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

.page-faq .yb-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 20px 0 2px;
  font-size: 13px;
  color: var(--yb-muted);
}

.page-faq .yb-crumbs a {
  color: var(--yb-muted);
  text-decoration: none;
  transition: color 0.2s var(--yb-ease);
}

.page-faq .yb-crumbs a:hover {
  color: var(--yb-cyan);
}

.page-faq .yb-crumbs span[aria-hidden] {
  color: var(--yb-line);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: 26px 0 44px;
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -24%;
  right: -12%;
  width: 78vw;
  height: 78vw;
  max-width: 640px;
  max-height: 640px;
  background: radial-gradient(circle at 62% 36%, rgba(56, 242, 196, 0.16), rgba(43, 31, 77, 0.36) 46%, transparent 72%);
  pointer-events: none;
  z-index: 0;
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  align-items: center;
}

.page-faq .faq-hero .yb-eyebrow {
  display: block;
  margin: 0 0 12px;
}

.page-faq .faq-hero h1 {
  margin: 0 0 16px;
  font-size: clamp(30px, 6.2vw, 56px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--yb-text);
}

.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 54ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--yb-muted);
}

.page-faq .faq-hero__media {
  margin: 0;
  border: var(--faq-rule);
  border-radius: var(--yb-radius);
  overflow: hidden;
  background: var(--yb-panel);
}

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

/* ---------- 主体两栏 ---------- */

.page-faq .faq-board {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
  padding-bottom: 72px;
}

.page-faq .faq-board__aside,
.page-faq .faq-board__main {
  min-width: 0;
}

.page-faq .faq-board__aside .yb-eyebrow {
  display: block;
  margin: 0 0 12px;
}

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

.page-faq .faq-index a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 14px;
  border: var(--faq-rule);
  border-radius: 999px;
  text-decoration: none;
  font-size: 14px;
  color: var(--yb-text);
  transition: color 0.2s var(--yb-ease), border-color 0.2s var(--yb-ease), background-color 0.2s var(--yb-ease);
}

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

.page-faq .faq-index__num {
  font-family: var(--yb-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--yb-muted);
}

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

.page-faq .faq-board__figure {
  margin: 24px 0 0;
  border: var(--faq-rule);
  border-radius: 12px;
  overflow: hidden;
  background: var(--yb-panel);
}

.page-faq .faq-board__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

/* ---------- 问答分组 ---------- */

.page-faq .faq-block {
  padding: 34px 0;
  border-top: var(--faq-rule);
  scroll-margin-top: 24px;
}

.page-faq .faq-block:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-faq .faq-block__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  margin-bottom: 20px;
}

.page-faq .faq-block__num {
  padding-top: 7px;
  border-top: 2px solid var(--yb-cyan);
  font-family: var(--yb-mono);
  font-size: 13px;
  line-height: 1;
  letter-spacing: 0.08em;
  color: var(--yb-cyan);
}

.page-faq .faq-block__title {
  margin: 0 0 6px;
  font-size: clamp(20px, 2.6vw, 27px);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--yb-text);
}

.page-faq .faq-block__sub {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--yb-muted);
}

/* ---------- 折叠条目 ---------- */

.page-faq .faq-item {
  position: relative;
  margin: 0 0 10px;
  border: var(--faq-rule);
  border-left: 3px solid var(--yb-line);
  border-radius: 12px;
  background: var(--yb-panel);
  overflow: hidden;
  transition: border-color 0.24s var(--yb-ease), background-color 0.24s var(--yb-ease), box-shadow 0.24s var(--yb-ease);
}

.page-faq .faq-item:hover {
  border-left-color: rgba(56, 242, 196, 0.55);
}

.page-faq .faq-item[open] {
  border-left-color: var(--yb-cyan);
  background: linear-gradient(90deg, rgba(56, 242, 196, 0.07), transparent 46%), var(--yb-panel);
  box-shadow: 0 0 0 1px rgba(56, 242, 196, 0.12);
}

.page-faq .faq-item__q {
  position: relative;
  list-style: none;
  cursor: pointer;
  padding: 16px 52px 16px 18px;
  font-size: 17px;
  font-weight: 500;
  line-height: 1.55;
  color: var(--yb-text);
  transition: color 0.2s var(--yb-ease);
}

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

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--yb-cyan);
  outline-offset: -3px;
  border-radius: 10px;
}

.page-faq .faq-item__q::before,
.page-faq .faq-item__q::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 20px;
  width: 13px;
  height: 1.5px;
  border-radius: 2px;
  background: var(--yb-muted);
  transition: transform 0.24s var(--yb-ease), opacity 0.2s var(--yb-ease), background-color 0.2s var(--yb-ease);
}

.page-faq .faq-item__q::after {
  transform: translateY(-50%);
}

.page-faq .faq-item__q::before {
  transform: translateY(-50%) rotate(90deg);
}

.page-faq .faq-item[open] .faq-item__q::before {
  opacity: 0;
  transform: translateY(-50%) rotate(0deg);
}

.page-faq .faq-item[open] .faq-item__q::after {
  background: var(--yb-cyan);
}

.page-faq .faq-item__a {
  padding: 0 20px 18px 18px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--yb-muted);
}

.page-faq .faq-item__a p {
  margin: 0 0 10px;
}

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

.page-faq .faq-item__a a {
  color: var(--yb-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 242, 196, 0.35);
  transition: border-color 0.2s var(--yb-ease);
}

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

.page-faq .faq-tip {
  margin-top: 12px;
  padding: 10px 14px;
  border-left: 3px solid var(--yb-orange);
  border-radius: 0 8px 8px 0;
  background: rgba(255, 107, 44, 0.08);
  font-size: 14px;
  line-height: 1.68;
  color: var(--yb-text);
}

/* ---------- 桌面端布局 ---------- */

@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: 34px 0 54px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 44px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-board {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    gap: 52px;
    align-items: start;
  }

  .page-faq .faq-index ol {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
  }

  .page-faq .faq-index a {
    width: 100%;
    align-items: baseline;
    padding: 11px 8px 11px 14px;
    border: 0;
    border-left: 3px solid var(--yb-line);
    border-radius: 0;
    font-size: 15px;
  }

  .page-faq .faq-index a:hover,
  .page-faq .faq-index a:focus-visible,
  .page-faq .faq-index a.is-active {
    border-left-color: var(--yb-cyan);
    background: var(--yb-glass);
    color: var(--yb-cyan);
  }

  .page-faq .faq-index a:hover .faq-index__num,
  .page-faq .faq-index a.is-active .faq-index__num {
    color: var(--yb-cyan);
  }

  .page-faq .faq-board__figure {
    margin-top: 30px;
  }

  .page-faq .faq-block {
    padding: 40px 0;
  }

  .page-faq .faq-item__q {
    font-size: 17px;
    padding: 17px 56px 17px 20px;
  }

  .page-faq .faq-item__a {
    padding: 0 24px 20px 20px;
    max-width: 72ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item__q::before,
  .page-faq .faq-item__q::after,
  .page-faq .faq-index a {
    transition: none;
  }
}