.page-faq {
  --faq-rail-w: 250px;
  --faq-card-bg: linear-gradient(180deg, rgba(22, 32, 74, .92), rgba(11, 18, 48, .58));
}

.page-faq .section {
  padding-block: clamp(40px, 6vw, 74px);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(28px, 4vw, 44px) clamp(36px, 5vw, 60px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -32vw;
  right: -14vw;
  width: 62vw;
  height: 62vw;
  max-width: 720px;
  max-height: 720px;
  background: radial-gradient(circle at 42% 46%, rgba(43, 240, 214, .17), transparent 66%);
  pointer-events: none;
}

.page-faq .faq-hero .breadcrumbs {
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-faq .faq-hero__grid {
  position: relative;
  display: grid;
  gap: 30px;
}

.page-faq .faq-hero__title {
  font-family: var(--font-head);
  font-size: clamp(32px, 6.2vw, 68px);
  font-weight: 300;
  line-height: 1.05;
  letter-spacing: .01em;
  color: var(--text);
  margin: 12px 0 20px;
  max-width: 20ch;
}

.page-faq .faq-hero__title strong {
  font-weight: 800;
  color: var(--cyan);
}

.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-hero__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
}

.page-faq .faq-hero__stats li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: rgba(22, 32, 74, .62);
}

.page-faq .faq-hero__stats .data-num {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cyan);
}

.page-faq .faq-hero__stats span:last-child {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.4;
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.65fr) minmax(230px, .72fr);
    gap: 56px;
    align-items: end;
  }

  .page-faq .faq-hero__stats {
    grid-template-columns: 1fr;
  }
}

/* ---------- 五个阶段 ---------- */

.page-faq .faq-steps__title {
  font-family: var(--font-head);
  font-size: clamp(26px, 3.8vw, 40px);
  font-weight: 700;
  line-height: 1.14;
  color: var(--text);
  margin: 10px 0 14px;
}

.page-faq .faq-steps__lede {
  margin: 0 0 clamp(26px, 4vw, 40px);
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .step-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .page-faq .step-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-faq .step-list {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 14px;
  }
}

.page-faq .step {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 18px 22px;
  border: 1px solid var(--line);
  border-top: 2px solid rgba(43, 240, 214, .5);
  border-radius: var(--r);
  background: var(--faq-card-bg);
}

.page-faq .step__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--data);
}

.page-faq .step__title {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--text);
  margin: 0;
}

.page-faq .step__body {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .step__trap {
  margin: auto 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .step__trap b {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .14em;
  color: var(--orange);
  margin-bottom: 4px;
}

/* ---------- 图片占位 ---------- */

.page-faq .faq-figure {
  margin: clamp(28px, 4vw, 44px) 0 0;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: linear-gradient(135deg, rgba(15, 122, 75, .32), rgba(53, 196, 106, .1));
}

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

.page-faq .faq-figure figcaption {
  padding: 12px 18px 14px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

.page-faq .faq-figure--panel {
  margin: 0 0 clamp(28px, 4vw, 40px);
}

/* ---------- 问答区 ---------- */

.page-faq .faq-questions__title {
  font-family: var(--font-head);
  font-size: clamp(26px, 3.8vw, 40px);
  font-weight: 700;
  line-height: 1.14;
  color: var(--text);
  margin: 10px 0 14px;
}

.page-faq .faq-questions__lede {
  margin: 0 0 clamp(26px, 4vw, 42px);
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }
}

.page-faq .faq-rail {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--faq-card-bg);
}

@media (min-width: 900px) {
  .page-faq .faq-rail {
    position: sticky;
    top: 96px;
    padding: 22px 20px;
    border-radius: var(--r-lg);
  }
}

.page-faq .faq-rail__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--data);
}

.page-faq .faq-rail__nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-faq .faq-rail__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 10px;
  border-left: 2px solid transparent;
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  font-size: 14px;
  line-height: 1.5;
  color: var(--muted);
  text-decoration: none;
  transition: color .25s var(--ease), background-color .25s var(--ease), border-color .25s var(--ease);
}

.page-faq .faq-rail__link span {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--data);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--text);
  background: rgba(43, 240, 214, .08);
  border-left-color: var(--cyan);
}

.page-faq .faq-rail__hint {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
}

.page-faq .faq-rail__hint p {
  margin: 0 0 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-rail__hint .btn {
  width: 100%;
  justify-content: center;
}

.page-faq .faq-group {
  margin-bottom: clamp(40px, 5vw, 60px);
  scroll-margin-top: 110px;
}

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

.page-faq .faq-group__head {
  padding-bottom: 16px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--data);
  margin-bottom: 8px;
}

.page-faq .faq-group__title {
  font-family: var(--font-head);
  font-size: clamp(21px, 3vw, 27px);
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--text);
  margin: 0 0 10px;
}

.page-faq .faq-group__desc {
  margin: 0;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* ---------- 折叠问答 ---------- */

.page-faq .fold {
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: rgba(22, 32, 74, .55);
  overflow: hidden;
  transition: border-color .28s var(--ease), background-color .28s var(--ease);
}

.page-faq .fold:hover {
  border-color: var(--line-strong);
}

.page-faq .fold__head {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 16px 18px;
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.55;
  transition: color .25s var(--ease), box-shadow .25s var(--ease), background-color .25s var(--ease);
}

.page-faq .fold__idx {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--data);
  transition: color .25s var(--ease);
}

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

.page-faq .fold__head[aria-expanded="true"] {
  color: var(--cyan);
  box-shadow: inset 3px 0 0 var(--cyan);
  background: linear-gradient(90deg, rgba(43, 240, 214, .1), transparent 62%);
}

.page-faq .fold__head[aria-expanded="true"] .fold__idx {
  color: var(--cyan);
}

.page-faq .fold__icon {
  position: relative;
  flex: none;
  width: 18px;
  height: 18px;
}

.page-faq .fold__icon::before,
.page-faq .fold__icon::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 2px;
  margin-top: -1px;
  background: var(--cyan);
  transition: transform .3s var(--ease), opacity .3s var(--ease);
}

.page-faq .fold__icon::after {
  transform: rotate(90deg);
}

.page-faq .fold__head[aria-expanded="true"] .fold__icon::after {
  transform: rotate(0deg);
  opacity: 0;
}

.page-faq .fold__inner {
  padding: 2px 18px 20px 46px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .fold__inner p {
  margin: 0;
}

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

.page-faq .fold__inner .link {
  color: var(--cyan);
  text-decoration: underline;
  text-decoration-color: rgba(43, 240, 214, .4);
  text-underline-offset: 3px;
}

.page-faq .fold__inner .link:hover {
  text-decoration-color: var(--cyan);
}

/* ---------- 联系支持 ---------- */

.page-faq .faq-cta__panel {
  display: grid;
  gap: 28px;
  padding: clamp(24px, 4vw, 44px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background:
    radial-gradient(circle at 88% 12%, rgba(255, 106, 43, .16), transparent 54%),
    linear-gradient(160deg, rgba(15, 122, 75, .3), rgba(11, 18, 48, .78) 62%);
}

@media (min-width: 940px) {
  .page-faq .faq-cta__panel {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: 48px;
    align-items: start;
  }
}

.page-faq .faq-cta__title {
  font-family: var(--font-head);
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 700;
  line-height: 1.18;
  color: var(--text);
  margin: 10px 0 14px;
}

.page-faq .faq-cta__lede {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-cta__lede .link {
  color: var(--cyan);
  text-decoration: underline;
  text-decoration-color: rgba(43, 240, 214, .4);
  text-underline-offset: 3px;
}

.page-faq .faq-cta__channels {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr;
}

@media (min-width: 560px) {
  .page-faq .faq-cta__channels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-faq .faq-channel {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: rgba(11, 18, 48, .62);
}

.page-faq .faq-channel--wide {
  grid-column: 1 / -1;
  border-left: 3px solid var(--orange);
}

.page-faq .faq-channel__label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--data);
}

.page-faq .faq-channel__value {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 16px;
  letter-spacing: .02em;
  color: var(--cyan);
  word-break: break-word;
}

.page-faq .faq-channel__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-channel__note .link {
  color: var(--cyan);
  text-decoration: underline;
  text-decoration-color: rgba(43, 240, 214, .4);
  text-underline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .fold,
  .page-faq .fold__head,
  .page-faq .fold__icon::before,
  .page-faq .fold__icon::after,
  .page-faq .faq-rail__link {
    transition: none;
  }
}
<<<END>>>
</main>