.page-faq {
  --faq-body-text: #C8D6E2;
  --faq-accent: var(--cyan);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: clamp(28px, 4vw, 48px) 0 clamp(36px, 5vw, 68px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-faq .faq-hero__kicker {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 0 0 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-hero__kicker::after {
  content: "";
  flex: 0 1 auto;
  width: clamp(40px, 14vw, 180px);
  height: 1px;
  background: var(--line);
}

.page-faq .faq-hero__title {
  margin: 0;
  font-family: var(--font-body);
  font-weight: 300;
  font-size: clamp(32px, 6.2vw, 72px);
  line-height: 1.06;
  letter-spacing: -0.015em;
  color: var(--paper);
  max-width: 20ch;
}

.page-faq .faq-hero__lead {
  margin: clamp(20px, 3vw, 32px) 0 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px 20px;
  margin: clamp(32px, 4vw, 56px) 0 0;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-fact {
  margin: 0;
  min-width: 0;
}

.page-faq .faq-fact__num {
  display: block;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(30px, 3.6vw, 46px);
  line-height: 1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}

.page-faq .faq-fact:nth-child(2) .faq-fact__num { color: var(--green); }
.page-faq .faq-fact:nth-child(3) .faq-fact__num { color: var(--orange); }
.page-faq .faq-fact:nth-child(4) .faq-fact__num { color: var(--paper); }

.page-faq .faq-fact__label {
  display: block;
  margin: 10px 0 0;
  font-size: 12px;
  line-height: 1.5;
  color: var(--muted);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  padding: clamp(44px, 6vw, 88px) 0 clamp(64px, 8vw, 120px);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
}

/* ---------- 左侧分组索引 ---------- */
.page-faq .faq-index {
  border-top: 2px solid var(--cyan);
  padding-top: 16px;
  min-width: 0;
}

.page-faq .faq-index__title {
  margin: 0;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 22px;
}

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

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 5px 0;
  font-size: 14px;
  line-height: 1.4;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-index__link:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

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

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  flex: 0 0 auto;
}

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

.page-faq .faq-group {
  --faq-accent: var(--cyan);
}

.page-faq .faq-group:nth-child(4n+2) { --faq-accent: var(--orange); }
.page-faq .faq-group:nth-child(4n+3) { --faq-accent: var(--green); }

.page-faq .faq-group + .faq-group {
  margin-top: clamp(44px, 5vw, 80px);
}

.page-faq .faq-group__head {
  position: relative;
  padding: 0 0 18px 20px;
  border-bottom: 1px solid var(--line-strong);
}

.page-faq .faq-group__head::before {
  content: "";
  position: absolute;
  left: 0;
  top: 3px;
  width: 3px;
  height: 32px;
  background: var(--faq-accent);
}

.page-faq .faq-group__num {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--faq-accent);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: clamp(20px, 2.4vw, 30px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-group__desc {
  margin: 10px 0 0;
  max-width: 58ch;
  font-size: 14px;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 20px 0;
  cursor: pointer;
  list-style: none;
  color: var(--paper);
  font-size: clamp(15px, 1.3vw, 17px);
  line-height: 1.55;
  transition: color var(--dur) var(--ease);
}

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

.page-faq .faq-item__q::marker {
  content: "";
}

.page-faq .faq-item__q:hover {
  color: var(--faq-accent);
}

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

.page-faq .faq-item__mark {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  margin-top: 8px;
  border-right: 1.5px solid var(--faq-accent);
  border-bottom: 1.5px solid var(--faq-accent);
  transform: rotate(-45deg);
  transition: transform var(--dur) var(--ease);
}

.page-faq .faq-item[open] .faq-item__mark {
  transform: rotate(-135deg);
}

.page-faq .faq-item__a {
  padding: 0 0 24px 22px;
  max-width: 66ch;
}

.page-faq .faq-item__a p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--faq-body-text);
}

.page-faq .faq-item__a p + p {
  margin-top: 12px;
}

.page-faq .faq-item__a a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-item__a a:hover {
  color: var(--paper);
}

.page-faq .faq-item__fig {
  margin: 18px 0 4px;
}

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

.page-faq .faq-item__fig .img-frame__caption {
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--muted);
}

@keyframes faq-reveal-in {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: no-preference) {
  .page-faq .faq-item[open] .faq-item__a {
    animation: faq-reveal-in 180ms cubic-bezier(0.2, 0, 0, 1);
  }
}

/* ---------- 中小屏 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 28px 24px;
  }

  .page-faq .faq-item__a {
    padding-left: 34px;
  }
}

/* ---------- 桌面两栏 ---------- */
@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 72px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-faq .faq-index__list {
    display: block;
    margin-top: 20px;
  }

  .page-faq .faq-index__item + .page-faq-index__item {
    margin-top: 0;
  }

  .page-faq .faq-index__link {
    font-size: 13px;
    padding: 7px 0;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-layout {
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 96px;
  }
}
<<<END>>>