.page-features {
  --feat-pad-y: var(--space-6);
  --feat-aside-line: var(--color-primary);
}

/* ---------- 面包屑 ---------- */
.page-features .breadcrumb {
  padding-top: var(--space-3);
  padding-bottom: var(--space-3);
  border-bottom: var(--border-thin) solid var(--color-line);
}

/* ---------- 首屏 ---------- */
.page-features .feat-hero {
  display: grid;
  grid-template-columns: 1fr;
}

.page-features .feat-hero__pane {
  padding: var(--space-6) var(--space-3);
}

.page-features .feat-hero__pane--light {
  background: var(--color-surface);
  color: var(--color-ink);
}

.page-features .feat-hero__pane--dark {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-top: var(--border-thick) solid var(--color-contrast-line);
}

.page-features .feat-hero__eyebrow {
  color: var(--color-contrast-accent);
}

.page-features .feat-hero__title {
  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);
  margin: var(--space-2) 0 var(--space-3);
  color: var(--color-contrast-ink);
}

.page-features .feat-hero__lead {
  max-width: 34ch;
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  margin: 0 0 var(--space-3);
}

.page-features .feat-hero__note {
  font-size: var(--text-sm);
  color: var(--color-contrast-accent);
  margin: 0;
  letter-spacing: 0.02em;
}

.page-features .feat-hero__figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-features .feat-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.page-features .feat-metrics {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: var(--border-thick) solid var(--color-line);
}

.page-features .feat-metric {
  padding: var(--space-3) var(--space-2) var(--space-3) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
  border-right: var(--border-thin) solid var(--color-line);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-features .feat-metric:nth-child(2n) {
  border-right: 0;
  padding-left: var(--space-2);
}

.page-features .feat-metric:nth-child(2n + 1) {
  padding-left: 0;
}

.page-features .feat-metric:nth-child(n + 3) {
  border-bottom: 0;
}

.page-features .feat-metric__num {
  font-family: var(--font-mono);
  font-size: calc(var(--text-figure) * 0.6);
  line-height: 1.1;
  font-weight: var(--weight-heading);
  color: var(--color-primary);
}

.page-features .feat-metric__label {
  font-size: var(--text-sm);
  line-height: 1.2;
  color: var(--color-ink-soft);
}

/* ---------- 筛选 ---------- */
.page-features .feat-filter {
  background: var(--color-surface-deep);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-features .feat-filter__bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  padding-top: var(--space-2);
  padding-bottom: var(--space-2);
}

.page-features .feat-filter__label {
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
  margin-right: var(--space-1);
}

/* ---------- 分带骨架 ---------- */
.page-features .feat-band {
  --band-bg: var(--color-surface);
  --band-fg: var(--color-ink);
  --band-soft: var(--color-ink-soft);
  --band-line: var(--color-line);
  --band-accent: var(--color-primary);
  --band-hover: var(--color-primary-soft);
  background: var(--band-bg);
  color: var(--band-fg);
  padding-top: var(--feat-pad-y);
  padding-bottom: var(--feat-pad-y);
  border-bottom: var(--border-thick) solid var(--color-line);
}

.page-features .feat-band--soft {
  --band-bg: var(--color-surface-alt);
}

.page-features .feat-band--dark {
  --band-bg: var(--color-contrast-surface);
  --band-fg: var(--color-contrast-ink);
  --band-soft: color-mix(in srgb, var(--color-contrast-ink) 72%, transparent);
  --band-line: var(--color-contrast-line);
  --band-accent: var(--color-contrast-accent);
  --band-hover: color-mix(in srgb, var(--color-contrast-accent) 14%, transparent);
  border-bottom-color: var(--color-contrast-line);
}

.page-features .feat-band__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  align-items: start;
}

.page-features .feat-band__aside {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.page-features .feat-band__figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-features .feat-band__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.page-features .feat-band__label {
  border-left: var(--border-thick) solid var(--band-accent);
  padding-left: var(--space-2);
}

.page-features .feat-band__index {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--band-accent);
  margin: 0 0 var(--space-1);
}

.page-features .feat-band__title {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  font-weight: var(--weight-heading);
  margin: 0 0 var(--space-2);
  color: var(--band-fg);
}

.page-features .feat-band__desc {
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--band-soft);
  margin: 0;
  max-width: 40ch;
}

.page-features .feat-band__link {
  grid-column: 1 / -1;
  margin: var(--space-3) 0 0;
}

/* ---------- 条目 ---------- */
.page-features .feat-entries {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--border-thin) solid var(--band-line);
}

.page-features .feat-entry {
  border-bottom: var(--border-thin) solid var(--band-line);
  padding: var(--space-3) var(--space-2);
  transition: background-color 160ms ease, transform 160ms ease;
}

.page-features .feat-entry__title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  line-height: 1.25;
  font-weight: var(--weight-heading);
  margin: 0 0 var(--space-1);
  color: var(--band-fg);
}

.page-features .feat-entry__body {
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--band-soft);
  margin: 0;
  max-width: 56ch;
}

.page-features .feat-entry__more {
  margin-top: var(--space-2);
}

.page-features .feat-entry__more > summary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  cursor: pointer;
  list-style: none;
  font-size: var(--text-sm);
  line-height: 1.2;
  color: var(--band-accent);
  border-bottom: var(--border-thin) solid transparent;
}

.page-features .feat-entry__more > summary::-webkit-details-marker {
  display: none;
}

.page-features .feat-entry__more > summary::before {
  content: "+";
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}

.page-features .feat-entry__more[open] > summary::before {
  content: "−";
}

.page-features .feat-entry__more > summary:focus-visible {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: 2px;
}

.page-features .feat-entry__scene {
  margin: var(--space-2) 0 0;
  padding-left: var(--space-2);
  border-left: var(--border-thin) solid var(--band-line);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--band-soft);
  max-width: 54ch;
}

/* ---------- 行动出口 ---------- */
.page-features .feat-exit {
  background: var(--color-surface-alt);
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
}

.page-features .feat-exit__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.page-features .feat-exit__title {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  margin: var(--space-2) 0 var(--space-2);
  max-width: 26ch;
}

.page-features .feat-exit__lead {
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  margin: 0 0 var(--space-3);
  max-width: 48ch;
}

.page-features .feat-exit__side {
  border-top: var(--border-thick) solid var(--color-line);
  padding-top: var(--space-3);
}

.page-features .feat-exit__side-title {
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
  margin: 0 0 var(--space-2);
}

.page-features .feat-exit__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-features .feat-exit__list li {
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-features .feat-exit__list a {
  display: block;
  padding: var(--space-2) 0;
  color: var(--color-primary);
  text-decoration: none;
  font-size: var(--text-base);
  line-height: 1.4;
  transition: transform 160ms ease;
}

.page-features .feat-exit__list a:hover,
.page-features .feat-exit__list a:focus-visible {
  transform: translateX(6px);
}

.page-features .feat-exit__list a:focus-visible {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: 2px;
}

/* ---------- 桌面端 ---------- */
@media (min-width: 960px) {
  .page-features {
    --feat-pad-y: var(--space-8);
  }

  .page-features .feat-hero {
    grid-template-columns: 5fr 7fr;
    border-bottom: var(--border-thick) solid var(--color-line);
  }

  .page-features .feat-hero__pane {
    padding: var(--space-8) var(--space-6);
  }

  .page-features .feat-hero__pane--dark {
    border-top: 0;
    padding-left: var(--space-8);
  }

  .page-features .feat-hero__pane--light {
    border-left: var(--border-thick) solid var(--color-contrast-line);
  }

  .page-features .feat-hero__title {
    margin-top: var(--space-3);
  }

  .page-features .feat-band__inner {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: var(--space-6) var(--space-8);
  }

  .page-features .feat-exit__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-8);
  }

  .page-features .feat-exit__side {
    border-top: 0;
    border-left: var(--border-thick) solid var(--color-line);
    padding-top: 0;
    padding-left: var(--space-4);
  }
}

@media (min-width: 1280px) {
  .page-features .feat-hero__pane {
    padding: var(--space-8) var(--space-8);
  }
}

/* ---------- 悬浮：条目底色切换与位移 ---------- */
@media (hover: hover) {
  .page-features .feat-entry:hover {
    background: var(--band-hover);
    transform: translateX(6px);
  }
}

.page-features .feat-entry:focus-within {
  background: var(--band-hover);
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-features .feat-entry,
  .page-features .feat-exit__list a {
    transition: none;
  }

  .page-features .feat-entry:hover {
    transform: none;
  }

  .page-features .feat-exit__list a:hover,
  .page-features .feat-exit__list a:focus-visible {
    transform: none;
    text-decoration: underline;
  }
}
<<<END>>>