.page-community {
  --cm-slant: 16px;
  --cm-toc-height: 58px;
  display: block;
  background: var(--color-surface);
}

/* ---------- Hero ---------- */
.page-community .cm-hero {
  position: relative;
  padding-block: var(--space-4) var(--space-8);
  background: linear-gradient(168deg, var(--color-surface-alt) 0%, var(--color-surface) 46%, var(--color-surface) 100%);
  border-bottom: var(--border-thick) solid var(--color-ink);
}

.page-community .cm-hero__head {
  max-width: var(--container);
}

.page-community .cm-kicker {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--color-accent);
  text-transform: uppercase;
}

.page-community .cm-hero__title {
  margin: var(--space-2) 0 var(--space-3);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-display);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  text-wrap: balance;
}

.page-community .cm-hero__lede {
  max-width: var(--measure);
  margin: 0;
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 首屏看板 ---------- */
.page-community .cm-board {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-6);
  align-items: start;
}

.page-community .cm-slab {
  position: relative;
  padding: calc(var(--space-4) + var(--cm-slant)) var(--space-4) calc(var(--space-4) + var(--cm-slant));
  transition: transform 160ms linear;
}

.page-community .cm-slab--primary {
  background: var(--color-primary);
  color: var(--color-primary-ink);
  clip-path: polygon(0 0, 100% var(--cm-slant), 100% 100%, 0 calc(100% - var(--cm-slant)));
}

.page-community .cm-slab--deep {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  clip-path: polygon(0 var(--cm-slant), 100% 0, 100% calc(100% - var(--cm-slant)), 0 100%);
}

.page-community .cm-slab--mid {
  padding-inline: 0;
  padding-block: 0;
}

.page-community .cm-slab--primary:hover,
.page-community .cm-slab--deep:hover {
  transform: translate(-4px, 4px);
}

.page-community .cm-slab__label {
  margin: 0 0 var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: 0.86;
}

.page-community .cm-slab__label--deep {
  color: var(--color-contrast-accent);
  opacity: 1;
}

.page-community .cm-rules {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: cmr;
}

.page-community .cm-rules li {
  counter-increment: cmr;
  position: relative;
  padding-left: var(--space-4);
  padding-block: var(--space-2);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  border-top: 1px solid color-mix(in srgb, var(--color-primary-ink) 36%, transparent);
}

.page-community .cm-rules li:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-community .cm-rules li::before {
  content: counter(cmr, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  opacity: 0.7;
}

.page-community .cm-rules li:first-child::before {
  top: 0;
}

.page-community .cm-mid__note {
  margin: 0 0 var(--space-3);
  padding-left: var(--space-3);
  border-left: var(--border-thick) solid var(--color-primary);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-community .cm-stats {
  display: grid;
  gap: 0;
}

.page-community .cm-stat {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  padding-block: var(--space-2);
  border-top: 1px solid var(--color-contrast-line);
}

.page-community .cm-stat:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-community .cm-stat__num {
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  line-height: 1;
  color: var(--color-contrast-accent);
  min-width: 2ch;
  text-align: right;
}

.page-community .cm-stat__key {
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
  opacity: 0.86;
}

.page-community .cm-stats__note {
  margin: var(--space-3) 0 0;
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
  opacity: 0.7;
}

/* ---------- 图片展签 ---------- */
.page-community .cm-shot {
  position: relative;
  margin: 0;
  background: var(--color-contrast-surface);
  border: var(--border-thick) solid var(--color-ink);
  overflow: hidden;
}

.page-community .cm-shot img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-community .cm-shot--hero img {
  aspect-ratio: 4 / 3;
}

.page-community .cm-shot--flow img {
  aspect-ratio: 10 / 7;
}

.page-community .cm-shot--topics img {
  aspect-ratio: 12 / 7;
}

.page-community .cm-shot__tag {
  position: absolute;
  left: 0;
  bottom: 0;
  margin: 0;
  padding: var(--space-1) var(--space-2);
  background: var(--color-accent);
  color: var(--color-accent-ink);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
}

/* ---------- 吸顶目录 ---------- */
.page-community .cm-toc {
  position: sticky;
  top: 0;
  z-index: 12;
  background: var(--color-accent);
  color: var(--color-accent-ink);
  border-bottom: var(--border-thick) solid var(--color-ink);
}

.page-community .cm-toc__inner {
  display: flex;
  gap: var(--space-1);
  padding-block: var(--space-2);
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-community .cm-toc__link {
  flex: 0 0 auto;
  display: grid;
  grid-template-columns: auto auto;
  grid-template-rows: auto auto;
  column-gap: var(--space-1);
  row-gap: 6px;
  align-items: center;
  padding: var(--space-1) var(--space-2);
  border: 1px solid color-mix(in srgb, var(--color-accent-ink) 44%, transparent);
  border-radius: var(--radius-sm);
  color: inherit;
  text-decoration: none;
  font-size: var(--text-sm);
  transition: background-color 160ms linear, color 160ms linear, transform 160ms linear;
}

.page-community .cm-toc__link:hover,
.page-community .cm-toc__link:focus-visible {
  background: var(--color-accent-ink);
  color: var(--color-accent);
  transform: translateY(-2px);
}

.page-community .cm-toc__no {
  font-size: var(--text-xs);
  opacity: 0.76;
}

.page-community .cm-toc__name {
  white-space: nowrap;
  font-weight: var(--weight-heading);
}

.page-community .cm-toc__bar {
  grid-column: 1 / -1;
  display: block;
  height: 3px;
  background: currentColor;
  opacity: 0.62;
  width: calc(var(--n, 1) / 3 * 100%);
  transition: opacity 160ms linear;
}

.page-community .cm-toc__link:hover .cm-toc__bar {
  opacity: 1;
}

/* ---------- 区块头 ---------- */
.page-community .cm-sechead {
  margin-bottom: var(--space-4);
  padding-top: var(--space-2);
  border-top: var(--border-thick) solid var(--color-ink);
  position: relative;
}

.page-community .cm-sechead::before {
  content: "";
  position: absolute;
  top: calc(-1 * var(--border-thick));
  left: 0;
  width: 96px;
  height: var(--border-thick);
  background: var(--color-primary);
}

.page-community .cm-sechead__title {
  margin: var(--space-2) 0 var(--space-2);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-community .cm-sechead__lede {
  max-width: var(--measure);
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 问答主体 ---------- */
.page-community .cm-body {
  padding-block: var(--section-y);
}

.page-community .cm-group {
  padding-block: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-line);
  scroll-margin-top: calc(var(--cm-toc-height) + var(--space-2));
}

.page-community .cm-group:first-of-type {
  border-top: var(--border-thick) solid var(--color-ink);
}

.page-community .cm-group__head {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.page-community .cm-group__no {
  flex: 0 0 auto;
  padding: 2px var(--space-1);
  background: var(--color-primary);
  color: var(--color-primary-ink);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
}

.page-community .cm-group__title {
  flex: 1 1 auto;
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-community .cm-group__count {
  flex: 0 0 auto;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-community .cm-qa {
  border-top: 1px solid var(--color-line);
}

.page-community .cm-qa__item {
  border-bottom: 1px solid var(--color-line);
}

.page-community .cm-qa__q {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-1);
  cursor: pointer;
  list-style: none;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  letter-spacing: -0.012em;
  color: var(--color-ink);
  transition: color 160ms linear, transform 160ms linear, background-color 160ms linear;
}

.page-community .cm-qa__q::-webkit-details-marker {
  display: none;
}

.page-community .cm-qa__q:hover {
  color: var(--color-accent);
  transform: translateX(2px);
}

.page-community .cm-qa__item[open] .cm-qa__q {
  color: var(--color-ink);
}

.page-community .cm-qa__idx {
  flex: 0 0 auto;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-community .cm-qa__text {
  flex: 1 1 auto;
}

.page-community .cm-qa__mark {
  flex: 0 0 auto;
  color: var(--color-accent);
  font-size: var(--text-sm);
  transition: transform 160ms linear;
}

.page-community .cm-qa__item[open] .cm-qa__mark {
  transform: rotate(45deg);
}

.page-community .cm-qa__a {
  max-width: var(--measure);
  padding: 0 var(--space-2) var(--space-3) calc(var(--space-4) + 3ch);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-community .cm-qa__a p {
  margin: 0 0 var(--space-2);
}

.page-community .cm-qa__a p:last-child {
  margin-bottom: 0;
}

.page-community .cm-qa__a a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: text-decoration-thickness 160ms linear;
}

.page-community .cm-qa__a a:hover {
  text-decoration-thickness: 3px;
}

.page-community .cm-callout {
  padding-left: var(--space-3);
  border-left: var(--border-thick) solid var(--color-primary);
  color: var(--color-ink);
  font-weight: var(--weight-heading);
}

/* ---------- 勘误流程 ---------- */
.page-community .cm-flow {
  padding-block: var(--section-y);
  background: var(--color-surface-alt);
  border-top: var(--border-thick) solid var(--color-ink);
  border-bottom: var(--border-thick) solid var(--color-ink);
}

.page-community .cm-flow__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  align-items: start;
}

.page-community .cm-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--border-thick) solid var(--color-ink);
}

.page-community .cm-steps > li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-3);
  padding-block: var(--space-3);
  border-bottom: 1px solid var(--color-line);
  transition: background-color 160ms linear;
}

.page-community .cm-steps > li:hover {
  background: var(--color-highlight);
}

.page-community .cm-steps__no {
  align-self: start;
  padding: var(--space-1);
  background: var(--color-primary);
  color: var(--color-primary-ink);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  line-height: 1;
}

.page-community .cm-steps__title {
  margin: 0 0 var(--space-1);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  letter-spacing: -0.012em;
  color: var(--color-ink);
}

.page-community .cm-steps p {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-community .cm-steps a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.page-community .cm-steps a:hover {
  text-decoration-thickness: 3px;
}

/* ---------- 常见话题 ---------- */
.page-community .cm-topics {
  padding-block: var(--section-y);
  background: var(--color-surface);
}

.page-community .cm-topics__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
  align-items: start;
}

.page-community .cm-topics__list {
  list-style: none;
  margin: var(--space-3) 0 0;
  padding: 0;
  border-top: 1px solid var(--color-line);
}

.page-community .cm-topics__list li {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  padding-block: var(--space-2);
  border-bottom: 1px solid var(--color-line);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
  transition: background-color 160ms linear, padding-left 160ms linear;
}

.page-community .cm-topics__list li:hover {
  background: var(--color-primary-soft);
  padding-left: var(--space-2);
}

.page-community .cm-topics__dot {
  flex: 0 0 auto;
  width: var(--space-1);
  height: var(--space-1);
  background: var(--color-primary);
  transform: rotate(45deg);
}

.page-community .cm-topics__foot {
  max-width: var(--measure);
  margin: var(--space-3) 0 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-community .cm-topics__foot a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.page-community .cm-topics__foot a:hover {
  text-decoration-thickness: 3px;
}

/* ---------- 焦点可见性 ---------- */
.page-community a:focus-visible,
.page-community summary:focus-visible {
  outline: var(--border-thin) solid var(--color-focus);
  outline-offset: 2px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-community .cm-flow__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-community .cm-topics__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
  }
}

@media (min-width: 960px) {
  .page-community .cm-board {
    grid-template-columns: minmax(0, 4fr) minmax(0, 4fr) minmax(0, 3fr);
    gap: var(--space-3);
  }

  .page-community .cm-hero__title {
    margin-bottom: var(--space-4);
  }

  .page-community .cm-group__head {
    gap: var(--space-3);
  }
}

@media (min-width: 1220px) {
  .page-community .cm-board {
    gap: var(--space-4);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-community .cm-slab,
  .page-community .cm-toc__link,
  .page-community .cm-toc__bar,
  .page-community .cm-qa__q,
  .page-community .cm-qa__mark,
  .page-community .cm-steps > li,
  .page-community .cm-topics__list li {
    transition: none;
  }

  .page-community .cm-slab--primary:hover,
  .page-community .cm-slab--deep:hover,
  .page-community .cm-toc__link:hover,
  .page-community .cm-qa__q:hover {
    transform: none;
  }
}

.page-community {
  --n: 1rem;
}