.page-faq {
  --faq-paper-edge: rgba(6, 23, 38, 0.14);
  display: block;
  background:
    radial-gradient(120% 62% at 88% 0%, rgba(14, 47, 74, 0.88) 0%, rgba(6, 23, 38, 0) 58%),
    linear-gradient(180deg, var(--ink-deep) 0%, var(--ink) 28%, var(--ink) 100%);
}

/* 顶部横幅 */
.page-faq .faq-banner {
  position: relative;
  display: grid;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-banner-img {
  grid-area: 1 / 1;
  display: block;
  width: 100%;
  height: clamp(230px, 38vw, 420px);
  object-fit: cover;
  opacity: 0.55;
}

.page-faq .faq-banner::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 80%;
  background: linear-gradient(to top, var(--ink) 26%, rgba(6, 23, 38, 0.08) 100%);
  pointer-events: none;
}

.page-faq .faq-banner-inner {
  grid-area: 1 / 1;
  align-self: end;
  position: relative;
  z-index: 1;
  padding-block: 0 34px;
}

.page-faq .faq-banner .eyebrow {
  margin: 12px 0 8px;
  color: var(--cyan);
}

.page-faq .faq-banner .display {
  margin: 0 0 12px;
  max-width: 18ch;
  color: var(--white);
}

.page-faq .faq-banner .lead {
  margin: 0;
  max-width: 58ch;
  color: var(--mist);
  font-size: 16px;
  line-height: 1.8;
}

/* 双栏骨架 */
.page-faq .faq-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  align-items: start;
  padding-block: 34px 76px;
}

/* 左侧问题索引 */
.page-faq .faq-index {
  border: 1px solid var(--line);
  border-radius: var(--r-m);
  padding: 14px;
  background: rgba(14, 47, 74, 0.42);
}

.page-faq .faq-index-title {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
}

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

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

.page-faq .faq-index-link {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 9px 12px;
  border-left: 3px solid transparent;
  border-radius: var(--r-s);
  color: var(--mist);
  font-size: 14px;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-index-link:hover {
  color: var(--white);
  background: rgba(34, 224, 214, 0.08);
}

.page-faq .faq-index-link[data-active="true"] {
  color: var(--white);
  background: rgba(34, 224, 214, 0.13);
  border-left-color: var(--cyan);
}

.page-faq .faq-idx {
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}

/* 筛选工具条 */
.page-faq .faq-tools {
  margin-bottom: 34px;
}

.page-faq .faq-tools .eyebrow {
  margin: 0 0 10px;
  color: var(--mist);
}

.page-faq .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .filter-btn {
  appearance: none;
  font: inherit;
  font-size: 13px;
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--mist);
  cursor: pointer;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-faq .filter-btn:hover {
  color: var(--white);
  border-color: var(--line-strong);
}

.page-faq .filter-btn[aria-pressed="true"] {
  background: var(--orange);
  border-color: var(--orange);
  color: #23100a;
  font-weight: 700;
}

.page-faq .faq-hint {
  margin: 14px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-hint a {
  color: var(--cyan);
}

/* 分组 */
.page-faq .faq-group {
  margin-bottom: 46px;
  scroll-margin-top: 24px;
}

.page-faq .faq-group-head {
  border-top: 1px solid var(--line);
  padding-top: 16px;
  margin-bottom: 18px;
}

.page-faq .faq-group-head .eyebrow {
  margin: 0 0 6px;
  color: var(--cyan);
}

.page-faq .faq-group-head h2 {
  margin: 0 0 8px;
  font-size: var(--fs-h2);
  line-height: 1.2;
  color: var(--white);
}

.page-faq .faq-group-desc {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .faq-group-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

/* 暖纸答案卡 */
.page-faq .faq-item {
  background: var(--paper);
  border: 1px solid var(--faq-paper-edge);
  border-radius: var(--r-m);
  margin-bottom: 10px;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.page-faq .faq-q {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--ink);
  transition: color 0.2s var(--ease);
}

.page-faq .faq-q::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item[open] .faq-q {
  color: var(--deep);
}

.page-faq .faq-more {
  position: relative;
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  margin-top: 5px;
}

.page-faq .faq-more::before,
.page-faq .faq-more::after {
  content: "";
  position: absolute;
  background: var(--orange);
  border-radius: 2px;
}

.page-faq .faq-more::before {
  inset: 7px 0 auto 0;
  height: 2px;
}

.page-faq .faq-more::after {
  inset: 0 auto 0 7px;
  width: 2px;
  transition: transform 0.22s var(--ease);
}

.page-faq .faq-item[open] .faq-more::after {
  transform: scaleY(0);
}

.page-faq .faq-a {
  padding: 0 18px 16px;
  border-top: 1px solid rgba(6, 23, 38, 0.12);
}

.page-faq .faq-a p {
  margin: 12px 0 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate);
}

.page-faq .faq-a a {
  color: var(--deep);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: var(--orange);
  text-underline-offset: 3px;
}

.page-faq .faq-a a:hover {
  text-decoration-color: var(--cyan);
}

/* 主客场对比示意 */
.page-faq .faq-meter {
  display: grid;
  gap: 7px;
  margin-top: 14px;
}

.page-faq .faq-meter-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-faq .faq-meter-key {
  flex: 0 0 auto;
  width: 34px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.page-faq .faq-meter-track {
  flex: 1 1 auto;
  height: 6px;
  border-radius: 999px;
  background: rgba(6, 23, 38, 0.1);
  overflow: hidden;
}

.page-faq .faq-meter-track i {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
}

/* 侧栏图卡 */
.page-faq .faq-aside {
  border: 1px solid var(--line);
  border-radius: var(--r-m);
  padding: 12px;
  background: rgba(14, 47, 74, 0.5);
}

.page-faq .faq-aside img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--r-s);
  object-fit: cover;
}

.page-faq .faq-aside-cap {
  margin: 10px 2px 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist);
}

/* 桌面端 */
@media (min-width: 960px) {
  .page-faq .faq-shell {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 44px;
    padding-block: 52px 96px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 24px;
  }

  .page-faq .faq-index-list {
    flex-direction: column;
    gap: 4px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index-list li {
    flex: 1 1 auto;
  }

  .page-faq .faq-index-link {
    white-space: normal;
  }

  .page-faq .faq-group-body.has-aside {
    grid-template-columns: minmax(0, 1fr) 252px;
    gap: 24px;
  }

  .page-faq .faq-banner-inner {
    padding-block: 0 46px;
  }
}

@media (min-width: 1220px) {
  .page-faq .faq-shell {
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 52px;
  }

  .page-faq .faq-a p {
    font-size: 15.5px;
  }
}