.page-faq {
  --faq-radius: 2px;
  --faq-line: var(--slate-700);
  --faq-pad: clamp(20px, 3.2vw, 36px);
  display: block;
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink-950);
  border-bottom: 1px solid var(--faq-line);
  padding: clamp(40px, 7vw, 104px) 0 clamp(36px, 5vw, 72px);
}

.page-faq .faq-hero__cut {
  position: absolute;
  top: -32%;
  right: -22%;
  width: min(680px, 96vw);
  height: min(680px, 96vw);
  background: radial-gradient(circle at 32% 34%, rgba(53, 240, 140, 0.16), rgba(53, 240, 140, 0) 64%);
  clip-path: polygon(56% 0%, 100% 0%, 100% 100%, 0% 100%);
  pointer-events: none;
}

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

.page-faq .faq-hero .eyebrow {
  margin: clamp(18px, 3vw, 30px) 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--signal-green);
}

.page-faq .faq-hero h1 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(36px, 8.4vw, 96px);
  line-height: 1.04;
  letter-spacing: -0.03em;
  color: var(--paper-050);
}

.page-faq .faq-hero .lede {
  max-width: 46ch;
  margin: clamp(16px, 2.4vw, 28px) 0 0;
  font-size: clamp(15px, 1.7vw, 18px);
  line-height: 1.78;
  color: var(--fog-200);
}

.page-faq .faq-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(30px, 4.4vw, 52px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--faq-line);
  border: 1px solid var(--faq-line);
}

.page-faq .faq-fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--ink-900);
  padding: 16px 18px;
}

.page-faq .faq-fact__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(20px, 3vw, 28px);
  line-height: 1.1;
  color: var(--signal-green);
}

.page-faq .faq-fact__label {
  font-size: 12px;
  line-height: 1.55;
  letter-spacing: 0.02em;
  color: var(--fog-500);
}

/* ---------- 区块节奏 ---------- */
.page-faq .faq-block {
  padding: clamp(56px, 8vw, 120px) 0;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-block:last-of-type {
  border-bottom: 0;
}

.page-faq .faq-head {
  max-width: 720px;
  margin-bottom: clamp(28px, 4vw, 52px);
}

.page-faq .faq-head .section-index {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--fog-500);
}

.page-faq .faq-head h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(26px, 4.6vw, 46px);
  line-height: 1.14;
  letter-spacing: -0.025em;
  color: var(--paper-050);
}

.page-faq .faq-head__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--fog-200);
  max-width: 52ch;
}

/* ---------- 三步上手 ---------- */
.page-faq .faq-rail {
  display: block;
  width: 100%;
  height: auto;
  max-height: 72px;
  color: var(--slate-600);
  margin-bottom: clamp(22px, 3vw, 36px);
}

.page-faq .faq-rail__dot {
  fill: var(--ink-900);
  stroke: var(--slate-600);
  stroke-width: 2;
}

.page-faq .faq-rail__dot--on {
  fill: var(--signal-green);
  stroke: var(--signal-green);
}

.page-faq .faq-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--faq-line);
  border: 1px solid var(--faq-line);
}

.page-faq .faq-step {
  background: var(--ink-900);
  padding: var(--faq-pad);
}

.page-faq .faq-step__idx {
  display: block;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--signal-green);
  margin-bottom: 12px;
}

.page-faq .faq-step h3 {
  margin: 0 0 10px;
  font-size: clamp(17px, 2vw, 21px);
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--paper-050);
}

.page-faq .faq-step p {
  margin: 0;
  max-width: 44ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--fog-200);
}

.page-faq .faq-step a {
  color: var(--signal-green);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 240, 140, 0.45);
}

.page-faq .faq-step a:hover,
.page-faq .faq-step a:focus-visible {
  border-bottom-color: var(--signal-green);
}

.page-faq .faq-steps__figure {
  margin: clamp(28px, 4vw, 48px) 0 0;
}

/* ---------- 问答布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
}

.page-faq .faq-index__title {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--fog-500);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 10px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-index__list a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 13px;
  background: var(--ink-800);
  border: 1px solid var(--faq-line);
  border-radius: var(--faq-radius);
  color: var(--fog-200);
  text-decoration: none;
  font-size: 13.5px;
  line-height: 1.4;
  white-space: nowrap;
  min-height: 44px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--paper-050);
  border-color: var(--signal-green);
  background: rgba(53, 240, 140, 0.06);
}

.page-faq .faq-index__list .mono {
  font-size: 11px;
  color: var(--slate-600);
  flex: 0 0 auto;
}

.page-faq .faq-index__list a:hover .mono,
.page-faq .faq-index__list a:focus-visible .mono {
  color: var(--signal-green);
}

/* ---------- 分组与条目 ---------- */
.page-faq .faq-groups {
  display: grid;
  gap: clamp(40px, 6vw, 76px);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 14px;
  align-items: baseline;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-group__idx {
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  color: var(--signal-green);
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(19px, 2.6vw, 28px);
  font-weight: 400;
  line-height: 1.25;
  letter-spacing: -0.015em;
  color: var(--paper-050);
}

.page-faq .faq-group__head p {
  grid-column: 1 / -1;
  margin: 4px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--fog-500);
  max-width: 60ch;
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-line);
  scroll-margin-top: 120px;
}

.page-faq .faq-item summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 20px 6px 20px 2px;
  min-height: 44px;
  cursor: pointer;
  list-style: none;
  transition: background var(--dur) var(--ease);
}

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

.page-faq .faq-item summary:hover {
  background: rgba(53, 240, 140, 0.04);
}

.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--signal-green);
  outline-offset: 2px;
}

.page-faq .faq-item__idx {
  flex: 0 0 auto;
  padding-top: 5px;
  font-size: 12px;
  color: var(--slate-600);
}

.page-faq .faq-item__q {
  flex: 1 1 auto;
  margin: 0;
  font-size: clamp(15.5px, 1.9vw, 17.5px);
  font-weight: 500;
  line-height: 1.55;
  color: var(--paper-050);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-item[open] .faq-item__q {
  color: var(--signal-green);
}

.page-faq .faq-item__mark {
  position: relative;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  margin-top: 7px;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--fog-500);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-item__mark::before {
  top: 6px;
  left: 0;
  width: 14px;
  height: 2px;
}

.page-faq .faq-item__mark::after {
  top: 0;
  left: 6px;
  width: 2px;
  height: 14px;
}

.page-faq .faq-item[open] .faq-item__mark::before {
  background: var(--signal-green);
}

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

.page-faq .faq-item__body {
  padding: 0 6px 28px 24px;
  max-width: 64ch;
}

.page-faq .faq-item__body p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.82;
  color: var(--fog-200);
}

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

.page-faq .faq-item__body a {
  color: var(--signal-green);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 240, 140, 0.45);
}

.page-faq .faq-item__body a:hover,
.page-faq .faq-item__body a:focus-visible {
  border-bottom-color: var(--signal-green);
}

.page-faq .faq-note {
  padding: 13px 15px;
  background: var(--paper-050);
  color: var(--ink-950) !important;
  border-radius: var(--faq-radius);
  font-size: 14px !important;
  line-height: 1.72 !important;
}

/* ---------- 术语表 ---------- */
.page-faq .faq-glossary__figure {
  margin: 0 0 clamp(24px, 3.4vw, 40px);
}

.page-faq .faq-glossary {
  margin: 0;
  display: grid;
  gap: 1px;
  background: var(--faq-line);
  border: 1px solid var(--faq-line);
}

.page-faq .faq-glossary__row {
  display: grid;
  gap: 8px;
  background: var(--ink-900);
  padding: clamp(16px, 2.4vw, 26px) clamp(16px, 2.6vw, 30px);
}

.page-faq .faq-glossary dt {
  font-family: var(--font-mono);
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--signal-green);
}

.page-faq .faq-glossary dd {
  margin: 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--fog-200);
}

/* ---------- 出口 ---------- */
.page-faq .faq-exit {
  display: grid;
  gap: clamp(26px, 3.4vw, 44px);
  padding: clamp(24px, 3.6vw, 46px);
}

.page-faq .faq-exit__main .section-index {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--fog-500);
}

.page-faq .faq-exit__main h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(22px, 3.4vw, 34px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--paper-050);
}

.page-faq .faq-exit__main p {
  margin: 0 0 14px;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--fog-200);
}

.page-faq .faq-exit__main .btn {
  margin-top: 6px;
}

.page-faq .faq-exit .contact-list {
  margin: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-exit .contact-list__term {
  margin-top: 14px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--fog-500);
}

.page-faq .faq-exit .contact-list__term:first-of-type {
  margin-top: 0;
}

.page-faq .faq-exit .contact-list__value {
  margin: 0;
  font-size: 15px;
  line-height: 1.65;
  color: var(--paper-050);
  word-break: break-word;
}

.page-faq .faq-exit__note {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--faq-line);
  font-size: 13px;
  line-height: 1.72;
  color: var(--fog-500);
  max-width: 40ch;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-fact {
    padding: 20px 22px;
  }

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

  .page-faq .faq-item__body {
    padding-left: 40px;
  }

  .page-faq .faq-glossary__row {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: clamp(20px, 3vw, 36px);
    align-items: baseline;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: 268px minmax(0, 1fr);
    gap: clamp(40px, 5vw, 80px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 108px;
    align-self: start;
    max-height: calc(100vh - 148px);
    overflow-y: auto;
    padding-right: 6px;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index__list a {
    background: transparent;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    padding: 7px 10px 7px 12px;
    white-space: normal;
    min-height: 0;
    font-size: 13.5px;
  }

  .page-faq .faq-index__list a:hover,
  .page-faq .faq-index__list a:focus-visible {
    background: rgba(53, 240, 140, 0.05);
    border-left-color: var(--signal-green);
  }

  .page-faq .faq-exit {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: clamp(36px, 4.4vw, 72px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}
<<<END>>>