.page-features {
  --pf-ink-on-deep: var(--color-contrast-ink);
  --pf-deep-line: var(--color-contrast-line);
  display: block;
}

/* ---------- 首屏 ---------- */

.page-features .pf-hero {
  position: relative;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding-block: var(--space-6) var(--section-y);
  overflow: hidden;
}

.page-features .pf-hero .breadcrumb,
.page-features .pf-hero .breadcrumb__list,
.page-features .pf-hero .breadcrumb__list a {
  color: var(--color-contrast-ink);
}

.page-features .pf-hero .breadcrumb__list a {
  text-decoration-color: var(--color-contrast-accent);
}

.page-features .pf-hero .eyebrow {
  color: var(--color-contrast-accent);
  margin-bottom: var(--space-2);
}

.page-features .pf-hero__title {
  color: var(--color-contrast-ink);
  margin: 0 0 var(--space-4);
  font-size: var(--text-display);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  max-width: 14ch;
}

.page-features .pf-hero__split {
  display: grid;
  gap: var(--space-4);
  align-items: end;
}

.page-features .pf-hero__lede {
  color: var(--color-contrast-ink);
  margin: 0;
  max-width: var(--measure);
}

.page-features .pf-hero__frame {
  background: var(--color-surface);
  border-color: var(--color-contrast-accent);
}

.page-features .pf-hero__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 矩阵板 ---------- */

.page-features .pf-board {
  position: relative;
  margin-top: var(--section-y-lg);
}

.page-features .pf-board__cap {
  margin: 0 0 var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-contrast-accent);
  letter-spacing: 0.04em;
}

.page-features .pf-board__scroll {
  overflow-x: auto;
  padding-bottom: var(--space-2);
  scrollbar-width: thin;
}

.page-features .pf-matrix {
  display: grid;
  grid-template-columns: auto repeat(6, minmax(38px, 1fr));
  gap: calc(var(--space-1) / 2);
  min-width: 540px;
}

.page-features .pf-matrix__axis {
  display: block;
}

.page-features .pf-matrix__type {
  font-size: var(--text-xs);
  color: var(--color-contrast-ink);
  text-align: center;
  padding-bottom: var(--space-1);
  line-height: 1.15;
}

.page-features .pf-matrix__range {
  display: flex;
  align-items: center;
  padding-right: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-contrast-ink);
  white-space: nowrap;
}

.page-features .pf-cell {
  display: block;
  height: calc(var(--space-3) + var(--space-1));
  border: var(--border-thin) solid var(--pf-deep-line);
  border-radius: var(--radius-sm);
  background: transparent;
}

.page-features .pf-cell--inuse {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.page-features .pf-cell--arch {
  background: var(--pf-deep-line);
  border-color: var(--pf-deep-line);
}

.page-features .pf-cell--merge {
  background: var(--color-contrast-accent);
  border-color: var(--color-contrast-accent);
}

.page-features .pf-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-3);
  margin: var(--space-3) 0 0;
  padding: 0;
  list-style: none;
  font-size: var(--text-xs);
  color: var(--color-contrast-ink);
}

.page-features .pf-legend li {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.page-features .pf-legend__dot {
  width: var(--space-2);
  height: var(--space-2);
  border-radius: var(--radius-sm);
  border: var(--border-thin) solid var(--pf-deep-line);
  display: inline-block;
}

.page-features .pf-legend__dot--inuse {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.page-features .pf-legend__dot--arch {
  background: var(--pf-deep-line);
}

.page-features .pf-legend__dot--merge {
  background: var(--color-contrast-accent);
  border-color: var(--color-contrast-accent);
}

.page-features .pf-legend__dot--empty {
  background: transparent;
}

/* ---------- 四个大数字 ---------- */

.page-features .pf-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.page-features .pf-stat {
  background: var(--color-contrast-surface);
  border: var(--border-thin) solid var(--color-contrast-accent);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-3) var(--space-3);
  box-shadow: 6px 6px 0 var(--pf-deep-line);
}

.page-features .pf-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: var(--weight-heading);
  font-size: var(--text-figure);
  line-height: 0.95;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  color: var(--color-contrast-ink);
}

.page-features .pf-stat__label {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  color: var(--color-contrast-accent);
}

/* ---------- 通用引导段 ---------- */

.page-features .pf-lead {
  max-width: var(--measure);
  margin: 0 0 var(--space-6);
  font-size: var(--text-lg);
  color: var(--color-ink-soft);
}

/* ---------- 六大类型分组 ---------- */

.page-features .pf-types {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}

.page-features .pf-type {
  position: relative;
  background: var(--color-surface);
  border: var(--border-thick) solid var(--color-line);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  box-shadow: 5px 5px 0 var(--color-surface-deep);
}

.page-features .pf-type::before {
  content: "";
  position: absolute;
  top: calc(var(--space-2) * -1);
  right: var(--space-3);
  width: var(--space-6);
  height: var(--space-1);
  background: var(--color-accent);
  border-radius: var(--radius-pill);
}

.page-features .pf-type__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-1) var(--space-2);
  margin-bottom: var(--space-3);
}

.page-features .pf-type__tag {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  letter-spacing: 0.06em;
}

.page-features .pf-type__head h3 {
  margin: 0;
  flex: 1 1 auto;
}

.page-features .pf-type__range {
  font-size: var(--text-xs);
  color: var(--color-accent);
  background: var(--color-highlight);
  border-radius: var(--radius-sm);
  padding: 2px var(--space-1);
  margin: 0;
}

.page-features .pf-points {
  list-style: none;
  margin: 0 0 var(--space-3);
  padding: var(--space-2) var(--space-3);
  background: var(--color-primary-soft);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  color: var(--color-ink);
}

.page-features .pf-points li {
  position: relative;
  padding-left: var(--space-3);
  margin-bottom: var(--space-1);
}

.page-features .pf-points li:last-child {
  margin-bottom: 0;
}

.page-features .pf-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: var(--space-2);
  height: 3px;
  background: var(--color-primary);
}

.page-features .pf-entries {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.page-features .pf-entry {
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  padding: var(--space-2);
  background: var(--color-surface);
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.page-features .pf-entry:hover,
.page-features .pf-entry:focus-within {
  transform: translate(-2px, -2px);
  border-color: var(--color-accent);
  box-shadow: 4px 4px 0 var(--color-highlight);
}

.page-features .pf-entry__no {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--weight-heading);
  letter-spacing: 0.04em;
  color: var(--color-primary-ink);
  background: var(--color-primary);
  border-radius: var(--radius-sm);
  padding: 1px var(--space-1);
}

.page-features .pf-entry__name {
  margin: var(--space-1) 0 0;
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  color: var(--color-ink);
}

.page-features .pf-entry__desc {
  margin: var(--space-1) 0 var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-features .pf-entry__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1) var(--space-2);
  margin: 0;
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

/* ---------- 版本区间编列 ---------- */

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

.page-features .pf-rule-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: pfrule;
  display: grid;
  gap: var(--space-3);
}

.page-features .pf-rule-list li {
  position: relative;
  padding-left: var(--space-6);
  border-left: var(--border-thick) solid var(--color-line);
  padding-block: var(--space-1);
}

.page-features .pf-rule-list li::before {
  counter-increment: pfrule;
  content: counter(pfrule, decimal-leading-zero);
  position: absolute;
  left: var(--space-2);
  top: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  color: var(--color-accent);
}

.page-features .pf-rule-list h3 {
  margin: 0 0 var(--space-1);
}

.page-features .pf-rule-list p {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  max-width: var(--measure);
}

.page-features .pf-rule-list a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-features .pf-ranges__figure {
  background: var(--color-surface-deep);
  border-color: var(--color-accent);
}

.page-features .pf-ranges__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 使用场景 ---------- */

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

.page-features .pf-scene-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.page-features .pf-scene {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-2);
  align-items: start;
  background: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-3);
}

.page-features .pf-scene:nth-child(even) {
  background: var(--color-surface-alt);
  margin-left: var(--space-3);
}

.page-features .pf-scene__idx {
  font-size: var(--text-xs);
  color: var(--color-primary-ink);
  background: var(--color-accent);
  border-radius: var(--radius-sm);
  padding: 2px var(--space-1);
  white-space: nowrap;
}

.page-features .pf-scene__body h3 {
  margin: 0 0 var(--space-1);
}

.page-features .pf-scene__body p {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-features .pf-scenes__figure {
  background: var(--color-surface);
  border-color: var(--color-primary);
}

.page-features .pf-scenes__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 字段与状态 ---------- */

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

.page-features .pf-field-list {
  list-style: none;
  margin: 0 0 var(--space-4);
  padding: 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-features .pf-field-list .field-row {
  display: grid;
  grid-template-columns: minmax(96px, auto) 1fr;
  gap: var(--space-2);
  align-items: start;
  padding: var(--space-2) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-features .pf-field-list .field-key {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  letter-spacing: 0.02em;
}

.page-features .pf-field-list .field-val {
  font-size: var(--text-base);
  color: var(--color-ink);
}

.page-features .pf-states {
  display: grid;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.page-features .pf-state {
  border: var(--border-thin) solid var(--color-line);
  border-left: var(--border-thick) solid var(--color-primary);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  padding: var(--space-2) var(--space-3);
}

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

.page-features .pf-note {
  margin: 0;
  padding: var(--space-3);
  background: var(--color-highlight);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-ink);
  max-width: var(--measure);
}

.page-features .pf-note a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-features .pf-fields__figure {
  background: var(--color-surface-deep);
  border-color: var(--color-line);
}

.page-features .pf-fields__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 进阶入口 ---------- */

.page-features .pf-next .eyebrow {
  color: var(--color-contrast-accent);
}

.page-features .pf-next .title-section {
  color: var(--color-contrast-ink);
  max-width: 22ch;
}

.page-features .pf-next__text {
  max-width: var(--measure);
  color: var(--color-contrast-ink);
  margin: 0 0 var(--space-4);
}

.page-features .pf-next__cta {
  margin-bottom: var(--space-6);
}

.page-features .pf-next__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
  border-top: var(--border-thin) solid var(--pf-deep-line);
  padding-top: var(--space-3);
}

.page-features .pf-next__links li {
  display: grid;
  gap: 2px;
}

.page-features .pf-next__links a {
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  color: var(--color-contrast-accent);
  text-decoration: none;
  border-bottom: var(--border-thin) solid transparent;
  justify-self: start;
}

.page-features .pf-next__links a:hover,
.page-features .pf-next__links a:focus-visible {
  border-bottom-color: var(--color-contrast-accent);
}

.page-features .pf-next__links span {
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
  opacity: 0.78;
}

/* ---------- 键盘焦点 ---------- */

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

/* ---------- 动效克制 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-features .pf-entry {
    transition: none;
  }
  .page-features .pf-entry:hover,
  .page-features .pf-entry:focus-within {
    transform: none;
  }
}

/* ---------- 平板 ---------- */

@media (min-width: 720px) {
  .page-features .pf-hero__split {
    grid-template-columns: 5fr 4fr;
  }

  .page-features .pf-legend {
    justify-content: flex-start;
  }

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

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

/* ---------- 桌面 ---------- */

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

  .page-features .pf-stats {
    position: absolute;
    inset: 0;
    margin: 0;
    display: block;
    pointer-events: none;
  }

  .page-features .pf-stat {
    position: absolute;
    width: min(240px, 26%);
    background: var(--color-contrast-surface);
  }

  .page-features .pf-stat:nth-child(1) {
    left: 0;
    top: 2%;
  }

  .page-features .pf-stat:nth-child(2) {
    right: 0;
    top: 26%;
  }

  .page-features .pf-stat:nth-child(3) {
    left: 5%;
    bottom: 20%;
  }

  .page-features .pf-stat:nth-child(4) {
    right: 4%;
    bottom: 0;
  }

  .page-features .pf-types {
    grid-template-columns: repeat(9, minmax(0, 1fr));
    gap: var(--space-4);
  }

  .page-features .pf-type--w5 {
    grid-column: 1 / span 5;
  }

  .page-features .pf-type--w4 {
    grid-column: 6 / span 4;
  }

  .page-features .pf-type--w3 {
    grid-column: 1 / span 3;
  }

  .page-features .pf-type--w6 {
    grid-column: 4 / span 6;
  }

  .page-features .pf-types > .pf-type:nth-child(3) {
    grid-column: 1 / span 4;
  }

  .page-features .pf-types > .pf-type:nth-child(4) {
    grid-column: 5 / span 5;
  }

  .page-features .pf-ranges {
    grid-template-columns: 5fr 4fr;
    align-items: start;
    gap: var(--space-6);
  }

  .page-features .pf-scenes {
    grid-template-columns: 6fr 3fr;
    align-items: start;
    gap: var(--space-6);
  }

  .page-features .pf-fields {
    grid-template-columns: 6fr 3fr;
    align-items: start;
    gap: var(--space-6);
  }

  .page-features .pf-fields__figure {
    position: sticky;
    top: var(--space-6);
  }
}
<<<END>>>