/* ===== 问题解答页 · page-faq ===== */
.page-faq {
  --faq-index-w: 264px;
  --faq-sticky: 96px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(28px, 6vw, 60px) 0 clamp(26px, 4vw, 44px);
  border-top: 1px solid var(--line);
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: -1px;
  height: 2px;
  background: linear-gradient(90deg, var(--violet) 0%, var(--cyan) 48%, rgba(0, 229, 255, 0) 88%);
}
.page-faq .faq-hero .ph-title {
  max-width: 22ch;
  color: var(--mist);
}
.page-faq .faq-hero .ph-lede {
  max-width: 64ch;
  margin-top: 14px;
  color: var(--gray);
}

.page-faq .faq-hero__meta {
  list-style: none;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.page-faq .faq-hero__meta > li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
  padding: 14px 16px 16px;
  background: var(--ink);
}
.page-faq .faq-hero__meta-k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  line-height: 1.5;
  color: var(--gray);
}
.page-faq .faq-hero__meta-v {
  font-family: var(--font-display);
  font-size: clamp(20px, 2.4vw, 27px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--mist);
}
.page-faq .faq-hero__meta-v--cyan {
  color: var(--cyan);
}

/* ---------- 两栏骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  padding: clamp(30px, 5vw, 56px) 0 clamp(40px, 6vw, 72px);
  border-top: 1px solid var(--line);
}

/* ---------- 左侧常驻索引 ---------- */
.page-faq .faq-index {
  min-width: 0;
}
.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--violet-soft);
}
.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(212px, 78%);
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}
.page-faq .faq-index__item {
  min-width: 0;
}
.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 13px 14px;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-left: 2px solid var(--line);
  border-radius: var(--radius);
  color: var(--mist);
  text-decoration: none;
  transition: border-color 160ms var(--ease), background 160ms var(--ease), transform 160ms var(--ease);
}
.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-color: rgba(0, 229, 255, 0.45);
  border-left-color: var(--cyan);
  background: rgba(0, 229, 255, 0.07);
}
.page-faq .faq-index__link:active {
  transform: translateY(1px);
}
.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--violet-soft);
}
.page-faq .faq-index__label {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -0.005em;
}
.page-faq .faq-index__count {
  min-width: 28px;
  padding: 2px 6px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 11px;
  text-align: center;
  color: var(--gray);
}
.page-faq .faq-index__foot {
  margin: 16px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--gray);
}

/* ---------- 右栏正文 ---------- */
.page-faq .faq-body {
  min-width: 0;
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 34px;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.page-faq .faq-figure--inset {
  margin: 30px 0 0;
}
.page-faq .faq-figure__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(0.88) contrast(1.05);
}
.page-faq .faq-figure__cap {
  padding: 11px 16px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  line-height: 1.6;
  color: var(--gray);
}

/* ---------- 分组标题 ---------- */
.page-faq .faq-group {
  scroll-margin-top: var(--faq-sticky);
}
.page-faq .faq-group + .faq-group {
  margin-top: clamp(44px, 6vw, 72px);
}
.page-faq .faq-group__head {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: end;
  gap: 4px 14px;
  padding-bottom: 14px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-group__head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 68px;
  height: 2px;
  background: var(--violet);
}
.page-faq .faq-group__num {
  font-family: var(--font-display);
  font-size: clamp(30px, 4vw, 42px);
  font-weight: 700;
  line-height: 0.85;
  letter-spacing: -0.02em;
  color: var(--violet);
}
.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(1.2rem, 2vw, 1.55rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--mist);
}
.page-faq .faq-group__desc {
  grid-column: 1 / -1;
  margin: 8px 0 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.72;
  color: var(--gray);
}

/* ---------- 折叠条目 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 8px;
}
.page-faq .faq-item {
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-left: 2px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 180ms var(--ease);
}
.page-faq .faq-item:hover {
  border-left-color: var(--violet-soft);
}
.page-faq .faq-item[open] {
  border-color: rgba(0, 229, 255, 0.28);
  border-left-color: var(--cyan);
}
.page-faq .faq-item[open]:hover {
  border-left-color: var(--cyan);
}
.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  transition: background 160ms var(--ease);
}
.page-faq .faq-item__q::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item__q::marker {
  content: "";
}
.page-faq .faq-item__q:hover {
  background: rgba(108, 43, 217, 0.14);
}
.page-faq .faq-item__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  line-height: 1.8;
  color: var(--violet-soft);
}
.page-faq .faq-item__text {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  letter-spacing: -0.005em;
  color: var(--mist);
}
.page-faq .faq-item__marker {
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 7px;
}
.page-faq .faq-item__marker::before,
.page-faq .faq-item__marker::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform 200ms var(--ease), opacity 200ms var(--ease);
}
.page-faq .faq-item__marker::before {
  left: 0;
  top: 6.25px;
  width: 14px;
  height: 1.5px;
}
.page-faq .faq-item__marker::after {
  left: 6.25px;
  top: 0;
  width: 1.5px;
  height: 14px;
}
.page-faq .faq-item[open] .faq-item__marker::after {
  transform: scaleY(0);
  opacity: 0;
}

/* ---------- 奶油底答案 ---------- */
.page-faq .faq-item__a {
  margin: 0 10px 10px;
  padding: 17px 18px 20px;
  background: var(--cream);
  border-radius: var(--radius);
  color: var(--brown);
  font-size: 15.5px;
  line-height: 1.78;
}
.page-faq .faq-item__a p {
  margin: 0 0 11px;
}
.page-faq .faq-item__a p:last-child {
  margin-bottom: 0;
}
.page-faq .faq-item__a .ph-link-inline {
  color: var(--violet);
}
.page-faq .faq-item__tail {
  margin-top: 12px;
}
.page-faq .faq-hint {
  display: block;
  margin-top: 12px;
  padding: 10px 12px;
  background: rgba(108, 43, 217, 0.1);
  border-left: 2px solid var(--violet);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.03em;
  line-height: 1.7;
  color: var(--cream-muted);
}

/* ---------- 等宽步骤 ---------- */
.page-faq .faq-steps {
  counter-reset: faqstep;
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 9px;
}
.page-faq .faq-steps__item {
  counter-increment: faqstep;
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.03em;
  line-height: 1.7;
  color: var(--cream-muted);
}
.page-faq .faq-steps__item::before {
  content: counter(faqstep, decimal-leading-zero);
  font-weight: 700;
  color: var(--violet);
}
.page-faq .faq-steps--dark .faq-steps__item {
  color: var(--mist);
}
.page-faq .faq-steps--dark .faq-steps__item::before {
  color: var(--cyan);
}

/* ---------- 反馈与联系 ---------- */
.page-faq .faq-contact {
  padding: clamp(34px, 5vw, 60px) 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: var(--faq-sticky);
}
.page-faq .faq-contact .ph-subtitle {
  margin: 8px 0 0;
  color: var(--mist);
}
.page-faq .faq-contact__lede {
  margin: 12px 0 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.76;
  color: var(--gray);
}
.page-faq .faq-contact__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  margin-top: 28px;
}
.page-faq .faq-contact__panel {
  min-width: 0;
}
.page-faq .faq-contact__aside {
  display: grid;
  gap: 16px;
  min-width: 0;
}
.page-faq .faq-contact__addr {
  margin: 0;
  padding: 14px 16px;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  line-height: 1.7;
  color: var(--mist);
}
.page-faq .faq-contact__addr span {
  display: block;
  margin-bottom: 5px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--gray);
}

/* ---------- 延伸入口 ---------- */
.page-faq .faq-next {
  padding: clamp(32px, 4.5vw, 52px) 0 clamp(48px, 6vw, 80px);
  border-top: 1px solid var(--line);
}
.page-faq .faq-next__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: 18px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.page-faq .faq-next__card {
  display: grid;
  gap: 6px;
  min-width: 0;
  padding: 20px 18px 22px;
  background: var(--ink);
  color: var(--mist);
  text-decoration: none;
  transition: background 160ms var(--ease);
}
.page-faq .faq-next__card:hover,
.page-faq .faq-next__card:focus-visible {
  background: var(--ink-2);
}
.page-faq .faq-next__label {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.005em;
  transition: color 160ms var(--ease);
}
.page-faq .faq-next__card:hover .faq-next__label {
  color: var(--cyan);
}
.page-faq .faq-next__desc {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--gray);
}

/* ---------- 平板 ---------- */
@media (min-width: 600px) {
  .page-faq .faq-item__text {
    font-size: 17px;
  }
  .page-faq .faq-item__q {
    padding: 17px 20px;
  }
  .page-faq .faq-item__a {
    margin: 0 12px 12px;
    padding: 19px 20px 22px;
  }
  .page-faq .faq-hero__meta {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-faq .faq-next__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 桌面：左索引常驻 ---------- */
@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 60px);
  }
  .page-faq .faq-index {
    position: sticky;
    top: var(--faq-sticky);
    align-self: start;
  }
  .page-faq .faq-index__list {
    grid-auto-flow: row;
    grid-auto-columns: auto;
    gap: 3px;
    overflow: visible;
    padding-bottom: 0;
  }
  .page-faq .faq-group__head {
    grid-template-columns: auto minmax(0, 1fr);
  }
  .page-faq .faq-contact__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: 28px;
    align-items: start;
  }
  .page-faq .faq-next__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__link,
  .page-faq .faq-item,
  .page-faq .faq-item__q,
  .page-faq .faq-item__marker::before,
  .page-faq .faq-item__marker::after,
  .page-faq .faq-next__card,
  .page-faq .faq-next__label {
    transition: none;
  }
}