.page-faq {
  --faq-rail: 228px;
  --faq-line: rgba(14, 58, 90, .9);
  --faq-panel: linear-gradient(165deg, rgba(8, 36, 58, .92), rgba(4, 17, 31, .96));
  --faq-soft: rgba(244, 241, 234, .78);
  background: var(--c-ink-900);
  color: var(--c-paper);
  font-family: var(--font-body);
  line-height: 1.72;
  padding-bottom: clamp(40px, 6vw, 76px);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumbs {
  padding: 22px 0 8px;
}

.page-faq .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
}

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

.page-faq .breadcrumbs a:hover {
  color: var(--c-gold-300);
}

.page-faq .breadcrumbs li[aria-current] {
  color: var(--c-gold-500);
}

.page-faq .breadcrumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--c-ink-700);
}

/* ---------- 首屏框景 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(18px, 3vw, 32px) 0 clamp(24px, 4vw, 40px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(640px 320px at 8% 0%, rgba(55, 242, 214, .10), transparent 62%),
    radial-gradient(740px 380px at 94% 22%, rgba(215, 168, 74, .13), transparent 66%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  display: grid;
  gap: clamp(18px, 2.6vw, 28px);
}

.page-faq .faq-hero__frame {
  position: relative;
  padding: clamp(24px, 4vw, 46px) clamp(20px, 3.4vw, 44px) clamp(26px, 4vw, 42px);
  background: var(--faq-panel);
  border: 1px solid var(--faq-line);
  clip-path: var(--clip-corner);
}

.page-faq .faq-hero__frame::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: min(300px, 64%);
  height: 2px;
  background: linear-gradient(90deg, var(--c-gold-500), rgba(215, 168, 74, 0));
}

.page-faq .faq-hero__frame::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 2px;
  height: 118px;
  background: linear-gradient(180deg, rgba(55, 242, 214, 0), var(--c-neon-400));
}

.page-faq .faq-hero h1 {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(38px, 7.4vw, 66px);
  line-height: 1.04;
  letter-spacing: -.01em;
  color: var(--c-paper);
}

.page-faq .faq-hero__lead {
  max-width: 62ch;
  margin: 18px 0 0;
  font-size: 16.5px;
  color: rgba(244, 241, 234, .84);
}

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

/* ---------- 首屏数据条 ---------- */
.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--faq-line);
  border: 1px solid var(--faq-line);
  clip-path: var(--clip-corner);
}

.page-faq .faq-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px 20px;
  background: var(--c-ink-900);
}

.page-faq .faq-stat__num {
  font-size: clamp(24px, 3.4vw, 32px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--c-gold-300);
}

.page-faq .faq-stat__num em {
  font-style: normal;
  margin-left: 2px;
  font-size: .55em;
  color: var(--c-neon-400);
}

.page-faq .faq-stat__plus {
  margin-left: 2px;
  font-size: .68em;
  color: var(--c-neon-400);
}

.page-faq .faq-stat__label {
  font-size: 13.5px;
  color: var(--c-mist);
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.2vw, 40px);
  align-items: start;
}

.page-faq .faq-rail__title {
  margin: 0 0 10px;
  font-size: 11.5px;
  letter-spacing: .22em;
  color: var(--c-mist);
}

.page-faq .faq-rail .index-track {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-left: 0;
  border-left: 1px solid var(--faq-line);
}

.page-faq .faq-rail .index-track a {
  display: flex;
  gap: 10px;
  align-items: baseline;
  margin-left: -1px;
  padding: 10px 14px 10px 16px;
  border-left: 2px solid transparent;
  color: var(--c-mist);
  font-size: 14.5px;
  text-decoration: none;
  transition: color .22s ease, border-color .22s ease, background .22s ease;
}

.page-faq .faq-rail .index-track a .mono {
  font-size: 12px;
  color: var(--c-gold-500);
}

.page-faq .faq-rail .index-track a:hover {
  color: var(--c-paper);
  border-left-color: var(--c-gold-500);
}

.page-faq .faq-rail .index-track a[aria-current="true"] {
  color: var(--c-paper);
  border-left-color: var(--c-neon-400);
  background: linear-gradient(90deg, rgba(55, 242, 214, .12), rgba(55, 242, 214, 0) 78%);
}

.page-faq .faq-rail .index-track a[aria-current="true"] .mono {
  color: var(--c-neon-400);
}

.page-faq .faq-stream {
  display: block;
  min-width: 0;
}

.page-faq .faq-stream .section {
  padding-top: clamp(34px, 5vw, 56px);
  scroll-margin-top: 112px;
}

.page-faq .faq-stream .section:first-child {
  padding-top: 0;
}

.page-faq .faq-stream .section__title {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1.22;
  color: var(--c-paper);
}

.page-faq .faq-stream .section__lead {
  max-width: 68ch;
  margin: 12px 0 0;
  font-size: 16px;
  color: var(--faq-soft);
}

/* ---------- 图片框 ---------- */
.page-faq .media-frame {
  position: relative;
  margin: clamp(20px, 3vw, 30px) 0 0;
  overflow: hidden;
  background: var(--c-ink-800);
  border: 1px solid var(--faq-line);
  clip-path: var(--clip-corner-sm);
}

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

.page-faq .media-frame__cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 10px 16px;
  font-size: 13px;
  color: var(--c-paper);
  background: linear-gradient(0deg, rgba(4, 17, 31, .94), rgba(4, 17, 31, 0));
}

/* ---------- 分类卡 ---------- */
.page-faq .faq-cats {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: clamp(20px, 3vw, 28px);
}

.page-faq .faq-cat {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 20px 18px;
  background: var(--faq-panel);
  border: 1px solid var(--faq-line);
  clip-path: var(--clip-corner-sm);
  transition: transform .3s ease, border-color .3s ease;
}

.page-faq .faq-cat::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 34px;
  height: 2px;
  background: var(--c-gold-500);
}

.page-faq .faq-cat:hover {
  transform: translateY(-4px);
  border-color: var(--c-gold-500);
}

.page-faq .faq-cat__num {
  margin: 0;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--c-neon-400);
}

.page-faq .faq-cat__title {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 800;
  color: var(--c-paper);
}

.page-faq .faq-cat__text {
  flex: 1;
  margin: 10px 0 0;
  font-size: 14.5px;
  color: var(--faq-soft);
}

.page-faq .faq-cat__tag {
  align-self: flex-start;
  margin-top: 16px;
}

/* ---------- 设置路径 ---------- */
.page-faq .faq-path {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-step {
  position: relative;
  padding: 22px 20px 24px;
  background: rgba(8, 36, 58, .66);
  border: 1px solid var(--faq-line);
  border-top: 2px solid var(--c-gold-500);
  clip-path: var(--clip-corner-sm);
}

.page-faq .faq-step__num {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--c-neon-400);
}

.page-faq .faq-step__title {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 700;
  color: var(--c-paper);
}

.page-faq .faq-step p {
  margin: 10px 0 0;
  font-size: 14.8px;
  color: var(--faq-soft);
}

.page-faq .faq-note {
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  padding: 16px 18px;
  font-size: 14.6px;
  color: rgba(244, 241, 234, .82);
  background: rgba(8, 36, 58, .5);
  border-left: 2px solid var(--c-gold-500);
}

.page-faq .faq-note a {
  color: var(--c-gold-300);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 安全与设备 ---------- */
.page-faq .faq-duo {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: clamp(20px, 3vw, 28px);
}

.page-faq .faq-duo__item {
  padding: 24px 22px;
  background: var(--faq-panel);
  border: 1px solid var(--faq-line);
  clip-path: var(--clip-corner-sm);
}

.page-faq .faq-duo__num {
  margin: 0;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--c-gold-500);
}

.page-faq .faq-duo__item h3 {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-size: 21px;
  font-weight: 800;
  color: var(--c-paper);
}

.page-faq .faq-list {
  display: grid;
  gap: 11px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14.8px;
  color: var(--faq-soft);
}

.page-faq .faq-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 7px;
  height: 7px;
  background: var(--c-neon-400);
  transform: rotate(45deg);
}

/* ---------- 反馈与状态 ---------- */
.page-faq .faq-flows {
  margin-top: clamp(20px, 3vw, 28px);
  padding: clamp(20px, 3vw, 28px);
  background: rgba(8, 36, 58, .5);
  border: 1px solid var(--faq-line);
  clip-path: var(--clip-corner);
}

.page-faq .faq-flows__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .faq-states {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-state {
  padding: 18px 18px 18px 20px;
  background: rgba(4, 17, 31, .72);
  border: 1px solid var(--faq-line);
  border-left: 2px solid var(--c-ink-700);
}

.page-faq .faq-state--done {
  border-left-color: var(--c-gold-500);
}

.page-faq .faq-state--active {
  border-left-color: var(--c-neon-400);
}

.page-faq .faq-state__label {
  margin: 0;
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--c-paper);
}

.page-faq .faq-state__text {
  margin: 8px 0 0;
  font-size: 14px;
  color: rgba(244, 241, 234, .72);
}

.page-faq .faq-flows__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 26px;
  margin-top: 26px;
  padding-top: 22px;
  border-top: 1px dashed var(--faq-line);
}

.page-faq .faq-flows__figure {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  margin: 0;
}

.page-faq .faq-flows__figure div {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-faq .faq-flows__figure b {
  font-family: var(--font-mono);
  font-size: 21px;
  font-weight: 700;
  color: var(--c-gold-300);
}

.page-faq .faq-flows__figure span {
  font-size: 13px;
  color: var(--c-mist);
}

/* ---------- 常见问题折叠 ---------- */
.page-faq .faq-qas {
  margin-top: clamp(20px, 3vw, 28px);
  border-top: 1px solid var(--faq-line);
}

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

.page-faq .faq-qa > summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px 4px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-size: clamp(16px, 2vw, 18.5px);
  font-weight: 700;
  color: var(--c-paper);
  transition: color .2s ease;
}

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

.page-faq .faq-qa > summary::after {
  content: "+";
  flex: 0 0 auto;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.4;
  color: var(--c-gold-500);
}

.page-faq .faq-qa[open] > summary {
  color: var(--c-gold-300);
}

.page-faq .faq-qa[open] > summary::after {
  content: "–";
  color: var(--c-neon-400);
}

.page-faq .faq-qa__body {
  padding: 0 4px 20px;
}

.page-faq .faq-qa__body p {
  max-width: 76ch;
  margin: 0;
  font-size: 15px;
  color: var(--faq-soft);
}

/* ---------- 更新时间与版本 ---------- */
.page-faq .faq-version {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  margin-top: clamp(20px, 3vw, 28px);
}

.page-faq .faq-version__list {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--faq-line);
  border: 1px solid var(--faq-line);
  clip-path: var(--clip-corner-sm);
}

.page-faq .faq-version__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 14px 16px;
  background: var(--c-ink-900);
  font-size: 14.6px;
  color: rgba(244, 241, 234, .82);
}

.page-faq .faq-version__list .mono {
  min-width: 72px;
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--c-gold-300);
}

.page-faq .faq-version__aside {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 22px 20px;
  background: var(--faq-panel);
  border: 1px solid var(--faq-line);
  clip-path: var(--clip-corner-sm);
}

.page-faq .faq-stamp {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-size: 13px;
  color: var(--c-mist);
}

.page-faq .faq-stamp::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-neon-400);
  box-shadow: 0 0 0 4px rgba(55, 242, 214, .16);
  animation: faq-pulse 2.4s ease-in-out infinite;
}

.page-faq .faq-version__text {
  margin: 0;
  font-size: 14.6px;
  color: var(--faq-soft);
}

.page-faq .faq-version__aside .btn {
  align-self: flex-start;
}

@keyframes faq-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .35; }
}

/* ---------- 平板 ---------- */
@media (min-width: 620px) {
  .page-faq .faq-cats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-faq .faq-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-path {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }

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

@media (min-width: 820px) {
  .page-faq .faq-duo {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-faq .faq-version {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  }
}

/* ---------- 桌面：左轨 + 右流 ---------- */
@media (min-width: 1001px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 118px;
  }
}

/* ---------- 窄屏：索引轨道横向滚动 ---------- */
@media (max-width: 1000px) {
  .page-faq .faq-rail .index-track {
    flex-direction: row;
    gap: 6px;
    overflow-x: auto;
    padding: 10px 0 12px;
    border-left: none;
    border-top: 1px solid var(--faq-line);
    border-bottom: 1px solid var(--faq-line);
    scrollbar-width: none;
  }

  .page-faq .faq-rail .index-track::-webkit-scrollbar {
    display: none;
  }

  .page-faq .faq-rail .index-track a {
    flex: 0 0 auto;
    margin-left: 0;
    padding: 8px 14px;
    border-left: none;
    border-top: 2px solid transparent;
    background: rgba(8, 36, 58, .6);
    white-space: nowrap;
  }

  .page-faq .faq-rail .index-track a:hover {
    border-left: none;
    border-top-color: var(--c-gold-500);
  }

  .page-faq .faq-rail .index-track a[aria-current="true"] {
    border-left: none;
    border-top-color: var(--c-neon-400);
    background: rgba(55, 242, 214, .1);
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-cats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-cat,
  .page-faq .faq-rail .index-track a,
  .page-faq .faq-qa > summary {
    transition: none;
  }

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

  .page-faq .faq-stamp::before {
    animation: none;
  }
}