.page-faq {
  --faq-gap: clamp(20px, 3.4vw, 40px);
  --faq-pad: clamp(18px, 2.6vw, 30px);
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-topbar {
  padding-top: clamp(20px, 3vw, 34px);
}

.page-faq .crumbs {
  font-size: var(--fs-sm);
  color: var(--muted);
}

.page-faq .crumbs a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 200ms var(--ease), border-color 200ms var(--ease);
}

.page-faq .crumbs a:hover,
.page-faq .crumbs a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-faq .crumbs__sep {
  opacity: 0.6;
  padding: 0 6px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  padding-top: clamp(22px, 3.6vw, 44px);
  padding-bottom: clamp(36px, 6vw, 72px);
}

.page-faq .faq-hero__media {
  margin: 0;
  order: 2;
}

.page-faq .faq-hero__media .media__frame {
  position: relative;
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-faq .faq-hero__media .media__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 3;
  object-fit: cover;
}

.page-faq .faq-hero__media .media__caption {
  margin-top: 11px;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.05em;
  line-height: 1.6;
  color: var(--muted);
}

.page-faq .faq-hero__body {
  order: 1;
}

.page-faq .faq-hero__kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-faq .faq-hero__title {
  margin: 0 0 18px;
  font-size: var(--fs-xxl);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.14;
  color: var(--paper);
  max-width: 20ch;
}

.page-faq .faq-hero__lede {
  margin: 0 0 26px;
  max-width: 60ch;
  color: var(--paper);
  opacity: 0.82;
  line-height: 1.8;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 问答台 ---------- */
.page-faq .faq-desk {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 56px);
  padding-bottom: clamp(52px, 8vw, 96px);
}

/* 左侧分组索引 */
.page-faq .faq-index {
  background: linear-gradient(180deg, var(--panel) 0%, rgba(14, 42, 34, 0.68) 100%);
  border: 1px solid var(--line);
  padding: var(--faq-pad);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-faq .faq-index__title {
  margin: 0 0 16px;
  padding-bottom: 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: row;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-faq .faq-index__list > li {
  flex: 0 0 auto;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 9px 13px;
  border-left: 2px solid transparent;
  font-size: var(--fs-sm);
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  transition: color 200ms var(--ease), background-color 200ms var(--ease),
    border-color 200ms var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--paper);
  background: var(--panel-2);
}

.page-faq .faq-index__link[aria-current="true"] {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: var(--panel-2);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-faq .faq-index__label {
  display: inline-block;
}

.page-faq .faq-index__hint {
  margin: 20px 0 0;
  font-size: var(--fs-sm);
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-index__hint::before {
  content: "";
  display: block;
  height: 6px;
  margin-bottom: 12px;
  background-image: repeating-linear-gradient(
    90deg,
    currentColor 0 1px,
    transparent 1px 12px
  );
  color: var(--muted);
  opacity: 0.55;
}

/* ---------- 右侧问答面板 ---------- */
.page-faq .faq-panels {
  display: flex;
  flex-direction: column;
  gap: clamp(38px, 5vw, 64px);
  min-width: 0;
}

.page-faq .faq-group {
  min-width: 0;
  scroll-margin-top: 132px;
}

.page-faq .faq-group__head {
  margin-bottom: clamp(16px, 2.4vw, 26px);
}

.page-faq .faq-group__num {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.2em;
  color: var(--gold);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: var(--fs-xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.28;
  color: var(--paper);
}

.page-faq .faq-group__title::before {
  content: "";
  display: inline-block;
  width: 22px;
  height: 2px;
  margin-right: 12px;
  vertical-align: middle;
  background: linear-gradient(90deg, var(--orange), var(--cyan));
  transform: skewX(-32deg);
}

.page-faq .faq-group__media {
  margin: 0 0 clamp(18px, 2.6vw, 28px);
}

.page-faq .faq-group__media .media__frame {
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-faq .faq-group__media .media__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
}

.page-faq .faq-group__media .media__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.05em;
  color: var(--muted);
}

/* ---------- 折叠问答条 ---------- */
.page-faq .faq-list {
  display: flex;
  flex-direction: column;
}

.page-faq .faq-item {
  border-top: 1px solid var(--line-soft);
  transition: transform 240ms var(--ease), background-color 240ms var(--ease),
    border-color 240ms var(--ease), box-shadow 240ms var(--ease);
}

.page-faq .faq-item:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-item[open] {
  border-top-color: var(--line);
  background: linear-gradient(90deg, rgba(47, 243, 208, 0.06), transparent 70%);
  box-shadow: inset 2px 0 0 var(--cyan);
  transform: translateX(-4px);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: clamp(14px, 2vw, 20px) clamp(8px, 1.6vw, 16px);
  cursor: pointer;
  list-style: none;
  font-size: var(--fs-base);
  font-weight: 500;
  line-height: 1.6;
  color: var(--paper);
  transition: color 200ms var(--ease);
}

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

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

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

.page-faq .faq-item__q::after {
  content: "";
  flex: 0 0 auto;
  width: 11px;
  height: 11px;
  margin-left: auto;
  margin-top: 7px;
  border-right: 1.5px solid var(--muted);
  border-bottom: 1.5px solid var(--muted);
  transform: rotate(45deg);
  transition: transform 240ms var(--ease), border-color 240ms var(--ease);
}

.page-faq .faq-item[open] .faq-item__q::after {
  transform: rotate(-135deg);
  border-color: var(--cyan);
}

.page-faq .faq-item__mark {
  flex: 0 0 auto;
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.08em;
  color: var(--muted);
  transition: color 200ms var(--ease);
}

.page-faq .faq-item[open] .faq-item__mark {
  color: var(--cyan);
}

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

.page-faq .faq-item__a {
  padding: 0 clamp(8px, 1.6vw, 16px) clamp(18px, 2.4vw, 24px)
    clamp(46px, 5vw, 58px);
  font-size: var(--fs-sm);
  line-height: 1.9;
  color: var(--muted);
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 62ch;
}

.page-faq .faq-item__a p + p {
  margin-top: 10px;
}

.page-faq .faq-item__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 243, 208, 0.35);
  transition: border-color 200ms var(--ease);
}

.page-faq .faq-item__a a:hover,
.page-faq .faq-item__a a:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ---------- 结尾行动 ---------- */
.page-faq .faq-cta {
  padding-bottom: clamp(56px, 8vw, 104px);
}

.page-faq .faq-cta__inner {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 4vw, 46px);
  background: var(--panel);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-faq .faq-cta__inner::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -90px;
  width: 240px;
  height: 240px;
  background: radial-gradient(circle at 32% 32%, rgba(47, 243, 208, 0.2), transparent 68%);
  pointer-events: none;
}

.page-faq .faq-cta__num {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.2em;
  color: var(--gold);
}

.page-faq .faq-cta__title {
  margin: 0 0 14px;
  font-size: var(--fs-lg);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.3;
  color: var(--paper);
}

.page-faq .faq-cta__text {
  margin: 0 0 24px;
  max-width: 58ch;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 桌面端 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    align-items: center;
    gap: clamp(32px, 5vw, 72px);
  }

  .page-faq .faq-hero__media {
    order: 1;
  }

  .page-faq .faq-hero__body {
    order: 2;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-desk {
    grid-template-columns: 248px minmax(0, 1fr);
    gap: clamp(36px, 5vw, 72px);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 132px;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 2px;
    overflow-x: visible;
  }

  .page-faq .faq-index__list > li {
    flex: 1 1 auto;
  }

  .page-faq .faq-index__link {
    width: 100%;
    box-sizing: border-box;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-group__title {
    font-size: var(--fs-xl);
  }
}

/* ---------- 减弱动态 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item__q,
  .page-faq .faq-item__q::after,
  .page-faq .faq-item__mark,
  .page-faq .faq-index__link,
  .page-faq .crumbs a {
    transition: none;
  }

  .page-faq .faq-item[open] {
    transform: none;
  }
}