.page-faq {
  --faq-idx: 236px;
  --faq-col-gap: clamp(28px, 4vw, 64px);
  --faq-anchor: calc(var(--header-row) + 28px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-top: clamp(20px, 4vw, 44px);
}

.page-faq .faq-hero h1 {
  margin: 16px 0 0;
  max-width: 17em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 5.2vw, 52px);
  line-height: 1.14;
  letter-spacing: -0.015em;
  color: var(--white);
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 60ch;
  color: var(--muted);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 30px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  color: var(--muted);
  font-size: 13px;
}

.page-faq .faq-hero__meta li {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding-left: 15px;
}

.page-faq .faq-hero__meta li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 7px;
  height: 1px;
  background: var(--orange);
}

.page-faq .faq-hero__meta .mono {
  color: var(--white);
  font-size: 15px;
  letter-spacing: 0.02em;
}

.page-faq .faq-hero__banner {
  position: relative;
  margin: clamp(26px, 4.5vw, 52px) 0 0;
  border-top: 1px solid var(--grid);
  border-bottom: 1px solid var(--grid);
  background: var(--panel-deep);
  overflow: hidden;
}

.page-faq .faq-hero__banner img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: clamp(170px, 25vw, 320px);
  object-fit: cover;
  filter: saturate(0.72) contrast(1.06) brightness(0.78);
}

.page-faq .faq-hero__banner::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(5, 7, 15, 0) 42%, rgba(5, 7, 15, 0.6) 100%);
}

/* ---------- 双列骨架 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-col-gap);
  padding-block: clamp(34px, 5.5vw, 76px) clamp(44px, 6.5vw, 92px);
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-index {
  padding-top: 16px;
  border-top: 1px solid var(--grid);
}

.page-faq .faq-index__head {
  margin: 0 0 14px;
  color: var(--muted);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 2px 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

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

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 13px;
  border: 1px solid var(--grid);
  color: var(--muted);
  font-size: 13px;
  line-height: 1.4;
  white-space: nowrap;
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--white);
  border-color: var(--orange);
  outline: none;
}

.page-faq .faq-index__num {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-faq .faq-index__foot {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--grid-soft);
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.9;
}

.page-faq .faq-index__foot a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s var(--ease);
}

.page-faq .faq-index__foot a:hover {
  border-bottom-color: var(--blue);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-groups {
  display: flex;
  flex-direction: column;
  gap: clamp(38px, 5vw, 68px);
  min-width: 0;
}

.page-faq .faq-group {
  min-width: 0;
  scroll-margin-top: var(--faq-anchor);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--grid);
}

.page-faq .faq-group__num {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
  transition: color 0.3s var(--ease);
}

.page-faq .faq-group[data-active="true"] .faq-group__num {
  color: var(--orange);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.4vw, 26px);
  line-height: 1.32;
  letter-spacing: -0.005em;
  color: var(--white);
}

.page-faq .faq-group__note {
  margin: 16px 0 0;
  max-width: 66ch;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.88;
}

/* ---------- 折叠条目 ---------- */
.page-faq .faq-item-list {
  margin-top: 18px;
  border-top: 1px solid var(--grid-soft);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--grid-soft);
}

.page-faq .faq-item > summary {
  list-style: none;
}

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

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px 2px;
  cursor: pointer;
  color: var(--white);
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.65;
  transition: color 0.2s var(--ease);
}

.page-faq .faq-item__q:hover,
.page-faq .faq-item__q:focus-visible {
  color: var(--orange-soft);
  outline: none;
}

.page-faq .faq-item__q::after {
  content: "";
  flex: 0 0 auto;
  margin-left: auto;
  margin-top: 8px;
  width: 8px;
  height: 8px;
  border-right: 1.5px solid var(--muted);
  border-bottom: 1.5px solid var(--muted);
  transform: rotate(45deg);
  transform-origin: 50% 50%;
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-faq .faq-item[open] > .faq-item__q::after {
  transform: rotate(-135deg);
  border-color: var(--orange);
}

.page-faq .faq-item__a {
  max-width: 66ch;
  padding: 0 34px 20px 2px;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.9;
}

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

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

.page-faq .faq-item__a a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(61, 123, 255, 0.45);
  transition: border-color 0.2s var(--ease);
}

.page-faq .faq-item__a a:hover {
  border-bottom-color: var(--blue);
}

.page-faq .faq-item[open] > .faq-item__a {
  animation: faq-open 0.28s var(--ease) both;
}

@keyframes faq-open {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 纠错流程图 ---------- */
.page-faq .faq-flow-figure {
  margin: 26px 0 0;
  border: 1px solid var(--grid);
  background: var(--panel-deep);
}

.page-faq .faq-flow-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  filter: saturate(0.85) brightness(0.9);
}

.page-faq .faq-flow-figure__cap {
  padding: 14px 16px;
  border-top: 1px solid var(--grid);
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.8;
}

/* ---------- 收束区 ---------- */
.page-faq .faq-cta {
  border-top: 1px solid var(--grid);
  background: var(--panel-deep);
}

.page-faq .faq-cta__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  padding-block: clamp(34px, 5vw, 62px);
}

.page-faq .faq-cta__copy > .label {
  margin: 0;
}

.page-faq .faq-cta__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 3vw, 31px);
  line-height: 1.26;
  color: var(--white);
}

.page-faq .faq-cta__copy > p:not(.label) {
  margin: 12px 0 0;
  max-width: 58ch;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.85;
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 桌面布局 ---------- */
@media (min-width: 960px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-idx) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: var(--faq-anchor);
    border-top: 0;
    padding-top: 0;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 0;
    padding: 0;
    overflow: visible;
  }

  .page-faq .faq-index__link {
    border: 0;
    border-left: 2px solid var(--grid);
    padding: 11px 14px;
    white-space: normal;
    font-size: 13.5px;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    border-left-color: var(--orange);
    background: rgba(255, 106, 26, 0.06);
  }

  .page-faq .faq-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 44px;
  }
}

@media (min-width: 1280px) {
  .page-faq .faq-item__a {
    padding-right: 56px;
  }
}

/* ---------- 窄屏收敛 ---------- */
@media (max-width: 600px) {
  .page-faq .faq-item__q {
    gap: 12px;
    font-size: 15px;
    padding: 14px 2px;
  }

  .page-faq .faq-item__q::after {
    margin-top: 7px;
  }

  .page-faq .faq-item__a {
    padding: 0 12px 18px 2px;
    font-size: 14px;
  }

  .page-faq .faq-group__head {
    gap: 10px;
  }

  .page-faq .faq-hero__meta {
    gap: 8px 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item[open] > .faq-item__a {
    animation: none;
  }

  .page-faq .faq-index__link,
  .page-faq .faq-item__q,
  .page-faq .faq-item__q::after,
  .page-faq .faq-group__num {
    transition: none;
  }
}