/* ===== 问答中心 · page-faq ===== */
.page-faq {
  position: relative;
  background-color: var(--ink);
  background-image:
    linear-gradient(to right, rgba(36, 64, 107, .3) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(36, 64, 107, .3) 1px, transparent 1px);
  background-size: 72px 72px;
  color: var(--cream);
  padding-bottom: clamp(56px, 8vw, 104px);
  overflow-x: hidden;
}

/* --- 面包屑 --- */
.page-faq .breadcrumb {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(20px, 3vw, 34px) var(--gutter) 0;
}
.page-faq .breadcrumb ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: .82rem;
  letter-spacing: .04em;
  color: var(--muted);
}
.page-faq .breadcrumb li {
  display: flex;
  align-items: center;
  gap: 8px;
}
.page-faq .breadcrumb li + li::before {
  content: "/";
  color: rgba(143, 163, 200, .5);
}
.page-faq .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}
.page-faq .breadcrumb [aria-current="page"] {
  color: var(--cream);
}

/* --- 首屏 --- */
.page-faq .faq-hero {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  padding-block: clamp(26px, 4vw, 48px) clamp(14px, 2vw, 22px);
}
.page-faq .faq-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  font-size: .74rem;
  letter-spacing: .24em;
  color: var(--cyan);
}
.page-faq .faq-hero__eyebrow::before {
  content: "";
  width: 34px;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
}
.page-faq .faq-hero__title {
  margin: 0 0 22px;
  font-size: clamp(2rem, 4.6vw, 3.4rem);
  line-height: 1.05;
  letter-spacing: -.02em;
  font-weight: 900;
  max-width: 18ch;
}
.page-faq .faq-hero__lede {
  margin: 0 0 28px;
  max-width: 56ch;
  font-size: clamp(1rem, 1.15vw, 1.0625rem);
  line-height: 1.85;
  color: rgba(244, 239, 228, .78);
}
.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0 0 28px;
  padding: 0;
  background: var(--steel);
  border: 1px solid var(--steel);
  border-radius: var(--r-md);
  overflow: hidden;
}
.page-faq .faq-stat {
  margin: 0;
  padding: 15px 16px;
  background: var(--ink-2);
}
.page-faq .faq-stat__label {
  display: block;
  font-size: .74rem;
  letter-spacing: .1em;
  color: var(--muted);
}
.page-faq .faq-stat__num {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(1.25rem, 2.2vw, 1.8rem);
  font-variant-numeric: tabular-nums;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cyan);
}
.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-faq .faq-hero__media {
  margin: 0;
  position: relative;
  border: 1px solid var(--steel);
  border-radius: var(--r-lg);
  background: var(--ink-2);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}
.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.page-faq .faq-hero__media .media__caption {
  padding: 10px 16px;
  font-size: .74rem;
  letter-spacing: .04em;
  color: var(--muted);
  border-top: 1px solid rgba(30, 58, 110, .7);
}

/* --- 索引 + 分组两栏 --- */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
  padding-block: clamp(24px, 4vw, 44px);
}
.page-faq .faq-rail {
  border: 1px solid var(--steel);
  border-radius: var(--r-md);
  background: linear-gradient(180deg, rgba(18, 34, 74, .92), rgba(10, 22, 51, .94));
  padding: 18px 16px;
}
.page-faq .faq-rail__title {
  margin: 0 0 14px;
  font-size: .72rem;
  letter-spacing: .22em;
  color: var(--cyan);
}
.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px;
}
.page-faq .faq-rail__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  min-height: 44px;
  padding: 11px 10px;
  border-radius: var(--r-sm);
  border-left: 2px solid transparent;
  color: var(--muted);
  font-size: .9rem;
  line-height: 1.35;
  text-decoration: none;
  transition: color .18s var(--ease), background-color .18s var(--ease), border-color .18s var(--ease);
}
.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--cream);
  background: rgba(53, 240, 208, .08);
  border-left-color: var(--cyan);
}
.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .04em;
  color: var(--cyan);
}
.page-faq .faq-rail__hint {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px dashed rgba(143, 163, 200, .26);
  font-size: .74rem;
  line-height: 1.7;
  color: rgba(143, 163, 200, .82);
}

/* --- 分组卡片 --- */
.page-faq .faq-groups {
  display: grid;
  gap: clamp(18px, 2.4vw, 28px);
  min-width: 0;
}
.page-faq .faq-group {
  position: relative;
  scroll-margin-top: 96px;
  padding: clamp(18px, 2.4vw, 28px);
  border: 1px solid var(--steel);
  border-radius: var(--r-lg);
  background: var(--ink-2);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}
.page-faq .faq-group::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: linear-gradient(180deg, var(--cyan), rgba(53, 240, 208, 0) 68%);
}
.page-faq .faq-group__head {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 18px;
}
.page-faq .faq-group__icon {
  flex: none;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  border: 1px solid rgba(53, 240, 208, .35);
  background: rgba(53, 240, 208, .08);
  color: var(--cyan);
}
.page-faq .faq-group__icon svg {
  width: 22px;
  height: 22px;
}
.page-faq .faq-group__tag {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  color: var(--amber);
}
.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(1.15rem, 2vw, 1.5rem);
  line-height: 1.35;
  letter-spacing: -.01em;
  color: var(--cream);
}

/* --- 分组配图 --- */
.page-faq .faq-group__figure {
  margin: 0 0 18px;
  border: 1px solid rgba(30, 58, 110, .9);
  border-radius: var(--r-md);
  overflow: hidden;
  background: rgba(10, 22, 51, .6);
}
.page-faq .faq-group__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}
.page-faq .faq-figure__caption {
  padding: 10px 14px;
  font-size: .74rem;
  letter-spacing: .04em;
  color: var(--muted);
  border-top: 1px solid rgba(30, 58, 110, .7);
}

/* --- 折叠问答 --- */
.page-faq .accordion {
  display: grid;
  gap: 8px;
}
.page-faq .accordion__item {
  border: 1px solid rgba(30, 58, 110, .95);
  border-radius: var(--r-md);
  background: rgba(10, 22, 51, .55);
  transition: border-color .2s var(--ease), background-color .2s var(--ease);
}
.page-faq .accordion__item[data-open] {
  border-color: rgba(53, 240, 208, .48);
  background: rgba(10, 22, 51, .9);
}
.page-faq .faq-q {
  margin: 0;
  font-size: 1rem;
  font-weight: 500;
}
.page-faq .accordion__trigger {
  width: 100%;
  min-height: 44px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  padding: 15px 16px;
  border: 0;
  background: none;
  color: var(--cream);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.55;
  text-align: left;
  cursor: pointer;
  transition: color .18s var(--ease);
}
.page-faq .accordion__trigger:hover,
.page-faq .accordion__trigger:focus-visible {
  color: var(--cyan);
}
.page-faq .faq-toggle {
  position: relative;
  flex: none;
  width: 18px;
  height: 18px;
}
.page-faq .faq-toggle::before,
.page-faq .faq-toggle::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
  transform: translateY(-50%);
  transition: transform .2s var(--ease), opacity .2s var(--ease);
}
.page-faq .faq-toggle::after {
  transform: translateY(-50%) rotate(90deg);
}
.page-faq .accordion__item[data-open] .faq-toggle::after {
  transform: translateY(-50%) rotate(0deg);
  opacity: 0;
}
.page-faq .accordion__panel {
  overflow: hidden;
}
.page-faq .accordion__body {
  padding: 14px 16px 16px;
  margin: 0 0 0;
  border-top: 1px dashed rgba(143, 163, 200, .28);
  font-size: .96rem;
  line-height: 1.8;
  color: rgba(244, 239, 228, .8);
}
.page-faq .faq-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  color: var(--cyan);
}
.page-faq .faq-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 240, 208, .5);
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.page-faq .faq-link:hover,
.page-faq .faq-link:focus-visible {
  color: var(--cyan-soft);
  border-bottom-color: var(--cyan-soft);
}

/* --- 组内引导条 --- */
.page-faq .faq-more {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  align-items: center;
  justify-content: space-between;
  margin: 14px 0 0;
  padding: 12px 16px;
  border: 1px solid rgba(255, 154, 46, .28);
  border-radius: var(--r-md);
  background: rgba(255, 154, 46, .08);
  font-size: .88rem;
  line-height: 1.65;
  color: rgba(244, 239, 228, .85);
}
.page-faq .faq-more a {
  color: var(--amber);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 154, 46, .5);
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.page-faq .faq-more a:hover,
.page-faq .faq-more a:focus-visible {
  color: #FFC178;
  border-bottom-color: #FFC178;
}

/* --- 尾部联系面板 --- */
.page-faq .faq-tail {
  margin-top: clamp(28px, 4vw, 48px);
}
.page-faq .faq-tail__card {
  display: grid;
  gap: clamp(18px, 2.6vw, 34px);
  padding: clamp(24px, 3.4vw, 44px);
  border: 1px solid var(--paper-line);
  border-radius: var(--r-lg);
  background: var(--cream);
  color: var(--brown);
}
.page-faq .faq-tail__title {
  margin: 0 0 12px;
  font-size: clamp(1.35rem, 2.6vw, 2rem);
  line-height: 1.18;
  letter-spacing: -.01em;
}
.page-faq .faq-tail__text {
  margin: 0;
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(23, 17, 13, .76);
}
.page-faq .faq-tail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-faq .faq-tail__item {
  display: grid;
  gap: 4px;
  padding: 14px 16px;
  border: 1px solid var(--paper-line);
  border-radius: var(--r-md);
  background: rgba(255, 255, 255, .66);
}
.page-faq .faq-tail__k {
  font-size: .72rem;
  letter-spacing: .18em;
  color: rgba(23, 17, 13, .58);
}
.page-faq .faq-tail__v {
  font-family: var(--font-mono);
  font-size: .96rem;
  color: var(--brown);
  text-decoration: none;
  word-break: break-all;
  border-bottom: 1px solid rgba(23, 17, 13, .22);
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.page-faq .faq-tail__v:hover,
.page-faq .faq-tail__v:focus-visible {
  color: var(--grass);
  border-bottom-color: var(--grass);
}

/* --- 响应式 --- */
@media (min-width: 620px) {
  .page-faq .faq-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-faq .faq-stat {
    padding: 16px 18px;
  }
}

@media (min-width: 860px) {
  .page-faq .faq-tail__card {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: center;
  }
  .page-faq .faq-group__figure img {
    max-height: 320px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    align-items: center;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 272px) minmax(0, 1fr);
    align-items: start;
  }
  .page-faq .faq-rail {
    position: sticky;
    top: 92px;
    padding: 20px 18px;
  }
  .page-faq .faq-rail__list {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 560px) {
  .page-faq .faq-rail__list {
    grid-template-columns: minmax(0, 1fr);
  }
  .page-faq .faq-hero__title {
    max-width: none;
  }
  .page-faq .faq-more {
    justify-content: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .accordion__item,
  .page-faq .accordion__trigger,
  .page-faq .faq-toggle::before,
  .page-faq .faq-toggle::after,
  .page-faq .faq-rail__link,
  .page-faq .faq-link,
  .page-faq .faq-more a,
  .page-faq .faq-tail__v {
    transition: none;
  }
}