.page-faq {
  --faq-cell: 80px;
  --faq-line: #263C5C;
  --faq-line-soft: rgba(38, 60, 92, 0.55);
  display: block;
  background: var(--rk-navy);
  color: var(--rk-paper);
  font-family: var(--rk-sans);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

.page-faq a {
  color: inherit;
}

.page-faq .rk-title {
  font-family: var(--rk-sans);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.16;
  margin: 0;
  color: var(--rk-paper);
  text-wrap: balance;
}

.page-faq .rk-kicker {
  margin: 0 0 14px;
  font-family: var(--rk-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--rk-mint);
}

.page-faq .rk-lead {
  margin: 22px 0 0;
  max-width: 32em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--rk-mist);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(32px, 6vw, 76px) clamp(48px, 8vw, 104px);
  background:
    linear-gradient(158deg, var(--rk-navy-2) 0%, var(--rk-navy-2) 44%, rgba(15, 36, 64, 0) 44.3%),
    var(--rk-navy);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--faq-line-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--faq-line-soft) 1px, transparent 1px);
  background-size: var(--faq-cell) var(--faq-cell);
  opacity: 0.42;
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: min(46%, 620px);
  height: 1px;
  background: linear-gradient(to left, var(--rk-mint), rgba(23, 210, 166, 0));
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  align-items: center;
}

.page-faq .faq-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 26px;
  font-family: var(--rk-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--rk-mist);
}

.page-faq .faq-crumbs a {
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 180ms var(--rk-ease), border-color 180ms var(--rk-ease);
}

.page-faq .faq-crumbs a:hover,
.page-faq .faq-crumbs a:focus-visible {
  color: var(--rk-mint-soft);
  border-bottom-color: var(--rk-mint);
}

.page-faq .rk-title--page {
  font-size: clamp(30px, 7vw, 56px);
  font-weight: 600;
  max-width: 12em;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.page-faq .rk-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 24px;
  border: 1px solid var(--rk-mint);
  background: transparent;
  color: var(--rk-mint);
  font-family: var(--rk-sans);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 180ms var(--rk-ease), color 180ms var(--rk-ease), border-color 180ms var(--rk-ease);
}

.page-faq .rk-btn--solid {
  background: var(--rk-mint);
  color: var(--rk-navy);
}

.page-faq .rk-btn--solid:hover,
.page-faq .rk-btn--solid:focus-visible {
  background: var(--rk-mint-soft);
  border-color: var(--rk-mint-soft);
}

.page-faq .rk-btn--ghost {
  border-color: var(--rk-line);
  color: var(--rk-mist);
}

.page-faq .rk-btn--ghost:hover,
.page-faq .rk-btn--ghost:focus-visible {
  border-color: var(--rk-mint);
  color: var(--rk-mint-soft);
}

.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(128px, 1fr));
  gap: 20px 24px;
  margin: 38px 0 0;
  padding-top: 24px;
  border-top: 1px solid var(--rk-line);
}

.page-faq .faq-hero__stat dt {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--rk-mist);
}

.page-faq .faq-hero__stat dd {
  margin: 0;
  font-family: var(--rk-mono);
  font-size: 20px;
  letter-spacing: 0.04em;
  color: var(--rk-mint-soft);
}

.page-faq .faq-hero__media {
  position: relative;
  display: block;
  margin: 0;
  overflow: hidden;
  aspect-ratio: 3 / 2;
  background: var(--rk-indigo);
}

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

.page-faq .rk-media__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 32px 18px 14px;
  font-family: var(--rk-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--rk-paper);
  background: linear-gradient(to top, rgba(8, 23, 43, 0.94), rgba(8, 23, 43, 0));
}

/* ---------- 分类与答疑 ---------- */

.page-faq .faq-cats {
  padding-block: clamp(44px, 7vw, 88px) clamp(52px, 9vw, 108px);
  background: var(--rk-navy);
}

.page-faq .faq-cats__head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: end;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--rk-line);
}

.page-faq .faq-cats__title {
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 600;
}

.page-faq .faq-cats__note {
  margin: 18px 0 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--rk-mist);
}

.page-faq .faq-cats__media {
  display: block;
  margin: 0;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--rk-indigo);
}

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

.page-faq .faq-tabs {
  margin-top: 36px;
}

.page-faq .faq-tablist {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--rk-line);
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-faq .faq-tab {
  appearance: none;
  flex: none;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  margin: 0;
  padding: 15px 18px;
  border: 0;
  border-bottom: 2px solid transparent;
  background: transparent;
  color: var(--rk-mist);
  font-family: var(--rk-sans);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.01em;
  white-space: nowrap;
  cursor: pointer;
  transition: color 180ms var(--rk-ease), border-color 180ms var(--rk-ease);
}

.page-faq .faq-tab:hover {
  color: var(--rk-paper);
}

.page-faq .faq-tab[aria-selected="true"] {
  color: var(--rk-paper);
  font-weight: 700;
  border-bottom-color: var(--rk-mint);
}

.page-faq .faq-tab__num {
  font-family: var(--rk-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--rk-amber);
}

.page-faq .faq-tab[aria-selected="true"] .faq-tab__num {
  color: var(--rk-mint);
}

.page-faq .faq-cats__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  margin-top: 36px;
}

.page-faq .rk-tabpanel[hidden] {
  display: none;
}

.page-faq .faq-panel__intro {
  margin: 0 0 10px;
  padding-bottom: 20px;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--rk-mist);
}

.page-faq .faq-item {
  position: relative;
  border-bottom: 1px solid var(--rk-line);
  padding-left: 0;
  transition: padding-left 200ms var(--rk-ease);
}

.page-faq .faq-item[open] {
  padding-left: 16px;
  background: linear-gradient(to right, rgba(28, 43, 77, 0.5), rgba(28, 43, 77, 0));
}

.page-faq .faq-item[open]::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20px;
  bottom: 22px;
  width: 2px;
  background: var(--rk-mint);
}

.page-faq .faq-item > summary {
  list-style: none;
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 20px 44px 20px 0;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.55;
  color: var(--rk-paper);
  cursor: pointer;
  transition: color 180ms var(--rk-ease);
}

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

.page-faq .faq-item > summary:hover,
.page-faq .faq-item > summary:focus-visible {
  color: var(--rk-mint-soft);
}

.page-faq .faq-item > summary::after {
  content: "+";
  position: absolute;
  right: 10px;
  top: 18px;
  font-family: var(--rk-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--rk-mint);
}

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

.page-faq .faq-item__num {
  flex: none;
  font-family: var(--rk-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--rk-amber);
}

.page-faq .faq-item__body {
  padding: 0 40px 24px 34px;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--rk-mist);
}

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

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

.page-faq .faq-item__body a {
  color: var(--rk-mint-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(23, 210, 166, 0.5);
  transition: border-color 180ms var(--rk-ease);
}

.page-faq .faq-item__body a:hover,
.page-faq .faq-item__body a:focus-visible {
  border-bottom-color: var(--rk-mint);
}

.page-faq .faq-item__path {
  margin-top: 14px;
  padding-left: 12px;
  border-left: 2px solid var(--rk-amber);
  font-family: var(--rk-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--rk-amber-soft);
}

/* ---------- 右侧求助栏 ---------- */

.page-faq .faq-rail {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-faq .faq-rail__card {
  padding: 24px 22px;
  border: 1px solid var(--rk-line);
  background: var(--rk-indigo);
}

.page-faq .faq-rail__card--quiet {
  background: transparent;
}

.page-faq .faq-rail__tag {
  margin: 0 0 14px;
  font-family: var(--rk-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--rk-mint);
}

.page-faq .faq-rail__title {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--rk-paper);
}

.page-faq .faq-rail__text {
  margin: 14px 0 18px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--rk-mist);
}

.page-faq .faq-rail__link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--rk-mint);
  text-decoration: none;
  border-bottom: 1px solid var(--rk-mint);
  padding-bottom: 2px;
  transition: color 180ms var(--rk-ease), border-color 180ms var(--rk-ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--rk-mint-soft);
  border-bottom-color: var(--rk-mint-soft);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-rail__list li {
  border-top: 1px solid var(--rk-line);
}

.page-faq .faq-rail__list li:first-child {
  border-top: 0;
}

.page-faq .faq-rail__list a {
  display: block;
  padding: 11px 0;
  font-size: 14px;
  color: var(--rk-mist);
  text-decoration: none;
  transition: color 180ms var(--rk-ease);
}

.page-faq .faq-rail__list a:hover,
.page-faq .faq-rail__list a:focus-visible {
  color: var(--rk-mint-soft);
}

/* ---------- 人工协助 ---------- */

.page-faq .faq-assist {
  padding-block: clamp(48px, 8vw, 100px);
  background: var(--rk-navy-2);
  border-top: 1px solid var(--rk-line);
}

.page-faq .faq-assist__head {
  max-width: 40em;
}

.page-faq .faq-assist__title {
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 600;
}

.page-faq .faq-assist__note {
  margin: 18px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--rk-mist);
}

.page-faq .faq-assist__list {
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--rk-line);
}

.page-faq .faq-assist__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  padding: 26px 0;
  border-bottom: 1px solid var(--rk-line);
}

.page-faq .faq-assist__num {
  font-family: var(--rk-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--rk-amber);
  padding-top: 5px;
}

.page-faq .faq-assist__item-title {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--rk-paper);
}

.page-faq .faq-assist__item p {
  margin: 0;
  max-width: 42em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--rk-mist);
}

.page-faq .faq-assist__cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px 28px;
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--rk-line);
}

.page-faq .faq-assist__cta p {
  margin: 0;
  flex: 1 1 260px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--rk-mist);
}

/* ---------- 焦点可见性 ---------- */

.page-faq a:focus-visible,
.page-faq button:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--rk-focus);
  outline-offset: 3px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-faq .faq-item > summary {
    font-size: 17px;
  }

  .page-faq .faq-assist__item {
    padding: 30px 0;
    gap: 28px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-cats__head {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: 48px;
  }

  .page-faq .faq-tab {
    padding: 17px 26px;
    font-size: 16px;
  }

  .page-faq .faq-hero__media {
    aspect-ratio: 4 / 3;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: 60px;
    align-items: center;
  }

  .page-faq .faq-hero__media {
    aspect-ratio: 3 / 2;
    clip-path: polygon(0 7%, 100% 0, 100% 93%, 0 100%);
  }

  .page-faq .faq-cats__body {
    grid-template-columns: minmax(0, 1fr) 290px;
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 128px;
  }

  .page-faq .faq-panel__intro {
    font-size: 16px;
  }
}

@media (min-width: 1280px) {
  .page-faq .faq-item__body {
    padding-right: 64px;
  }

  .page-faq .faq-assist__cta {
    justify-content: space-between;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

.page-faq {
  --rk-line: var(--rk-ink);
}