.page-faq {
  --faq-aside: 104px;
  --faq-answer-bg: var(--cream);
  --faq-answer-ink: var(--ink);
  --faq-hover: var(--amber);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  padding-top: 20px;
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.page-faq .faq-hero__copy h1 {
  margin: 12px 0 16px;
  font-family: var(--font-serif);
  font-size: clamp(30px, 7.4vw, 52px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--cream);
}

.page-faq .faq-hero__lede {
  max-width: 46ch;
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-hero__figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--night-deep);
  box-shadow: var(--shadow-panel);
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-faq .faq-hero__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11, 27, 43, 0) 45%, rgba(11, 27, 43, 0.72) 100%);
  pointer-events: none;
}

/* ---------- 主题跳转 ---------- */

.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 26px;
}

.page-faq .faq-jump__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-pill);
  background: var(--tier);
  color: var(--mist);
  font-size: 13px;
  line-height: 1;
  text-decoration: none;
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease),
    border-color 0.18s var(--ease);
}

.page-faq .faq-jump__item .mono {
  color: var(--green);
  font-size: 12px;
  transition: color 0.18s var(--ease);
}

.page-faq .faq-jump__item:hover,
.page-faq .faq-jump__item:focus-visible {
  background: var(--green);
  border-color: var(--green);
  color: var(--night);
}

.page-faq .faq-jump__item:hover .mono,
.page-faq .faq-jump__item:focus-visible .mono {
  color: var(--night);
}

/* ---------- 分组 ---------- */

.page-faq .faq-groups {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.page-faq .faq-group {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: 30px;
  padding-top: 30px;
  border-top: 1px solid var(--line);
  scroll-margin-top: 96px;
}

.page-faq .faq-group::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 64px;
  height: 2px;
  border-radius: 2px;
  background: var(--green);
}

.page-faq .faq-group__aside {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-faq .faq-group__num {
  margin: 0;
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--amber);
}

.page-faq .faq-group__label {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-faq .faq-group__title {
  margin: 0 0 12px;
  font-family: var(--font-serif);
  font-size: clamp(21px, 3.4vw, 29px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--cream);
}

/* ---------- 问答折叠 ---------- */

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

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

.page-faq .qa__head {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) 20px;
  align-items: start;
  gap: 12px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa__head::marker {
  content: "";
}

.page-faq .qa__head:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 4px;
  border-radius: var(--r-xs);
}

.page-faq .qa__idx {
  font-size: 13px;
  font-weight: 600;
  line-height: 1.85;
  color: var(--mist);
  transition: color 0.18s var(--ease);
}

.page-faq .qa:hover .qa__idx,
.page-faq .qa[open] .qa__idx {
  color: var(--faq-hover);
}

.page-faq .qa__q {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--cream);
  transition: color 0.18s var(--ease);
}

.page-faq .qa:hover .qa__q {
  color: var(--amber);
}

.page-faq .qa__caret {
  position: relative;
  width: 18px;
  height: 18px;
  margin-top: 6px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  transition: border-color 0.2s var(--ease);
}

.page-faq .qa__caret::before,
.page-faq .qa__caret::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--green);
  transform: translate(-50%, -50%);
}

.page-faq .qa__caret::before {
  width: 8px;
  height: 1.5px;
}

.page-faq .qa__caret::after {
  width: 1.5px;
  height: 8px;
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}

.page-faq .qa[open] .qa__caret {
  border-color: var(--amber);
}

.page-faq .qa[open] .qa__caret::before,
.page-faq .qa[open] .qa__caret::after {
  background: var(--amber);
}

.page-faq .qa[open] .qa__caret::after {
  transform: translate(-50%, -50%) scaleY(0);
  opacity: 0;
}

.page-faq .qa__body {
  margin: 0 0 18px;
  padding: 15px 17px;
  border-radius: var(--r-sm);
  background: var(--faq-answer-bg);
  color: var(--faq-answer-ink);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.78;
}

.page-faq .qa__body a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--ember);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  transition: color 0.18s var(--ease);
}

.page-faq .qa__body a:hover,
.page-faq .qa__body a:focus-visible {
  color: var(--ember);
}

/* ---------- 数据分组配图 ---------- */

.page-faq .faq-figure {
  margin: 22px 0 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--panel);
}

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

/* ---------- 底部引导 ---------- */

.page-faq .faq-cta__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  padding: 26px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(142deg, var(--tier) 0%, var(--night-deep) 100%);
  box-shadow: var(--shadow-float);
}

.page-faq .faq-cta__title {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: clamp(21px, 3.4vw, 29px);
  line-height: 1.3;
  color: var(--cream);
}

.page-faq .faq-cta__text {
  max-width: 52ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .faq-cta__meta {
  margin: 14px 0 0;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--green);
}

.page-faq .faq-cta__inner .btn {
  justify-self: start;
  white-space: nowrap;
}

/* ---------- 桌面 ---------- */

@media (min-width: 880px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 56px;
    align-items: center;
  }

  .page-faq .faq-group {
    grid-template-columns: var(--faq-aside) minmax(0, 1fr);
    gap: 44px;
    margin-top: 46px;
    padding-top: 44px;
  }

  .page-faq .faq-group__aside {
    flex-direction: column;
    gap: 8px;
  }

  .page-faq .faq-group__num {
    font-size: 32px;
  }

  .page-faq .qa__head {
    grid-template-columns: 34px minmax(0, 1fr) 22px;
    gap: 16px;
    padding: 19px 0;
  }

  .page-faq .qa__body {
    margin-left: 50px;
    padding: 18px 22px;
    font-size: 15.5px;
  }

  .page-faq .faq-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 36px;
    padding: 40px 44px;
  }
}

@media (min-width: 1120px) {
  .page-faq .faq-hero__figure img {
    aspect-ratio: 4 / 3;
  }
}

/* ---------- 减少动效 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-jump__item,
  .page-faq .qa__idx,
  .page-faq .qa__q,
  .page-faq .qa__caret,
  .page-faq .qa__caret::after,
  .page-faq .qa__body a {
    transition: none;
  }
}