.page-faq {
  --faq-radius: 0;
  --faq-gap: clamp(16px, 3vw, 30px);
  padding-bottom: clamp(42px, 8vw, 92px);
}

.page-faq .crumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .04em;
  color: var(--mute);
  padding-top: clamp(14px, 3vw, 24px);
}

.page-faq .crumbs a {
  color: var(--mute);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

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

.page-faq .crumbs__sep { color: var(--line); }
.page-faq .crumbs [aria-current] { color: var(--paper); }

/* —— 首屏 —— */
.page-faq .faq-hero {
  position: relative;
  margin-top: clamp(12px, 2.4vw, 22px);
  padding: clamp(22px, 4vw, 42px) clamp(18px, 3.4vw, 38px) clamp(22px, 3.6vw, 38px);
  background:
    linear-gradient(135deg, rgba(34, 240, 228, .10), transparent 52%),
    linear-gradient(315deg, rgba(168, 85, 247, .14), transparent 58%),
    var(--panel);
  border: var(--edge);
  box-shadow: var(--hard);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -110px;
  bottom: -150px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(34, 240, 228, .22), transparent 68%);
  pointer-events: none;
}

.page-faq .faq-hero__kicker {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 clamp(14px, 2.4vw, 20px);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .06em;
  color: var(--mute);
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 8.4vw, 4.6rem);
  line-height: .98;
  letter-spacing: -.035em;
  color: var(--paper);
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__accent {
  display: inline-block;
  transform: skewX(-6deg);
  color: var(--cyan);
}

.page-faq .faq-hero__lead {
  margin: clamp(14px, 2.6vw, 22px) 0 0;
  max-width: 62ch;
  font-size: var(--fs-17);
  line-height: 1.7;
  color: var(--mute);
  position: relative;
  z-index: 1;
}

.page-faq .faq-jump {
  list-style: none;
  margin: clamp(18px, 3vw, 28px) 0 0;
  padding: 0 0 8px;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  position: relative;
  z-index: 1;
}

.page-faq .faq-jump li { flex: 0 0 auto; }

.page-faq .faq-jump a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: 2px solid var(--line);
  background: var(--ink);
  color: var(--paper);
  font-size: var(--fs-14);
  text-decoration: none;
  white-space: nowrap;
  transition: background .18s var(--ease), border-color .18s var(--ease), transform .18s var(--ease);
}

.page-faq .faq-jump a .numeric {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--cyan);
}

.page-faq .faq-jump a:hover,
.page-faq .faq-jump a:focus-visible {
  background: var(--deck);
  border-color: var(--cyan);
  transform: translateY(-2px);
}

/* —— 分组 —— */
.page-faq .faq-group {
  margin-top: clamp(34px, 6vw, 68px);
  padding-top: clamp(16px, 3vw, 26px);
  border-top: 2px solid var(--line);
  scroll-margin-top: 86px;
}

.page-faq .faq-group--contact {
  border-top-color: var(--amber);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 14px;
  align-items: baseline;
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 5vw, 2.4rem);
  line-height: 1;
  letter-spacing: -.04em;
  color: var(--cyan);
}

.page-faq .faq-group--contact .faq-group__num { color: var(--amber); }

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.3rem, 4.4vw, 2.05rem);
  line-height: 1.15;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-faq .faq-group__note {
  grid-column: 2;
  margin: 6px 0 0;
  font-size: var(--fs-14);
  line-height: 1.6;
  color: var(--mute);
}

/* —— 插图 —— */
.page-faq .faq-figure {
  margin: clamp(16px, 2.8vw, 26px) 0 0;
  border: 2px solid var(--line);
  background: var(--deck);
  box-shadow: var(--hard);
  overflow: hidden;
}

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

.page-faq .faq-figure figcaption {
  padding: 10px 14px;
  border-top: 2px solid var(--line);
  font-size: var(--fs-12);
  font-family: var(--font-mono);
  letter-spacing: .02em;
  color: var(--mute);
  background: var(--panel);
}

/* —— 折叠列表 —— */
.page-faq .faq-list {
  margin-top: clamp(16px, 2.8vw, 26px);
  display: grid;
  gap: 12px;
}

.page-faq .faq-item {
  position: relative;
  background: var(--panel);
  border: 2px solid var(--line);
  padding-left: 8px;
  transition: border-color .2s var(--ease), background .2s var(--ease), box-shadow .2s var(--ease);
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 5px;
  background: var(--cyan);
  opacity: .32;
  transform: scaleY(.38);
  transform-origin: top center;
  transition: transform .22s var(--ease), opacity .22s var(--ease);
}

.page-faq .faq-item:hover { border-color: rgba(34, 240, 228, .45); }

.page-faq .faq-item[open] {
  background: var(--deck);
  border-color: rgba(34, 240, 228, .6);
  box-shadow: 6px 6px 0 rgba(34, 240, 228, .16);
}

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

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px 14px 12px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-17);
  line-height: 1.45;
  color: var(--paper);
}

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

.page-faq .faq-item > summary::after {
  content: "+";
  margin-left: auto;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--fs-22);
  line-height: .9;
  color: var(--cyan);
  transition: transform .2s var(--ease);
}

.page-faq .faq-item[open] > summary::after { transform: rotate(45deg); }

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .faq-item__body {
  padding: 0 16px 16px 12px;
  font-size: var(--fs-17);
  line-height: 1.72;
  color: var(--mute);
}

.page-faq .faq-item__body p { margin: 0 0 10px; }
.page-faq .faq-item__body p:first-child { color: var(--paper); }
.page-faq .faq-item__body p:last-child { margin-bottom: 0; }

.page-faq .faq-item__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 240, 228, .5);
}

.page-faq .faq-item__body a:hover { border-bottom-color: var(--cyan); }

/* —— 步骤 —— */
.page-faq .faq-steps {
  list-style: none;
  counter-reset: faqstep;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-steps li {
  position: relative;
  counter-increment: faqstep;
  padding: 8px 0 8px 42px;
  font-size: var(--fs-14);
  line-height: 1.65;
  border-left: 2px solid var(--line);
  border-left-width: 0;
  background: rgba(14, 20, 36, .6);
}

.page-faq .faq-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 8px;
  top: 10px;
  width: 26px;
  height: 22px;
  display: grid;
  place-items: center;
  background: var(--cyan);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
}

/* —— 记忆窗口 —— */
.page-faq .retention {
  margin-top: clamp(16px, 2.8vw, 24px);
  padding: clamp(14px, 2.6vw, 20px);
  border: 2px dashed var(--line);
  background: rgba(22, 30, 51, .55);
}

.page-faq .retention__title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-faq .retention__bar {
  position: relative;
  height: 12px;
  margin: 12px 0 8px;
  background: linear-gradient(90deg, var(--cyan), var(--pulse));
}

.page-faq .retention__bar::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(90deg, rgba(7, 10, 20, .6) 0 1px, transparent 1px 12px);
}

.page-faq .retention__ticks {
  display: flex;
  justify-content: space-between;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--mute);
}

.page-faq .retention__note {
  margin: 10px 0 0;
  font-size: var(--fs-14);
  line-height: 1.6;
  color: var(--mute);
}

/* —— 图例 —— */
.page-faq .faq-legend {
  list-style: none;
  margin: clamp(14px, 2.4vw, 20px) 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
  font-size: var(--fs-14);
  color: var(--mute);
}

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

.page-faq .dot {
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  border: 2px solid var(--cyan);
}

.page-faq .dot--solid { background: var(--cyan); }
.page-faq .dot--hollow { background: transparent; }

/* —— 联系 —— */
.page-faq .faq-contact {
  margin-top: clamp(18px, 3vw, 26px);
  display: grid;
  gap: 0;
  border: 2px solid var(--line);
  border-left: 5px solid var(--amber);
  background: var(--panel);
  box-shadow: var(--hard);
}

.page-faq .faq-contact__row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  align-items: baseline;
  margin: 0;
  padding: 13px 16px;
  border-bottom: 1px solid var(--line);
}

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

.page-faq .faq-contact__label {
  flex: 0 0 auto;
  min-width: 72px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .08em;
  color: var(--amber);
}

.page-faq .faq-contact__val {
  font-size: var(--fs-17);
  color: var(--paper);
  font-weight: 700;
  word-break: break-word;
}

.page-faq .faq-check {
  list-style: none;
  margin: clamp(16px, 2.8vw, 24px) 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-check li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 12px;
  border: 2px solid var(--line);
  background: var(--ink);
  font-size: var(--fs-14);
  line-height: 1.6;
  color: var(--mute);
}

.page-faq .faq-check li .numeric {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--pulse);
  padding-top: 1px;
}

.page-faq .faq-actions {
  margin-top: clamp(18px, 3vw, 26px);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-actions__note {
  margin: 14px 0 0;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--mute);
  max-width: 64ch;
}

.page-faq .faq-actions__note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 240, 228, .5);
}

.page-faq .faq-actions__note a:hover { border-bottom-color: var(--cyan); }

/* —— 分栏 —— */
.page-faq .faq-split {
  display: grid;
  gap: var(--faq-gap);
  margin-top: clamp(16px, 2.8vw, 26px);
}

.page-faq .faq-split__main { min-width: 0; }
.page-faq .faq-split__side { margin-top: 0; }

@media (min-width: 760px) {
  .page-faq .faq-item > summary {
    padding: 16px 20px 16px 14px;
    font-size: var(--fs-22);
  }

  .page-faq .faq-item__body {
    padding: 0 22px 20px 14px;
    max-width: 72ch;
  }

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

@media (min-width: 980px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, .82fr);
    align-items: start;
  }

  .page-faq .faq-split__side {
    margin-top: 0;
    position: sticky;
    top: 24px;
  }

  .page-faq .faq-hero { padding-right: clamp(40px, 8vw, 110px); }
}

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

  .page-faq .faq-jump a:hover { transform: none; }
}