/* ===== 页面作用域：常见问答 ===== */
.page-faq {
  --faq-cyan: var(--yb-cyan);
  --faq-orange: var(--yb-orange);
  --faq-yellow: var(--yb-yellow);
  --faq-rail-top: calc(var(--yb-header-h) + 28px);
}

.page-faq .yb-section--paper,
.page-faq .yb-section--mist {
  --faq-cyan: #0B8477;
  --faq-orange: #C93F16;
  --faq-yellow: #A97600;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-top: calc(var(--yb-header-h) + clamp(40px, 7vw, 104px));
  padding-bottom: clamp(52px, 8vw, 96px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: calc(var(--yb-header-h) + 4px);
  right: -140px;
  width: 400px;
  height: 400px;
  border: 1px solid rgba(22, 224, 200, 0.22);
  border-radius: 50%;
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--yb-cyan), var(--yb-orange) 58%, var(--yb-yellow));
}

.page-faq .faq-hero .yb-breadcrumb {
  margin: 0 0 clamp(24px, 4vw, 42px);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 4vw, 52px);
}

.page-faq .faq-hero__lead .yb-h1 {
  margin: 14px 0 0;
  max-width: 17ch;
}

.page-faq .faq-hero__lead .yb-lede {
  margin-top: clamp(20px, 3vw, 30px);
  max-width: 58ch;
}

.page-faq .faq-hero__side {
  border-left: 3px solid var(--faq-cyan);
  padding-left: 18px;
}

.page-faq .faq-hero__side p {
  margin: 0;
  max-width: 34ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--yb-muted);
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
    gap: clamp(40px, 5vw, 84px);
  }
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-body {
  padding-top: clamp(44px, 6.5vw, 84px);
  padding-bottom: clamp(56px, 8vw, 104px);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(36px, 5vw, 56px);
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 7.4fr) minmax(0, 2.6fr);
    gap: clamp(44px, 5vw, 80px);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: var(--faq-rail-top);
  }
}

/* ---------- 分类锚点 ---------- */
.page-faq .faq-rail__label {
  margin: 0 0 12px;
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--yb-fg);
}

.page-faq .faq-rail__item {
  border-bottom: 1px solid var(--yb-line);
}

.page-faq .faq-rail__link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 15px 2px;
  color: var(--yb-fg);
  font-size: 15px;
  line-height: 1.4;
  text-decoration: none;
  transition: color 200ms var(--yb-ease), padding-left 200ms var(--yb-ease);
}

.page-faq .faq-rail__link .yb-num {
  font-size: 12px;
  color: var(--yb-muted);
  transition: color 200ms var(--yb-ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--faq-orange);
  padding-left: 10px;
}

.page-faq .faq-rail__link:hover .yb-num,
.page-faq .faq-rail__link:focus-visible .yb-num {
  color: var(--faq-orange);
}

.page-faq .faq-rail__link:focus-visible {
  outline: 3px solid var(--faq-cyan);
  outline-offset: 2px;
}

.page-faq .faq-rail__help {
  margin-top: 28px;
  padding: 18px;
  border: 1px solid var(--yb-line);
  background: rgba(22, 224, 200, 0.08);
}

.page-faq .faq-rail__help p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--yb-muted);
}

.page-faq .faq-rail__help a {
  color: var(--faq-cyan);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 2px solid var(--faq-cyan);
  transition: color 200ms var(--yb-ease), border-color 200ms var(--yb-ease);
}

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

.page-faq .faq-rail__help a:focus-visible {
  outline: 3px solid var(--faq-cyan);
  outline-offset: 3px;
}

/* ---------- 分组标题 ---------- */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--yb-header-h) + 24px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(52px, 7vw, 92px);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 16px;
  padding-bottom: 16px;
  border-bottom: 3px solid var(--yb-fg);
}

.page-faq .faq-group__no {
  grid-row: 1 / span 2;
  font-size: clamp(30px, 4.4vw, 46px);
  line-height: 0.9;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--faq-orange);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(20px, 2.6vw, 30px);
  line-height: 1.25;
}

.page-faq .faq-group__desc {
  margin: 8px 0 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--yb-muted);
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-list {
  margin: 0;
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--yb-line);
  border-left: 4px solid transparent;
  transition: border-left-color 200ms var(--yb-ease), background-color 200ms var(--yb-ease);
}

.page-faq .faq-item[open] {
  border-left-color: var(--faq-cyan);
  background: rgba(22, 224, 200, 0.07);
}

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: 3ch minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 14px;
  padding: 18px 18px 18px 20px;
  cursor: pointer;
  list-style: none;
  font-size: clamp(15.5px, 1.5vw, 18px);
  font-weight: 600;
  line-height: 1.5;
  color: var(--yb-fg);
  transition: color 200ms var(--yb-ease);
}

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

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

.page-faq .faq-item__q:hover {
  color: var(--faq-orange);
}

.page-faq .faq-item__q:focus-visible {
  outline: 3px solid var(--faq-cyan);
  outline-offset: -3px;
}

.page-faq .faq-item__no {
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--yb-muted);
  transition: color 200ms var(--yb-ease);
}

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

.page-faq .faq-item__sign {
  position: relative;
  align-self: center;
  width: 14px;
  height: 14px;
  color: var(--yb-muted);
  transition: color 200ms var(--yb-ease);
}

.page-faq .faq-item__sign::before,
.page-faq .faq-item__sign::after {
  content: "";
  position: absolute;
  background: currentColor;
}

.page-faq .faq-item__sign::before {
  left: 0;
  right: 0;
  top: 6px;
  height: 2px;
}

.page-faq .faq-item__sign::after {
  top: 0;
  bottom: 0;
  left: 6px;
  width: 2px;
  transition: transform 220ms var(--yb-ease);
}

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

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

.page-faq .faq-item__a {
  padding: 0 22px 24px clamp(32px, 5vw, 52px);
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 64ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--yb-muted);
}

.page-faq .yb-section--paper .faq-item__a p,
.page-faq .yb-section--mist .faq-item__a p {
  color: var(--yb-graphite);
}

.page-faq .faq-item__a a {
  color: var(--faq-orange);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  transition: color 200ms var(--yb-ease);
}

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

/* ---------- 收藏页步骤图 ---------- */
.page-faq .faq-figure {
  margin: clamp(28px, 4vw, 42px) 0 0;
}

.page-faq .faq-figure .yb-figure__caption {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--yb-muted);
}

@media (min-width: 640px) {
  .page-faq .faq-figure--narrow {
    max-width: 360px;
  }
}

/* ---------- 行程折线 ---------- */
.page-faq .faq-track {
  display: grid;
  gap: 18px;
  margin-top: clamp(26px, 3.5vw, 40px);
  padding: 20px;
  border: 1px solid var(--yb-line);
  background: var(--yb-surface);
  color: var(--yb-muted);
}

.page-faq .faq-track__svg {
  display: block;
  width: 100%;
  height: auto;
  max-height: 140px;
}

.page-faq .faq-track__legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  font-size: 13.5px;
  line-height: 1.5;
}

.page-faq .faq-track__legend li {
  display: grid;
  grid-template-columns: 10px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
}

.page-faq .faq-track__dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
}

.page-faq .faq-track__dot--cyan {
  background: var(--faq-cyan);
}

.page-faq .faq-track__dot--orange {
  background: var(--faq-orange);
}

.page-faq .faq-track__dot--yellow {
  background: var(--faq-yellow);
}

@media (min-width: 760px) {
  .page-faq .faq-track {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: center;
    gap: 28px;
    padding: 26px 28px;
  }
}

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

.page-faq .faq-cta__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.5vw, 40px);
}

.page-faq .faq-cta__copy .yb-h2 {
  margin: 12px 0 0;
}

.page-faq .faq-cta__copy .yb-lede {
  margin-top: 16px;
  max-width: 52ch;
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

@media (min-width: 900px) {
  .page-faq .faq-cta__inner {
    grid-template-columns: minmax(0, 6.5fr) minmax(0, 4.5fr);
    align-items: end;
    gap: clamp(36px, 5vw, 72px);
  }

  .page-faq .faq-cta__actions {
    justify-content: flex-end;
  }
}

/* ---------- 无障碍与降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item__q,
  .page-faq .faq-item__no,
  .page-faq .faq-item__sign,
  .page-faq .faq-item__sign::after,
  .page-faq .faq-rail__link,
  .page-faq .faq-rail__link .yb-num,
  .page-faq .faq-rail__help a,
  .page-faq .faq-item__a a {
    transition: none;
  }
}

@media (max-width: 480px) {
  .page-faq .faq-item__q {
    grid-template-columns: 2.4ch minmax(0, 1fr) auto;
    gap: 10px;
    padding: 16px 14px 16px 16px;
  }

  .page-faq .faq-item__a {
    padding: 0 16px 20px clamp(26px, 8vw, 34px);
  }

  .page-faq .faq-group__head {
    column-gap: 12px;
  }
}
</main>