.page-faq {
  --faq-rail: 210px;
  --faq-line: rgba(77, 240, 200, 0.15);
  position: relative;
  background: var(--night);
  color: var(--white);
  font-family: var(--font-body);
  padding-bottom: clamp(48px, 8vw, 112px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  padding: clamp(22px, 4vw, 52px) 0 clamp(28px, 4vw, 64px);
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -20%;
  left: -14%;
  width: 128%;
  height: 126%;
  z-index: -1;
  pointer-events: none;
  background:
    linear-gradient(128deg, rgba(77, 240, 200, 0.16) 0%, rgba(8, 23, 17, 0) 58%),
    radial-gradient(circle at 84% 10%, rgba(245, 184, 75, 0.14), rgba(8, 23, 17, 0) 62%);
  clip-path: polygon(0 0, 100% 0, 71% 100%, 0 74%);
}
.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: clamp(16px, 3vw, 26px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
}
.page-faq .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
}
.page-faq .breadcrumb a:hover {
  color: var(--cyan);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  align-items: center;
}
.page-faq .eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cyan-soft);
}
.page-faq .faq-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(32px, 5.2vw, 62px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--white);
}
.page-faq .faq-hero__intro {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: rgba(234, 246, 240, 0.84);
}

.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  list-style: none;
}
.page-faq .faq-jump a {
  display: block;
  padding: 9px 15px;
  border: 1px solid rgba(143, 168, 160, 0.28);
  border-radius: var(--pill);
  font-size: 13.5px;
  color: var(--white);
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}
.page-faq .faq-jump a:hover,
.page-faq .faq-jump a:focus-visible {
  color: var(--night);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-faq .faq-hero__fig {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--faq-line);
  border-radius: var(--r-lg);
  background: linear-gradient(200deg, rgba(15, 42, 32, 0.9), rgba(4, 16, 11, 0.95));
  box-shadow: var(--shadow);
}
.page-faq .faq-hero__fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-faq .faq-hero__fig .figure__cap {
  display: block;
  position: static;
  padding: 10px 16px 12px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
  background: rgba(4, 16, 11, 0.66);
}

.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(10px, 2vw, 26px);
  margin: clamp(26px, 4vw, 46px) 0 0;
  padding: 0;
  list-style: none;
}
.page-faq .faq-stats li {
  padding-top: 12px;
  border-top: 1px solid var(--line);
}
.page-faq .faq-stat__num {
  display: block;
  font-size: clamp(22px, 3.4vw, 38px);
  line-height: 1.1;
  color: var(--cyan);
}
.page-faq .faq-stat__label {
  display: block;
  margin-top: 7px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 索引 + 卡片流 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.4vw, 48px);
  align-items: start;
}
.page-faq .faq-rail {
  position: relative;
  min-width: 0;
}
.page-faq .toc {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: rgba(15, 42, 32, 0.6);
}
.page-faq .toc__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
}
.page-faq .faq-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 2px;
  list-style: none;
  overflow-x: auto;
}
.page-faq .toc__link {
  display: block;
  flex: none;
  padding: 8px 12px;
  border: 1px solid rgba(143, 168, 160, 0.28);
  border-radius: var(--pill);
  font-size: 13px;
  white-space: nowrap;
  color: var(--mist);
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}
.page-faq .toc__link:hover {
  color: var(--cyan);
  border-color: var(--line);
}
.page-faq .toc__link[data-current] {
  color: var(--night);
  background: var(--cyan);
  border-color: var(--cyan);
  font-weight: 500;
}
.page-faq .faq-rail__note {
  display: none;
}

.page-faq .faq-stream {
  display: grid;
  gap: clamp(34px, 5vw, 68px);
  min-width: 0;
}
.page-faq .faq-sec {
  scroll-margin-top: 108px;
}
.page-faq .faq-sec .section-head {
  margin-bottom: clamp(16px, 2.4vw, 24px);
}
.page-faq .faq-sec .section-head__idx {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan-soft);
}
.page-faq .faq-sec .section-head__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(23px, 3vw, 38px);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--white);
}
.page-faq .faq-sec .section-head__note {
  margin: 10px 0 0;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 折叠问答卡 ---------- */
.page-faq .faq-item {
  position: relative;
  overflow: hidden;
  margin-top: 12px;
  border: 1px solid rgba(143, 168, 160, 0.22);
  border-radius: var(--r-md);
  background: linear-gradient(180deg, var(--turf) 0%, var(--turf-2) 100%);
}
.page-faq .faq-item::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: var(--cyan);
  opacity: 0.5;
}
.page-faq .faq-item--up::before {
  background: var(--amber);
  opacity: 0.92;
}
.page-faq .faq-item--down::before {
  background: var(--red);
  opacity: 0.92;
}
.page-faq .faq-item__q {
  margin: 0;
  font-size: inherit;
  font-weight: 400;
}
.page-faq .fold__btn {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  width: 100%;
  padding: 15px 16px 15px 19px;
  border: 0;
  background: none;
  color: var(--white);
  font: inherit;
  text-align: left;
  cursor: pointer;
}
.page-faq .fold__btn:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -3px;
}
.page-faq .faq-item__num {
  flex: none;
  padding: 2px 8px;
  border: 1px solid var(--faq-line);
  border-radius: var(--pill);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--cyan);
}
.page-faq .faq-item__text {
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.6;
  transition: color 0.2s ease;
}
.page-faq .fold__btn:hover .faq-item__text {
  color: var(--cyan-soft);
}
.page-faq .fold__icon {
  position: relative;
  flex: none;
  width: 18px;
  height: 18px;
  margin-left: auto;
  margin-top: 3px;
}
.page-faq .fold__icon::before,
.page-faq .fold__icon::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  border-radius: 2px;
}
.page-faq .fold__icon::before {
  top: 8px;
  left: 0;
  right: 0;
  height: 2px;
}
.page-faq .fold__icon::after {
  top: 0;
  bottom: 0;
  left: 8px;
  width: 2px;
  transition: transform 0.25s ease;
}
.page-faq .fold__btn[aria-expanded="true"] .fold__icon::after {
  transform: scaleY(0);
}

.page-faq .fold__body {
  display: none;
  padding: 0 18px 18px 19px;
}
.page-faq .fold__body[data-open] {
  display: block;
}
.page-faq .fold__body p {
  margin: 12px 0 0;
  max-width: 72ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: rgba(234, 246, 240, 0.86);
}
.page-faq .fold__body p + p {
  margin-top: 10px;
}
.page-faq .fold__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--faq-line);
}
.page-faq .fold__body a:hover {
  color: var(--cyan-soft);
  border-bottom-color: var(--cyan-soft);
}
.page-faq .fold__body .pill {
  margin-right: 6px;
  vertical-align: 1px;
}

.page-faq .faq-figure {
  margin: clamp(14px, 2.4vw, 22px) 0 0;
  overflow: hidden;
  border: 1px solid var(--faq-line);
  border-radius: var(--r-md);
  background: rgba(4, 16, 11, 0.7);
}
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-faq .faq-figure .figure__cap {
  display: block;
  position: static;
  padding: 10px 16px 12px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 断点 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }
  .page-faq .faq-item .fold__btn {
    padding: 17px 20px 17px 23px;
  }
  .page-faq .fold__body {
    padding: 0 22px 20px 23px;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
  }
  .page-faq .faq-rail {
    position: sticky;
    top: 104px;
  }
  .page-faq .toc {
    padding: 16px 12px 16px 14px;
    background: rgba(15, 42, 32, 0.5);
  }
  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
  }
  .page-faq .toc__link {
    padding: 9px 12px;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0 var(--r-sm) var(--r-sm) 0;
    background: none;
    white-space: normal;
    line-height: 1.5;
  }
  .page-faq .toc__link[data-current] {
    color: var(--cyan);
    background: rgba(77, 240, 200, 0.12);
    border-left-color: var(--cyan);
  }
  .page-faq .faq-rail__note {
    display: block;
    margin: 14px 0 0;
    padding-left: 12px;
    font-size: 12px;
    line-height: 1.65;
  }
}

@media (max-width: 520px) {
  .page-faq .faq-stats {
    grid-template-columns: minmax(0, 1fr);
  }
  .page-faq .faq-stat__num {
    font-size: 26px;
  }
  .page-faq .fold__btn {
    gap: 9px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .toc__link,
  .page-faq .faq-jump a,
  .page-faq .faq-item__text,
  .page-faq .fold__icon::after {
    transition: none;
  }
}
<<<END>>>