.page-faq {
  --faq-card: #ffffff;
  --faq-muted: #5f6560;
  --faq-soft: rgba(178, 58, 46, 0.06);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-top: calc(var(--header-h) + clamp(22px, 5vw, 54px));
  padding-bottom: clamp(38px, 6vw, 76px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: min(760px, 68%);
  height: clamp(8px, 1.6vw, 16px);
  background: linear-gradient(90deg, var(--laterite), var(--violet));
  clip-path: polygon(0 100%, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -12%;
  top: -30%;
  width: min(520px, 62vw);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle at 42% 42%, rgba(198, 242, 78, 0.16), transparent 62%);
  pointer-events: none;
}

.page-faq .faq-hero > .wrap {
  position: relative;
  z-index: 1;
}

.page-faq .breadcrumbs {
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-faq .breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
}

.page-faq .breadcrumbs__item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: rgba(243, 237, 228, 0.68);
}

.page-faq .breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  color: rgba(243, 237, 228, 0.34);
}

.page-faq .breadcrumbs__item a {
  color: rgba(243, 237, 228, 0.68);
  text-decoration: none;
  transition: color 0.18s var(--ease);
}

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

.page-faq .breadcrumbs__item[aria-current="page"] {
  color: var(--lime);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: center;
}

.page-faq .faq-hero__title {
  margin: 10px 0 0;
  font-size: clamp(29px, 5.4vw, 52px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-hero__lede {
  margin-top: 16px;
  color: rgba(243, 237, 228, 0.84);
}

.page-faq .faq-hero__quick {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__quick a {
  display: inline-block;
  padding: 7px 12px;
  border: 1px solid var(--line-light);
  border-radius: var(--radius);
  background: var(--glass);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: rgba(243, 237, 228, 0.92);
  text-decoration: none;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-faq .faq-hero__quick a:hover {
  color: var(--lime);
  border-color: var(--lime);
  background: rgba(198, 242, 78, 0.08);
}

.page-faq .faq-hero__media {
  margin: 0;
  border: 1px solid var(--line-light);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--teal-2);
}

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

/* ---------- 主体骨架 ---------- */
.page-faq .faq-body {
  padding-block: clamp(36px, 6vw, 72px);
}

.page-faq .faq-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

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

/* ---------- 筛选条 ---------- */
.page-faq .filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: clamp(22px, 3.4vw, 34px);
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line-dark);
}

.page-faq .filter-bar .tag {
  padding: 7px 12px;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  background: var(--faq-card);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  line-height: 1.4;
  cursor: pointer;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-faq .filter-bar .tag:hover {
  color: var(--laterite);
  border-color: var(--laterite);
}

.page-faq .filter-bar .tag[aria-pressed="true"] {
  background: var(--laterite);
  border-color: var(--laterite);
  color: var(--paper);
}

.page-faq .filter-count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--faq-muted);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  margin-top: clamp(26px, 4vw, 44px);
  padding-top: clamp(22px, 3.6vw, 36px);
  border-top: 1px solid var(--line-dark);
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-faq .faq-group:first-of-type {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "num title"
    "num sub"
    "tools tools";
  gap: 2px 14px;
  align-items: center;
  margin-bottom: 16px;
}

.page-faq .faq-group__num {
  grid-area: num;
  align-self: start;
  font-family: var(--font-num);
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--laterite);
}

.page-faq .faq-group__title {
  grid-area: title;
  margin: 0;
  font-size: clamp(19px, 2.4vw, 23px);
  line-height: 1.35;
  color: var(--ink);
}

.page-faq .faq-group__sub {
  grid-area: sub;
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--archive);
}

.page-faq .faq-group__tools {
  grid-area: tools;
  justify-self: start;
  margin-top: 10px;
}

/* ---------- 问答组 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 8px;
}

.page-faq .faq-list .qa {
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  background: var(--faq-card);
  overflow: hidden;
  transition: border-color 0.18s var(--ease), box-shadow 0.18s var(--ease);
}

.page-faq .faq-list .qa:hover {
  border-color: rgba(178, 58, 46, 0.42);
}

.page-faq .faq-list .qa:focus-within {
  border-color: var(--laterite);
  box-shadow: 0 0 0 2px rgba(178, 58, 46, 0.14);
}

.page-faq .qa__trigger {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  width: 100%;
  padding: 13px 16px;
  border: 0;
  background: none;
  text-align: left;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--ink);
  cursor: pointer;
  transition: background 0.18s var(--ease);
}

.page-faq .qa__trigger:hover {
  background: var(--faq-soft);
}

.page-faq .qa__idx {
  flex: none;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--laterite);
}

.page-faq .qa__q {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .qa__arrow {
  flex: none;
  width: 8px;
  height: 8px;
  margin-top: 8px;
  border-top: 2px solid var(--laterite);
  border-right: 2px solid var(--laterite);
  transform: rotate(135deg);
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .qa__trigger[aria-expanded="true"] .qa__arrow {
  transform: rotate(-45deg);
  border-color: var(--lime);
}

.page-faq .qa__body {
  padding: 0 16px 16px 16px;
  border-top: 1px solid var(--line-dark);
  margin-top: 0;
}

.page-faq .qa__body p {
  margin: 12px 0 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--faq-muted);
}

.page-faq .qa__body p:first-child {
  margin-top: 14px;
}

/* ---------- 示意图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 16px;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--teal);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  padding: 9px 14px;
  border-top: 1px solid var(--line-light);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: rgba(243, 237, 228, 0.72);
}

/* ---------- 右侧目录 ---------- */
.page-faq .faq-toc__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--archive);
}

.page-faq .toc {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  border-top: 1px solid var(--line-dark);
  padding-top: 12px;
}

.page-faq .toc__link {
  display: block;
  padding: 7px 10px;
  border-left: 2px solid transparent;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ink);
  text-decoration: none;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-faq .toc__link:hover {
  color: var(--laterite);
  border-left-color: var(--laterite);
  background: var(--faq-soft);
}

.page-faq .toc__link[aria-current="true"] {
  color: var(--laterite);
  border-left-color: var(--lime);
  background: var(--faq-soft);
}

/* ---------- 底部指引 ---------- */
.page-faq .faq-cta {
  padding-block: clamp(34px, 5.5vw, 64px);
}

.page-faq .faq-cta__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 36px);
  align-items: center;
}

.page-faq .faq-cta__title {
  margin: 8px 0 0;
  font-size: clamp(21px, 3vw, 30px);
  line-height: 1.32;
  color: var(--paper);
}

.page-faq .faq-cta__text {
  margin: 12px 0 0;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(243, 237, 228, 0.8);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 中屏 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-group__head {
    grid-template-columns: auto minmax(0, 1fr) auto;
    grid-template-areas:
      "num title tools"
      "num sub tools";
    gap: 3px 16px;
  }

  .page-faq .faq-group__tools {
    grid-area: tools;
    justify-self: end;
    align-self: center;
    margin-top: 0;
  }

  .page-faq .qa__body {
    padding: 0 20px 18px 20px;
  }

  .page-faq .qa__body p {
    padding-left: 34px;
  }

  .page-faq .faq-cta__inner {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  }

  .page-faq .faq-cta__actions {
    justify-content: flex-end;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1000px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  }

  .page-faq .faq-shell {
    grid-template-columns: minmax(0, 1fr) 224px;
    gap: clamp(32px, 4vw, 56px);
  }

  .page-faq .faq-toc {
    position: sticky;
    top: calc(var(--header-h) + 26px);
  }

  .page-faq .toc {
    display: grid;
    gap: 1px;
  }

  .page-faq .faq-figure {
    margin-bottom: 20px;
  }
}

@media (min-width: 1180px) {
  .page-faq .qa__trigger {
    padding: 15px 20px;
  }
}