.page-faq {
  --faq-accent: var(--magenta);
  --faq-hit-bg: rgba(255, 46, 136, 0.22);
  --faq-edge: var(--line);
  --faq-panel: var(--rock);
  padding-bottom: clamp(2.5rem, 6vw, 5rem);
}

/* ---------- 首屏 ---------- */
.page-faq .kb-hero {
  position: relative;
  padding: clamp(1.5rem, 4vw, 3rem) 0 clamp(1.25rem, 3vw, 2rem);
  border-bottom: 1px solid var(--faq-edge);
}

.page-faq .kb-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: clamp(64px, 18vw, 160px);
  height: 2px;
  background: linear-gradient(90deg, var(--magenta), var(--violet));
}

.page-faq .kb-kicker {
  margin: 0.9rem 0 0.6rem;
  font-size: 0.7rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--neon);
}

.page-faq h1 {
  margin: 0 0 1rem;
  max-width: 18ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.85rem, 5.4vw, 3.3rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--fog);
  transform: skewX(-2.5deg);
  transform-origin: left bottom;
  overflow-wrap: break-word;
}

.page-faq .lede {
  margin: 0 0 1.5rem;
  max-width: 46ch;
  font-size: clamp(0.94rem, 1.6vw, 1.05rem);
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .kb-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .kb-stat {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
  padding-right: 1.5rem;
  border-right: 1px solid var(--faq-edge);
  font-size: 0.8rem;
  color: var(--mist);
}

.page-faq .kb-stat:last-child {
  padding-right: 0;
  border-right: 0;
}

.page-faq .kb-stat .mono {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--neon);
}

/* ---------- 检索演示 ---------- */
.page-faq .kb-search {
  display: grid;
  gap: 1.1rem;
  margin: clamp(1.5rem, 3.5vw, 2.6rem) 0 clamp(1.8rem, 4vw, 3rem);
}

.page-faq .kb-search-panel {
  padding: clamp(1rem, 2.4vw, 1.5rem);
  border: 1px solid var(--faq-edge);
  border-radius: 14px;
  background:
    linear-gradient(155deg, rgba(255, 46, 136, 0.12), rgba(123, 75, 255, 0.07) 55%, rgba(5, 7, 10, 0) 88%),
    var(--faq-panel);
}

.page-faq .kb-search-title {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  color: var(--fog);
}

.page-faq .kb-search-sub {
  margin: 0 0 0.9rem;
  font-size: 0.8rem;
  line-height: 1.65;
  color: var(--mist);
}

.page-faq .kb-bar {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 0.9rem;
  border: 1px solid rgba(18, 240, 200, 0.35);
  border-radius: 999px;
  background: rgba(5, 7, 10, 0.75);
  box-shadow: inset 0 0 22px -12px rgba(18, 240, 200, 0.8);
}

.page-faq .kb-bar-dot {
  flex: none;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 10px var(--neon);
}

.page-faq .kb-bar-term {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  color: var(--fog);
}

.page-faq .kb-bar-caret {
  display: inline-block;
  width: 1px;
  height: 1.05em;
  margin-left: 2px;
  vertical-align: -2px;
  background: var(--neon);
  animation: faq-kb-caret 1.1s steps(1) infinite;
}

.page-faq .kb-bar-hint {
  margin-left: auto;
  font-size: 0.7rem;
  white-space: nowrap;
  color: var(--mist);
}

.page-faq .kb-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0.85rem 0 0;
}

.page-faq .kb-pill {
  padding: 0.3rem 0.72rem;
  border: 1px solid var(--faq-edge);
  border-radius: 999px;
  background: rgba(12, 18, 24, 0.75);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-faq .kb-pill.is-on {
  border-color: var(--magenta);
  background: var(--magenta);
  color: var(--ink);
  font-weight: 700;
  box-shadow: 0 0 0 3px rgba(255, 46, 136, 0.16);
}

.page-faq .kb-pill--clear {
  border-style: dashed;
  color: var(--neon);
  border-color: rgba(18, 240, 200, 0.4);
}

.page-faq .kb-hits {
  display: grid;
  gap: 0.5rem;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .kb-hit {
  padding: 0.5rem 0.75rem;
  border-left: 2px solid rgba(255, 46, 136, 0.55);
  border-radius: 0 8px 8px 0;
  background: rgba(12, 18, 24, 0.6);
}

.page-faq .kb-hit-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 0.25rem;
  font-size: 0.68rem;
  color: var(--mist);
}

.page-faq .kb-hit-title {
  margin: 0;
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--fog);
  overflow-wrap: break-word;
}

.page-faq .kb-hit mark {
  padding: 0 0.15em;
  border-radius: 3px;
  background: var(--faq-hit-bg);
  color: #FFE1EC;
}

/* 图片容器 */
.page-faq .kb-figure {
  margin: 0;
  border: 1px solid var(--faq-edge);
  border-radius: 14px;
  overflow: hidden;
  background: var(--faq-panel);
}

.page-faq .kb-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-faq .kb-figure figcaption {
  padding: 0.6rem 0.85rem;
  border-top: 1px solid var(--faq-edge);
  font-size: 0.72rem;
  line-height: 1.6;
  color: var(--mist);
}

.page-faq .kb-figure--sec {
  margin: 0 0 1.1rem;
}

/* ---------- 双栏骨架 ---------- */
.page-faq .kb-shell {
  display: grid;
  gap: 1.5rem;
}

.page-faq .kb-tree {
  min-width: 0;
  padding-top: 0.85rem;
  border-top: 2px solid var(--magenta);
}

.page-faq .kb-tree-title {
  margin: 0 0 0.7rem;
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .kb-tree-list {
  display: flex;
  gap: 0.4rem;
  margin: 0;
  padding: 0 0 0.35rem;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .kb-tree-list li {
  flex: none;
}

.page-faq .kb-tree-link {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.42rem 0.7rem;
  border: 1px solid var(--faq-edge);
  border-radius: 8px;
  font-size: 0.82rem;
  line-height: 1.45;
  color: var(--mist);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .kb-tree-link .mono {
  font-size: 0.7rem;
  color: var(--magenta);
}

.page-faq .kb-tree-link:hover,
.page-faq .kb-tree-link:focus-visible {
  color: var(--fog);
  border-color: rgba(255, 46, 136, 0.5);
  background: rgba(255, 46, 136, 0.09);
}

.page-faq .kb-main {
  min-width: 0;
}

/* ---------- 章节 ---------- */
.page-faq .kb-sec {
  padding: clamp(1.2rem, 3vw, 2rem) 0;
  border-bottom: 1px solid var(--faq-edge);
  scroll-margin-top: 6rem;
}

.page-faq .kb-sec:last-of-type {
  border-bottom: 0;
}

.page-faq .kb-cap {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  margin: 0 0 1rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--faq-edge);
}

.page-faq .kb-cap-num {
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  color: var(--magenta);
}

.page-faq .kb-cap-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.12rem, 2.4vw, 1.5rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--fog);
}

.page-faq .kb-sec:target .kb-cap-title {
  color: var(--magenta);
}

/* ---------- 问答条目 ---------- */
.page-faq .kb-list {
  display: grid;
  gap: 0.5rem;
}

.page-faq .kb-item {
  border: 1px solid var(--faq-edge);
  border-radius: 12px;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(12, 18, 24, 0.92), rgba(5, 7, 10, 0.62));
  transition: border-color 0.22s var(--ease), box-shadow 0.22s var(--ease);
}

.page-faq .kb-item:hover {
  border-color: rgba(255, 46, 136, 0.32);
}

.page-faq .kb-item[open] {
  border-color: rgba(255, 46, 136, 0.5);
  box-shadow: 0 0 0 1px rgba(255, 46, 136, 0.1), 0 14px 32px -22px rgba(255, 46, 136, 0.6);
}

.page-faq .kb-q {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.9rem 1rem;
  cursor: pointer;
  list-style: none;
  font-size: 0.94rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--fog);
  overflow-wrap: break-word;
}

.page-faq .kb-q::-webkit-details-marker {
  display: none;
}

.page-faq .kb-q::marker {
  content: "";
}

.page-faq .kb-q-text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .kb-q-mark {
  position: relative;
  flex: none;
  width: 18px;
  height: 18px;
  border: 1px solid rgba(255, 46, 136, 0.55);
  border-radius: 5px;
}

.page-faq .kb-q-mark::before,
.page-faq .kb-q-mark::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--magenta);
}

.page-faq .kb-q-mark::before {
  width: 9px;
  height: 1.5px;
  transform: translate(-50%, -50%);
}

.page-faq .kb-q-mark::after {
  width: 1.5px;
  height: 9px;
  transform: translate(-50%, -50%);
  transition: transform 0.22s var(--ease), opacity 0.22s var(--ease);
}

.page-faq .kb-item[open] .kb-q-mark::after {
  transform: translate(-50%, -50%) scaleY(0);
  opacity: 0;
}

.page-faq .kb-a {
  padding: 0 1rem 1rem 2.9rem;
  animation: faq-kb-open 0.26s var(--ease);
}

.page-faq .kb-a p {
  margin: 0 0 0.6rem;
  max-width: 60ch;
  font-size: 0.88rem;
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .kb-a p:last-child {
  margin-bottom: 0;
}

.page-faq .kb-a .mono {
  color: var(--neon);
  font-weight: 600;
}

.page-faq .kb-a a {
  color: var(--neon);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .kb-a a:hover,
.page-faq .kb-a a:focus-visible {
  color: var(--magenta);
}

/* ---------- 收尾 ---------- */
.page-faq .kb-outro {
  margin-top: clamp(1.8rem, 4vw, 2.8rem);
  padding: clamp(1.3rem, 3vw, 2.1rem);
  border: 1px solid var(--faq-edge);
  border-radius: 16px;
  background:
    linear-gradient(135deg, rgba(255, 46, 136, 0.16), rgba(123, 75, 255, 0.11) 58%, rgba(5, 7, 10, 0) 92%),
    var(--faq-panel);
}

.page-faq .kb-outro-title {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.1rem, 2.6vw, 1.45rem);
  color: var(--fog);
}

.page-faq .kb-outro-text {
  margin: 0 0 1.2rem;
  max-width: 56ch;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .kb-outro-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

/* ---------- 动效 ---------- */
@keyframes faq-kb-open {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes faq-kb-caret {
  50% {
    opacity: 0;
  }
}

/* ---------- 响应式 ---------- */
@media (min-width: 880px) {
  .page-faq .kb-search {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: start;
  }

  .page-faq .kb-search-panel {
    padding: 1.4rem 1.5rem;
  }
}

@media (min-width: 1024px) {
  .page-faq .kb-shell {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 3.5rem);
    align-items: start;
  }

  .page-faq .kb-tree {
    position: sticky;
    top: 6rem;
  }

  .page-faq .kb-tree-list {
    display: grid;
    gap: 0.15rem;
    overflow-x: visible;
  }

  .page-faq .kb-tree-link {
    border-color: transparent;
    border-left: 2px solid transparent;
    border-radius: 0 8px 8px 0;
    white-space: normal;
  }

  .page-faq .kb-tree-link:hover,
  .page-faq .kb-tree-link:focus-visible {
    border-left-color: var(--magenta);
    border-top-color: transparent;
    border-right-color: transparent;
    border-bottom-color: transparent;
  }
}

@media (max-width: 640px) {
  .page-faq h1 {
    transform: none;
    max-width: none;
  }

  .page-faq .kb-stat {
    padding-right: 0;
    border-right: 0;
  }

  .page-faq .kb-stats {
    gap: 0.35rem 1.2rem;
  }

  .page-faq .kb-bar-hint {
    display: none;
  }

  .page-faq .kb-a {
    padding-left: 1rem;
    padding-right: 0.9rem;
  }

  .page-faq .kb-q {
    padding: 0.8rem 0.85rem;
    font-size: 0.9rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .kb-item,
  .page-faq .kb-tree-link,
  .page-faq .kb-q-mark::after {
    transition: none;
  }

  .page-faq .kb-a,
  .page-faq .kb-bar-caret {
    animation: none;
  }
}