.page-faq {
  --faq-sticky-top: calc(var(--rail-bar-h) + 8px);
  background: var(--sea);
  color: var(--text);
  overflow-x: clip;
}

/* ── 首屏 ── */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 28px 0 40px;
  background:
    radial-gradient(120% 130% at 84% -10%, #143a5c 0%, rgba(7, 26, 43, 0) 58%),
    var(--sea);
}

.page-faq .faq-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.26;
}

.page-faq .faq-hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
  display: block;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(53, 242, 208, 0.07) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(0deg, rgba(53, 242, 208, 0.05) 0 1px, transparent 1px 72px);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 88%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 88%);
}

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

.page-faq .faq-hero__eyebrow {
  margin: 20px 0 0;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--cyan);
  text-transform: uppercase;
}

.page-faq .faq-hero__title {
  margin: 12px 0 0;
  font-size: clamp(2.05rem, 8.4vw, 4.4rem);
  line-height: 1.02;
  letter-spacing: -0.03em;
  font-weight: 800;
  color: #ffffff;
}

.page-faq .faq-hero__title em {
  font-style: normal;
  color: var(--cyan);
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 46ch;
  font-size: 0.94rem;
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .faq-hero__rule {
  width: 56px;
  height: 3px;
  margin: 22px 0 0;
  border-radius: 2px;
  background: var(--amber);
}

.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-jump .chip {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid rgba(53, 242, 208, 0.34);
  background: rgba(53, 242, 208, 0.08);
  color: var(--cyan);
  font-size: 0.8rem;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.page-faq .faq-jump .chip:hover,
.page-faq .faq-jump .chip:focus-visible {
  background: rgba(53, 242, 208, 0.18);
  border-color: var(--cyan);
}

/* ── 主体两栏 ── */
.page-faq .faq-body {
  padding: 6px 0 52px;
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  align-items: start;
}

/* ── 问题索引 ── */
.page-faq .faq-index {
  position: sticky;
  top: var(--faq-sticky-top);
  z-index: 6;
  padding: 10px 0 8px;
  background: var(--sea);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-index__caption {
  margin: 0 0 8px;
  font-size: 0.66rem;
  letter-spacing: 0.24em;
  color: var(--mist);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  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: inline-flex;
  align-items: center;
  gap: 7px;
  white-space: nowrap;
  padding: 9px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--mid);
  color: var(--mist);
  font-size: 0.82rem;
  text-decoration: none;
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.page-faq .faq-index__num {
  font-size: 0.7rem;
  color: var(--cyan);
  opacity: 0.75;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--cyan);
  border-color: rgba(53, 242, 208, 0.45);
}

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

.page-faq .faq-group {
  margin-bottom: 38px;
  scroll-margin-top: 120px;
}

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

.page-faq .faq-group__head {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.page-faq .faq-group__tag {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--cyan);
  color: var(--sea);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(1.22rem, 4.6vw, 1.72rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: #ffffff;
}

.page-faq .faq-group__note {
  margin: 0 0 16px;
  font-size: 0.88rem;
  line-height: 1.72;
  color: var(--mist);
}

/* ── 手风琴 ── */
.page-faq .qa {
  margin-bottom: 10px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: linear-gradient(158deg, rgba(11, 34, 57, 0.96), rgba(7, 26, 43, 0.96));
  overflow: hidden;
  transition: border-color 0.25s ease, background 0.25s ease;
}

.page-faq .qa[open] {
  border-color: rgba(53, 242, 208, 0.42);
  background: linear-gradient(158deg, rgba(13, 43, 68, 0.98), rgba(8, 29, 48, 0.98));
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 11px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 0.96rem;
  font-weight: 600;
  line-height: 1.55;
  color: #ffffff;
}

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

.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -3px;
}

.page-faq .qa__num {
  flex: 0 0 auto;
  padding-top: 2px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--cyan);
  opacity: 0.82;
}

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

.page-faq .qa__sign {
  position: relative;
  flex: 0 0 16px;
  width: 16px;
  height: 16px;
  margin-top: 4px;
}

.page-faq .qa__sign::before,
.page-faq .qa__sign::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.page-faq .qa__sign::before {
  left: 0;
  top: 7px;
  width: 16px;
  height: 2px;
}

.page-faq .qa__sign::after {
  left: 7px;
  top: 0;
  width: 2px;
  height: 16px;
}

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

.page-faq .qa__a {
  padding: 0 16px 17px;
}

.page-faq .qa__a p {
  margin: 0 0 9px;
  font-size: 0.9rem;
  line-height: 1.78;
  color: #cbdae5;
}

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

.page-faq .qa__link {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-faq .qa__link:hover {
  color: #ffffff;
}

/* ── 价格三格 ── */
.page-faq .price-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin: 12px 0 14px;
}

.page-faq .price-cell {
  padding: 10px 11px;
  border-radius: var(--r-sm);
  border: 1px solid rgba(255, 179, 71, 0.32);
  background: rgba(255, 179, 71, 0.1);
}

.page-faq .price-cell__label {
  display: block;
  margin-bottom: 4px;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--amber);
  text-transform: uppercase;
}

.page-faq .price-cell__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.28rem;
  line-height: 1.1;
  color: #ffffff;
}

.page-faq .price-cell__unit {
  margin-left: 2px;
  font-size: 0.7rem;
  color: var(--amber);
}

/* ── 章节配图 ── */
.page-faq .faq-figure {
  margin: 18px 0 0;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  overflow: hidden;
  background: var(--mid);
}

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

.page-faq .faq-figure .media__caption {
  padding: 9px 14px;
  font-size: 0.75rem;
  line-height: 1.6;
  color: var(--mist);
  border-top: 1px solid var(--line);
}

/* ── 收尾 ── */
.page-faq .faq-next {
  padding: 34px 0 56px;
  background: linear-gradient(180deg, var(--sea), var(--mid));
  border-top: 1px solid var(--line);
}

.page-faq .faq-next__panel {
  position: relative;
  padding: 26px 20px;
  border-radius: var(--r-lg);
  border: 1px solid rgba(53, 242, 208, 0.22);
  background:
    radial-gradient(90% 130% at 100% 0%, rgba(53, 242, 208, 0.16), rgba(53, 242, 208, 0) 62%),
    linear-gradient(158deg, #0d2b46, #081d30);
  overflow: hidden;
}

.page-faq .faq-next__panel::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--amber) 62%, rgba(255, 77, 126, 0.7));
}

.page-faq .faq-next__eyebrow {
  margin: 0 0 10px;
  font-size: 0.66rem;
  letter-spacing: 0.24em;
  color: var(--cyan);
}

.page-faq .faq-next__title {
  margin: 0 0 10px;
  font-size: clamp(1.3rem, 5vw, 1.9rem);
  line-height: 1.24;
  letter-spacing: -0.015em;
  color: #ffffff;
}

.page-faq .faq-next__text {
  margin: 0 0 20px;
  max-width: 52ch;
  font-size: 0.9rem;
  line-height: 1.76;
  color: var(--mist);
}

.page-faq .faq-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ── 中屏 ── */
@media (min-width: 720px) {
  .page-faq .faq-hero {
    padding: 40px 0 52px;
  }

  .page-faq .qa__q {
    padding: 17px 20px;
    font-size: 1rem;
  }

  .page-faq .qa__a {
    padding: 0 20px 20px;
  }

  .page-faq .faq-next__panel {
    padding: 34px 30px;
  }

  .page-faq .price-cell__num {
    font-size: 1.45rem;
  }
}

/* ── 桌面：左侧固定索引 ── */
@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: 48px 0 60px;
  }

  .page-faq .faq-body {
    padding: 10px 0 64px;
  }

  .page-faq .faq-layout {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: 44px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 34px;
    padding: 0;
    background: none;
    border-bottom: 0;
    align-self: start;
  }

  .page-faq .faq-index__caption {
    margin-bottom: 12px;
    padding-left: 12px;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 3px;
    overflow: visible;
    padding: 0;
    border-left: 1px solid var(--line);
  }

  .page-faq .faq-index__link {
    padding: 10px 12px;
    border: 0;
    border-radius: 0 var(--r-sm) var(--r-sm) 0;
    background: transparent;
    font-size: 0.84rem;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    background: rgba(53, 242, 208, 0.09);
    box-shadow: inset 2px 0 0 var(--cyan);
  }

  .page-faq .faq-group {
    margin-bottom: 46px;
    scroll-margin-top: 34px;
  }

  .page-faq .qa {
    margin-bottom: 11px;
  }

  .page-faq .faq-figure {
    margin-top: 22px;
  }

  .page-faq .faq-next {
    padding: 46px 0 70px;
  }
}

@media (max-width: 359.98px) {
  .page-faq .price-row {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__sign::before,
  .page-faq .qa__sign::after,
  .page-faq .faq-jump .chip,
  .page-faq .faq-index__link {
    transition: none;
  }
}
<<<END>>>