.page-features .cap-crumb {
  padding-top: var(--space-4);
}

.page-features .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-features .breadcrumb li {
  display: inline-flex;
  align-items: center;
}

.page-features .breadcrumb li + li::before {
  content: "/";
  margin-inline: var(--space-1);
  color: var(--color-line);
}

.page-features .breadcrumb a {
  color: var(--color-ink-soft);
  text-decoration: none;
  transition: color 160ms ease;
}

.page-features .breadcrumb a:hover,
.page-features .breadcrumb a:focus-visible {
  color: var(--color-accent);
}

/* ---------- 首屏 ---------- */

.page-features .cap-hero {
  padding-block: var(--space-6) var(--section-y-lg);
}

.page-features .cap-hero__grid {
  display: grid;
  gap: var(--space-6);
}

.page-features .cap-hero__title {
  margin: var(--space-3) 0 0;
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  overflow-wrap: break-word;
}

.page-features .cap-hero__lead {
  margin-top: var(--space-4);
  max-width: var(--measure);
  color: var(--color-ink-soft);
}

.page-features .cap-figures {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin: 0;
  padding: 0;
}

.page-features .cap-figure {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  min-width: 0;
}

.page-features .cap-figure .figure {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: var(--weight-heading);
  line-height: 1;
  color: var(--color-accent);
  transition: color 160ms ease;
}

.page-features .cap-figure:hover .figure {
  color: var(--color-focus);
}

.page-features .cap-figure__label {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-features .cap-band__label {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
}

.page-features .cap-band .band-track {
  display: flex;
  gap: var(--space-2);
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  scroll-snap-type: x proximity;
  padding-bottom: var(--space-2);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-features .cap-band .band-item {
  flex: none;
  scroll-snap-align: start;
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  color: var(--color-ink-soft);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 160ms ease, color 160ms ease, background-color 160ms ease;
}

.page-features .cap-band .band-item:hover,
.page-features .cap-band .band-item:focus-visible {
  border-color: var(--color-accent);
  background: var(--color-primary-soft);
  color: var(--color-ink);
}

.page-features .cap-band .band-idx {
  color: var(--color-primary);
}

/* ---------- 分组外壳 ---------- */

.page-features .cap-group {
  padding-block: var(--section-y);
}

.page-features .cap-group--alt {
  background: var(--color-surface-alt);
}

.page-features .cap-group__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.page-features .cap-group__head-text {
  max-width: var(--measure);
}

.page-features .cap-group__title {
  margin: var(--space-2) 0 0;
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-features .cap-group__note {
  margin: var(--space-3) 0 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-features details.cap-group > summary {
  list-style: none;
  cursor: pointer;
}

.page-features details.cap-group > summary::-webkit-details-marker {
  display: none;
}

.page-features details.cap-group > summary:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: var(--space-1);
}

.page-features .cap-fold {
  position: relative;
  flex: none;
  width: var(--space-3);
  height: var(--space-3);
  margin-top: var(--space-1);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  transition: border-color 160ms ease;
}

.page-features details[open] > summary .cap-fold {
  border-color: var(--color-accent);
}

.page-features .cap-fold::before,
.page-features .cap-fold::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--color-ink-muted);
  transition: opacity 160ms ease, background-color 160ms ease;
}

.page-features .cap-fold::before {
  width: var(--space-2);
  height: var(--border-thin);
}

.page-features .cap-fold::after {
  width: var(--border-thin);
  height: var(--space-2);
}

.page-features details[open] > summary .cap-fold::before {
  background: var(--color-accent);
}

.page-features details[open] > summary .cap-fold::after {
  opacity: 0;
}

.page-features .cap-group__body {
  display: grid;
  gap: var(--space-6);
}

/* ---------- 媒体块 ---------- */

.page-features .cap-media {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
}

.page-features .cap-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-features .cap-media[data-ratio="wide"] {
  aspect-ratio: 16 / 9;
}

.page-features .cap-media[data-ratio="square"] {
  aspect-ratio: 3 / 2;
}

.page-features .cap-media .media-body {
  position: absolute;
  inset: auto 0 0 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-4) var(--space-3) var(--space-3);
  background: var(--overlay-scrim);
  color: var(--color-contrast-ink);
}

.page-features .cap-media .media-kicker {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-contrast-accent);
}

.page-features .cap-media .media-title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
}

/* ---------- 能力条目 ---------- */

.page-features .cap-grid {
  display: grid;
  gap: var(--space-4);
}

.page-features .cap-entry {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-3);
  padding-block: var(--space-3) var(--space-4);
  border-top: var(--border-thin) solid var(--color-line);
  scroll-margin-top: 130px;
  transition: border-color 160ms ease;
}

.page-features .cap-entry:hover,
.page-features .cap-entry:target {
  border-color: var(--color-accent);
}

.page-features .cap-entry__idx {
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: 1;
  color: var(--color-ink-muted);
  transition: color 160ms ease;
}

.page-features .cap-entry:hover .cap-entry__idx,
.page-features .cap-entry:focus-within .cap-entry__idx {
  color: var(--color-accent);
}

.page-features .cap-entry__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-features .cap-entry__desc {
  margin: var(--space-2) 0 0;
  max-width: 48ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-features .cap-meta {
  margin: var(--space-3) 0 0;
  display: grid;
  gap: var(--space-2);
}

.page-features .cap-meta > div {
  display: grid;
  grid-template-columns: 5em minmax(0, 1fr);
  gap: var(--space-2);
  align-items: baseline;
}

.page-features .cap-meta dt {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  white-space: nowrap;
}

.page-features .cap-meta dd {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.62;
  color: var(--color-ink-soft);
}

/* ---------- 能力边界（亮底对比区块） ---------- */

.page-features .cap-boundary {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-block: var(--section-y);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-features .cap-boundary__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.34;
  pointer-events: none;
}

.page-features .cap-boundary__inner {
  position: relative;
  z-index: 1;
}

.page-features .cap-boundary__eyebrow {
  color: var(--color-contrast-accent);
}

.page-features .cap-boundary__title {
  margin: var(--space-2) 0 0;
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-contrast-ink);
}

.page-features .cap-boundary__note {
  margin: var(--space-3) 0 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
}

.page-features .cap-boundary__list {
  margin: var(--space-6) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--space-3);
  max-width: var(--measure);
}

.page-features .cap-boundary__list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-3);
  align-items: baseline;
  padding-bottom: var(--space-3);
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
  font-size: var(--text-base);
  line-height: var(--leading-body);
}

.page-features .cap-boundary__list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-features .cap-boundary__no {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  color: var(--color-contrast-accent);
}

.page-features .cap-boundary__more {
  margin-top: var(--space-6);
  max-width: var(--measure);
  border-top: var(--border-thin) solid var(--color-contrast-line);
  padding-top: var(--space-3);
}

.page-features .cap-boundary__more > summary {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: var(--text-base);
  color: var(--color-contrast-accent);
}

.page-features .cap-boundary__more > summary::-webkit-details-marker {
  display: none;
}

.page-features .cap-boundary__more > summary::before {
  content: "＋";
  display: inline-block;
  font-size: var(--text-base);
}

.page-features .cap-boundary__more[open] > summary::before {
  content: "－";
}

.page-features .cap-boundary__more > summary:focus-visible {
  outline: 2px solid var(--color-contrast-accent);
  outline-offset: var(--space-1);
}

.page-features .cap-boundary__more ul {
  margin: var(--space-3) 0 0;
  padding-left: var(--space-4);
  display: grid;
  gap: var(--space-2);
  font-size: var(--text-base);
  line-height: var(--leading-body);
}

/* ---------- 后续入口 ---------- */

.page-features .cap-next {
  padding-block: var(--section-y);
}

.page-features .cap-next__head {
  margin-bottom: var(--space-6);
}

.page-features .cap-next__title {
  margin: var(--space-2) 0 0;
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-features .cap-next__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
}

.page-features .cap-next__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-3);
  padding-block: var(--space-3);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-features .cap-next__item:first-child {
  border-top: var(--border-thin) solid var(--color-line);
}

.page-features .cap-next__idx {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-primary);
  padding-top: 0.35em;
}

.page-features .cap-next__link {
  display: inline-block;
  position: relative;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  text-decoration: none;
}

.page-features .cap-next__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.18em;
  width: 100%;
  height: var(--border-thin);
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 180ms ease;
}

.page-features .cap-next__link:hover,
.page-features .cap-next__link:focus-visible {
  color: var(--color-accent);
}

.page-features .cap-next__link:hover::after,
.page-features .cap-next__link:focus-visible::after {
  transform: scaleX(1);
}

.page-features .cap-next__desc {
  margin: var(--space-2) 0 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 断点 ---------- */

@media (min-width: 720px) {
  .page-features .cap-boundary__list li {
    grid-template-columns: 3em minmax(0, 1fr);
  }
}

@media (min-width: 900px) {
  .page-features .cap-hero {
    padding-block: var(--space-8) var(--section-y-lg);
  }

  .page-features .cap-hero__grid {
    grid-template-columns: minmax(0, 1fr) 300px;
    grid-template-areas:
      "text figures"
      "band band";
    gap: var(--space-6);
    align-items: end;
  }

  .page-features .cap-hero__text {
    grid-area: text;
  }

  .page-features .cap-figures {
    grid-area: figures;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--space-3);
    text-align: right;
  }

  .page-features .cap-figure:nth-child(2) {
    margin-right: var(--space-6);
  }

  .page-features .cap-figure:nth-child(3) {
    margin-right: var(--space-2);
  }

  .page-features .cap-figures .cap-figure__label {
    text-align: right;
  }

  .page-features .cap-band {
    grid-area: band;
  }
}

@media (min-width: 1000px) {
  .page-features .cap-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: var(--space-6);
    row-gap: var(--space-4);
    align-items: start;
  }

  .page-features .cap-grid .cap-entry:nth-child(even) {
    margin-top: var(--space-6);
  }

  .page-features .cap-group__note,
  .page-features .cap-hero__lead,
  .page-features .cap-entry__desc {
    font-size: var(--text-base);
  }

  .page-features .cap-group--split > .cap-group__body,
  .page-features .cap-group__body--mirror {
    grid-template-columns: 340px minmax(0, 1fr);
    column-gap: var(--space-6);
    align-items: start;
  }

  .page-features .cap-group__body--mirror {
    grid-template-columns: minmax(0, 1fr) 340px;
  }

  .page-features .cap-group__body--mirror > .cap-grid {
    order: 1;
  }

  .page-features .cap-group__body--mirror > .cap-media {
    order: 2;
  }
}

@media (max-width: 520px) {
  .page-features .cap-figures {
    gap: var(--space-3);
  }

  .page-features .cap-meta > div {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-1);
  }

  .page-features .cap-entry {
    gap: var(--space-2);
  }

  .page-features .cap-entry__idx {
    font-size: var(--text-xl);
  }
}