.page-faq {
  --faq-rail: 232px;
  --faq-hero-pad: clamp(22px, 4vw, 44px);
  background: var(--ink);
  color: var(--snow);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-top: 20px;
  border-bottom: 1px solid var(--line-cyan);
  background:
    repeating-linear-gradient(90deg, rgba(41, 224, 214, 0.05) 0 1px, transparent 1px 96px),
    radial-gradient(120% 90% at 10% 0%, rgba(41, 224, 214, 0.12), transparent 62%),
    var(--ink);
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: 22px;
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: 26px;
  padding-bottom: 30px;
}

.page-faq .faq-kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-faq .faq-kicker-mark {
  width: 22px;
  height: 1px;
  background: var(--signal);
}

.page-faq .faq-hero h1 {
  margin: 0 0 16px;
  font-family: var(--ff-head);
  font-weight: 900;
  font-size: clamp(30px, 7.4vw, 58px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--snow);
}

.page-faq .faq-lede {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(244, 241, 234, 0.78);
}

.page-faq .faq-quick {
  border: 1px solid var(--line-cyan);
  border-radius: var(--r);
  background: rgba(15, 39, 64, 0.72);
  padding: 16px 16px 8px;
}

.page-faq .faq-quick-title {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--stone);
}

.page-faq .faq-quick-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-quick-list li + li {
  border-top: 1px solid var(--line-light);
}

.page-faq .faq-quick-list a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 2px;
  color: var(--snow);
  text-decoration: none;
  transition: color 180ms var(--ease), background-color 180ms var(--ease);
}

.page-faq .faq-quick-k {
  font-size: 12px;
  color: var(--cyan);
}

.page-faq .faq-quick-t {
  flex: 1 1 auto;
  font-size: 15px;
}

.page-faq .faq-quick-a {
  color: var(--cyan);
  font-size: 14px;
  transition: transform 200ms var(--ease);
}

.page-faq .faq-quick-list a:hover,
.page-faq .faq-quick-list a:focus-visible {
  color: var(--cyan);
}

.page-faq .faq-quick-list a:hover .faq-quick-a,
.page-faq .faq-quick-list a:focus-visible .faq-quick-a {
  transform: translateX(4px);
}

.page-faq .faq-hero-art {
  margin: 0;
  border-top: 1px solid var(--line-light);
  overflow: hidden;
  aspect-ratio: 16 / 6;
  max-height: 320px;
}

.page-faq .faq-hero-art img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.82;
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-body {
  padding: 34px 0 8px;
}

.page-faq .faq-layout {
  display: grid;
  gap: 26px;
}

.page-faq .faq-toc {
  border: 1px solid var(--line-light);
  border-radius: var(--r);
  background: rgba(15, 39, 64, 0.55);
  padding: 12px 12px 6px;
}

.page-faq .faq-toc-title {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--stone);
}

.page-faq .faq-toc-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-toc-list li {
  flex: 0 0 auto;
}

.page-faq .toc-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border: 1px solid transparent;
  border-left: 2px solid transparent;
  border-radius: var(--r);
  color: rgba(244, 241, 234, 0.72);
  font-size: 14px;
  white-space: nowrap;
  text-decoration: none;
  transition: color 180ms var(--ease), background-color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-faq .toc-link .num {
  font-size: 12px;
  color: var(--stone);
}

.page-faq .toc-link:hover,
.page-faq .toc-link:focus-visible {
  color: var(--snow);
  border-color: var(--line-cyan-strong);
}

.page-faq .toc-link[aria-current="true"] {
  color: var(--cyan);
  background: var(--ink-3);
  border-left-color: var(--cyan);
}

.page-faq .toc-link[aria-current="true"] .num {
  color: var(--cyan);
}

/* ---------- 章节 ---------- */
.page-faq .faq-chapter {
  padding: 26px 0 30px;
  border-top: 1px solid var(--line-light);
  scroll-margin-top: 84px;
}

.page-faq .faq-chapter:first-of-type {
  border-top: 0;
  padding-top: 4px;
}

.page-faq .faq-chapter:target .faq-chapter-title {
  color: var(--cyan);
}

.page-faq .faq-chapter-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  margin-bottom: 10px;
}

.page-faq .faq-chapter-index {
  font-size: 22px;
  color: var(--amber);
}

.page-faq .faq-chapter-title {
  flex: 1 1 260px;
  margin: 0;
  font-family: var(--ff-head);
  font-weight: 800;
  font-size: clamp(19px, 3.6vw, 26px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--snow);
}

.page-faq .faq-chapter-note {
  margin: 0 0 18px;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(244, 241, 234, 0.62);
}

/* ---------- 问答卡 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 10px;
}

.page-faq .qa-card {
  border: 1px solid var(--line-light);
  border-radius: var(--r);
  background: var(--ink-2);
  transition: border-color 200ms var(--ease), background-color 200ms var(--ease);
}

.page-faq .qa-card[open] {
  border-color: var(--line-cyan-strong);
  background: var(--ink-3);
}

.page-faq .qa-card summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa-card summary:focus-visible {
  outline: 1px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .qa-q {
  flex: 1 1 auto;
  margin: 0;
  font-family: var(--ff-body);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--snow);
}

.page-faq .qa-toggle {
  position: relative;
  flex: 0 0 14px;
  width: 14px;
  height: 14px;
  margin-top: 6px;
}

.page-faq .qa-toggle::before,
.page-faq .qa-toggle::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform 220ms var(--ease), opacity 220ms var(--ease);
}

.page-faq .qa-toggle::before {
  top: 6px;
  left: 0;
  width: 14px;
  height: 1px;
}

.page-faq .qa-toggle::after {
  top: 0;
  left: 6px;
  width: 1px;
  height: 14px;
}

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

.page-faq .qa-a {
  padding: 0 16px 16px;
  border-top: 1px solid var(--line-light);
  margin-top: -1px;
  padding-top: 14px;
}

.page-faq .qa-card[open] .qa-a {
  animation: faq-card-in 240ms var(--ease) both;
}

.page-faq .qa-a p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(244, 241, 234, 0.82);
}

.page-faq .qa-next {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding-bottom: 2px;
  font-size: 14px;
  color: var(--cyan);
  text-decoration: none;
  background-image: linear-gradient(var(--cyan), var(--cyan));
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 0 1px;
  transition: background-size 240ms var(--ease);
}

.page-faq .qa-next::after {
  content: "→";
  transition: transform 220ms var(--ease);
}

.page-faq .qa-next:hover,
.page-faq .qa-next:focus-visible {
  background-size: 100% 1px;
}

.page-faq .qa-next:hover::after,
.page-faq .qa-next:focus-visible::after {
  transform: translateX(4px);
}

@keyframes faq-card-in {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 页尾浅色收束区 ---------- */
.page-faq .faq-close {
  margin-top: 26px;
  background: var(--paper);
  color: var(--ink);
  border-top: 1px solid var(--line-dark);
}

.page-faq .faq-close-grid {
  display: grid;
  gap: 26px;
  align-items: start;
}

.page-faq .faq-close-art {
  margin: 0;
  border: 1px solid var(--line-dark);
  border-radius: var(--r);
  overflow: hidden;
}

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

.page-faq .faq-close-kicker {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--stone);
}

.page-faq .faq-close h2 {
  margin: 0 0 12px;
  font-family: var(--ff-head);
  font-weight: 800;
  font-size: clamp(21px, 4vw, 30px);
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-close-copy > p {
  margin: 0 0 16px;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(10, 27, 46, 0.78);
}

.page-faq .faq-contact-list {
  margin: 0 0 14px;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-dark);
}

.page-faq .faq-contact-list li {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line-dark);
}

.page-faq .faq-contact-k {
  flex: 0 0 78px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--stone);
}

.page-faq .faq-contact-v {
  flex: 1 1 auto;
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink);
  word-break: break-word;
}

.page-faq .faq-contact-v.num {
  color: var(--clay);
}

.page-faq .faq-close-note {
  padding-left: 12px;
  border-left: 2px solid var(--amber);
  font-size: 13px;
  line-height: 1.7;
  color: var(--stone);
}

.page-faq .faq-close-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 20px;
  margin-top: 18px;
}

.page-faq .faq-close-btn {
  color: var(--ink);
  border-color: var(--ink);
}

.page-faq .faq-close-next {
  color: var(--clay);
  background-image: linear-gradient(var(--clay), var(--clay));
}

.page-faq .faq-close-next::after {
  content: "→";
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: end;
  }

  .page-faq .faq-quick {
    padding: 18px 18px 10px;
  }

  .page-faq .faq-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-close-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: 34px;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-body {
    padding-top: 44px;
  }

  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 86px;
  }

  .page-faq .faq-toc {
    padding: 16px 14px 12px;
  }

  .page-faq .faq-toc-list {
    display: block;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-faq .faq-toc-list li + li {
    margin-top: 2px;
  }

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

  .page-faq .toc-link:hover,
  .page-faq .toc-link:focus-visible {
    background: rgba(22, 50, 79, 0.7);
  }

  .page-faq .faq-chapter {
    padding: 30px 0 36px;
  }

  .page-faq .qa-card summary {
    padding: 17px 20px;
  }

  .page-faq .qa-a {
    padding: 14px 20px 18px;
  }

  .page-faq .faq-close-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: 56px;
  }
}

@media (min-width: 1200px) {
  .page-faq {
    --faq-rail: 252px;
  }

  .page-faq .faq-chapter-title {
    font-size: 27px;
  }
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-card[open] .qa-a {
    animation: none;
  }

  .page-faq .qa-next::after,
  .page-faq .faq-quick-a,
  .page-faq .qa-toggle::before,
  .page-faq .qa-toggle::after {
    transition: none;
  }
}