.page-faq {
  --faq-rail: 260px;
  --faq-gap: 32px;
}

.page-faq .crumb {
  margin: 28px 0 20px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: 24px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dim);
}

.page-faq .faq-hero h1 {
  margin: 0 0 16px;
  font-size: clamp(2rem, 6.4vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.06;
  color: var(--text);
  max-width: 20ch;
}

.page-faq .faq-hero__lede {
  margin: 0 0 22px;
  max-width: 60ch;
  font-size: 16.5px;
  line-height: 1.75;
  color: var(--dim);
}

.page-faq .faq-hero__quick {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-hero__figure {
  margin: 0;
}

.page-faq .faq-hero__cap {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--pulse);
}

/* ---------- 布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: var(--faq-gap);
  padding: 40px 0 72px;
}

/* ---------- 分类索引 ---------- */
.page-faq .faq-index {
  padding: 22px 18px 18px;
  align-self: start;
  border-left: 3px solid var(--pulse);
}

.page-faq .faq-index__cap {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-index__list a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 10px;
  text-decoration: none;
  color: var(--dim);
  border-left: 2px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--text);
  background: var(--ink-2);
  border-left-color: var(--pulse);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cool);
  flex: none;
}

.page-faq .faq-index__label {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.4;
}

.page-faq .faq-index__note {
  margin: 14px 0 0;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--dim);
}

.page-faq .faq-index__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--ink-3);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cool);
}

.page-faq .faq-index__meta span {
  padding: 3px 8px;
  background: var(--ink-2);
  clip-path: var(--cut-sm);
}

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

.page-faq .faq-group {
  padding-top: 8px;
  margin-bottom: 56px;
  scroll-margin-top: calc(var(--topbar-h) + 20px);
}

.page-faq .faq-group:last-of-type {
  margin-bottom: 40px;
}

.page-faq .faq-group__intro {
  margin: 0 0 20px;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.7;
  color: var(--dim);
}

.page-faq .faq-group--focus .section-head h2 {
  color: var(--pulse);
}

.page-faq .faq-group--focus {
  padding: 26px 20px 8px;
  background: linear-gradient(180deg, rgba(57, 255, 136, 0.05), rgba(57, 255, 136, 0) 60%);
  border-left: 2px solid var(--pulse-deep);
}

.page-faq .faq-group--help {
  padding: 26px 20px 24px;
  background: var(--ink-1);
  border-top: 1px solid var(--ink-3);
}

/* ---------- 问答条目 ---------- */
.page-faq .qa {
  border-bottom: 1px solid var(--ink-3);
}

.page-faq .qa[open] {
  background: var(--ink-1);
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 14px 16px 0;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.5;
  color: var(--text);
}

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

.page-faq .qa__q::after {
  content: "＋";
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--cool);
  transition: color 0.18s ease, transform 0.18s ease;
}

.page-faq .qa[open] .qa__q::after {
  content: "－";
  color: var(--pulse);
}

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

.page-faq .qa__tag {
  flex: none;
  margin-top: 2px;
}

.page-faq .qa__text {
  flex: 1 1 auto;
}

.page-faq .qa__body {
  padding: 0 16px 20px 0;
  max-width: 72ch;
}

.page-faq .qa__body p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--dim);
}

.page-faq .qa__body p:last-child {
  margin-bottom: 0;
}

.page-faq .qa__head {
  color: var(--text) !important;
  font-weight: 700;
  border-left: 3px solid var(--pulse);
  padding-left: 12px;
}

.page-faq .qa--key .qa__head {
  border-left-color: var(--amber);
}

.page-faq .faq-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 700;
  color: var(--pulse);
  text-decoration: none;
  border-bottom: 1px solid var(--pulse-deep);
  padding-bottom: 1px;
}

.page-faq .faq-link:hover,
.page-faq .faq-link:focus-visible {
  border-bottom-color: var(--pulse);
}

/* ---------- 视图切换配图 ---------- */
.page-faq .faq-switch-figure {
  margin: 0 0 22px;
}

/* ---------- 联系块 ---------- */
.page-faq .faq-contact {
  padding: 22px 20px;
}

.page-faq .faq-contact__lede {
  margin: 0 0 16px;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--dim);
}

.page-faq .faq-contact__list {
  margin-bottom: 14px;
}

.page-faq .faq-contact__list a {
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid var(--ink-3);
}

.page-faq .faq-contact__list a:hover,
.page-faq .faq-contact__list a:focus-visible {
  color: var(--pulse);
  border-bottom-color: var(--pulse);
}

.page-faq .faq-contact__note {
  margin: 0 0 18px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--dim);
}

.page-faq .faq-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 相关页面 ---------- */
.page-faq .faq-more {
  padding: 20px 18px;
}

.page-faq .faq-more__cap {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--dim);
}

.page-faq .faq-more__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-more__list a {
  display: block;
  padding: 11px 10px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--dim);
  text-decoration: none;
  border-left: 2px solid var(--ink-3);
  transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.page-faq .faq-more__list a:hover,
.page-faq .faq-more__list a:focus-visible {
  color: var(--text);
  background: var(--ink-2);
  border-left-color: var(--pulse);
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__list a,
  .page-faq .faq-more__list a,
  .page-faq .qa__q::after {
    transition: none;
  }
}

/* ---------- 中屏 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero {
    grid-template-columns: 1fr;
  }
  .page-faq .faq-contact {
    padding: 26px 24px;
  }
}

/* ---------- 桌面：左轨 + 右列表 ---------- */
@media (min-width: 1024px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
    gap: 40px;
    padding-bottom: 48px;
  }

  .page-faq .faq-hero__figure {
    align-self: stretch;
  }

  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: 44px;
    padding-top: 48px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--topbar-h) + 24px);
  }

  .page-faq .faq-group--focus {
    padding: 30px 26px 12px;
  }

  .page-faq .qa__q {
    font-size: 16.5px;
    padding-right: 20px;
  }

  .page-faq .faq-contact {
    display: grid;
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 28px;
    align-items: start;
  }

  .page-faq .faq-contact__lede {
    grid-column: 1;
    margin-bottom: 0;
  }

  .page-faq .faq-contact__list {
    grid-column: 1;
    margin-bottom: 0;
  }

  .page-faq .faq-contact__note {
    grid-column: 1;
    margin-bottom: 0;
  }

  .page-faq .faq-contact__actions {
    grid-column: 2;
    grid-row: 1 / span 3;
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ---------- 宽屏 ---------- */
@media (min-width: 1400px) {
  .page-faq .faq-layout {
    gap: 56px;
  }

  .page-faq .qa__body {
    padding-right: 40px;
  }
}
</main>