.page-community {
  --cm-band-tall: calc(var(--space-8) * 5);
}

/* ---------- 首屏 ---------- */
.page-community .cm-hero {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  overflow: hidden;
  padding-bottom: var(--section-y);
}

.page-community .cm-hero__inner {
  padding-top: var(--space-6);
}

.page-community .cm-hero .breadcrumb {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.12em;
  color: var(--color-contrast-ink);
  opacity: 0.72;
  margin-bottom: var(--space-6);
}

.page-community .cm-hero .breadcrumb a {
  color: var(--color-contrast-ink);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}

.page-community .cm-hero .breadcrumb a:hover,
.page-community .cm-hero .breadcrumb a:focus-visible {
  color: var(--color-contrast-accent);
  border-bottom-color: var(--color-contrast-accent);
}

.page-community .cm-hero .slash {
  margin: 0 var(--space-1);
  opacity: 0.55;
}

.page-community .cm-hero__head {
  padding-block: var(--space-4) var(--space-6);
}

.page-community .cm-hero__kicker {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.2em;
  color: var(--color-contrast-accent);
}

.page-community .cm-hero__title {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-display);
  line-height: 1;
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
  transform: skewX(-2deg);
  transform-origin: left bottom;
}

.page-community .cm-hero__lede {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.84;
}

/* 四条竖向反色色带 */
.page-community .cm-bands {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  align-items: end;
  gap: var(--space-1);
  height: var(--cm-band-tall);
  max-width: var(--container);
  margin: var(--space-6) auto 0;
  padding: 0 var(--space-2);
}

.page-community .cm-band {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-6) var(--space-2) var(--space-3);
  clip-path: polygon(0 0, 100% 10%, 100% 100%, 0 100%);
}

.page-community .cm-band:nth-child(1) { height: 76%; }
.page-community .cm-band:nth-child(2) { height: 100%; }
.page-community .cm-band:nth-child(3) { height: 84%; }
.page-community .cm-band:nth-child(4) { height: 92%; }

.page-community .cm-band--primary {
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-community .cm-band--accent {
  background: var(--color-accent);
  color: var(--color-accent-ink);
}

.page-community .cm-band__no {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.2em;
  opacity: 0.85;
}

.page-community .cm-band__name {
  writing-mode: vertical-rl;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: 1.2;
  letter-spacing: 0.28em;
}

/* 首屏大号数字 */
.page-community .cm-hero__figures {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-6);
  margin-top: var(--space-6);
}

.page-community .cm-figure {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.page-community .cm-figure__num {
  font-family: var(--font-mono);
  font-weight: var(--weight-heading);
  font-size: var(--text-figure);
  line-height: 1;
  color: var(--color-contrast-accent);
}

.page-community .cm-figure__label {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.16em;
  color: var(--color-contrast-ink);
  opacity: 0.78;
}

/* ---------- 通用节标题 ---------- */
.page-community .cm-sect-head {
  max-width: var(--measure);
  margin-bottom: var(--space-6);
}

.page-community .cm-sect-head .kicker {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.18em;
  color: var(--color-ink-soft);
}

.page-community .cm-sect-head .kicker::before {
  content: "";
  width: 16px;
  height: 16px;
  background: var(--color-primary);
  flex: none;
}

.page-community .cm-sect-head h2 {
  margin: 0 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-sect-head__note {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-community .cm-sect-head--on-contrast h2 {
  color: var(--color-contrast-ink);
}

.page-community .cm-sect-head--on-contrast .kicker {
  color: var(--color-contrast-ink);
  opacity: 0.8;
}

.page-community .cm-sect-head--on-contrast .kicker::before {
  background: var(--color-contrast-accent);
}

.page-community .cm-sect-head--on-contrast .cm-sect-head__note {
  color: var(--color-contrast-ink);
  opacity: 0.78;
}

/* ---------- 四组锚点 ---------- */
.page-community .cm-index {
  background: var(--color-surface);
  padding-block: var(--section-y);
}

.page-community .cm-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-1);
}

.page-community .cm-index__item a {
  display: block;
  height: 100%;
  padding: var(--space-3) var(--space-2);
  background: var(--color-surface-alt);
  color: var(--color-ink);
  text-decoration: none;
  transition: background 160ms linear;
}

.page-community .cm-index__item a:hover,
.page-community .cm-index__item a:focus-visible {
  background: var(--color-primary-soft);
}

.page-community .cm-index__item a:focus-visible {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: -2px;
}

.page-community .cm-index__no {
  display: block;
  margin-bottom: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.2em;
  color: var(--color-primary);
}

.page-community .cm-index__name {
  display: block;
  margin-bottom: var(--space-1);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: 1.25;
}

.page-community .cm-index__when {
  display: block;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 问答正文 ---------- */
.page-community .cm-qa {
  background: var(--color-surface);
  padding-block: var(--section-y-lg) var(--section-y);
}

.page-community .cm-qa__group + .cm-qa__group {
  margin-top: var(--space-8);
}

.page-community .cm-group-head {
  display: grid;
  gap: var(--space-1);
  margin-bottom: var(--space-4);
  max-width: var(--measure);
}

.page-community .cm-group-head__no {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.24em;
  color: var(--color-accent);
}

.page-community .cm-group-head__title {
  margin: 0;
  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-group-head__note {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
}

.page-community .cm-qa__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.page-community .cm-qa__item {
  display: grid;
  grid-template-columns: 3fr 4fr;
  gap: var(--space-2);
  align-items: stretch;
}

.page-community .cm-qa__rule {
  margin: 0;
  display: flex;
  align-items: flex-start;
  gap: var(--space-1);
  padding: var(--space-2);
  background: var(--color-primary);
  color: var(--color-primary-ink);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  line-height: 1.45;
}

.page-community .cm-qa__idx {
  flex: none;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: var(--weight-body);
  letter-spacing: 0.1em;
  opacity: 0.78;
  padding-top: 0.25em;
}

.page-community .cm-qa__body {
  display: grid;
  gap: var(--space-2);
  padding: var(--space-2);
  background: var(--color-surface-alt);
}

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

.page-community .cm-qa__key {
  display: block;
  margin-bottom: calc(var(--space-1) / 2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  color: var(--color-ink-muted);
}

.page-community .cm-qa__key--accent {
  color: var(--color-accent);
}

/* ---------- 讨论主题矩阵 ---------- */
.page-community .cm-topics {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding-block: var(--section-y-lg);
}

.page-community .cm-topics__fig {
  margin: 0 0 var(--space-6);
}

.page-community .cm-tagmatrix {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-1);
}

.page-community .cm-topic a {
  display: grid;
  gap: var(--space-1);
  height: 100%;
  padding: var(--space-3) var(--space-2);
  border: var(--border-thin) solid var(--color-contrast-line);
  color: var(--color-contrast-ink);
  text-decoration: none;
  transition: background 160ms linear, border-color 160ms linear;
}

.page-community .cm-topic a:hover,
.page-community .cm-topic a:focus-visible {
  background: color-mix(in srgb, var(--color-contrast-accent) 16%, transparent);
  border-color: var(--color-contrast-accent);
}

.page-community .cm-topic a:focus-visible {
  outline: var(--border-thick) solid var(--color-contrast-accent);
  outline-offset: -2px;
}

.page-community .cm-topic__name {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: 1.25;
}

.page-community .cm-topic__hint {
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.78;
}

.page-community .cm-topic__to {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-contrast-accent);
}

/* ---------- 引用规范 ---------- */
.page-community .cm-quote {
  background: var(--color-surface);
  padding-block: var(--section-y);
}

.page-community .cm-split {
  display: grid;
  grid-template-columns: 4fr 3fr;
  gap: var(--space-6);
  align-items: start;
}

.page-community .cm-split__text .kicker {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.18em;
  color: var(--color-ink-soft);
}

.page-community .cm-split__text .kicker::before {
  content: "";
  width: 16px;
  height: 16px;
  background: var(--color-accent);
  flex: none;
}

.page-community .cm-split__text h2 {
  margin: 0 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-split__lead {
  margin: 0 0 var(--space-4);
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-community .cm-quote__list {
  margin: 0;
  display: grid;
  gap: var(--space-1);
}

.page-community .cm-quote__row {
  display: grid;
  grid-template-columns: 22% 1fr;
  gap: var(--space-2);
  padding: var(--space-2);
  background: var(--color-surface-deep);
}

.page-community .cm-quote__row dt {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  color: var(--color-accent);
}

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

.page-community .cm-split__fig {
  margin: 0;
  position: sticky;
  top: var(--space-4);
}

/* ---------- 反馈闭环 ---------- */
.page-community .cm-feedback {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding-block: var(--section-y);
}

.page-community .cm-feedback__stage {
  position: relative;
  overflow: hidden;
  margin-bottom: var(--space-4);
}

.page-community .cm-feedback__bg {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 260px;
  object-fit: cover;
}

.page-community .cm-feedback__scrim {
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
}

.page-community .cm-flow {
  position: absolute;
  inset: 0;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-1);
  align-items: stretch;
}

.page-community .cm-flow__node {
  display: grid;
  align-content: start;
  gap: var(--space-1);
  padding: var(--space-4) var(--space-2);
  background: color-mix(in srgb, var(--color-contrast-surface) 82%, transparent);
}

.page-community .cm-flow__no {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.24em;
  color: var(--color-contrast-accent);
}

.page-community .cm-flow__title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: 1.2;
  color: var(--color-contrast-ink);
}

.page-community .cm-flow__node p {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.88;
}

.page-community .cm-feedback__outro {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.86;
}

.page-community .cm-feedback__outro a {
  color: var(--color-contrast-accent);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-contrast-accent);
}

.page-community .cm-feedback__outro a:hover,
.page-community .cm-feedback__outro a:focus-visible {
  border-bottom-width: var(--border-thick);
}

.page-community .cm-feedback__outro a:focus-visible {
  outline: var(--border-thick) solid var(--color-contrast-accent);
  outline-offset: 2px;
}

/* ---------- 窄屏 ---------- */
@media (max-width: 900px) {
  .page-community .cm-split {
    grid-template-columns: 1fr;
  }

  .page-community .cm-split__fig {
    position: static;
  }

  .page-community .cm-index__list {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-community .cm-qa__item {
    grid-template-columns: 1fr;
  }

  .page-community .cm-quote__row {
    grid-template-columns: 1fr;
    gap: var(--space-1);
  }
}

@media (max-width: 760px) {
  .page-community .cm-bands {
    grid-template-columns: 1fr;
    height: auto;
    gap: var(--space-1);
  }

  .page-community .cm-band:nth-child(1),
  .page-community .cm-band:nth-child(2),
  .page-community .cm-band:nth-child(3),
  .page-community .cm-band:nth-child(4) {
    height: auto;
  }

  .page-community .cm-band {
    flex-direction: row-reverse;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-2);
    clip-path: polygon(0 0, 100% 26%, 100% 100%, 0 100%);
  }

  .page-community .cm-band__name {
    writing-mode: horizontal-tb;
    font-size: var(--text-base);
    letter-spacing: 0.1em;
  }

  .page-community .cm-hero__figures {
    gap: var(--space-4);
  }

  .page-community .cm-tagmatrix {
    grid-template-columns: 1fr;
  }

  .page-community .cm-index__list {
    grid-template-columns: 1fr;
  }

  .page-community .cm-feedback__stage {
    display: grid;
  }

  .page-community .cm-feedback__bg {
    min-height: 0;
    height: 160px;
  }

  .page-community .cm-flow {
    position: static;
    grid-template-columns: 1fr;
    padding: var(--space-2) 0 0;
  }

  .page-community .cm-flow__node {
    background: var(--color-contrast-surface);
    padding: var(--space-3) var(--space-2);
  }
}