.page-faq {
  --faq-cut: 14px;
  background: var(--pitch);
  color: var(--chalk);
}

.page-faq .crumbs {
  margin-top: clamp(1.25rem, 3vw, 2rem);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(1.75rem, 4vw, 3rem) 0 clamp(2.5rem, 5vw, 4rem);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(63, 208, 255, 0.13), transparent 60%),
    radial-gradient(85% 70% at 0% 100%, rgba(232, 255, 58, 0.08), transparent 65%);
}

.page-faq .faq-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.75rem, 4vw, 3.5rem);
  align-items: start;
}

.page-faq h1 {
  margin: 0.5rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 7vw, 4.6rem);
  line-height: 0.95;
  letter-spacing: -0.02em;
  color: var(--chalk);
}

.page-faq .faq-lede {
  margin: 1.25rem 0 0;
  max-width: 60ch;
  font-size: var(--t-18);
  line-height: 1.7;
  color: var(--chalk);
}

.page-faq .faq-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.page-faq .faq-jump-label {
  margin: 2.25rem 0 0;
  font-family: var(--font-mono);
  font-size: var(--t-12);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ice);
}

.page-faq .faq-jump-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.75rem;
  margin-top: 0.9rem;
}

.page-faq .faq-jump {
  display: grid;
  gap: 0.3rem;
  padding: 1rem 1.1rem;
  background: rgba(12, 42, 32, 0.85);
  border: 1px solid var(--seam);
  clip-path: polygon(
    var(--faq-cut) 0,
    100% 0,
    100% calc(100% - var(--faq-cut)),
    calc(100% - var(--faq-cut)) 100%,
    0 100%,
    0 var(--faq-cut)
  );
  color: inherit;
  text-decoration: none;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease),
    background var(--dur) var(--ease);
}

.page-faq .faq-jump:hover,
.page-faq .faq-jump:focus-visible {
  transform: translateY(-2px);
  border-color: var(--volt);
  background: rgba(27, 68, 54, 0.9);
}

.page-faq .faq-jump-no {
  font-family: var(--font-mono);
  font-size: var(--t-12);
  letter-spacing: 0.1em;
  color: var(--volt);
}

.page-faq .faq-jump-title {
  font-size: var(--t-18);
  font-weight: 700;
  line-height: 1.3;
}

.page-faq .faq-jump-desc {
  font-size: var(--t-14);
  line-height: 1.5;
  color: var(--mist);
}

/* ---------- 图片容器 ---------- */
.page-faq .faq-media {
  position: relative;
  overflow: hidden;
  margin: 0;
  background: var(--panel);
  border: 1px solid var(--seam);
  clip-path: polygon(
    var(--faq-cut) 0,
    100% 0,
    100% calc(100% - var(--faq-cut)),
    calc(100% - var(--faq-cut)) 100%,
    0 100%,
    0 var(--faq-cut)
  );
}

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

.page-faq .faq-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 42%, rgba(3, 12, 8, 0.74));
  pointer-events: none;
}

.page-faq .faq-media--hero {
  aspect-ratio: 7 / 5;
}

.page-faq .faq-media--grid {
  aspect-ratio: 10 / 7;
}

/* ---------- 数字带 ---------- */
.page-faq .faq-stats {
  padding-bottom: clamp(1.5rem, 3vw, 2.5rem);
}

.page-faq .faq-stat-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--seam);
  border: 1px solid var(--seam);
  border-left: 3px solid var(--volt);
}

.page-faq .faq-stat {
  padding: 1.25rem 1.35rem;
  background: linear-gradient(160deg, rgba(12, 42, 32, 0.96), rgba(6, 21, 15, 0.96));
}

.page-faq .faq-stat-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(1.65rem, 4vw, 2.4rem);
  line-height: 1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--volt);
}

.page-faq .faq-stat-label {
  margin: 0.5rem 0 0;
  font-size: var(--t-14);
  line-height: 1.5;
  color: var(--mist);
}

/* ---------- 双栏主体 ---------- */
.page-faq .faq-body-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(2rem, 4vw, 3.5rem);
  padding: clamp(2.5rem, 5vw, 4rem) 0 clamp(3rem, 6vw, 5rem);
}

.page-faq .faq-index {
  align-self: start;
}

.page-faq .faq-index-title {
  margin: 0 0 0.85rem;
  font-family: var(--font-mono);
  font-size: var(--t-12);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ice);
}

.page-faq .faq-index-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.15rem;
}

.page-faq .faq-index-link {
  display: grid;
  grid-template-columns: 3px minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0.25rem;
  font-size: var(--t-16);
  color: var(--mist);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-index-bar {
  display: block;
  width: 3px;
  height: 1.05em;
  background: var(--seam);
  transition: background var(--dur) var(--ease), height var(--dur) var(--ease);
}

.page-faq .faq-index-count {
  font-family: var(--font-mono);
  font-size: var(--t-12);
  color: var(--ice);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  color: var(--chalk);
}

.page-faq .faq-index-link:hover .faq-index-bar,
.page-faq .faq-index-link:focus-visible .faq-index-bar {
  background: var(--volt);
  height: 1.35em;
}

.page-faq .faq-index-note {
  margin: 1.25rem 0 0;
  padding-top: 1rem;
  border-top: 1px solid var(--seam);
  font-size: var(--t-14);
  line-height: 1.65;
  color: var(--mist);
}

.page-faq .faq-index-note a {
  color: var(--ice);
  text-underline-offset: 3px;
}

.page-faq .faq-index-note a:hover {
  color: var(--volt);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-groups {
  display: grid;
  gap: clamp(2.5rem, 5vw, 4rem);
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: 6.5rem;
  min-width: 0;
}

.page-faq .faq-group-head {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--seam);
}

.page-faq .faq-group-head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 72px;
  height: 3px;
  background: var(--volt);
}

.page-faq .faq-group-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.4vw, 2.25rem);
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--chalk);
}

.page-faq .faq-group-meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--t-12);
  letter-spacing: 0.12em;
  color: var(--ice);
}

.page-faq .faq-list {
  display: grid;
  gap: 0.75rem;
  margin-top: 1.35rem;
}

/* ---------- 手风琴 ---------- */
.page-faq .qa {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--seam);
  clip-path: polygon(
    var(--faq-cut) 0,
    100% 0,
    100% calc(100% - var(--faq-cut)),
    calc(100% - var(--faq-cut)) 100%,
    0 100%,
    0 var(--faq-cut)
  );
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .qa::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: transparent;
  transition: background var(--dur) var(--ease);
}

.page-faq .qa[open] {
  border-color: var(--volt);
  background: linear-gradient(180deg, rgba(27, 68, 54, 0.55), rgba(12, 42, 32, 0.95));
}

.page-faq .qa[open]::before {
  background: var(--volt);
}

.page-faq .qa summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.85rem;
  padding: 1.05rem 1.15rem;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa summary:focus-visible {
  outline: 2px solid var(--ice);
  outline-offset: -2px;
}

.page-faq .qa-no {
  font-family: var(--font-mono);
  font-size: var(--t-14);
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
  color: var(--volt);
}

.page-faq .qa-q {
  margin: 0;
  font-family: var(--font-body);
  font-size: clamp(1rem, 2.2vw, 1.125rem);
  font-weight: 700;
  line-height: 1.45;
  color: var(--chalk);
}

.page-faq .qa-icon {
  position: relative;
  width: 18px;
  height: 18px;
  flex: none;
}

.page-faq .qa-icon::before,
.page-faq .qa-icon::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 2px;
  background: var(--ice);
  transform: translateY(-50%);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .qa-icon::after {
  transform: translateY(-50%) rotate(90deg);
}

.page-faq .qa[open] .qa-icon::before,
.page-faq .qa[open] .qa-icon::after {
  background: var(--volt);
}

.page-faq .qa[open] .qa-icon::after {
  transform: translateY(-50%) rotate(0deg);
}

.page-faq .qa-body {
  padding: 0 1.15rem 1.25rem;
}

.page-faq .qa-body p {
  margin: 0;
  padding-top: 0.9rem;
  max-width: 68ch;
  border-top: 1px dashed rgba(27, 68, 54, 0.9);
  font-size: var(--t-16);
  line-height: 1.75;
  color: var(--chalk);
}

.page-faq .qa[open] .qa-body {
  animation: faqFadeIn 240ms var(--ease) both;
}

@keyframes faqFadeIn {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-faq .faq-aside {
  margin: 1.1rem 0 0;
  font-size: var(--t-14);
  line-height: 1.65;
  color: var(--mist);
}

.page-faq .faq-aside a {
  color: var(--ice);
  text-underline-offset: 3px;
}

.page-faq .faq-aside a:hover {
  color: var(--volt);
}

.page-faq .faq-figure {
  margin: 1.35rem 0 0;
}

/* ---------- 联系客服区 ---------- */
.page-faq .faq-help-card {
  display: grid;
  gap: 1.25rem;
  padding: clamp(1.35rem, 3vw, 2.25rem);
  background: linear-gradient(135deg, rgba(232, 255, 58, 0.12), rgba(12, 42, 32, 0.92) 46%);
  border: 1px solid var(--seam);
  border-top: 3px solid var(--volt);
  clip-path: polygon(
    var(--faq-cut) 0,
    100% 0,
    100% calc(100% - var(--faq-cut)),
    calc(100% - var(--faq-cut)) 100%,
    0 100%,
    0 var(--faq-cut)
  );
}

.page-faq .faq-help-card .qa {
  background: rgba(6, 21, 15, 0.72);
}

.page-faq .faq-contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.75rem;
}

.page-faq .faq-contact-item {
  display: grid;
  gap: 0.35rem;
  justify-items: start;
  padding: 0.9rem 1rem;
  background: rgba(6, 21, 15, 0.78);
  border: 1px solid var(--seam);
}

.page-faq .faq-contact-key {
  font-family: var(--font-mono);
  font-size: var(--t-12);
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-faq .faq-contact-val {
  font-size: var(--t-16);
  line-height: 1.5;
  color: var(--chalk);
  word-break: break-word;
}

.page-faq .faq-contact-val--mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-contact-item .copy-btn {
  margin-top: 0.35rem;
  font-size: var(--t-12);
  padding: 0.35rem 0.85rem;
}

.page-faq .faq-help-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 600px) {
  .page-faq .faq-jump-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-faq .faq-stat-band {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-contact-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-body-grid {
    grid-template-columns: 250px minmax(0, 1fr);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 5.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa[open] .qa-body {
    animation: none;
  }

  .page-faq .faq-jump,
  .page-faq .qa,
  .page-faq .qa-icon::before,
  .page-faq .qa-icon::after,
  .page-faq .faq-index-bar {
    transition: none;
  }
}