.page-faq {
  background: var(--ink-blue);
  color: var(--paper);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(82px, 11vw, 132px) 0 clamp(40px, 6vw, 76px);
  background: linear-gradient(155deg, var(--plum) 0%, var(--ink-blue) 58%);
  border-bottom: 1px solid rgba(245, 243, 236, 0.14);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -22%;
  right: -14%;
  width: clamp(240px, 46vw, 640px);
  height: clamp(240px, 46vw, 640px);
  background: radial-gradient(circle at 42% 42%, rgba(61, 123, 255, 0.34), rgba(61, 123, 255, 0) 64%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 46%;
  height: 2px;
  background: linear-gradient(90deg, var(--electric), rgba(198, 255, 61, 0.9) 55%, rgba(198, 255, 61, 0));
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(30px, 5vw, 46px);
}

.page-faq .faq-hero__eyebrow {
  margin: 20px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--lime);
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 5.2vw, 62px);
  line-height: 1.14;
  letter-spacing: -0.03em;
  color: var(--paper);
}

.page-faq .faq-hero__lead {
  margin: 20px 0 0;
  max-width: 54ch;
  font-family: var(--font-body);
  font-size: clamp(15px, 1.5vw, 17.5px);
  line-height: 1.85;
  color: rgba(245, 243, 236, 0.78);
}

.page-faq .faq-hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__media {
  position: relative;
  margin: 0;
  transform: rotate(-1.1deg);
}

.page-faq .faq-hero__media .media__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border: 1px solid rgba(245, 243, 236, 0.22);
  box-shadow: var(--shadow-layer);
}

.page-faq .faq-hero__media .media__caption {
  margin-top: 10px;
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.6;
  color: var(--grey-violet);
}

/* ---------- 主体 ---------- */
.page-faq .faq-body {
  padding: clamp(42px, 6vw, 82px) 0 clamp(58px, 8vw, 112px);
  background: var(--ink-blue);
}

.page-faq .faq-shell {
  display: grid;
  gap: clamp(26px, 4vw, 40px);
}

.page-faq .faq-jump {
  border-top: 1px solid rgba(245, 243, 236, 0.16);
  padding-top: 16px;
}

.page-faq .faq-jump__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--grey-violet);
}

.page-faq .faq-jump__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-jump__link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 6px 0;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.5;
  color: rgba(245, 243, 236, 0.72);
  text-decoration: none;
  border-radius: var(--radius);
  transition: color 0.16s ease;
}

.page-faq .faq-jump__no {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--lime);
}

.page-faq .faq-jump__link:hover {
  color: var(--paper);
}

.page-faq .faq-jump__link:focus-visible {
  outline: none;
  color: var(--paper);
  box-shadow: 0 0 0 2px var(--electric), 0 0 0 4px var(--lime);
}

/* ---------- 问答卡片 ---------- */
.page-faq .faq-stack {
  display: flex;
  flex-direction: column;
  gap: 22px;
  min-width: 0;
}

.page-faq .faq-card {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  border: 1px solid rgba(16, 16, 24, 0.14);
  border-left: 4px solid var(--electric);
  border-radius: var(--radius);
  box-shadow: var(--shadow-layer);
}

.page-faq .faq-card:nth-child(3n + 2) {
  border-left-color: var(--wine);
}

.page-faq .faq-card:nth-child(3n) {
  border-left-color: var(--teal);
}

.page-faq .faq-card__head {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px 16px;
  padding: clamp(18px, 2.8vw, 28px) clamp(18px, 3.2vw, 36px);
  cursor: pointer;
  list-style: none;
}

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

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

.page-faq .faq-card__head:focus-visible {
  outline: none;
  box-shadow: inset 0 0 0 2px var(--electric);
}

.page-faq .faq-card__num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(20px, 2.2vw, 30px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: rgba(16, 16, 24, 0.26);
}

.page-faq .faq-card__q {
  margin: 0;
  font-family: var(--font-sub);
  font-weight: 700;
  font-size: clamp(18px, 2.2vw, 25px);
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-card__mark {
  justify-self: end;
  width: 12px;
  height: 12px;
  border-right: 2px solid var(--electric);
  border-bottom: 2px solid var(--electric);
  transform: rotate(45deg);
  transition: transform 0.16s ease;
}

.page-faq .faq-card[open] .faq-card__mark {
  transform: rotate(225deg);
}

.page-faq .faq-card__a {
  padding: 0 clamp(18px, 3.2vw, 36px) clamp(20px, 3vw, 32px);
  border-top: 1px solid rgba(16, 16, 24, 0.1);
  margin-top: 0;
  padding-top: clamp(16px, 2.2vw, 24px);
  font-family: var(--font-body);
  font-size: clamp(15px, 1.05vw, 16.5px);
  line-height: 1.85;
  color: rgba(16, 16, 24, 0.86);
}

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

.page-faq .faq-card__a p + p {
  margin-top: 14px;
}

.page-faq .faq-card__a a {
  color: var(--electric);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-card__a a:hover {
  color: var(--plum);
}

.page-faq .faq-card__a a:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px var(--electric), 0 0 0 4px var(--lime);
  border-radius: var(--radius);
}

.page-faq .faq-term {
  text-decoration: underline;
  text-decoration-color: var(--lime);
  text-decoration-thickness: 3px;
  text-underline-offset: 3px;
  font-weight: 500;
}

.page-faq .faq-diagram {
  display: block;
  width: 100%;
  max-width: 440px;
  height: auto;
  margin: 18px 0 8px;
  color: var(--ink);
}

.page-faq .faq-diagram rect {
  fill: none;
  stroke: var(--electric);
  stroke-width: 1.5;
}

.page-faq .faq-diagram text {
  fill: rgba(16, 16, 24, 0.72);
  font-family: var(--font-body);
  font-size: 13px;
}

.page-faq .faq-diagram text.faq-diagram__note {
  fill: rgba(16, 16, 24, 0.52);
  font-size: 12px;
}

.page-faq .faq-card__media {
  margin: 18px 0 14px;
  border: 1px solid rgba(16, 16, 24, 0.16);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .faq-card__media .media__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

.page-faq .faq-card__media .media__caption {
  padding: 9px 12px 11px;
  background: rgba(16, 16, 24, 0.05);
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.6;
  color: rgba(16, 16, 24, 0.62);
}

/* ---------- 收束条 ---------- */
.page-faq .faq-tail {
  display: grid;
  gap: 12px;
  justify-items: start;
  margin-top: clamp(10px, 2vw, 20px);
  padding: clamp(22px, 3.2vw, 36px);
  background: linear-gradient(135deg, var(--plum), var(--ink-blue) 88%);
  border: 1px solid rgba(245, 243, 236, 0.18);
  border-radius: var(--radius);
}

.page-faq .faq-tail__title {
  margin: 0;
  font-family: var(--font-sub);
  font-weight: 700;
  font-size: clamp(18px, 2vw, 23px);
  line-height: 1.35;
  color: var(--paper);
}

.page-faq .faq-tail__text {
  margin: 0;
  max-width: 56ch;
  font-family: var(--font-body);
  font-size: clamp(14.5px, 1vw, 16px);
  line-height: 1.8;
  color: rgba(245, 243, 236, 0.76);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-stack {
    gap: 30px;
  }

  .page-faq .faq-card:nth-child(odd) {
    margin-left: clamp(16px, 4vw, 54px);
  }

  .page-faq .faq-card:nth-child(even) {
    margin-right: clamp(16px, 4vw, 54px);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.82fr);
    align-items: end;
    gap: clamp(40px, 6vw, 86px);
  }

  .page-faq .faq-hero__media {
    transform: rotate(-1.4deg) translateY(6px);
  }
}

@media (min-width: 960px) {
  .page-faq .faq-shell {
    grid-template-columns: 208px minmax(0, 1fr);
    align-items: start;
    gap: clamp(36px, 5vw, 76px);
  }

  .page-faq .faq-jump {
    position: sticky;
    top: calc(var(--header-h-condensed) + 28px);
  }

  .page-faq .faq-jump__list {
    flex-direction: column;
    gap: 2px;
  }

  .page-faq .faq-jump__link {
    padding: 7px 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-card__mark,
  .page-faq .faq-jump__link {
    transition: none;
  }

  .page-faq .faq-hero__media {
    transform: none;
  }
}