.page-faq {
  --faq-index-w: 282px;
  --faq-gap: clamp(28px, 4vw, 52px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-block: clamp(24px, 4vw, 44px) clamp(36px, 5.5vw, 72px);
  overflow: hidden;
}

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

.page-faq .faq-hero__glow {
  position: absolute;
  top: -22%;
  right: -12%;
  width: min(760px, 88vw);
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background:
    radial-gradient(circle at 34% 36%, rgba(53, 230, 224, 0.24), transparent 58%),
    radial-gradient(circle at 68% 66%, rgba(139, 92, 246, 0.26), transparent 62%);
  filter: blur(6px);
  pointer-events: none;
  z-index: 0;
}

.page-faq .faq-hero__rail {
  position: absolute;
  left: -8%;
  bottom: 6%;
  width: 118%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(53, 230, 224, 0.42) 34%, rgba(139, 92, 246, 0.42) 66%, transparent);
  transform: rotate(-3.4deg);
  pointer-events: none;
  z-index: 1;
}

.page-faq .breadcrumb {
  margin-bottom: 26px;
}

.page-faq .faq-hero .eyebrow {
  margin: 0 0 18px;
}

.page-faq .faq-hero h1 {
  margin: 0;
  max-width: 17ch;
  font-family: var(--font-display);
  font-size: clamp(34px, 6vw, 62px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-faq .faq-hero .lede {
  margin: 22px 0 0;
  max-width: 60ch;
  font-size: clamp(1rem, 1.6vw, 1.08rem);
  line-height: 1.8;
  color: var(--text-muted);
}

/* ---------- 三步解法 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: clamp(34px, 5vw, 54px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-faq .faq-step {
  position: relative;
  padding: 24px 22px 22px;
  border-radius: var(--radius-m);
  border: 1px solid var(--line-cyan);
  background:
    linear-gradient(158deg, rgba(53, 230, 224, 0.1), rgba(139, 92, 246, 0.08) 62%, rgba(11, 16, 38, 0.2));
  overflow: hidden;
}

.page-faq .faq-step::after {
  content: "";
  position: absolute;
  inset: auto -30% -60% auto;
  width: 190px;
  height: 190px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 138, 61, 0.18), transparent 66%);
  pointer-events: none;
}

.page-faq .faq-step__no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-bottom: 16px;
  border-radius: 50%;
  border: 1px solid var(--neon-cyan);
  color: var(--neon-cyan);
  font-family: var(--font-mono);
  font-size: 1.05rem;
  line-height: 1;
  background: rgba(53, 230, 224, 0.08);
}

.page-faq .faq-step__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 1.06rem;
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .faq-step p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.78;
  color: var(--text-muted);
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-body {
  padding-block: clamp(30px, 4vw, 52px) clamp(56px, 7vw, 96px);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 38px;
  align-items: start;
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-index {
  padding: 22px 20px 20px;
  border-radius: var(--radius-m);
  border: 1px solid var(--line);
  background: var(--glass);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.page-faq .faq-index__figure {
  margin: 0 0 20px;
  border-radius: var(--radius-s);
  overflow: hidden;
  border: 1px solid var(--line);
  background: linear-gradient(140deg, rgba(139, 92, 246, 0.22), rgba(53, 230, 224, 0.12));
}

.page-faq .faq-index__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.page-faq .faq-index__title {
  margin: 0 0 14px;
  padding-left: 14px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--neon-cyan);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-faq .faq-index__list a {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px 10px 15px;
  border-radius: var(--radius-s);
  color: var(--text-muted);
  font-size: 0.94rem;
  line-height: 1.5;
  text-decoration: none;
  transition: color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-faq .faq-index__list a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 3px;
  height: 0;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--neon-cyan), var(--violet));
  transform: translateY(-50%);
  transition: height 0.3s var(--ease);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--text);
  background: rgba(53, 230, 224, 0.08);
}

.page-faq .faq-index__list a:hover::before,
.page-faq .faq-index__list a:focus-visible::before {
  height: 62%;
}

.page-faq .faq-index__no {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--stardust);
  letter-spacing: 0.04em;
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-panels {
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: 128px;
  padding-bottom: clamp(38px, 5vw, 62px);
  margin-bottom: clamp(30px, 4vw, 46px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group:last-child {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-group__head {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 22px;
}

.page-faq .faq-group__no {
  flex: none;
  margin-top: 4px;
  padding: 4px 8px;
  border-radius: 6px;
  background: var(--neon-cyan);
  color: #06211f;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.page-faq .faq-group__head h2 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(1.28rem, 2.6vw, 1.72rem);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-faq .faq-group__sub {
  margin: 0;
  max-width: 56ch;
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--text-muted);
}

.page-faq .faq-figure {
  margin: 0 0 26px;
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-faq .qa {
  border-radius: var(--radius-m);
  border: 1px solid var(--line);
  background: var(--surface);
  overflow: hidden;
  transition: border-color 0.28s var(--ease), background 0.28s var(--ease);
}

.page-faq .qa[open] {
  border-color: var(--line-cyan);
  background: linear-gradient(180deg, rgba(53, 230, 224, 0.06), rgba(19, 26, 58, 0.2) 46%), var(--surface);
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px 18px 18px 20px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.55;
  letter-spacing: -0.005em;
  color: var(--text);
  transition: color 0.22s var(--ease);
}

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

.page-faq .qa__q::marker {
  content: "";
}

.page-faq .qa__q:hover,
.page-faq .qa__q:focus-visible {
  color: var(--neon-cyan);
}

.page-faq .qa__no {
  flex: none;
  margin-top: 3px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--stardust);
}

.page-faq .qa[open] .qa__no {
  color: var(--neon-cyan);
}

.page-faq .qa__text {
  min-width: 0;
}

.page-faq .qa__toggle {
  position: relative;
  flex: none;
  width: 24px;
  height: 24px;
  margin-top: 1px;
  margin-left: auto;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  transition: border-color 0.28s var(--ease), transform 0.28s var(--ease);
}

.page-faq .qa[open] .qa__toggle {
  border-color: var(--neon-cyan);
  background: rgba(53, 230, 224, 0.1);
}

.page-faq .qa__toggle::before,
.page-faq .qa__toggle::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--neon-cyan);
  transform-origin: center;
}

.page-faq .qa__toggle::before {
  width: 10px;
  height: 1.5px;
  transform: translate(-50%, -50%);
}

.page-faq .qa__toggle::after {
  width: 1.5px;
  height: 10px;
  transform: translate(-50%, -50%);
  transition: transform 0.28s var(--ease);
}

.page-faq .qa[open] .qa__toggle::after {
  transform: translate(-50%, -50%) scaleY(0);
}

.page-faq .qa__a {
  padding: 0 20px 20px 52px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.8;
}

.page-faq .qa__a p {
  margin: 0;
  border-top: 1px dashed var(--line);
  padding-top: 16px;
}

/* ---------- 人工协助 ---------- */
.page-faq .help-card {
  padding: clamp(22px, 3.4vw, 34px);
  border-radius: var(--radius-l);
  border: 1px solid var(--line-cyan);
  background:
    radial-gradient(circle at 88% 12%, rgba(255, 138, 61, 0.14), transparent 52%),
    linear-gradient(150deg, rgba(53, 230, 224, 0.09), rgba(139, 92, 246, 0.09));
}

.page-faq .help-card__lead {
  margin: 0 0 20px;
  font-size: 1.02rem;
  line-height: 1.75;
  color: var(--text);
}

.page-faq .help-card__list {
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .help-card__list li {
  padding: 16px 18px;
  border-radius: var(--radius-s);
  border: 1px solid var(--line);
  background: rgba(11, 16, 38, 0.42);
  font-size: 0.93rem;
  line-height: 1.75;
  color: var(--text-muted);
}

.page-faq .help-card__key {
  display: inline-block;
  margin-right: 10px;
  padding: 2px 8px;
  border-radius: 5px;
  background: var(--night-blue);
  border: 1px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--neon-cyan);
}

.page-faq .help-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 18px;
}

.page-faq .help-card__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  line-height: 1.9;
  letter-spacing: 0.02em;
  color: var(--stardust);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .help-card__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: var(--faq-gap);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 108px;
  }

  .page-faq .qa__a {
    padding-left: 78px;
  }
}

@media (max-width: 959px) {
  .page-faq .faq-index {
    padding: 20px 18px;
  }

  .page-faq .faq-index__figure {
    max-width: 168px;
  }

  .page-faq .faq-index__list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 8px;
  }

  .page-faq .faq-index__list a {
    padding: 8px 14px;
    border: 1px solid var(--line);
    background: rgba(11, 16, 38, 0.4);
  }

  .page-faq .faq-index__list a::before {
    display: none;
  }
}

@media (max-width: 639px) {
  .page-faq .qa__q {
    gap: 10px;
    padding: 16px 14px 16px 16px;
    font-size: 0.96rem;
  }

  .page-faq .qa__a {
    padding: 0 16px 18px 16px;
  }

  .page-faq .faq-group__head {
    gap: 12px;
  }

  .page-faq .help-card__actions .btn {
    flex: 1 1 auto;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__q,
  .page-faq .qa__toggle,
  .page-faq .qa__toggle::after,
  .page-faq .faq-index__list a,
  .page-faq .faq-index__list a::before {
    transition: none;
  }
}