.page-faq {
  --faq-gap: clamp(24px, 3.4vw, 52px);
  --faq-card-bg: var(--paper-2);
  --faq-inner-gap: clamp(16px, 2vw, 24px);
  background: var(--paper);
  color: var(--brown);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(196, 98, 45, 0.06) 0%, rgba(196, 98, 45, 0) 62%),
    var(--paper);
  border-bottom: 1px solid var(--rule);
}

.page-faq .faq-hero__grid {
  position: relative;
  padding-top: clamp(10px, 2vw, 22px);
}

.page-faq .faq-hero__main {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__kicker {
  margin: 0 0 14px;
  color: var(--copper-deep);
  letter-spacing: 0.14em;
}

.page-faq .faq-hero__title {
  max-width: 17ch;
  margin: 0 0 20px;
  line-height: 1.08;
}

.page-faq .faq-hero__lead {
  max-width: 60ch;
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
}

.page-faq .faq-hero__glyph {
  position: absolute;
  top: -0.06em;
  right: -0.02em;
  z-index: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(84px, 17vw, 220px);
  line-height: 0.78;
  letter-spacing: -0.06em;
  color: var(--copper);
  opacity: 0.13;
  pointer-events: none;
  user-select: none;
}

.page-faq .faq-hero__quick {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 30px;
  list-style: none;
  margin: clamp(26px, 4vw, 46px) 0 0;
  padding: 16px 0 0;
  border-top: 1px solid var(--rule);
}

.page-faq .faq-hero__quick a {
  display: inline-flex;
  align-items: baseline;
  gap: 9px;
  font-size: 15px;
  color: var(--brown);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-hero__quick a .mono {
  font-size: 12px;
  color: var(--copper);
  letter-spacing: 0.08em;
}

.page-faq .faq-hero__quick a:hover,
.page-faq .faq-hero__quick a:focus-visible {
  color: var(--copper-deep);
  border-bottom-color: var(--copper);
}

/* ---------- 双栏骨架 ---------- */
.page-faq .faq-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  align-items: start;
}

.page-faq .faq-rail-wrap {
  position: relative;
}

.page-faq .faq-rail {
  position: sticky;
  top: var(--nav-h);
  z-index: 3;
  background: var(--paper);
  padding: 10px 0 6px;
  border-bottom: 1px solid var(--rule);
}

.page-faq .faq-rail .rail__title {
  margin: 0 0 10px;
  letter-spacing: 0.12em;
}

.page-faq .faq-rail .rail__list {
  display: flex;
  gap: 18px;
  list-style: none;
  margin: 0;
  padding: 0 0 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-rail .rail__list li {
  flex: 0 0 auto;
}

.page-faq .faq-rail .rail__link {
  white-space: nowrap;
}

.page-faq .faq-rail .rail__stamp {
  display: none;
}

/* ---------- 展板与分组 ---------- */
.page-faq .faq-answers {
  min-width: 0;
}

.page-faq .faq-group {
  margin: 0 0 clamp(40px, 5.2vw, 72px);
  scroll-margin-top: calc(var(--nav-h) + 24px);
}

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

.page-faq .faq-group__lede {
  max-width: 64ch;
  margin: 0 0 clamp(20px, 2.4vw, 30px);
  font-size: 16px;
  line-height: 1.85;
  color: var(--brown);
  opacity: 0.82;
}

.page-faq .faq-list {
  display: grid;
  gap: 18px;
}

/* ---------- 答案卡片 ---------- */
.page-faq .faq-card {
  position: relative;
  background: var(--faq-card-bg);
  border-left: 3px solid var(--brown);
  padding: clamp(18px, 2.4vw, 28px) clamp(16px, 2.2vw, 30px);
  scroll-margin-top: calc(var(--nav-h) + 24px);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
  transition: border-color var(--dur) var(--ease);
}

.page-faq .faq-card:hover,
.page-faq .faq-card:focus-within {
  border-left-color: var(--copper);
}

.page-faq .faq-card__q {
  margin: 0 0 12px;
  font-size: clamp(18px, 1.9vw, 22px);
  font-weight: 900;
  line-height: 1.42;
  letter-spacing: -0.01em;
  color: var(--brown);
}

.page-faq .faq-card__lead {
  margin: 0 0 14px;
  padding: 9px 14px;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.72;
  color: var(--copper-deep);
  background: rgba(196, 98, 45, 0.09);
  border-left: 2px solid var(--copper);
  word-break: break-word;
}

.page-faq .faq-card__bar {
  display: flex;
  justify-content: flex-end;
  margin: 0 0 12px;
}

.page-faq .faq-card__bar .copy-btn {
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-faq .faq-card__points {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-faq .faq-card__points li {
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 12px;
  font-size: 15.5px;
  line-height: 1.78;
}

.page-faq .faq-card__points li > span:last-child {
  min-width: 0;
}

.page-faq .faq-card__no {
  font-size: 12px;
  color: var(--copper);
  letter-spacing: 0.06em;
  border-top: 1px solid var(--copper);
  padding-top: 4px;
}

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

.page-faq .faq-arrow {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-style: italic;
  font-size: 14px;
  color: var(--copper-deep);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid var(--rule);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-arrow::after {
  content: "→";
  font-style: normal;
  transition: transform var(--dur) var(--ease);
}

.page-faq .faq-arrow:hover,
.page-faq .faq-arrow:focus-visible {
  color: var(--copper);
  border-bottom-color: var(--copper);
}

.page-faq .faq-arrow:hover::after,
.page-faq .faq-arrow:focus-visible::after {
  transform: translateX(4px);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: clamp(22px, 3vw, 36px) 0 0;
  max-width: 100%;
}

.page-faq .media-frame {
  max-width: 100%;
  overflow: hidden;
}

.page-faq .media-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-faq .media-frame__cap {
  letter-spacing: 0.08em;
}

/* ---------- 收尾 ---------- */
.page-faq .faq-close {
  border-top: 1px solid var(--rule-dark);
}

.page-faq .faq-close__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 3.6vw, 54px);
  align-items: center;
}

.page-faq .faq-close__title {
  margin: 0 0 16px;
  color: var(--paper);
}

.page-faq .faq-close__text {
  max-width: 58ch;
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--veil);
}

.page-faq .faq-close__list {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-faq .faq-close__list li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 12px 0;
  border-top: 1px solid var(--rule-dark);
}

.page-faq .faq-close__k {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq .faq-close__v {
  font-size: 15px;
  line-height: 1.72;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-close__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 16px;
  margin: clamp(22px, 3vw, 30px) 0 0;
}

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

/* ---------- 中等屏 ---------- */
@media (min-width: 620px) {
  .page-faq .faq-close__list li {
    grid-template-columns: 168px 1fr;
    gap: 16px;
    align-items: baseline;
  }
}

@media (min-width: 860px) {
  .page-faq .faq-close__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }
}

/* ---------- 桌面双栏 ---------- */
@media (min-width: 1000px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--rail) minmax(0, 1fr);
    gap: clamp(30px, 4.2vw, 68px);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--nav-h) + 22px);
    padding: 16px 0 0;
    border-bottom: 0;
    border-top: 2px solid var(--brown);
  }

  .page-faq .faq-rail .rail__list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-rail .rail__list li {
    flex: none;
  }

  .page-faq .faq-rail .rail__stamp {
    display: block;
    margin: 18px 0 0;
    padding-top: 12px;
    border-top: 1px solid var(--rule);
    font-size: 12px;
    color: var(--gray);
  }

  .page-faq .faq-answers {
    padding-top: 4px;
  }
}

/* ---------- 窄屏保护 ---------- */
@media (max-width: 619px) {
  .page-faq .faq-card {
    clip-path: none;
  }

  .page-faq .faq-hero__glyph {
    opacity: 0.09;
  }

  .page-faq .faq-card__points li {
    grid-template-columns: 26px 1fr;
    gap: 9px;
    font-size: 15px;
  }

  .page-faq .faq-close__links .btn {
    width: 100%;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-arrow::after,
  .page-faq .faq-card,
  .page-faq .faq-arrow,
  .page-faq .faq-hero__quick a {
    transition: none;
  }

  .page-faq .faq-arrow:hover::after,
  .page-faq .faq-arrow:focus-visible::after {
    transform: none;
  }
}