.page-faq {
  --faq-line: rgba(183, 196, 212, .18);
  --faq-dot: rgba(183, 196, 212, .34);
  --faq-panel: rgba(16, 48, 79, .48);
  --faq-shadow: 0 14px 30px -20px rgba(5, 11, 20, .55);
  background: var(--deep-900);
  color: var(--mist-300);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-faq > .breadcrumb {
  padding-top: 18px;
}
.page-faq > .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .05em;
  color: var(--stone-500);
}
.page-faq > .breadcrumb li + li::before {
  content: "/";
  margin: 0 9px;
  opacity: .55;
}
.page-faq > .breadcrumb a {
  color: var(--mist-300);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.page-faq > .breadcrumb a:hover,
.page-faq > .breadcrumb a:focus-visible {
  color: var(--cyan-400);
  border-bottom-color: var(--cyan-400);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(32px, 5vw, 56px) 0 clamp(52px, 7vw, 92px);
  background:
    radial-gradient(115% 82% at 84% 4%, rgba(53, 232, 210, .15), transparent 58%),
    linear-gradient(180deg, var(--ink-950) 0%, var(--deep-900) 68%, var(--deep-900) 100%);
}
.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  align-items: center;
}
.page-faq .faq-hero__text {
  min-width: 0;
}
.page-faq .faq-hero__title {
  font-family: var(--font-head);
  font-size: clamp(2.4rem, 7.4vw, 4.4rem);
  font-weight: 700;
  letter-spacing: -.015em;
  line-height: 1.06;
  color: var(--paper-50);
  margin: 14px 0 0;
}
.page-faq .faq-hero__lead {
  margin: 20px 0 0;
  max-width: 46ch;
  font-size: clamp(1rem, 1.3vw, 1.15rem);
  line-height: 1.85;
  color: var(--mist-300);
}
.page-faq .faq-hero__meta {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  font-size: .78rem;
  letter-spacing: .04em;
  color: var(--stone-500);
}
.page-faq .faq-hero__meta li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.page-faq .faq-hero__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan-400);
  box-shadow: 0 0 0 3px rgba(53, 232, 210, .16);
}
.page-faq .faq-hero__figure {
  position: relative;
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--faq-line);
  background: var(--deep-700);
}
.page-faq .faq-hero__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(183, 196, 212, .10) 1px, transparent 1px),
    linear-gradient(90deg, rgba(183, 196, 212, .10) 1px, transparent 1px);
  background-size: 44px 44px;
  mix-blend-mode: screen;
}
.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}
.page-faq .faq-hero__figure .media-frame__caption {
  position: absolute;
  left: 16px;
  bottom: 14px;
  z-index: 2;
  padding: 5px 10px;
  border-radius: var(--radius-pill);
  background: rgba(5, 11, 20, .68);
  color: var(--mist-300);
  font-size: .7rem;
  letter-spacing: .08em;
  backdrop-filter: blur(6px);
}

/* ---------- 快捷四问 ---------- */
.page-faq .faq-quick {
  padding: clamp(48px, 6vw, 84px) 0;
  background: var(--paper-100);
  color: var(--ink-on-paper);
}
.page-faq .faq-quick__head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: clamp(24px, 3vw, 38px);
}
.page-faq .faq-quick__head .section-number {
  font-size: clamp(1.9rem, 4.6vw, 3.1rem);
  line-height: 1;
  font-weight: 700;
  color: var(--orange-500);
}
.page-faq .faq-quick__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -.01em;
  line-height: 1.15;
  color: var(--ink-950);
}
.page-faq .quick-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
.page-faq .quick-card {
  background: var(--paper-50);
  border: 1px solid rgba(51, 64, 79, .14);
  border-left: 3px solid var(--cyan-700);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  transition: box-shadow .25s var(--ease), transform .25s var(--ease), border-color .25s var(--ease);
}
.page-faq .quick-card[open] {
  box-shadow: 0 12px 26px -20px rgba(5, 11, 20, .55);
}
.page-faq .quick-card:hover {
  transform: translateY(-2px);
  border-color: rgba(14, 142, 133, .5);
  border-left-color: var(--cyan-700);
}
.page-faq .quick-card > summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-size: clamp(1.05rem, 1.7vw, 1.22rem);
  font-weight: 600;
  letter-spacing: -.01em;
  line-height: 1.4;
  color: var(--ink-950);
}
.page-faq .quick-card > summary::-webkit-details-marker {
  display: none;
}
.page-faq .quick-card > summary::before {
  content: "Q";
  flex: none;
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 500;
  color: var(--cyan-700);
  border: 1px solid currentColor;
  border-radius: var(--radius-sm);
  padding: 1px 5px;
  transform: translateY(-2px);
}
.page-faq .quick-card > summary::after {
  content: "\2212";
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--stone-500);
  transition: color .2s var(--ease);
}
.page-faq .quick-card:not([open]) > summary::after {
  content: "+";
}
.page-faq .quick-card:hover > summary::after {
  color: var(--cyan-700);
}
.page-faq .quick-card p {
  margin: 12px 0 0;
  padding-left: 30px;
  font-size: .94rem;
  line-height: 1.85;
  color: var(--ink-on-paper);
}

/* ---------- 主问答区 ---------- */
.page-faq .faq-main {
  position: relative;
  padding: clamp(52px, 7vw, 104px) 0 clamp(64px, 8vw, 116px);
  background:
    radial-gradient(85% 55% at 8% 0%, rgba(53, 232, 210, .11), transparent 62%),
    var(--deep-900);
}
.page-faq .faq-main__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
}

/* 左栏索引 */
.page-faq .faq-index {
  min-width: 0;
}
.page-faq .faq-index__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: .74rem;
  font-weight: 500;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--stone-500);
}
.page-faq .index-list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--deep-600) transparent;
}
.page-faq .index-list li {
  flex: none;
}
.page-faq .index-link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 8px 15px;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-pill);
  color: var(--mist-300);
  font-size: .88rem;
  white-space: nowrap;
  text-decoration: none;
  transition: color .22s var(--ease), border-color .22s var(--ease), background-color .22s var(--ease);
}
.page-faq .index-link:hover,
.page-faq .index-link:focus-visible {
  color: var(--cyan-400);
  border-color: var(--cyan-400);
  background: rgba(53, 232, 210, .08);
}
.page-faq .index-num {
  font-size: .72rem;
  letter-spacing: .04em;
  color: var(--orange-500);
}

/* 右栏分组 */
.page-faq .faq-groups {
  min-width: 0;
}
.page-faq .faq-group {
  scroll-margin-top: 104px;
}
.page-faq .faq-group + .faq-group {
  margin-top: clamp(38px, 5vw, 62px);
  padding-top: clamp(38px, 5vw, 62px);
  border-top: 1px dashed var(--faq-dot);
}
.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 20px;
}
.page-faq .faq-group__num {
  font-size: .82rem;
  font-weight: 500;
  letter-spacing: .1em;
  color: var(--cyan-400);
}
.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(1.65rem, 3.2vw, 2.35rem);
  font-weight: 700;
  letter-spacing: -.01em;
  line-height: 1.12;
  color: var(--paper-50);
}

/* 组内插图 */
.page-faq .faq-figure {
  margin: 0 0 22px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--faq-line);
  background: var(--deep-700);
}
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}
.page-faq .faq-figure .media-frame__caption {
  display: block;
  padding: 10px 16px;
  background: rgba(5, 11, 20, .55);
  color: var(--stone-500);
  font-size: .7rem;
  letter-spacing: .08em;
}

/* 问答条目 */
.page-faq .faq-item {
  background: var(--faq-panel);
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color .25s var(--ease), transform .25s var(--ease), box-shadow .25s var(--ease);
}
.page-faq .faq-item + .faq-item {
  margin-top: 10px;
}
.page-faq .faq-item:hover {
  border-color: rgba(53, 232, 210, .42);
  transform: translateY(-2px);
  box-shadow: var(--faq-shadow);
}
.page-faq .faq-item[open] {
  border-color: rgba(53, 232, 210, .52);
}
.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 17px 20px;
  cursor: pointer;
  list-style: none;
  font-size: 1rem;
  line-height: 1.62;
  color: var(--paper-50);
  transition: color .2s var(--ease);
}
.page-faq .faq-item__q::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item__q:hover,
.page-faq .faq-item__q:focus-visible {
  color: var(--cyan-400);
}
.page-faq .faq-item__q::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  line-height: 1.4;
  color: var(--cyan-400);
  transition: transform .22s var(--ease);
}
.page-faq .faq-item[open] .faq-item__q::after {
  transform: rotate(45deg);
}
.page-faq .faq-item__a {
  padding: 16px 20px 22px 24px;
  background: var(--paper-50);
  border-left: 3px solid var(--cyan-400);
  color: var(--ink-on-paper);
  font-size: .94rem;
  line-height: 1.85;
}
.page-faq .faq-item__a p {
  margin: 0;
}
.page-faq .faq-item__a a {
  color: var(--cyan-700);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.page-faq .faq-item__a a:hover {
  color: var(--deep-600);
}

/* 联系分组 */
.page-faq .faq-contact {
  padding: clamp(24px, 3vw, 36px);
  background: var(--faq-panel);
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-lg);
}
.page-faq .faq-contact__lead {
  margin: 0 0 26px;
  max-width: 62ch;
  font-size: .96rem;
  line-height: 1.85;
  color: var(--mist-300);
}
.page-faq .contact-rows {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin: 0 0 28px;
}
.page-faq .contact-rows div {
  min-width: 0;
  padding-left: 14px;
  border-left: 2px solid rgba(53, 232, 210, .35);
}
.page-faq .contact-rows dt {
  margin-bottom: 7px;
  font-size: .72rem;
  letter-spacing: .13em;
  color: var(--stone-500);
}
.page-faq .contact-rows dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .93rem;
  line-height: 1.55;
  color: var(--paper-50);
  overflow-wrap: anywhere;
}
.page-faq .contact-rows dd a {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .2s var(--ease);
}
.page-faq .contact-rows dd a:hover {
  border-bottom-color: var(--cyan-400);
}
.page-faq .faq-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .quick-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }
  .page-faq .contact-rows {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 54px;
  }
  .page-faq .faq-hero__figure {
    margin-top: -18px;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-main__grid {
    grid-template-columns: minmax(0, 232px) minmax(0, 1fr);
    gap: 62px;
    align-items: start;
  }
  .page-faq .faq-index {
    position: sticky;
    top: 108px;
  }
  .page-faq .index-list {
    flex-direction: column;
    gap: 1px;
    overflow: visible;
    padding-bottom: 0;
  }
  .page-faq .index-list li {
    flex: 1 1 auto;
  }
  .page-faq .index-link {
    width: 100%;
    border: none;
    border-left: 2px solid transparent;
    border-radius: 0;
    padding: 11px 12px;
    font-size: .9rem;
    transition: color .22s var(--ease), border-color .22s var(--ease), background-color .22s var(--ease);
  }
  .page-faq .index-link:hover,
  .page-faq .index-link:focus-visible {
    border-left-color: var(--cyan-400);
    background: rgba(53, 232, 210, .07);
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-hero__grid {
    gap: 72px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .quick-card,
  .page-faq .faq-item,
  .page-faq .index-link,
  .page-faq .faq-item__q,
  .page-faq .faq-item__q::after {
    transition: none;
  }
  .page-faq .quick-card:hover,
  .page-faq .faq-item:hover {
    transform: none;
  }
}
</main>