.page-faq {
  --faq-ink-2: #0E141C;
  background: var(--color-void);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  padding: clamp(20px, 3vw, 40px) var(--gutter) clamp(64px, 8vw, 104px);
  overflow-x: hidden;
}

.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

/* 面包屑 */
.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 clamp(28px, 4vw, 40px);
  font-size: 13px;
  color: var(--color-muted);
}

.page-faq .breadcrumb a {
  color: var(--color-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .16s ease, border-color .16s ease;
}

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

.page-faq .breadcrumb__sep {
  color: var(--color-line);
}

.page-faq .breadcrumb__here {
  color: var(--color-text);
}

/* 首屏 */
.page-faq .faq-hero {
  display: grid;
  gap: clamp(28px, 4vw, 44px);
  padding-bottom: clamp(36px, 5vw, 56px);
  border-bottom: 1px solid var(--color-line);
}

.page-faq .faq-hero__eyebrow {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--color-cyan);
}

.page-faq .faq-hero h1 {
  margin: 0 0 20px;
  font-size: clamp(30px, 4.8vw, 56px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--color-text);
  max-width: 22ch;
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-muted);
}

.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  background: var(--color-line);
  border: 1px solid var(--color-line);
}

.page-faq .faq-hero__stat {
  background: var(--color-void);
  padding: 14px 16px 16px;
}

.page-faq .faq-hero__stat b {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 500;
  line-height: 1.15;
  color: var(--color-cyan);
}

.page-faq .faq-hero__stat span {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--color-muted);
}

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

.page-faq .faq-hero__figure .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

@media (min-width: 560px) {
  .page-faq .faq-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: end;
  }
}

/* 主体与右栏目录 */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(36px, 5vw, 56px);
  margin-top: clamp(44px, 6vw, 76px);
}

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

@media (min-width: 1100px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 1fr) 208px;
    gap: 72px;
    align-items: start;
  }
}

.page-faq .faq-rail {
  border-top: 1px solid var(--color-line);
  padding-top: 14px;
}

.page-faq .faq-rail__title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--color-muted);
}

.page-faq .faq-rail__list {
  display: flex;
  flex-wrap: nowrap;
  gap: 16px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
}

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

.page-faq .faq-rail__list a {
  display: block;
  padding-bottom: 2px;
  font-size: 13px;
  white-space: nowrap;
  color: var(--color-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .16s ease, border-color .16s ease;
}

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

@media (max-width: 1099px) {
  .page-faq .faq-rail {
    order: -1;
  }
}

@media (min-width: 1100px) {
  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--topbar-h) + 24px);
    border-top: 0;
    border-left: 1px solid var(--color-line);
    padding: 2px 0 0 20px;
  }

  .page-faq .faq-rail__list {
    display: block;
    overflow: visible;
  }

  .page-faq .faq-rail__list li + li {
    margin-top: 12px;
  }
}

/* 章节通用 */
.page-faq .faq-section {
  margin: 0 0 clamp(56px, 7.5vw, 92px);
  scroll-margin-top: calc(var(--topbar-h) + 28px);
}

.page-faq .faq-main > .faq-section:last-child {
  margin-bottom: 0;
}

.page-faq .faq-section__head {
  max-width: 64ch;
  margin-bottom: clamp(22px, 3vw, 32px);
}

.page-faq .faq-section__head .eyebrow {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--color-cyan);
}

.page-faq .faq-section__head h2 {
  margin: 0 0 12px;
  font-size: clamp(22px, 2.8vw, 34px);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -.02em;
  color: var(--color-text);
}

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

/* 分类索引带 */
.page-faq .faq-index {
  display: grid;
  gap: 1px;
  background: var(--color-line);
  border: 1px solid var(--color-line);
}

.page-faq .faq-index__item {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 170px;
  padding: 26px 22px 22px;
  background: var(--color-panel);
  color: var(--color-text);
  text-decoration: none;
  transition: background .18s ease;
}

.page-faq .faq-index__item::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 2px;
  background: var(--color-cyan);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform .22s ease;
}

.page-faq .faq-index__item:hover,
.page-faq .faq-index__item:focus-visible {
  background: var(--faq-ink-2);
  outline: none;
}

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

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

.page-faq .faq-index__title {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -.01em;
  color: var(--color-text);
}

.page-faq .faq-index__desc {
  flex: 1 1 auto;
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-muted);
}

.page-faq .faq-index__meta {
  padding-top: 10px;
  border-top: 1px solid var(--color-line);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-muted);
}

@media (min-width: 900px) {
  .page-faq .faq-index {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .page-faq .faq-index__item--install { grid-column: span 5; }
  .page-faq .faq-index__item--assets { grid-column: span 4; }
  .page-faq .faq-index__item--security { grid-column: span 3; }
  .page-faq .faq-index__item--dev { grid-column: span 7; }
  .page-faq .faq-index__item--trouble { grid-column: span 5; }
}

/* 折叠问答 */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--topbar-h) + 28px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(34px, 4vw, 46px);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-line);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--color-text);
}

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

.page-faq .faq-group:target .faq-group__head {
  border-bottom-color: var(--color-cyan);
}

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

.page-faq .fold {
  border-bottom: 1px solid var(--color-line);
}

.page-faq .fold__summary {
  position: relative;
  display: block;
  padding: 18px 46px 18px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--color-text);
  border-left: 2px solid transparent;
  transition: background .16s ease, border-color .16s ease;
}

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

.page-faq .fold__summary::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 16px;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--color-cyan);
}

.page-faq .fold[open] > .fold__summary::after {
  content: "–";
}

.page-faq .fold__summary:hover,
.page-faq .fold__summary:focus-visible {
  background: rgba(23, 225, 214, .05);
  border-left-color: var(--color-cyan);
  outline: none;
}

.page-faq .fold[open] > .fold__summary {
  border-left-color: var(--color-cyan);
}

.page-faq .fold__body {
  padding: 0 22px 22px 20px;
  border-left: 2px solid var(--color-line);
}

.page-faq .fold__body p {
  max-width: 62ch;
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--color-muted);
}

.page-faq .fold__body p:first-child {
  color: var(--color-text);
}

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

.page-faq .fold__body strong {
  font-weight: 700;
  color: var(--color-text);
}

/* 仓库位置卡 */
.page-faq .repo-grid {
  display: grid;
  gap: clamp(20px, 3vw, 28px);
}

.page-faq .repo-grid .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

@media (min-width: 880px) {
  .page-faq .repo-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
    gap: 40px;
    align-items: start;
  }
}

.page-faq .repo-panel {
  padding: 26px 24px 24px;
  background: var(--color-panel);
  border: 1px solid var(--color-line);
}

.page-faq .repo-panel__label {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--color-amber);
}

.page-faq .repo-panel__path {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-cyan);
  word-break: break-word;
}

.page-faq .repo-panel__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-muted);
}

.page-faq .repo-modules {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--color-line);
}

.page-faq .repo-modules li {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-line);
  font-size: 14px;
  line-height: 1.7;
}

.page-faq .repo-modules li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .repo-modules__k {
  flex: 0 0 auto;
  min-width: 112px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-cyan);
}

.page-faq .repo-modules__v {
  flex: 1 1 180px;
  color: var(--color-muted);
}

/* 问题提交 */
.page-faq .submit-list {
  display: grid;
  gap: 16px;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
}

.page-faq .submit-list li {
  padding: 2px 0 2px 16px;
  border-left: 2px solid var(--color-cyan);
  font-size: 14px;
  line-height: 1.78;
  color: var(--color-muted);
}

.page-faq .submit-list b {
  display: block;
  margin-bottom: 4px;
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text);
}

.page-faq .submit-foot {
  padding: 22px 24px;
  background: var(--color-panel);
  border: 1px solid var(--color-line);
  border-left: 2px solid var(--color-amber);
}

.page-faq .submit-foot p {
  max-width: 64ch;
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.78;
  color: var(--color-muted);
}

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

.page-faq .submit-foot a {
  color: var(--color-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(23, 225, 214, .4);
  transition: color .16s ease, border-color .16s ease;
}

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

@media (min-width: 760px) {
  .page-faq .submit-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 32px;
  }
}

/* 术语对照表 */
.page-faq .table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-line);
}

.page-faq .data-table {
  width: 100%;
  min-width: 540px;
  border-collapse: collapse;
}

.page-faq .data-table th,
.page-faq .data-table td {
  padding: 14px 16px;
  text-align: left;
  vertical-align: top;
  font-size: 14px;
  line-height: 1.75;
}

.page-faq .data-table thead th {
  background: var(--color-panel);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .14em;
  color: var(--color-muted);
  white-space: nowrap;
  border-bottom: 1px solid var(--color-line);
}

.page-faq .data-table tbody th {
  width: 132px;
  font-family: var(--font-mono);
  font-weight: 500;
  white-space: nowrap;
  color: var(--color-cyan);
  border-bottom: 1px solid var(--color-line);
}

.page-faq .data-table tbody td {
  color: var(--color-muted);
  border-bottom: 1px solid var(--color-line);
}

.page-faq .data-table tbody tr:last-child th,
.page-faq .data-table tbody tr:last-child td {
  border-bottom: 0;
}

/* 动效降级 */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__item,
  .page-faq .faq-index__item::before,
  .page-faq .fold__summary,
  .page-faq .breadcrumb a,
  .page-faq .faq-rail__list a,
  .page-faq .submit-foot a {
    transition: none;
  }

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