.page-faq {
  --faq-indent: clamp(2.4rem, 5vw, 3.6rem);
  --faq-node-top: 1.95rem;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-top: clamp(1.6rem, 4vw, 2.75rem);
  padding-bottom: clamp(2.25rem, 6vw, 4.25rem);
  background:
    radial-gradient(circle at 84% 6%, rgba(30, 127, 168, .13), transparent 56%),
    radial-gradient(circle at 8% 82%, rgba(242, 169, 59, .10), transparent 48%),
    var(--salt);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--lake) 0%, var(--lake-300) 38%, transparent 82%);
}

.page-faq .faq-hero-grid {
  align-items: center;
  gap: clamp(1.5rem, 4vw, 3rem);
  margin-top: clamp(1.4rem, 3.5vw, 2.4rem);
}

.page-faq .faq-hero-copy h1 {
  margin: .7rem 0 1rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 5.2vw, 3.5rem);
  line-height: 1.05;
  letter-spacing: -.02em;
  color: var(--ink-900);
  max-width: 16ch;
}

.page-faq .faq-lede {
  margin: 0;
  max-width: 34em;
  font-family: var(--font-body);
  font-size: clamp(1rem, 1.15vw, 1.08rem);
  line-height: 1.8;
  color: var(--text);
}

.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-top: clamp(1.3rem, 3vw, 1.9rem);
}

.page-faq .faq-facts {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(1rem, 3vw, 2.4rem);
  margin: clamp(1.5rem, 3.5vw, 2.1rem) 0 0;
  padding-top: 1.15rem;
  border-top: 1px solid var(--mist);
}

.page-faq .faq-facts div {
  display: flex;
  flex-direction: column;
  gap: .25rem;
}

.page-faq .faq-facts dt {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .12em;
  color: var(--lake-dark);
}

.page-faq .faq-facts dd {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  letter-spacing: -.01em;
  color: var(--ink-900);
}

.page-faq .faq-hero-media {
  position: relative;
}

.page-faq .faq-hero-figure {
  border: 1px solid rgba(30, 127, 168, .22);
  border-radius: var(--radius-l);
  background: var(--ink-900);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

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

/* ---------- 主体骨架 ---------- */
.page-faq .faq-body {
  background: var(--salt);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.75rem, 4vw, 3rem);
}

.page-faq .faq-rail {
  display: none;
}

.page-faq .faq-rail-list {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  border-left: 2px solid var(--mist);
}

.page-faq .faq-rail-list li + li {
  margin-top: .1rem;
}

.page-faq .faq-rail-list a {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto;
  column-gap: .65rem;
  align-items: baseline;
  padding: .7rem .6rem .7rem .85rem;
  margin-left: -2px;
  border-left: 2px solid transparent;
  color: var(--text);
  text-decoration: none;
  transition: background .25s var(--ease), border-color .25s var(--ease);
}

.page-faq .faq-rail-list a:hover,
.page-faq .faq-rail-list a:focus-visible {
  background: rgba(156, 207, 227, .26);
  border-left-color: var(--lake);
}

.page-faq .faq-rail-num {
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--flag);
  letter-spacing: -.02em;
}

.page-faq .faq-rail-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .97rem;
  color: var(--ink-900);
}

.page-faq .faq-rail-count {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .1em;
  color: var(--lake-dark);
}

/* ---------- 分组 ---------- */
.page-faq .faq-groups {
  min-width: 0;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(2.75rem, 7vw, 4.75rem);
}

.page-faq .faq-group-head {
  display: flex;
  align-items: flex-start;
  gap: clamp(.85rem, 2.4vw, 1.5rem);
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--ink-900);
}

.page-faq .faq-group-index {
  flex: none;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.9rem, 4.6vw, 2.9rem);
  line-height: .95;
  letter-spacing: -.03em;
  color: var(--flag);
}

.page-faq .faq-group-title h2 {
  margin: 0 0 .3rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--ink-900);
}

.page-faq .faq-group-title p {
  margin: 0;
  font-size: .94rem;
  line-height: 1.65;
  color: var(--ink-700);
  max-width: 34em;
}

/* ---------- 问答列表 ---------- */
.page-faq .faq-list {
  margin-top: .35rem;
}

.page-faq .faq-item {
  position: relative;
  padding-left: var(--faq-indent);
  border-bottom: 1px solid var(--mist);
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--lake-300);
}

.page-faq .faq-item:first-child::before {
  top: var(--faq-node-top);
}

.page-faq .faq-item:last-child::before {
  bottom: var(--faq-node-top);
}

.page-faq .faq-item::after {
  content: "";
  position: absolute;
  left: -4px;
  top: var(--faq-node-top);
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--salt);
  border: 2px solid var(--lake);
  box-sizing: border-box;
  transition: background .3s var(--ease), border-color .3s var(--ease), box-shadow .3s var(--ease);
}

.page-faq .faq-item:has([data-open])::after,
.page-faq .faq-item[data-open]::after {
  background: var(--flag);
  border-color: var(--flag);
  box-shadow: 0 0 0 4px rgba(232, 99, 26, .18);
}

.page-faq .faq-q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: clamp(.65rem, 1.9vw, 1.15rem);
  width: 100%;
  margin: 0;
  padding: clamp(1.05rem, 2.4vw, 1.4rem) 0;
  background: none;
  border: 0;
  font: inherit;
  text-align: left;
  color: inherit;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.page-faq .faq-q-index {
  flex: none;
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .06em;
  color: var(--lake-dark);
  padding-top: .28rem;
  transition: color .3s var(--ease);
}

.page-faq .faq-item:has([data-open]) .faq-q-index,
.page-faq .faq-item[data-open] .faq-q-index {
  color: var(--flag);
}

.page-faq .faq-q-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.02rem, 1.9vw, 1.22rem);
  line-height: 1.45;
  letter-spacing: -.005em;
  color: var(--ink-900);
  transition: color .25s var(--ease);
}

.page-faq .faq-q:hover .faq-q-title,
.page-faq .faq-q:focus-visible .faq-q-title {
  color: var(--lake-dark);
}

.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--lake);
  outline-offset: 4px;
  border-radius: var(--radius-s);
}

.page-faq .faq-q .fold-mark {
  flex: none;
  margin-top: .1rem;
  color: var(--lake);
}

/* ---------- 答案区 ---------- */
.page-faq .fold-inner {
  margin: 0 0 clamp(1rem, 2.4vw, 1.4rem);
  padding: clamp(1rem, 2.4vw, 1.35rem) clamp(1rem, 2.4vw, 1.5rem);
  border-left: 3px solid var(--lake);
  border-radius: 0 var(--radius-m) var(--radius-m) 0;
  background: rgba(156, 207, 227, .24);
  animation: faq-answer-in .34s var(--ease) both;
}

.page-faq .fold-inner p {
  margin: 0;
  max-width: 36em;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.82;
  color: var(--text);
}

.page-faq .fold-inner p + p {
  margin-top: .7rem;
}

@keyframes faq-answer-in {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .fold-inner { animation: none; }
  .page-faq .faq-item::after { transition: none; }
}

/* ---------- 手机端分栏 ---------- */
.page-faq .faq-group-body--split {
  margin-top: .35rem;
}

.page-faq .faq-mobile-figure {
  margin: clamp(1.4rem, 3.5vw, 2rem) 0 0;
  border-radius: var(--radius-l);
  background: linear-gradient(180deg, rgba(156, 207, 227, .3), rgba(223, 231, 236, .5));
  border: 1px solid rgba(30, 127, 168, .2);
  overflow: hidden;
}

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

.page-faq .faq-mobile-figure figcaption {
  padding: .85rem 1rem 1rem;
  font-family: var(--font-body);
  font-size: .86rem;
  line-height: 1.6;
  color: var(--ink-700);
}

/* ---------- 收尾面板 ---------- */
.page-faq .faq-group--closing {
  margin-top: clamp(2.75rem, 7vw, 4.75rem);
}

.page-faq .faq-closing-panel {
  position: relative;
  padding: clamp(1.6rem, 4.5vw, 3rem);
  border-radius: var(--radius-l);
  background:
    radial-gradient(circle at 88% 12%, rgba(232, 99, 26, .22), transparent 55%),
    linear-gradient(140deg, var(--ink-900) 0%, var(--ink-700) 100%);
  color: var(--salt);
  overflow: hidden;
}

.page-faq .faq-closing-panel::before {
  content: "";
  position: absolute;
  left: clamp(1.6rem, 4.5vw, 3rem);
  top: 0;
  width: 46px;
  height: 4px;
  background: var(--flag);
}

.page-faq .faq-closing-tag {
  color: var(--lake-300);
  margin: 0 0 1rem;
}

.page-faq .faq-closing-tag::before {
  background: var(--lake-300);
}

.page-faq .faq-closing-panel h2 {
  margin: 0 0 .85rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 3.6vw, 2.3rem);
  line-height: 1.12;
  letter-spacing: -.02em;
  color: #FFFFFF;
  max-width: 18ch;
}

.page-faq .faq-closing-panel p {
  margin: 0;
  max-width: 34em;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(248, 250, 251, .84);
}

.page-faq .faq-closing-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-top: clamp(1.2rem, 3vw, 1.75rem);
}

/* ---------- 右侧定位轨 ---------- */
.page-faq .faq-progress {
  display: none;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-facts {
    gap: 2.6rem;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 216px) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-rail {
    display: block;
    position: sticky;
    top: 6.5rem;
    align-self: start;
  }

  .page-faq .faq-group-body--split {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 286px);
    gap: clamp(1.5rem, 3vw, 2.5rem);
    align-items: start;
  }

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

@media (min-width: 1180px) {
  .page-faq .faq-progress {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.15rem;
    position: fixed;
    top: 50%;
    right: clamp(.7rem, 1.5vw, 1.35rem);
    transform: translateY(-50%);
    z-index: 30;
    padding: .9rem .3rem;
    border-radius: var(--radius-pill);
  }

  .page-faq .faq-progress-line {
    position: absolute;
    top: 1.2rem;
    bottom: 1.2rem;
    left: 50%;
    width: 1px;
    margin-left: -.5px;
    background: linear-gradient(180deg, var(--lake-300), rgba(156, 207, 227, .2));
  }

  .page-faq .faq-progress-dot {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: var(--salt);
    border: 1px solid rgba(30, 127, 168, .4);
    font-family: var(--font-mono);
    font-size: .6rem;
    letter-spacing: .04em;
    color: var(--lake-dark);
    text-decoration: none;
    transition: background .25s var(--ease), border-color .25s var(--ease), color .25s var(--ease), transform .25s var(--ease);
  }

  .page-faq .faq-progress-dot:hover,
  .page-faq .faq-progress-dot:focus-visible {
    background: var(--flag);
    border-color: var(--flag);
    color: #FFFFFF;
    transform: scale(1.12);
    outline: none;
  }
}

/* 窄屏防溢出 */
@media (max-width: 480px) {
  .page-faq {
    --faq-indent: 1.85rem;
    --faq-node-top: 1.7rem;
  }

  .page-faq .faq-q {
    grid-template-columns: auto minmax(0, 1fr);
  }

  .page-faq .faq-q .fold-mark {
    grid-column: 2;
    margin-top: .4rem;
  }

  .page-faq .faq-group-head {
    flex-direction: column;
    gap: .5rem;
  }
}
<<<END>>>