.page-faq {
  --faq-shadow-violet: 8px 8px 0 rgba(138, 107, 255, 0.3);
  --faq-shadow-amber: 8px 8px 0 rgba(255, 179, 71, 0.24);
  background: var(--ink-800);
  color: var(--mist);
  font-family: var(--font-body);
  overflow-x: clip;
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(2rem, 5vw, 3.4rem) 0 clamp(2.4rem, 5vw, 4.2rem);
  background:
    radial-gradient(120% 90% at 84% 6%, rgba(138, 107, 255, 0.3), transparent 58%),
    radial-gradient(85% 75% at 4% 100%, rgba(53, 230, 210, 0.16), transparent 62%),
    var(--ink-900);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(201, 214, 240, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201, 214, 240, 0.055) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

.page-faq .faq-hero .container {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: var(--grid-gap);
  margin-top: clamp(1.4rem, 3vw, 2.2rem);
}

.page-faq .faq-hero__title {
  margin: 0.6rem 0 0;
  max-width: 22ch;
  font-family: var(--font-head);
  font-size: clamp(2.1rem, 5.6vw, 4.2rem);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-faq .faq-hero__title span {
  background: linear-gradient(180deg, transparent 64%, rgba(53, 230, 210, 0.34) 64%);
}

.page-faq .faq-hero__lead {
  margin: 1.25rem 0 0;
  max-width: 60ch;
  font-size: 1.0625rem;
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .faq-hero__aside {
  align-self: end;
  border: 2px solid var(--cyan);
  box-shadow: var(--shadow-hard);
  background: rgba(11, 22, 51, 0.76);
  padding: 1.15rem 1.25rem;
}

.page-faq .faq-stats {
  margin: 0;
  display: grid;
  gap: 0.7rem;
}

.page-faq .faq-stats__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px dashed rgba(74, 90, 128, 0.6);
}

.page-faq .faq-stats__row:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-faq .faq-stats dt {
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.page-faq .faq-stats dd {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1rem;
  color: var(--paper);
}

.page-faq .faq-stats .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--amber);
}

/* ============ 快速入口条 ============ */
.page-faq .faq-jump {
  background: var(--ink-900);
  border-top: 2px solid var(--ink-700);
  border-bottom: 2px solid var(--ink-700);
}

.page-faq .faq-jump__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem 1.25rem;
  padding: 0.9rem 0;
}

.page-faq .faq-jump__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--slate);
  text-transform: uppercase;
}

.page-faq .faq-jump__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 0.8rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-jump__list a {
  display: inline-block;
  padding: 0.42rem 0.9rem;
  border: 2px solid var(--cyan);
  color: var(--paper);
  font-size: 0.875rem;
  line-height: 1.2;
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-jump__list a:hover,
.page-faq .faq-jump__list a:focus-visible {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink-900);
  transform: translate(-2px, -2px);
}

/* ============ 问答分组 ============ */
.page-faq .faq-group {
  padding: clamp(2.4rem, 5vw, 4.4rem) 0;
  background: var(--ink-800);
}

.page-faq .faq-group--deep {
  background: var(--ink-900);
  position: relative;
}

.page-faq .faq-group--deep::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--violet) 55%, transparent);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.3rem;
  padding-bottom: 1.1rem;
  margin-bottom: var(--grid-gap);
  border-bottom: var(--line);
}

.page-faq .faq-group__index {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.5rem, 3.6vw, 2.2rem);
  font-weight: 800;
  line-height: 1;
  color: rgba(53, 230, 210, 0.42);
}

.page-faq .faq-group__head h2 {
  margin: 0.35rem 0 0;
  font-family: var(--font-head);
  font-size: clamp(1.4rem, 3.1vw, 2.2rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-group__note {
  margin: 0.5rem 0 0;
  max-width: 62ch;
  font-size: 0.95rem;
  line-height: 1.72;
  color: var(--mist);
  opacity: 0.84;
}

/* ============ 组内布局 ============ */
.page-faq .faq-group__body {
  display: grid;
  gap: var(--grid-gap);
}

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

/* ============ 单条问答 ============ */
.page-faq .faq-item {
  border: var(--line);
  border-left: 3px solid var(--slate);
  background: rgba(6, 11, 26, 0.52);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-faq .faq-item:hover {
  border-left-color: var(--cyan);
}

.page-faq .faq-item:has(.disclosure__trigger[aria-expanded="true"]) {
  border-left-color: var(--cyan);
  box-shadow: 6px 6px 0 rgba(53, 230, 210, 0.2);
}

.page-faq .faq-item__h {
  margin: 0;
  font-size: 1rem;
  font-weight: 400;
}

.page-faq .faq-item__trigger {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: 0.55rem 0.8rem;
  width: 100%;
  padding: 0.95rem 1rem;
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
  font: inherit;
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
}

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

.page-faq .faq-item__num {
  padding-top: 0.2em;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--slate);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-item:has(.disclosure__trigger[aria-expanded="true"]) .faq-item__num {
  color: var(--cyan);
}

.page-faq .faq-item__q {
  display: block;
  min-width: 0;
}

.page-faq .faq-mark {
  position: relative;
  width: 20px;
  height: 20px;
  flex: 0 0 auto;
  border: 2px solid var(--cyan);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-mark::before,
.page-faq .faq-mark::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-mark::before {
  left: 4px;
  right: 4px;
  top: 50%;
  height: 2px;
  transform: translateY(-50%);
}

.page-faq .faq-mark::after {
  top: 4px;
  bottom: 4px;
  left: 50%;
  width: 2px;
  transform: translateX(-50%);
}

.page-faq .faq-item:has(.disclosure__trigger[aria-expanded="true"]) .faq-mark {
  transform: rotate(90deg);
  border-color: var(--amber);
}

.page-faq .faq-item:has(.disclosure__trigger[aria-expanded="true"]) .faq-mark::before,
.page-faq .faq-item:has(.disclosure__trigger[aria-expanded="true"]) .faq-mark::after {
  background: var(--amber);
}

.page-faq .faq-item:has(.disclosure__trigger[aria-expanded="true"]) .faq-mark::after {
  opacity: 0;
  transform: translateX(-50%) scaleY(0.2);
}

/* ============ 答案区 ============ */
.page-faq .faq-item__panel {
  position: relative;
  background: var(--paper);
  color: var(--paper-ink);
  border-top: 2px solid var(--cyan);
}

.page-faq .faq-item__panel::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--cyan), var(--violet));
}

.page-faq .faq-item__body {
  padding: 0.95rem 1rem 1.1rem 1.15rem;
  font-size: 0.95rem;
  line-height: 1.74;
}

.page-faq .faq-item__body p {
  margin: 0;
}

.page-faq .faq-item__body p + p {
  margin-top: 0.6rem;
}

.page-faq .faq-item__body a {
  color: var(--ink-800);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-color: var(--slate);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  transition: text-decoration-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-item__body a:hover,
.page-faq .faq-item__body a:focus-visible {
  color: var(--ink-900);
  text-decoration-color: var(--cyan);
}

.page-faq .faq-steps {
  margin: 0;
  padding-left: 1.15rem;
}

.page-faq .faq-steps li {
  margin-bottom: 0.4rem;
}

.page-faq .faq-steps li:last-child {
  margin-bottom: 0;
}

.page-faq .faq-steps strong {
  color: var(--ink-900);
}

/* ============ 图片 ============ */
.page-faq .faq-media {
  margin: 0;
  align-self: start;
}

.page-faq .faq-media__frame {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border: 2px solid var(--cyan);
  box-shadow: var(--shadow-hard);
}

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

.page-faq .faq-media__cap {
  margin-top: 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.page-faq .faq-band {
  margin: 0 0 var(--grid-gap);
}

.page-faq .faq-band__frame {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 2px solid var(--violet);
  box-shadow: var(--faq-shadow-violet);
}

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

.page-faq .faq-band__cap {
  margin-top: 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--slate);
}

/* ============ 结尾条 ============ */
.page-faq .faq-outro {
  background: var(--ink-900);
  border-top: 2px solid var(--amber);
  padding: clamp(1.8rem, 4vw, 3rem) 0;
}

.page-faq .faq-outro__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem 2rem;
}

.page-faq .faq-outro__text {
  margin: 0;
  max-width: 56ch;
  font-size: 1rem;
  line-height: 1.76;
  color: var(--mist);
}

.page-faq .faq-outro .btn {
  box-shadow: var(--faq-shadow-amber);
}

/* ============ 响应式 ============ */
@media (min-width: 720px) {
  .page-faq .faq-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-band__frame {
    aspect-ratio: 3 / 1;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.75fr) minmax(0, 0.75fr);
    align-items: end;
  }

  .page-faq .faq-group__head {
    grid-template-columns: minmax(0, 96px) minmax(0, 1fr);
    column-gap: 1.25rem;
    align-items: start;
  }

  .page-faq .faq-group__index {
    grid-row: 1 / span 2;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-group__body--media {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
  }

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

  .page-faq .faq-list--three {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-jump__list a,
  .page-faq .faq-item,
  .page-faq .faq-item__num,
  .page-faq .faq-mark,
  .page-faq .faq-mark::before,
  .page-faq .faq-mark::after,
  .page-faq .faq-item__body a {
    transition-duration: 0.01ms;
  }

  .page-faq .faq-jump__list a:hover,
  .page-faq .faq-jump__list a:focus-visible {
    transform: none;
  }
}