.page-faq {
  --faq-index-w: 264px;
  background: var(--mist);
  color: var(--rock);
  font-family: var(--font-body);
}

.page-faq .container {
  padding-inline: var(--gutter);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 18px 0 52px;
  background: linear-gradient(180deg, var(--paper) 0%, var(--mist) 100%);
  border-bottom: 1px solid var(--line-strong);
}

.page-faq .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--rock);
}

.page-faq .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line-soft);
}

.page-faq .breadcrumb a {
  color: var(--tide-blue);
  text-decoration: none;
}

.page-faq .breadcrumb a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .hero-grid {
  display: grid;
  gap: 28px;
}

.page-faq .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--coral);
}

.page-faq .hero-copy h1 {
  margin: 12px 0 16px;
  font-family: var(--font-display);
  font-size: clamp(30px, 6vw, 52px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--deep-sea);
}

.page-faq .hero-lede {
  margin: 0;
  max-width: 32em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--rock);
}

.page-faq .hero-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .hero-jump a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line-strong);
  background: var(--paper);
  box-shadow: 2px 2px 0 rgba(14, 42, 71, 0.1);
  color: var(--deep-sea);
  font-size: 14px;
  text-decoration: none;
  transition: transform 180ms var(--ease-tide), border-color 180ms var(--ease-tide);
}

.page-faq .hero-jump a span {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--sand);
}

.page-faq .hero-jump a:hover {
  border-color: var(--coral);
  transform: translate(-2px, -2px);
}

.page-faq .hero-figure {
  margin: 0;
  border: 2px solid var(--deep-sea);
  background: var(--paper);
  box-shadow: var(--hard-shadow);
}

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

.page-faq .hero-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  line-height: 1.6;
  color: var(--rock);
  background: var(--paper);
}

/* ---------- 主体双栏 ---------- */
.page-faq .faq-body-wrap {
  padding: 44px 0 72px;
}

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

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

/* ---------- 左栏索引 ---------- */
.page-faq .faq-index {
  padding: 16px;
  border: 2px solid var(--deep-sea);
  background: var(--paper);
  box-shadow: var(--hard-shadow-sm);
}

.page-faq .index-caption {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--tide-blue);
}

.page-faq .index-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  overscroll-behavior-x: contain;
}

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

.page-faq .index-link {
  display: flex;
  gap: 8px;
  align-items: baseline;
  padding: 8px 10px;
  border: 1px solid var(--line-soft);
  color: var(--deep-sea);
  font-size: 14px;
  white-space: nowrap;
  text-decoration: none;
  transition: border-color 160ms var(--ease-tide), background 160ms var(--ease-tide);
}

.page-faq .index-link span {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--sand);
}

.page-faq .index-link:hover,
.page-faq .index-link[aria-current="true"] {
  border-color: var(--coral);
  background: var(--mist);
}

.page-faq .index-foot {
  margin: 14px 0 0;
  font-size: 13px;
}

.page-faq .index-foot a {
  color: var(--tide-blue);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 96px;
}

.page-faq .faq-group + .faq-group {
  margin-top: 56px;
}

.page-faq .group-head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-strong);
}

.page-faq .group-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--sand);
}

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

.page-faq .group-title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 23px;
  font-weight: 800;
  line-height: 1.3;
  color: var(--deep-sea);
}

.page-faq .group-desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--rock);
}

.page-faq .group-count {
  flex: 0 0 auto;
  margin-top: 4px;
}

/* ---------- 问答列表 ---------- */
.page-faq .qa-list {
  border: 2px solid var(--deep-sea);
  background: var(--paper);
  box-shadow: var(--hard-shadow-sm);
}

.page-faq .qa {
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .qa:last-child {
  border-bottom: 0;
}

.page-faq .qa[open] {
  background: var(--mist);
  box-shadow: inset 3px 0 0 var(--coral);
}

.page-faq .qa summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  transition: background 160ms var(--ease-tide);
}

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

.page-faq .qa summary:hover {
  background: rgba(14, 42, 71, 0.05);
}

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

.page-faq .qa summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--coral);
}

.page-faq .qa[open] summary::after {
  content: "\2212";
}

.page-faq .qa-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--tide-blue);
}

.page-faq .qa-q {
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--deep-sea);
}

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

.page-faq .qa-answer {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--rock);
}

.page-faq .qa-answer strong {
  color: var(--deep-sea);
  font-weight: 600;
}

.page-faq .qa-note {
  margin: 12px 0 0;
  padding: 8px 12px;
  border-left: 3px solid var(--sand);
  background: rgba(216, 169, 75, 0.12);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--rock);
}

.page-faq .qa-more {
  margin: 10px 0 0;
  font-size: 14px;
}

.page-faq .qa-more a {
  color: var(--tide-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 通栏图片 ---------- */
.page-faq .faq-banner {
  margin: 52px 0;
  border: 2px solid var(--deep-sea);
  background: var(--paper);
  box-shadow: var(--hard-shadow);
}

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

.page-faq .faq-banner figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  line-height: 1.6;
  color: var(--rock);
}

/* ---------- 兜底面板 ---------- */
.page-faq .faq-fallback {
  margin-top: 56px;
  padding: 28px 20px;
  scroll-margin-top: 96px;
  background: var(--deep-sea);
  color: var(--mist);
  border: 2px solid var(--deep-sea);
  box-shadow: var(--hard-shadow);
}

.page-faq .fallback-eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--sand);
}

.page-faq .fallback-title {
  margin: 10px 0 12px;
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 800;
  line-height: 1.3;
  color: var(--mist);
}

.page-faq .fallback-lede {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--on-dark-soft);
}

.page-faq .fallback-steps {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .fallback-steps li {
  display: flex;
  gap: 12px;
  padding: 12px 0;
  border-top: 1px solid var(--on-dark-line);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--on-dark-soft);
}

.page-faq .step-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--coral-light);
}

.page-faq .fallback-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin: 22px 0 0;
}

.page-faq .fallback-cta .btn {
  flex: 0 0 auto;
}

.page-faq .fallback-hint {
  font-size: 13px;
  color: var(--on-dark-soft);
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero {
    padding: 22px 0 64px;
  }

  .page-faq .qa summary {
    padding: 17px 22px;
  }

  .page-faq .qa-a {
    padding: 0 22px 20px;
  }

  .page-faq .faq-fallback {
    padding: 34px 30px;
  }
}

@media (min-width: 880px) {
  .page-faq .hero-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 44px;
    align-items: end;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-body-wrap {
    padding: 56px 0 88px;
  }

  .page-faq .faq-body {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: 48px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 96px;
  }

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

  .page-faq .index-list li + li {
    margin-top: 6px;
  }

  .page-faq .index-link {
    white-space: normal;
  }

  .page-faq .group-num {
    font-size: 34px;
  }

  .page-faq .group-title {
    font-size: 25px;
  }
}

@media (min-width: 1180px) {
  .page-faq .qa-answer {
    max-width: 36em;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .hero-jump a,
  .page-faq .qa summary,
  .page-faq .index-link {
    transition: none;
  }

  .page-faq .hero-jump a:hover {
    transform: none;
  }
}