70px;
  width: 280px;
  height: 280px;
  background: linear-gradient(135deg, rgba(0, 255, 136, 0.08), rgba(255, 107, 53, 0.12));
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  bottom: 60px;
  left: -40px;
  width: 160px;
  height: 160px;
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.08), transparent);
  clip-path: polygon(0 0, 100% 0, 0 100%);
  pointer-events: none;
}

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

.page-faq .faq-crumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 28px;
  font-size: 14px;
  color: var(--c-cloud);
}

.page-faq .faq-crumb-link {
  color: var(--c-cloud);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.page-faq .faq-crumb-link:hover,
.page-faq .faq-crumb-link:focus {
  color: var(--c-neon);
}

.page-faq .faq-crumb-sep {
  color: var(--c-border);
}

.page-faq .faq-crumb-current {
  color: var(--c-white);
  font-weight: 500;
}

.page-faq .faq-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 12px;
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-neon);
}

.page-faq .faq-kicker::before {
  content: "";
  width: 18px;
  height: 4px;
  background: var(--c-neon);
  transform: skewX(-20deg);
}

.page-faq h1 {
  margin: 0 0 16px;
  font-family: var(--font-heading);
  font-size: clamp(30px, 5vw, 46px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: 0.01em;
}

.page-faq h1::after {
  content: "";
  display: block;
  width: 72px;
  height: 6px;
  margin-top: 14px;
  background: linear-gradient(90deg, var(--c-neon), var(--c-orange));
  transform: skewX(-24deg);
}

.page-faq .faq-hero-desc {
  max-width: 680px;
  margin: 0 0 20px;
  color: var(--c-cloud);
  font-size: 16px;
  line-height: 1.7;
}

.page-faq .faq-search-box {
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 480px;
  padding: 12px 16px;
  margin-bottom: 28px;
  background: rgba(22, 39, 62, 0.7);
  border: 2px solid var(--c-border);
  color: var(--c-cloud);
  font-size: 14px;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.page-faq .faq-search-box:hover {
  border-color: var(--c-neon);
  box-shadow: var(--shadow-neon);
}

.page-faq .faq-search-icon {
  flex-shrink: 0;
  color: var(--c-neon);
}

.page-faq .faq-hero-figure {
  position: relative;
  margin: 0;
  background: var(--c-steel);
  border: 2px solid var(--c-border);
  box-shadow: var(--shadow-card);
  transform: rotate(-0.4deg);
}

.page-faq .faq-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
}

.page-faq .faq-hero-figure::after {
  content: "";
  position: absolute;
  right: -8px;
  bottom: -8px;
  width: 64px;
  height: 4px;
  background: linear-gradient(90deg, var(--c-neon), var(--c-orange));
  transform: skewX(-28deg);
}

/* ===== 主体区 ===== */
.page-faq .faq-board {
  padding: 48px 0 72px;
  background-image:
    linear-gradient(rgba(160, 180, 196, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(160, 180, 196, 0.03) 1px, transparent 1px);
  background-size: 32px 32px;
}

.page-faq .faq-board-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

/* ===== 左侧索引 ===== */
.page-faq .faq-index-inner {
  padding: 20px;
  background: rgba(22, 39, 62, 0.6);
  border: 2px solid var(--c-border);
}

.page-faq .faq-index-title {
  margin: 0 0 6px;
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 600;
}

.page-faq .faq-index-desc {
  margin: 0 0 16px;
  font-size: 13px;
  color: var(--c-cloud);
}

.page-faq .faq-cat-nav {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: thin;
  scrollbar-color: var(--c-border) transparent;
}

.page-faq .faq-cat-nav::-webkit-scrollbar {
  height: 4px;
}

.page-faq .faq-cat-nav::-webkit-scrollbar-thumb {
  background: var(--c-border);
}

.page-faq .faq-cat-link {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  padding: 12px 14px;
  background: var(--c-steel);
  border: 2px solid var(--c-border);
  border-left: 4px solid var(--c-border);
  color: var(--c-white);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: background var(--transition-base), color var(--transition-base), border-color var(--transition-base), transform var(--transition-fast);
}

.page-faq .faq-cat-link:hover,
.page-faq .faq-cat-link:focus {
  transform: translateX(2px);
}

.page-faq .faq-cat-neon {
  border-left-color: var(--c-neon);
}

.page-faq .faq-cat-orange {
  border-left-color: var(--c-orange);
}

.page-faq .faq-cat-gold {
  border-left-color: var(--c-gold);
}

.page-faq .faq-cat-cloud {
  border-left-color: var(--c-cloud);
}

.page-faq .faq-cat-neon:hover,
.page-faq .faq-cat-neon:focus {
  background: var(--c-neon);
  border-color: var(--c-neon);
  color: var(--c-space);
}

.page-faq .faq-cat-orange:hover,
.page-faq .faq-cat-orange:focus {
  background: var(--c-orange);
  border-color: var(--c-orange);
  color: var(--c-space);
}

.page-faq .faq-cat-gold:hover,
.page-faq .faq-cat-gold:focus {
  background: var(--c-gold);
  border-color: var(--c-gold);
  color: var(--c-space);
}

.page-faq .faq-cat-cloud:hover,
.page-faq .faq-cat-cloud:focus {
  background: var(--c-cloud);
  border-color: var(--c-cloud);
  color: var(--c-space);
}

.page-faq .faq-cat-num {
  font-family: var(--font-heading);
  font-size: 12px;
  font-weight: 700;
  color: var(--c-cloud);
  opacity: 0.75;
}

.page-faq .faq-cat-name {
  white-space: nowrap;
}

.page-faq .faq-cat-count {
  margin-left: auto;
  padding: 2px 8px;
  background: rgba(160, 180, 196, 0.14);
  border-radius: 10px;
  font-size: 12px;
  font-weight: 600;
  color: var(--c-cloud);
}

.page-faq .faq-cat-link:hover .faq-cat-num,
.page-faq .faq-cat-link:focus .faq-cat-num {
  color: inherit;
  opacity: 0.8;
}

.page-faq .faq-cat-link:hover .faq-cat-count,
.page-faq .faq-cat-link:focus .faq-cat-count {
  background: rgba(10, 26, 47, 0.25);
  color: inherit;
}

/* ===== 侧边卡片 ===== */
.page-faq .faq-contact-card,
.page-faq .faq-more-card {
  margin-top: 16px;
  padding: 18px;
}

.page-faq .faq-contact-card {
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.12), rgba(0, 255, 136, 0.06));
  border: 2px solid var(--c-border);
  border-left: 4px solid var(--c-orange);
}

.page-faq .faq-contact-card h3,
.page-faq .faq-more-card h3 {
  margin: 0 0 8px;
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 600;
}

.page-faq .faq-contact-card p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--c-cloud);
}

.page-faq .faq-more-card {
  background: var(--c-steel);
  border: 2px solid var(--c-border);
}

.page-faq .faq-more-card a {
  display: block;
  padding: 6px 0;
  color: var(--c-cloud);
  font-size: 14px;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast), padding-left var(--transition-fast);
}

.page-faq .faq-more-card a:hover,
.page-faq .faq-more-card a:focus {
  padding-left: 6px;
  color: var(--c-neon);
  border-bottom-color: var(--c-neon);
}

.page-faq .faq-index-figure {
  margin: 16px 0 0;
  background: var(--c-steel);
  border: 2px solid var(--c-border);
}

.page-faq .faq-index-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
}

/* ===== 右侧手风琴 ===== */
.page-faq .faq-panels {
  min-width: 0;
}

.page-faq .faq-category {
  margin-bottom: 40px;
  scroll-margin-top: 112px;
}

.page-faq .faq-category-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--c-border);
}

.page-faq .faq-cat-dot {
  width: 12px;
  height: 12px;
  flex-shrink: 0;
  transform: rotate(45deg);
}

.page-faq .faq-dot-neon {
  background: var(--c-neon);
}

.page-faq .faq-dot-orange {
  background: var(--c-orange);
}

.page-faq .faq-dot-gold {
  background: var(--c-gold);
}

.page-faq .faq-dot-cloud {
  background: var(--c-cloud);
}

.page-faq .faq-category-head h2 {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin: 0;
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 600;
}

.page-faq .faq-cat-seq {
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 700;
  margin-right: 2px;
}

.page-faq #cat-update .faq-cat-seq {
  color: var(--c-neon);
}

.page-faq #cat-maintain .faq-cat-seq {
  color: var(--c-orange);
}

.page-faq #cat-watchlist .faq-cat-seq {
  color: var(--c-gold);
}

.page-faq #cat-general .faq-cat-seq {
  color: var(--c-cloud);
}

.page-faq .faq-cat-line {
  flex: 1;
  height: 2px;
  margin-left: 4px;
  background: linear-gradient(90deg, var(--c-border), transparent);
}

/* ===== details 手风琴 ===== */
.page-faq .faq-item {
  margin-bottom: 14px;
  background: var(--c-steel);
  border: 2px solid var(--c-border);
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-fast);
}

.page-faq .faq-item:hover {
  transform: translateY(-1px);
  border-color: var(--c-neon);
}

.page-faq #cat-maintain .faq-item:hover {
  border-color: var(--c-orange);
}

.page-faq #cat-watchlist .faq-item:hover {
  border-color: var(--c-gold);
}

.page-faq #cat-general .faq-item:hover {
  border-color: var(--c-cloud);
}

.page-faq #cat-update .faq-item[open] {
  border-color: var(--c-neon);
  box-shadow: 0 0 28px rgba(0, 255, 136, 0.14);
}

.page-faq #cat-maintain .faq-item[open] {
  border-color: var(--c-orange);
  box-shadow: 0 0 28px rgba(255, 107, 53, 0.14);
}

.page-faq #cat-watchlist .faq-item[open] {
  border-color: var(--c-gold);
  box-shadow: 0 0 28px rgba(255, 215, 0, 0.12);
}

.page-faq #cat-general .faq-item[open] {
  border-color: var(--c-cloud);
  box-shadow: 0 0 28px rgba(160, 180, 196, 0.12);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  -webkit-tap-highlight-color: transparent;
  transition: background var(--transition-base);
}

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

.page-faq .faq-item summary::marker {
  content: "";
}

.page-faq .faq-item summary:hover,
.page-faq .faq-item summary:focus-visible {
  background: rgba(255, 255, 255, 0.03);
}

.page-faq .faq-q-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  background: var(--c-neon);
  color: var(--c-space);
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 800;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 5px), calc(100% - 5px) 100%, 0 100%);
}

.page-faq #cat-update .faq-q-mark {
  background: var(--c-neon);
  color: var(--c-space);
}

.page-faq #cat-maintain .faq-q-mark {
  background: var(--c-orange);
  color: var(--c-space);
}

.page-faq #cat-watchlist .faq-q-mark {
  background: var(--c-gold);
  color: var(--c-space);
}

.page-faq #cat-general .faq-q-mark {
  background: var(--c-cloud);
  color: var(--c-space);
}

.page-faq .faq-q-text {
  flex: 1;
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.45;
}

.page-faq .faq-chevron {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  color: var(--c-cloud);
  transition: transform var(--transition-base), color var(--transition-base);
}

.page-faq .faq-item[open] .faq-chevron {
  transform: rotate(180deg);
  color: var(--c-neon);
}

.page-faq .faq-answer {
  padding: 14px 18px 16px;
  background: rgba(10, 26, 47, 0.45);
  border-top: 1px dashed var(--c-border);
  border-left: 3px solid var(--c-neon);
}

.page-faq #cat-update .faq-answer {
  border-left-color: var(--c-neon);
}

.page-faq #cat-maintain .faq-answer {
  border-left-color: var(--c-orange);
}

.page-faq #cat-watchlist .faq-answer {
  border-left-color: var(--c-gold);
}

.page-faq #cat-general .faq-answer {
  border-left-color: var(--c-cloud);
}

.page-faq .faq-answer p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-cloud);
}

/* ===== 桌面端 ≥1024px ===== */
@media (min-width: 1024px) {
  .page-faq .faq-hero {
    padding: 56px 0 0;
  }

  .page-faq .faq-board {
    padding: 64px 0 96px;
  }

  .page-faq .faq-board-grid {
    grid-template-columns: 300px 1fr;
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-index-inner {
    position: sticky;
    top: 112px;
    padding: 24px;
  }

  .page-faq .faq-cat-nav {
    flex-direction: column;
    gap: 12px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-cat-link {
    width: 100%;
    flex-shrink: 1;
  }

  .page-faq .faq-cat-name {
    white-space: normal;
  }

  .page-faq .faq-category-head {
    margin-bottom: 22px;
  }

  .page-faq .faq-category-head h2 {
    font-size: 22px;
  }

  .page-faq .faq-item summary {
    padding: 18px 20px;
  }

  .page-faq .faq-q-text {
    font-size: 16px;
  }
}