.page-faq {
  --faq-rule: rgba(242, 237, 228, .14);
  --faq-rule-soft: rgba(242, 237, 228, .08);
  --faq-rule-strong: rgba(242, 237, 228, .30);
  --faq-index-w: 3;
  background: var(--navy);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  background:
    linear-gradient(160deg, rgba(62, 143, 138, .10) 0%, rgba(14, 30, 51, 0) 46%),
    var(--navy);
  border-bottom: 1px solid var(--faq-rule);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 58%;
  height: 100%;
  background: linear-gradient(118deg, rgba(193, 135, 60, .16), rgba(193, 135, 60, 0) 72%);
  clip-path: polygon(34% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  position: relative;
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(18px, 3vw, 30px) var(--pad-inline) clamp(40px, 6vw, 84px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 44px);
}

.page-faq .faq-hero__crumb {
  grid-column: 1 / -1;
}

.page-faq .faq-hero__lede {
  min-width: 0;
}

.page-faq .faq-hero__lede h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--step-h1);
  line-height: 1.14;
  letter-spacing: -.03em;
  color: var(--ink);
  max-width: 20ch;
}

.page-faq .faq-hero__lede .lead {
  margin: 20px 0 0;
  max-width: 46ch;
  color: var(--ink-soft);
}

.page-faq .faq-hero__lede > .faq-note {
  max-width: 44ch;
}

.page-faq .faq-hero__figure {
  margin: 0;
  border: 1px solid var(--faq-rule-strong);
  background: var(--navy-deep);
  min-width: 0;
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-faq .faq-hero__figure figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--faq-rule);
  font-size: var(--step-note);
  line-height: 1.6;
  font-style: italic;
  color: var(--cool);
}

.page-faq .faq-hero__facts {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--faq-rule);
  border: 1px solid var(--faq-rule);
}

.page-faq .faq-hero__facts li {
  background: var(--navy);
  padding: 14px 16px 16px;
  display: flex;
  flex-direction: column-reverse;
  gap: 6px;
  min-width: 0;
}

.page-faq .faq-fact__v {
  font-family: var(--font-mono);
  font-size: 26px;
  line-height: 1.1;
  color: var(--copper);
  letter-spacing: -.01em;
}

.page-faq .faq-fact__k {
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--ink-mute);
}

/* ---------- 横贯条 ---------- */

.page-faq .faq-band {
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-band__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px 18px;
}

.page-faq .faq-band__list li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-left: 14px;
  border-left: 1px solid rgba(74, 82, 89, .45);
  min-width: 0;
}

.page-faq .faq-band__num {
  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--navy-deep);
}

.page-faq .faq-band__label {
  font-size: 13px;
  letter-spacing: .03em;
  color: var(--stone);
}

/* ---------- 主体双栏 ---------- */

.page-faq .faq-body {
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(36px, 5vw, 72px) var(--pad-inline) clamp(48px, 7vw, 96px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 4vw, 56px);
  align-items: start;
}

/* 索引栏 */

.page-faq .faq-index {
  min-width: 0;
  border: 1px solid var(--faq-rule);
  padding: 18px 16px 16px;
  background: rgba(7, 19, 36, .5);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  border-left: 1px solid var(--faq-rule);
}

.page-faq .faq-index__list a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  min-height: 44px;
  padding: 10px 12px;
  margin-left: -1px;
  border-left: 2px solid transparent;
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 15px;
  line-height: 1.4;
  transition: color .12s ease-out, border-color .12s ease-out, background-color .12s ease-out;
}

.page-faq .faq-index__list a:hover {
  color: var(--ink);
  border-left-color: var(--copper);
  background: rgba(193, 135, 60, .07);
}

.page-faq .faq-index__list a:focus-visible {
  outline: 1px solid var(--seal);
  outline-offset: 2px;
  color: var(--ink);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--copper);
  letter-spacing: .04em;
}

.page-faq .faq-index__text {
  min-width: 0;
}

.page-faq .faq-index__foot {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--faq-rule-soft);
  font-size: 12.5px;
  font-style: italic;
  line-height: 1.65;
  color: var(--cool);
}

/* 问答流 */

.page-faq .faq-stream {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: clamp(38px, 5vw, 64px);
}

.page-faq .faq-group {
  min-width: 0;
  scroll-margin-top: 96px;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding-top: 14px;
  border-top: 2px solid var(--faq-rule-strong);
}

.page-faq .faq-group__no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--copper);
  flex: none;
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--step-h2);
  line-height: 1.22;
  letter-spacing: -.022em;
  color: var(--ink);
  min-width: 0;
}

.page-faq .faq-group__intro {
  margin: 14px 0 22px;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--ink-mute);
}

.page-faq .faq-group__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

.page-faq .faq-group__col {
  min-width: 0;
}

.page-faq .faq-group__figure {
  margin: 0;
  border: 1px solid var(--faq-rule);
  background: var(--navy-deep);
  min-width: 0;
  align-self: start;
}

.page-faq .faq-group__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.page-faq .faq-group__figure figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--faq-rule);
  font-size: var(--step-note);
  font-style: italic;
  line-height: 1.65;
  color: var(--cool);
}

/* ---------- 折叠条目 ---------- */

.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-item:first-of-type {
  border-top: 1px solid var(--faq-rule-soft);
}

.page-faq .faq-item summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 14px;
  align-items: baseline;
  min-height: 44px;
  padding: 16px 0 16px 2px;
  cursor: pointer;
  list-style: none;
  transition: color .12s ease-out;
}

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

.page-faq .faq-item summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--copper);
  transform: translateY(-1px);
}

.page-faq .faq-item[open] summary::after {
  content: "–";
}

.page-faq .faq-item summary:hover .faq-item__text {
  color: var(--copper-hi);
}

.page-faq .faq-item summary:focus-visible {
  outline: 1px solid var(--seal);
  outline-offset: 2px;
}

.page-faq .faq-item__num {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--teal);
  flex: none;
}

.page-faq .faq-item__text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.5;
  letter-spacing: -.012em;
  color: var(--ink);
  min-width: 0;
  transition: color .12s ease-out;
}

.page-faq .faq-item__a {
  padding: 0 0 22px 2px;
  animation: faq-reveal .12s ease-out both;
}

.page-faq .faq-item__a p {
  margin: 0 0 14px;
  max-width: 68ch;
  font-size: var(--step-body);
  line-height: 1.75;
  color: var(--ink-soft);
}

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

@keyframes faq-reveal {
  from {
    opacity: 0;
    transform: translateY(-2px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-faq .faq-note {
  display: block;
  font-family: var(--font-body);
  font-style: italic;
  font-size: var(--step-note);
  line-height: 1.65;
  color: var(--cool);
}

.page-faq .faq-note a {
  color: var(--copper);
  text-decoration: none;
  border-bottom: 1px solid var(--copper-line);
}

.page-faq .faq-note a:hover {
  color: var(--copper-hi);
}

.page-faq .faq-note a:focus-visible {
  outline: 1px solid var(--seal);
  outline-offset: 2px;
}

/* 电脑端步骤 */

.page-faq .faq-steps {
  list-style: none;
  margin: 18px 0 14px;
  padding: 0;
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-steps li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  min-height: 40px;
  padding: 9px 0;
  border-bottom: 1px solid var(--faq-rule);
  font-size: 15.5px;
  color: var(--ink-soft);
}

.page-faq .faq-steps__no {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--copper);
  border: 1px solid var(--copper-line);
  width: 26px;
  height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* ---------- 结尾 ---------- */

.page-faq .faq-cta {
  border-top: 1px solid var(--faq-rule);
  background:
    linear-gradient(90deg, rgba(166, 37, 43, .13) 0%, rgba(7, 19, 36, 0) 42%),
    var(--navy-deep);
}

.page-faq .faq-cta__inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(36px, 5vw, 72px) var(--pad-inline) clamp(42px, 6vw, 84px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-faq .faq-cta__inner h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--step-h2);
  letter-spacing: -.022em;
  line-height: 1.2;
  color: var(--ink);
}

.page-faq .faq-cta__inner p {
  margin: 0;
  max-width: 58ch;
  font-size: var(--step-body);
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 10px;
}

/* ---------- 断点 ---------- */

@media (min-width: 640px) {
  .page-faq .faq-band__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    column-gap: clamp(28px, 4vw, 64px);
    align-items: end;
  }

  .page-faq .faq-hero__crumb {
    grid-column: 1 / -1;
  }

  .page-faq .faq-hero__figure {
    align-self: stretch;
  }

  .page-faq .faq-body {
    grid-template-columns: minmax(210px, 3fr) minmax(0, 8fr);
    column-gap: clamp(32px, 4vw, 72px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-group__layout {
    grid-template-columns: minmax(0, 5fr) minmax(0, 4fr);
    column-gap: clamp(24px, 3vw, 44px);
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-item summary {
    grid-template-columns: 52px minmax(0, 1fr) auto;
  }

  .page-faq .faq-item__a {
    padding-left: 54px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__a {
    animation: none;
  }

  .page-faq .faq-index__list a,
  .page-faq .faq-item summary,
  .page-faq .faq-item__text {
    transition: none;
  }
}
<<<END>>>