.page-faq {
  --faq-rail: 236px;
  --faq-gap: 32px;
  --faq-bleed: 12px;
  padding-bottom: 72px;
  background: var(--c-turf);
  color: var(--c-lamp);
}

.page-faq .breadcrumb {
  padding-block: 18px 0;
}

/* ---------- 首屏 ---------- */
.faq-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line-grid);
  background:
    radial-gradient(120% 96% at 86% -14%, rgba(44, 42, 107, .62), rgba(12, 59, 46, 0) 58%),
    var(--c-turf);
}

.faq-hero::after {
  content: "";
  position: absolute;
  right: -130px;
  bottom: -170px;
  width: 420px;
  height: 420px;
  transform: rotate(-20deg);
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 28px 28px;
  opacity: .8;
  pointer-events: none;
}

.faq-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 28px;
  padding-block: 30px 42px;
}

.faq-kicker {
  margin: 0 0 14px;
  font-family: var(--font-narrow);
  font-size: var(--fs-14);
  letter-spacing: .08em;
  color: var(--c-data);
}

.faq-kicker::before {
  content: "";
  display: inline-block;
  width: 18px;
  height: 2px;
  margin-right: 10px;
  vertical-align: middle;
  background: var(--c-score);
}

.faq-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(32px, 8.4vw, 58px);
  line-height: 1.08;
  letter-spacing: -.012em;
}

.faq-hero h1 em {
  font-style: normal;
  color: var(--c-score);
}

.faq-lede {
  margin: 18px 0 0;
  max-width: 56ch;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--ink-dim);
}

.faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.faq-jump a {
  display: block;
  padding: 8px 12px;
  border: 1px solid var(--line-hair);
  border-left: 2px solid var(--c-score);
  font-family: var(--font-narrow);
  font-size: var(--fs-14);
  color: var(--c-lamp);
  text-decoration: none;
  transition: background-color 160ms ease, border-color 160ms ease;
}

.faq-jump a:hover,
.faq-jump a:focus-visible {
  background: var(--c-turf-hi);
  border-color: var(--line-strong);
  border-left-color: var(--c-score);
}

.faq-hero-figure {
  margin: 0;
}

.faq-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--line-hair);
}

/* ---------- 索引轨与正文 ---------- */
.page-faq .layout-rail {
  display: grid;
  gap: 0;
  padding-block: 30px 0;
}

.page-faq .rail-index {
  border-top: 1px solid var(--line-hair);
  border-bottom: 1px solid var(--line-hair);
  padding: 16px 0;
}

.page-faq .rail-title {
  margin: 0 0 12px;
  font-family: var(--font-narrow);
  font-size: var(--fs-14);
  letter-spacing: .06em;
  color: var(--ink-faint);
}

.page-faq .toc-list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0 0 2px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .toc-link {
  display: block;
  white-space: nowrap;
  padding: 6px 10px;
  border-left: 2px solid transparent;
  font-family: var(--font-narrow);
  font-size: var(--fs-14);
  color: var(--ink-dim);
  text-decoration: none;
  transition: color 140ms ease, background-color 140ms ease;
}

.page-faq .toc-link:hover {
  color: var(--c-lamp);
  background: var(--c-turf-hi);
}

.page-faq .toc-link.is-active {
  color: var(--c-lamp);
  border-left-color: var(--c-score);
  background: var(--c-turf-hi);
}

/* ---------- 章节 ---------- */
.faq-block {
  padding-block: 34px 44px;
  border-top: 1px solid var(--line-hair);
}

.faq-block:first-child {
  border-top: 0;
  padding-top: 26px;
}

.faq-block-head {
  display: grid;
  gap: 10px;
}

.faq-block-index {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: .06em;
  color: var(--c-score);
}

.faq-block h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(24px, 5vw, 34px);
  line-height: 1.2;
  letter-spacing: -.008em;
}

.faq-block-lede {
  margin: 0;
  max-width: 64ch;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--ink-dim);
}

/* ---------- 折叠问答 ---------- */
.faq-list {
  margin-top: 20px;
}

.qa {
  border-top: 1px solid var(--line-hair);
}

.faq-list .qa:last-child {
  border-bottom: 1px solid var(--line-hair);
}

.qa-q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) 14px;
  align-items: start;
  gap: 12px;
  padding: 18px var(--faq-bleed);
  margin-inline: calc(var(--faq-bleed) * -1);
  cursor: pointer;
  list-style: none;
  transition: background-color 160ms ease;
}

.qa-q::-webkit-details-marker {
  display: none;
}

.qa-q:hover {
  background: var(--c-turf-hi);
}

.qa-q:focus-visible {
  outline: 2px solid var(--c-data);
  outline-offset: -2px;
}

.qa-num {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.75;
  letter-spacing: .04em;
  color: var(--c-score);
}

.qa-text {
  min-width: 0;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--fs-16);
  line-height: 1.7;
  color: var(--c-lamp);
}

.qa-mark {
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 6px;
}

.qa-mark::before,
.qa-mark::after {
  content: "";
  position: absolute;
  background: var(--c-lamp);
}

.qa-mark::before {
  left: 0;
  right: 0;
  top: calc(50% - .5px);
  height: 1px;
}

.qa-mark::after {
  top: 0;
  bottom: 0;
  left: calc(50% - .5px);
  width: 1px;
  transition: transform 180ms ease;
}

.qa[open] .qa-q {
  background: var(--c-turf-hi);
}

.qa[open] .qa-mark::after {
  transform: scaleY(0);
}

.qa-a {
  padding: 4px var(--faq-bleed) 22px;
  margin-inline: calc(var(--faq-bleed) * -1);
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--ink-dim);
}

.qa-a p {
  margin: 0 0 12px;
}

.qa-a p:last-child {
  margin-bottom: 0;
}

.qa-a a {
  color: var(--c-data);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.qa-a a:hover {
  color: var(--c-lamp);
}

.qa-lead {
  padding-left: 14px;
  border-left: 2px solid var(--c-score);
  font-weight: 600;
  color: var(--c-lamp);
}

.qa-steps {
  display: grid;
  gap: 10px;
  margin: 0 0 12px;
  padding: 0;
  list-style: none;
}

.qa-steps li {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
}

.qa-step-num {
  padding: 1px 0;
  border: 1px solid var(--line-hair);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  text-align: center;
  color: var(--c-data);
}

.qa-note {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--ink-faint);
}

/* ---------- 桌面端操作：图文并排 ---------- */
.ops-grid {
  display: grid;
  gap: 22px;
  margin-top: 20px;
}

.ops-figure {
  margin: 0;
}

.ops-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--line-hair);
}

.ops-caption {
  margin: 10px 0 0;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--ink-faint);
}

.faq-list--ops {
  margin-top: 0;
}

/* ---------- 收尾联系 ---------- */
.faq-contact {
  margin-top: 26px;
  padding: 26px 20px;
  border: 1px solid var(--line-grid);
  background: linear-gradient(180deg, rgba(6, 35, 27, .82), var(--c-night));
}

.faq-contact-grid {
  display: grid;
  gap: 24px;
}

.faq-contact h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(22px, 4.2vw, 30px);
  line-height: 1.24;
}

.faq-contact p {
  margin: 0 0 12px;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--ink-dim);
}

.faq-mail {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--fs-16);
  color: var(--c-lamp);
  text-decoration: none;
  border-bottom: 1px solid var(--c-score);
  word-break: break-all;
}

.faq-mail:hover {
  color: var(--c-score);
}

.faq-tel {
  font-family: var(--font-narrow);
  color: var(--c-lamp);
}

.faq-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.faq-checklist-title {
  margin: 0 0 14px;
  padding-top: 16px;
  border-top: 1px solid var(--line-hair);
  font-family: var(--font-narrow);
  font-size: var(--fs-14);
  letter-spacing: .04em;
  color: var(--c-data);
}

.faq-checklist {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.faq-checklist li {
  position: relative;
  padding-left: 18px;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--ink-dim);
}

.faq-checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 10px;
  height: 1px;
  background: var(--c-score);
}

/* ---------- 自适应 ---------- */
@media (min-width: 720px) {
  .faq-hero-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: center;
    gap: 34px;
    padding-block: 42px 52px;
  }

  .faq-lede {
    font-size: var(--fs-18);
  }

  .qa-q {
    padding-block: 20px;
  }

  .qa-text {
    font-size: var(--fs-18);
  }

  .faq-contact {
    padding: 34px 32px;
  }
}

@media (min-width: 1000px) {
  .page-faq .layout-rail {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    padding-block: 46px 0;
  }

  .page-faq .rail-index {
    position: sticky;
    top: var(--stick-top);
    align-self: start;
    border-bottom: 0;
    padding: 4px 0 40px;
  }

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

  .page-faq .toc-link {
    padding: 9px 12px;
  }

  .page-faq .rail-body {
    padding-left: var(--faq-gap);
    border-left: 1px solid var(--line-soft);
  }

  .faq-block {
    padding-block: 44px 56px;
  }

  .faq-block:first-child {
    padding-top: 6px;
  }

  .ops-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 34px;
    align-items: start;
  }

  .ops-figure {
    position: sticky;
    top: var(--stick-top);
  }

  .faq-contact-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: 40px;
    align-items: start;
  }
}

@media (min-width: 1280px) {
  .page-faq {
    --faq-rail: 264px;
    --faq-gap: 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .toc-link,
  .qa-q,
  .qa-mark::after,
  .faq-jump a {
    transition: none;
  }
}
</final>