.page-faq {
  --faq-rail-w: 236px;
  --faq-flow-gap: clamp(20px, 3vw, 34px);
  display: block;
}

/* ---------- 首屏框景 ---------- */
.page-faq .faq-hero {
  padding: clamp(28px, 5vw, 56px) 0 clamp(40px, 6vw, 72px);
  background: linear-gradient(180deg, var(--white) 0%, var(--mist) 100%);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero__inner {
  position: relative;
  background: var(--white);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  box-shadow: var(--shadow-stack);
  padding: clamp(22px, 4.4vw, 48px);
}

.page-faq .faq-hero__inner::before,
.page-faq .faq-hero__inner::after {
  content: "";
  position: absolute;
  height: 3px;
  width: 72px;
}

.page-faq .faq-hero__inner::before {
  top: -1px;
  left: -1px;
  background: var(--saffron);
}

.page-faq .faq-hero__inner::after {
  right: -1px;
  bottom: -1px;
  background: var(--indigo);
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-size: clamp(28px, 5.2vw, 52px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.18;
  color: var(--indigo);
  max-width: 20em;
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 44em;
  font-size: clamp(16px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--ink);
}

.page-faq .faq-hero__stats {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: clamp(16px, 2.4vw, 22px) 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 14px 20px;
}

.page-faq .faq-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.page-faq .faq-hero__stats .mono {
  font-family: var(--font-mono);
  font-size: clamp(16px, 2.2vw, 21px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--saffron);
}

.page-faq .faq-hero__stats li > span:last-child {
  font-size: 13px;
  color: var(--grey);
  letter-spacing: 0.02em;
}

/* ---------- 通用章节节奏 ---------- */
.page-faq .faq-section {
  padding: clamp(48px, 8vw, 92px) 0;
}

.page-faq .faq-section--mist {
  background: var(--mist);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-section--last {
  padding-bottom: clamp(56px, 9vw, 108px);
}

.page-faq .faq-section__head {
  max-width: 760px;
  margin-bottom: clamp(22px, 3.4vw, 38px);
}

.page-faq .faq-section__intro {
  margin: 14px 0 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--grey);
}

/* ---------- 分类总览 ---------- */
.page-faq .faq-fig {
  margin: 0 0 clamp(22px, 3.2vw, 34px);
}

.page-faq .faq-cats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-faq .faq-cat {
  position: relative;
  background: var(--white);
  border: 1px solid var(--line);
  border-left: 3px solid var(--indigo);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  padding: 18px 18px 20px;
  transition: transform 0.24s var(--ease-panel), border-left-color 0.24s var(--ease-panel);
}

.page-faq .faq-cat:hover {
  transform: translateY(-2px);
  border-left-color: var(--saffron);
}

.page-faq .faq-cat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--grey);
}

.page-faq .faq-cat__name {
  margin: 9px 0 7px;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--indigo);
}

.page-faq .faq-cat p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--grey);
}

/* ---------- 检索与筛选 ---------- */
.page-faq .faq-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-flow-gap);
}

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

.page-faq .faq-split__text {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink);
}

.page-faq .faq-keywords {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-keywords .tag {
  display: inline-block;
  padding: 5px 11px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--indigo);
  background: var(--white);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
}

.page-faq .faq-split__meta {
  margin: 22px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.75;
  color: var(--grey);
}

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

/* ---------- 分类 rail + 折叠问答流 ---------- */
.page-faq .faq-flow {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-flow-gap);
}

.page-faq .faq-rail {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 14px 16px;
}

.page-faq .faq-rail__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--grey);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-rail__list li {
  flex: 0 0 auto;
}

.page-faq .faq-rail__link {
  display: block;
  padding: 8px 13px;
  font-size: 14px;
  line-height: 1.5;
  white-space: nowrap;
  color: var(--indigo);
  text-decoration: none;
  background: var(--white);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  transition: background 0.2s var(--ease-panel), color 0.2s var(--ease-panel),
    border-color 0.2s var(--ease-panel);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  background: var(--indigo);
  border-color: var(--indigo);
  color: var(--white);
}

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

.page-faq .faq-rail__note {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.68;
  color: var(--grey);
}

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

.page-faq .faq-group {
  margin-bottom: clamp(24px, 4vw, 40px);
}

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

.page-faq .faq-group__title {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line-strong);
  font-size: 19px;
  font-weight: 600;
  color: var(--indigo);
}

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

/* ---------- 折叠问答 ---------- */
.page-faq .faq-item {
  position: relative;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
  overflow: hidden;
  transition: border-color 0.2s var(--ease-panel);
}

.page-faq .faq-item:hover {
  border-color: var(--line-strong);
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 2px;
  background: transparent;
  transition: background 0.2s var(--ease-panel);
}

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

.page-faq .faq-item > summary {
  position: relative;
  cursor: pointer;
  list-style: none;
  padding: 16px 46px 16px 20px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink);
  transition: color 0.2s var(--ease-panel);
}

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

.page-faq .faq-item > summary::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 20px;
  width: 8px;
  height: 8px;
  border-right: 1.5px solid var(--grey);
  border-bottom: 1.5px solid var(--grey);
  transform: translateY(-70%) rotate(45deg);
  transition: transform 0.24s var(--ease-panel), border-color 0.2s var(--ease-panel);
}

.page-faq .faq-item[open] > summary::after {
  transform: translateY(-30%) rotate(-135deg);
  border-color: var(--saffron);
}

.page-faq .faq-item > summary:hover {
  color: var(--link);
}

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

.page-faq .faq-item__body {
  padding: 0 20px 18px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--grey);
}

.page-faq .faq-item__body p {
  margin: 0 0 10px;
}

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

.page-faq .faq-item__body a {
  color: var(--link);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 版本适配答疑 ---------- */
.page-faq .faq-versions {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
}

.page-faq .faq-versions li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-versions__q {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--indigo);
}

.page-faq .faq-versions__a {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--grey);
}

/* ---------- 自助排查步骤 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-faq .faq-step {
  position: relative;
  background: var(--mist);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 18px 18px 20px;
}

.page-faq .faq-step__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  margin-bottom: 12px;
  border-radius: var(--radius-sm);
  background: var(--indigo);
  color: var(--white);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1;
}

.page-faq .faq-step h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--indigo);
}

.page-faq .faq-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--grey);
}

.page-faq .faq-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  margin-top: clamp(22px, 3vw, 32px);
  padding-top: clamp(18px, 2.6vw, 26px);
  border-top: 1px solid var(--line);
}

.page-faq .faq-links .link-arrow {
  font-size: 15px;
}

/* ---------- 仍未解决 ---------- */
.page-faq .faq-help {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  background: var(--indigo);
  color: var(--white);
  border-radius: var(--radius);
  border: 1px solid var(--indigo-soft);
  box-shadow: var(--shadow-stack);
  padding: clamp(26px, 4.4vw, 48px);
  overflow: hidden;
}

.page-faq .faq-help::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(
    90deg,
    var(--saffron) 0 20%,
    var(--amber) 20% 40%,
    var(--turquoise) 40% 60%,
    var(--link) 60% 80%,
    var(--white) 80% 100%
  );
  opacity: 0.9;
}

.page-faq .faq-help__eyebrow {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--amber);
}

.page-faq .faq-help__title {
  margin: 12px 0 0;
  font-size: clamp(22px, 3.4vw, 30px);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.3;
  color: var(--white);
}

.page-faq .faq-help__desc {
  margin: 14px 0 0;
  max-width: 46em;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.78);
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-start;
}

.page-faq .faq-help__actions .btn {
  white-space: nowrap;
}

/* ---------- 响应式 ---------- */
@media (min-width: 600px) {
  .page-faq .faq-cats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-versions li {
    grid-template-columns: minmax(0, 280px) minmax(0, 1fr);
    gap: 26px;
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

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

  .page-faq .faq-help {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-flow {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    align-items: start;
  }

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

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 2px;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-faq .faq-rail__list li {
    flex: 1 1 auto;
    min-width: 0;
  }

  .page-faq .faq-rail__link {
    white-space: normal;
    background: transparent;
    border: 1px solid transparent;
    border-left: 2px solid transparent;
    border-radius: 0;
    padding: 8px 10px;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-cat,
  .page-faq .faq-item,
  .page-faq .faq-item::before,
  .page-faq .faq-item > summary::after,
  .page-faq .faq-rail__link {
    transition: none;
  }

  .page-faq .faq-cat:hover {
    transform: none;
  }
}