.page-faq {
  --faq-sticky-top: calc(var(--header-h) + 12px);
  --faq-idx-w: 2.4em;
  padding-bottom: clamp(56px, 8vw, 120px);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: clamp(18px, 3.2vw, 44px);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-muted);
}

.page-faq .breadcrumb a {
  color: var(--c-dim);
  text-decoration: none;
  transition: color 0.18s ease;
}

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--c-lime);
}

.page-faq .breadcrumb__sep {
  color: var(--c-steel);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  padding: clamp(24px, 4.2vw, 54px) 0 clamp(28px, 4.2vw, 58px);
  border-bottom: 3px solid var(--c-steel);
}

.page-faq .faq-hero__title {
  margin: 0;
  max-width: 22ch;
  font-size: clamp(30px, 5.2vw, 60px);
  font-weight: 300;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--c-white);
}

.page-faq .faq-hero__lead {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--c-dim);
}

.page-faq .faq-hero__panel {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2px;
  margin: 0;
  background: var(--c-steel);
  border: 2px solid var(--c-steel);
  box-shadow: var(--hard-shadow-sm);
}

.page-faq .faq-hero__item {
  min-width: 0;
  padding: 16px 12px;
  background: var(--c-panel);
}

.page-faq .faq-hero__key {
  margin: 0 0 6px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--c-muted);
}

.page-faq .faq-hero__val {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(18px, 2.4vw, 28px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--c-lime);
}

.page-faq .faq-hero__val small {
  display: block;
  margin-top: 4px;
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--c-muted);
}

@media (min-width: 960px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.6fr) minmax(280px, 1fr);
    align-items: end;
  }
}

/* ---------- 分类快速跳转 ---------- */
.page-faq .faq-jump {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 8px;
  margin: clamp(22px, 3vw, 38px) 0 clamp(26px, 3.4vw, 46px);
  padding: 10px 12px;
  background: var(--c-panel-2);
  border: 2px solid var(--c-steel);
  box-shadow: var(--hard-shadow-sm);
}

.page-faq .faq-jump__label {
  flex: 0 0 auto;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--c-orange);
}

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

.page-faq .faq-jump__list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-jump__link {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 6px 11px;
  white-space: nowrap;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-dim);
  text-decoration: none;
  border: 2px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-faq .faq-jump__link:hover,
.page-faq .faq-jump__link:focus-visible {
  color: var(--c-lime);
  border-color: var(--c-lime);
}

.page-faq .faq-jump__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--c-orange);
}

@media (min-width: 720px) {
  .page-faq .faq-jump {
    flex-direction: row;
    align-items: center;
    gap: 14px;
    padding: 10px 14px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-jump {
    position: sticky;
    top: var(--faq-sticky-top);
    z-index: 6;
  }
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(34px, 4.4vw, 58px);
}

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

@media (min-width: 1040px) {
  .page-faq .faq-body {
    grid-template-columns: minmax(0, 1fr) 330px;
    align-items: start;
  }

  .page-faq .faq-side {
    position: sticky;
    top: calc(var(--header-h) + 78px);
  }
}

/* ---------- 分组标题 ---------- */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 86px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(40px, 5vw, 74px);
}

.page-faq .faq-group__head {
  display: grid;
  gap: 6px;
  padding-bottom: 16px;
  border-bottom: 3px solid var(--c-steel);
}

.page-faq .faq-group__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--c-orange);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(22px, 2.6vw, 32px);
  font-weight: 800;
  line-height: 1.2;
  color: var(--c-white);
}

.page-faq .faq-group__desc {
  margin: 0;
  max-width: 60ch;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--c-muted);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: clamp(18px, 2.4vw, 26px) 0 clamp(18px, 2.4vw, 28px);
}

.page-faq .faq-figure .media-frame {
  border-left: 4px solid var(--c-orange);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-list {
  display: grid;
}

.page-faq .faq-item {
  border-bottom: 2px solid var(--c-steel);
  border-left: 4px solid transparent;
  transition: background-color 0.2s ease, border-left-color 0.2s ease;
}

.page-faq .faq-item:hover {
  background: rgba(36, 52, 65, 0.34);
}

.page-faq .faq-item[open] {
  background: var(--c-panel);
  border-left-color: var(--c-lime);
}

.page-faq .faq-item__summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 18px 16px;
  list-style: none;
  cursor: pointer;
  user-select: none;
}

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

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

.page-faq .faq-item__idx {
  flex: 0 0 auto;
  min-width: var(--faq-idx-w);
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--c-muted);
}

.page-faq .faq-item[open] .faq-item__idx {
  color: var(--c-lime);
}

.page-faq .faq-item__q {
  flex: 1 1 auto;
  min-width: 0;
  font-size: clamp(15px, 1.5vw, 17px);
  font-weight: 600;
  line-height: 1.55;
  color: var(--c-white);
}

.page-faq .faq-item__summary:hover .faq-item__q,
.page-faq .faq-item__summary:focus-visible .faq-item__q {
  color: var(--c-lime);
}

.page-faq .faq-item__sign {
  position: relative;
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  margin-top: 5px;
  color: var(--c-lime);
}

.page-faq .faq-item__sign::before,
.page-faq .faq-item__sign::after {
  content: "";
  position: absolute;
  background: currentColor;
  transition: transform 0.22s ease, opacity 0.22s ease;
}

.page-faq .faq-item__sign::before {
  top: 50%;
  left: 0;
  width: 100%;
  height: 2px;
  transform: translateY(-50%);
}

.page-faq .faq-item__sign::after {
  top: 0;
  left: 50%;
  width: 2px;
  height: 100%;
  transform: translateX(-50%);
}

.page-faq .faq-item[open] .faq-item__sign::after {
  transform: translateX(-50%) scaleY(0);
  opacity: 0;
}

.page-faq .faq-item__a {
  padding: 0 16px 20px;
}

.page-faq .faq-item__a p {
  margin: 0 0 10px;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-dim);
}

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

.page-faq .faq-item__a strong {
  font-weight: 700;
  color: var(--c-white);
}

.page-faq .faq-item__a a {
  color: var(--c-lime);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-faq .faq-item__a a:hover,
.page-faq .faq-item__a a:focus-visible {
  color: var(--c-orange);
}

@media (min-width: 560px) {
  .page-faq .faq-item__a {
    padding-left: calc(16px + var(--faq-idx-w) + 12px);
  }
}

/* ---------- 联系卡 ---------- */
.page-faq .faq-contact {
  padding: clamp(20px, 2.4vw, 26px);
  background: var(--c-lime);
  color: var(--c-pitch);
  border: 3px solid var(--c-pitch);
  box-shadow: var(--hard-shadow-sm);
}

.page-faq .faq-contact__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: rgba(11, 15, 20, 0.62);
}

.page-faq .faq-contact__title {
  margin: 0 0 10px;
  font-size: clamp(20px, 2vw, 24px);
  font-weight: 800;
  line-height: 1.2;
  color: var(--c-pitch);
}

.page-faq .faq-contact__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(11, 15, 20, 0.78);
}

.page-faq .faq-contact__list {
  display: grid;
  gap: 14px;
  margin: 18px 0 0;
  padding: 16px 0 0;
  list-style: none;
  border-top: 2px solid rgba(11, 15, 20, 0.22);
}

.page-faq .faq-contact__key {
  display: block;
  margin-bottom: 4px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: rgba(11, 15, 20, 0.58);
}

.page-faq .faq-contact__val {
  display: block;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--c-pitch);
  overflow-wrap: anywhere;
}

.page-faq .faq-contact__links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin: 18px 0 0;
  padding: 14px 0 0;
  list-style: none;
  border-top: 2px solid rgba(11, 15, 20, 0.22);
}

.page-faq .faq-contact__links a {
  font-size: 13px;
  font-weight: 700;
  color: var(--c-pitch);
  text-decoration: none;
  border-bottom: 2px solid rgba(11, 15, 20, 0.32);
  transition: border-color 0.18s ease;
}

.page-faq .faq-contact__links a:hover,
.page-faq .faq-contact__links a:focus-visible {
  border-bottom-color: var(--c-pitch);
}

.page-faq .faq-contact__legal {
  margin: 16px 0 0;
  padding-top: 12px;
  border-top: 2px solid rgba(11, 15, 20, 0.22);
  font-size: 11.5px;
  line-height: 1.6;
  color: rgba(11, 15, 20, 0.62);
}

/* ---------- 窄屏微调 ---------- */
@media (max-width: 420px) {
  .page-faq .faq-hero__panel {
    grid-template-columns: 1fr;
  }

  .page-faq .faq-hero__item {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 14px;
  }

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

  .page-faq .faq-hero__val small {
    display: inline;
    margin: 0 0 0 4px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-jump__link,
  .page-faq .faq-item__sign::before,
  .page-faq .faq-item__sign::after,
  .page-faq .breadcrumb a,
  .page-faq .faq-contact__links a {
    transition: none;
  }
}