.page-features {
  --feat-rule: color-mix(in srgb, var(--color-line) 80%, transparent);
  --feat-row-tint: color-mix(in srgb, var(--color-surface-deep) 55%, transparent);
}

/* ---------- 首屏 ---------- */
.page-features .feat-hero {
  position: relative;
  overflow: hidden;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding-block: var(--space-6) var(--space-8);
  border-bottom-left-radius: var(--radius-lg);
  border-bottom-right-radius: var(--radius-lg);
}

.page-features .feat-hero__slash {
  position: absolute;
  inset-inline-end: -12%;
  top: -30%;
  width: 62%;
  height: 170%;
  background: color-mix(in srgb, var(--color-primary) 22%, transparent);
  transform: rotate(14deg);
  pointer-events: none;
}

.page-features .feat-hero__inner {
  position: relative;
  z-index: 1;
}

.page-features .feat-hero .breadcrumb a,
.page-features .feat-hero .breadcrumb span {
  color: var(--color-contrast-ink);
  opacity: 0.75;
}

.page-features .feat-hero__grid {
  align-items: center;
  row-gap: var(--space-6);
}

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

.page-features .feat-hero__title {
  margin: var(--space-2) 0 var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-display);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
}

.page-features .feat-hero__lead {
  color: color-mix(in srgb, var(--color-contrast-ink) 82%, transparent);
  max-width: var(--measure);
}

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

.page-features .feat-frame {
  border: var(--border-thick) solid var(--color-contrast-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface-deep);
  box-shadow: var(--shadow-2);
}

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

.page-features .feat-frame .media-frame__overlay-text {
  color: var(--color-contrast-ink);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
}

.page-features .feat-figures {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-6);
  margin: var(--space-8) 0 0;
  padding: var(--space-3) 0 0;
  list-style: none;
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.page-features .feat-figures__item {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  min-width: 132px;
}

.page-features .feat-figures__item .figure-num {
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  line-height: 1;
  color: var(--color-contrast-accent);
}

.page-features .feat-figures__label {
  font-size: var(--text-sm);
  color: color-mix(in srgb, var(--color-contrast-ink) 72%, transparent);
}

/* ---------- 通用小标题 ---------- */
.page-features .feat-h2 {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  margin: var(--space-1) 0 var(--space-2);
}

.page-features .feat-h3 {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  color: var(--color-ink);
  margin: 0 0 var(--space-2);
}

.page-features .feat-note {
  max-width: var(--measure);
  color: var(--color-ink-soft);
  font-size: var(--text-base);
}

/* ---------- 对照表区 ---------- */
.page-features .feat-matrix__head {
  max-width: var(--measure);
  margin-bottom: var(--space-6);
}

.page-features .feat-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-6);
  list-style: none;
  margin: 0 0 var(--space-4);
  padding: var(--space-3);
  background: var(--color-primary-soft);
  border-radius: var(--radius-md);
}

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

.page-features .feat-legend__text {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-features .cap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 48px;
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.05em;
  border: var(--border-thin) solid transparent;
  white-space: nowrap;
}

.page-features .cap--full {
  background: var(--color-primary);
  color: var(--color-primary-ink);
  border-color: var(--color-primary);
}

.page-features .cap--part {
  background: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.page-features .cap--none {
  background: transparent;
  color: var(--color-ink-muted);
  border-color: var(--color-line);
}

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

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

.page-features .feat-table__caption {
  caption-side: top;
  padding: var(--space-3);
  text-align: left;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
  border-bottom: var(--border-thin) solid var(--feat-rule);
}

.page-features .feat-table thead th {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: var(--weight-body);
  letter-spacing: 0.06em;
  text-align: left;
  padding: var(--space-3) var(--space-3);
  border-left: var(--border-thin) solid var(--color-contrast-line);
  white-space: nowrap;
}

.page-features .feat-table thead .feat-table__corner {
  border-left: none;
  color: var(--color-contrast-accent);
}

.page-features .feat-table tbody th {
  text-align: left;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  padding: var(--space-3);
  border-top: var(--border-thin) solid var(--feat-rule);
  background: var(--color-surface);
}

.page-features .feat-table tbody td {
  padding: var(--space-3);
  border-top: var(--border-thin) solid var(--feat-rule);
  border-left: var(--border-thin) solid var(--feat-rule);
  background: var(--color-surface);
}

.page-features .feat-table tbody tr:nth-child(even) th,
.page-features .feat-table tbody tr:nth-child(even) td {
  background: var(--feat-row-tint);
}

.page-features .feat-table tbody tr:hover th,
.page-features .feat-table tbody tr:hover td {
  background: var(--color-primary-soft);
}

.page-features .feat-table tbody tr:hover .cap--none {
  color: var(--color-ink-soft);
  border-color: var(--color-ink-soft);
}

/* ---------- 差异解读 ---------- */
.page-features .feat-diff__head {
  max-width: var(--measure);
  margin-bottom: var(--space-8);
}

.page-features .feat-block {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  padding-block: var(--space-6);
  border-top: var(--border-thin) solid var(--color-line);
}

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

.page-features .feat-block__text p {
  max-width: var(--measure);
  color: var(--color-ink-soft);
}

.page-features .feat-block__since {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-features .feat-block__since a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-features .feat-block__since a:hover {
  background: var(--color-primary-soft);
}

.page-features .feat-block__media {
  margin: 0;
}

.page-features .feat-block__media .media-frame__caption {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  padding-top: var(--space-1);
}

.page-features .feat-block__aside {
  background: var(--color-highlight);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

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

.page-features .feat-mini__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  padding-bottom: var(--space-1);
  border-bottom: var(--border-thin) solid color-mix(in srgb, var(--color-ink) 18%, transparent);
}

.page-features .feat-mini__row dt {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-features .feat-mini__row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  color: var(--color-ink);
}

.page-features .feat-mini__note {
  margin: var(--space-3) 0 0;
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

/* ---------- 选择建议 ---------- */
.page-features .feat-advice__head {
  max-width: var(--measure);
  margin-bottom: var(--space-6);
}

.page-features .feat-advice__grid {
  row-gap: var(--space-4);
}

.page-features .feat-pick {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  box-shadow: var(--shadow-1);
  border-top: var(--border-thick) solid var(--color-line);
}

.page-features .feat-pick--marked {
  border-top-color: var(--color-accent);
  background: var(--color-primary-soft);
}

.page-features .feat-pick__tag {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
  margin: 0 0 var(--space-1);
}

.page-features .feat-pick p:last-child {
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  margin: 0;
}

.page-features .feat-advice__band {
  margin-top: var(--space-6);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.page-features .feat-advice__band-text {
  flex: 1 1 380px;
}

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

.page-features .feat-advice__band-action {
  margin: 0;
}

/* ---------- 延伸入口 ---------- */
.page-features .feat-exit__title {
  margin-bottom: var(--space-4);
}

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

.page-features .feat-exit .index-list__link {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "no title"
    "no meta";
  gap: 2px var(--space-3);
  align-items: center;
  padding: var(--space-3);
  border-radius: var(--radius-md);
  border: var(--border-thin) solid var(--color-line);
  background: var(--color-surface);
  text-decoration: none;
}

.page-features .feat-exit .index-list__no {
  grid-area: no;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent);
}

.page-features .feat-exit .index-list__title {
  grid-area: title;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  color: var(--color-ink);
}

.page-features .feat-exit .index-list__meta {
  grid-area: meta;
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.page-features .feat-exit .index-list__link:hover {
  background: var(--color-primary-soft);
  border-color: var(--color-primary);
}

.page-features .feat-exit__foot {
  margin-top: var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-features .feat-exit__foot a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 4px;
}

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

/* ---------- 窄屏 ---------- */
@media (max-width: 899px) {
  .page-features .feat-hero__slash {
    inset-inline-end: -32%;
    width: 90%;
    opacity: 0.6;
  }

  .page-features .feat-figures {
    gap: var(--space-3) var(--space-4);
  }

  .page-features .feat-figures__item {
    min-width: 108px;
  }

  .page-features .feat-figures__item .figure-num {
    font-size: var(--text-2xl);
  }

  .page-features .feat-advice__band {
    flex-direction: column;
    align-items: flex-start;
  }
}

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

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

  .page-features .feat-block--flip {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-features .feat-block--flip .feat-block__text {
    order: 2;
  }

  .page-features .feat-block--flip .feat-block__media,
  .page-features .feat-block--flip .feat-block__aside {
    order: 1;
  }
}

@media (max-width: 639px) {
  .page-features .feat-hero__title {
    margin-top: var(--space-1);
  }

  .page-features .feat-legend {
    flex-direction: column;
    gap: var(--space-2);
  }

  .page-features .feat-table {
    min-width: 560px;
    font-size: var(--text-xs);
  }

  .page-features .feat-table thead th,
  .page-features .feat-table tbody th,
  .page-features .feat-table tbody td {
    padding: var(--space-2);
  }

  .page-features .feat-exit .index-list__link {
    padding: var(--space-2);
  }
}