.page-faq {
  --faq-rail-w: 268px;
  --faq-line: rgba(30, 58, 95, .9);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-top: clamp(24px, 4vw, 52px);
}

.page-faq .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: clamp(22px, 3vw, 34px);
  font-size: 13px;
  color: var(--c-mist);
}

.page-faq .breadcrumbs a {
  color: var(--c-mist);
  text-decoration: none;
  transition: color .2s var(--ease);
}

.page-faq .breadcrumbs a:hover {
  color: var(--c-orange);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

.page-faq .faq-hero__main {
  max-width: 760px;
}

.page-faq .faq-hero__main h1 {
  margin: 14px 0 20px;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-hero__side {
  position: relative;
  padding: 24px 22px 22px;
  background: linear-gradient(158deg, rgba(30, 58, 95, .92), rgba(10, 26, 47, .97) 64%);
  border: 1px solid rgba(47, 214, 255, .2);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-faq .faq-hero__side::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 54px;
  height: 2px;
  background: var(--c-orange);
}

.page-faq .faq-hero__side-title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--c-orange);
}

.page-faq .faq-hero__side-list {
  list-style: none;
  margin: 14px 0 16px;
  padding: 0;
  display: grid;
  gap: 4px;
}

.page-faq .faq-hero__side-list a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  border-left: 2px solid transparent;
  border-radius: 3px;
  font-size: 14.5px;
  color: var(--c-ice);
  text-decoration: none;
  transition: background .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease);
}

.page-faq .faq-hero__side-list a:hover {
  background: rgba(47, 214, 255, .09);
  border-left-color: var(--c-orange);
  color: #fff;
}

.page-faq .faq-hero__side-list a:focus-visible {
  outline: 2px solid var(--c-neon);
  outline-offset: 2px;
}

.page-faq .faq-hero__side-hint {
  flex: none;
  font-size: 12px;
  color: var(--c-mist);
}

/* ---------- 双栏主体 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-faq .faq-rail {
  position: relative;
}

.page-faq .faq-rail__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--c-mist);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 8px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-faq .faq-rail__list li {
  flex: none;
}

.page-faq .faq-pill {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 10px 16px;
  border: 1px solid rgba(46, 80, 120, .95);
  border-radius: 999px;
  background: rgba(18, 42, 71, .75);
  font-size: 14px;
  color: var(--c-ice);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color .22s var(--ease), background .22s var(--ease), color .22s var(--ease), transform .22s var(--ease);
}

.page-faq .faq-pill:hover {
  border-color: var(--c-orange);
  background: rgba(255, 107, 44, .13);
  color: #fff;
  transform: translateY(-2px);
}

.page-faq .faq-pill:focus-visible {
  outline: 2px solid var(--c-neon);
  outline-offset: 2px;
}

.page-faq .faq-pill__no {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--c-orange);
}

/* ---------- 答案区 ---------- */
.page-faq .faq-answers {
  display: grid;
  gap: 54px;
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: 128px;
  min-width: 0;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-group__index {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--c-orange);
}

.page-faq .faq-group__head h2 {
  margin: 0;
}

.page-faq .faq-group__desc {
  width: 100%;
  margin: 0;
  font-size: 13.5px;
  color: var(--c-mist);
}

.page-faq .faq-list {
  display: grid;
  gap: 10px;
}

.page-faq .faq-item {
  position: relative;
  background: linear-gradient(180deg, rgba(18, 42, 71, .82), rgba(12, 30, 52, .92));
  border: 1px solid var(--faq-line);
  border-radius: 4px;
  transition: border-color .24s var(--ease), box-shadow .24s var(--ease);
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 2px;
  background: transparent;
  transition: background .24s var(--ease);
}

.page-faq .faq-item:hover {
  border-color: rgba(255, 107, 44, .34);
}

.page-faq .faq-item[open] {
  border-color: rgba(255, 107, 44, .5);
  box-shadow: 0 14px 34px rgba(3, 10, 20, .45);
}

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

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px 20px;
  list-style: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--c-ice);
  transition: color .2s var(--ease);
}

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

.page-faq .faq-item__q::after {
  content: "+";
  flex: none;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.2;
  color: var(--c-orange);
}

.page-faq .faq-item[open] .faq-item__q::after {
  content: "−";
}

.page-faq .faq-item__q:hover {
  color: #fff;
}

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

.page-faq .faq-item__a {
  padding: 0 20px 20px;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(206, 224, 240, .87);
}

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

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

.page-faq .faq-item[open] .faq-item__a {
  animation: faq-fade .24s var(--ease);
}

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

/* ---------- 三步时间轴 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 22px 0 0;
  padding: 20px 18px;
  display: grid;
  gap: 18px;
  border: 1px solid var(--faq-line);
  border-radius: 4px;
  background: rgba(12, 28, 48, .6);
}

.page-faq .faq-steps__item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.page-faq .faq-steps__no {
  flex: none;
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border: 1px solid rgba(255, 107, 44, .6);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1;
  color: var(--c-orange);
}

.page-faq .faq-steps__item strong {
  display: block;
  margin-bottom: 2px;
  font-size: 15px;
  color: var(--c-ice);
}

.page-faq .faq-steps__item p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--c-mist);
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 22px 0 0;
  overflow: hidden;
  border: 1px solid var(--faq-line);
  border-radius: 4px;
  background: rgba(18, 42, 71, .5);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.85) contrast(1.05);
}

.page-faq .faq-figure figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-figure--square img {
  aspect-ratio: 1 / 1;
}

/* ---------- 悬浮反馈入口 ---------- */
.page-faq .faq-float {
  position: fixed;
  right: 20px;
  bottom: 88px;
  z-index: 30;
}

/* ---------- 响应式 ---------- */
@media (min-width: 768px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
    padding: 22px 20px;
  }

  .page-faq .faq-steps__item {
    padding: 0 18px;
    border-left: 1px solid var(--faq-line);
  }

  .page-faq .faq-steps__item:first-child {
    padding-left: 0;
    border-left: 0;
  }

  .page-faq .faq-steps__item:last-child {
    padding-right: 0;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: 60px;
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 108px;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 6px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-pill {
    width: 100%;
    border-radius: 4px;
  }

  .page-faq .faq-pill:hover {
    transform: translateX(4px);
  }

  .page-faq .faq-answers {
    gap: 72px;
  }
}

@media (max-width: 640px) {
  .page-faq .faq-item__q {
    padding: 16px 16px;
    font-size: 15.5px;
  }

  .page-faq .faq-item__a {
    padding: 0 16px 18px;
    font-size: 15px;
  }

  .page-faq .faq-float {
    right: 14px;
    bottom: 78px;
  }

  .page-faq .faq-float .btn {
    padding: 10px 14px;
    font-size: 13px;
  }
}

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

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