/* ===== 问答中心 · 页面专属样式（全部限定在 .page-faq 作用域内） ===== */

.page-faq {
  --faq-side: 248px;
  --faq-gap: 64px;
  --faq-tint: rgba(232, 238, 245, 0.04);
  --faq-glass: rgba(18, 41, 61, 0.62);
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumbs {
  padding-top: 24px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-block: 40px 44px;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -180px;
  right: -120px;
  width: 620px;
  height: 620px;
  border-radius: 50%;
  background: radial-gradient(closest-side, rgba(63, 224, 208, 0.16), rgba(63, 224, 208, 0) 72%);
  pointer-events: none;
  z-index: 0;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: -140px;
  bottom: -240px;
  width: 480px;
  height: 480px;
  border-radius: 50%;
  background: radial-gradient(closest-side, rgba(255, 107, 44, 0.12), rgba(255, 107, 44, 0) 70%);
  pointer-events: none;
  z-index: 0;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 32px;
}

.page-faq .faq-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 7vw, 54px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--mist);
  margin: 14px 0 0;
  max-width: 15em;
}

.page-faq .faq-hero__lede {
  margin-top: 20px;
  color: var(--text-body);
  max-width: 34em;
}

.page-faq .faq-hero__facts {
  list-style: none;
  margin: 26px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 12px 30px;
}

.page-faq .faq-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 14px;
  color: var(--text-soft);
  line-height: 1.5;
}

.page-faq .faq-hero__facts .num {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.01em;
}

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

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding-block: 56px 60px;
  }

  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: 48px;
  }
}

/* ---------- 分区快捷跳转带 ---------- */
.page-faq .faq-jump {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--faq-glass);
  backdrop-filter: blur(10px);
}

.page-faq .faq-jump__inner {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-block: 14px;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-jump__label {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--grey);
  padding-right: 4px;
}

.page-faq .faq-jump__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px 7px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 14px;
  line-height: 1.4;
  color: var(--text-body);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.25s ease, color 0.25s ease, background-color 0.25s ease;
}

.page-faq .faq-jump__link .num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--cyan);
}

.page-faq .faq-jump__link:hover,
.page-faq .faq-jump__link:focus-visible {
  border-color: rgba(63, 224, 208, 0.55);
  color: var(--cyan);
  background: rgba(63, 224, 208, 0.06);
}

/* ---------- 主体：索引 + 问答 ---------- */
.page-faq .faq-body {
  padding-block: 44px 88px;
}

.page-faq .faq-body__inner {
  display: grid;
  gap: 36px;
}

/* 索引命令栏 */
.page-faq .faq-index {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--faq-glass);
  backdrop-filter: blur(10px);
  padding: 18px 16px 20px;
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--grey);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 10px;
  border-left: 2px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-soft);
  text-decoration: none;
  transition: background-color 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}

.page-faq .faq-index__link .num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--grey);
  transition: color 0.25s ease;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--mist);
  background: var(--faq-tint);
  border-left-color: var(--signal);
}

.page-faq .faq-index__link:hover .num,
.page-faq .faq-index__link:focus-visible .num {
  color: var(--cyan);
}

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

.page-faq .faq-flow {
  display: block;
  width: 100%;
  max-width: 220px;
  height: auto;
}

.page-faq .faq-index__note {
  margin: 8px 0 0;
  color: var(--grey);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
}

/* 问答分组 */
.page-faq .faq-questions {
  min-width: 0;
}

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

.page-faq .faq-group + .faq-group {
  margin-top: 56px;
}

.page-faq .faq-group__head {
  display: grid;
  gap: 6px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line-strong);
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--cyan);
  margin: 0;
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 4.4vw, 32px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--mist);
  transition: color 0.3s ease;
}

.page-faq .faq-group:target .faq-group__title {
  color: var(--cyan);
}

.page-faq .faq-group__lede {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--grey);
  max-width: 42em;
}

/* 单条问答 */
.page-faq .faq-item {
  position: relative;
  border-bottom: 1px solid var(--line);
  padding-left: 16px;
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  bottom: 18px;
  width: 2px;
  background: transparent;
  border-radius: 2px;
  transition: background-color 0.3s ease;
}

.page-faq .faq-item[open]::before {
  background: var(--signal);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 20px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2.4vw, 20px);
  line-height: 1.5;
  color: var(--mist);
  transition: color 0.25s ease;
}

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

.page-faq .faq-item__q:hover,
.page-faq .faq-item__q:focus-visible {
  color: var(--cyan);
}

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid rgba(63, 224, 208, 0.5);
  outline-offset: 2px;
}

.page-faq .faq-item__marker {
  position: relative;
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  margin-top: 7px;
}

.page-faq .faq-item__marker::before,
.page-faq .faq-item__marker::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 2px;
  margin-top: -1px;
  background: var(--cyan);
  transition: transform 0.3s ease;
}

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

.page-faq .faq-item[open] .faq-item__marker::after {
  transform: rotate(0deg);
}

.page-faq .faq-item__a {
  padding: 0 0 26px 30px;
  animation: faq-reveal 0.35s ease both;
}

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

.page-faq .faq-item__conclusion {
  margin: 0 0 12px;
  font-size: 17px;
  line-height: 1.7;
  font-weight: 600;
  color: var(--mist);
}

.page-faq .faq-item__a p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-body);
}

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

.page-faq .faq-note {
  margin-top: 14px;
  font-size: 13px;
  color: var(--grey);
}

.page-faq .faq-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px dashed rgba(63, 224, 208, 0.45);
  transition: color 0.25s ease, border-color 0.25s ease;
}

.page-faq .faq-link:hover,
.page-faq .faq-link:focus-visible {
  color: var(--white);
  border-bottom-color: var(--white);
}

/* 步骤行 */
.page-faq .faq-steps {
  list-style: none;
  counter-reset: faqstep;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-steps > li {
  counter-increment: faqstep;
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 8px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text-soft);
}

.page-faq .faq-steps > li::before {
  content: counter(faqstep, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--cyan);
  padding-top: 3px;
}

/* 内嵌配图 */
.page-faq .faq-inline-media {
  margin: 20px 0 0;
}

.page-faq .faq-inline-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

/* ---------- 桌面布局 ---------- */
@media (min-width: 1024px) {
  .page-faq .faq-body {
    padding-block: 60px 120px;
  }

  .page-faq .faq-body__inner {
    grid-template-columns: var(--faq-side) minmax(0, 1fr);
    gap: var(--faq-gap);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 88px;
    padding: 20px 18px 22px;
  }

  .page-faq .faq-group + .faq-group {
    margin-top: 72px;
  }

  .page-faq .faq-item {
    padding-left: 22px;
  }

  .page-faq .faq-item__a {
    padding-left: 36px;
    padding-bottom: 30px;
  }

  .page-faq .faq-item__a p,
  .page-faq .faq-steps > li {
    max-width: 44em;
  }
}

@media (min-width: 1400px) {
  .page-faq {
    --faq-side: 280px;
    --faq-gap: 88px;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__a {
    animation: none;
  }

  .page-faq .faq-item::before,
  .page-faq .faq-item__marker::after,
  .page-faq .faq-jump__link,
  .page-faq .faq-index__link {
    transition: none;
  }
}