.page-faq {
  --faq-gap: 26px;
  --faq-panel: rgba(17, 42, 69, .55);
  --faq-panel-soft: rgba(17, 42, 69, .32);
  display: block;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 34px 0 56px;
  background:
    radial-gradient(120% 90% at 82% 8%, rgba(230, 169, 60, .16), transparent 58%),
    radial-gradient(90% 80% at 6% 100%, rgba(111, 168, 160, .16), transparent 62%),
    linear-gradient(180deg, var(--ink-900) 0%, var(--ink-800) 100%);
  border-bottom: 1px solid var(--surface-border);
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 2;
}

.page-faq .faq-hero .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--silver);
}

.page-faq .faq-hero .breadcrumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(170, 182, 196, .5);
}

.page-faq .faq-hero .breadcrumbs a {
  color: var(--silver);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-hero .breadcrumbs a:hover,
.page-faq .faq-hero .breadcrumbs a:focus-visible {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  max-width: 17ch;
  font-family: var(--font-display);
  font-size: clamp(34px, 7.2vw, 76px);
  line-height: 1.02;
  letter-spacing: -.02em;
  color: var(--ivory);
}

.page-faq .faq-hero__lede {
  max-width: 62ch;
  margin: 22px 0 0;
  font-size: 17px;
  line-height: 1.8;
  color: var(--silver);
}

.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__glow {
  position: absolute;
  right: -14%;
  bottom: -40%;
  width: 62vw;
  max-width: 720px;
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 40%, rgba(200, 70, 58, .22), transparent 68%);
  filter: blur(6px);
  pointer-events: none;
}

/* ---------- 两栏骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  padding-top: 40px;
  padding-bottom: 64px;
}

/* ---------- 锚点轨 ---------- */
.page-faq .faq-rail {
  order: -1;
}

.page-faq .faq-rail ul {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  margin: 10px 0 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

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

.page-faq .faq-rail a {
  display: inline-block;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--surface-border);
  background: var(--surface-2);
  color: var(--silver);
  font-size: 14px;
  white-space: nowrap;
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}

.page-faq .faq-rail a:hover,
.page-faq .faq-rail a:focus-visible {
  color: var(--ink-900);
  background: var(--gold);
  border-color: var(--gold);
}

/* ---------- 分组 ---------- */
.page-faq .faq-body {
  display: flex;
  flex-direction: column;
  gap: 54px;
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: 120px;
}

.page-faq .faq-group--tinted {
  position: relative;
  padding: 30px 22px 34px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--surface-border);
  background:
    linear-gradient(160deg, rgba(111, 168, 160, .1), transparent 46%),
    var(--faq-panel-soft);
}

.page-faq .faq-group__head {
  position: relative;
  padding-left: 62px;
  margin-bottom: 24px;
}

.page-faq .faq-group__num {
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 22px;
  letter-spacing: .04em;
  color: var(--gold);
}

.page-faq .faq-group__num::after {
  content: "";
  display: block;
  width: 26px;
  height: 2px;
  margin-top: 8px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--gold), var(--cinnabar));
}

.page-faq .faq-group__head .section-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(23px, 3.6vw, 36px);
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--heading);
}

.page-faq .faq-group__note {
  margin: 10px 0 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-muted);
}

/* ---------- 三步 ---------- */
.page-faq .faq-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}

.page-faq .faq-step {
  position: relative;
  padding: 22px 22px 24px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--surface-border);
  background: var(--faq-panel);
  box-shadow: var(--shadow-card);
  transition: transform .28s var(--ease), border-color .28s var(--ease), box-shadow .28s var(--ease);
}

.page-faq .faq-step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 26px;
  width: 3px;
  height: 30px;
  border-radius: 0 3px 3px 0;
  background: linear-gradient(180deg, var(--gold), var(--cinnabar));
}

.page-faq .faq-step__idx {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--gold);
  border: 1px solid rgba(230, 169, 60, .45);
  border-radius: var(--radius-pill);
  padding: 3px 10px;
}

.page-faq .faq-step h3 {
  margin: 12px 0 8px;
  font-family: var(--font-body);
  font-size: 18px;
  font-weight: 500;
  line-height: 1.5;
  color: var(--ivory);
}

.page-faq .faq-step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-muted);
}

.page-faq .faq-figure {
  margin: 22px 0 0;
}

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

.page-faq .faq-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-faq .faq-cta--end {
  margin-top: 30px;
  padding-top: 22px;
  border-top: 1px solid var(--surface-border);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-faq .faq-list--tight {
  margin-top: 20px;
}

.page-faq .faq-item {
  border-radius: var(--radius-lg);
  border: 1px solid var(--surface-border);
  background: var(--faq-panel);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: border-color .24s var(--ease), box-shadow .24s var(--ease), transform .24s var(--ease);
}

.page-faq .faq-item__trigger {
  position: relative;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 20px 22px;
  border: 0;
  background: none;
  color: var(--ivory);
  text-align: left;
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 500;
  line-height: 1.6;
  cursor: pointer;
  transition: color .2s var(--ease);
}

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

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

.page-faq .faq-item__mark {
  flex: 0 0 auto;
  position: relative;
  width: 18px;
  height: 18px;
  margin-top: 4px;
  border-radius: 50%;
  border: 1px solid rgba(230, 169, 60, .5);
  transition: background .24s var(--ease), border-color .24s var(--ease);
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 8px;
  height: 1.5px;
  background: var(--gold);
  transform: translate(-50%, -50%);
  transition: transform .24s var(--ease), opacity .24s var(--ease);
}

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

.page-faq .faq-item__trigger[aria-expanded="true"] .faq-item__mark {
  background: rgba(230, 169, 60, .16);
  border-color: var(--gold);
}

.page-faq .faq-item__trigger[aria-expanded="true"] .faq-item__mark::after {
  transform: translate(-50%, -50%) rotate(0deg);
  opacity: 0;
}

.page-faq .faq-item__panel {
  padding: 0 22px 22px;
  border-top: 1px solid var(--surface-border);
}

.page-faq .faq-item__panel p {
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-muted);
}

/* ---------- 研究板 ---------- */
.page-faq .faq-board {
  margin-bottom: 6px;
}

.page-faq .faq-board .card__title {
  margin: 8px 0 10px;
  font-family: var(--font-body);
  font-size: 21px;
  font-weight: 500;
  line-height: 1.5;
  color: var(--ivory);
}

/* ---------- 设备标签页 ---------- */
.page-faq .faq-tabs {
  margin-top: 4px;
}

.page-faq .faq-tabs__bar {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  padding-bottom: 10px;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-tabs__bar .tab {
  flex: 0 0 auto;
  padding: 9px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--surface-border);
  background: var(--surface-2);
  color: var(--silver);
  font-family: var(--font-body);
  font-size: 14px;
  cursor: pointer;
  white-space: nowrap;
  transition: color .2s var(--ease), background .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-tabs__bar .tab:hover,
.page-faq .faq-tabs__bar .tab:focus-visible {
  color: var(--ivory);
  border-color: var(--gold);
}

.page-faq .faq-tabs__bar .tab[aria-selected="true"] {
  color: var(--ink-900);
  background: var(--gold);
  border-color: var(--gold);
}

.page-faq .faq-tabpanel {
  margin-top: 18px;
  padding: 24px 22px 26px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--surface-border);
  background: var(--faq-panel);
}

.page-faq .faq-tabpanel h3 {
  margin: 0 0 10px;
  font-family: var(--font-body);
  font-size: 19px;
  font-weight: 500;
  line-height: 1.5;
  color: var(--ivory);
}

.page-faq .faq-tabpanel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-muted);
}

.page-faq .faq-tabpanel ul {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-faq .faq-tabpanel li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--silver);
}

.page-faq .faq-tabpanel li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 11px;
  width: 7px;
  height: 1.5px;
  border-radius: 2px;
  background: var(--mist);
}

/* ---------- 栏目卡 ---------- */
.page-faq .faq-columns .faq-columns__card {
  padding: 22px;
}

.page-faq .faq-columns .card__title {
  margin: 8px 0 8px;
  font-family: var(--font-body);
  font-size: 18px;
  font-weight: 500;
  line-height: 1.5;
  color: var(--ivory);
}

.page-faq .faq-columns .card__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-muted);
}

.page-faq .faq-columns .card__meta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mist);
}

.page-faq .faq-columns .card--accent .card__title {
  color: var(--ink-900);
}

.page-faq .faq-columns .card--accent .card__text {
  color: rgba(6, 12, 20, .78);
}

.page-faq .faq-columns .card--accent .card__meta {
  color: rgba(6, 12, 20, .62);
}

/* ---------- 焦点可见性 ---------- */
.page-faq a:focus-visible,
.page-faq button:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero {
    padding: 46px 0 72px;
  }

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

  .page-faq .faq-steps > .faq-step:first-child {
    grid-column: 1 / -1;
  }

  .page-faq .faq-group--tinted {
    padding: 36px 32px 40px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
    padding-top: 56px;
    padding-bottom: 84px;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 128px;
    order: 0;
  }

  .page-faq .faq-rail ul {
    flex-direction: column;
    flex-wrap: wrap;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-rail a {
    display: block;
    border-radius: var(--radius-md);
    white-space: normal;
  }

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

  .page-faq .faq-steps > .faq-step:first-child {
    grid-column: auto;
  }

  .page-faq .faq-group {
    scroll-margin-top: 140px;
  }

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

  .page-faq .faq-item__trigger {
    font-size: 18px;
    padding: 22px 26px;
  }

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

  .page-faq .faq-tabpanel {
    padding: 28px 30px 30px;
  }
}

@media (hover: hover) {
  .page-faq .faq-step:hover {
    transform: translateY(-3px);
    border-color: rgba(230, 169, 60, .45);
    box-shadow: var(--shadow-lift);
  }

  .page-faq .faq-item:hover {
    border-color: rgba(230, 169, 60, .38);
    box-shadow: var(--shadow-lift);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-step,
  .page-faq .faq-item,
  .page-faq .faq-item__mark,
  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after,
  .page-faq .faq-rail a,
  .page-faq .faq-tabs__bar .tab {
    transition: none;
  }

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

/* 浅色环境兜底：移动端暖灰底 */
@media (max-width: 719px) {
  .page-faq .faq-group--tinted {
    background:
      linear-gradient(160deg, rgba(62, 124, 107, .08), transparent 46%),
      rgba(255, 255, 255, .5);
  }

  .page-faq .faq-step,
  .page-faq .faq-item,
  .page-faq .faq-tabpanel {
    background: rgba(255, 255, 255, .72);
    border-color: rgba(11, 22, 38, .14);
  }

  .page-faq .faq-step h3,
  .page-faq .faq-item__trigger,
  .page-faq .faq-tabpanel h3,
  .page-faq .faq-columns .card__title,
  .page-faq .faq-board .card__title {
    color: var(--ink-800);
  }

  .page-faq .faq-step p,
  .page-faq .faq-item__panel p,
  .page-faq .faq-tabpanel p,
  .page-faq .faq-tabpanel li,
  .page-faq .faq-columns .card__text,
  .page-faq .faq-group__note {
    color: #4E5A68;
  }

  .page-faq .faq-group__head .section-title {
    color: var(--ink-800);
  }

  .page-faq .faq-rail a {
    background: rgba(255, 255, 255, .72);
    color: #4E5A68;
    border-color: rgba(11, 22, 38, .16);
  }

  .page-faq .faq-tabs__bar .tab {
    background: rgba(255, 255, 255, .72);
    color: #4E5A68;
    border-color: rgba(11, 22, 38, .16);
  }

  .page-faq .faq-item__trigger:focus-visible {
    outline-color: #8A5A0B;
  }
}
</final>