/* ============ 常见问题页 · page-faq ============ */

.page-faq {
  --faq-rail-w: 236px;
  --faq-indent: clamp(14px, 1.6vw, 20px);
  background:
    radial-gradient(1100px 520px at 88% -10%, rgba(16, 31, 68, 0.9), rgba(7, 20, 39, 0) 68%),
    radial-gradient(760px 420px at -6% 24%, rgba(14, 59, 58, 0.45), rgba(7, 20, 39, 0) 70%),
    var(--ink-900);
  color: var(--bone);
  font-family: var(--font-sans);
  padding-bottom: clamp(56px, 8vw, 112px);
  overflow-wrap: break-word;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 22px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--slate);
}
.page-faq .breadcrumbs a {
  color: var(--slate);
  text-decoration: none;
  transition: color 0.12s ease;
}
.page-faq .breadcrumbs a:hover {
  color: var(--flame);
}
.page-faq .breadcrumbs [aria-current="page"] {
  color: var(--bone-soft);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(26px, 3.6vw, 46px) 0 clamp(30px, 4.4vw, 58px);
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 108px;
  height: 1px;
  background: var(--copper);
}
.page-faq .faq-hero .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--copper);
}
.page-faq .faq-hero h1 {
  margin: 16px 0 0;
  max-width: 22ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(29px, 4.5vw, 52px);
  line-height: 1.14;
  letter-spacing: -0.022em;
  color: var(--bone);
}
.page-faq .faq-hero .lede {
  margin: 20px 0 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.1vw, 17px);
  line-height: 1.85;
  color: var(--bone-soft);
}
.page-faq .faq-hero__meta {
  margin: 24px 0 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--slate);
}

/* ---------- 布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  grid-template-areas:
    "rail"
    "main";
  gap: 26px;
  padding-top: clamp(28px, 4vw, 48px);
}

/* ---------- 快速定位 ---------- */
.page-faq .faq-rail {
  grid-area: rail;
  min-width: 0;
}
.page-faq .faq-rail__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--slate);
}
.page-faq .faq-rail__list {
  list-style: none;
  margin: 10px 0 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.page-faq .faq-rail__list li {
  flex: 0 0 auto;
}
.page-faq .faq-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 13px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--bone-soft);
  text-decoration: none;
  font-size: 13.5px;
  white-space: nowrap;
  transition: border-color 0.12s ease, color 0.12s ease, transform 0.12s ease;
}
.page-faq .faq-rail__link:hover {
  border-color: var(--flame);
  color: var(--bone);
  transform: translateY(-2px);
}
.page-faq .faq-rail__link:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}
.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--copper);
}
.page-faq .faq-rail__hint {
  margin: 10px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 双栏错位 ---------- */
.page-faq .faq-cols {
  grid-area: main;
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(38px, 5vw, 64px);
  min-width: 0;
}
.page-faq .faq-col {
  display: flex;
  flex-direction: column;
  gap: clamp(36px, 4.6vw, 68px);
  min-width: 0;
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  min-width: 0;
  scroll-margin-top: calc(var(--header-h) + 26px);
}
.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 11px;
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-group__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--copper);
}
.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(19px, 1.6vw, 25px);
  line-height: 1.3;
  letter-spacing: -0.012em;
  color: var(--bone);
}
.page-faq .faq-group__lead {
  margin: 14px 0 18px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--slate);
}

/* 导出分组：深青玉底色分区 */
.page-faq .faq-group--export {
  padding: 22px 18px 14px;
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(14, 59, 58, 0.52), rgba(14, 59, 58, 0.08) 78%),
    transparent;
  border-left: 1px solid rgba(57, 255, 136, 0.22);
}

/* 咨询分组：暗酒红底色分区 */
.page-faq .faq-group--contact {
  padding: 22px 18px 14px;
  border-radius: var(--radius);
  background:
    linear-gradient(160deg, rgba(74, 18, 48, 0.6), rgba(7, 20, 39, 0.15) 82%),
    transparent;
  border-left: 1px solid rgba(201, 160, 90, 0.44);
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 22px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-800);
  box-shadow: var(--shadow-float);
}
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 12 / 7;
  filter: saturate(1.05);
}
.page-faq .faq-figure__cap {
  display: block;
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  background: rgba(16, 31, 68, 0.62);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.07em;
  color: var(--slate);
}

/* ---------- 问句条目 ---------- */
.page-faq .qa {
  display: block;
  border-left: 2px solid var(--line-strong);
  border-bottom: 1px solid var(--line);
  padding-left: var(--faq-indent);
  transition: border-color 0.18s ease, background-color 0.18s ease;
}
.page-faq .qa:hover {
  border-left-color: var(--flame);
}
.page-faq .qa[open] {
  border-left-color: var(--neon);
  background: linear-gradient(90deg, rgba(57, 255, 136, 0.055), rgba(57, 255, 136, 0) 46%);
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 4px 15px 0;
  cursor: pointer;
  list-style: none;
  transition: color 0.12s ease;
}
.page-faq .qa__q::-webkit-details-marker {
  display: none;
}
.page-faq .qa__q::marker {
  content: "";
}
.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}

.page-faq .qa__text {
  flex: 1 1 auto;
  min-width: 0;
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(15px, 1.15vw, 16.5px);
  line-height: 1.65;
  letter-spacing: -0.006em;
  color: var(--bone);
}

.page-faq .qa__sign {
  flex: 0 0 auto;
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 6px;
}
.page-faq .qa__sign::before,
.page-faq .qa__sign::after {
  content: "";
  position: absolute;
  background: var(--slate);
  transition: transform 0.2s ease, background-color 0.2s ease;
}
.page-faq .qa__sign::before {
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
  transform: translateY(-50%);
}
.page-faq .qa__sign::after {
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
  transform: translateX(-50%);
}
.page-faq .qa__q:hover .qa__sign::before {
  background: var(--flame);
}
.page-faq .qa[open] .qa__sign::before {
  background: var(--neon);
}
.page-faq .qa[open] .qa__sign::after {
  transform: translateX(-50%) scaleY(0);
}

.page-faq .qa__a {
  padding: 0 8px 20px 0;
}
.page-faq .qa__a p {
  margin: 0;
  max-width: 44ch;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--bone-soft);
}
.page-faq .qa__a p + p {
  margin-top: 10px;
}
.page-faq .qa__a a {
  color: var(--flame);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color 0.12s ease;
}
.page-faq .qa__a a:hover {
  color: var(--neon);
}
.page-faq .qa__a a:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}

/* ---------- 平板 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-cols {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    column-gap: clamp(40px, 4vw, 64px);
  }
  .page-faq .faq-cols::before {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 1px;
    background: linear-gradient(
      180deg,
      rgba(201, 160, 90, 0),
      var(--line-strong) 10%,
      var(--line-strong) 90%,
      rgba(201, 160, 90, 0)
    );
    pointer-events: none;
  }
  .page-faq .faq-col--b {
    margin-top: 88px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1080px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 1fr) var(--faq-rail-w);
    grid-template-areas: "main rail";
    column-gap: clamp(36px, 4vw, 72px);
    align-items: start;
  }
  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 30px);
    padding-left: 20px;
    border-left: 1px solid var(--line);
  }
  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }
  .page-faq .faq-rail__list li {
    flex: 1 1 auto;
  }
  .page-faq .faq-rail__link {
    width: 100%;
    padding: 7px 0 7px 14px;
    border: 0;
    border-left: 2px solid var(--line);
    border-radius: 0;
    white-space: normal;
    font-size: 14px;
  }
  .page-faq .faq-rail__link:hover {
    transform: translateX(3px);
    border-left-color: var(--flame);
  }
  .page-faq .faq-rail__hint {
    padding-left: 14px;
  }
}

/* ---------- 大屏微调 ---------- */
@media (min-width: 1400px) {
  .page-faq .faq-hero h1 {
    max-width: 20ch;
  }
  .page-faq .qa__a p {
    max-width: 46ch;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-rail__link,
  .page-faq .qa,
  .page-faq .qa__sign::before,
  .page-faq .qa__sign::after,
  .page-faq .breadcrumbs a,
  .page-faq .qa__a a {
    transition: none;
  }
  .page-faq .faq-rail__link:hover {
    transform: none;
  }
}