.page-faq {
  --faq-rail-w: 272px;
  --faq-gap: clamp(28px, 4.5vw, 64px);
  --qa-pad-x: 16px;
  --qa-num-w: 26px;
}

@media (min-width: 560px) {
  .page-faq {
    --qa-pad-x: 20px;
    --qa-num-w: 34px;
  }
}

@media (min-width: 1024px) {
  .page-faq {
    --qa-pad-x: 22px;
  }
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumbs {
  padding-top: clamp(16px, 3vw, 28px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(32px, 5vw, 64px) 0 clamp(28px, 4vw, 52px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(115% 120% at 4% 0%, rgba(74, 30, 109, 0.62) 0%, rgba(74, 30, 109, 0) 62%),
    radial-gradient(80% 80% at 100% 0%, rgba(0, 229, 199, 0.12) 0%, rgba(0, 229, 199, 0) 58%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -8%;
  bottom: -40%;
  width: min(560px, 68%);
  height: 1px;
  background: linear-gradient(90deg, rgba(46, 50, 64, 0) 0%, var(--line) 34%, rgba(0, 229, 199, 0.55) 100%);
  transform: rotate(-11deg);
  transform-origin: right center;
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 18px;
  justify-items: start;
}

.page-faq .faq-hero .eyebrow {
  color: var(--cyan);
}

.page-faq .faq-hero .display-title {
  max-width: 22ch;
  margin: 0;
  letter-spacing: -0.015em;
}

.page-faq .faq-hero .lede {
  max-width: 58ch;
  margin: 0;
  color: var(--silver);
}

.page-faq .faq-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  margin: 8px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
  width: 100%;
}

.page-faq .faq-facts li {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

.page-faq .faq-facts strong {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--ivory);
  letter-spacing: -0.01em;
}

/* ---------- 主体分栏 ---------- */
.page-faq .faq-section {
  padding: clamp(32px, 5vw, 68px) 0 clamp(48px, 7vw, 96px);
}

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

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
  }
}

/* ---------- 左侧分类目录 ---------- */
.page-faq .faq-rail__card {
  border: 1px solid var(--line);
  border-radius: var(--r-panel);
  background: var(--panel);
  padding: 16px;
}

.page-faq .faq-rail__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-rail__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-rail__item {
  flex: none;
}

.page-faq .faq-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  border-bottom: 2px solid transparent;
  color: var(--silver);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--ivory);
  border-bottom-color: var(--cyan);
  background: rgba(0, 229, 199, 0.06);
}

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
}

@media (min-width: 1024px) {
  .page-faq .faq-rail {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-rail__card {
    padding: 20px;
  }

  .page-faq .faq-rail__list {
    display: grid;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-rail__link {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 10px;
    align-items: baseline;
    padding: 9px 12px;
    border-bottom: none;
    border-left: 2px solid transparent;
    white-space: normal;
    font-size: 15px;
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    border-left-color: var(--cyan);
    border-bottom-color: transparent;
  }
}

/* ---------- 分类区块 ---------- */
.page-faq .faq-cat + .faq-cat {
  margin-top: clamp(44px, 6vw, 80px);
  padding-top: clamp(28px, 4vw, 44px);
  border-top: 1px solid var(--line);
}

.page-faq .faq-cat__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 16px;
  margin-bottom: 22px;
}

.page-faq .faq-cat__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  padding-top: 7px;
  line-height: 1;
}

.page-faq .faq-cat__head h2 {
  margin: 0;
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.015em;
  color: var(--ivory);
}

.page-faq .faq-cat__intro {
  grid-column: 2;
  margin: 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 24px;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--r-panel);
}

/* ---------- 问答折叠 ---------- */
.page-faq .qa {
  border: 1px solid var(--line);
  border-left: 2px solid transparent;
  border-radius: var(--r-panel);
  background: var(--panel);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .qa + .qa {
  margin-top: 10px;
}

.page-faq .qa:hover {
  border-color: #3a3f51;
}

.page-faq .qa[open] {
  border-left-color: var(--cyan);
  background: #1b1d26;
}

.page-faq .qa > summary {
  display: grid;
  grid-template-columns: var(--qa-num-w) minmax(0, 1fr) 16px;
  gap: 12px;
  align-items: start;
  padding: var(--qa-pad-x);
  list-style: none;
  cursor: pointer;
  color: var(--ivory);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.55;
  transition: color var(--dur) var(--ease);
}

.page-faq .qa > summary::-webkit-details-marker {
  display: none;
}

.page-faq .qa > summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .qa__num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--muted);
  line-height: 2;
  transition: color var(--dur) var(--ease);
}

.page-faq .qa[open] .qa__num {
  color: var(--cyan);
}

.page-faq .qa__mark {
  position: relative;
  width: 16px;
  height: 16px;
  margin-top: 6px;
  justify-self: end;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  background: var(--muted);
  transition: transform 240ms var(--ease), background 240ms var(--ease);
}

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

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

.page-faq .qa:hover .qa__mark::before,
.page-faq .qa:hover .qa__mark::after {
  background: var(--cyan);
}

.page-faq .qa[open] .qa__mark::before {
  background: var(--cyan);
}

.page-faq .qa[open] .qa__mark::after {
  transform: scaleY(0);
}

.page-faq .qa__body {
  padding: 0 var(--qa-pad-x) calc(var(--qa-pad-x) + 2px)
    calc(var(--qa-pad-x) + var(--qa-num-w) + 12px);
}

.page-faq .qa__body p {
  margin: 0 0 12px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--silver);
}

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

.page-faq .price {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--amber);
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.page-faq .qa__next {
  display: inline-block;
  margin-top: 2px;
  padding-bottom: 1px;
  border-bottom: 1px solid rgba(0, 229, 199, 0.35);
  color: var(--cyan);
  font-size: 13.5px;
  font-weight: 500;
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .qa__next:hover,
.page-faq .qa__next:focus-visible {
  border-bottom-color: var(--cyan);
  color: #6ff3e0;
}

@media (max-width: 559px) {
  .page-faq .qa > summary {
    font-size: 15px;
    gap: 10px;
  }

  .page-faq .qa__body p {
    font-size: 15px;
  }
}

@media (max-width: 479px) {
  .page-faq .qa__body {
    padding-left: var(--qa-pad-x);
  }
}

/* ---------- 收口区 ---------- */
.page-faq .faq-close {
  border-top: 1px solid var(--line);
  padding: clamp(40px, 6vw, 76px) 0;
  background: linear-gradient(180deg, rgba(74, 30, 109, 0.32) 0%, rgba(20, 21, 26, 0) 78%);
}

.page-faq .faq-close__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}

@media (min-width: 900px) {
  .page-faq .faq-close__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 60px;
    align-items: start;
  }
}

.page-faq .faq-close__lead h2 {
  margin: 0 0 14px;
  font-size: clamp(23px, 3.2vw, 32px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--ivory);
}

.page-faq .faq-close__lead p {
  margin: 0 0 24px;
  max-width: 44ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--silver);
}

.page-faq .faq-close__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-close__panel {
  border: 1px solid var(--line);
  border-radius: var(--r-panel);
  background: var(--panel);
  padding: clamp(20px, 3vw, 28px);
}

.page-faq .faq-close__panel h3 {
  margin: 0 0 16px;
  font-size: 16px;
  font-weight: 700;
  color: var(--ivory);
}

.page-faq .faq-close__list {
  margin: 0 0 16px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-faq .faq-close__list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--silver);
}

.page-faq .faq-close__list li:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.page-faq .faq-close__list .mono {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.06em;
}

.page-faq .faq-close__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__num,
  .page-faq .qa__mark::before,
  .page-faq .qa__mark::after,
  .page-faq .qa__next,
  .page-faq .faq-rail__link {
    transition: none;
  }
}
<<<END>>>