.page-features {
  --feat-block-gap: var(--space-4);
  --feat-panel-pad: var(--space-4);
  display: block;
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-body);
}

.page-features > .crumbs {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--space-3) var(--gutter) 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.page-features > .crumbs a {
  color: var(--color-primary);
  text-decoration: none;
}

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

.page-features :focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

/* ---------- 首屏 ---------- */
.page-features .feat-hero {
  position: relative;
  max-width: var(--container);
  margin: var(--space-3) auto 0;
  padding: 0 var(--gutter);
}

.page-features .feat-hero__backdrop {
  position: absolute;
  inset: 0 var(--gutter) auto;
  overflow: hidden;
  border-radius: var(--radius-lg);
  opacity: 0.5;
  pointer-events: none;
}

.page-features .feat-hero__backdrop img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(1.2) contrast(1.05);
}

.page-features .feat-hero__stack {
  position: relative;
  display: grid;
  gap: var(--space-3);
}

.page-features .feat-hero__lead {
  position: relative;
  padding: var(--space-6) var(--space-4) var(--space-6);
  border-radius: var(--radius-md);
  background: var(--color-primary);
  color: var(--color-primary-ink);
  box-shadow: var(--shadow-2);
}

.page-features .feat-hero__lead::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: var(--border-thin) solid color-mix(in srgb, var(--color-primary-ink) 42%, transparent);
  pointer-events: none;
}

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

.page-features .feat-hero__lede {
  max-width: var(--measure);
  margin: var(--space-4) 0 0;
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-primary-ink) 88%, var(--color-primary));
}

.page-features .feat-hero__jump {
  margin-top: var(--space-4);
  background: var(--color-surface);
  color: var(--color-primary);
  border-color: transparent;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.page-features .feat-hero__jump:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-2);
}

.page-features .feat-hero__panel {
  position: relative;
  margin-top: calc(var(--space-6) * -1);
  margin-left: auto;
  width: 100%;
  max-width: 640px;
  padding: var(--feat-panel-pad);
  border-radius: var(--radius-md);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border: var(--border-thin) solid var(--color-contrast-line);
  background-image:
    linear-gradient(0deg, color-mix(in srgb, var(--color-contrast-line) 40%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--color-contrast-line) 40%, transparent) 1px, transparent 1px);
  background-size: 28px 28px;
}

.page-features .feat-hero__figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
  margin: 0;
}

.page-features .feat-hero__fig dt {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: color-mix(in srgb, var(--color-contrast-ink) 66%, transparent);
}

.page-features .feat-hero__fig dd {
  margin: var(--space-1) 0 0;
  line-height: 1;
}

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

.page-features .feat-hero__panel .status-bar {
  margin-top: var(--space-4);
}

/* ---------- 能力分组通用 ---------- */
.page-features .feat-cluster {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--section-y) var(--gutter) 0;
}

.page-features .feat-cluster--b {
  max-width: calc(var(--container) + var(--gutter) * 2);
  margin-left: auto;
  margin-right: 0;
  padding-right: var(--gutter);
}

.page-features .feat-cluster__head {
  display: grid;
  gap: var(--space-3);
  align-items: start;
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-3);
  border-bottom: var(--border-thin) dotted var(--color-line);
}

.page-features .feat-cluster__head .section-index {
  margin: 0;
}

.page-features .feat-cluster__text h2 {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-3xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-features .feat-cluster__thesis {
  max-width: var(--measure);
  margin: var(--space-3) 0 0;
  padding-left: var(--space-3);
  border-left: 3px solid var(--color-primary);
  font-size: var(--text-lg);
  color: var(--color-ink-soft);
}

.page-features .feat-cluster__mark {
  width: 96px;
  margin: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.page-features .feat-cluster__mark img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 能力卡 ---------- */
.page-features .ability {
  position: relative;
  margin-top: var(--space-4);
  padding: var(--feat-panel-pad);
  border-radius: var(--radius-md);
  background: var(--color-surface-alt);
  border: var(--border-thin) solid var(--color-line);
}

.page-features .ability--flat {
  background: var(--color-surface);
}

.page-features .ability::before {
  content: "";
  position: absolute;
  left: var(--space-4);
  right: var(--space-4);
  top: 0;
  height: var(--border-thin);
  background: linear-gradient(90deg, var(--color-primary), transparent 70%);
}

.page-features .ability__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}

.page-features .ability__num {
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: 1;
  color: var(--color-primary);
  letter-spacing: 0.04em;
}

.page-features .ability__title {
  flex: 1 1 12ch;
  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);
}

.page-features .ability__lede {
  max-width: var(--measure);
  margin: var(--space-3) 0 0;
  font-size: var(--text-base);
}

.page-features .ability__facts {
  display: grid;
  gap: var(--space-2);
  margin: var(--space-4) 0 0;
}

.page-features .ability__facts > div {
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
}

.page-features .ability__facts dt {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-primary);
}

.page-features .ability__facts dd {
  margin: var(--space-1) 0 0;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

/* ---------- 配置表 ---------- */
.page-features .spec-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: var(--border-thin) solid var(--color-line);
  background: var(--color-surface);
}

.page-features .spec-table__caption {
  caption-side: top;
  padding: 0 0 var(--space-2);
  text-align: left;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

.page-features .spec-table thead th {
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface-deep);
  text-align: left;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-features .spec-table tbody th,
.page-features .spec-table tbody td {
  padding: var(--space-3);
  text-align: left;
  vertical-align: top;
  font-size: var(--text-sm);
  border-bottom: var(--border-thin) dotted var(--color-line);
}

.page-features .spec-table tbody th {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  background: var(--color-primary-soft);
  white-space: nowrap;
}

.page-features .spec-table tbody tr:nth-child(even) td {
  background: var(--color-surface-alt);
}

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

.page-features .feat-spec-visual {
  margin: var(--space-4) 0 0;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-features .feat-spec-visual .media__caption {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
}

/* ---------- 适配组 ---------- */
.page-features .adapt-grid {
  display: grid;
  gap: var(--space-3);
}

/* ---------- 分栏面板 ---------- */
.page-features .lane-panel {
  position: relative;
  margin: var(--space-4) 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-contrast-surface);
  border: var(--border-thin) solid var(--color-contrast-line);
}

.page-features .lane-panel__bg {
  position: absolute;
  inset: 0;
  margin: 0;
  opacity: 0.22;
  pointer-events: none;
}

.page-features .lane-panel__bg img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-features .lane-panel__lanes {
  position: relative;
  display: grid;
  gap: 0;
}

.page-features .lane {
  padding: var(--feat-panel-pad);
  color: var(--color-contrast-ink);
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
  max-height: 260px;
  overflow-y: auto;
}

.page-features .lane:last-child {
  border-bottom: 0;
}

.page-features .lane__title {
  margin: 0 0 var(--space-3);
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-pill);
  background: color-mix(in srgb, var(--color-contrast-accent) 22%, transparent);
  border: var(--border-thin) solid var(--color-contrast-accent);
  color: var(--color-contrast-ink);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
}

.page-features .lane__list {
  margin: 0;
  padding-left: var(--space-4);
  display: grid;
  gap: var(--space-2);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 86%, transparent);
}

.page-features .lane__list li::marker {
  color: var(--color-contrast-accent);
}

.page-features .lane--accent .lane__title {
  background: var(--color-accent);
  border-color: transparent;
  color: var(--color-accent-ink);
}

/* ---------- 对照表 ---------- */
.page-features .feat-matrix {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--section-y-lg) var(--gutter) 0;
}

.page-features .feat-matrix__head {
  margin-bottom: var(--space-6);
}

.page-features .feat-matrix__head h2 {
  margin: var(--space-2) 0 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-3xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
}

.page-features .feat-matrix__lede {
  max-width: var(--measure);
  margin: var(--space-3) 0 0;
  color: var(--color-ink-soft);
}

.page-features .feat-matrix__scroll {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: var(--border-thin) solid var(--color-line);
  background: var(--color-surface);
}

.page-features .cap-table {
  width: 100%;
  min-width: 720px;
  border-collapse: separate;
  border-spacing: 0;
}

.page-features .cap-table thead th {
  padding: var(--space-2) var(--space-3);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  text-align: left;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  white-space: nowrap;
}

.page-features .cap-table tbody td,
.page-features .cap-table tbody th {
  padding: var(--space-3);
  text-align: left;
  vertical-align: top;
  font-size: var(--text-sm);
  border-bottom: var(--border-thin) dotted var(--color-line);
}

.page-features .cap-table tbody th {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-features .cap-table tbody td.mono {
  font-family: var(--font-mono);
  color: var(--color-primary);
  font-size: var(--text-base);
}

.page-features .cap-table tbody tr:nth-child(even) td,
.page-features .cap-table tbody tr:nth-child(even) th {
  background: var(--color-surface-alt);
}

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

.page-features .cap-table a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: var(--border-thin) dotted var(--color-accent);
  white-space: nowrap;
}

.page-features .cap-table a:hover,
.page-features .cap-table a:focus-visible {
  color: var(--color-focus);
  border-bottom-style: solid;
}

/* ---------- 出口 ---------- */
.page-features .feat-exit {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--section-y) var(--gutter) var(--section-y);
}

.page-features .feat-exit__quote {
  max-width: var(--measure);
}

.page-features .feat-exit__body {
  margin-top: var(--space-6);
  padding: var(--feat-panel-pad);
  border-radius: var(--radius-md);
  background: var(--color-surface-alt);
  border: var(--border-thin) solid var(--color-line);
  border-top: 3px solid var(--color-primary);
}

.page-features .feat-exit__body h2 {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-2xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
}

.page-features .feat-exit__body p {
  max-width: var(--measure);
  margin: var(--space-3) 0 0;
  color: var(--color-ink-soft);
}

.page-features .feat-exit__body a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: var(--border-thin) dotted var(--color-primary);
}

.page-features .feat-exit__body a:hover,
.page-features .feat-exit__body a:focus-visible {
  color: var(--color-focus);
  border-bottom-color: var(--color-focus);
}

.page-features .feat-exit__cta {
  margin-top: var(--space-4);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.page-features .feat-exit__cta:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-2);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-features .feat-hero__stack {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-features .feat-hero__panel {
    margin-top: var(--space-8);
    margin-left: calc(var(--space-6) * -1);
  }

  .page-features .feat-cluster__head {
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
  }

  .page-features .ability__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-features .adapt-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-features .lane-panel__lanes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-features .lane {
    border-bottom: 0;
    border-right: var(--border-thin) solid var(--color-contrast-line);
  }

  .page-features .lane:last-child {
    border-right: 0;
  }
}

@media (min-width: 1024px) {
  .page-features .feat-hero__lead {
    padding: var(--section-y) var(--space-6) var(--section-y);
  }

  .page-features .feat-cluster--b {
    padding-left: calc(var(--gutter) * 2);
  }

  .page-features .feat-cluster--d .feat-cluster__head {
    padding-right: var(--space-8);
  }

  .page-features .ability {
    padding: var(--space-6);
  }

  .page-features .spec-table tbody th,
  .page-features .spec-table tbody td {
    padding: var(--space-4) var(--space-3);
  }
}

@media (max-width: 719px) {
  .page-features .feat-hero__panel {
    margin-top: var(--space-3);
    max-width: none;
  }

  .page-features .feat-cluster__mark {
    width: 72px;
  }

  .page-features .feat-matrix__scroll {
    margin-right: calc(var(--gutter) * -1);
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
  }
}
</main>