/* ==========================================================
   常见问答 /common questions — 页面作用域：.page-faq
   ========================================================== */

.page-faq {
  position: relative;
}

.page-faq :where(h1, h2, p, figure, ol) {
  margin-block: 0;
}

/* ---------- 首屏：非对称门户构图 ---------- */
.page-faq .faq-top {
  position: relative;
  overflow: hidden;
  padding-block: clamp(2rem, 5.5vw, 4rem) clamp(2.4rem, 6vw, 4.75rem);
  background:
    radial-gradient(85% 68% at 94% 2%, rgba(255, 107, 74, 0.17), transparent 62%),
    radial-gradient(72% 62% at 2% 98%, rgba(47, 123, 163, 0.22), transparent 60%);
}

.page-faq .faq-top__inner {
  display: grid;
  gap: clamp(1.9rem, 5vw, 3.5rem);
  align-items: center;
}

.page-faq .faq-top__text {
  display: grid;
  gap: clamp(0.85rem, 2vw, 1.15rem);
  align-content: start;
}

.page-faq .faq-top__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.35rem;
}

.page-faq .faq-top__media {
  overflow: hidden;
  aspect-ratio: 4 / 5;
}

.page-faq .faq-top__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--notch)), calc(100% - var(--notch)) 100%, 0 100%);
}

/* ---------- 索引 + 问答主体 ---------- */
.page-faq .faq-body {
  padding-block: clamp(2rem, 5vw, 3.5rem) clamp(2.5rem, 6vw, 4.5rem);
}

.page-faq .faq-layout {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: start;
}

.page-faq .faq-index {
  padding: 1.15rem 1.2rem 1rem;
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(11, 39, 64, 0.74), rgba(7, 28, 45, 0.4));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--notch)), calc(100% - var(--notch)) 100%, 0 100%);
}

.page-faq .faq-index__list {
  list-style: none;
  margin-top: 0.85rem;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(8.5rem, 1fr));
  gap: 0.1rem;
}

.page-faq .faq-index__list a {
  display: flex;
  align-items: baseline;
  gap: 0.65rem;
  padding: 0.6rem 0.55rem;
  color: var(--pearl-dim);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--pearl);
  border-left-color: var(--coral);
  background: rgba(255, 107, 74, 0.08);
}

.page-faq .faq-index__list a .metric {
  color: var(--coral);
  letter-spacing: 0.08em;
}

/* ---------- 问题分组 ---------- */
.page-faq .faq-groups {
  display: grid;
  gap: clamp(2.25rem, 5vw, 3.75rem);
}

.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h, 4rem) + 1.5rem);
}

.page-faq .faq-group__head {
  display: grid;
  gap: 0.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line-strong);
}

.page-faq .faq-group__head .metric {
  color: var(--coral);
  letter-spacing: 0.14em;
  font-size: 0.8rem;
}

.page-faq .faq-group__lede {
  max-width: 58ch;
  color: var(--pearl-dim);
  line-height: 1.75;
}

.page-faq .faq-list {
  border-top: 1px solid var(--line);
  margin-top: 0.25rem;
}

/* ---------- 单条问答 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.25rem;
  padding: clamp(0.95rem, 2.2vw, 1.3rem) 0;
  cursor: pointer;
  list-style: none;
  color: var(--pearl);
  font-weight: 600;
  line-height: 1.55;
  transition: color 0.2s ease;
}

.page-faq .faq-item > summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item > summary::marker {
  content: "";
}

.page-faq .faq-item > summary:hover {
  color: var(--coral-soft);
}

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 4px;
}

.page-faq .faq-item__q {
  font-size: clamp(1rem, 0.55vw + 0.88rem, 1.16rem);
  letter-spacing: 0.01em;
}

.page-faq .faq-item__mark {
  position: relative;
  flex: 0 0 auto;
  width: 1.6rem;
  height: 1.6rem;
  margin-top: 0.1rem;
  border: 1px solid var(--line-strong);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 7px), calc(100% - 7px) 100%, 0 100%);
  transition: border-color 0.25s ease, background-color 0.25s ease;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--coral);
  transform: translate(-50%, -50%);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.page-faq .faq-item__mark::before {
  width: 0.7rem;
  height: 1.5px;
}

.page-faq .faq-item__mark::after {
  width: 1.5px;
  height: 0.7rem;
}

.page-faq .faq-item[open] > summary .faq-item__mark {
  border-color: var(--edge);
  background: rgba(255, 107, 74, 0.14);
}

.page-faq .faq-item[open] > summary .faq-item__mark::after {
  transform: translate(-50%, -50%) scaleY(0);
  opacity: 0;
}

.page-faq .faq-item__body {
  max-width: 68ch;
  padding-bottom: clamp(1rem, 2.4vw, 1.5rem);
  color: var(--pearl-dim);
  line-height: 1.85;
}

.page-faq .faq-item[open] > .faq-item__body {
  animation: faq-open 0.28s ease both;
}

@keyframes faq-open {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item[open] > .faq-item__body {
    animation: none;
  }
}

/* ---------- 分组内嵌视觉 ---------- */
.page-faq .faq-figure {
  margin-top: clamp(1.5rem, 3.2vw, 2.25rem);
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--notch)), calc(100% - var(--notch)) 100%, 0 100%);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 5;
  object-fit: cover;
}

/* ---------- 收尾联系面板 ---------- */
.page-faq .faq-cta {
  padding-block: clamp(1rem, 3vw, 2rem) clamp(3rem, 7vw, 5.5rem);
}

.page-faq .faq-cta__panel {
  display: grid;
  gap: 0.95rem;
  align-content: start;
  padding: clamp(1.5rem, 4vw, 2.75rem);
  background:
    radial-gradient(70% 90% at 96% 0%, rgba(255, 107, 74, 0.16), transparent 68%),
    linear-gradient(160deg, var(--sea-700), var(--sea-800));
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.35rem;
}

/* ---------- 断点 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-top__inner {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: clamp(2.5rem, 6vw, 5rem);
  }

  .page-faq .faq-top__media {
    max-height: 30rem;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: 15rem minmax(0, 1fr);
    gap: clamp(2.5rem, 5vw, 4.5rem);
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h, 4rem) + 1.5rem);
  }

  .page-faq .faq-index__list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .page-faq .faq-item > summary {
    gap: 0.9rem;
  }

  .page-faq .faq-figure img {
    aspect-ratio: 4 / 3;
  }
}