.page-faq {
  --faq-gap: clamp(22px, 3.2vw, 40px);
  --faq-line: rgba(143, 163, 184, .2);
  padding-bottom: clamp(52px, 7vw, 104px);
  background:
    radial-gradient(900px 420px at 90% -10%, rgba(47, 182, 196, .13), transparent 62%),
    radial-gradient(760px 400px at -8% 24%, rgba(232, 178, 76, .08), transparent 60%);
}

/* ---------- 顶部 ---------- */
.page-faq .faq-top {
  padding-top: clamp(22px, 3.6vw, 42px);
}

.page-faq .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--c-stone);
}

.page-faq .crumbs a {
  color: var(--c-lake);
  text-decoration: none;
}

.page-faq .crumbs a:hover,
.page-faq .crumbs a:focus-visible {
  text-decoration: underline;
}

.page-faq .faq-hero {
  display: grid;
  gap: var(--faq-gap);
  margin-top: clamp(18px, 3vw, 32px);
}

.page-faq .faq-hero-main h1 {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.24;
  letter-spacing: .04em;
  color: var(--c-mist);
}

.page-faq .faq-hero-main h1::after {
  content: "";
  display: block;
  width: clamp(72px, 14vw, 132px);
  height: 6px;
  margin-top: 18px;
  background: linear-gradient(90deg, var(--c-gold), var(--c-lake));
  clip-path: polygon(0 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
}

.page-faq .faq-hero-main .lede {
  max-width: 38em;
  margin: 20px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(232, 238, 244, .84);
}

.page-faq .faq-hero-aside {
  position: relative;
  padding: 20px 20px 16px;
  background: var(--c-indigo);
  border: 1px solid var(--line);
  border-radius: var(--r);
  box-shadow: var(--shadow-card);
}

.page-faq .faq-hero-aside::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: linear-gradient(180deg, var(--c-volt), rgba(111, 227, 210, 0));
}

.page-faq .faq-aside-label {
  margin: 0;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--c-lake);
  text-transform: uppercase;
}

.page-faq .faq-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 12px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-facts li {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-faq .faq-facts .stat-num {
  font-size: 26px;
  line-height: 1.2;
  color: var(--c-gold);
}

.page-faq .faq-facts .stat-label {
  font-size: 12px;
  color: var(--c-stone);
}

.page-faq .faq-aside-note {
  margin: 16px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--c-stone);
}

/* ---------- 索引条 ---------- */
.page-faq .faq-index {
  position: sticky;
  top: 0;
  z-index: 18;
  margin-top: clamp(26px, 4vw, 46px);
  background: rgba(6, 14, 24, .88);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-index-inner {
  display: flex;
  align-items: center;
  gap: 6px;
  padding-block: 10px;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-index-label {
  flex: 0 0 auto;
  margin-right: 6px;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--c-stone);
}

.page-faq .faq-index-link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 13px;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  font-size: 13px;
  color: var(--c-stone);
  text-decoration: none;
  white-space: nowrap;
  transition: color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-faq .faq-index-link .mono {
  font-size: 12px;
  color: var(--c-lake);
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible,
.page-faq .faq-index-link.is-active {
  color: var(--c-mist);
  border-color: rgba(47, 182, 196, .6);
  background: rgba(20, 42, 69, .82);
}

/* ---------- 主体 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(38px, 5.5vw, 72px);
  margin-top: clamp(34px, 5vw, 60px);
}

.page-faq .faq-group {
  scroll-margin-top: 96px;
}

.page-faq .faq-group + .faq-group::before {
  content: "";
  display: block;
  height: 1px;
  margin-bottom: clamp(26px, 3.6vw, 44px);
  background: linear-gradient(90deg, var(--line-strong), rgba(143, 163, 184, 0));
}

.page-faq .faq-group-head {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

.page-faq .faq-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 5px 18px 5px 13px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--c-night-deep);
  background: linear-gradient(120deg, var(--c-lake), var(--c-volt));
  clip-path: polygon(0 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
}

.page-faq .section-title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(22px, 2.6vw, 30px);
  line-height: 1.34;
  letter-spacing: .03em;
  color: var(--c-mist);
}

.page-faq .faq-group-desc {
  max-width: 40em;
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-stone);
}

.page-faq .faq-group-desc a,
.page-faq .faq-item .collapse-body a,
.page-faq .faq-level a {
  color: var(--c-lake);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 182, 196, .45);
}

.page-faq .faq-group-desc a:hover,
.page-faq .faq-item .collapse-body a:hover,
.page-faq .faq-level a:hover {
  color: var(--c-volt);
}

/* ---------- 步骤条 ---------- */
.page-faq .faq-steps {
  display: grid;
  gap: 14px;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}

.page-faq .faq-step {
  position: relative;
  padding: 18px 18px 20px;
  background: var(--c-indigo);
  border: 1px solid var(--line);
  border-radius: var(--r);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.page-faq .faq-step::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 2px;
  background: linear-gradient(180deg, var(--c-gold), rgba(232, 178, 76, 0));
}

.page-faq .faq-step-num {
  display: block;
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--c-gold);
}

.page-faq .faq-step h3 {
  margin: 8px 0 6px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: .02em;
  color: var(--c-mist);
}

.page-faq .faq-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-stone);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: clamp(24px, 3.6vw, 38px) 0 0;
  background: var(--c-indigo);
  border: 1px solid var(--line);
  border-radius: var(--r);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

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

.page-faq .faq-figcaption {
  display: block;
  padding: 10px 14px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--c-stone);
  background: rgba(6, 14, 24, .5);
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-figure-pair {
  max-width: 520px;
}

/* ---------- 关卡 ---------- */
.page-faq .faq-levels {
  display: grid;
  gap: 14px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-faq .faq-level {
  padding: 14px 16px;
  background: rgba(20, 42, 69, .55);
  border: 1px solid var(--line-soft);
  border-left: 2px solid var(--c-slate);
  border-radius: var(--r);
}

.page-faq .faq-level-no {
  display: block;
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--c-lake);
}

.page-faq .faq-level h3 {
  margin: 7px 0 5px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: .02em;
  color: var(--c-mist);
}

.page-faq .faq-level p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-stone);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-qa {
  margin-top: clamp(24px, 3.4vw, 36px);
}

.page-faq .faq-qa .collapse-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.page-faq .faq-item {
  margin-top: 10px;
  background: rgba(20, 42, 69, .42);
  border: 1px solid var(--line-soft);
  border-radius: var(--r);
  transition: border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-faq .faq-item:hover {
  border-color: rgba(47, 182, 196, .42);
}

.page-faq .faq-item[open] {
  background: rgba(20, 42, 69, .68);
  border-color: rgba(232, 178, 76, .34);
}

.page-faq .faq-item > summary,
.page-faq .faq-q {
  position: relative;
  padding: 15px 44px 15px 30px;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 15.5px;
  line-height: 1.62;
  letter-spacing: .01em;
  color: var(--c-mist);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item > summary::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 21px;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--c-lake);
  border-bottom: 2px solid var(--c-lake);
  transform: rotate(-45deg);
  transition: transform .2s var(--ease), top .2s var(--ease);
}

.page-faq .faq-item[open] > summary::before {
  top: 18px;
  transform: rotate(45deg);
  border-color: var(--c-gold);
}

.page-faq .faq-item > summary::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 2px;
  background: var(--c-gold);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform .22s var(--ease);
}

.page-faq .faq-item[open] > summary::after {
  transform: scaleY(1);
}

.page-faq .faq-item .collapse-body {
  padding: 0 18px 16px 30px;
}

.page-faq .faq-item .collapse-body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--c-stone);
}

.page-faq .faq-key {
  color: var(--c-mist);
  border-bottom: 1px solid var(--c-gold);
  padding-bottom: 1px;
}

/* ---------- 维度标签 ---------- */
.page-faq .faq-dims {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

/* ---------- 版本表 ---------- */
.page-faq .faq-table-wrap {
  margin-top: clamp(20px, 3vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow-x: auto;
}

.page-faq .faq-table {
  width: 100%;
  min-width: 480px;
  border-collapse: collapse;
}

.page-faq .faq-table-caption {
  padding: 12px 16px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--c-paper);
  text-align: left;
  background: rgba(62, 90, 107, .22);
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-table th,
.page-faq .faq-table td {
  padding: 13px 16px;
  font-size: 14px;
  line-height: 1.6;
  text-align: left;
  color: var(--c-mist);
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-table thead th {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--c-paper);
  background: rgba(62, 90, 107, .28);
}

.page-faq .faq-table tbody tr:last-child td {
  border-bottom: none;
}

.page-faq .faq-table tbody tr.is-active td {
  background: rgba(47, 182, 196, .1);
}

.page-faq .faq-table tbody tr.is-active td:first-child {
  box-shadow: inset 3px 0 0 var(--c-volt);
}

/* ---------- 三步流程 ---------- */
.page-faq .faq-flow {
  display: grid;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-faq .faq-flow-step {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 15px 16px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--r);
  background: rgba(6, 14, 24, .38);
}

.page-faq .faq-flow-no {
  flex: 0 0 auto;
  padding: 3px 8px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--c-night-deep);
  background: var(--c-volt);
  clip-path: polygon(0 0, 100% 0, calc(100% - 6px) 100%, 0 100%);
}

.page-faq .faq-flow-step h3 {
  margin: 0 0 4px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: .02em;
  color: var(--c-mist);
}

.page-faq .faq-flow-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--c-stone);
}

/* ---------- 反馈区 ---------- */
.page-faq .faq-endgrid {
  display: grid;
  gap: 16px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-faq .faq-endcol {
  padding: 18px 18px 20px;
  background: var(--c-indigo);
  border: 1px solid var(--line);
  border-radius: var(--r);
  box-shadow: var(--shadow-card);
}

.page-faq .faq-endcol h3 {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 16px;
  letter-spacing: .03em;
  color: var(--c-mist);
}

.page-faq .faq-list {
  display: grid;
  gap: 8px;
  margin: 10px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-stone);
}

.page-faq .faq-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .76em;
  width: 7px;
  height: 2px;
  background: var(--c-volt);
}

.page-faq .faq-endcol-paper {
  background: var(--c-paper);
  border-color: transparent;
  box-shadow: 6px 6px 0 rgba(47, 182, 196, .26);
}

.page-faq .faq-endcol-paper h3 {
  color: var(--c-night-deep);
}

.page-faq .faq-endcol-paper p {
  margin: 0;
  font-size: 14px;
  line-height: 1.82;
  color: #2c3c4e;
}

.page-faq .faq-endcol-link {
  margin-top: 14px !important;
}

.page-faq .faq-endcol-paper a {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: #0d5f6b;
  text-decoration: none;
  border-bottom: 1px solid rgba(13, 95, 107, .5);
}

.page-faq .faq-endcol-paper a:hover {
  color: #093b43;
}

.page-faq .faq-update {
  margin: clamp(24px, 3.4vw, 34px) 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--c-stone);
}

/* ---------- 断点 ---------- */
@media (min-width: 780px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-faq .faq-levels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 18px;
    padding-bottom: 22px;
  }

  .page-faq .faq-levels > .faq-level:nth-child(even) {
    transform: translateY(22px);
  }

  .page-faq .faq-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }

  .page-faq .faq-flow-step {
    flex-direction: column;
    gap: 10px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
    gap: clamp(26px, 4vw, 48px);
  }

  .page-faq .faq-hero-aside {
    margin-top: 44px;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-endgrid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
    gap: 22px;
  }

  .page-faq .faq-endcol-paper {
    margin-top: 26px;
  }
}

@media (min-width: 1100px) {
  .page-faq .faq-steps {
    gap: 22px;
  }

  .page-faq .faq-item > summary {
    padding-right: 56px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-levels > .faq-level:nth-child(even) {
    transform: none;
  }

  .page-faq .faq-item > summary::before,
  .page-faq .faq-item > summary::after,
  .page-faq .faq-index-link {
    transition: none;
  }
}