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

.page-features .feat-crumbs__sep {
  margin-inline: var(--space-1);
  color: var(--color-ink-muted);
}

/* ---------- 首屏 ---------- */

.page-features .feat-hero {
  padding-block: var(--space-4) var(--space-8);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-features .feat-hero__kicker {
  margin: 0 0 var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-ink-muted);
}

.page-features .feat-hero__title {
  margin: 0;
  max-width: min(100%, 9em);
  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);
}

.page-features .feat-hero__lede {
  margin: var(--space-4) 0 0;
  max-width: var(--measure);
  font-size: var(--text-lg);
  color: var(--color-ink-soft);
}

.page-features .feat-arena {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.page-features .feat-arena__spine {
  display: none;
}

.page-features .feat-arena__side {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-3);
  border-radius: var(--radius-lg);
}

.page-features .feat-arena__side--home {
  background: var(--color-surface-alt);
  border-left: var(--border-thin) solid var(--color-ink-muted);
}

.page-features .feat-arena__side--away {
  background: var(--color-surface-deep);
  border-left: var(--border-thin) solid var(--color-ink-muted);
}

.page-features .feat-arena__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.22em;
  color: var(--color-ink-muted);
}

.page-features .feat-arena__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius-lg);
  filter: saturate(0.4) contrast(0.93) brightness(0.97);
}

.page-features .feat-arena__text {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.85;
  color: var(--color-ink-soft);
}

.page-features .feat-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4) var(--space-3);
  margin: var(--space-6) 0 0;
  padding: var(--space-3) 0 0;
  border-top: var(--border-thin) solid var(--color-ink-muted);
  list-style: none;
}

.page-features .feat-figures__value {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-3xl);
  line-height: 1;
  color: var(--color-ink);
  font-variant-numeric: tabular-nums;
}

.page-features .feat-figures__item--mark .feat-figures__value {
  color: var(--color-primary);
}

.page-features .feat-figures__label {
  display: block;
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

/* ---------- 区块骨架 ---------- */

.page-features .feat-band {
  padding-block: calc(var(--section-y-lg) + var(--space-2));
}

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

.page-features .feat-band--close {
  border-top: var(--border-thin) solid var(--color-line);
}

.page-features .section-head {
  max-width: var(--measure);
  margin-bottom: var(--space-6);
}

.page-features .section-head__kicker {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-ink-muted);
}

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

.page-features .section-head__note {
  margin: var(--space-3) 0 0;
  font-size: var(--text-sm);
  line-height: 1.85;
  color: var(--color-ink-soft);
}

/* ---------- 明细折叠 ---------- */

.page-features .feat-group {
  border-top: var(--border-thin) solid var(--color-line);
}

.page-features .feat-group:last-child {
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-features .feat-group > summary {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  transition: color 240ms ease-out;
}

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

.page-features .feat-group > summary:hover {
  color: var(--color-accent);
}

.page-features .feat-group > summary:focus-visible {
  outline: var(--border-thin) solid var(--color-focus);
  outline-offset: calc(var(--border-thin) * 3);
}

.page-features .feat-group__count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
}

.page-features .feat-group > summary::after {
  content: "＋";
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-features .feat-group[open] > summary::after {
  content: "－";
}

.page-features .feat-group__body {
  padding-bottom: var(--space-6);
}

.page-features .feat-group__caliber {
  max-width: var(--measure);
  margin: var(--space-4) 0 0;
  padding-left: var(--space-3);
  border-left: var(--space-1) solid var(--color-primary-soft);
  font-size: var(--text-sm);
  line-height: 1.85;
  color: var(--color-ink-soft);
}

/* ---------- 表格 ---------- */

.page-features .table-wrap {
  overflow-x: auto;
  overscroll-behavior-x: contain;
}

.page-features .feat-table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
  font-size: var(--text-sm);
  line-height: 1.75;
  text-align: left;
}

.page-features .feat-table__caption {
  padding-bottom: var(--space-2);
  text-align: left;
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}

.page-features .feat-table th,
.page-features .feat-table td {
  padding: var(--space-2) var(--space-3);
  border-bottom: var(--border-thin) solid var(--color-line);
  vertical-align: top;
}

.page-features .feat-table thead th {
  background: var(--color-surface-deep);
  border-bottom: var(--border-thin) solid var(--color-ink-muted);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  white-space: nowrap;
}

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

.page-features .feat-table tbody td {
  color: var(--color-ink-soft);
}

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

.page-features .feat-table tbody tr:hover,
.page-features .feat-table tbody tr:focus-within {
  background: var(--color-highlight);
}

.page-features .feat-table tbody tr:focus-visible {
  outline: var(--border-thin) solid var(--color-focus);
  outline-offset: calc(var(--border-thin) * -2);
}

/* ---------- 统计边界 ---------- */

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

.page-features .feat-bound {
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-ink-muted);
}

.page-features .feat-bound__title {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

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

.page-features .feat-bound__list dt {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-ink-muted);
}

.page-features .feat-bound__list dd {
  margin: var(--space-1) 0 0;
  font-size: var(--text-sm);
  line-height: 1.85;
  color: var(--color-ink-soft);
}

.page-features .feat-plate {
  margin: var(--space-8) 0 0;
}

.page-features .feat-plate img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  filter: saturate(0.35) contrast(0.94);
}

.page-features .feat-plate figcaption {
  max-width: var(--measure);
  margin-top: var(--space-2);
  font-size: var(--text-xs);
  line-height: 1.8;
  color: var(--color-ink-muted);
}

/* ---------- 补时深墨区 ---------- */

.page-features .feat-slab {
  padding-block: calc(var(--section-y-lg) + var(--space-2));
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-features .feat-slab__head {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.page-features .feat-slab__kicker {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-contrast-ink);
}

.page-features .feat-slab__title {
  max-width: 22ch;
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
}

.page-features .feat-slab__figure {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  line-height: 1;
  color: var(--color-contrast-ink);
}

.page-features .feat-slab__unit {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
}

.page-features .feat-slab__media {
  margin: 0 0 var(--space-4);
}

.page-features .feat-slab__media img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  filter: saturate(0.3) contrast(0.9) brightness(0.82);
  opacity: 0.92;
}

.page-features .feat-slab .feat-table {
  min-width: 720px;
}

.page-features .feat-slab .feat-table__caption {
  color: var(--color-contrast-ink);
}

.page-features .feat-slab .feat-table thead th {
  background: var(--color-contrast-surface);
  border-top: var(--border-thin) solid var(--color-contrast-line);
  border-bottom: var(--border-thin) solid var(--color-contrast-ink);
  color: var(--color-contrast-ink);
}

.page-features .feat-slab .feat-table tbody th,
.page-features .feat-slab .feat-table tbody td {
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
  color: var(--color-contrast-ink);
  background: transparent;
}

.page-features .feat-slab .feat-table tbody tr:nth-child(even) {
  background: transparent;
}

.page-features .feat-slab .feat-table tbody tr:hover,
.page-features .feat-slab .feat-table tbody tr:focus-within {
  background: color-mix(in srgb, var(--color-contrast-ink) 10%, var(--color-contrast-surface));
}

.page-features .feat-slot {
  letter-spacing: 0.04em;
}

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

.page-features .feat-slab__note {
  max-width: var(--measure);
  margin: var(--space-4) 0 0;
  padding-left: var(--space-3);
  border-left: var(--space-1) solid var(--color-contrast-line);
  font-size: var(--text-sm);
  line-height: 1.85;
  color: var(--color-contrast-ink);
}

/* ---------- 阅读建议 ---------- */

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

.page-features .feat-read__steps {
  counter-reset: feat-step;
  display: grid;
  gap: var(--space-4);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-features .feat-read__steps li {
  position: relative;
  padding-left: var(--space-6);
  font-size: var(--text-base);
  color: var(--color-ink);
}

.page-features .feat-read__steps li::before {
  content: counter(feat-step, decimal-leading-zero);
  counter-increment: feat-step;
  position: absolute;
  left: 0;
  top: 0.3em;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-features .feat-read__hint {
  padding: var(--space-4) var(--space-3);
  background: var(--color-surface-alt);
  border-left: var(--space-1) solid var(--color-primary-soft);
  border-radius: var(--radius-lg);
}

.page-features .feat-read__hint h3 {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-features .feat-read__hint p {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.85;
  color: var(--color-ink-soft);
}

/* ---------- 收束 ---------- */

.page-features .feat-close__title {
  max-width: 18ch;
  margin: 0 0 var(--space-3);
  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 .feat-close__text {
  max-width: var(--measure);
  margin: 0;
  font-size: var(--text-base);
  color: var(--color-ink-soft);
}

.page-features .feat-close__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin: var(--space-6) 0 0;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-features .feat-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-features .feat-bounds {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-6) var(--space-4);
  }
}

@media (min-width: 900px) {
  .page-features .feat-hero {
    padding-block: var(--space-6) var(--space-8);
  }

  .page-features .feat-arena {
    grid-template-columns: 1fr var(--border-thin) 1fr;
    align-items: stretch;
  }

  .page-features .feat-arena__spine {
    display: block;
    background-image: repeating-linear-gradient(
      to bottom,
      var(--color-ink-muted) 0,
      var(--color-ink-muted) 2px,
      transparent 2px,
      transparent var(--space-1)
    );
    background-repeat: repeat-y;
  }

  .page-features .feat-slab__head {
    flex-direction: row;
    align-items: flex-end;
    justify-content: space-between;
    gap: var(--space-6);
  }

  .page-features .feat-read {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: var(--space-8);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-features * {
    transition: none !important;
    animation: none !important;
    scroll-behavior: auto !important;
  }
}