.page-faq {
  --faq-rail-w: 224px;
  --faq-rail-gap: 48px;
  position: relative;
  isolation: isolate;
  padding-bottom: 88px;
}

.page-faq::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 560px;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(660px 320px at 88% 4%, rgba(198, 255, 61, 0.1), transparent 72%),
    linear-gradient(180deg, rgba(18, 48, 40, 0.72), transparent 88%);
}

.page-faq .breadcrumbs {
  padding-top: 22px;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  padding-block: 28px 52px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: 30px;
  align-items: center;
}

.page-faq .faq-hero__title {
  margin: 12px 0 0;
  max-width: 18ch;
  font-size: clamp(34px, 8.4vw, 62px);
  line-height: 0.98;
  letter-spacing: -0.015em;
  color: var(--white);
}

.page-faq .faq-hero__lede {
  margin-top: 18px;
  max-width: 58ch;
}

.page-faq .faq-hero__quick {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.page-faq .faq-hero__media {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  overflow: hidden;
  background: var(--ink-2);
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ---------- 主体分栏 ---------- */

.page-faq .faq-body {
  display: grid;
  gap: 30px;
  padding-block: 40px 0;
  min-width: 0;
}

.page-faq .faq-rail {
  min-width: 0;
}

.page-faq .faq-rail__label {
  margin: 0 0 12px;
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  min-width: 0;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq .faq-rail__list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-rail__item {
  flex: none;
}

.page-faq .faq-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 10px 15px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: var(--ink-2);
  color: var(--body);
  font-size: 13px;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--white);
  border-color: var(--lime);
}

.page-faq .faq-rail__link[data-active="true"] {
  color: var(--ink);
  background: var(--lime);
  border-color: var(--lime);
  font-weight: 700;
}

.page-faq .faq-rail__num {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--lime);
}

.page-faq .faq-rail__link[data-active="true"] .faq-rail__num {
  color: var(--ink);
}

.page-faq .faq-rail__flow {
  display: none;
  margin-top: 30px;
}

.page-faq .faq-flow {
  display: block;
  width: 100%;
  max-width: 190px;
  height: auto;
}

.page-faq .faq-rail__note {
  display: none;
  margin-top: 16px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-panel {
  display: flex;
  flex-direction: column;
  gap: 52px;
  min-width: 0;
}

/* ---------- 分组标题 ---------- */

.page-faq .faq-group {
  min-width: 0;
  scroll-margin-top: calc(var(--header-h-shrink) + 24px);
}

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 4px;
}

.page-faq .faq-group__num {
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--lime);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(20px, 3.6vw, 28px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-group__note {
  flex-basis: 100%;
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

.page-faq .faq-group__note a {
  color: var(--lime-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 可展开条目 ---------- */

.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
  border-left: 3px solid transparent;
  transition: border-left-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-item[open] {
  border-left-color: var(--lime);
  background: linear-gradient(90deg, rgba(198, 255, 61, 0.05), transparent 62%);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 18px 12px 18px 15px;
  cursor: pointer;
  list-style: none;
  color: var(--white);
  font-size: 15px;
  line-height: 1.55;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

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

.page-faq .faq-item__q:hover {
  background: rgba(198, 255, 61, 0.07);
}

.page-faq .faq-item__qtext {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-item__marker {
  position: relative;
  flex: none;
  width: 20px;
  height: 20px;
  margin-top: 1px;
  border: 1.5px solid var(--line);
  border-radius: 50%;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-item__marker::before,
.page-faq .faq-item__marker::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 8px;
  height: 1.5px;
  background: var(--lime);
  transform: translate(-50%, -50%);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-faq .faq-item__marker::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.page-faq .faq-item[open] .faq-item__marker {
  border-color: var(--lime);
  background: rgba(198, 255, 61, 0.18);
}

.page-faq .faq-item[open] .faq-item__marker::after {
  transform: translate(-50%, -50%) rotate(0deg);
  opacity: 0;
}

.page-faq .faq-item__a {
  padding: 0 14px 22px 47px;
  animation: faq-item-in var(--dur-slow) var(--ease) both;
}

@keyframes faq-item-in {
  from {
    opacity: 0;
    transform: translateY(-5px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-faq .faq-item__lead {
  margin: 0 0 14px;
  padding-left: 12px;
  border-left: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-faq .faq-steps__item {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 11px;
  align-items: start;
}

.page-faq .faq-steps__n {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--ink-2);
  color: var(--lime);
  font-size: 12px;
  font-weight: 700;
}

.page-faq .faq-steps__text {
  margin: 2px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--body);
}

.page-faq .faq-steps__text a {
  color: var(--lime-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 反馈区块 ---------- */

.page-faq .faq-feedback {
  display: grid;
  gap: 26px;
  padding-top: 22px;
}

.page-faq .faq-kinds {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-faq .faq-kinds__item {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--ink-2);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-kinds__item:hover {
  border-color: var(--lime);
  transform: translateY(-2px);
}

.page-faq .faq-kinds__text {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--body);
}

.page-faq .faq-feedback__media {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  overflow: hidden;
  background: var(--ink-2);
}

.page-faq .faq-feedback__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

/* ---------- 联系区块 ---------- */

.page-faq .faq-contact {
  display: grid;
  gap: 16px;
  padding-top: 22px;
}

.page-faq .faq-contact__card {
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(160deg, rgba(18, 48, 40, 0.9), rgba(11, 31, 26, 0.9));
}

.page-faq .faq-contact__key {
  margin: 0 0 8px;
  color: var(--muted);
}

.page-faq .faq-contact__val {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--white);
  word-break: break-word;
}

.page-faq .faq-contact__val a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(198, 255, 61, 0.4);
}

.page-faq .faq-contact__val a:hover {
  color: var(--lime-soft);
  border-bottom-color: var(--lime-soft);
}

.page-faq .faq-contact__desc {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.72;
  color: var(--body);
}

.page-faq .faq-contact__desc a {
  color: var(--lime-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 平板 ---------- */

@media (min-width: 700px) {
  .page-faq .faq-hero {
    padding-block: 34px 62px;
  }

  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 44px;
  }

  .page-faq .faq-feedback {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

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

/* ---------- 桌面 ---------- */

@media (min-width: 980px) {
  .page-faq {
    --faq-rail-gap: 60px;
  }

  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: var(--faq-rail-gap);
    padding-block: 52px 0;
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h-shrink) + 26px);
    align-self: start;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-rail__item {
    flex: initial;
  }

  .page-faq .faq-rail__link {
    width: 100%;
    padding: 10px 0 10px 14px;
    border: 0;
    border-left: 2px solid var(--line);
    border-radius: 0;
    background: transparent;
    white-space: normal;
    font-size: 14px;
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    background: rgba(198, 255, 61, 0.06);
    color: var(--white);
  }

  .page-faq .faq-rail__link[data-active="true"] {
    background: transparent;
    color: var(--white);
    border-left-color: var(--lime);
    font-weight: 700;
  }

  .page-faq .faq-rail__link[data-active="true"] .faq-rail__num {
    color: var(--lime);
  }

  .page-faq .faq-rail__flow,
  .page-faq .faq-rail__note {
    display: block;
  }

  .page-faq .faq-rail__note {
    margin-top: 18px;
  }

  .page-faq .faq-item__q {
    padding: 20px 16px 20px 18px;
    font-size: 16px;
  }

  .page-faq .faq-item__a {
    padding: 0 24px 26px 50px;
  }

  .page-faq .faq-steps {
    gap: 14px;
  }

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

/* ---------- 降低动态偏好 ---------- */

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

  .page-faq .faq-item,
  .page-faq .faq-item__q,
  .page-faq .faq-item__marker,
  .page-faq .faq-item__marker::before,
  .page-faq .faq-item__marker::after,
  .page-faq .faq-kinds__item,
  .page-faq .faq-rail__link {
    transition: none;
  }

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