.page-faq {
  --faq-rule: rgba(214, 207, 194, 0.16);
  --faq-rule-strong: rgba(214, 207, 194, 0.34);
  --faq-pad-x: clamp(12px, 1.6vw, 20px);
  --faq-idx-w: 56px;
  --faq-gap: 12px;
}

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

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-block: clamp(26px, 4.6vw, 56px) clamp(24px, 3.8vw, 46px);
  border-bottom: 1px solid var(--faq-rule);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 84% 10%, rgba(61, 242, 208, 0.12), transparent 46%),
    linear-gradient(118deg, rgba(19, 38, 58, 0) 42%, rgba(19, 38, 58, 0.82) 100%);
  pointer-events: none;
}

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

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.2vw, 44px);
  margin-top: clamp(18px, 2.6vw, 32px);
}

.page-faq .faq-hero h1 {
  margin: 12px 0 0;
  max-width: 20ch;
  font-family: var(--font-display);
  font-size: clamp(30px, 6.2vw, 56px);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-faq .faq-hero__lede {
  margin: 18px 0 0;
  max-width: 60ch;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--body-dim);
}

.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 30px;
  margin: 26px 0 0;
  padding: 16px 0 0;
  border-top: 1px solid var(--faq-rule);
  list-style: none;
}

.page-faq .faq-hero__facts li {
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--muted);
}

.page-faq .faq-hero__facts .mono {
  margin-right: 6px;
  font-size: 15px;
  color: var(--cyan);
}

.page-faq .faq-hero__figure {
  margin: 0;
}

/* ---------- 通用图框 ---------- */
.page-faq .faq-frame {
  position: relative;
  display: block;
  overflow: hidden;
  border: 1px solid var(--faq-rule-strong);
  background: var(--ink-2);
}

.page-faq .faq-frame--4x3 {
  aspect-ratio: 4 / 3;
}

.page-faq .faq-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-faq .faq-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 22, 34, 0) 55%, rgba(10, 22, 34, 0.72) 100%);
  pointer-events: none;
}

/* ---------- 分组标签条 ---------- */
.page-faq .faq-tabs {
  border-block: 1px solid var(--faq-rule);
  background: var(--ink-2);
}

.page-faq .faq-tabs__inner {
  display: flex;
  gap: 6px;
  padding: 10px var(--pad);
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-tab {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--faq-rule);
  border-bottom-width: 2px;
  border-bottom-color: transparent;
  font-size: 14px;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--t-fast) ease, background var(--t-fast) ease, border-color var(--t-fast) ease;
}

.page-faq .faq-tab__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
}

.page-faq .faq-tab:hover,
.page-faq .faq-tab:focus-visible {
  color: var(--white);
  background: var(--ink-3);
  border-color: var(--faq-rule-strong);
}

.page-faq .faq-tab--now {
  color: var(--white);
  border-bottom-color: var(--signal);
}

.page-faq .faq-tab--now .faq-tab__idx {
  color: var(--signal);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  padding-block: clamp(40px, 6vw, 82px);
  border-top: 1px solid var(--faq-rule);
  scroll-margin-top: 24px;
}

.page-faq .faq-group:first-of-type {
  border-top: 0;
}

.page-faq .faq-group__head {
  max-width: 760px;
  margin-bottom: clamp(22px, 3vw, 38px);
}

.page-faq .faq-group__head h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(23px, 3.4vw, 34px);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: -0.015em;
  color: var(--white);
}

.page-faq .faq-group__intro {
  margin: 12px 0 0;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--body-dim);
}

/* ---------- 问答列表 ---------- */
.page-faq .faq-list {
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-item {
  position: relative;
  border-bottom: 1px solid var(--faq-rule);
  transition: background var(--t-base) ease;
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--cyan);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform var(--t-base) ease;
}

.page-faq .faq-item:hover,
.page-faq .faq-item:focus-within {
  background: rgba(19, 38, 58, 0.55);
}

.page-faq .faq-item:hover::before,
.page-faq .faq-item:focus-within::before {
  transform: scaleY(1);
}

.page-faq .faq-item__q {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-faq .faq-item__btn {
  display: grid;
  grid-template-columns: var(--faq-idx-w) minmax(0, 1fr) 22px;
  align-items: start;
  gap: var(--faq-gap);
  width: 100%;
  margin: 0;
  padding: clamp(16px, 2.1vw, 24px) var(--faq-pad-x);
  border: 0;
  background: none;
  color: var(--white);
  font: inherit;
  text-align: left;
  cursor: pointer;
}

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

.page-faq .faq-item__idx {
  padding-top: 3px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

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

.page-faq .faq-item__text {
  font-size: clamp(16px, 1.9vw, 18px);
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: -0.008em;
}

.page-faq .faq-item__btn .disclosure__sign {
  justify-self: end;
  margin-top: 3px;
}

.page-faq .faq-item__a {
  padding: 0 var(--faq-pad-x) clamp(20px, 2.6vw, 30px);
  max-width: 74ch;
  font-size: 15.5px;
  line-height: 1.88;
  color: var(--body-dim);
}

.page-faq .faq-item__a p {
  margin: 0 0 12px;
}

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

.page-faq .faq-item__a ul {
  margin: 4px 0 12px;
  padding-left: 18px;
  list-style: none;
}

.page-faq .faq-item__a li {
  position: relative;
  margin-bottom: 8px;
}

.page-faq .faq-item__a li::before {
  content: "";
  position: absolute;
  left: -18px;
  top: 0.72em;
  width: 7px;
  height: 1px;
  background: var(--cyan);
}

/* ---------- 刷新章节侧栏 ---------- */
.page-faq .faq-refresh__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 40px);
  align-items: start;
}

.page-faq .faq-refresh__aside {
  margin: 0;
}

.page-faq .faq-refresh__cap {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-pulse {
  display: block;
  width: 100%;
  max-width: 320px;
  height: auto;
  margin: 14px 0 0;
}

/* ---------- 暖纸分组 ---------- */
.page-faq .faq-group--paper {
  background: var(--paper);
  border-top-color: rgba(214, 207, 194, 0.3);
}

.page-faq .faq-group--paper .eyebrow {
  color: var(--teal);
}

.page-faq .faq-group--paper .faq-group__head h2 {
  color: var(--ink);
}

.page-faq .faq-group--paper .faq-group__intro {
  color: #44576B;
}

.page-faq .faq-group--paper .faq-list {
  border-top-color: rgba(10, 22, 34, 0.2);
}

.page-faq .faq-group--paper .faq-item {
  border-bottom-color: rgba(10, 22, 34, 0.2);
}

.page-faq .faq-group--paper .faq-item:hover,
.page-faq .faq-group--paper .faq-item:focus-within {
  background: rgba(10, 22, 34, 0.045);
}

.page-faq .faq-group--paper .faq-item::before {
  background: var(--teal);
}

.page-faq .faq-group--paper .faq-item__btn {
  color: var(--ink);
}

.page-faq .faq-group--paper .faq-item__btn:focus-visible {
  outline-color: var(--teal);
}

.page-faq .faq-group--paper .faq-item__idx {
  color: rgba(10, 22, 34, 0.48);
}

.page-faq .faq-group--paper .faq-item__btn[aria-expanded="true"] .faq-item__idx {
  color: var(--teal);
}

.page-faq .faq-group--paper .faq-item__a {
  color: #33475C;
}

.page-faq .faq-group--paper .faq-item__a li::before {
  background: var(--teal);
}

.page-faq .faq-group--paper .faq-item__a .mono {
  color: var(--signal);
}

/* ---------- 收尾 ---------- */
.page-faq .faq-outro {
  border-top: 1px solid var(--faq-rule);
  padding-block: clamp(40px, 6vw, 78px);
  background:
    linear-gradient(102deg, rgba(14, 140, 126, 0.14) 0%, rgba(10, 22, 34, 0) 62%),
    var(--ink-2);
}

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

.page-faq .faq-outro__copy h2 {
  margin: 10px 0 0;
  color: var(--white);
}

.page-faq .faq-outro__copy p {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--body-dim);
}

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

.page-faq .faq-outro__links {
  grid-column: 1 / -1;
  margin: 0;
  padding-top: 18px;
  border-top: 1px solid var(--faq-rule);
  font-size: 13px;
  color: var(--muted);
}

.page-faq .faq-outro__links a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(61, 242, 208, 0.35);
}

.page-faq .faq-outro__links a:hover,
.page-faq .faq-outro__links a:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ---------- 响应式 ---------- */
@media (min-width: 768px) {
  .page-faq .faq-item__a {
    padding-left: calc(var(--faq-pad-x) + var(--faq-idx-w) + var(--faq-gap));
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-faq .faq-hero__figure {
    margin-top: 26px;
  }

  .page-faq .faq-tabs__inner {
    padding-inline: max(var(--pad), calc((100vw - var(--maxw)) / 2 + var(--pad)));
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-refresh__body {
    grid-template-columns: minmax(0, 1fr) minmax(260px, 340px);
  }

  .page-faq .faq-refresh__aside {
    position: sticky;
    top: 24px;
  }

  .page-faq .faq-outro__inner {
    grid-template-columns: minmax(0, 1fr) auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item::before,
  .page-faq .faq-tab {
    transition: none;
  }
}