.page-faq {
  padding-bottom: clamp(48px, 8vw, 96px);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  padding: clamp(18px, 2.6vw, 30px) 0 0;
  font-size: 0.85rem;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  margin-top: clamp(14px, 2vw, 24px);
  border-top: 2px solid var(--stroke);
  border-bottom: 2px solid var(--stroke);
  background: var(--ink-900);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  right: -140px;
  top: -120px;
  width: 460px;
  height: 460px;
  background: var(--lime);
  opacity: 0.07;
  transform: rotate(22deg);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 38%;
  height: 3px;
  background: var(--orange);
  pointer-events: none;
}

.page-faq .faq-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  padding: clamp(36px, 6vw, 80px) 0 clamp(34px, 5vw, 68px);
}

.page-faq .faq-hero-copy .eyebrow {
  color: var(--lime);
}

.page-faq .faq-hero h1 {
  font-family: var(--font-head);
  font-size: clamp(2.1rem, 5.4vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.005em;
  margin: 14px 0 0;
  max-width: 20ch;
}

.page-faq .faq-hero .lede {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: clamp(1rem, 1.35vw, 1.1rem);
  line-height: 1.8;
  color: var(--text);
}

.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-faq .faq-hero-figure {
  margin: 0;
  border: 2px solid var(--stroke);
  background: var(--ink-800);
  box-shadow: var(--shadow);
  overflow: hidden;
}

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

.page-faq .faq-hero-figure figcaption {
  padding: 12px 16px;
  border-top: 2px solid var(--stroke);
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(28px, 4vw, 44px);
  margin-top: clamp(36px, 6vw, 68px);
}

/* ---------- 左侧分组索引 ---------- */
.page-faq .faq-index {
  border: 2px solid var(--stroke);
  background: var(--ink-800);
  box-shadow: var(--shadow);
  padding: 20px 18px 18px;
}

.page-faq .faq-index-title {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px;
}

.page-faq .faq-index-list a {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 9px 10px;
  border-left: 3px solid transparent;
  color: var(--text);
  text-decoration: none;
  font-size: 0.92rem;
  line-height: 1.45;
  transition: background var(--dur) ease-out, border-color var(--dur) ease-out, transform var(--dur) ease-out;
}

.page-faq .faq-index-list a:hover,
.page-faq .faq-index-list a:focus-visible {
  background: var(--ink-700);
  border-left-color: var(--lime);
  transform: translateX(3px);
}

.page-faq .faq-num {
  flex: none;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.76rem;
  letter-spacing: 0.05em;
  color: var(--lime);
}

.page-faq .faq-index-foot {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--stroke);
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--muted);
}

.page-faq .faq-index-foot a {
  color: var(--orange);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 右侧分组 ---------- */
.page-faq .faq-groups {
  display: grid;
  gap: clamp(36px, 5vw, 60px);
  min-width: 0;
}

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

.page-faq .faq-group-head {
  border-top: 2px solid var(--stroke);
  padding-top: 18px;
  margin-bottom: 18px;
}

.page-faq .faq-group-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--ink-900);
  background: var(--lime);
  padding: 3px 10px;
  margin-bottom: 12px;
}

.page-faq .faq-group-head h2 {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(1.45rem, 2.8vw, 2.1rem);
  font-weight: 700;
  line-height: 1.22;
}

.page-faq .faq-group-note {
  margin: 10px 0 0;
  max-width: 62ch;
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-items {
  display: grid;
  gap: 10px;
}

.page-faq .faq-item {
  position: relative;
  overflow: hidden;
  border: 2px solid var(--stroke);
  background: var(--ink-800);
  transition: border-color var(--dur) ease-out, background var(--dur) ease-out;
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--lime);
  opacity: 0;
  transition: opacity var(--dur) ease-out;
}

.page-faq .faq-item[open] {
  border-color: var(--stroke-2);
  background: var(--navy-900);
}

.page-faq .faq-item[open]::before {
  opacity: 1;
}

.page-faq .faq-item summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-size: clamp(0.98rem, 1.3vw, 1.06rem);
  font-weight: 600;
  line-height: 1.55;
  color: var(--text);
  transition: color var(--dur) ease-out;
}

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

.page-faq .faq-item summary:hover {
  color: var(--lime);
}

.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: -4px;
}

.page-faq .faq-item summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--lime);
}

.page-faq .faq-item[open] summary::after {
  content: "−";
  color: var(--orange);
}

.page-faq .faq-answer {
  padding: 2px 20px 20px 20px;
  border-top: 1px solid var(--stroke);
  font-size: 0.96rem;
  line-height: 1.82;
  color: var(--text);
}

.page-faq .faq-answer p {
  margin: 14px 0 0;
  max-width: 66ch;
}

.page-faq .faq-answer p:first-child {
  margin-top: 16px;
}

.page-faq .faq-answer strong {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--lime);
}

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

.page-faq .faq-answer a:hover {
  color: var(--orange);
}

/* ---------- 组内配图 ---------- */
.page-faq .faq-figure {
  margin: 18px 0 0;
  border: 2px solid var(--stroke);
  background: var(--ink-900);
  box-shadow: var(--shadow);
  overflow: hidden;
}

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

.page-faq .faq-figure figcaption {
  padding: 12px 16px;
  border-top: 2px solid var(--stroke);
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 收尾引导 ---------- */
.page-faq .faq-cta {
  position: relative;
  overflow: hidden;
  border: 2px solid var(--lime);
  background: var(--ink-800);
  box-shadow: 8px 8px 0 rgba(255, 138, 43, 0.32);
  padding: clamp(24px, 4vw, 42px);
}

.page-faq .faq-cta::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -80px;
  width: 220px;
  height: 220px;
  border: 2px solid var(--stroke);
  transform: rotate(24deg);
  pointer-events: none;
}

.page-faq .faq-cta .eyebrow {
  color: var(--orange);
}

.page-faq .faq-cta h2 {
  position: relative;
  z-index: 1;
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-size: clamp(1.5rem, 3vw, 2.3rem);
  font-weight: 700;
  line-height: 1.22;
}

.page-faq .faq-cta p {
  position: relative;
  z-index: 1;
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--text);
}

.page-faq .faq-cta-list {
  position: relative;
  z-index: 1;
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-cta-list li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--text);
}

.page-faq .faq-cta-list li::before {
  content: "";
  flex: none;
  width: 8px;
  height: 8px;
  background: var(--lime);
  transform: translateY(-1px);
}

.page-faq .faq-cta .btn {
  position: relative;
  z-index: 1;
  margin-top: 26px;
}

/* ---------- 桌面端 ---------- */
@media (min-width: 960px) {
  .page-faq .faq-hero-inner {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: center;
  }

  .page-faq .faq-body {
    grid-template-columns: 280px minmax(0, 1fr);
    align-items: start;
  }

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

  .page-faq .faq-index-list {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 1280px) {
  .page-faq .faq-groups {
    padding-right: 24px;
  }
}

/* ---------- 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index-list a,
  .page-faq .faq-item,
  .page-faq .faq-item::before,
  .page-faq .faq-item summary {
    transition: none;
  }

  .page-faq .faq-index-list a:hover,
  .page-faq .faq-index-list a:focus-visible {
    transform: none;
  }
}