.page-faq {
  --faq-stagger: 34px;
  color: var(--mist);
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  position: relative;
  padding: calc(var(--header-h) + clamp(36px, 7vw, 72px)) 0 clamp(40px, 6vw, 68px);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 80px 80px;
  opacity: 0.4;
  pointer-events: none;
  -webkit-mask-image: radial-gradient(120% 90% at 15% 0%, #000 0%, transparent 68%);
  mask-image: radial-gradient(120% 90% at 15% 0%, #000 0%, transparent 68%);
}

.page-faq .faq-hero__inner {
  position: relative;
  display: grid;
  gap: clamp(30px, 5vw, 56px);
  align-items: end;
}

.page-faq .faq-hero__eyebrow {
  margin: clamp(22px, 4vw, 34px) 0 0;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 7.4vw, 78px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--mist);
}

.page-faq .faq-hero__lede {
  margin: 20px 0 0;
  max-width: 46ch;
  color: var(--stone);
  font-size: 16px;
  line-height: 1.75;
}

.page-faq .faq-jump {
  list-style: none;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-jump__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: rgba(13, 35, 56, 0.55);
  color: var(--mist);
  font-size: 14px;
  text-decoration: none;
  transition: border-color 220ms var(--ease), color 220ms var(--ease), background-color 220ms var(--ease);
}

.page-faq .faq-jump__link .mono {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-faq .faq-jump__link:hover,
.page-faq .faq-jump__link:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(53, 240, 208, 0.08);
}

.page-faq .faq-hero__media {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  background: linear-gradient(155deg, var(--ink-700), var(--ink-900));
}

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

.page-faq .faq-hero__media .media-caption {
  display: block;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--stone);
  border-top: 1px solid var(--line);
}

/* ============ 分组 ============ */
.page-faq .faq-group {
  padding: clamp(48px, 7vw, 84px) 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 14px;
  row-gap: 8px;
  align-items: baseline;
  margin-bottom: clamp(24px, 4vw, 42px);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 2.8vw, 34px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--mist);
  transition: color 240ms var(--ease);
}

.page-faq .faq-group__note {
  grid-column: 2;
  margin: 0;
  max-width: 62ch;
  color: var(--stone);
  font-size: 14px;
  line-height: 1.65;
}

.page-faq .faq-group:target .faq-group__title {
  color: var(--cyan);
}

.page-faq .faq-group:target .index-num {
  color: var(--amber);
}

/* ============ 问答卡片 ============ */
.page-faq .faq-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-faq .faq-card {
  min-width: 0;
  border: 1px solid var(--line);
  background: rgba(13, 35, 56, 0.6);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.35);
  transition: border-color 260ms var(--ease), box-shadow 260ms var(--ease), background-color 260ms var(--ease);
}

.page-faq .faq-card:hover {
  border-color: #2A4A66;
}

.page-faq .faq-card[open] {
  border-color: var(--cyan);
  background: rgba(13, 35, 56, 0.92);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
}

.page-faq .faq-card__q {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 17px 18px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 16px;
  line-height: 1.5;
  color: var(--mist);
}

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

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

.page-faq .faq-card__q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .faq-card__mark {
  position: relative;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  margin-top: 5px;
}

.page-faq .faq-card__mark::before,
.page-faq .faq-card__mark::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform 240ms var(--ease), opacity 240ms var(--ease);
}

.page-faq .faq-card__mark::before {
  left: 0;
  right: 0;
  top: 6px;
  height: 1.5px;
}

.page-faq .faq-card__mark::after {
  top: 0;
  bottom: 0;
  left: 6px;
  width: 1.5px;
}

.page-faq .faq-card[open] .faq-card__mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-card__a {
  padding: 0 18px 20px;
  border-top: 1px solid var(--line);
  margin-top: 2px;
  padding-top: 14px;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.72;
}

.page-faq .faq-card__a > p {
  margin: 0 0 12px;
}

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

.page-faq .faq-card__loc {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.03em;
  color: var(--stone);
}

.page-faq .faq-card__loc-key {
  padding: 2px 7px;
  border: 1px solid var(--line);
  color: var(--cyan);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.page-faq .faq-card__a .text-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 240, 208, 0.4);
}

.page-faq .faq-card__a .text-link:hover,
.page-faq .faq-card__a .text-link:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ============ 横向提示带 ============ */
.page-faq .faq-tip {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 0;
  padding: 16px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.6;
  color: var(--stone);
}

.page-faq .faq-tip__line {
  flex: 0 0 auto;
  width: 46px;
  height: 2px;
  background: var(--amber);
}

/* ============ 费用分栏 ============ */
.page-faq .faq-fee__media {
  margin: clamp(28px, 5vw, 40px) 0 0;
  border: 1px solid var(--line);
  background: var(--ink-700);
}

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

.page-faq .faq-fee__media .media-caption {
  display: block;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--stone);
  border-top: 1px solid var(--line);
}

/* ============ 联系我们 ============ */
.page-faq .faq-help__inner {
  display: grid;
  gap: clamp(26px, 4vw, 40px);
}

.page-faq .faq-help__lede {
  margin: 16px 0 0;
  max-width: 58ch;
  color: var(--stone);
  font-size: 15px;
  line-height: 1.75;
}

.page-faq .faq-help__mail {
  color: var(--cyan);
  word-break: break-all;
}

.page-faq .faq-help__side {
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--amber);
  background: rgba(13, 35, 56, 0.7);
}

.page-faq .faq-help__label {
  margin: 0 0 14px;
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-faq .faq-help__checklist {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 9px;
}

.page-faq .faq-help__checklist li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--mist);
}

.page-faq .faq-help__checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 1.5px;
  background: var(--cyan);
}

.page-faq .faq-help__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 20px 0 0;
}

/* ============ 响应式 ============ */
@media (min-width: 700px) {
  .page-faq .faq-card__q {
    font-size: 17px;
    padding: 19px 22px;
  }

  .page-faq .faq-card__a {
    padding: 16px 22px 22px;
  }

  .page-faq .faq-group__head {
    column-gap: 20px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: clamp(36px, 5vw, 72px);
  }

  .page-faq .faq-grid {
    grid-template-columns: minmax(0, 0.84fr) minmax(0, 1.16fr);
    gap: 20px;
  }

  .page-faq .faq-grid > .faq-card:nth-child(even) {
    margin-top: var(--faq-stagger);
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-fee {
    display: grid;
    grid-template-columns: minmax(0, 1.85fr) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 60px);
    align-items: start;
  }

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

  .page-faq .faq-fee .faq-grid > .faq-card:nth-child(even) {
    margin-top: 0;
  }

  .page-faq .faq-fee__media {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    margin-top: 0;
  }

  .page-faq .faq-help__inner {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.9fr);
    align-items: start;
    gap: clamp(36px, 5vw, 64px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-card,
  .page-faq .faq-card__mark::before,
  .page-faq .faq-card__mark::after,
  .page-faq .faq-jump__link,
  .page-faq .faq-group__title {
    transition: opacity 200ms linear;
  }
}