.page-faq {
  --faq-rail-w: 300px;
  --faq-gap: 44px;
  --faq-glow: 0 0 0 1px rgba(75, 227, 164, .16), 0 18px 42px -28px rgba(0, 0, 0, .85);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--ds-header-h) + 52px) 0 60px;
  border-bottom: 1px solid var(--ds-line);
  background: var(--ds-ink);
}

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

.page-faq .faq-hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 62% 40%;
  opacity: .3;
}

.page-faq .faq-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(8, 23, 15, .5) 0%, rgba(8, 23, 15, .9) 58%, var(--ds-ink) 100%),
    linear-gradient(96deg, var(--ds-ink) 8%, rgba(8, 23, 15, .18) 78%);
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__title {
  margin: 18px 0 0;
  max-width: 16ch;
  font-size: clamp(30px, 5.4vw, 62px);
  line-height: 1.08;
  letter-spacing: -.025em;
  font-weight: 900;
  color: var(--ds-text);
}

.page-faq .faq-hero__lead {
  margin: 22px 0 0;
  max-width: 62ch;
  color: var(--ds-muted);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 26px;
}

/* ---------- 分屏骨架 ---------- */
.page-faq .faq-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  padding: 44px 0 72px;
}

/* ---------- 左栏索引 ---------- */
.page-faq .faq-rail__label {
  margin: 0 0 14px;
  color: var(--ds-muted);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 4px;
}

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

.page-faq .faq-rail__link {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 9px 14px;
  border-radius: var(--ds-radius);
  border: 1px solid transparent;
  background: var(--ds-panel);
  color: var(--ds-muted);
  font-size: 14px;
  line-height: 1.35;
  text-decoration: none;
  white-space: nowrap;
  transition: color .2s var(--ds-ease), border-color .2s var(--ds-ease), background .2s var(--ds-ease);
}

.page-faq .faq-rail__link .ds-mono {
  color: var(--ds-mint-dim);
  font-size: 12px;
  letter-spacing: .06em;
}

.page-faq .faq-rail__link:hover {
  color: var(--ds-text);
  border-color: var(--ds-line);
}

.page-faq .faq-rail__link.is-active {
  color: var(--ds-text);
  border-color: rgba(75, 227, 164, .5);
  background: rgba(75, 227, 164, .1);
}

.page-faq .faq-rail__link.is-active .ds-mono {
  color: var(--ds-mint);
}

.page-faq .faq-rail__aside {
  margin-top: 22px;
  padding: 16px 18px;
  border: 1px solid var(--ds-line);
  border-radius: var(--ds-radius);
  background: rgba(16, 44, 34, .55);
}

.page-faq .faq-rail__aside .ds-caption {
  margin: 0 0 10px;
  color: var(--ds-muted);
}

.page-faq .faq-rail__aside .ds-btn {
  width: 100%;
  justify-content: center;
}

/* ---------- 题目卡片 ---------- */
.page-faq .faq-main {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
}

.page-faq .faq-item {
  border: 1px solid var(--ds-line);
  border-radius: var(--ds-radius-lg);
  background: var(--ds-panel);
  box-shadow: var(--faq-glow);
  overflow: hidden;
  scroll-margin-top: calc(var(--ds-header-h) + 20px);
}

.page-faq .faq-item__head {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-faq .faq-trigger {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 20px 20px;
  border: 0;
  background: transparent;
  color: var(--ds-text);
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background .2s var(--ds-ease);
}

.page-faq .faq-trigger:hover {
  background: rgba(75, 227, 164, .06);
}

.page-faq .faq-trigger__num {
  flex: none;
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--ds-mint);
}

.page-faq .faq-trigger__text {
  flex: 1 1 auto;
  font-size: clamp(17px, 1.55vw, 21px);
  font-weight: 700;
  letter-spacing: -.012em;
  line-height: 1.35;
}

.page-faq .faq-trigger .ds-fold__icon {
  position: relative;
  flex: none;
  width: 16px;
  height: 16px;
}

.page-faq .faq-trigger .ds-fold__icon::before,
.page-faq .faq-trigger .ds-fold__icon::after {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 100%;
  height: 2px;
  background: var(--ds-mint);
  transition: transform .24s var(--ds-ease), opacity .24s var(--ds-ease);
}

.page-faq .faq-trigger .ds-fold__icon::after {
  transform: rotate(90deg);
}

.page-faq .ds-fold[data-open="true"] .faq-trigger .ds-fold__icon::after {
  transform: rotate(0deg);
  opacity: 0;
}

.page-faq .faq-answer {
  padding: 22px 20px 26px;
  border-top: 1px solid var(--ds-line);
}

.page-faq .faq-answer .ds-text {
  margin: 0 0 16px;
  color: var(--ds-muted);
}

.page-faq .faq-answer .ds-text:last-child {
  margin-bottom: 0;
}

.page-faq .faq-note {
  padding-left: 14px;
  border-left: 2px solid var(--ds-mint-dim);
}

.page-faq .faq-answer__cta,
.page-faq .faq-answer__bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

/* ---------- 三种状态 ---------- */
.page-faq .faq-states {
  display: grid;
  gap: 10px;
  margin: 18px 0 22px;
}

.page-faq .faq-state {
  padding: 16px 16px 18px;
  border: 1px solid var(--ds-line);
  border-top-width: 3px;
  border-radius: var(--ds-radius);
  background: rgba(8, 23, 15, .58);
}

.page-faq .faq-state--out { border-top-color: var(--ds-warm); }
.page-faq .faq-state--doubt { border-top-color: var(--ds-cyan); }
.page-faq .faq-state--back { border-top-color: var(--ds-mint); }

.page-faq .faq-state__name {
  display: block;
  margin-bottom: 8px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--ds-text);
}

.page-faq .faq-state--out .faq-state__name { color: var(--ds-warm); }
.page-faq .faq-state--doubt .faq-state__name { color: var(--ds-cyan); }
.page-faq .faq-state--back .faq-state__name { color: var(--ds-mint); }

.page-faq .faq-state__desc {
  display: block;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ds-muted);
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 22px;
  border: 1px solid var(--ds-line);
  border-radius: var(--ds-radius);
  overflow: hidden;
  background: var(--ds-ink);
}

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

.page-faq .faq-figure__note {
  display: block;
  padding: 12px 16px;
  border-top: 1px solid var(--ds-line);
  font-size: 13px;
  line-height: 1.65;
  color: var(--ds-muted);
  background: rgba(8, 23, 15, .6);
}

/* ---------- 更新节奏时间轴 ---------- */
.page-faq .faq-timeline {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-faq .faq-timeline__row {
  display: grid;
  gap: 6px;
  padding: 14px 16px;
  border-left: 2px solid var(--ds-line);
  background: rgba(8, 23, 15, .45);
  transition: border-color .2s var(--ds-ease);
}

.page-faq .faq-timeline__row:hover {
  border-left-color: var(--ds-mint);
}

.page-faq .faq-timeline__key {
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--ds-mint);
}

.page-faq .faq-timeline__val {
  font-size: 15px;
  line-height: 1.72;
  color: var(--ds-muted);
}

/* ---------- 阅读步骤 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
  counter-reset: faqstep;
}

.page-faq .faq-steps__item {
  padding: 14px 16px 6px;
  border: 1px solid var(--ds-line);
  border-radius: var(--ds-radius);
  background: rgba(8, 23, 15, .45);
}

.page-faq .faq-steps__idx {
  display: inline-block;
  margin-bottom: 8px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--ds-cyan);
}

.page-faq .faq-steps__item .ds-text {
  margin-bottom: 10px;
}

/* ---------- 切换维度 ---------- */
.page-faq .faq-switch {
  display: grid;
  gap: 10px;
  margin: 18px 0 22px;
}

.page-faq .faq-switch__item {
  padding: 16px;
  border: 1px solid var(--ds-line);
  border-radius: var(--ds-radius);
  background: rgba(8, 23, 15, .45);
}

.page-faq .faq-switch__item .ds-text {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.7;
}

/* ---------- 文件列表 ---------- */
.page-faq .faq-files {
  display: grid;
  gap: 10px;
  margin: 18px 0 22px;
}

.page-faq .faq-file {
  position: relative;
  padding: 16px 16px 16px 20px;
  border: 1px solid var(--ds-line);
  border-radius: var(--ds-radius);
  background: rgba(8, 23, 15, .5);
  overflow: hidden;
}

.page-faq .faq-file::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--ds-mint), var(--ds-cyan));
}

.page-faq .faq-file__name {
  display: block;
  margin-bottom: 6px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ds-text);
}

.page-faq .faq-file__desc {
  display: block;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ds-muted);
}

/* ---------- 联系来意 ---------- */
.page-faq .faq-reasons {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-faq .faq-reasons li {
  padding: 13px 16px;
  border: 1px solid var(--ds-line);
  border-radius: var(--ds-radius);
  background: rgba(8, 23, 15, .45);
  font-size: 14px;
  line-height: 1.72;
  color: var(--ds-muted);
}

.page-faq .faq-reasons strong {
  color: var(--ds-text);
  font-weight: 700;
}

/* ---------- 尾部行动区 ---------- */
.page-faq .faq-next {
  padding: 0 0 84px;
}

.page-faq .faq-next__slab {
  position: relative;
  padding: 34px 24px 38px;
  border: 1px solid var(--ds-line);
  background:
    linear-gradient(120deg, rgba(75, 227, 164, .14) 0%, rgba(63, 208, 224, .05) 52%, rgba(8, 23, 15, 0) 100%),
    var(--ds-panel);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), 0 100%);
}

.page-faq .faq-next__title {
  margin: 12px 0 0;
  max-width: 22ch;
  color: var(--ds-text);
}

.page-faq .faq-next__text {
  margin: 14px 0 0;
  max-width: 56ch;
  color: var(--ds-muted);
}

.page-faq .faq-next__action {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

/* ---------- 桌面端 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-states {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

  .page-faq .faq-timeline__row {
    grid-template-columns: 96px minmax(0, 1fr);
    align-items: baseline;
    gap: 14px;
  }

  .page-faq .faq-trigger {
    padding: 24px 28px;
  }

  .page-faq .faq-answer {
    padding: 26px 28px 30px;
  }

  .page-faq .faq-next__slab {
    padding: 48px 44px 54px;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-split {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: var(--faq-gap);
    align-items: start;
    padding: 56px 0 88px;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--ds-header-h) + 22px);
  }

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

  .page-faq .faq-rail__link {
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0 var(--ds-radius) var(--ds-radius) 0;
    background: transparent;
    padding: 11px 14px;
    white-space: normal;
  }

  .page-faq .faq-rail__link:hover {
    background: rgba(75, 227, 164, .06);
  }

  .page-faq .faq-rail__link.is-active {
    border-left-color: var(--ds-mint);
    background: rgba(75, 227, 164, .09);
  }

  .page-faq .faq-rail__aside {
    margin-top: 28px;
  }

  .page-faq .faq-next__slab {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 32px;
  }

  .page-faq .faq-next__action {
    margin-top: 0;
    flex-wrap: nowrap;
  }
}

@media (min-width: 1320px) {
  .page-faq {
    --faq-rail-w: 320px;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-trigger,
  .page-faq .faq-rail__link,
  .page-faq .faq-trigger .ds-fold__icon::before,
  .page-faq .faq-trigger .ds-fold__icon::after,
  .page-faq .faq-timeline__row {
    transition: none;
  }
}
<<<END>>>