.page-faq {
  --faq-line: rgba(154, 167, 199, .16);
  --faq-line-strong: rgba(0, 230, 118, .3);
  --faq-gap: clamp(18px, 3vw, 32px);
  min-width: 0;
}

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

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  padding: clamp(22px, 4vw, 38px) 0 clamp(30px, 5vw, 54px);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  left: -12%;
  right: -12%;
  top: -34%;
  height: 150%;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(58% 62% at 84% 18%, rgba(0, 230, 118, .17), transparent 70%),
    radial-gradient(52% 58% at 4% 52%, rgba(124, 77, 255, .21), transparent 72%);
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: clamp(12px, 1.8vw, 20px);
}

.page-faq .faq-hero__inner h1 {
  margin: 0;
  max-width: 17ch;
  font-size: clamp(32px, 6.2vw, 62px);
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--text);
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 62ch;
  color: var(--muted);
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(16px, 3.4vw, 46px);
  margin: clamp(6px, 1.4vw, 14px) 0 0;
  padding-top: clamp(14px, 2.2vw, 22px);
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-stat {
  margin: 0;
  display: grid;
  gap: 2px;
  min-width: 0;
}

.page-faq .faq-stat dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
}

.page-faq .faq-stat dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(19px, 2.6vw, 25px);
  font-weight: 700;
  color: var(--lime);
  line-height: 1.25;
}

.page-faq .faq-stat__num {
  font-size: 1.15em;
}

/* ---------- 分类入口 ---------- */

.page-faq .faq-jump__hint {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 15px;
}

.page-faq .faq-jump__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  margin-top: clamp(20px, 3vw, 32px);
}

.page-faq .faq-card {
  position: relative;
  display: grid;
  gap: 7px;
  padding: 20px 18px 22px;
  border: 1px solid var(--line);
  border-top: 2px solid var(--lime);
  border-radius: var(--radius-sm);
  background: linear-gradient(180deg, rgba(27, 42, 94, .7), rgba(16, 26, 61, .46));
  text-decoration: none;
  color: inherit;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-faq .faq-card:hover,
.page-faq .faq-card:focus-visible {
  transform: translateY(-3px);
  border-color: var(--lime);
  box-shadow: var(--shadow);
  outline: none;
}

.page-faq .faq-card:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
}

.page-faq .faq-card__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--violet);
}

.page-faq .faq-card__title {
  font-size: 19px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.35;
}

.page-faq .faq-card__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-card__go {
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--lime);
}

.page-faq .faq-jump__media {
  margin: clamp(22px, 3.4vw, 36px) 0 0;
}

.page-faq .faq-jump__media .media__frame {
  aspect-ratio: 3 / 2;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--ink-2);
  overflow: hidden;
}

.page-faq .faq-jump__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-faq .faq-jump__media .media__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted);
}

/* ---------- 主体：索引 + 问答 ---------- */

.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 52px);
  padding-top: clamp(30px, 5vw, 58px);
  padding-bottom: clamp(30px, 5vw, 58px);
  min-width: 0;
}

.page-faq .faq-index {
  min-width: 0;
  border-top: 2px solid var(--faq-line-strong);
  padding-top: 12px;
}

.page-faq .faq-index__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--muted);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

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

.page-faq .faq-index__list a {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 14px;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--text);
  border-color: var(--lime);
  background: var(--tint-lime);
  outline: none;
}

.page-faq .faq-index__list a:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--violet);
}

/* 问答组 */

.page-faq .faq-groups {
  display: grid;
  gap: clamp(38px, 5.4vw, 68px);
  min-width: 0;
}

.page-faq .faq-group {
  min-width: 0;
  scroll-margin-top: calc(var(--header-h) + 18px);
}

.page-faq .faq-group__head {
  padding-bottom: 10px;
  border-bottom: 2px solid var(--faq-line-strong);
}

.page-faq .faq-group__head h2 {
  margin: 6px 0 0;
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--text);
}

.page-faq .faq-group__media {
  margin: clamp(18px, 2.6vw, 26px) 0 0;
}

.page-faq .faq-group__media .media__frame {
  aspect-ratio: 10 / 7;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--ink-2);
  overflow: hidden;
}

.page-faq .faq-group__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-faq .faq-group__media .media__caption {
  margin-top: 10px;
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--muted);
}

/* ---------- 折叠问答条目 ---------- */

.page-faq .faq-list {
  display: block;
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-item__q {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-faq .faq-item__trigger {
  width: 100%;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: 10px 12px;
  padding: 17px 4px 17px 0;
  background: none;
  border: 0;
  text-align: left;
  color: var(--text);
  font-family: inherit;
  font-size: clamp(16px, 2vw, 18px);
  font-weight: 600;
  line-height: 1.55;
  cursor: pointer;
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-item__trigger:hover {
  color: var(--lime);
}

.page-faq .faq-item__trigger:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
  border-radius: 4px;
}

.page-faq .disclosure__index {
  padding-top: 5px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--violet);
}

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

.page-faq .disclosure__icon {
  position: relative;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin-top: 7px;
}

.page-faq .disclosure__icon::before,
.page-faq .disclosure__icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--lime);
  border-radius: 2px;
  transform: translate(-50%, -50%);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-faq .disclosure__icon::before {
  width: 14px;
  height: 2px;
}

.page-faq .disclosure__icon::after {
  width: 2px;
  height: 14px;
}

.page-faq .disclosure__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--dur-in) var(--ease);
}

.page-faq .disclosure__panel > div {
  overflow: hidden;
  min-height: 0;
}

.page-faq .disclosure[data-open]:not([data-open="false"]) .disclosure__panel {
  grid-template-rows: 1fr;
}

.page-faq .disclosure[data-open]:not([data-open="false"]) .disclosure__icon::after {
  transform: translate(-50%, -50%) scaleY(0);
  opacity: 0;
}

.page-faq .disclosure[data-open]:not([data-open="false"]) .disclosure__icon::before {
  background: var(--lime);
}

.page-faq .faq-item__answer {
  margin: 0 0 0 6px;
  padding: 0 0 22px 32px;
  border-left: 2px solid var(--lime-deep);
}

.page-faq .faq-item__answer p {
  margin: 0;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

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

.page-faq .faq-item__answer strong {
  color: var(--text);
  font-weight: 600;
}

/* ---------- 结尾引导 ---------- */

.page-faq .faq-help {
  padding-top: clamp(20px, 4vw, 40px);
  padding-bottom: clamp(44px, 7vw, 84px);
}

.page-faq .faq-help__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  min-width: 0;
}

.page-faq .faq-help__main {
  padding: clamp(22px, 3.2vw, 36px);
  border-radius: var(--radius);
  min-width: 0;
}

.page-faq .faq-help__main h2 {
  margin: 8px 0 12px;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.25;
  color: var(--text);
}

.page-faq .faq-help__main p {
  margin: 0 0 20px;
  max-width: 54ch;
  color: var(--muted);
  line-height: 1.8;
}

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

.page-faq .faq-help__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 3px 14px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(16, 26, 61, .55);
  text-decoration: none;
  color: inherit;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-help__link:hover,
.page-faq .faq-help__link:focus-visible {
  border-color: var(--lime);
  background: var(--tint-lime);
  transform: translateX(3px);
  outline: none;
}

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

.page-faq .faq-help__k {
  grid-row: span 2;
  padding-top: 3px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--violet);
}

.page-faq .faq-help__link strong {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}

.page-faq .faq-help__desc {
  font-size: 14px;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 断点 ---------- */

@media (min-width: 640px) {
  .page-faq .faq-jump__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-jump__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-body {
    grid-template-columns: 214px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 18px);
  }

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

  .page-faq .faq-index__list li {
    flex: 0 0 auto;
    width: 100%;
  }

  .page-faq .faq-index__list a {
    width: 100%;
    border: 0;
    border-left: 2px solid var(--faq-line);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    padding: 10px 12px 10px 13px;
    white-space: normal;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .disclosure__panel,
  .page-faq .disclosure__icon::before,
  .page-faq .disclosure__icon::after,
  .page-faq .faq-card,
  .page-faq .faq-help__link,
  .page-faq .faq-index__list a {
    transition: none;
  }

  .page-faq .faq-card:hover,
  .page-faq .faq-help__link:hover {
    transform: none;
  }
}