.page-faq {
  --faq-gap: clamp(14px, 2.2vw, 22px);
  --faq-rail-w: 268px;
  --faq-ring: 2px solid var(--line);
  padding-bottom: clamp(48px, 8vw, 100px);
}

.page-faq .breadcrumb {
  padding-top: clamp(16px, 3vw, 28px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(20px, 4vw, 40px) 0 clamp(30px, 5vw, 60px);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--lime) 0 18%, var(--line) 18% 100%);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  align-items: center;
}

.page-faq .faq-hero h1 {
  margin: 10px 0 16px;
  font-family: var(--font-title);
  font-size: clamp(32px, 7vw, 60px);
  font-weight: 800;
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--mist);
  text-wrap: balance;
}

.page-faq .faq-hero__lead {
  max-width: 54ch;
  margin: 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--sage);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.page-faq .faq-hero__figure {
  margin: 0;
  padding: 8px;
  border: var(--faq-ring);
  background: var(--ink-3);
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

.page-faq .faq-hero__figure figcaption {
  padding: 8px 4px 2px;
  font-family: var(--font-data);
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--sage);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  padding-top: clamp(30px, 5vw, 60px);
}

/* ---------- 侧栏索引 ---------- */
.page-faq .faq-rail {
  border: var(--faq-ring);
  background: var(--ink-2);
  padding: 18px 16px;
}

.page-faq .faq-rail__title {
  margin: 0 0 14px;
  padding-left: 10px;
  border-left: 4px solid var(--lime);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--lime);
}

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

.page-faq .faq-rail__link {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  padding: 11px 6px;
  border-bottom: 1px solid var(--line);
  color: var(--mist);
  text-decoration: none;
  font-size: 15px;
  line-height: 1.4;
  transition: color 0.2s var(--ease), background 0.2s var(--ease), padding-left 0.2s var(--ease);
}

.page-faq .faq-rail__list li:last-child .faq-rail__link {
  border-bottom: 0;
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  padding-left: 12px;
  background: var(--ink-3);
  color: var(--lime);
  outline: none;
}

.page-faq .faq-rail__num {
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--orange);
}

.page-faq .faq-rail__count {
  font-family: var(--font-data);
  font-size: 11px;
  color: var(--sage);
  border: 1px solid var(--line);
  padding: 1px 6px;
}

.page-faq .faq-rail__note {
  margin: 16px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
  line-height: 1.75;
  color: var(--sage);
}

/* ---------- 问题组 ---------- */
.page-faq .faq-group {
  margin-bottom: clamp(34px, 5vw, 56px);
  scroll-margin-top: 104px;
}

.page-faq .faq-group:last-of-type {
  margin-bottom: 0;
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(12px, 2vw, 20px);
  align-items: start;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: var(--faq-ring);
}

.page-faq .faq-group__num {
  font-family: var(--font-data);
  font-size: clamp(26px, 4vw, 40px);
  line-height: 0.9;
  letter-spacing: -0.04em;
  color: var(--lime);
}

.page-faq .faq-group__title {
  margin: 0 0 6px;
  font-family: var(--font-title);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-faq .faq-group__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--sage);
}

/* ---------- 宽表示意图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 20px;
  padding: 8px;
  border: var(--faq-ring);
  background: var(--ink-2);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  padding: 8px 4px 2px;
  font-family: var(--font-data);
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--sage);
}

/* ---------- 问答折叠组 ---------- */
.page-faq .accordion {
  display: block;
}

.page-faq .accordion__item {
  margin-bottom: 10px;
  border: var(--faq-ring);
  background: var(--ink-2);
  border-radius: var(--radius-card);
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-faq .accordion__item:hover {
  border-color: var(--lime-dim);
}

.page-faq .accordion__item[data-open],
.page-faq .accordion__item:has(.accordion__trigger[aria-expanded="true"]) {
  border-color: var(--lime);
  background: var(--ink-3);
}

.page-faq .faq-q {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
  line-height: inherit;
}

.page-faq .accordion__trigger {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  width: 100%;
  margin: 0;
  padding: 16px 16px;
  border: 0;
  background: none;
  color: var(--mist);
  font-family: var(--font-body);
  font-size: clamp(15px, 1.6vw, 17px);
  font-weight: 700;
  line-height: 1.5;
  text-align: left;
  cursor: pointer;
  transition: color 0.2s var(--ease);
}

.page-faq .accordion__trigger:hover,
.page-faq .accordion__trigger:focus-visible {
  color: var(--lime);
  outline: none;
}

.page-faq .accordion__trigger:focus-visible {
  box-shadow: inset 0 0 0 2px var(--lime);
}

.page-faq .faq-q__index {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--orange);
}

.page-faq .faq-q__icon {
  position: relative;
  width: 22px;
  height: 22px;
  border: 2px solid var(--lime);
  flex: none;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease);
}

.page-faq .faq-q__icon::before,
.page-faq .faq-q__icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--lime);
  transform: translate(-50%, -50%);
  transition: transform 0.25s var(--ease), background 0.25s var(--ease);
}

.page-faq .faq-q__icon::before {
  width: 10px;
  height: 2px;
}

.page-faq .faq-q__icon::after {
  width: 2px;
  height: 10px;
}

.page-faq .accordion__trigger[aria-expanded="true"] .faq-q__icon {
  background: var(--lime);
  transform: rotate(90deg);
}

.page-faq .accordion__trigger[aria-expanded="true"] .faq-q__icon::before,
.page-faq .accordion__trigger[aria-expanded="true"] .faq-q__icon::after {
  background: var(--on-lime);
}

.page-faq .accordion__trigger[aria-expanded="true"] .faq-q__icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.page-faq .accordion__panel {
  display: none;
}

.page-faq .accordion__item[data-open] .accordion__panel,
.page-faq .accordion__panel[data-open],
.page-faq .accordion__trigger[aria-expanded="true"] + .accordion__panel {
  display: block;
}

.page-faq .accordion__body {
  padding: 14px 16px 18px;
  border-top: 1px solid var(--line);
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .accordion__body p {
  margin: 0 0 10px;
}

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

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

.page-faq .accordion__body a:hover {
  color: var(--lime-dim);
}

/* ---------- 底部联系 ---------- */
.page-faq .faq-cta {
  margin-top: clamp(40px, 6vw, 72px);
  padding: clamp(22px, 4vw, 40px);
  border: 2px solid var(--lime);
  background: linear-gradient(135deg, var(--ink-3) 0%, var(--ink-2) 62%, var(--ink) 100%);
}

.page-faq .faq-cta__title {
  margin: 0 0 10px;
  font-family: var(--font-title);
  font-size: clamp(22px, 3.2vw, 32px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-faq .faq-cta__text {
  max-width: 52ch;
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--sage);
}

.page-faq .faq-cta__copy {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-cta__copy .copy-status {
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--lime);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero__figure,
  .page-faq .faq-figure {
    box-shadow: var(--shadow-soft);
  }

  .page-faq .accordion__item:hover {
    box-shadow: 4px 4px 0 var(--night);
  }
}

@media (min-width: 880px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }

  .page-faq .faq-hero__figure {
    box-shadow: var(--shadow-hard);
  }

  .page-faq .faq-cta {
    box-shadow: var(--shadow-hard);
  }
}

@media (min-width: 980px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    align-items: start;
  }

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

  .page-faq .faq-group__head {
    align-items: end;
  }
}

@media (max-width: 380px) {
  .page-faq .faq-hero__figure,
  .page-faq .faq-figure {
    padding: 5px;
  }

  .page-faq .accordion__trigger {
    gap: 9px;
    padding: 14px 12px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-faq .accordion__item,
  .page-faq .accordion__trigger,
  .page-faq .faq-q__icon,
  .page-faq .faq-q__icon::before,
  .page-faq .faq-q__icon::after,
  .page-faq .faq-rail__link {
    transition: none;
  }
}