.page-faq {
  --faq-line: rgba(138, 147, 166, 0.26);
  --faq-glow: rgba(34, 230, 200, 0.14);
  --faq-warm: rgba(255, 122, 47, 0.12);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-masthead {
  position: relative;
  padding: 7.5rem 0 2.5rem;
  background:
    radial-gradient(120% 90% at 10% 0%, var(--faq-glow), transparent 58%),
    radial-gradient(90% 80% at 94% 8%, var(--faq-warm), transparent 62%),
    linear-gradient(180deg, var(--ink-800), var(--ink-900));
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-faq .faq-masthead::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 3px;
  background: repeating-linear-gradient(90deg, var(--stone) 0 1px, transparent 1px 14px);
  opacity: 0.5;
}

.page-faq .faq-mast-copy {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  max-width: 44rem;
}

.page-faq .faq-masthead h1 {
  margin: 0;
  font-size: clamp(1.95rem, 7.4vw, 3.5rem);
  line-height: 1.14;
  letter-spacing: -0.01em;
  font-weight: 900;
  color: var(--paper);
}

.page-faq .faq-masthead .lede {
  margin: 0;
  max-width: 38rem;
  color: var(--mist);
  font-size: 1rem;
  line-height: 1.75;
  overflow-wrap: anywhere;
}

.page-faq .faq-mast-stats {
  list-style: none;
  margin: 0.5rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.4rem;
  font-size: 0.82rem;
  color: var(--stone);
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

.page-faq .faq-mast-stats .num {
  color: var(--cyan);
  font-size: 1rem;
  margin-right: 0.25rem;
}

.page-faq .faq-mast-figure {
  margin: 2rem 0 0;
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  background: var(--ink-900);
  box-shadow: var(--shadow);
}

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

.page-faq .faq-mast-figure .media-caption {
  display: block;
  padding: 0.7rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--stone);
  border-top: 1px solid var(--line);
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-body {
  padding-top: 2rem;
  padding-bottom: 4rem;
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  min-width: 0;
}

.page-faq .faq-columns {
  display: grid;
  gap: 0;
  min-width: 0;
}

/* ---------- 分类目录 ---------- */
.page-faq .faq-index {
  min-width: 0;
}

.page-faq .faq-index-title {
  margin: 0 0 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--stone);
}

.page-faq .faq-index .anchor-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.3rem;
}

.page-faq .faq-index .anchor-link {
  display: flex;
  gap: 0.7rem;
  align-items: baseline;
  padding: 0.55rem 0.75rem;
  border-radius: 10px;
  border-left: 2px solid transparent;
  color: var(--stone);
  text-decoration: none;
  font-size: 0.9rem;
  line-height: 1.45;
  transition: color 0.22s var(--ease), border-color 0.22s var(--ease), background-color 0.22s var(--ease);
}

.page-faq .faq-index .anchor-link .num {
  font-size: 0.72rem;
  opacity: 0.75;
}

.page-faq .faq-index .anchor-link:hover {
  color: var(--mist);
  background: rgba(34, 230, 200, 0.06);
}

.page-faq .faq-index .anchor-link[aria-current="true"] {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: rgba(34, 230, 200, 0.09);
}

.page-faq .faq-index-help {
  margin-top: 1.4rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(244, 241, 232, 0.03);
  display: grid;
  gap: 0.55rem;
}

.page-faq .faq-index-help-title {
  margin: 0;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-index-help-text {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.65;
  color: var(--stone);
}

.page-faq .faq-index-help .btn {
  justify-self: start;
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-block {
  padding-top: 2.2rem;
  margin-top: 2.2rem;
  border-top: 1px solid var(--line);
  scroll-margin-top: 6rem;
  min-width: 0;
}

.page-faq .faq-block:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.page-faq .faq-block-head {
  position: relative;
  padding-left: 3.1rem;
  display: grid;
  gap: 0.5rem;
  margin-bottom: 1.15rem;
}

.page-faq .faq-block-head::before {
  content: "";
  position: absolute;
  left: 2.35rem;
  top: 0.35rem;
  bottom: 0.35rem;
  width: 1px;
  background: repeating-linear-gradient(180deg, var(--line-strong) 0 3px, transparent 3px 8px);
}

.page-faq .faq-block-idx {
  position: absolute;
  left: 0;
  top: 0.15rem;
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--cyan);
  letter-spacing: 0.06em;
}

.page-faq .faq-block .section-title {
  margin: 0;
  font-size: clamp(1.3rem, 4vw, 1.85rem);
  line-height: 1.25;
  font-weight: 800;
  color: var(--paper);
}

.page-faq .faq-block-note {
  margin: 0;
  max-width: 40rem;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--stone);
}

.page-faq .qa-list {
  display: grid;
  gap: 0.65rem;
}

/* ---------- 手风琴 ---------- */
.page-faq .qa {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: linear-gradient(180deg, rgba(18, 42, 77, 0.55), rgba(5, 14, 31, 0.5));
  overflow: hidden;
  transition: border-color 0.24s var(--ease), box-shadow 0.24s var(--ease), background-color 0.24s var(--ease);
}

.page-faq .qa[open] {
  border-color: rgba(34, 230, 200, 0.48);
  box-shadow: inset 3px 0 0 var(--cyan);
}

.page-faq .qa-q {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  padding: 0.95rem 1.05rem;
  cursor: pointer;
  list-style: none;
  font-size: 0.98rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--mist);
  transition: color 0.22s var(--ease);
}

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

.page-faq .qa-q:hover {
  color: var(--paper);
}

.page-faq .qa-index {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--orange);
  padding-top: 0.22rem;
}

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

.page-faq .qa-mark {
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  position: relative;
  margin-top: 0.35rem;
}

.page-faq .qa-mark::before,
.page-faq .qa-mark::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  border-radius: 2px;
}

.page-faq .qa-mark::before {
  left: 0;
  right: 0;
  top: 6px;
  height: 2px;
}

.page-faq .qa-mark::after {
  top: 0;
  bottom: 0;
  left: 6px;
  width: 2px;
  transition: transform 0.22s var(--ease);
}

.page-faq .qa[open] .qa-mark::after {
  transform: scaleY(0);
}

.page-faq .qa-a {
  padding: 0 1.05rem 1.1rem 1.05rem;
  display: grid;
  gap: 0.7rem;
  border-top: 1px solid var(--faq-line);
  padding-top: 0.9rem;
  margin-top: 0.15rem;
}

.page-faq .qa-a p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.78;
  color: var(--mist);
  overflow-wrap: anywhere;
}

.page-faq .qa-steps {
  counter-reset: step;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.page-faq .qa-steps li {
  position: relative;
  padding-left: 2.15rem;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .qa-steps li::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.06rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--orange);
  border: 1px solid rgba(255, 122, 47, 0.42);
  border-radius: 6px;
  padding: 0.08rem 0.3rem;
}

.page-faq .qa-next {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: var(--stone);
}

.page-faq .qa-next a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px dashed rgba(34, 230, 200, 0.5);
  padding-bottom: 1px;
}

.page-faq .qa-next a:hover {
  border-bottom-style: solid;
}

.page-faq .faq-figure {
  margin: 0.4rem 0 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  background: var(--ink-900);
}

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

.page-faq .faq-figure .media-caption {
  display: block;
  padding: 0.6rem 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--stone);
  border-top: 1px solid var(--line);
}

/* ---------- 底部人工协助 ---------- */
.page-faq .faq-help {
  margin-top: 3rem;
  padding: 1.4rem;
  border: 1px solid var(--line-strong);
  border-radius: 18px;
  background:
    radial-gradient(120% 130% at 0% 0%, rgba(34, 230, 200, 0.13), transparent 60%),
    radial-gradient(100% 120% at 100% 100%, rgba(255, 122, 47, 0.11), transparent 62%),
    rgba(10, 26, 51, 0.7);
  display: grid;
  gap: 1.1rem;
}

.page-faq .faq-help-copy {
  display: grid;
  gap: 0.5rem;
}

.page-faq .faq-help-title {
  margin: 0;
  font-size: clamp(1.2rem, 4.4vw, 1.7rem);
  line-height: 1.28;
  font-weight: 800;
  color: var(--paper);
}

.page-faq .faq-help-text {
  margin: 0;
  max-width: 40rem;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-help-channels {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.page-faq .faq-help-item {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(5, 14, 31, 0.55);
}

.page-faq .faq-help-item .fc-key {
  font-size: 0.78rem;
  color: var(--stone);
  flex: 0 0 auto;
}

.page-faq .faq-help-item .fc-val {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color: var(--paper);
  flex: 1 1 auto;
  min-width: 0;
  overflow-wrap: anywhere;
}

.page-faq .faq-help .btn.btn-signal {
  justify-self: start;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-masthead {
    padding: 8.5rem 0 3rem;
  }

  .page-faq .qa-q {
    font-size: 1.02rem;
    padding: 1.05rem 1.25rem;
  }

  .page-faq .qa-a {
    padding: 0 1.25rem 1.25rem;
  }

  .page-faq .faq-help {
    padding: 1.9rem;
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 3.4rem;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 7rem;
  }

  .page-faq .faq-mast-figure {
    margin-top: 2.4rem;
  }

  .page-faq .faq-help {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-faq .faq-help-channels {
    grid-column: 2;
    grid-row: 1 / span 2;
  }

  .page-faq .faq-help .btn.btn-signal {
    grid-column: 1;
  }
}

@media (min-width: 1280px) {
  .page-faq .faq-layout {
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 4.2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa-q,
  .page-faq .qa-mark::after,
  .page-faq .faq-index .anchor-link {
    transition: none;
  }
}