.page-faq {
  --faq-line-light: rgba(26, 31, 51, 0.14);
  --faq-line-dark: rgba(201, 211, 230, 0.2);
  --faq-gap: clamp(16px, 2vw, 28px);
  overflow-x: hidden;
}

/* ---------- 头部 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-top: calc(var(--header-h) + clamp(28px, 6vw, 72px));
  padding-bottom: clamp(40px, 7vw, 96px);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(58% 78% at 88% 14%, rgba(53, 224, 200, 0.16), transparent 62%),
    radial-gradient(52% 66% at 4% 92%, rgba(75, 46, 131, 0.46), transparent 68%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 56px);
  align-items: center;
}

.page-faq .faq-hero__crumb,
.page-faq .faq-hero__crumb a {
  color: var(--silver);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-faq .faq-hero__eyebrow {
  color: var(--aurora);
  margin-top: clamp(18px, 3vw, 30px);
}

.page-faq .faq-hero__title {
  margin: 10px 0 0;
  color: var(--paper);
}

.page-faq .faq-hero__lead {
  margin-top: clamp(16px, 2.4vw, 24px);
  color: var(--silver);
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(20px, 3.4vw, 46px);
  margin: clamp(24px, 4vw, 42px) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__stat b {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.2vw, 40px);
  font-weight: 500;
  line-height: 1.1;
  color: var(--aurora);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-hero__stat span {
  display: block;
  margin-top: 6px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--silver);
}

.page-faq .faq-hero__media {
  border: 1px solid var(--faq-line-dark);
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 章节标题 ---------- */
.page-faq .faq-section-head {
  max-width: 46rem;
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-faq .faq-section-head__title {
  margin: 12px 0 0;
}

.page-faq .faq-section-head__lead {
  margin-top: 16px;
}

.page-faq .faq-section-head--dark .faq-section-head__title {
  color: var(--paper);
}

.page-faq .faq-section-head--dark .faq-section-head__lead {
  color: var(--silver);
}

/* ---------- 常见问题 ---------- */
.page-faq .faq-quick__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
}

.page-faq .faq-quick__item {
  position: relative;
  padding: clamp(20px, 2.4vw, 28px);
  background: var(--mist);
  border-top: 2px solid var(--nebula);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}

.page-faq .faq-quick__item:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 40px -28px rgba(11, 16, 38, 0.6);
}

.page-faq .faq-quick__no {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--ember);
}

.page-faq .faq-quick__q {
  margin: 10px 0 8px;
  font-size: clamp(17px, 1.7vw, 20px);
  font-weight: 500;
  line-height: 1.45;
  color: var(--text);
}

.page-faq .faq-quick__a {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 主题问答 ---------- */
.page-faq .faq-board {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 40px);
  align-items: start;
}

.page-faq .faq-board__index {
  display: flex;
  flex-direction: row;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: thin;
}

.page-faq .faq-tab {
  flex: 0 0 auto;
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 12px 16px;
  border: 1px solid var(--faq-line-light);
  background: transparent;
  color: var(--text);
  font: inherit;
  font-size: 14px;
  text-align: left;
  cursor: pointer;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
  transition: background 0.3s var(--ease), color 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-faq .faq-tab .faq-tab__no {
  font-size: 11px;
  color: var(--nebula);
}

.page-faq .faq-tab .faq-tab__count {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-faq .faq-tab[aria-selected="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.page-faq .faq-tab[aria-selected="true"] .faq-tab__no {
  color: var(--aurora);
}

.page-faq .faq-tab[aria-selected="true"] .faq-tab__count {
  color: var(--silver);
}

.page-faq .faq-tab:focus-visible {
  outline: 2px solid var(--aurora);
  outline-offset: 3px;
}

.page-faq .faq-panel[hidden] {
  display: none;
}

.page-faq .faq-panel {
  animation: faq-panel-in 0.42s var(--ease) both;
}

@keyframes faq-panel-in {
  from {
    opacity: 0;
    transform: translateX(12px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-faq .faq-panel__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 36px);
}

.page-faq .faq-panel__lead {
  margin: 0 0 clamp(10px, 1.6vw, 18px);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.8;
  color: var(--text);
  max-width: 34em;
}

.page-faq .faq-panel__figure {
  margin: 0;
}

.page-faq .faq-panel__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-line-light);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: clamp(16px, 2.2vw, 22px) 0;
  cursor: pointer;
  list-style: none;
  font-size: clamp(15px, 1.6vw, 18px);
  font-weight: 500;
  line-height: 1.55;
  color: var(--text);
  transition: color 0.3s var(--ease);
}

.page-faq .faq-item__q::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item__q:hover {
  color: var(--nebula);
}

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--aurora);
  outline-offset: 2px;
}

.page-faq .faq-item__no {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--nebula);
  padding-top: 0.35em;
}

.page-faq .faq-item__text {
  flex: 1 1 auto;
}

.page-faq .faq-item__mark {
  position: relative;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  margin-top: 0.45em;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  background: var(--nebula);
  transition: transform 0.3s var(--ease), background 0.3s var(--ease);
}

.page-faq .faq-item__mark::before {
  width: 14px;
  height: 2px;
}

.page-faq .faq-item__mark::after {
  width: 2px;
  height: 14px;
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: scaleY(0);
}

.page-faq .faq-item[open] .faq-item__mark::before {
  background: var(--ember);
}

.page-faq .faq-item__a {
  padding: 0 0 clamp(18px, 2.4vw, 24px) 34px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-item__a p {
  margin: 0 0 10px;
}

.page-faq .faq-item__a p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-item__a a {
  color: var(--nebula);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.3s var(--ease);
}

.page-faq .faq-item__a a:hover {
  color: var(--ember);
}

.page-faq .faq-steps {
  list-style: none;
  margin: 12px 0 12px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-steps li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.page-faq .faq-steps .data-num {
  flex: 0 0 auto;
  min-width: 1.4em;
  color: var(--ember);
  font-size: 13px;
}

/* ---------- 联系 ---------- */
.page-faq .faq-help {
  position: relative;
}

.page-faq .faq-help__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.4vw, 44px);
}

.page-faq .faq-help__channels {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
  align-content: start;
}

.page-faq .faq-help__channel {
  padding-left: 18px;
  border-left: 2px solid var(--aurora);
}

.page-faq .faq-help__key {
  display: block;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--silver);
}

.page-faq .faq-help__val {
  display: block;
  margin-top: 8px;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-help__prep {
  padding: clamp(20px, 2.6vw, 30px);
  background: rgba(19, 27, 58, 0.78);
  border: 1px solid var(--faq-line-dark);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

.page-faq .faq-help__prep-title {
  margin: 0 0 14px;
  font-size: clamp(16px, 1.7vw, 19px);
  font-weight: 500;
  color: var(--paper);
}

.page-faq .faq-help__prep-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-help__prep-list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--silver);
}

.page-faq .faq-help__prep-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 1px;
  background: var(--aurora);
}

.page-faq .faq-help__prep-note {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-help__prep-note a {
  color: var(--aurora);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 224, 200, 0.45);
}

.page-faq .faq-help__prep-note a:hover {
  border-bottom-color: var(--aurora);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-quick__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-quick__item:last-child {
    grid-column: span 2;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  }

  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-quick__list {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-faq .faq-quick__item {
    grid-column: span 2;
  }

  .page-faq .faq-quick__item:nth-child(4),
  .page-faq .faq-quick__item:nth-child(5),
  .page-faq .faq-quick__item:last-child {
    grid-column: span 3;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-board {
    grid-template-columns: minmax(220px, 276px) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 60px);
  }

  .page-faq .faq-board__index {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-faq .faq-tab {
    width: 100%;
    justify-content: flex-start;
  }

  .page-faq .faq-tab .faq-tab__count {
    margin-left: auto;
  }
}

@media (min-width: 1240px) {
  .page-faq .faq-panel__body--figure {
    grid-template-columns: minmax(0, 1fr) minmax(0, 300px);
    align-items: start;
  }

  .page-faq .faq-panel__body--figure .faq-panel__figure {
    position: sticky;
    top: calc(var(--header-h) + 36px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .page-faq .faq-quick__item:hover {
    transform: none;
  }
}