.page-faq {
  --faq-cut: 14px;
  position: relative;
  background: var(--c-deep);
  color: var(--c-cream);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: calc(var(--header-h) + clamp(44px, 8vw, 92px)) 0 clamp(40px, 6vw, 68px);
  background-image:
    repeating-linear-gradient(0deg, rgba(237, 232, 220, .026) 0 1px, transparent 1px 4px),
    radial-gradient(120% 90% at 88% -12%, rgba(31, 242, 208, .17), transparent 56%),
    radial-gradient(90% 80% at 2% 108%, rgba(255, 107, 74, .13), transparent 60%);
  background-color: var(--c-deep);
  border-bottom: 1px solid var(--c-line);
}

.page-faq .faq-hero__eyebrow {
  margin: clamp(22px, 3vw, 34px) 0 10px;
  color: var(--c-yellow);
}

.page-faq .faq-hero__title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5.4vw, 4rem);
  line-height: 1.06;
  letter-spacing: -.03em;
  color: var(--c-cream);
}

.page-faq .faq-hero__lede {
  max-width: 620px;
  margin: 0;
  font-size: clamp(.95rem, 1.4vw, 1.06rem);
  line-height: 1.85;
  color: rgba(237, 232, 220, .78);
}

/* 三层索引示意 */
.page-faq .index-viz {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin: clamp(30px, 4.4vw, 48px) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .index-viz__step {
  position: relative;
  display: grid;
  gap: 4px;
  padding: 16px 20px 18px;
  background: linear-gradient(158deg, rgba(14, 42, 69, .96), rgba(8, 24, 38, .96));
  clip-path: polygon(0 0, calc(100% - var(--faq-cut)) 0, 100% var(--faq-cut), 100% 100%, var(--faq-cut) 100%, 0 calc(100% - var(--faq-cut)));
}

.page-faq .index-viz__label {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .2em;
  color: var(--c-rock);
}

.page-faq .index-viz__value {
  font-family: var(--font-mono);
  font-size: clamp(1.7rem, 3.6vw, 2.5rem);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--c-cyan);
}

.page-faq .index-viz__value i {
  font-style: normal;
  font-size: .5em;
  color: var(--c-coral);
  padding: 0 .06em;
}

.page-faq .index-viz__note {
  font-size: 12.5px;
  line-height: 1.6;
  color: rgba(237, 232, 220, .6);
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-body {
  padding: clamp(40px, 6vw, 76px) 0 clamp(56px, 8vw, 100px);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 3.4vw, 48px);
  align-items: start;
}

/* 左侧分类标签 */
.page-faq .faq-toc {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
}

.page-faq .faq-toc__label {
  margin: 0;
  color: var(--c-rock);
}

.page-faq .faq-toc__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

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

.page-faq .faq-toc__link {
  display: block;
  white-space: nowrap;
  padding: 9px 14px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--c-rock);
  text-decoration: none;
  background: rgba(14, 42, 69, .55);
  border-left: 2px solid var(--c-line);
  transition: color .22s var(--ease), border-color .22s var(--ease), background-color .22s var(--ease);
}

.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  color: var(--c-cream);
  border-left-color: var(--c-yellow);
  background: rgba(14, 42, 69, .95);
}

/* 右侧问答流 */
.page-faq .faq-stream {
  display: flex;
  flex-direction: column;
  gap: clamp(38px, 5vw, 66px);
  min-width: 0;
}

.page-faq .faq-section {
  scroll-margin-top: calc(var(--header-h) + 28px);
}

.page-faq .faq-section__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--c-line);
}

.page-faq .faq-section__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--c-yellow);
}

.page-faq .faq-section__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.6vw, 1.85rem);
  letter-spacing: -.02em;
  color: var(--c-cream);
}

/* 折叠问答面板 */
.page-faq .faq-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 0;
  padding: 0;
}

.page-faq .faq-item {
  position: relative;
  background: linear-gradient(160deg, rgba(14, 42, 69, .95), rgba(8, 24, 38, .95));
  clip-path: polygon(0 0, calc(100% - var(--faq-cut)) 0, 100% var(--faq-cut), 100% 100%, var(--faq-cut) 100%, 0 calc(100% - var(--faq-cut)));
  overflow: hidden;
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 2px;
  background: var(--c-line);
  transition: background-color .28s var(--ease), box-shadow .28s var(--ease);
  pointer-events: none;
}

.page-faq .faq-item[open]::before {
  background: var(--c-cyan);
  box-shadow: 0 0 14px rgba(31, 242, 208, .55);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 20px 16px 22px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 15px;
  line-height: 1.55;
  color: var(--c-cream);
  transition: color .22s var(--ease);
}

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

.page-faq .faq-item__q::marker {
  content: "";
}

.page-faq .faq-item__q:hover {
  color: var(--c-cyan);
}

.page-faq .faq-item__idx {
  flex: 0 0 auto;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--c-rock);
  transition: color .22s var(--ease);
}

.page-faq .faq-item[open] .faq-item__idx {
  color: var(--c-cyan);
}

.page-faq .faq-item__text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-item__mark {
  position: relative;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  margin-top: 4px;
  margin-left: auto;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--c-cyan);
  transition: transform .28s var(--ease), opacity .28s var(--ease);
}

.page-faq .faq-item__mark::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}

.page-faq .faq-item__mark::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: rotate(90deg);
  opacity: 0;
}

.page-faq .faq-item__a {
  display: grid;
  gap: 10px;
  padding: 0 22px 20px;
}

.page-faq .faq-item__lead {
  margin: 0;
  font-size: 14.5px;
  font-weight: 500;
  line-height: 1.75;
  color: var(--c-cream);
}

.page-faq .faq-item__a p:not(.faq-item__lead) {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.85;
  color: rgba(237, 232, 220, .7);
}

.page-faq .faq-item__link {
  justify-self: start;
  margin-top: 2px;
  font-size: 13px;
  font-weight: 500;
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(31, 242, 208, .35);
  padding-bottom: 2px;
  transition: border-color .22s var(--ease), color .22s var(--ease);
}

.page-faq .faq-item__link:hover,
.page-faq .faq-item__link:focus-visible {
  color: var(--c-yellow);
  border-bottom-color: var(--c-yellow);
}

/* 定位与索引的双栏 */
.page-faq .faq-index-cols {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  align-items: start;
}

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

/* ---------- 收尾 ---------- */
.page-faq .faq-close {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-top: 1px solid var(--c-line);
  background: var(--c-deep-2);
}

.page-faq .faq-close__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.page-faq .faq-close__bg img {
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  opacity: .3;
}

.page-faq .faq-close::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(120deg, rgba(8, 24, 38, .96) 0%, rgba(8, 24, 38, .74) 52%, rgba(196, 121, 79, .3) 100%);
}

.page-faq .faq-close__inner {
  position: relative;
  padding: clamp(48px, 8vw, 96px) var(--gutter);
}

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

.page-faq .faq-close__title {
  margin: 0 0 14px;
  max-width: 18ch;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.6vw, 2.6rem);
  line-height: 1.14;
  letter-spacing: -.025em;
  color: var(--c-cream);
}

.page-faq .faq-close__text {
  max-width: 620px;
  margin: 0 0 26px;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(237, 232, 220, .76);
}

.page-faq .faq-close .chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .index-viz {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-index-cols {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 22px;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 60px);
  }

  .page-faq .faq-toc {
    position: sticky;
    top: calc(var(--header-h) + 26px);
    gap: 12px;
  }

  .page-faq .faq-toc__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-toc__link {
    font-size: 14px;
    padding: 11px 16px;
  }

  .page-faq .index-viz__step {
    padding: 20px 24px 22px;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-index-cols {
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after,
  .page-faq .faq-item__q,
  .page-faq .faq-item__idx,
  .page-faq .faq-toc__link,
  .page-faq .faq-item::before,
  .page-faq .faq-item__link {
    transition: none;
  }
}