.page-faq {
  --faq-index-w: 272px;
  background: var(--deep);
  color: var(--bone);
  font-family: var(--font-body);
}

.page-faq .faq-crumbs {
  padding-top: clamp(18px, 2.6vw, 32px);
  padding-bottom: clamp(14px, 2.2vw, 26px);
}

/* ===== 首屏 ===== */
.page-faq .faq-hero {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero__band {
  position: relative;
  height: clamp(104px, 16vw, 190px);
  overflow: hidden;
  background: var(--shell);
}

.page-faq .faq-hero__band img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.5) contrast(1.08) brightness(0.52);
}

.page-faq .faq-hero__band::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(52, 231, 208, 0.14) 0 1px, transparent 1px 88px),
    linear-gradient(180deg, rgba(6, 23, 38, 0.15) 0%, rgba(6, 23, 38, 0.96) 100%);
}

.page-faq .faq-hero__head {
  display: grid;
  gap: 18px;
  padding: clamp(26px, 4vw, 52px) 0 clamp(30px, 4.4vw, 58px);
}

.page-faq .faq-hero__lead {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-faq .display--l {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(42px, 9.2vw, 104px);
  line-height: 0.92;
  letter-spacing: -0.035em;
  color: var(--bone);
  transform: skewX(-3deg);
  transform-origin: left bottom;
}

.page-faq .faq-hero__note {
  display: grid;
  gap: 14px;
  align-content: end;
}

.page-faq .lede {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(14.5px, 1.5vw, 16.5px);
  line-height: 1.8;
  color: var(--soft);
}

.page-faq .faq-hero__tip {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-faq .faq-hero__tip .mono {
  color: var(--cyan);
  font-family: var(--font-mono);
  font-feature-settings: "tnum" 1;
}

/* ===== 主体骨架 ===== */
.page-faq .faq-body {
  padding: clamp(34px, 5vw, 72px) 0 clamp(60px, 8vw, 120px);
}

.page-faq .faq-body__grid {
  display: grid;
  gap: clamp(26px, 4vw, 56px);
}

/* ===== 左侧索引 ===== */
.page-faq .faq-index__inner {
  border: 1px solid var(--line);
  background-image: linear-gradient(180deg, rgba(12, 35, 56, 0.92), rgba(6, 23, 38, 0.92));
  padding: 18px 16px 20px;
}

.page-faq .faq-index__label {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-index__list li + li {
  border-top: 1px solid var(--line);
}

.page-faq .faq-index__list a {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  padding: 12px 6px;
  text-decoration: none;
  color: var(--soft);
  font-size: 14px;
  line-height: 1.3;
  border-left: 2px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease, transform 0.18s ease;
}

.page-faq .faq-index__list a:hover {
  color: var(--bone);
  border-left-color: var(--lava);
  background-color: rgba(255, 90, 31, 0.06);
  transform: translateY(-2px);
}

.page-faq .faq-index__list a:focus-visible,
.page-faq .faq-card__head:focus-visible {
  outline: 2px solid var(--lava);
  outline-offset: 2px;
}

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

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

.page-faq .faq-index__count {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--mist);
}

.page-faq .faq-index__foot {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist);
}

/* ===== 右侧问答 ===== */
.page-faq .faq-answers {
  min-width: 0;
}

.page-faq .faq-sec + .faq-sec {
  margin-top: clamp(40px, 5.5vw, 84px);
}

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

.page-faq .faq-sec__num {
  padding-top: 5px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--lava);
}

.page-faq .faq-sec__meta {
  display: grid;
  gap: 6px;
  min-width: 0;
}

.page-faq .faq-sec__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--bone);
  transform: skewX(-3deg);
  transform-origin: left center;
}

.page-faq .faq-sec__desc {
  margin: 0;
  max-width: 62ch;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}

/* ===== 折叠问答卡 ===== */
.page-faq .faq-list {
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-faq .faq-card {
  display: block;
  position: relative;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  transition: background-color 0.2s ease;
}

.page-faq .faq-card:last-child {
  border-bottom: 0;
}

.page-faq .faq-card::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--lava);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform 0.22s ease;
  pointer-events: none;
}

.page-faq .faq-card:hover::before,
.page-faq .faq-card[open]::before {
  transform: scaleY(1);
}

.page-faq .faq-card[open] {
  background: #0E2A41;
}

.page-faq .faq-card__head {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) 18px;
  align-items: center;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  transition: background-color 0.18s ease;
}

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

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

.page-faq .faq-card__head:hover {
  background-color: rgba(52, 231, 208, 0.05);
}

.page-faq .faq-card__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  transition: color 0.18s ease;
}

.page-faq .faq-card[open] .faq-card__idx {
  color: var(--lava);
}

.page-faq .faq-card__title {
  font-size: 15px;
  font-weight: 500;
  line-height: 1.55;
  color: var(--bone);
}

.page-faq .faq-card__sign {
  position: relative;
  justify-self: end;
  width: 14px;
  height: 14px;
}

.page-faq .faq-card__sign::before,
.page-faq .faq-card__sign::after {
  content: "";
  position: absolute;
  background-color: var(--mist);
  transition: transform 0.22s ease, background-color 0.22s ease;
}

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

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

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

.page-faq .faq-card[open] .faq-card__sign::before {
  background-color: var(--lava);
}

.page-faq .faq-card__body {
  padding: 14px 18px 18px 18px;
  border-top: 1px solid var(--line);
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--soft);
}

.page-faq .faq-card__body p {
  margin: 0;
  max-width: 68ch;
}

.page-faq .faq-card__body .link-arrow {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(52, 231, 208, 0.4);
}

.page-faq .faq-card__body .link-arrow:hover {
  color: var(--lava);
  border-bottom-color: var(--lava);
}

.page-faq .faq-card__body .link-arrow:focus-visible {
  outline: 2px solid var(--lava);
  outline-offset: 2px;
}

@keyframes faq-card-in {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-faq .faq-card[open] .faq-card__body {
  animation: faq-card-in 0.2s ease-out;
}

/* ===== 数据区的辅助图形 ===== */
.page-faq .faq-sec__content {
  display: grid;
  gap: 22px;
}

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

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  filter: saturate(0.7) contrast(1.05);
}

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  padding-left: 10px;
  border-left: 2px solid var(--cyan);
  font-size: 12px;
  line-height: 1.65;
  letter-spacing: 0.03em;
  color: var(--mist);
}

/* ===== 区块 04 行动提示 ===== */
.page-faq .faq-callout {
  position: relative;
  display: grid;
  gap: 20px;
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--line);
  background: var(--panel);
  overflow: hidden;
}

.page-faq .faq-callout::after {
  content: "";
  position: absolute;
  right: -44px;
  bottom: -44px;
  width: 180px;
  height: 180px;
  background-image: radial-gradient(circle, rgba(255, 90, 31, 0.18), transparent 68%);
  pointer-events: none;
}

.page-faq .faq-callout__lead {
  position: relative;
  margin: 0;
  max-width: 64ch;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--soft);
}

.page-faq .faq-callout__actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ===== 入视口点亮 ===== */
@keyframes faq-lit {
  from {
    opacity: 0.25;
  }
  to {
    opacity: 1;
  }
}

.page-faq .faq-sec.is-lit {
  animation: faq-lit 0.32s ease-out both;
}

/* ===== 响应式 ===== */
@media (min-width: 640px) {
  .page-faq .faq-card__body {
    padding: 14px 18px 18px 72px;
  }
}

@media (min-width: 720px) {
  .page-faq .faq-hero__head {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: end;
    gap: clamp(24px, 4vw, 64px);
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-body__grid {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index__inner {
    position: sticky;
    top: 32px;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-sec--data .faq-sec__content {
    grid-template-columns: minmax(0, 1fr) 244px;
    gap: clamp(20px, 3vw, 38px);
    align-items: start;
  }

  .page-faq .faq-sec--data .faq-figure {
    position: sticky;
    top: 32px;
  }

  .page-faq .faq-callout {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: clamp(24px, 4vw, 48px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-card[open] .faq-card__body,
  .page-faq .faq-sec.is-lit {
    animation: none;
  }

  .page-faq .faq-card__head,
  .page-faq .faq-card::before,
  .page-faq .faq-index__list a {
    transition: none;
  }

  .page-faq .faq-index__list a:hover {
    transform: none;
  }
}