.page-faq {
  --faq-hair: rgba(241, 233, 221, 0.14);
  --faq-panel: #0E2137;
  --faq-panel-soft: rgba(241, 233, 221, 0.045);
}

.page-faq .breadcrumbs {
  padding-top: 18px;
  font-size: var(--fs-index);
  color: var(--text-faint);
}

.page-faq .breadcrumbs__item a {
  color: var(--text-dim);
  text-decoration: none;
}

.page-faq .breadcrumbs__item a:hover,
.page-faq .breadcrumbs__item a:focus-visible {
  color: var(--c-cyan);
}

.page-faq .breadcrumbs__sep {
  margin: 0 8px;
  color: var(--text-faint);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: clamp(22px, 4vw, 44px) 0 clamp(20px, 4vw, 40px);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 26px;
  align-items: end;
}

.page-faq .faq-hero__copy h1 {
  margin: 12px 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 8.6vw, 74px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--c-bone);
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 52ch;
  font-size: var(--fs-lead);
  line-height: 1.8;
  color: var(--text-dim);
}

.page-faq .faq-jump {
  list-style: none;
  margin: 26px 0 0;
  padding: 0 0 8px;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-jump li {
  flex: 0 0 auto;
  scroll-snap-align: start;
}

.page-faq .faq-jump a {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 10px 16px;
  border: 1px solid var(--faq-hair);
  border-radius: 999px;
  background: var(--faq-panel-soft);
  color: var(--text-main);
  font-size: var(--fs-small);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out), background-color var(--dur-fast) var(--ease-out);
}

.page-faq .faq-jump a:hover,
.page-faq .faq-jump a:focus-visible {
  border-color: var(--line-cyan);
  color: var(--c-cyan);
  background: rgba(53, 224, 208, 0.08);
}

.page-faq .faq-jump b {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  font-weight: 500;
  color: var(--c-cyan);
  letter-spacing: 0.08em;
}

.page-faq .faq-hero__media {
  margin: 0;
  border: 1px solid var(--faq-hair);
  border-radius: var(--radius-l);
  overflow: hidden;
  background: var(--c-navy);
}

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

.page-faq .media-frame__caption {
  padding: 10px 14px 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  line-height: 1.6;
  color: var(--text-faint);
}

/* ---------- 问答双列 ---------- */
.page-faq .faq-board {
  padding: clamp(20px, 4vw, 44px) 0 clamp(30px, 5vw, 56px);
}

.page-faq .faq-columns {
  display: grid;
  gap: 16px;
}

.page-faq .faq-block {
  background: var(--faq-panel);
  border: 1px solid var(--faq-hair);
  border-radius: var(--radius-l);
  padding: 22px 18px 8px;
  margin-bottom: 16px;
  scroll-margin-top: 110px;
  transition: border-color var(--dur-mid) var(--ease-out), box-shadow var(--dur-mid) var(--ease-out);
}

.page-faq .faq-block:target {
  border-color: var(--line-cyan);
  box-shadow: var(--shadow-panel);
}

.page-faq .faq-block h2 {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 3.4vw, 26px);
  letter-spacing: -0.01em;
  color: var(--c-bone);
}

.page-faq .section-heading__index {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--c-cyan);
}

.page-faq .faq-block__note {
  margin: 0 0 8px;
  font-size: var(--fs-small);
  line-height: 1.7;
  color: var(--text-faint);
}

.page-faq .qa {
  border-top: 1px solid var(--faq-hair);
}

.page-faq .qa summary {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 10px;
  align-items: start;
  list-style: none;
  cursor: pointer;
  padding: 15px 4px 15px 14px;
  transition: padding-left var(--dur-fast) var(--ease-out);
}

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

.page-faq .qa summary::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: var(--c-cyan);
  opacity: 0;
  transform: scaleY(0.35);
  transform-origin: top;
  transition: opacity var(--dur-mid) var(--ease-out), transform var(--dur-mid) var(--ease-out);
}

.page-faq .qa[open] summary::before {
  opacity: 1;
  transform: scaleY(1);
}

.page-faq .qa[open] summary {
  padding-left: 18px;
}

.page-faq .qa summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.5;
  color: var(--text-faint);
  transition: color var(--dur-fast) var(--ease-out);
}

.page-faq .qa[open] summary::after {
  content: "−";
  color: var(--c-cyan);
}

.page-faq .qa summary:hover::after,
.page-faq .qa summary:focus-visible::after {
  color: var(--c-cyan);
}

.page-faq .qa summary:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 2px;
  border-radius: var(--radius-s);
}

.page-faq .qa__no {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  color: var(--text-faint);
  letter-spacing: 0.04em;
}

.page-faq .qa__q {
  font-size: var(--fs-body);
  font-weight: 600;
  line-height: 1.6;
  color: var(--text-main);
}

.page-faq .qa__a {
  padding: 2px 6px 18px 44px;
  color: var(--text-dim);
}

.page-faq .qa__a p {
  margin: 0 0 9px;
  font-size: var(--fs-small);
  line-height: 1.85;
}

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

.page-faq .num {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--c-orange);
  letter-spacing: 0.01em;
}

/* ---------- 底部求助 ---------- */
.page-faq .faq-help {
  margin-top: 18px;
  padding: clamp(34px, 6vw, 72px) 0 clamp(40px, 6vw, 76px);
  border-top: 1px solid var(--faq-hair);
  background:
    radial-gradient(120% 150% at 100% 0%, rgba(53, 224, 208, 0.1), transparent 58%),
    linear-gradient(150deg, #0B1D31 0%, #06111F 78%);
}

.page-faq .faq-help__grid {
  display: grid;
  gap: 26px;
  align-items: center;
}

.page-faq .faq-help__body h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 5vw, 44px);
  line-height: 1.15;
  letter-spacing: -0.015em;
  color: var(--c-bone);
}

.page-faq .faq-help__body > p {
  margin: 0 0 22px;
  max-width: 46ch;
  font-size: var(--fs-lead);
  line-height: 1.8;
  color: var(--text-dim);
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-bottom: 26px;
}

.page-faq .copy-chip {
  border: 1px dashed var(--line-orange);
  border-radius: 999px;
  background: transparent;
  padding: 10px 18px;
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  color: var(--c-orange);
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
}

.page-faq .copy-chip:hover,
.page-faq .copy-chip:focus-visible {
  border-style: solid;
  border-color: var(--line-cyan);
  color: var(--c-cyan);
}

.page-faq .copy-chip[data-copied="true"] {
  border-style: solid;
  border-color: var(--line-cyan);
  color: var(--c-cyan);
}

.page-faq .faq-help__list {
  margin: 0;
  border-top: 1px solid var(--faq-hair);
}

.page-faq .faq-help__row {
  display: grid;
  gap: 4px;
  padding: 12px 0;
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .faq-help__key {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.08em;
  color: var(--text-faint);
}

.page-faq .faq-help__val {
  margin: 0;
  font-size: var(--fs-small);
  line-height: 1.7;
  color: var(--text-main);
  word-break: break-word;
}

.page-faq .faq-help__media {
  margin: 0;
  border: 1px solid var(--faq-hair);
  border-radius: var(--radius-l);
  overflow: hidden;
  background: var(--c-navy);
}

/* ---------- 中等宽度 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-help__row {
    grid-template-columns: 96px minmax(0, 1fr);
    align-items: baseline;
    gap: 14px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: 44px;
  }

  .page-faq .faq-columns {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 30px;
    align-items: start;
  }

  .page-faq .faq-col:last-child {
    margin-top: 58px;
  }

  .page-faq .faq-block {
    padding: 26px 24px 10px;
  }

  .page-faq .qa__a {
    padding-left: 48px;
  }

  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
    gap: 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa summary,
  .page-faq .qa summary::before,
  .page-faq .qa summary::after,
  .page-faq .faq-jump a,
  .page-faq .faq-block {
    transition: none;
  }
}