.page-faq {
  --faq-side-w: 300px;
  --faq-nav-h: 48px;
  background: var(--ink-950);
  color: var(--text-hi);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: calc(var(--header-h) + 32px) 0 48px;
  isolation: isolate;
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  background-image:
    linear-gradient(rgba(34, 49, 95, 0.35) 1px, transparent 1px),
    linear-gradient(90deg, rgba(34, 49, 95, 0.35) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(circle at 22% 28%, #000 0%, transparent 68%);
  mask-image: radial-gradient(circle at 22% 28%, #000 0%, transparent 68%);
  pointer-events: none;
}
.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(162deg, rgba(43, 240, 208, 0.12) 0%, rgba(5, 10, 30, 0) 46%);
  -webkit-clip-path: polygon(0 0, 100% 0, 100% 68%, 0 100%);
  clip-path: polygon(0 0, 100% 0, 100% 68%, 0 100%);
  pointer-events: none;
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: 24px;
}

.page-faq .faq-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: end;
}

.page-faq .faq-kicker {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--cyan-400);
}

.page-faq .faq-hero h1 {
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(30px, 7vw, 54px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--text-hi);
}

.page-faq .faq-lead {
  margin: 0 0 22px;
  max-width: 46em;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-mid);
}

.page-faq .faq-hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
  color: var(--text-mid);
}
.page-faq .faq-hero-facts li {
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding-left: 14px;
  border-left: 2px solid var(--cyan-700);
}
.page-faq .faq-hero-facts .num {
  font-size: 18px;
  font-weight: 700;
  color: var(--cyan-400);
}

.page-faq .faq-hero-media {
  position: relative;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-700);
  background: var(--ink-900);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  aspect-ratio: 12 / 7;
}
.page-faq .faq-hero-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  max-width: 100%;
}

/* ---------- 主题索引条 ---------- */
.page-faq .faq-index {
  position: sticky;
  top: var(--header-h-solid);
  z-index: 20;
  background: rgba(10, 18, 48, 0.94);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--line-700);
  border-bottom: 1px solid var(--line-700);
}
.page-faq .faq-index .wrap {
  display: flex;
  gap: 2px;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  padding-top: 4px;
  padding-bottom: 4px;
  scrollbar-width: none;
}
.page-faq .faq-index .wrap::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-index-item {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 14px 10px;
  font-size: 14px;
  color: var(--text-mid);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color 200ms ease, border-color 200ms ease;
}
.page-faq .faq-index-item .num {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--cyan-400);
}
.page-faq .faq-index-item:hover,
.page-faq .faq-index-item:focus-visible {
  color: var(--text-hi);
  border-bottom-color: var(--cyan-400);
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  padding-top: 36px;
  padding-bottom: 72px;
}

.page-faq .faq-side {
  display: flex;
  flex-direction: column;
  gap: 20px;
  min-width: 0;
}

.page-faq .faq-search-box {
  padding: 18px;
  border: 1px solid var(--line-700);
  border-radius: var(--radius-md);
  background: var(--ink-900);
}
.page-faq .faq-search-label {
  display: block;
  margin-bottom: 10px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--text-mid);
}
.page-faq .faq-search-field {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid var(--line-700);
  border-radius: var(--radius-pill);
  background: var(--ink-950);
  transition: border-color 200ms ease, box-shadow 200ms ease;
}
.page-faq .faq-search-field svg {
  flex: 0 0 auto;
  color: var(--cyan-400);
}
.page-faq .faq-search-field:focus-within {
  border-color: var(--cyan-400);
  box-shadow: var(--shadow-glow);
}
.page-faq .faq-search-field input {
  flex: 1 1 auto;
  min-width: 0;
  padding: 0;
  border: 0;
  background: none;
  color: var(--text-hi);
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.4;
  outline: none;
  caret-color: var(--cyan-400);
}
.page-faq .faq-search-field input::placeholder {
  color: var(--text-mid);
}
.page-faq .faq-search-field input::-webkit-search-cancel-button {
  -webkit-appearance: none;
  appearance: none;
}
.page-faq .faq-search-hint {
  margin: 12px 0 0;
  font-size: 12px;
  line-height: 1.6;
  color: var(--text-mid);
}

.page-faq .faq-side-title {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--text-mid);
}
.page-faq .faq-hot-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-faq .faq-hot-list a {
  display: inline-block;
  padding: 7px 12px;
  border: 1px solid var(--line-700);
  border-radius: var(--radius-pill);
  font-size: 13px;
  color: var(--text-mid);
  text-decoration: none;
  transition: color 180ms ease, background 180ms ease, border-color 180ms ease;
}
.page-faq .faq-hot-list a:hover,
.page-faq .faq-hot-list a:focus-visible {
  color: var(--ink-950);
  background: var(--cyan-400);
  border-color: var(--cyan-400);
}

.page-faq .faq-side-note {
  padding: 12px 14px;
  background: var(--ink-900);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--text-mid);
}
.page-faq .faq-side-note p {
  margin: 0;
}

/* ---------- 问题分组 ---------- */
.page-faq .faq-groups {
  min-width: 0;
}

.page-faq .faq-group {
  margin-bottom: 46px;
  scroll-margin-top: 120px;
}
.page-faq .faq-group:last-child {
  margin-bottom: 0;
}

.page-faq .faq-group-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--line-700);
}
.page-faq .faq-group-idx {
  font-size: 24px;
  line-height: 1;
  color: var(--cyan-400);
}
.page-faq .faq-group-title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.25;
  letter-spacing: 0.01em;
  color: var(--text-hi);
}
.page-faq .faq-group-count {
  margin-left: auto;
  font-size: 12px;
  color: var(--text-mid);
}

.page-faq .faq-group:target .faq-group-title {
  color: var(--cyan-400);
}

/* 搜索模块的图文说明 */
.page-faq .faq-search-intro {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-bottom: 20px;
  padding: 18px;
  border: 1px solid var(--line-700);
  border-radius: var(--radius-md);
  background: var(--ink-900);
}
.page-faq .faq-search-intro-copy p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-mid);
}
.page-faq .faq-search-intro-copy p:last-child {
  margin-bottom: 0;
}
.page-faq .faq-search-intro-note {
  padding-left: 12px;
  border-left: 2px solid var(--cyan-400);
  font-size: 13px !important;
}
.page-faq .faq-media {
  margin: 0;
  border: 1px solid var(--line-700);
  border-radius: var(--radius-sm);
  background: var(--ink-950);
  overflow: hidden;
}
.page-faq .faq-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-faq .faq-media--portrait {
  max-width: 260px;
}

/* 展开条目 */
.page-faq .faq-item {
  position: relative;
  border-bottom: 1px solid var(--line-700);
  background: transparent;
  transition: background 240ms ease;
}
.page-faq .faq-item:first-of-type {
  border-top: 1px solid var(--line-700);
}
.page-faq .faq-item[open] {
  background: var(--ink-800);
  border-radius: var(--radius-sm);
  border-bottom-color: transparent;
}

.page-faq .faq-q {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 44px 15px 14px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--text-hi);
  transition: color 200ms ease;
}
.page-faq .faq-q::-webkit-details-marker {
  display: none;
}
.page-faq .faq-q::marker {
  content: "";
}
.page-faq .faq-item[open] .faq-q {
  color: var(--cyan-400);
}
.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: -2px;
}

.page-faq .faq-q::after {
  content: "";
  position: absolute;
  right: 18px;
  top: 50%;
  width: 12px;
  height: 2px;
  background: var(--cyan-400);
  transform: translateY(-50%);
  transition: transform 240ms ease;
}
.page-faq .faq-q::before {
  content: "";
  position: absolute;
  right: 23px;
  top: 50%;
  width: 2px;
  height: 12px;
  background: var(--cyan-400);
  transform: translateY(-50%);
  opacity: 1;
  transition: transform 240ms ease, opacity 200ms ease;
}
.page-faq .faq-item[open] .faq-q::before {
  transform: translateY(-50%) rotate(90deg);
  opacity: 0;
}

.page-faq .faq-q-idx {
  flex: 0 0 auto;
  padding-top: 3px;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--cyan-700);
}
.page-faq .faq-item[open] .faq-q-idx {
  color: var(--cyan-400);
}
.page-faq .faq-q-text {
  min-width: 0;
}

.page-faq .faq-a {
  padding: 0 18px 16px 18px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--text-mid);
}
.page-faq .faq-a p {
  margin: 0;
}
.page-faq .faq-a a {
  color: var(--cyan-400);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.page-faq .faq-a a:hover {
  color: var(--orange-500);
}
.page-faq .faq-item[open] .faq-a {
  animation: faq-answer-in 280ms ease both;
}

@keyframes faq-answer-in {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 收尾 CTA */
.page-faq .faq-cta {
  margin-top: 26px;
  padding: 22px;
  border: 1px solid var(--line-700);
  border-radius: var(--radius-md);
  background: linear-gradient(140deg, rgba(43, 240, 208, 0.12) 0%, rgba(10, 18, 48, 0) 62%), var(--ink-900);
}
.page-faq .faq-cta-text {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-mid);
}
.page-faq .faq-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-hero {
    padding: calc(var(--header-h) + 48px) 0 64px;
  }
  .page-faq .faq-group-title {
    font-size: 22px;
  }
  .page-faq .faq-q {
    padding: 16px 48px 16px 18px;
    font-size: 16.5px;
  }
  .page-faq .faq-a {
    padding: 0 48px 18px 60px;
  }
  .page-faq .faq-search-intro {
    grid-template-columns: minmax(0, 1fr) 200px;
    align-items: start;
    gap: 24px;
    padding: 22px;
    margin-bottom: 24px;
  }
  .page-faq .faq-media--portrait {
    max-width: none;
  }
  .page-faq .faq-cta {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 26px;
  }
  .page-faq .faq-cta-text {
    margin: 0;
    flex: 1 1 auto;
    max-width: 40em;
  }
  .page-faq .faq-cta-actions {
    flex: 0 0 auto;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 52px;
  }
  .page-faq .faq-hero-media {
    aspect-ratio: 12 / 8;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-side-w) minmax(0, 1fr);
    gap: 52px;
    padding-top: 56px;
    padding-bottom: 96px;
  }
  .page-faq .faq-side {
    position: sticky;
    top: calc(var(--header-h-solid) + 68px);
  }
  .page-faq .faq-group {
    scroll-margin-top: 140px;
  }
  .page-faq .faq-group-title {
    font-size: 24px;
  }
  .page-faq .faq-group-idx {
    font-size: 28px;
  }
}

@media (min-width: 1240px) {
  .page-faq .faq-side {
    --faq-side-w: 316px;
  }
  .page-faq .faq-search-intro {
    grid-template-columns: minmax(0, 1fr) 220px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item[open] .faq-a {
    animation: none;
  }
  .page-faq .faq-q::before,
  .page-faq .faq-q::after,
  .page-faq .faq-item,
  .page-faq .faq-search-field {
    transition: none;
  }
}